Switched array of light elements and method of operation

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

 

The technical field to which the invention relates

The present invention relates, generally, to devices that use light-emitting elements and, more particularly, to a matrix devices of the light elements and their actions.

The prior art inventions

Light-emitting elements of the 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 use LEDs of different colors, e.g., set in a matrix to create different colored paintings. The operating conditions of the led matrix can be as varied as the use of matrices such conditions, which require, for example, low power, high temperature operation and small times on and off the LEDs.

Typically, each sensor can receive power supply from the drive circuit capable of operating in one of several different startup modes depending on the desired lighting effect. The start circuit of the LEDs can be run in constant current mode, whereby led Halloween gift is Naya matrix is fed by a constant current to ensure constant light intensity. The start circuit of the LEDs may also operate in a mode changing current, whereby the led array is provided by changing the current to create varying intensities of light. The start circuit of the LEDs can also be used in mode pulse width modulation (PWM), whereby the led array is provided by the current in the PWM mode, in which the period of the PWM signal is determined by the period of time during which the led array is enabled, and thus, determines the light output and, thereby, the colored dot led matrix. PWM mode can be either constant current mode or in the mode of the alternating current to provide a combination of each of their attributes, i.e. constant or varying light intensity.

Unfortunately, to provide the above functionality, you need a large number of circuit elements. For example, in the constant current mode, when the desired mode with PWM, you usually need at least one current source for the led matrix and one switch for each led in the matrix. When the desired mode of the alternating current, requires a complex source, able to work under rapidly changing current levels. In case, whenin the mode of the alternating current is desired mode of operation PWM, usually requires a complex current source and one switch for each led in the matrix.

A large number of parts for operation and control led matrix degrades performance LEDs for many reasons, because each component increases the energy consumption of the led matrix and contributes to parasitic effects, which affect the reduction of the times of turning on and off LEDs. In addition, when the led array is used for operation at high temperature, each component will be required nominal parameters at high temperatures, ability, additionally increases the cost of each required component. Confirmation of the problems associated with a large number of details of the schemes run LEDs, can be seen in U.S. patent No. 5 736 881 issued Ortiz, revealing the start circuit of the led with PWM and the configuration of the led matrix, which uses a single current source to control multiple led strings.

The invention

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

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

In one embodiment, the invention provides a matrix of light elements, containing the first, second and third light emitting elements and the first and second switches. The first light-emitting element includes the first and second conclusions. The second light-emitting element includes the first output and the second pins, connected to the second output of the first light-emitting element. The third luminous element has a first output connected to the first output of the first light-emitting element, and a second output. The first switch includes a first output connected to each first output of the first and third light emitting elements, and a second output connected to the first output of the second light-emitting element. The second switch includes a first output connected to the second output of the third light-emitting element, and a second output connected to the second findings of the first and second light emitting elements.

In another embodiment, the invention presents a light-emitting device that contains a matrix of light elements, as described above, and here, the power source and the controller. The power supply comprises a control input and a power output connected to supply current to the matrix of light elements. The controller contains the first o is d, connected to the control input of the power source, a second output connected to the first switch matrix of light elements, and a third output connected to the second switch matrix of light elements, the first output configured to provide the control signal to the power source, to set the output level of the power source and a second output configured to provide the control signal to control the state of the first switch, and a third output configured to provide the control signal to control the state of the second switch.

In an additional embodiment, the invention presents a method of operation of a matrix of light elements, the matrix of light elements described above and here, the method containing the switching operations of the first light-emitting element, which includes the management of each of the first and second switches to switch in open position or in the closed state and the supply current for a matrix of light elements. At least part of the supplied current is served on: (i) the first light-emitting element when both the first and second switches are in open state, (ii) the second light-emitting cell battery (included) is that, when the first switch is closed and the second switch is in open condition, and (iii) a third light-emitting element when the first switch is in the open state and the second switch is closed.

As the essence of the variant example of implementation of the present invention it may be noted that the embodiment of the present invention implements the light-emitting elements having different points operating voltage (i.e. direct voltage for LEDs)to reduce the number of switches below 1:1-relation of the number of switches among the light-emitting elements, for example, providing one switch for two light-emitting elements, the two switches for the three light-emitting elements or the two switches for the four light-emitting elements. In this way the number of components for a matrix of light elements can be reduced, providing a faster, more energy efficient and cheaper light-emitting device.

Below are examples of the features and improvements of a matrix of light elements, although these features and improvements can also be applied to a light-emitting device and method of action of a matrix of light elements. In one variant the first and second findings of the first lighting element connected to the first and second busbars of the power supply. Additionally, first, second and third light emitting elements are respective first, second and third working voltage Vop1Vop2Vop3the relative ratio between which is defined so that when the first switch is closed and the second switch is in the open state, the second light-emitting element is able to consume at least part of the current supplied through the bus power supply. The above-mentioned ratio is additionally determined in such a way that when the first switch is in the open state and the second switch is closed, the third light-emitting element is designed with the ability to consume at least part of the current supplied through the bus power supply. In a specific embodiment, the relationship between the first, second and third working voltage is defined asVop1>Vop2,Vop3. Such installation of operating voltages allows you to choose between different light-emitting elements.

In an additional embodiment, the matrix of light elements has a fourth light-emitting element having a first output connected to the second output of the first switch and the second output podkluchen the second to the first output of the second switch, the fourth light emitting element, characterized by a fourth operating voltage Vop4at which or above which the fourth light-emitting element capable of emitting light. In a specific embodiment, the fourth light-emitting element is designed with the ability to consume at least part of the current applied to the matrix of light elements when the first and second switches are in closed condition. Additionally specifying first, second, third and fourth operating voltage (Vop1Vop2Vop3Vop4) is determined by the equation:

Vop1>Vop2>Vop3>Vop4.

In an additional embodiment, the first, second, third or fourth (when available) light-emitting elements are selected from the group consisting of LEDs, organic LEDs, led, AC, laser diode or incandescent bulbs. Additionally, the cumulative element such as a capacitor, may be connected to one or more of the first, second, third, or fourth (when available) light-emitting elements. Cumulative element can be used to increase the duration of illumination of one or more light-emitting elements or permit the simultaneous illumination of the TLD is or more light-emitting elements.

In an additional embodiment, the fourth light-emitting element (when present) contains at least one led, and at the same time, additionally, the first, second and third light emitting elements contain at least one additional led, as in the fourth light-emitting element, or made of a different semiconductor material than the at least one led contained in the fourth light emitting element. Such a device may be used to provide a lower operating voltage to the fourth light emitting element.

The following are examples of the features and improvements of the method for operation of a matrix of light elements, although these features and enhancements will be applied to the matrix of light elements, and the light-emitting device. In an additional embodiment, the currents supplied to the first, second, third and fourth light-emitting elements are average currents determined in accordance with the equation:

whereIiis the amplitude of the current available for the selected i-th light-emitting element,T- time period supply current to the i-th light-emitting element and thetiactivation period during which the first and the second switch is cutely located in their respective States, providing a supply currentIifor the i-th light-emitting element.

The stages corresponding to the above-described methods may be implemented by a computer program, i.e. by software, or by using one or more special electronic circuits/circuit optimization, i.e. hardware, software, or in combinations form/built-in software, i.e. software components and hardware components software. The computer program may be implemented as machine-readable code commands in any appropriate programming language, such as, for example, VHDL, Assembler, JAVA, C++, and may be stored on machine-readable medium (removable disk, volatile and non-volatile memory built-in memory/CPU etc), the code of instructions executed by programmable computer or other programmable device to perform the assigned functions. The computer program may be available from the network, such as the WorldWideWeb, from which it can be unloaded.

These and other aspects of the present invention will become apparent and will be 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, soo is relevant to the present invention.

Figa - additional variant example of implementation of the matrix of light elements corresponding to the present invention.

Figw - additional variant example of implementation of the matrix of light elements corresponding to the present invention.

Figs - additional variant example of implementation of the matrix of light elements corresponding to the present invention.

Figure 3 - way action of a matrix of light elements, shown in figure 1, and the corresponding state table corresponding to the present invention.

Figa - way matrix of light elements, shown in figa, and the corresponding state table corresponding to the present invention.

Figw - way matrix of light elements, shown in figv, and the corresponding state table corresponding to the present invention.

5 is a light-emitting device containing a matrix of light elements 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 the first light-emitting element (LEE) 110 having a first output 1l0a, and the second output 1l0b, the second LEE 120, having a first output 120a and the second you are the od 120b, connected to the second output 1l0b the first LEE 110, and the switch 130, which has a first output 130a connected to the first output 1l0a the first LEE 110, and a second output 130b connected to the first output 120a of the second LEE 120. The term "light emitting element" or "LEE"as used here, refers to any light-emitting element, scheme, device or component, such as a light emitting diode (LED), organic light-emitting diodes (OLED), LEDs AC, laser diodes, or any other lighting element, such as a light bulb, etc.

The first output of the switch 130 and the first output of the first LEE 110 is typically connected to the primary bus 172 of the power supply, and main conclusions of the first and second LEE are connected to the second bus 174 power. In a specific embodiment of the invention, further shown below, the current ISUPPLYserved on the matrix 100 on tires power.

Additionally, as an option, the matrix contains 100 cumulative element connected to receive energy from the bus power supply and provide power to one or more LEE 110 and 120. In the example shown variant of implementation, the capacitor 160 is connected to the first LEE 110, with the parallel connection of the capacitor 160 to LEE 110, connected in series with the separation element 162. Dividing element 162 can be implemented as non-emitting led, for example, a Schottky diode with a low forward voltage drop. Alternatively, you can use light-emitting element. The purpose of the separation element 162 is to prevent discharge of the capacitor 160 in the switch-on time of the second LEE 120. The capacitor 160 is configured to supply power to the first LEE 110 during periods when the switch 130 is closed. In another embodiment, the cumulative element 160 may be an inductor, connected in series with LEE 110 and/or 120.

In a specific embodiment of the invention the first and second LEE 110 and 120, essentially, with the opportunity to work in various modes of displacement, for example at different operating voltages. Specifically, the first LEE 110 is characterized by a first voltage at which or above which the first LEE 110, essentially, able to emit light. Similarly, the second LEE 120 is characterized by a second voltage at which or above which LEE 120, essentially, able to emit light. The ratio between the first and second working voltage VOP1and VOP2can be used to provide selective when LEE 110 and/or LEE 120. Specifically, the ratio between the first and second working voltage VOP1and VOP2can be defined such that the second LEE 120 made with the possibility of consumption,at least part of the energy provided for the matrix 100 on tires 172 and 174 of the power source when the first switch 130 is in the closed position. In the private embodiment, the first operating voltage VOP1higher than the second operating voltage VOP2.

In one example case for LEE 110 and 120 are diagrams, each of which contains at least one led. In this embodiment, each LEE 110, 120 may use a variety (i.e. 2, 3, 5, 10, or more) of series-connected diodes connected in parallel diodes or combinations of series and parallel connected diodes. Additionally, for the manufacture of LEDs may be used various materials, such as gallium nitride, gallium phosphide, or other materials.

In one embodiment of the invention, the first operating voltage VOP1the first LEE 110 is greater than the second operating voltage VOP2LEE 120 second. This difference in operating voltages may be accomplished by many means. For example, in the embodiment, in which LEE 110 and 120 are led schemes and LEE 110 has a higher operating voltage than LEE 120, the first led circuit 110 may include at least one serially connected led compared with the second LEDs is weddidng circuit 120. In another example, for the manufacture of LEDs in the first led circuit 110 can be used in other semiconductor materials and/or processes to produce LEDs in the first led circuit 110 and to have the LEDs with a higher forward voltage compared to the forward voltage of the LEDs in the second led circuit 120. In another example, additional circuit components (resistor divider, diodes, etc. may be used to provide the first led circuit 110 higher direct voltage in comparison with the second led circuit 120. Experts in the art should understand that in order to ensure a higher forward voltage to the first led circuit 110 in comparison with the second led circuit 120 can be used many ways.

On figa shows an additional example of a matrix 200a light elements corresponding to the present invention, with the previously described feature, retaining their reference number. In this embodiment, the matrix 200a includes a third LEE 210 and the second switch 230.

Third LEE contains the first and second conclusions 210a and 210b, the first output 210a connected to a common node that contains the first conclusion 1l0a the first LEE 110 and the first output 130a of the first switch 130. The second will switch the l 230 contains the first output 230a, connected to the second output of the third LEE 210, and a second output 230V, connected to the second findings of the first and second LEE 110 and 120 and the second bus 174 power supply source.

The third LEE 210 is characterized by a third operating voltage (VOP3)at which or above which the third LEE 210, essentially, able to emit light. The ratio between the first, second and third working voltage VOP1VOP2VOP3can be used to ensure the chosen LEE 110, 120 and 210. Specifically, the ratio between the first, second and third working voltage VOP1VOP2VOP3may be determined so that the second light emitting element 120 is performed with the consumption of at least some of the energy provided for the matrix 200a on tires 172 and 174 of the power source when the first switch 130 is in the closed position, and the second switch 230 is in the open position, the third light-emitting element 210 is performed with the consumption of at least some of the energy supplied to the matrix 200a light elements on tires 172 and 174 of the power source when the first switch 130 is in the open position and the second switch 230 is in the closed position.

More specifically, the ratio between the lane is haunted, the second and third working stresses can be determined such that the second and third LEE 120 and 210 are performed with consumption, essentially all the energy supplied to the matrix during their respective inclusion with the above-mentioned units of the first and second switches.

In a specific embodiment, the above-mentioned ratios operating voltage operating voltage VOP1corresponding to the first LEE 110, has the highest value of the operating voltage, resulting in the following relationship:

VOP1>VOP2VOP3.

As explained above, the operating voltage of the first and second LEE VOP1and VOP2can be selected in such a way that when the first switch is closed and the second switch is open, the second LEE 120 consumes at least some current (supply current in this case is divided with the first LEE 110), and in a particular embodiment, essentially all of the supply current ISUPPLYwhen , for example, VOP2<<VOP1. Additionally for example, the ratio between the first and third working voltage VOP1and VOP3can be such that when the first switch is open and the second switch is closed, the third LEE 210 consumes at least some portion of the supplied current (supply current may partition is imago with the first LEE 110) and in a specific embodiment, the third LEE 210 consumes, essentially, the entire supply current when, for example, VOP3<<VOP1.

In previous versions the implementation uses three of the four possible switching conditions. Matrix management 200a may be provided in such a way as to avoid operation in the fourth state in which both the first and second switches 130 and 230 are closed. Alternatively, the fourth switching status can be used as an option when the current applied to the first, second and third LEE 110, 120 and 210, is determined by the respective working voltage LEE. For example, each of the three LEE can consume essentially the same part of the current, when these three working voltage, essentially, are the same. In an additional example, the above-mentioned state, in which VOP1>>VOP2VOP3the first LEE 110 will consume the least (if any) of the supply current, and part of the supply current supplied to the second and third LEE, will depend on the ratio between their respective working stresses. For example, if VOP1>>VOP2≈VOP3then the second and third 120 and 210 will consume essentially the same supply currents, when the first LEE 110, consuming small, if any, portion of the supply current. Additionally, for example, if VOP1>>VOP2>VOP3, what about the third LEE 210 will consume the largest part (and perhaps all) of the supply current, the second LEE 120 will consume a smaller part (and possibly no) supply current, and the first LEE 110 will consume the smallest part (and, possible, no) supply current. Accordingly, a specific value of current can be provided to any one or more of LEE through the exhibition of operating voltages accordingly.

Similarly, the matrix 100 shown in figure 1, the matrix 200a may optionally contain one or more of the cumulative elements connected to receive power from the bus power supply and providing power to one or more LEE 110, 120 and 210. In the example shown variant of implementation, the capacitor 160 is connected to the first LEE 110, the parallel connected capacitor 160 and LEE 110 are connected in series with a dividing element 162. Dividing element 162 may be implemented as a non-emitting diode such as a Schottky diode with a low forward voltage drop. Alternatively, you can also use light-emitting element. The purpose of the separation element 162 should be to prevent discharge of the capacitor 160 during start-up, LEE 120 or 210. The capacitor 160 is configured to provide the power for the first LEE 110 during periods when one or both switches 130 and 230 are closed. In another variant implementation, the value of the cumulative element 160 may be an inductor, connected in series with LEE 110, 120 and/or 210.

On FIGU shows an additional variant example of implementation of the matrix 200b light elements corresponding to the present invention, with previously identified features retaining their reference designations. First, second and third LEE 110, 120 and 210 and the switches 130 and 230 are connected and described above in accordance with Figo, and the fourth LEE 220 is connected between the second output of the second switch 130 and the first output of the second switch 230, the fourth LEE 220, characterized by the operating voltage at which or above which it will be, essentially, to work, radiating light.

The current applied to the fourth LEE 220 in the fourth state of the switch (when the first and second switches are in a closed position), will depend on the correlations with the other three working voltage VOP1VOP2and VOP3. Continuing using the previous example, in which the first operating voltage VOP1is the most high, VOP1>>VOP4current supplied to the fourth LEE in the fourth state of the switch will depend on the relationship VOP4to VOP2and VOP3. For example, if VOP1>>VOP2≈VOP3≈VOP4the second , third and fourth LEE will consume essentially the same part of the supply current, and the first LEE 110 will receive less if at all will consume part of the supply current. Working voltage can be selected so that the fourth LEE 220 will consume most, if not all, of the supplied current, for example, when VOP1>>VOP2,VOP3>>VOP4. Thus, installation of operating voltages can be made to ensure that the distribution mains in the desired proportions to the first, second, third and fourth LEE 110, 120, 210 and 220.

Specialist in the art should understand that LEE can contain the elements described above with reference to figa. For example, any one or more of the LEE 110, 120, 210 and 220, shown in figa, can be connected to a storage element provided in one embodiment as connected in parallel to the capacitor (and the accompanying separation element 162), as described and shown above.

Matrix 200b to the first, second, third and fourth LEE 110, 120, 210 and 220 can be modified to have fewer LEE, for example three LEE, excluding the second, third or fourth LEE 120, 210 or 220. In a specific embodiment, excluded the fourth LEE 220 that results in the matrix 200a shown in figa.

On figs shows an additional example of a matrix 200c light elements corresponding to the invention, in which previously described the major characteristics retain their reference designations. First, second and third LEE 110, 120 and 210 and the switches 130 and 230 are connected and described, as shown above on figa, and between the second output of the second switch 130 and the first output of the second switch 230 connects coreconnection. This configuration may be used to provide three-element of the matrix (for example, as shown in figa), in which the fourth switch is used as the switching state of the matrix 200.

Figure 3 shows an example of the mode of action of the matrix 100 light elements, shown in figure 1, and the corresponding table 350 of States corresponding to the present invention, and in the absence of cumulative elements, such as connected in parallel to the capacitors 160. The method 300 includes a step 312 is installed on the supply current ISUPPLYand step 314, at which the decision whether the amount of current applied to the second LEE 120, to allow him to emit light. At step 316, the switch 130 can be installed as either open or closed, depending on whether LEE 120 to emit light; switch 130 is translated in open position, if LEE 120 should not consume supply current, or switch 130 is translated in the closed state, if LEE 120 must be submitted at least some current to emit light.

Current ISUPPLYby setting aemy at step 312, can provide a constant level of current or modulated, time-varying level. If the matrix 100 is to operate in the state "0", in which the first LEE 110 emits light, the switch 130 is translated in open position. Current ISUPPLYwill be supplied to the first LEE 110, which thus emits light with the assigned intensity. Since the switch 130 is open, for the second LEE 120 no current is not available and, accordingly, no light im not emitted.

If the matrix 100 should operate in the "1"state, in which the second LEE 120 consumes at least some current to emit light, switch means in a closed position. Depending on the operating voltages of the first and second LEE 110 and 120 current may pass through one or both LEE 110 and 120. In a specific embodiment of the invention operating voltage LEE 110 and LEE 120 are defined in such a way that through LEE 120 passes, at least a portion of the supply current ISUPPLY. Such a scheme may be implemented, for example, using the schema in which the second LEE 120 has an operating voltage that is less than or equal to the operating voltage of the first LEE 110.

In another embodiment, the steps 312-316 are performed in such a way that, essentially, all provide the current ISUPPLYfor a matrix is supplied to the second LEE 120. This scheme can is tons to be done, using, for example, the above-mentioned method of formation of the second LEE 120 to be substantially lower operating voltage and/or voltage limiting provide current ISUPPLYsufficiently greater than the operating voltage of the second LEE 120 and quite low compared to the operating voltage of the first LEE 110.

The average current supplied to LEE, may also be calculated for a periodic sequence of circuit-breaking switch 130. In particular, the currents I1and I2provided for LEE 110 and LEE 120, can be defined as follows:

whereis the average current, which must be fed to the i-th LEE, so LEE could reach:

required from the LEE of the level of light intensity;

Iithe amplitude of the current provided to the i-th LEE;

T- time period supply current to the i-th LEE;

ti- part time within a period ofTduring which the currentIserved on the i-th LEE.

In the specific embodiment shown in figure 1,tifor "1" is the time during which the switch 130 is maintained in a closed state, resulting in the average current, submitted to the second LEE 120, so that he could work at the required level of illumination. This approach to ensuring renego current value, based on duration of the switching conditions, hereinafter described and shown in figa and 4B to embodiments of the matrices shown in figa and 2B.

The amplitude of the currentIiis the level of current that is available to supply selected LEE during the activation periodti. In one embodiment, in which only a selected LEE passes the current applied to the matrix, the amplitude of the currentIiwill be, essentially, the full amplitude of the current ISUPPLYprovided for the matrix 100. In another embodiment, in which one or more of the uninvolved LEE consume current, the supply current ISUPPLYwill share, resulting in a current smaller than the ISUPPLYavailable for consumption included LEE. Accordingly, the amplitude of the currentIiin the equation above represents the current amplitude, which is available for LEE when it is turned on by the switch matrix. Experts in the art should understand that for LEE, consume energy when they are not included, the average current is the sum of all the currents consumed during time periods are included and those that are not States.

Alternatively, the current ISUPPLYitself may be changing current, for example a signal with pulse width modulation (PWM)to provide to the specific current value for the desired LEE 110 or 120, the switch 130 may be configured to determine which of the LEE 110 or 120 should be provided by the current. For example, when the switch 130 is in the open state, current may be supplied only to the first LEE 110. When the switch 130 is closed, current may be served on the first and second LEE 110 and 120.

If both LEE 110 and 120 must be turned off, current is provided for the matrix 100 is interrupted. This can be done by setting the current to zero at step 312. In this state, LEE 110 and LEE 120 will not emit light. In an alternative embodiment, the second led circuit 120 may be replaced by coreconnection, so that the state of "1" is included, so as not to provide any light output for led matrix 100. Specialist in the art should understand that the steps 312, 314 and 316 may be performed in any order and/or one or more of the steps may be performed simultaneously.

Table 350 States shows the switching status, the status of switches and included LEE in accordance with one specific embodiment of the invention, in which the operating voltage is selected so that after LEE 120 passes, essentially, the entire current supplied to the power bus when the switch 130 is closed, and in which no cumulative element 10 is not used. As shown in the drawing, in the state "0" the switch 130 is in the open state and the first LEE 110 is enabled for the current consumption, the current, which is the supply current ISUPPLYin one embodiment. In the state "1" the switch 130 is closed and in the specific embodiment shown in the drawing, LEE 120 is included on the current consumption, which in the variant example of implementation is, essentially, the entire supply current ISUPPLY. As explained above, the working voltage VOP1and VOP2can be provided so that LEE 110 and LEE 120 provide specific order of inclusions/off, shown on the drawing for the variant of realization of the state of "1"representing the above-mentioned case in which VOP2significantly lower than VOP1and/or provide the current ISUPPLYlimited to voltage, which is greater than VOP2and enough below VOP1. Alternatively, the operating point voltage can be changed to allow simultaneous operation/emission of light as LEE 110, and LEE 120 in the state "1", for example, by providing the first and second LEE 110 and 120 similar working voltage VOP1and VOP2.

On figa shows how 410 matrix 200a light elements shown in figa, and meet the General table 420 States, corresponding to the present invention. Initially, at step 411 sets the level of current ISUPPLYthat should be served for a matrix of light elements. At step 412 determines which LEE 110, 120 and 210 should be included. If should be included LEE 110 to emit light, the process continues at step 413, which both switches 130 and 230 are transferred to the open state (or remains in the open state, if they were already in it). Power is supplied to the first LEE 110, which begins to emit light with an assigned level of intensity.

If the matrix 200a should work in the state of "01"in which the third LEE 210 emits light, the process continues at step 414, for which the first switch 130 is translated in open position, and the second switch 230 is translated in a closed state. Power is supplied to the third LEE 210, which begins to emit light with an assigned level of intensity.

If the matrix 200a should work in the state of "10"in which the second LEE 120 emits light, the process continues at step 415, for which the first switch 130 is translated in the closed state and the second switch 230 is translated in open position. Current is supplied to the second LEE 120, which begins to emit light with an assigned level of intensity.

The supply current ISUPPLYmay be provided as the permanent current or a modulated current. In the last example, the supply current ISUPPLYmay be in the form of a signal with pulse width modulation (PWM)to provide a certain amount of current desired LEE 110, 120, 210, which switches 130 and 230 are made with a choice of which of LEE 110, 120, 210 must be made current. Working voltage LEE 110, 120 and 210 are determined so that the choice between LEE can be performed by setting the above-mentioned switching conditions.

In an additional variant example of implementation, the currents are provided with appropriate LEE as the average currents described above with reference to figure 3. In particular, step 413 supply current to the first light emitting element 110 includes the operation of a provision of secondary current to the first light emitting element 110:

whereI1the amplitude of the current, available for the first LEE 110,T- time period supply current to the first LEE 110 andt1activation period within a time period ofTduring which the first and second switches 130 and 230 are in the open state, to supply currentI1for the first LEE 110. The amplitude of the currentI1may be different (but not necessarily) from the amplitude of the supply current ISUPPLYfor example, when one or more uninvolved LEE consume. Accordingly, the amplitude of the currentI1 in the equation above represents the current available for the first LEE 110 when activated, switches matrix.

Similarly, step 414 supply current for the second LEE 120 may include the operation of supply average current to the second light emitting element 120:

whereI2the amplitude of the current that is available for the second LEE 120,T- time period applying current to the second LEE 120 andt2activation period within the period of timeTduring which the first switch 130 is closed and the second switch 230 is in the open state, to supply currentI2on the second LEE 120.

Similarly, step 415 supply current to the third LEE 210 may include the operation of supply average current to the third light-emitting element 210:

whereI3the amplitude of the current that is available for the third LEE 210,T- time period supply current to the third LEE 210 andt3activation period within a time period ofTduring which the first switch 130 is in the open state and the second switch 230 is closed, the feeding currentI3on the third LEE 210.

Table 420 States shows the switching status, the status of switches and enabled LEE to correspond with the AI with one specific embodiment of the invention, where to LEE 110, LEE 120 or LEE 210 is current and in which no savings element 160 is not used. As shown in the drawing, in the state of "00" switches 130 and 230 are in the open state, and the first LEE 110 is connected so as to consume the current. In the state of "01", the first switch 130 is in the open position and the second switch 230 is in the closed position, due to which the third LEE 210 consumes current for operation at the assigned level of light intensity. In the state of "10" of the first switch 130 is in the closed position and the second switch 230 is in the open position, thereby the second LEE 120 consumes current for operation at the assigned level of light intensity.

As explained above, the working voltage VOP1VOP2and VOP3can be provided such that LEE 110, LEE, 120 and LEE 210 provide specific order of inclusions/off. In the above embodiment, in which the state "01" results in the fact that, essentially, the entire supply current ISUPPLYserved on the third LEE 210, VOP3significantly lower than VOP1and/or supply current ISUPPLYlimited to voltage, which is greater than VOP3and enough below VOP1. Similarly, in the embodiment, in which the state "10", resulting in resultaten to that, essentially, the whole of the supply current ISUPPLYis provided for the second LEE 120, VOP2significantly lower than VOP1and/or supply current ISUPPLYlimited to voltage, which is greater than VOP2and enough below VOP1.

Alternatively, the operating point voltage VOP1VOP2and VOP3can be modified to allow simultaneous operation/emission of light from LEE 110 and LEE 120 or from LEE 110 and LEE 210. For example, the first and third LEE 110 and 210 may consume current during operation in the state of "01", for example, in General, in the same proportions when their corresponding operating voltage VOP1and VOP3close, or in a different proportion, determined in accordance with the ratio between their work stress. Similarly, the first and second LEE 110 and 120 may consume current during operation in the state of "10", for example, in General, in the same proportions when their corresponding operating voltage VOP1and VOP2close, or in a different proportion, determined in accordance with the ratio between their work stress.

As explained above, the matrix in the fourth possible state when the first and second switches 130 and 230 are closed, may be excluded by the controller matrix (not shown). In yet another embodiment, ensure the value of the current I SUPPLYfor the matrix may be terminated if the matrix operates in the fourth switching status.

In an additional example can be used in the fourth switching state, in which the current applied to the first, second and third LEE 110, 120, or 210, is determined by the respective working voltage LEE. For example, each of the three LEE can consume essentially the same part of the current, when the three operating voltage is essentially the same. In the example described above, the condition VOP1>>VOP2VOP3the first LEE 110 will consume the least (if at all consumes) supply current, a part of the supply current supplied to the first and second LEE 120 and 210, will depend on the ratio between their respective working stresses. For example, if VOP1>>VOP2≈VOP3then as the second and third LEE 120 and 210 consume essentially the same part of the supply current, while the first LEE 110 consumes a small, if any, consumes part of the supply current. In an additional example, if VOP1>>VOP2>VOP3then the third LEE 210 will consume the largest portion (and possibly all) of the supply current, the second LEE 120 consumes a smaller part (and possibly none) of the supply current, and the first LEE 110 will consume the smaller part (and possibly none) of the supply current. Sootvetstvenno is, current specific value can be any one or more of LEE by setting the operating voltages accordingly.

On FIGU shows how 430 matrix 200b light elements having a fourth LEE 220, as shown in figv, and the corresponding table 450 of States corresponding to the present invention, with previously identified features retaining their reference designations. As shown in the block diagram 430 sequence of operations of the method, the previous stages of the supply current to the first, second and third LLE 110, 120 and 210 are the same as described above. In this embodiment, the method steps includes an additional step 432, whereby, if the fourth LEE 220 must be enabled, turns on the fourth state of "11"in which the first and second switches 130 and 230 are closed. Power is supplied to the fourth LEE 220, which begins to emit light with the assigned level of intensity.

Step 442 a current to the fourth LEE 220 may include the operation of supply average current at the fourth light-emitting element 220:

whereI4the amplitude of the current available for the fourth LEE 220,T- time period supply current for the fourth LEE 120 andt4activation period within a time period ofT/i> during which the first and second switches 130 and 230 are both closed to apply currentI4on the fourth LEE 220.

As described previously, the current supplied to the fourth LEE 220 in the fourth state of the switching matrix shown in figv will depend on its relationship with the other three working voltage VOP2and VOP3. Referring to the previous example, in which the first operating voltage VOP1is the most high, VOP1>>VOP4then the current supplied to the fourth LEE in the fourth state of the switch will depend on the relationship VOP4to VOP2and VOP3. For example, if VOP1>>VOP2≈VOP3≈VOP4each of the second, third and fourth LEE 120, 210 and 220 will consume essentially the same part of the supply current, while the first LEE 110 consumes less, if any, portion of the supply current. Working voltage can be set so that the fourth LEE 220 will consume most, if not all, of the supply current, for example, when VOP1>>VOP2VOP3>>VOP4. In this way, installation of operating voltages can be made so that, when the matrix operates in the fourth state of the switch, to allow essentially to serve the whole of the supply current ISUPPLYon the fourth LEE 220.

Figure 5 pok the connected light emitting device 500, containing matrix 100 or 200a, 200b, 200c light elements, shown in figure 1, 2A, 2B or 2C, corresponding to the present invention, with previously described features, retaining their reference designations. Figure 5 shows the implementation of the matrix 200b shown in figv, although the specialist in the art should understand that in the light-emitting device 500 alternative can be used in the matrix 100 shown in figure 1, or matrix 200B or 200c shown in figa and 2C, respectively.

In addition to the matrix 200b, the light emitting device 500 further comprises a power supply 510. The power supply 510 contains the input 510A model power, control input 510b and current output 510c connected (directly or via a switch) to the matrix 200b. Enter 510A model power made with the possibility of receiving power (stabilized or unstabilized), which should be provided for the matrix 200b. Control input 510b is configured to set parameters of the output level, as will be described below. Current output 510c is arranged to supply current power supply ISUPPLYthe matrix 200. In a particular embodiment, the power supply 510 is executed in the opportunity to work as a constant current source, whereby the supply current ISUPPLYfed, what about the fact, regardless of load conditions.

Led device 500 further comprises a controller 520, configured to provide control signals to the power source 510 and the first and second switches 130 and 230. The controller 520 includes the first output 520a, connected to the control input 510A model power supply 510, and the second output 520b connected to the switch 130. The first output 520a is arranged to provide the control signal 522 to a power source, to set the output level of the power supply. The second output 520b is arranged to provide the control signal 524 to control the state of the first switch 130. In the form shown in the drawing, the embodiment that implements matrix 200b shown in figv, the controller 520 further comprises a third output 520c connected to the second switch 230, the third output 520c, configured to provide the control signal 526 to control the state of the second switch 230. The controller includes an input port at the point 520d made with the possibility of receiving commands from a microprocessor or other system. Alternatively, the controller 520 may be loaded by a program executed with the ability to execute commands as described here.

As due in order to understand the specialists in this field of technology source 510 current/power can be controlled to provide a variety of different output signals to activate and/or deactivate LEE 110, 120, 210 and 220. For example, to get the solid light-emitting elements of the scheme, the controller 520 may be configured to provide the control signal 522, giving the command to the source 510 of the power supply supplies a constant current circuit LEE, who should be on. The controller 520 may additionally signal 524 and 526 controls to set the switches 130 and 230 so as to apply a constant current to the desired LEE in accordance with table 350 or 450, as described above. Similarly, the source 510 power supply can be controlled to change the output current ISUPPLYto perform changes in the intensity or brightness LEE. In another embodiment, the current applied to each of LEE 110, 120, 210 and 220, is a form of average currentidescribed above in figure 3, 4A and 4B. In one example of such case for a period of timeTequal to 10 MS, and times, includingt1t2t3andt4equal to 5 MS, 2 MS, 2 MS and 1 MS, respectively. This setup results in an average currentI1,2,3,4first, second, third and fourth LEE, equal to 50%, 20%, 20% and 10% of the t level supply current I SUPPLYaccepting that there is no significant difference between the currentIi,available for on LEE, and the supply current ISUPPLY(that there is no significant consumption not included LEE does not occur). Experts in the art should understand that there can be obtained various relationships currents, depending on the desired amount of current which must be supplied on specific LEE. For example, the period of time T may be selected so as to avoid human perception of flicker, which can be selected over a short period of time (for example, 2.5 MS). In addition, the switching timetican also be modified appropriately to preserve the percentage of current ISUPPLY.

Additionally it should be noted that the level of the supply current ISUPPLYcan be provided with a constant level or, alternatively, with the changing level. Combining different States to include LEE with changes in the level of supply current, allows you to have two essentially independent degrees of freedom in the management of LEE.

In an additional variant example of implementation of the matrix 200b uses a shunt capacitor(s)connected to one or more schemes LEE 110, 120, 210 and 220 (scheme LEE 120 shows a shunt capacitor 160 figure 5, although W is tiraumea capacitors may use some or all of LEE), matrix 200b, working to serve the average currentIion the corresponding LEE 110, 120, 210 and 220, as in the example above, in which the average currentsI1,2,3,4served for 5 MS, 2 MS, 2 MS and 1 MS, respectively, for a period of timeT,equal to 10 MS. Parallel connection of the capacitors to one or more of LEE may 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 case occurs, for example, when a previously uninvolved LEE switches to the consumption of its correspondingIiand the second LEE is disconnected from the power source and then a shunt capacitor of the second LEE supplies current to run your LEE for continuous operation.

The size of the capacitors 160 (each of which may be the same or different) is based on several factors, including the period of time T currentisupplied connected to LEE, and duration of operation off", and "disable operation" refers to the state in which the accumulated charge is connected to the capacitor 160 provides the corresponding LEE after the switches 130 and 230 off LEE from the power supply. How should the be clear smaller capacitors can be used when the currenticontains over a short period of time and/or when the activation time off shorter and/or when desirable or acceptable to the large value of the ripplei. Large capacity can be used in cases when due to the currentiensures longer period of timeTand/or when you want a longer run time off and/or when desired or required, the smaller the magnitude of the ripple toi.

Another factor possibly influencing the choice of the size of the capacitor(s) 160, an acceptable delay when turning on and off led circuits using shunt capacitor 160. In particular, the size of the capacitor 160 may hinder how quickly already included led scheme will be able to achieve the state of their working voltage VOPor how fast already included LEE can be turned off. Under such circumstances, the rise and fall transients between disabled and enabled States supply average currentican deteriorate beyond acceptable limits, causing some of the safety Deposit box the circumstances to erroneous emission of light (slow off led schemes) and/or to pass the light in other circumstances (slow inclusion LEE).

One example of an approach to minimize the effects of delay on/off, which shunt capacitor(s) 160 has connected thereto LEE, is to provide an intermittent effect compensation for faster rise time and fall transient. For example, the rise time for the transition is already enabled LEE to the operating 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 rather reaching forward voltage than when the desired level of currentIiconstant over timetwhen a particular schema LEE included. Due to certain current-voltage characteristics of a particular LEE, for example, LEDs that can be used as a light-emitting element, at a lower direct voltage initial current may fall. Discharge capacitor by supplying energy to the led can result in a longer period of time during which the led will give only a very weak, but visible light. For faster final off diode can be used to connect additional load with the appropriate characteristics (e.g., a resistor or a chain of after batelling connection of the resistor and Zener diode). In addition, the controller 520 may be programmed in such a way as to compensate for the absence or additional light output from the led with a shunt capacitor and can be compensated for by averaging light output over time.

Thus, as one aspect of the present invention can be considered that schemes LEE, having different points operating voltage (i.e. the voltage of the power)are used to reduce the ratio of the number of switches to the number of light-emitting elements below 1:1, for example, providing one switch for two light-emitting elements, the two switches for the three light-emitting elements or the two switches for the four light-emitting elements. In this way the number of components in the matrix of light elements can be reduced, providing a faster, more energy efficient and cheaper light-emitting device.

How easy it must be understood by the experts in the art, the described processes can be carried out associated with the hardware, software, firmware, or a combination of these embodiments, depending on the situation. In addition, some or all of the described processes can be implemented as com read what uterum set of commands, the ever-present on the machine-readable medium (removable disk, volatile or non-volatile memory, embedded processors, and so on), the set of commands that are executed with the possibility of programming a computer, 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 steps shown in the flowchart of the execution sequence of the method is not limited to the specific sequence, and in later stages 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 escarpia the supervisor, or to limit the invention just disclosed form, and obviously, in the light of the open topics 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 (200A, 200b, 200C), comprising: a first light-emitting element (110)having a first output and a second output; a 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); a third light-emitting element (210)having a first output connected to the first output of the first light-emitting element (110), and a second output; a first switch (130)having a first output connected to each of the first conclusions of the first and third light emitting elements,110, 210), and a second output connected to the first output of the second light-emitting element (120); and a second switch (230)having a first output connected to the second output of the third Sveti the illuminating element (210), and a second output connected to each of the second findings of the first and second light emitting elements (110, 120), the first output of the first light-emitting element (110) is connected to the first bus (172) of the power supply and the second output of the first light-emitting element (110) is connected to the second bus (174) of the power source, the first, second and third light emitting elements (110, 120, 210) are respective first, second and third working voltage (VOP1VORand VOR), the relative ratio between them is determined by the relation
VOP1>VORVor,
in which the second light-emitting element (120) is arranged to consumption, at least part of the current applied to the first or second bus (172, 174) of the power source when the first switch (130) is closed and the second switch is in the open state; and a third light-emitting element (210) is arranged to consumption, at least part of the current applied to the matrix (200A, 200b, 200C) of light elements, when the first switch (130) is in the open state and the second switch is in the closed state.

2. Matrix (200A, 200b, 200C) of light elements according to claim 1, in which the first, second or third St is titlecase elements (110, 120, 210) is selected from the group consisting of LEDs, organic LEDs, led, AC, laser diode or incandescent bulbs.

3. Matrix (200A, 200b, 200C) of light elements according to claim 1 or 2, additionally containing a cumulative element connected to one or more first, second, or third light emitting elements(110, 120, 210).

4. Matrix (200A, 200b, 200C) according to claim 3, in which the cumulative element includes a capacitor (160)connected in parallel to one or more of the first, second or third light emitting elements(110, 120, 210).

5. Matrix (200b) of light elements according to claim 1, additionally containing a fourth light-emitting element (220)having a first output connected to the second output of the first switch (130), and a second output connected to the first output of the second switch (230), the fourth light-emitting element (220)than the fourth operating voltage (VOR)at which or above which the fourth light-emitting element (220b) are able to emit light.

6. Matrix (200b) of light elements according to claim 5, in which the first output of the first light-emitting element (110) is connected to the first bus (172) of the power supply and the second output of the first light-emitting element (110) is connected to the second bus (174) of the power source and in which the fourth light is radiating element (220) is arranged to consumption, at least part of the current supplied to the matrix (200b) of light elements when the first and second switches (130, 230) are both in the closed state.

7. Matrix (200b) of light elements according to claim 5 or 6, in which the first, second, third and fourth light emitting elements (110, 120, 210, 220) are respective first, second, third and fourth working voltage (VOP1VORVORand VOR), the relative ratio between them is determined by the relation
VOP1>VOP2VOR>VOR.

8. Matrix (200b) of light elements according to claim 5 or 6, optionally containing cumulative element connected to the fourth light-emitting element (220).

9. Matrix (200b) of light elements according to claim 8, in which the cumulative element contains the receptacle (160)connected parallel to the fourth light-emitting element (220).

10. Matrix (200C) of light elements according to claim 1, additionally containing coreconnection connected between the second output of the first switch (130) and the first output of the second switch (230).

11. Light-emitting device (500)comprising: the matrix (200A, 200b, 200C) of light elements, corresponding to any one of claims 1 to 10;
source (510) power supply having a control input (510b) and output (510) power connected to supply current for the matrix (200A, 200b 200C) of light elements; and the controller (520)having a first output (a)connected to the control input (510b) source (510) power supply, the second output (520b), connected to the first switch (130) matrix (200A, 200b, 200C) of light elements, and the third output (s)connected to the second switch (230) matrix (200) of light elements, the first output (a), configured to provide the control signal (522) source (510) power to set the modes for the output level of the source (510) power supply, and the second output (520b), configured to provide the control signal (524) to control the state of the first switch (130), and the third exit (520)is configured to provide the control signal (526) to control the state of the second switch (230).

12. The mode of action of the matrix (200A, 200b, 200C) of light elements, the matrix (200A, 200b, 200C) of light elements includes the first light-emitting element (110)having a first output connected to the first bus (172) of the power source and a second output connected to the second bus (174) of the power source, 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), the third light-emitting element (210)having a first output connected to the first output per the CSOs light-emitting element (110), and a second output, the first switch (130)having a first output connected to each of the first conclusions of the first and third light emitting elements (110, 210), and a second output connected to the first output of the second light-emitting element (120)and second switch (230)having a first output connected to the second output of the third light-emitting element (210), and a second output connected to each of the second findings of the first and second light emitting elements (110, 120), the first output of the first light-emitting element (110) is connected to the first bus (172) of the power supply and the second output of the first light-emitting element (110) is connected to the second bus (174) of the power source, the first, second and third light emitting elements (110, 120, 210) are respective first, second and third working voltage (VOP1VORand VOR), the relative ratio between them is determined by the relation
VOP1>VORVOR,
the second light-emitting element (120) is arranged to consumption, at least part of the current applied to the first or second bus (172, 174) of the power source when the first switch (130) is closed and the second switch is in open condition, and in which t is th light-emitting element (210) is arranged to consumption, at least part of the current applied to the matrix (200A, 200b, 200C) of light elements, when the first switch (130) is in the open state and the second switch is closed, the method comprises steps in which: operate each of the first and second switches (130, 230), putting them in open position or in closed position, and serves current to the first or second bus (172, 174) power supply matrix (200A, 200b, 200C) of light elements, while, at least part of the supplied current is supplied to the first light-emitting element (110), when the first and second switches (130, 230) both are in the open state, in which at least part of the supplied current is supplied to the second light-emitting element (120), when the first switch (130) is closed and the second switch (230) is in the open condition; and at least a portion of the supplied current is supplied to the third light-emitting element (210), when the first switch (130) is in the open state and the second switch (230) is in the closed state.

13. The method according to item 12, in which the current applied to the first light-emitting element (110), contains the average current

where I1the amplitude of the current applied to the first light is oslocale element (110), T - time period supply current to the first light-emitting element (110) and t1activation period during which each of the first and second switches (130, 230) is in the open state to supply current I1at first light emitting element 110.

14. The method according to item 12, in which the current supplied to the second light-emitting element (120), contains the average current

where I2the amplitude of the current applied to the second light-emitting element (120), T - time period applying current to the second light-emitting element (120) and t2activation period during which the first switch (130) is closed and the second switch (230) is in the open state to supply current I2on the second light emitting element 120.

15. The method according to item 12, in which the current applied to the third light-emitting element (210), contains the average current

where I3the amplitude of the current applied to the third light-emitting element (210), T - time period supply current to the third light-emitting element (210) and t3activation period during which the first switch (130) is in the open state and the second switch (230) is closed to supply current I3on the third light-emitting the element is provided (210).

16. The method according to any of PP-15, in which the matrix (200b) of light elements further comprises a fourth light-emitting element (220)having a first output connected to the second output of the first switch (130), and a second output connected to the first output of the second switch (230), and in which the control includes the management of each of the first and second switches (130, 230) to the closed state, while at least part of the supplied current is fed to the fourth light-emitting element (220).

17. The method according to clause 16, in which the current supplied to the fourth light-emitting element (220), contains average current:

where I4the amplitude of the current applied to the fourth light-emitting element (220), T - time period supply current to the fourth light-emitting element (220) and t4activation period during which the first and second switches (130; 230) are closed to supply current I4on the fourth light-emitting element (220).



 

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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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