Matrix of luminous elements with controlled current sources and action method

FIELD: electricity.

SUBSTANCE: matrix of luminous elements (100) includes the first (LEE1), the second (LEE2) and the third (LEE3) light-emitting elements and the first (140) and the second (150) controlled current sources. The first light-emitting element differs with the first operating voltage VOpi at which or over which it can essentially emit the light. The second light-emitting element includes the first output (120a) and the second output (120b) connected to the second output of the first light-emitting element; at that, the second light-emitting element differs with the second operating voltage Vop2. The third light-emitting element includes the first output (130a) connected to the first output (110a) of the first light-emitting element and the second output (130b); at that, the third light-emitting element differs with the third operating voltage Vop3. The first controlled current source is connected between the first output of the first light-emitting element and the first output (120b) of the second light-emitting element, and the second controlled current source is connected between the second output (110b) of the first light-emitting element and the second output of the third light-emitting element.

EFFECT: reducing the number of circuit components.

15 cl, 5 dwg

 

The technical field to which the invention relates

The present invention relates, in General, the matrix light-emitting elements and, more particularly, to a light-emitting matrix, using controlled current sources, and methods for their actions.

The prior art inventions

Light-emitting elements, such as light emitting diodes (LEDs) are increasingly used in a wide range of applications, some examples of which are the sources of the backlight in liquid crystal displays, flashes for cameras on charge-coupled devices, General lighting, and other applications. In many of these applications, light-emitting diodes of different colors are set in a matrix to create different colored dots. The operating conditions of the light-emitting diode array can be as varied as the use of matrices, namely, those conditions that require, for example, low power, high operating temperature and small times on and off the light emitting diodes.

Typically, each matrix light-emitting diodes receiving power from the exciting circuit, configured to work in one of several different modes of excitation depending on the desired lighting effect is. Diagram of the excitation light-emitting diodes can be actuated in constant current mode, in which light-emitting diode matrix feeds a constant current to provide light with a constant intensity. The start circuit of light-emitting diodes can also be operated in AC mode, in which light-emitting diode matrix is powered by an alternating current to create a variable light intensity. Diagram of the excitation light-emitting diodes can also be operated in the mode pulse width modulation (PWM), wherein the light-emitting diode matrix is powered using the current signal from the PWM waveform of the current, in which the duration of the PWM wave determines the period of time during which the light-emitting diode matrix is included. PWM mode can be either constant current mode or AC mode to provide a combination of each of their properties, that is, constant or variable light intensity.

Unfortunately, to provide the above functionality, you need a large number of circuit components. For example, in the constant current mode, when the desired mode with PWM, you usually need at least one current source to the light-emitting diode matrix and one switch for each light emitting diode in the matrix In the case when the desired mode AC requires a complex current source made with the possibility of rapid changes in current levels. When in AC mode desired mode PWM, usually requires a complex current source and one switch for each light emitting diode in the matrix.

A large number of parts for operation and management of the light-emitting diode matrix degrades performance light-emitting diodes for many reasons, because each component increases the energy consumption of light emitting diode matrix and contributes to parasitic effects on the reduction of time on and off the light emitting diodes. Additionally, when the light-emitting diode matrix is used for operation at high temperature, each component will be required in the high temperature characteristics, additionally increases the cost of each required component. Confirmation of the problems associated with schemes run light-emitting diodes with a large number of parts can be seen in U.S. patent No. 5 736 881 issued Ortiz, revealing the configuration of the drive circuit with PWM for light emitting diode and light-emitting diode matrix, which uses a single current source to control multiple light-emitting diode chain.

The essence invented the I

Accordingly, it may be desirable to provide a light-emitting matrix and method steps, which can provide control of individual light-emitting elements in a matrix and which require fewer circuit components.

This and other aspects of the invention can be achieved in accordance with the independent claims of the present invention.

In one embodiment, the invention describes a light-emitting matrix, which includes first, second and third light emitting elements and first and second controlled current sources. The first light-emitting element includes first and second different conclusions and the first operating voltage VOP1at which or above which it essentially is able to emit light. The second light-emitting element includes a first output and a second output connected to the second output of the first light-emitting element and second light-emitting element is different the second operating voltage VOP2at which or above which a second light-emitting element being capable of emitting light. The third light-emitting element includes a first output connected to the first output of the first light-emitting element, and a second output, and the third light-emitting element differs tre is im operating voltage V OP3at which or above which it essentially is able to emit light. The first controlled current source connected between the first output of the first light-emitting element and the first output of the third light-emitting element, and a second controlled current source connected between the second output of the first light-emitting element and the second output of the second light-emitting element.

In another embodiment, the invention presents a method of light-emitting action of the matrix, and a light-emitting matrix, which includes the above-mentioned first, second and third light emitting elements, the first and second controlled current sources, the first bus of the power source connected to the first output of the second light-emitting element, and a second bus of the power source connected to the second output of the third light-emitting element. The method includes steps for enabling the first light-emitting element in which the first controlled current source is controlled to output the first current I1and the second controlled current source is controlled to output the second current I2. The first and second currents I1and I2output the first and second controllable current sources, fed by the first light-emitting element by a current sufficient to achieve, for less than the least the first working voltage VOP1, in which the first light-emitting element is, in fact, able to emit light.

In the third embodiment, the invention describes a light-emitting device that includes a light-emitting matrix, as described above, and here, as well as the power supply and the controller. The power supply includes a first output connected to the first bus of the power source and a second output connected to the second bus of the power supply. The controller includes a first output connected to the first controlled current source, and a second output connected to the second controlled current source, the first output provides a first control signal for controlling the supply of current from the first controlled current source and the second output provides a second control signal for controlling the supply of current from the second controlled current source.

As the essence of the variant example of implementation of the present invention it may be noted that two controlled current sources configured to control the inclusion of the three light-emitting elements, thereby reducing the quantity of the controlled current sources below 1:1-relation of the number of controllable current sources to the number of light-emitting elements driven with them what omashu. In this way the number of components for light-emitting matrix, such as a light emitting diode matrix, can be reduced, providing a faster, more energy efficient and cheaper light-emitting device.

Below are examples of the features and improvements of the light-emitting matrix, although these features and improvements should also be applied to a light emitting device and method steps of the light-emitting matrix. In one embodiment, the light-emitting matrix includes a fourth light-emitting element having a first output connected to the bus power supply, and a second output connected to either (i) to a common node of the first output of the first controlled current source and the first output of the second light-emitting element, or (ii) to the common node to the second output of the second controlled current source and the second output of the third light-emitting element. The fourth light-emitting element is switched on simultaneously with the turning on any of the first, second or third light emitting elements.

In another embodiment, the first light-emitting element includes at least one light emitting diode, and each of the second light-emitting element and the third light-emitting element, includes himself, at least one additional light-emitting diode, which is included in the first light emitting diode and/or made of a semiconductor material different from the one made at least one light-emitting diode contained in the first light-emitting diode. In accordance with the invention, these configurations made with the possibility of receiving circuits of the second and third light emitting diodes higher forward voltage than the first light-emitting diode.

In an additional embodiment, the matrix of light elements includes the element of energy storage connected to one or more light-emitting elements, for example a shunt capacitor connected in parallel, at least to the first, second or third light emitting elements. The installed drive power can be used to provide continuous illumination of a specific light-emitting element during a certain period of time or allow the simultaneous illumination of two or more light-emitting elements.

In an additional embodiment, each of the first, second and third light emitting elements comprises an element selected from the group consisting of light emitting diodes, organic svatos causehe diode, light-emitting diode alternating current, laser diode or incandescent bulbs.

As an additional example, the first controlled current source comprises a transistor having a port connected to the first bus of the power supply through a resistor, and a second controlled current source comprises a transistor having a port connected to the second bus power supply via a second resistor.

In yet another additional example, the first controlled current source comprises a transistor having a predefined gain current connected to the primary bus of the power source and the second controlled current source comprises a transistor having a predefined gain current, is connected to the second bus of the power source.

In yet another additional example, the first operating voltage of the first light-emitting element is smaller than the second operating voltage of the second light-emitting element and less than the third working voltage of the third light-emitting element.

Below are examples of the features and improvements of the method steps of a matrix of light elements, although these signs and improvements may also be applied to the matrix of light elements, and also to the design of the light elements. In particular the om embodiment, the operation of the light-emitting matrix includes turning on the second light-emitting element by the first controlled current source is controlled to output current is essentially zero, and the second controlled current source is controlled to output a third current I3. In this embodiment, the third current I3nourishes the second light-emitting element and sufficient to achieve it, at least the second operating voltage VOP2, wherein the second light-emitting element is, in fact, able to emit light.

As an additional example, the method steps include the introduction of a third light-emitting element through the first controlled current source is controlled to output a fourth current I4and the second controlled current source is controlled to output current essentially equal to zero. In this embodiment, the fourth current I4nourishes the third light-emitting element and sufficient to achieve it, at least a third operating voltage VOP3, wherein the third light-emitting element is, in fact, able to emit light.

As an additional example, the method steps include the lack of inclusion of light-emitting elements via the first controlled current source is controlled to output current is essentially zero, and the second controlled current source control which is for output current, essentially, zero. In this embodiment, none of the light-emitting elements of the supply current is not supplied and, thus, no light output is not generated.

In an additional example of the mode of action of a matrix of light elements of the first controlled current source includes a transistor of the first current source, connected to the primary bus of the power source through the first predefined resistor R1and the second controlled current source includes a transistor of the second current source, connected to the second bus power supply via a second predefined resistor R2. In this scheme the above action control the first controllable current source to output the first current I1includes steps for the application of the voltage V1between the control output transistor of the first current source and the first bus of the power source to output the first mentioned current I1. Further, the above-mentioned control action of the second controlled current source for outputting the second current I2includes action on the application voltage V2between the control output transistor of the second current source and the second bus of the power output mentioned second output current I2. To complement Inom the example above, the action control the second controllable current source for outputting a third current I 3includes action on the application voltage V3between the control output transistor of the second current source and the second bus power supply for output referred third current I3. Additionally, the action control the first controllable current source to output a fourth current I4includes action on the application voltage V4between the control output transistor of the first current source and the first bus of the power output mentioned fourth current I4.

In another additional example of the mode of action of a matrix of light elements of the first controlled current source includes a transistor of the first current source having a current gain βiand connected to the first bus of the power supply source and to the first and third light emitting elements, and a second controlled current source having a current gain βjand connected to the second bus of the power supply source and to the first and second light emitting elements. In this scheme the above action control the first current source to output the first current I1includes the effect of the drain current I1i1from the control output transistor of the first controlled current source to output the first mentioned current I1where βi1 - gain current of the transistor of the first controlled current source when the output of the first current I1. In an additional example, the above action to control a second current source for outputting the second current I2includes action to ensure the supply current I2j2to control the output transistor of the second controlled current source to output the aforementioned second current I2where βj2- gain current of the transistor of the second controlled current source when the output of the second current I2. The above action control the second controllable current source for outputting a third current I3includes action to ensure the supply current I3j3to control the output transistor of the second current source to output referred third output current I3where βj3- gain current of the transistor of the second controlled current source when the output of the third current I3. In an additional example, the action control the first controllable current source to output a fourth current I4includes action to ensure drain current I4i4from the control output transistor (142) of the first current source to output the aforementioned fourth current I4where βi4- gain stream transistor of the first controlled current source when the output of the fourth current I 4.

The actions of the methods described above can be implemented using a computer program, i.e. software or using one or more special electronic optimization schemes, that is, using hardware, or in hybrid/hardware form, i.e. with the help of a software component and a hardware component. The computer program may be implemented as machine-readable instruction set on any appropriate programming language, such as, for example, VHDL, assembler, JAVA, C++, and can be stored on a machine-readable medium (removable disk, volatile or non-volatile memory built-in memory/CPU etc), a set of instructions executed by programmable computer or other programmable device to perform the assigned functions. The computer program may be available from a network such as the Worldwide Web, from which it may be loaded.

These and other aspects of the present invention will become apparent from the further description and explained with reference to an implementation option, described hereafter.

Description of the drawings

Figure 1 - example of a variant of implementation of the matrix of light elements corresponding to the present invention.

Figure 2 - the first example is done by the means of a matrix of light elements, shown in figure 1, corresponding to the present invention.

Figure 3 is a second embodiment of a matrix of light elements, shown in figure 1, corresponding to the present invention.

Figure 4 - way matrix of light elements, shown in figure 1, and the corresponding state table corresponding to the present invention.

5 is the device length element containing a matrix of light elements, shown in figure 1, corresponding to the present invention.

A detailed description of the preferred embodiments

Figure 1 shows an example of a variant of implementation of the matrix 100 light elements corresponding to the present invention. Matrix 100 includes a first light-emitting element (LEE) 110 having a first output 1l0a and second output 1l0b. Matrix 100 additionally includes a second LEE 120, having a first output 120a, made with the possibility of connection to the first bus 172 of the power supply (in the example indicated as Vcc), and the second output 120b connected to the second output of the first LEE 110. Matrix 100 additionally includes a third circuit 130 LEE, which has a first output 130A connected to the first output 110A of the first circuit LEE 110, and a second output 130b, made with the possibility of connection to the second bus 174 of the power source (in the example is specified as the pot is ground potential). The term "light emitting element" or "LEE"as used here, refers to any light-emitting element, scheme, device or component that includes a light emitting diode (LED), organic light emitting diodes (OLED), light emitting diodes alternating current (AC LED), a laser diode or any other light-emitting element such as a light bulb, etc.

Matrix 100 additionally includes first and second sources 140 and 150 current, and the first source 140 current connected between the first output 110A of the first LEE 110 and the first output 120a of the second LEE 120, and the second source 150 current is connected between the second output 110b of the first LEE 110 and the second output 130b of the third LEE 130. As you can see, the matrix 100 includes one LEE, is connected between the first and second sources 140 and 150 current. LEE 110 is connected between the first and second sources 140 and 150 current and anodes LEE 110 and 130 are connected together to the output of the first source 140 current, and the cathode LEE 110 and 120 connected together to the input of the source 150 current.

Alternatively, the matrix 100 includes a savings element, connected to supply electricity to one or more of the LEE 110, 120 and 130. In the example shown variant of implementation, the capacitor 160 is connected in parallel to the second LEE 120, and the parallel connection of the capacitor 160 and LEE 120 is connected in series with razvozya the current element 162. Decoupling element in the example is not as light-emitting diode, and as a Schottky diode with a low forward voltage drop. Alternatively, you can use light-emitting element. The purpose of the decoupling element 162 is to prevent discharge of the capacitor 160 while turning it on the first or third LEE 110 or 130. The capacitor 160 is configured to provide power to the second LEE 120 during periods when the springs 140 or 150 current does not provide a current, as will be further described below. In another embodiment, the cumulative element 160 may be an inductor connected in series with one or more of the LEE 110, 120 and 130.

In a specific embodiment of the invention the first, second and third LEE 110, 120 and 130, essentially, with the opportunity to work in various modes of displacement, for example, at different operating voltages. Specifically, the first LEE 110 different first voltage at which or above which the first LEE 110, essentially, able to emit light. Similarly, the second LEE 120 different second voltage at which or above which LEE 120, essentially, able to emit light, and the third LEE 130 differs third voltage at which or above which it essentially is able to emit light. Additionally, clarifying, first working voltage is the group of V OP1lower than the second or third direct voltage VOP2and VOP3corresponding to the second and third LEE 120 and 130. This scheme provides the option to enable LEE 110, 120 and 130, as will be shown below.

In one of the examples of embodiments LEE 110, 120 and 130 are diagrams, each of which includes at least one light emitting diode. In this embodiment, each of the number of LEE 110, 120 and 130 may use a variety (i.e. 2, 3, 5, 10, or more) diodes connected in series, parallel connected diodes or combinations of diodes connected in series and in parallel. Additionally, for the manufacture of light-emitting diodes can be used various materials, such as gallium nitride, gallium phosphide, or other materials.

In one of the embodiments of the invention, the first operating voltage VOP1the first LEE 110 is smaller than each of the second operating voltage VOP2the second LEE 120 and the third operating voltage VOP3third LEE 130. This difference in operating voltages between LEE can be implemented in different ways. For example, in the embodiment, in which LEE 110, 120 and 130 are light-emitting diode circuits, second and third light-emitting diode circuits 120 and 130, compared to the light-emitting dio is AMI first light emitting diode circuit 110, may include at least one additional serially connected light-emitting diode. In another example, for the manufacture of light-emitting diodes of the first light emitting diode circuit 110 can be used in other semiconductor materials and/or technology to have a lower forward voltage, compared to the direct-voltage light-emitting diodes in the second and third light-emitting diode circuits 120 and 130. In another example, you can use the additional circuit components (resistor divider and so on)to ensure that the second and third light-emitting diode circuits 120 and 130 higher direct voltage, compared with the first light emitting diode circuit 110. Experts in the art should understand that the filing of a higher forward voltage to the second and third light emitting diode circuit, compared with the first light emitting diode circuit 110 can be used in a variety of ways.

The second and third direct voltage VFLED2and VFLED3for the respective light-emitting diode circuits 120 and 130 may be different or may be essentially the same. The difference in direct voltages can be achieved using the aforementioned techniques use different numbers of light emitting diodes and/or other PEFC is sequential or parallel composition or using, for example, various semiconductor materials.

Additionally, the voltage difference between the first and second buses 172 and 174 of the power source may be a constant value. Additionally, alternative, bus 172 and 174 of the power source can be provided with a time-varying voltage, for example, rectified voltage obtained directly or through a transformer from the main network, or which is the voltage pulse width modulation (PWM), or a voltage containing a high voltage pulse, as will be further described below.

From the preceding description it should be clear that each of the control signals CTLiand CTLjconfigured to control the supply current Iiand Ijthe first and second sources 140 and 150 current. It should also be understood that each control signal CTLiand CTLjcan control the amplitude of the supply currents Iiand Ij. The amplitude of the supply currents can be controlled to turn on one of the selected light-emitting diode circuits 110, 120 and 130. The amplitude of the currents Iiand Ijmay change in time, in order to control the period of time during which the selected light-emitting diode circuit is enabled, and the light level of the output signal generated by the light-emitting diode with the emnd. Controls the amplitude of the supply currents in time can be used to implement a combination of effects.

These embodiments of additionally described below.

Figure 2 shows the first embodiment of the matrix 100 light elements, is shown in figure 1, corresponding to the present invention, with previously identified features retaining their reference designations. As seen in the drawing, the first and second sources 140 and 150 are current as voltage controlled current sources, each current source includes a transistor with the emitter negative feedback. The emitter resistor can be formed with a transistor as an integral part of its structure, can be added from the outside to the transistor structure, or be a combination of both approaches, in which the emitter resistor is used in combination with a resistor connected from the outside.

As shown in the drawing, the first source 140 current includes a p-n-p transistor 142 having a port (emitter output), connected to the first bus (Vcc) the power source through the first predefined resistor R1. The first control signal CTLiis applied as a voltageVibetween the control output (base) of the transistor of the first source 142 current and the first bus 172 is the source of power. Accordingly, the output current source 140 current can be determined as a function of voltageVi:

,

where the transistor 142 current source has a characteristic voltage drop across the transition base-emitter voltage equal to 0.7 V, R1represents the value of the first emitter resistance 144,Vithe voltage between the base of the output transistor 142 and the first bus 172 of the power supply, andIi- controlled output current source 140 current. The first resistor R1acts as a sensor element current and voltageVican be adjusted to provide the desired currentIi. Thus, submission 140 current can be controlled to provide the desired output currentIieven if the power supply is not regulated. In addition, the voltage of the first control signal CTLican be changed dynamically to provide such a voltageVithat is necessary to maintain the desired currentIi.

The second source 150 current is identical to the source 140 current and contains n-p-n transistor 152 having a port (emitter output), connected to the second bus of the power supply (shown as ground potential) via a second predefined resistor R2. Controlled output currentI jcan be determined by a method similar to that used forI1in which the second control signal CTLjis applied as a voltageVjbetween the base of the output transistor 152 of the second current source and the second bus 174 to the power supply. Output currentIjfrom source 150 current can be determined as a function of voltageVj:

,

where the transistor 152 of the second current source has a characteristic voltage drop across the transition base-emitter voltage equal to 0.7 V, the second resistor R2represents the value of the emitter resistance 154,Vjthe voltage between the base of the output transistor 152 and the second bus 174 to the power supply, andIj- controlled output current source 150 current. A second resistor R2acts as a sensor element current and voltageVjcan be adjusted to provide the desired currentIj. VoltageVjcan be changed dynamically in order to prevent the condition leakage current when LEE starts to feel warm.

From the above it should be clear that to get a different supply currentsIifor the first source 140 current can be achieved in different voltageViand to get a different supply currentsI/I> jfor the second source 150 current can be achieved in different voltageVj. Various combinations of supply currentsIiandIjcan be used to selectively enable each LEE from among LEE 110, 120 and 130, depending on the operating voltage of each LEE. Examples of embodiments of these processes are additionally explained below.

Although both the first and second sources 140 and 150 current, respectively, shown as p-n-p and n-p-n transistors, specialists in the art should understand that the current source may be implemented as p-n-p transistor or n-p-n transistor as a MOSFET transistor, JFET transistor as an operational amplifier, and other similar structures.

Figure 3 shows a second variant implementation of the matrix 100 light elements corresponding to the present invention, with previously identified features retaining their reference designations. In this embodiment, the matrix 100 includes a fourth LEE 135, placed between the first bus 172 of the power supply source and the first source 140 current, fourth LEE 135 having a fourth operating voltage VOP4at which or above which it essentially is able to emit light. In the form shown in the drawing the embodiment, the fourth LEE 135 includes a first pad 135a connected to p the pout bus 172 of the power supply, and the second conclusion 135b connected between the first bus 172 of the power supply and common node, consisting of the first (emitter) output transistor 142 of the first current source and the first output of the second LEE 120. Thanks to the consistent configuration with first, second and third LEE 110, 120, 130, fourth LEE 135 will provide radiation during start-up, any LEE from among the first, second and third LEE 110, 120 and 130. This arrangement may be advantageous for providing a specific light output when you need two LEE to provide such light output. Specialist in the art should understand that the fourth LEE 135 may be an alternative connected between the second bus 174 power supply and a common node of the second (emitter) output transistor 152 of the second current source and the second output of the third LEE 130.

As shown in the drawing, the first and second sources 140 and 150 are current controlled current sources current. In this variant, the first and second sources 140 and 150 current includes first and second transistors 142 and 152 current sources, respectively, the first and second transistors 142 and 152 of the current sources having a gain current βiand βjrepresenting the relationship of the collector current of the transistor to its current base. Transistor 142 of the first source is an eye includes a port (emitter output), connected to the first bus 172 of the power supply source and to the first and third light emitting elements 110, 130, and the transistor 152 of the second current source includes a port (emitter output), connected to the second bus 174 power source and to the first and second light emitting elements 110, 120.

In this embodiment, the first control signal CTLiis the base current Ib,iable to manage/limit the transistor 142 to considering its gain current βito provide the desired current Iifrom its collector output:

Ii= βi· Ib,i

Similarly, the second control signal CTLjis the base current Ib,jable to manage/limit the transistor 152 to considering its gain current βjto provide the desired current Ijfrom its collector output:

Ij= βj· Ib,j

Depending on the type of transistor that is selected for the current sources, the gain of current βiand βjmay be different for the two current sources, and can even depend on the modes of operation of the current sources.

The operation of the current sources as current amplifiers provides benefits in that the emitter resistors 144 and 154 are not necessary, giving the result in less power dissipation and the operation of the circuit at a lower voltage power supply. This alternative implementation is also advantageous in that you can avoid mistakes voltage present at the base lines of the transistors 142 and 152 current sources or lines of power supply (possibly due to the large length of the inlet lines, ohmic losses and so on).

In a specific embodiment of the invention shunt elements, such as resistors, are connected in parallel with the second and third LEE 120 and 130, to eliminate the error levels of the currents supplied thereto, for example, when the first and second current sources do not provide the same level of current, although they are expected to provide equal currents. In this case, no light output from the second and third LEE unwanted and shunt elements can be used to prevent light output from the second and third LEE. These shunt elements can selectively switch to off current, which is the excess of current provided to one or more unselected LEE, so that the unselected LEE had no bias, sufficient for the level in which the light output. In this embodiment, errors during the planned inclusion of the second and third LEE 120 and 130, caused by the shunt elements can be taken into account when designing the system.

Figure 4 shows an example method 400 and corresponding to the table 480 States, describe the operation of the light-emitting matrix 100, in accordance with the present invention. Initially, at step 410 is determining the condition of the matrix 100 should work. If the matrix 100 should operate in the "1"state, in which the first LEE 110 emits light, the process continues to step 412, where the first source 140 current is controlled to supply the first current I1and at step 414, at which the second source 150 current is controlled to supply the second current I2. This operation provides the current for the first LEE 110 at a level that creates operating voltage VOP1on the first LEE 110, thereby making the first LEE 110, essentially, able to emit light. In the example of a variant embodiment of the invention, the voltage applied to the second and third LEE, significantly lower their operating voltages VOP2and VOP3so, essentially, through the second and third LEE no current will not leak and therefore the second and third LEE no light to be transmitted will not. In a specific embodiment, the first and second currents I1and I2essentially, the same level of current consumed through the first LEE 110, and accordingly, there is provided no power supply nor the second, nor the third LEE 120 and 130. In another embodiment, two supply current I1and I2different, for example, when tinily both of the second or third LEE 120, 130 consume, such as leakage current. In this embodiment, the level of current consumed by one or both of the second and/or third LEE 120, 130, depends on the difference of the currents supplied from two power sources. In a specific embodiment, in which light from the second and third LEE undesirable, the above-mentioned shunt elements (e.g., constant or variable resistor 530, Figure 5), can be used to eliminate this current.

In another embodiment, the currents provided by the two current sources, are set at different values, both values are different from zero. In this case, two or more LEE can emit light at the same time. The level of the light output emitted from each LEE, depends on the ratio of the currents.

If the matrix 100 selected state "2", in which the second LEE 120 emits light, the process continues to step 422, where the first source 140 current is controlled to supply essentially zero current, and the second source 150 current is controlled to supply a third current I3(step 424). The output current I3is supplied to the second LEE 120 and sufficient to obtain at least the operating voltage VOP2on the second LEE 120, thus making the second LEE 120, essentially, able to emit light. Since the first source 140 current is controlled so as to provide to you the ode, essentially zero current, the first and third LEE 110 and 130 is completely turned off.

If the matrix 100 selected state "3"in which the third LEE 130 emits light, the process continues at step 432 where the first source 140 current is controlled to supply the fourth current I4and the second source 150 current is controlled to output essentially zero current (step 434). The output current I4served on the third LEE 130 and sufficient to obtain, at least, a direct voltage VOP3on the third LEE 130, making, thus, the third LEE 130, essentially, able to emit light. Since the second source 150 current is controlled to output essentially zero current, the first and second LEE 110 and 120 are completely switched off.

If the matrix 100 selected state "4", in which each LEE from among the first, second and third LEE 110, 120 and 130, in essence, is turned off, the first and second sources 140 and 150 current is controlled to output essentially zero current. Minimum or zero current is fed to each LEE from among the first, second and third LEE 110, 120 and 130, and, in fact, there is no offset, equal to or greater than the corresponding working voltage VOP1VOP2VOP3each of which is essentially turned off.

In the examples of embodiments that are compatible with the matrix shown in figure 2, step 412 may be performed by way of the application of the first control voltage V1between the base of the output transistor 142 and the first bus 172 of the power supply, voltageV1managing the transistor 142 of the first current source to generate the first currentI1. Step 414 may be performed in a similar way, applying the second control voltageV2between the base of the output transistor 152 and the second bus 174 of the power source voltageV2controlling the transistor 152 of the second current source to generate a second currentI2. Step 422 control the first source 140 current for supplying essentially zero current can be accomplished by reducing the voltage ofVito zero. Step 424 may be performed by applying a third control voltage V3between the base of the output transistor 152 and the second bus 174 of the power source voltage V3controlling the transistor 152 of the second current source for supplying a third current I3. Step 432 may be performed by applying a fourth control voltage V4between the base of the output transistor 142 and bus 172 of the first power source voltage V4controlling the transistor 142 of the first current source to generate a fourth current I4. Step 434 managing a second source 150 current to provide essentially zero current, can be done put the m voltage reduction Vjto zero. Step 442 control the first source 140 current to provide essentially zero current, can be done by reducing the voltageVjto zero, and step 444 to control a second source 150 current to provide essentially zero current, can be done by reducing the voltageVjto zero.

In the examples of embodiments that are compatible with the matrix shown in Figure 3, step 412 may be performed by removal of the first control current, is approximately equal to I1i1from the point of connection of the base of the transistor 142 of the first current source, creating, thus, the second current I2. Step 414 may be performed in a similar way, by applying the second control current, is approximately equal to I2j2in the connection point of the base of the transistor 152 of the second current source, thereby creating a second current I2. Step 422 may be made by filing essentially zero current at the connection point of the base of the transistor 152 of the first current source. Step 424 may be made by filing a third control current approximately equal to I3j3in the connection point of the base of the transistor 152 of the second current source, thereby creating a third current I3. Step 432 may be performed by diversion of the fourth control current, approximately RA is tion I 4j4from the point of connection of the base of the transistor 142 of the first current source, thus creating a fourth current I4. Step 434 may be performed by diversion of essentially zero current from the connection point of the base of the transistor 152 of the second current source. Step 442 may be accomplished by removal of essentially zero current from the connection point of the base of the transistor 142 of the first current source. Step 444 may be made by filing essentially zero current at the connection point of the base of the transistor 152 of the second current source.

From the above we can see the following relations between the working voltages of the first, second and third LEE:

VOP1<VOP2VOP3

The difference between the operating voltages are preferably selected in accordance with the supply voltage.

Working voltage corresponding to the first LEE 110 is the lowest value of the first, second and third LEE 110, 120 and 130, and the first LEE 110 corresponds LEE, which is activated when both sources 140 and 150 current is controlled so as to provide the output current. Working voltage corresponding to the second and third LEE 120 and 130 are voltages higher level and meet LEE, which feed current, using one of the two sources 130 or 140 current or both of the current source, and in this case, DL is both current sources are substantially different currents. When using the fourth LEE 135 has a characteristic operating voltage VOP4. The operating voltage of the fourth LEE may have any desired value.

For purposes of example, but not limitation, the first, second and third LEE 110, 120 and 130 are formed as light-emitting diode circuit, and the first light emitting diode circuit 110 is arranged to emission of red light. Due to the serial connection of several red light emitting diode, the nominal forward voltage of the first light emitting diode circuit 110 is equal to 5.7 V At rated current 350 mA. Light-emitting diodes of the second light-emitting diode circuit 120 emit green light. Thanks to the mixed serial and parallel connection of several green light-emitting diodes, the nominal forward voltage of the second light-emitting diode circuit 120 is equal to 20.5 In at the rated current of 700 mA. Light-emitting diode of the third light-emitting diode circuit 130 emit blue light. Due to the serial connection of several blue light-emitting diodes, the nominal forward voltage of the third light-emitting diode circuit 130 is equal to 20.5 In at the rated current of 350 mA.

In this particular example, a variant implementation of the supply voltage for the device can be chosen equal to the 23rd Century to enable the first light is slooowwww diode circuit 110 to approximately half of its nominal optical output, the first source 140 current is set so as to provide a current of 175 mA, and the second source 150 current is set so as to provide a current of 175 mA. This current will flow through the first light emitting diode circuit 110 including the first light emitting diode circuit 110 to emit light. Working (i.e. direct) voltage of the first light emitting diode circuit 110 in this particular current value can be in the range of 5 C. Taking the same characteristics for the first and second sources 140 and 150 current, the voltage at the first source 140 current equal to 9 C. the same value 9 will be present as a voltage on the second source 150 current. Thus, the voltage applied to both, the second and third light-emitting diode circuits 120 and 130, will be equal to the 14th Century When the voltage level of the second and third light-emitting diode circuits 120 and 130 will not consume any significant current, since their nominal voltage is equal to 20.5 C. Thus, the second and third light-emitting diode circuits 120 and 130 will not give any light output and in this operating mode, only the red light-emitting diodes in the first light emitting diode circuit 110 will emit light.

To turn on the second light-emitting diode circuit 120 to create its nominal optical output, the first source 140 current is ustanavlivaetsya so, to no current, and the second source 150 current is set so as to provide the output current of 700 mA. This current 700 mA will flow through the second light-emitting diode circuit 120, thus including the second light emitting diode circuit to emit light. For the first or the third light-emitting diode circuits 110 and 130 no signal current and, thus, they do not provide any light output. Accordingly, in this mode only the green light-emitting diodes in the second light-emitting diode circuit 120 will radiate light.

If the third light-emitting diode circuit must be enabled to generate approximately 60% of its nominal optical output, the first source 140 current is set so as to provide the output current of 210 mA, and the second source 150 current is set so that the output current was absent. Current 210 mA will flow through the third light emitting diode circuit 130, thereby including the third light-emitting diode circuit for the light emission. For the first and third light-emitting diode circuits 110 and 120 no current is not supplied, so none of them gives a light output. Accordingly, in this mode, only the blue light-emitting diode of the third light-emitting diode scheme will radiate light. See if the EP is only one example implementation, covered by the present invention, and specialists in the art should understand that in other embodiments, implementation of the present invention can alternatively be used in other light-emitting elements configured to other operating modes.

Figure 5 shows the light emitting device 500 containing a light-emitting matrix 100 corresponding to the present invention, with previously identified features retaining their reference designations. In addition to the light-emitting matrix 100, the light emitting device 500 additionally includes a source 510 of the power supply, configured to supply power to the first and second tire 172 and 174 of the power source and the controller 520 of the current source.

In the shown example, the case for source 510 power supply includes outputs high-grade and low-grade tires, designated as the voltages Vccand grounding, although in other embodiments, implementation of the outputs of the high-grade and low-grade tires can be different as described above. Alternatively, the source 510 power supply includes an input port IN, made with the possibility of signal 528 to change output level output voltage Vccas will be described in more detail below. To omnitele, alternatively, the source 510 power supply includes an output port OUT to ensure signal 515 feedback to the controller 520, which can be done with the ability to control the inclusion of LEE, as described below. As explained above, the source 510 power supply can be configured to provide a regulated or unregulated voltage, depending on how may be operated in first and second sources 130 and 140 current to provide a desired level of current, or to limit the current they provide. In the variant example of implementation of the first bus 172 of the power supply provides a voltage of 23 V DC and the second bus 174 power supply has a ground potential, although in a different implementation may use other voltage levels. Thanks to the peculiarities of the current control of the first and second current sources, the voltage can be regulated or unregulated voltage. For example, the power source may be configured to provide a time varying voltage, such as voltage in the form of a PWM signal that is synchronized with the operation of the springs 140 and 150 current, as further explained below.

The light emitting device 500 additionally includes a controller is 520 current source, made with the possibility of implementation stages of the processes illustrated above in figure 4. The controller 520 includes a first output 520a, connected to the first source 130 current to provide the first control signal 524 (CTLi), and the second output 520b connected to the second source 150 current, for providing a second control signal 526 (CTLj). The first control signal 524 is configured to control supply of the first current source 140 current, and the second control signal 526 is configured to control supply of the second current source 150 current as described above. The controller 520 may additionally include input 520c, connected to receive commands 522 inclusion LEE. Alternatively, the controller can be used, based on pre-defined/pre-loaded plants. Additionally, as an option, the controller includes an output 520d, is arranged to supply the control signal 528 source 510 power supply control signal 528 voltage made with the possibility of change (e.g. increase) the level of the output voltage source 510 power supply based on private criteria, such as increased load matrix 100. Additionally, as an option, the controller includes input 520e for receiving signal 515 feedback signal is Ala 515 feedback providing information about the current state of the output of the voltage source 510 power supply, with which the controller 520 can intelligently choose which LEE can work together with him. Details of this work are further outlined below.

The controller 520 of the power source can be configured to provide first and second control signals 524 and 526 in various forms. For example, to obtain the constant glow of the first LEE 110, as shown in figure 2, the controller 520 may be configured to provide the first control signal 524 in the form of a voltage, which results in a voltageVibetween the base of the output transistor 142 of the first current source and the first bus 172 of the power supply, the controller 520 may additionally be configured to provide the second control signal 526 in the form of a voltage, which results in a voltageVjbetween the base of the output transistor 152 of the second current source and the second bus 172 of the power supply, as described above. Similarly, the source 510 power supply can be controlled to change the level of one or both of the voltage control signals 524 and 526 to change the intensity or brightness LEE. In another embodiment, one or the BA control signal 524 and 526 have a waveform with pulse width modulation (PWM), made with the ability to control each source 140 and 150 current, for supplying wave current with PWM for LEE. As is known in the art, the current wave with PWM can be used to control the period of inclusion LEE, the duration of such periods include determining the amount of light output LEE.

In an additional variant example of implementation of the matrix 100 LEE performed with the opportunity to work with a shunt capacitance connected to one or more circuits 110, 120 and 130 LEE (figure 5 with a shunt capacitor 160 shows a diagram 120 LEE, although shunt capacitor 160 can be used with multiple or all the schemes LEE). This arrangement can be used to provide continuous illumination of the particular LEE for some period of time or to allow the simultaneous illumination of two or more LEE, the latter mode occurs, for example, when a previously disconnected LEE begins to take wave current with PWM and supply current to the other LEE stops, then a shunt capacitor is disconnected LEE provides the current for the excitation of its LEE for continuous operation.

The capacitance value of the capacitor 160 connected to one or more LEE (each of which may connect a capacitor having the same or different capacity), is based on several factors, including the periods of the time T the current wave with PWM (when used), the acceptable value of the pulsations applied to the connected LEE, and duration of the "off state", and the term "off work" refers to the state in which the accumulated charge shunt capacitor 160 includes corresponding LEE after the supply of current to the LEE terminated. As should be clear, smaller capacitors can be used, when applied wave current with PWM includes a shorter period of timeTand/or when the off time work shorter, and/or when desirable or acceptable large amount of ripple. Large capacity can be used in cases when due to the applied current wave with PWM is ensured over a long period of timeTand/or when you want a longer period off work status, and/or when the desired or permissible smaller amount of ripple to

Another factor possibly influencing the choice of the value of the capacitor(s) 160 is valid delay when enabling and disabling LEE using shunt capacitor 160. In particular, the value of capacitor 160 may hinder how quickly previously off LEE will be able to achieve the state of the operating voltage VOPor how fast already included LEE can b is to be disabled. Under such circumstances, the rise time and fall transients between disabled and enabled States of the current wave with PWM may deteriorate beyond acceptable limits, leading in some circumstances to erroneous emission of light (delayed off LEE) and/or to pass light in other circumstances (delayed enable LEE).

One example approach to minimize the effects of delay on/off is to provide an intermittent effect compensation for faster rise time and fall transient. For example, the rise time to go off earlier LEE in an enabled state can be accelerated by providing for a short period of time a higher level of current for LEE, thus faster charging him shunt capacitor 160 and reaching forward voltage rather than when the desired level of currentIapplied constantly during the timetwhen a specific LEE.

Due to certain current-voltage characteristics of LEE, at lower operating voltages, the current falls. Discharge capacitor by supplying energy to LEE may result in a prolonged period of time, during which LEE will create only a very weak visible light. For faster final shutdown LEE m which can be used to connect additional load with the appropriate characteristics (e.g., the resistor 530 or serial connection of a resistor and Zener diode). In addition, the controller 520 may be programmed in such a way as to compensate for the omission or additional light output from LEE with a shunt capacitor, and can produce compensation in relation to the time-averaged light output.

To reduce the load on the power supply can be also performed an additional process. For example, the inclusion of specific LEE can be synchronized with the load conditions of the source 510 power supply so that the inclusion of LEE, with high direct voltage and/or connected to a large shunt capacitance, was synchronized, when possible, to match the conditions of low load source 510 power supply. In this direction, source 520 power supply can be configured to provide a time varying voltage to the first and/or second tire 172, 174, whereby high output voltage (for example, temporary overvoltages or wave voltage with PWM) is provided synchronously with the condition of high load. In this embodiment, the source 510 power supply may include a port for receiving the control signal 528, when the controller 520 perceives the condition of high load.

Additional is about, the on cycle can also be designed to output a voltage source 510 power supply when it is available. Using signal 515 feedback, for example, representing the output voltage source 510 power supply to turn on can be selected LEE. For example, when using an unregulated power supply, which is obtained from the rectified mains voltage, the supply voltage will be some ripple.

Signal 515 feedback may provide the supply voltage. The inclusion of LEE, low voltage, can be synchronized with the period of time from a source 510 of power supplied low voltage. Using this method, you can improve overall system efficiency and reduce costs.

Thus, as one aspect of the present invention can be considered that the two current source can be configured to control the inclusion of the three light-emitting elements, thereby reducing the number of current sources to the number of light-emitting elements that are managed by them, below 1:1. In this way the number of components in the matrix of light elements can be reduced, providing a faster, more energy efficient and cheaper the e light-emitting device.

How easy it must be understood by the experts in the art, the described processes may be implemented by hardware, software, firmware, hardware or a combination of these embodiments, depending on the situation. In addition, some or all of the described processes may be implemented as machine-readable instruction set, the ever-present on the machine-readable medium (removable disk, volatile or non-volatile memory, embedded processors, and so on), the set of instructions executed by programmable computer or other programmable device to perform the assigned functions.

It should be noted that the term "comprising" does not exclude other signs, and the singular does not exclude the plural, except when it is specifically mentioned. Additionally it should be noted that the elements described in connection with various types of exercise, can be combined. It is also noted that the signs of the references in the claims should not be construed as limiting the scope of the claims. The term "connection" is used to indicate either a direct connection between the two signs or indirect connection of two signs through an intermediate structure. the taps, shown in the flowchart of the execution sequence of the method is not limited to the specific sequence, and later the number of the steps can be performed simultaneously or earlier stages with the earlier rooms in accordance with the invention.

The above description has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to just open the form and it is obvious that in the light of the disclosed description of the numerous possible modifications and variations. Describes the different ways of implementation were selected to best explain the principles of the invention and its practical application to thereby enable specialists in the art to best utilize the invention in various embodiments, implementation and with various modifications suited to the particular question of use. It is implied that the scope of the invention is defined solely by the claims set forth at the end.

1. The matrix of light elements, comprising: a first light-emitting element (110)having a first output and a second output, the first light-emitting element (110) is characterized by a first operating voltage (VOP1)at which or above which the first light-emitting element (110), with the society, capable of emitting light;
the second light-emitting element (120)having a first output and a second output connected to the second output of the first light-emitting element (110), and the second light-emitting element (120) is characterized by a second operating voltage (VOR)at which or above which a second light-emitting element (120)being capable of emitting light; a third light-emitting element (130)having a first output connected to the first output of the first light-emitting element, and a second output, and the third light-emitting element (130) is characterized by a third operating voltage (VOR)at which or above which the third light-emitting element (130)being capable of emitting light;
the first controlled source (140) current, is connected between the first output of the first light-emitting element (110) and the first output of the second light-emitting element (120); and the second controlled source (150) current, is connected between the second output of the first light-emitting element (110) and the second output of the third light-emitting element (130).

2. The matrix of light elements according to claim 1, characterized in that it further comprises a fourth light-emitting element (135)having a first output connected to the bus (172, 174) of the power source and the second terminal is connected either to a common node of the first what about the output of the first controlled source (140) current and the first output of the second light-emitting element (120), or to the common node to the second output of the second controlled source (150) current and the second output of the third light-emitting element (130).

3. The matrix of light elements according to claim 1 or 2, characterized in that it further contains an element (160) energy storage connected at least to one of the first, second or third light emitting elements(110, 120, 130).

4. The matrix of light elements according to claim 3, characterized in that the element (160) energy storage includes a capacitor connected in parallel, at least to the first, second or third light emitting elements(110, 120, 130).

5. The matrix of light elements according to claim 1, characterized in that the first, second or third light emitting elements (110, 120, 130) are selected from the group consisting of light emitting diodes, organic light-emitting diode, light emitting diode alternating current, laser diode or incandescent bulbs.

6. The matrix of light elements according to any one of claims 1, 2 and 5, characterized in that the first light-emitting element (110) includes at least one light emitting diode, each of the second light-emitting element (120) and the third light-emitting element (130) contains at least one additional light-emitting diode, similar to that contained in the first light-emitting element (110, or made of a semiconductor material that is different, at least from a semiconductor material of one light-emitting diode contained in the first light-emitting element (110).

7. The matrix of light elements according to claim 1 or 2, characterized in that the first controlled source (140) current contains a transistor (142) of the first current source, having an input connected to the first bus 172 power, while the second controlled source (150) current contains a transistor (152) of the second current source, having an input connected to the second bus (174) power supply.

8. The matrix of light elements according to claim 7, characterized in that the transistor (142) of the first current source is connected to the first bus (172) power supply via the first resistor (144), the transistor (152) of the second current source is connected to the second power rail through a second resistor (154).

9. The matrix of light elements according to claim 1, characterized in that the first operating voltage (VOP1the first light-emitting element (110) is less than each of the second working voltage (VORthe second light-emitting element (120) and the third operating voltage (VOR) of the third light-emitting element (130).

10. Light-emitting device (500), comprising: a light-emitting matrix (100) according to any one of claims 1 to 8; source (510) power supply having the first choice of the output, connected to the first bus (172) power supply, and a second output connected to the second bus (174) power supply; and a controller (520)having a first output (a)connected to the first controlled source (140) current, and the second output (520b)connected to the second controlled source (150) current, and the first output (a) configured to provide the first control signal (524) for controlling the supply of current of the first controlled source (140) current, and the second output (520b) is arranged to provide the second control signal (526) for controlling the supply of current of the second controlled source (150) current.

11. The method (400) of the matrix (100) of light elements, and the matrix (100) of light elements includes the first light-emitting element (110)having first and second pins, the second light-emitting element (120)having a first output connected to the first bus (172) power supply, and a second output connected to the second output of the first light-emitting element (110), the third light-emitting element (130)having a first output connected to the first output of the first light-emitting element (110), and a second output connected to the second bus (174) power supply, the first controlled source (140) current, is connected between the first output of the first light-emitting element (110) and the first output of the second svetoslava the corresponding element (120), and the second controlled source (150) current, is connected between the second output of the first light-emitting element (110) and the second output of the third light-emitting element (130), the method includes steps in which: activate the first light-emitting element (110), for which: control the first controllable source (140) current output of the first current I1(412) and control the second controlled source (150) current output of the second current I2(414), while the first and second currents I1and I2derived from the first and second controlled source (140, 150) DC, served on the first light-emitting element (110), and current sufficient to achieve at least the first operating voltage (VOP1), in which the first light-emitting element (110) is, in fact, able to emit light.

12. The method according to claim 11, characterized in that it further comprises steps in which: activate the second light-emitting element (120), for which: control the first controllable source (140) current output essentially zero current (422) and control the second controlled source (150) current to output a third current I3(424), while said third current I3is supplied to the second light-emitting element (120) and sufficient to achieve it, at least the second operating voltage (VOR), when the cat the rum of the second light-emitting element (120) becomes, essentially, able to emit light.

13. The method according to claim 11 or 12, characterized in that it further comprises steps in which: activate the third light-emitting element (130), for which: control the first controllable source (140) voltage to output a fourth current I4(432) and control the second controlled source (150) current output essentially zero current (434), while the fourth current I4served on the third light-emitting element (130) and sufficient to achieve it, at least a third operating voltage (VOr), in which the third light-emitting element (130) is, in fact, able to emit light.

14. The method according to claim 11 or 12, characterized in that the first controlled source (140) current contains a transistor (142) of the first current source, connected to the first bus (172) power supply through the first predefined resistor R1(144), the second controlled source (150) current contains a transistor (152) of the second current source, connected to the second bus (174) power supply via a second predefined resistor R2(154), to control the first controllable source (140) current output of the first current I1(412) applied voltage V1between the control output transistor (142) of the first current source and the first bus (172) power supply for output per the th current I 1to control the second controlled source (150) current output of the second current I2(414) applied voltage V2between the control output transistor of the second current source and the second bus (174) power supply for outputting a second current I2to control the second controlled source (150) current to output a third current I3(424) applied voltage V3between the control output transistor (152) of the second current source and the second bus (174) power supply for outputting a third current I3to control the first controllable source (140) voltage to output a fourth current I4(432) applied voltage V4between the control output transistor (142) of the first current source and the first power rail to the output of the fourth current I4.

15. The method according to claim 11 or 12, characterized in that the first controlled source (140) current contains a transistor (142) of the first current source, connected to the first bus (172) power supply and to the first and third light emitting elements (110, 130), and transistor (142) of the first current source has a first coefficient βigain current, the second controlled source (150) current contains a transistor (152) of the second current source, connected to the second bus (174) power supply and to the first and second light emitting elements (110, 120)and the transistor (152) of the second current source has a second coefficient β jgain current, thus to control the first controllable source (140) current output of the first current I1(412) carry out the drain current I1i1from the control output transistor (142) of the first current source to output the first current I1where βi1- gain current of the transistor of the first controlled current source when the output of the first current I1to control the second controlled source (150) current output of the second current I2(414) submit current I2j2to the control output transistor (152) of the second current source to output a second output current I2where βj2- gain current of the transistor of the second controlled current source when the output of the second current I2to control the second controlled source (150) current to output a third current I3(424) submit current I3j3to the control output transistor (152) of the second current source to output a third current I3where βj3- gain current of the transistor of the second controlled current source when the output of the third current I3to control the first controllable source (140) voltage to output a fourth current I4(432) carry out the drain current I4i4from the control output transistor (142) of the first histocytoma to output a fourth current I 4where βi4- gain current of the transistor of the first controlled current source when the output of the fourth current I4.



 

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20 cl, 2 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention relates to a light-emitting device (1) having an exciter (10) and a flat light-emitting element (20), where the exciter (10) is connected to a source (2) and a the light-emitting element (20), and where the light-emitting element (20), which has internal capacitance (21), is connected to the said exciter (10) so that the internal capacitance (21) serves as the passive output filter of the exciter (10).

EFFECT: design of a light-emitting device with smaller thickness.

10 cl, 9 dwg

FIELD: physics.

SUBSTANCE: fluorescent tube fitting device has a light-emitting diode element (4) which includes at least one electric starter element (4.1) connected to at least one phase conductor and also connected to at least one neutral wire at least through one conductor (4.2) having at least one light-emitting diode (4.3).

EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.

3 cl, 2 dwg

FIELD: mechanics, physics.

SUBSTANCE: device to excite electroluminescence consists of input unit connected in series with microprocessor unit, sinusoidal oscillation generator, amplitude-frequency response corrector, step-up transformer and exciting electrodes furnished with plates for the specimen to be placed there between. Note that the said exciting electrodes are optically coupled with the photo receiver connected with the ADC which, in its turn, is connected with the microprocessor unit. The latter is connected to the display unit and amplitude-frequency response corrector, while the sinusoidal oscillation generator is connected via a feedback loop with the microprocessor unit.

EFFECT: simpler design, smaller sizes, brightness correction in wide frequency range.

3 dwg

FIELD: mechanics, physics.

SUBSTANCE: device to excite electroluminescence consists of input unit connected in series with microprocessor unit, sinusoidal oscillation generator, amplitude-frequency response corrector, step-up transformer and exciting electrodes furnished with plates for the specimen to be placed there between. Note that the said exciting electrodes are optically coupled with the photo receiver connected with the ADC which, in its turn, is connected with the microprocessor unit. The latter is connected to the display unit and amplitude-frequency response corrector, while the sinusoidal oscillation generator is connected via a feedback loop with the microprocessor unit.

EFFECT: simpler design, smaller sizes, brightness correction in wide frequency range.

3 dwg

FIELD: physics.

SUBSTANCE: fluorescent tube fitting device has a light-emitting diode element (4) which includes at least one electric starter element (4.1) connected to at least one phase conductor and also connected to at least one neutral wire at least through one conductor (4.2) having at least one light-emitting diode (4.3).

EFFECT: reduced need to replace fluorescent tubes in fittings and reduced electrical power consumption.

3 cl, 2 dwg

FIELD: physics.

SUBSTANCE: invention relates to a light-emitting device (1) having an exciter (10) and a flat light-emitting element (20), where the exciter (10) is connected to a source (2) and a the light-emitting element (20), and where the light-emitting element (20), which has internal capacitance (21), is connected to the said exciter (10) so that the internal capacitance (21) serves as the passive output filter of the exciter (10).

EFFECT: design of a light-emitting device with smaller thickness.

10 cl, 9 dwg

FIELD: physics.

SUBSTANCE: proposed illuminator 10 built around LEds comprises assemblage of LED different-colour light sources 14 to produced mixed-colour light and LED source control device to control said sources in compliance with preset values. Note here that first control data are generated by, at least, one colour transducer 22. Illuminator differs from known designs in that its incorporates device 30, 32 designed to determine the temperature of each LED light source and device 26 to compensate for preset values in compliance with second control data including LED light source temperature.

EFFECT: higher stability of operation.

20 cl, 2 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention relates to a device for powering luminous elements, having an energy supply unit (12), a first luminous element (30), having a first colour, preferably white, a second and a third luminous element (34, 38), having a second and a third colour, preferably for adjusting the colour of the first luminous element, and a controlled switch (42), connected in series to the said third luminous element (38). Said serial connection from the said third luminous element (38) and said switch is connected in parallel to the said second luminous element (34). The energy supply device is characterised by that the said energy supply unit (12) has a third and a second output (20, 22). The said first luminous element (30) is connected to the said first lead (20) and the said second and third luminous elements (34, 38) are connected to the said second led (22), the said energy supply unit (12) is configured to provide controlled, preferably independently controlled, output signals on the said first and second leads (20, 22), and the said second and third luminous elements (34, 38) and the said energy supply unit (12) are configured in such a way that, the said third luminous element (38) emits light when the switch (42) is closed. The invention also relates to a method of powering the luminous elements.

EFFECT: fewer switches.

20 cl, 4 dwg

FIELD: physics.

SUBSTANCE: circuit (1) with light-emitting diodes is provided with first subcircuits, having first light-emitting diodes (11) and second subcircuits having second light-emitting diodes (13) and switches (14), in conducting states, for switching on the second light-emitting diodes (13) and switching off the first light-emitting diodes (11), and, in non-conducting states, for switching off the second light-emitting diodes (13) and switching on the first light-emitting diodes (11). Also, the first and second subcircuits have different signal characteristics, such as different minimum threshold voltage values, so as to be realised by different types of light-emitting diodes (11, 13) or using a different total number of serial light-emitting diodes (11, 13) or by adding elements with threshold voltage to the first subcircuits. The light-emitting diodes (11, 13) have different colours and can be used backlight.

EFFECT: simplification.

16 cl, 4 dwg

FIELD: physics.

SUBSTANCE: illumination device (1) comprises, for example, diodes LED (L1, L2, L3, L4) with separate emission spectra. Detectors D1, D2, D3, D4) can generate a vector of measurement signals (S1, S2, S3, S4) which represent light output of one active light emitter. Further, based on a linear relationship obtained during the calibration procedure, the characteristic value of the light output of that light emitter (L1, L2, L3, L4) is calculated using the measurement vector, wherein said characteristic value is based on the decomposition coefficient of an individual emission spectrum on basic functions.

EFFECT: improved method.

25 cl, 6 dwg

FIELD: physics.

SUBSTANCE: illumination system (100) comprises: a set (14) of lamps; a controller (115); a user input device (19); memory (120) which determines discrete colour points containing an ID table (121) of hue, an ID tale (122) of saturation, an ID table (123) of brightness and boundary memory (124) which determines the boundary of the colour space. Based on data (x1, x2, x3) received from the user input device and information in the memory, the controller generates colour control signals (ξ1, ξ2, ξ3) for the set of lamps. The controller compares user input data with information in the boundary memory. If the controller detects that the said point lies beyond the boundaries of the colour space, the controller calculates the replacement point on the boundary of the colour space which was determined in the boundary memory (124), and generates is control signals based on the replacement point.

EFFECT: reduced volume of memory space required.

3 cl, 3 dwg

FIELD: physics.

SUBSTANCE: switched array of light elements has first, second and third light-emitting elements and first and second switches. The first light-emitting element has first and second leads, and the second light-emitting element has a first lead and a second lead connected to the second lead of the first light-emitting element. The third light-emitting element has a first lead connected to the first lead of the first light-emitting element, and a second lead. The first switch has a first lead connected to the first leads of the first and third light-emitting elements, and a second lad connected to the first lead of the second light-emitting element. The second switch has a first lead connected to the second lead of the third light-emitting element, and a second lead connected to the second leads of the first and second light-emitting elements.

EFFECT: fewer circuit components.

13 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: matrix of luminous elements (100) includes the first (LEE1), the second (LEE2) and the third (LEE3) light-emitting elements and the first (140) and the second (150) controlled current sources. The first light-emitting element differs with the first operating voltage VOpi at which or over which it can essentially emit the light. The second light-emitting element includes the first output (120a) and the second output (120b) connected to the second output of the first light-emitting element; at that, the second light-emitting element differs with the second operating voltage Vop2. The third light-emitting element includes the first output (130a) connected to the first output (110a) of the first light-emitting element and the second output (130b); at that, the third light-emitting element differs with the third operating voltage Vop3. The first controlled current source is connected between the first output of the first light-emitting element and the first output (120b) of the second light-emitting element, and the second controlled current source is connected between the second output (110b) of the first light-emitting element and the second output of the third light-emitting element.

EFFECT: reducing the number of circuit components.

15 cl, 5 dwg

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