Circuit with light-emitting diodes, as well as light-emitting diode array and device

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

 

The invention relates to a circuit with light emitting diodes and also refers to the matrix containing the circuit with light emitting diodes to the device containing the circuit with light emitting diodes or containing matrix, method, computer program product and to the media.

Examples of such schemes with light-emitting diodes are diagrams containing one or more light-emitting diodes without exception other schemes. Examples of such devices are consumer and non-consumer goods.

US 2005/0116665 discloses a diagram of the controller used to control the brightness of the multiple light-emitting diodes in the matrix.

Scheme with light-emitting diodes of the previous prior art known from document EP 1320284 A2, which discloses several schemes with light-emitting diodes and multiple master devices for controlling these circuits with light-emitting diodes.

In circuits with light-emitting diodes of the previous prior art, the first light-emitting diode is turned on (turned off) by using the first steps, such as, for example, the closing (opening) of the first switch to display (naokazu) of the first light to the user, and the second light emitting diode is turned on (turned off) by using a second action, such as, for example, the closing (opening) of the second switch is to show (naokazu) of the second light to the user.

Scheme with light-emitting diodes of the previous prior art is disadvantageous, inter alia, in the fact that different actions, such as closing (opening) of the different switches are used to activate (deactivate) the different light-emitting diodes for displaying different kinds of light to the user. This is a relatively difficult.

The invention, among others, is to provide a circuit with light emitting diodes, which is relatively simple.

Additional objectives of the invention, among others, are providing a matrix containing the circuit with light emitting diodes, the device containing the circuit with light emitting diodes or containing matrix, method, computer program product and media that are relatively simple.

According to the invention the circuit with light emitting diodes includes:

the first subcircuit containing the first light-emitting diode, the first subcircuit are connected to terminals, and

- the second subcircuit containing a second light-emitting diode, and the second subcircuit are connected to terminals, first and second subcircuits are parallel subcircuit and the second subcircuit further comprises a switch in a conducting state, to turn on the second light-emitting diode and off Pervov the light-emitting diode, and in a non-conductive state, to turn off the second light emitting diode and including a first light emitting diode.

Introducing two parallel subcircuit, the first subcircuit that does not contain a switch, and a second subcircuit containing the switch, it becomes possible to activate one of the light-emitting diodes and at the same time to deactivate the other light emitting diode through the same switch. In addition, the second subcircuit, for example, to switch in a conducting state, should have a lower threshold signal, such as a lower threshold voltage or the lower threshold voltage than the first subcircuit. In this case, to switch in a conducting state, the second light-emitting diode will work, and the first light emitting diode is not, and Vice versa for the switch being non-conductive state. Other options are not excluded.

Scheme with light-emitting diodes according to the invention is additionally predominant in that, inter alia, that may require a smaller area of the chip compared to schemes with light-emitting diodes of the previous prior art, which contain the switch in each subcircuit.

The fact that the switch is in a conducting state or a nonconducting state, with therefore, its, consistent with the full resistance of the switch, which is smaller than the threshold value, or greater than this threshold value, respectively.

An implementation option scheme with light-emitting diodes according to the invention is a single output switch connected to one terminal and the other output of the switch is connected to one output side of the second subcircuit, this part contains a second light-emitting diode, and the other output side of the second subcircuit is connected with the other terminal. The presence of the switch inside the second subcircuit does not exclude the presence of two switches instead of one switch inside the second subcircuit. In this case, one output of the first switch, for example, connected to the first terminal and the other output of the first switch, for example, is connected with a part of the second subcircuit, which contains a second light-emitting diode, and the other conclusion of this part, for example, is connected with one output of the second switch, and the other output of the second switch, for example, is connected with the second terminal, thus, the first and second switches simultaneously.

The previous version of the implementation is not viewed too narrowly. Control switch easier if one of its conclusions is connected to one of the terminals, but it is also possible that the repair is ü not connected directly with any one of the terminals, for example, in the case of multiple light-emitting diodes in the chain.

An implementation option scheme with light-emitting diodes according to the invention defined by the first and second light emitting diodes having different colors. This option is useful, for example, in the case of light-emitting diodes used as the backlight.

An implementation option scheme with light-emitting diodes according to the invention is defined more content:

third subcircuit containing the third light-emitting diode, the third subcircuit are connected to terminals, first, second and third subcircuits are parallel subcircuits, and the third subcircuit further comprises an additional switch in a conducting state, to include a third light emitting diode and switching off the first light emitting diode, and a non-conductive state, to turn off the third light-emitting diode and, in the case of a switch, also located in a non-conductive state, enable the first light-emitting diode, and switch to a nonconducting state, enable the first light-emitting diode in the case, when the auxiliary switch is also in a non-conductive state. Switch and the additional switch three subcircuits can b the th useful activated and deactivated.

An implementation option scheme with light-emitting diodes according to the invention is a single output external switch connected to one terminal and another terminal of the additional switch connected to one output side of the third subcircuit, this part includes a third light emitting diode, and the other output of the third subcircuit is connected with the other terminal. Again, the presence of an additional switch inside the third subcircuit does not exclude the presence of two switches instead of one switch inside the third subcircuit etc.

The previous version of the implementation is not viewed too narrowly. The control of the auxiliary switch will be easier if one of its conclusions is connected to one of the terminals, but it is also possible that the additional switch is not connected directly to either of the terminals, for example, in the case of multiple light-emitting diodes in the chain.

An implementation option scheme with light-emitting diodes according to the invention is defined first, second and third light emitting diodes having different colors. This option is useful, for example, in the case of light-emitting diodes used as the backlight.

An implementation option scheme with light-emitting diodes according to the invention is determined by the PE the howling subcircuit and the second subcircuit, having different characteristics of the signal. Different characteristics of the signal can, for example, contain different voltage characteristics, and/or different current characteristics, and/or different current-voltage characteristics, without exception, additional characteristics for the switch in a conducting state. Of course, the second subcircuit and the third subcircuit may have different characteristics signal for secondary switch in a conducting state, thus, the characteristics of the signal, the first and third subcircuits may be identical or not for their switches placed in the conductive state.

An implementation option scheme with light-emitting diodes according to the invention is defined by different characteristics of the signal, containing a different minimum threshold voltage. Preferably, the minimum threshold voltage of the first subcircuit is greater than the minimum threshold voltage of the second subcircuit to switch in a conducting state. Of course, preferably, the minimum threshold voltage of the first subcircuit is greater than the minimum threshold voltage of the third subcircuit, as well as for additional switch which is in a conducting state, thus, the minimum threshold voltage of the second and t is ETA subcircuits can be equal or not for their switches, located in a conductive state.

An implementation option scheme with light-emitting diodes according to the invention is defined by the first subcircuit containing more first light emitting diodes and the second subcircuit containing more second light emitting diodes, the sum of the direct voltages of the first chain and/or more first light emitting diodes is greater than the sum of the direct voltage of the second chain and/or more second light emitting diodes. Making the direct sum of the voltages of the first chain and/or more first light emitting diodes is greater than the sum of the direct voltage of the second chain and/or more second light emitting diodes, the minimum threshold voltage of the first subcircuit is greater than the minimum threshold voltage of the second subcircuit to switch in a conducting state. This can be done by selecting different types of light-emitting diodes and/or by selecting a different number, for example, series-connected light-emitting diodes. Of course, the third subcircuit may also have additional third light-emitting diodes with the direct sum of the voltages of the first chain and/or more first light emitting diodes is greater than the sum of direct stresses chain of the third and/or additional the data of the third light-emitting diodes, to make the minimum threshold voltage of the first subcircuit greater than the minimum threshold voltage of the third subcircuit for additional switch which is in a conducting state, etc.

An implementation option scheme with light-emitting diodes according to the invention is defined by the first subcircuit, optionally containing an element with a threshold voltage, connected in series with the first light-emitting diode. Such an element with a threshold voltage of, for example, contains one or more diodes and/or one or more transistors to increase the minimum threshold voltage of the first subcircuit, without excluding other elements.

Led matrix according to the invention contains a circuit with light emitting diodes according to the invention and further comprises a power source connected to the terminals.

An implementation option led matrix according to the invention is defined by the power source, containing the first and second transistors that are managed through the shaper circuit, the first main electrode of the first transistor is connected with one output of the voltage source, the second main electrode of the first transistor is connected with the first main electrode of the second transistor and one output of the induction coil, the second main electrode of the second transit the RA is connected to another output of the voltage source and one of the terminals, and the other output of the induction coil is connected with the other terminal.

Relative to the first and second transistors may be noted that there is an important difference between these transistors and one or more circuit switches with light-emitting diodes. This one or more switches can be implemented through the transistors, without prejudice to other implementations. However, one or more switches in circuit with light emitting diodes will typically switch at a lower frequency of <20 kHz, while the transistors of the power supply will typically switch at a higher frequency >1 MHz.

The device according to the invention contains a circuit with light emitting diodes according to the invention or which contains led matrix according to the invention.

Embodiments of led matrix according to the invention and the device according to the invention and of the method according to the invention, and computer software product according to the invention, the media according to the invention correspond to the implementation of the scheme with light-emitting diodes according to the invention.

The invention is based on the insight, inter alia, that the switch in each subcircuit is relatively complex, and is based on the basic idea, inter alia, that the switch should be put in place is Yong, in a conducting state, to turn on the second light-emitting diode on and off the first light emitting diode and a non-conductive state, to turn off the second light emitting diode and including a first light emitting diode.

The invention solves the problem, inter alia, provide the scheme with light-emitting diodes, which is relatively simple. Scheme with light-emitting diodes according to the invention is additionally predominant in that, inter alia, that may require a smaller area of the chip compared to schemes with light-emitting diodes of the previous prior art, which contain the switch in each subcircuit.

These and other aspects of the invention will be understood and explained with reference to the option(s) that are described later in this document.

In the drawings:

figure 1 shows a diagram of the led matrix according to the invention containing the circuit with light emitting diodes according to the invention,

figure 2 shows a diagram of the led matrix according to the invention, containing an equivalent circuit with light emitting diodes according to the invention,

figure 3 shows the signals for the led matrix according to the invention, and

figure 4 shows schematically the device according to the invention, containing light the diode matrix according to the invention and/or a circuit with light emitting diodes according to the invention.

The led array 2 according to the invention shown in figure 1, contains the schema 1 with light-emitting diodes according to the invention and contains the block 22-25 power supply connected to a source 21 of the voltage. Block 22-25 supply contains a first transistor 23 and the second transistor 24 is driven through the circuit 22 of the shaper, which is connected with the control electrodes of the transistors 23 and 24. The first main electrode of the first transistor 23 is connected to one output source 21 voltage, the second main electrode of the first transistor 23 is connected to the first main electrode of the second transistor 24 and to one output of the induction coil 25, the other output of the induction coil 25 is connected with the first terminal and the second main electrode of the second transistor 24 is connected to another output channel 21 voltage and via a resistor 26 with the second terminal.

Scheme 1 with light-emitting diodes includes a first subcircuit, which is connected to both terminals and which contains the first light-emitting diode 11. Scheme 1 with light-emitting diodes further comprises a second subcircuit, which is connected to both terminals and which includes a serial connection of the second light-emitting diode 13 and a switch 14. Scheme 1 with light-emitting diodes further comprises a third subcircuit, which is connected with both terminals of the which includes a serial connection of the third light-emitting diode 15 and an additional switch 16.

14 switch in a conducting state includes the second light-emitting diode 13 and turns off the first light emitting diode 11, and a non-conductive state, turns off the second light-emitting diode 13 and includes a first light emitting diode 11 in the case, when the auxiliary switch 16 is also in a non-conductive state. Additional switch 16 in a conducting state includes the third light-emitting diode 15 and turns off the first light emitting diode 11, and a non-conductive state, turns off the third light-emitting diode 15 and includes a first light emitting diode 11 when the switch 14 is also in a non-conductive state.

Introducing three parallel subcircuit, the first subcircuit, not containing the switch, and the second and third subcircuit containing the switches 14, 16, it is possible to activate one of the light emitting diodes 11, 13, 15 and at the same time to deactivate the other light-emitting diodes 11, 13, 15 only through the two switches (more generally: p subcircuits, or groups, or branches, or chains and p-1 switches). In addition, the second and third subcircuit, for example, switches 14, 16, which is in a conducting state, should have a lower threshold signal, for example a lower threshold voltage or the lower threshold voltage than the first subcircuit. In this case, for the onethe switches 14, 16, which is in a conducting state, the second or the third light-emitting diode 13, 15 will work, and the first light-emitting diode 11 is not, and Vice versa for both switches 14, 16, in non-conductive state.

The fact that the switch 14, 16 is in a conducting state or a non-conductive state, respectively, is consistent with the full resistance of the switch 14, 16, which is smaller than the threshold value, or greater than this threshold value, respectively.

Preferably, for example, to use light emitting diodes as a backlight of the first, second and third light emitting diodes 11, 13, 15 will have different colors such as green, red and blue, respectively.

Preferably, the first subcircuit on the one hand and the second and third subcircuit on the other hand will have different characteristics of the signal, such as a different minimum threshold voltage. Each light-emitting diode 11, 13, 15, shown in figure 1, may be replaced by two or more light-emitting diodes are preferably of the same color for each subcircuit. These two or more light-emitting diodes can have for each subcircuit fully sequential design, or a fully parallel design, or partly sequential and partly parallel design, the U.

To implement different features of the signal according to the first embodiment can be used in different kinds of light-emitting diodes. According to the second variant the total number of consecutive first light-emitting diodes can be made larger than the total number of consecutive second (third) light-emitting diodes. Under the third option element with a threshold voltage, such as one or more (typical) diode or transistor circuits may be sequentially connected to the first light-emitting diode(AMI). Mixing these options should not be excluded.

The led array 2 according to the invention shown in figure 2 is consistent with that shown in figure 1 except for the fact that in scheme 1 with light-emitting diodes light-emitting diodes 11, 13, 15 have been replaced by their equivalent circuits. As a result, for the first light-emitting diode 11 shows the serial connection of the source 51 voltage (Uthreshold) and resistance 52 (R) (in the case of the m first light-emitting diode 11, it will be m·Uthreshold and m·R). For the second light-emitting diode 13 shows the serial connection of the source 53 voltage (Uthreshold) and resistance 54 (R) (in the case of the n second light-emitting diodes 13, it will be n·Uthreshold and n·R). For the third light-emitting diode 15 is shown connected in series source 55 nab is Azania (Uthreshold) and resistance 56 (R) (in the case of n third light-emitting diodes 15 it will be n·Uthreshold and n·R).

Figure 3 shows the signals for the led matrix 2 according to the invention. Obviously, when the switch 14 is in a conducting state (indicated as "1"), the second light-emitting diode 13 emits. When the auxiliary switch 16 is in a conducting state (indicated as "1"), the third light-emitting diode 15 emits. When both switches 14, 16 are in non-conductive state (indicated as "0"), the first light-emitting diode 11 emits, but only during operation of the first and second transistors 23, 24, which are switched in antiphase. Different frequency switches 14, 16 on the one hand and the transistors 23, 24 on the other hand also clearly shown.

Device 3 according to the invention, shown in figure 4, contains led matrix 2 according to the invention and/or the scheme 1 with light-emitting diodes according to the invention and further comprises, for example, AC-DC Converter 4, which in this case contains the source 21 voltage. In other words, this AC-DC Converter, for example, receives the AC voltage and converts it into DC voltage, which is supplied to the block 22-25 power etc.

The invention can be explained by the fact that light emitting diodes require a minimum positive direct voltage before they will begin to conduct and forms the encoded light. This voltage is also known as LED-threshold voltage Vth. In a simplified scheme in figure 2, each chain LED represented by a set of serial resistors and LED multiple LED threshold voltage Vth. Taking equal to the threshold voltage for red, green and blue LED and a power supply unit that generates a constant current, the voltage of the circuit of the red or chain blue during conduction (with the appropriate activated switch) will be less than the minimum voltage required for the green LED to start conduction current (m>n). For this reason, the green LED will not emit any light when blue or red LED, even if both circuits are connected in parallel, and the green chain is really not disconnected his own load switch. If the green LED will improve in the future (m~n), the difference in drop forward voltage for the LED GaP-type compared with GaN LED-type can still be sufficient to omit one switch in many applications.

The invention is particularly suitable for devices such as LCD TVs with continuous color backlight, but can also be used for a wide range of LED lamps with different color or LED lamps emitting white light by mixing light a few LED, for example, for General lighting. It also predlagaetvashemu in mnogosetochnykh and/or multicolor OLED applications as for OLED devices, the forward voltage drop to a certain extent can be adjusted to the desired value. This allows one chain OLED devices consistent with the overall drop in forward voltage, which is always high enough to lower the appropriate radio button.

It should be noted that the above embodiments of rather illustrate than limit the invention, and that the specialists in the art will be able to design many alternative embodiments of without straying from the scope of the attached formula. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The use of the verb "to have" and its conjugations does not exclude the presence of elements or steps other than those specified in the claims. The article "a" or "an" before an element does not exclude the presence of many such elements. The invention can be implemented by hardware, contains several distinct elements, and by a suitably programmed computer. In the device, in which formula lists several means, several of these means can be realized by one and the same item of hardware. Simple is the act that certain measures referred to in the various dependent claims, does not mean that the combination of these measures cannot be used with benefit.

1. Scheme (1) with light-emitting diodes, comprising: a first subcircuit containing the first light-emitting diode (11), the first subcircuit is connected to the terminals, and the second subcircuit containing a second light-emitting diode (13), while the second subcircuit are connected to terminals, first and second subcircuits are parallel subcircuit and the second subcircuit further comprises a switch (14) for inclusion in a conducting state of the second light-emitting diode (13) and turn off the first light emitting diode (11), and to turn off in a non-conducting state of the second light-emitting diode (13) and turn on the first light-emitting diode (11).

2. Scheme (1) with light-emitting diodes according to claim 1, in which one lead of the switch (14) is connected to one terminal and the other output of the switch (14) is connected with one output of the second subcircuit, part of which contains a second light-emitting diode (13), and the other output side of the second subcircuit is connected with the other terminal.

3. Scheme (1) with light-emitting diodes according to claim 1, in which the first and second light emitting diodes (11, 13) have different colors.

4. Scheme (1) with light-emitting diodes according to claim 1, further comprising: a third subcircuit containing the third light-emitting diode (15), p and third subcircuit is connected to the terminals, first, second and third subcircuits are parallel subcircuits, and the third subcircuit further comprises an additional switch (16) for inclusion in a conducting state of the third light-emitting diode (15) and turn off the first light emitting diode (11), and to turn off in a non-conducting state of the third light-emitting diode (15) in the case of the switch (14), also located in a non-conductive state, enable the first light-emitting diode (11)and the switch (14) in the non-conductive switching state of the first light-emitting diode (11) in the case when the auxiliary switch (16 there is also non-conductive state.

5. Scheme (1) with light-emitting diodes according to claim 4, in which one additional output switch (16) is connected to one terminal and the other terminal of the additional switch (16) is connected with one output of the third subcircuit, and this part includes a third light-emitting diode (15), and the other output of the third subcircuit is connected with the other terminal.

6. Scheme (1) with light-emitting diodes according to claim 4, in which the first, second, and third light-emitting diodes (11, 13, 15) have different colors.

7. Scheme (1) with light-emitting diodes according to claim 1, in which the first subcircuit and the second subcircuit have different characteristics of the signal.

8. Scheme (1) with svatos Causeni diodes according to claim 7, in which different characteristics of the signal have different minimum threshold voltage.

9. Scheme (1) with light-emitting diodes according to claim 7, in which the first subcircuit contains more first light emitting diodes and the second subcircuit contains more second light emitting diodes, the sum of the direct voltages of the first chain and/or more first light emitting diodes is greater than the sum of the direct voltage of the second chain and/or more second light emitting diodes.

10. Scheme (1) with light-emitting diodes according to claim 7, in which the first subcircuit further comprises an element with a threshold voltage, connected in series with the first light-emitting diode (11).

11. Led matrix (2)that contains the schema (1) with light emitting diodes as defined in claim 1, and optionally containing block (22-25) power supply connected to the terminals.

12. Led matrix (2) according to claim 11, in which the block (22-25) power supply includes first and second transistors (23, 24)that are managed through the scheme (22) of the imaging unit, and the first main electrode of the first transistor (23) is connected with one output of the source (21) voltage, the second main electrode of the first transistor (23) is connected to the first main electrode of the second transistor (24) and one output induction coil (25), the second basic electronic the rod of the second transistor (24) is connected with another output source (21) voltage and one of the terminals, and the other output of the induction coil (25) is connected to the other terminal.

13. The device (3)that contains the schema (1) with light-emitting diodes according to claim 1.

14. The device (3)containing the led matrix (2) item 11.

15. Way on and off the light emitting diodes (11, 13), in which the first subcircuit includes a first light emitting diode (11), the first subcircuit is connected to the terminals, and the second subcircuit includes a second light-emitting diode (13), while the second subcircuit are connected to terminals, first and second subcircuits are parallel subcircuit and the second subcircuit further comprises a switch (14), and this method includes the steps are: lead switch (14) to the conducting state to turn on the second light-emitting diode (13) and turn off the first light-emitting diode (11), and a lead switch (14) in a non-conductive state to turn off the second light-emitting diode (13) and including a first light emitting diode (11).

16. Media containing a computer program product for switching on and off light-emitting diodes (11, 13), with the first subcircuit includes a first light emitting diode (11), the first subcircuit is connected to the terminals, and the second subcircuit includes a second light-emitting diode (13), while the second subcircuit are connected to terminals, p is pout and second subcircuits are parallel subcircuits, and the second subcircuit further comprises a switch (14), a computer software product, the method performs the steps of the method according to clause 15.



 

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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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