Lighting device with organic light-emitting diodes

FIELD: electricity.

SUBSTANCE: invention is referred to a lighting device adapted for installation into a respective socket. The lighting device has a base or a body which embodies an organic light-emitting diode (LED) at least partially and an electronic circuit diagram which influences on electric power passage from the external terminal to the organic LED. The electronic circuit diagram can include a memory module, a communication module, a sensor, etc. for intelligent controlling of the LED and making the lighting device adapted to potential changes in excitation standards.

EFFECT: possibility of long-term use in standardised media.

10 cl, 3 dwg

 

The invention relates to a lighting device that is adapted for installation in an appropriate cartridge and which contains an organic light-emitting diode (organic LED) in the body.

EP-A-1 194013 discloses a display screen with a set of pixels on organic LED and photoelectric sensors in which the sensor signals are transmitted to the control device with feedback. The control unit can be placed on the same substrate as the pixels and sensors.

US 2007/108843 A1 discloses a lighting system of a vehicle, containing a lot of LED driven by a current source. For each LED provides a key that can be snapped from the condition that the corresponding LED could be bypassed in the event of a failure. From US 2006198128 A1 is known a method, by which the LED along with some hardware can be fully integrated into the transparent plastic. The resulting lighting devices are intended only for special purposes and are not suitable as low-cost devices.

Based on this prior art, the objective of the present invention was to provide an alternative lighting device, it is desirable that this device was suitable for mass production, long-term use is tion in standardized environments and/or backwards compatible with older standards.

This goal is achieved by a lighting device according to paragraph 1 of the claims. Preferred embodiments of disclosed in the dependent claims.

The lighting device according to the present invention adapted for installation in the appropriate (standardized) cartridge and contains the following components:

a) organic light-emitting diode, as usual, briefly denoted organic LED in the following. Organic LEDs have the advantage that they can be operated at low voltages, have a long service life and can be produced at low cost, with a large area and in many colors. For detailed information about organic LED reference is made to the literature (for example, the Joseph Shinar (editor): "Organic Light Emitting Devices, A survey" ("Organic light-emitting diodes. Overview"), Springer, 2004);

b) a housing that at least partially embeds the organic LED. Housing, for example, can be made of plastic, more precisely by injection molding under pressure;

c) at least one external electrical terminal on the outer surface of the shell, through which electricity may be supplied to the lighting device. The layout and dimensions of the outer terminals preferably according to who, owing to some standard, thus, providing the ability to insert the lighting device compatible cartridges from different manufacturers;

d) an electronic circuit located in the housing and containing passive and/or active electronic components (e.g. resistors, capacitors, inductors, diodes and transistors), which affect the flow of electricity from an external terminal in an organic LED.

Described lighting device has the advantage to combine in a single chassis organic LED and some more or less sophisticated electronic hardware that are involved in the electrical control organic LED. Thus, there is some advanced logic included in the lighting device, which can be used to achieve a more multifunctional management of organic LED, for the implementation of protection mechanisms for making the device adaptable to possible future changes in technology and methods of excitation organic LED. Moreover, the lighting device with its housing (cap) can be made backwards compatible from the condition that it could be replaced in an existing cartridge and to electronic components guaranteed performance characteristics of the device according to the specifications of the aforementioned cartridge, even if he would have organic LED could be significantly altered.

Components of the lighting device, in particular an organic LED and the housing, preferably connected to form a single structure, i.e. a product which may be treated as a single element and, for example, completely replaced in case of failure. Preferably, the organic LED and the body are connected through the binding material, i.e. at the level of atomic/molecular bonding, for example using an adhesive, which attaches them to each other and seals them against dust or moisture.

An electronic circuit can be implemented in many different ways and performs various tasks. In one of specific embodiments, an electronic circuit includes a programmable memory for storing information that identifies the device and/or which affects the circuit operation mode. The fact that the memory module is "programmable"means that the information stored in it, can be established or changed by electronic means. Information can be stored in memory by the manufacturer and remain unchanged throughout the lifetime of the lighting device (for example, if the memory module is implemented as a ROM (the post is permanent mass storage device, ROM or EPROM (programmable ROM, PROM). Preferably, an information module, however, can be changed, if necessary, at any time during use of the lighting device. This is, for example, provides the ability to dynamically assign a unique address of the lighting device, if it is used in networks with variable composition. Moreover, it will be possible in this way to adapt the management of organic LED to modern standards external formers, which probably should change in the future due to the ongoing rapid development in the field of technology of organic LED. Thus, it will be possible to do the lighting device is backward compatible (with older shapers), and also directly compatible with the new shapers, not yet available at that time, when the lighting device is manufactured). Upgrading a memory module, for example, could be achieved by reading a barcode with a new device and associative account related information (for example, parameters of the shaper) in memory.

According to another variant implementation, the electronic circuit contains a switching module to change the trace or connection of the external terminals in the event of a failure. For example, a short circuit is tipin the m refusal organic LEDs; to prevent that other lighting devices used in the same network, was under the influence of such a short circuit, switching module, for example, can be shut down or bypassed defective organic LED in this case.

An electronic circuit, optionally, may include a communication module for single or bi-directional communication with external devices. The above-mentioned module, for example, may include a receiver and/or transmitter for wireless communication. Alternatively or additionally, it can be attached to an external terminal (for example, the same terminal through which power is supplied) to connect the wire. Thus, the electronic circuitry can be mounted on the connection, which, for example, provides the ability to read operational parameters, information from sensors, address, etc. and/or to make changes in the electronic circuit from the outside.

According to another another variant implementation, the electronic circuit includes a Converter module for converting a voltage supplied to the external terminal, the current which actually excites organic LED. Thus, there is a transition phase between the external signal (voltage) and internal action (shock), which, optionally, can adapt to the changes in the standards of the external driver is.

Moreover, an electronic circuit may be equipped with one or more sensors, such as sensors for light, temperature, sound, and/or proximity of an object, like a man. The sensor(s) can be used to monitor the status of the lighting device, for example its working temperature, while the mentioned information from sensors, for example, may be communicated in some external higher-level controller.

Preferably, the above-mentioned sensor(s) used to signal that (directly) affects the operation mode of the electronic circuit. Light sensor, for example, can be used to adjust the brightness or color organic LED under ambient lighting, or temperature sensor can be used to reduce energy consumption of organic LEDs in case of an imminent threat of overheating.

An electronic circuit, in particular, may include a control module to control the brightness and/or color organic LED. As explained above, the operation of the control module may be subject to different influences, for example the sensor signals, the memory content or information transmitted on the lighting device from the outside.

To save the size of the lighting device can be smaller and compatible with the specified standard electronic shemalecocktail is located in a recess, which is provided in the housing.

These and other aspects of the invention will be apparent from and elucidated with reference to the option(s) described hereinafter. These options are implemented will be described as an example with the help of the attached drawings, on which:

Figure 1 schematically shows a section through a first variant implementation of the lighting device according to the present invention, electronic components, integrated into the body;

Figure 2 schematically shows a section through a second variant implementation of the lighting device according to the present invention, with the electronic components mounted on the printed circuit Board or mounting tape;

Figure 3 schematically shows an electronic circuit used in the lighting device according to the present invention.

The same reference numbers or numbers that differ by an integer multiple of 10, indicated by reference to the figures, identical or similar components.

It is highly probable that the technology of organic LED will continue to change rapidly for many years. This leads to the problem that many of the standards for Chuck and plinth lighting devices containing organic LED, will follow within a short period. However, the lighting device to be serviced is for many years.

Moreover, the known organic LEDs have a low efficiency, but it is expected that this should significantly improve in the near future. This implies that the formers, are currently defined, will not be compatible with organic LED, produced for several years. Thus, there is the problem that modern solutions probably will not be accepted for a few years.

Another problem is that the typical nature of the failure of the organic LED is short-circuited. A common way is to attach several organic LED to a single driver. If the organic LED connected in a parallel circuit, zahratka in one organic LED will also interfere with the other light.

Because organic LED will enable new applications, in addition, it is likely that there will be a strong relationship between organic LED and functional or interactive solutions.

To take measures in response to the above problems, it is proposed to provide some advanced logic near the lamp, i.e. in its socle. This can make organic LED is backwards compatible and/or disable the organic LED in case of short circuit. The extension of the cap sensors (RF) RF receivers or others who shM views of electronics communications also can create a functional and interactive applications. Thus, adding advanced logic in the basement will solve many problems and even to extend the field of application of organic LED.

Figure 1 schematically shows a lighting device 10 according to the first variant implementation of the invention, which implements the above principles. The lighting device 10 includes three main components:

organic LED 11, which typically contains two glass plates with fluorescent organic material between them;

the housing 12 or the base, which embeds the lower part of the organic LED 11;

- electronic circuits 13a, 13b, which are electrically combined in an electrical path from the external terminals 15a, 15b to the organic LED 11.

The lighting device 10 is adapted for installation in the appropriate cartridge 1 with an electric terminal for leading energy, which is schematically indicated in the figure.

The housing 12 of the cartridge-ground solutions to protect organic LED 11. He favored may be made of plastic. Moreover, there may be created a case of two-component plastic, where one component can be used for the electrolytic deposition of electroplating conductive tracks (and no other component). Thus, it is possible to integrate the conductive tracks 14 in the housing. Due to the capabilities of formovochnogo process for the housing, there is freedom in three dimensions; thus, it is possible to integrate electronic components 13a, 13b in the notches of the body that maintain a small form factor organic LED undamaged. The conductive tracks 14 provide the ability to add any type of electrical component in the housing. Organic LED 11 can be connected to these conductive paths by means of welding, soldering, gluing or any other method of connection. After Assembly of organic LED 11 and the housing 12, the adhesive filler can be used to fill air gaps and create a mechanically stable structure.

The housing 12 may contain all kinds of electrical components in circuits 13a, 13b. This can be used to limit the starting current, break the circuit, selection coefficient, sensors, functional properties, receivers, data, etc.

Figure 2 shows an alternative implementation of the lighting device 20. In this case, the cap can be created in a more traditional way, by combining a plastic or metal housing 22 with a separate circuit Board (PCB) or a circuit film 23, which is connected to the organic LED 21 lines 24 and is additionally connected to the external terminal 25.

By choosing K is included plastic housing 12, 22 can also serve as a heat sink. This helps to reduce thermal problems of organic LED.

Figure 3 schematically shows components that may contain an electronic circuit 13a (or any other scheme 13b, 23)described above. Circuit 13a shown electrically included in the line between the external terminal 15a and organic LED 11. In practice, the external circuit can be connected to other internal or external terminals, auxiliary electrodes of the organic LED or any other interesting electronic components. An electronic circuit 13a includes the following (optional) components.

Memory 13.1 to store information like the address of the lighting device or operating parameters. Memory, in particular, can be implemented in a programmable read-only memory (PROM, EPROM (erasable permanent ROM, EPROM)0 and so on).

Module 13.2 switching, for example, by means of which may be interrupted connection between the external terminal 15a and organic LED 11. Such interruption, in particular, can occur if there is some failure such as a short circuit inside the organic LED 11 or somewhere in other place.

Module 13.3 connection, which provides one - way or bidirectional communication with external devices. M is Dul 13.3 connection is shown attached to the external terminal 15a for communication over the wire. Alternatively, the communication module can be attached to the terminal itself and/or may contain a receiver or transmitter for wireless communication via RF signals.

Converter 13.4 current, which converts the externally applied voltage at the required current for the excitation of the organic LED 11. The characteristics of this Converter, the choice may be dependent on the memory contents 13.1 or may be variable in some other way.

Sensor 13.5, such as a photodiode, which measures ambient light and provides the opportunity to adjust the brightness and/or color organic LED 11.

Module 13.6 control, attached to the aforementioned modules 13.1 through 13.5 and adapted for synchronization and control of their total operation. The control module, for example, may be implemented by a microcontroller.

In summary, the invention relates to a lighting device 10, 20 with a housing 12 that at least partially embeds the organic LED 11, 21 and the electronic circuit 13a, 13b, 23, which affects the flow of electric power from the external terminals 15a, 15b, 25 in organic LEDs. The electronic circuit may include a memory module, a communication module, sensor, etc. to enable the intelligent management of organic LED students of formation of the lighting device adaptable to possible changes in standards excitement.

In conclusion, emphasized that, in this application, the term "comprising" does not exclude other elements or steps, that the use of the singular does not exclude a plurality, and that a single processor or other unit may fulfill the functions of several means. The invention resides in each and every latest distinctive sign, as well as each and any combination of distinctive features. Moreover, the reference characters in the claims should not be construed as limiting its scope.

1. The lighting device (10, 20), adapted for removable installation in the appropriate cartridge (1)containing
a) organic LED (11, 21);
b) a housing (12, 22), which at least partially accommodates organic LEDs;
c) at least one external terminal (15a, 15b, 25) on the surface of the body;
d) an electronic circuit (13a, 13b, 23)located in the housing and containing passive and/or active electronic components that affect the energy flow from the external terminals in an organic LED.

2. The lighting device (10, 20) according to claim 1,
characterized in that the organic LED (11, 21) and the housing (12, 22) are connected, preferably, by means of a binder material to form a single structure.

3. The lighting device (10, 20) according to claim 1,
characterized in that the electrical wiring in the pension scheme (13a, 13b, 23) includes a programmable module (13.1) memory for storing information that identifies the device and/or which affects the circuit operation mode.

4. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) contains the module (13.2) switching to change the trace of the external terminals (15a, 15b, 25) in case of failure.

5. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) contains the module (13.3) connections for single or bi-directional communication with external devices.

6. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) contains the module (13.4) Converter for converting a voltage applied to the external terminal (15a, 15b, 25), in the current.

7. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) includes a sensor (13.5) for light, temperature, sound, and/or proximity of the object.

8. The lighting device (10, 20) according to claim 7,
characterized in that the operation mode of the electronic circuit (13a, 13b, 23) influences the sensor signal (13.5).

9. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) contains the module (13.6) to control the brightness and/or color organic LED (11, 21).

10. The lighting device (10, 20) according to claim 1,
characterized in that the electronic circuit (13a, 13b, 23) is located in the hollow body (12, 22).



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. Technical result is improvement of lighting efficiency for portable lighting devices. The claimed lighting device has a scrolling function that provides lighting of the observed area at which the user is concentrated at present and the lighted area is scrolled forward and backward during reading. The lighting device contains two varieties of light-emitting units, an illuminating substrate, a controller and a selector. The selector controls one variety of the light-emitting units which illuminate a part of the illuminating substrate capable to deflect light to a part of the observed surface.

EFFECT: selector is intended to select an operating mode for the lighting device in manual control mode and preset scrolling mode.

10 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electronic engineering. The driver configurations (100) drive first circuits (1) of organic light-emitting diodes (OLED), connected to leads (10) for a reference signal source and first output leads (11), and drive second circuits (2) of OLEDs, connected to first output leads (11) and second output leads (12). The driver configurations (100) comprise first/second elements (21/22), connected to first/second output leads (11) and leads (10) for a reference signal source, and first/second switches (31/32), connected to leads (14) for a power supply and first/second output leads (11, 12) for individual control of multi-level circuits (1, 2) of OLEDs. The switches (31, 32) and first elements (21) comprise transistors, and second elements (22) comprise transistors or diodes. The first/second elements (21/22) and first/second switches (31/32) are connected to each other and through first/second inductance coils (41/42) to first/second output leads (11/12).

EFFECT: simplification of the device.

15 cl, 27 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. Layout (1) of the circuit for light-emitting device includes the first branch (2) of the circuit for alternating voltage receipt which contains the first circuit (3) of light-emitting diodes (LEDs) connected in-series with the first phase-shifting element (4), the second branch (12) of the circuit connected in parallel to the first branch of the circuit, at that the second branch of the circuit contains the second LED circuit (13) connected in-series with the second phase-shifting element (14) in revere order in comparison with LED circuit and phase-shifting element in the first branch of the circuit, and the third branch (22) of the circuit containing the third LED scheme (23) connected in-between the first and second branches. With such circuit design current can be phase-shifted through the first and second LEDs in comparison with current passing through the third LED circuit so that the first and second LED circuits emit light within one period of time while the third LED circuit emits light within second period of time.

EFFECT: reducing blinking effect.

10 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: methods and apparatus for adjusting the colour or colour temperature of combined light emitted by one or more light-emitting diodes (LED) driven by a single pulsed stabilising circuit are disclosed. Properties of the light output are changed by intentionally varying a source voltage provided as an input to the stabilising circuit. The connection of different coloured LEDs in various branches of the pulsed stabilising circuit facilitates adjustment of the respective drive currents provided to the LEDs, and hence the colour or colour temperature of the resulting combined light, merely by adjusting the level of the source voltage of the stabilising circuit.

EFFECT: enabling change of colour or colour temperature of LEDs, which are part of a voltage stabiliser.

21 cl, 11 dwg

FIELD: physics.

SUBSTANCE: in one example, a modular lighting device (300) has an essentially cylindrically-shaped housing (320) including first openings (325) for providing an air path through the lighting device. A LED-based lighting assembly (350) is placed in the housing and has a LED module (360) including a plurality of LED light sources (104), a first control circuit (368, 370, 372) for controlling the light sources, and a fan (376) for providing a flow of cooling air along the air path. An end unit (330) is removably connected to the housing and has second openings (332). A second control circuit (384) is placed in the end unit and electrically connected to and substantially thermally isolated from the first control circuit. The lighting assembly is configured to direct the flow of cooling air towards said at least one first control circuit so as to effectively remove heat.

EFFECT: high reliability and improved performance of the lighting device.

14 cl, 12 dwg

FIELD: electricity.

SUBSTANCE: lighting device (100) contains one or more first lighting diodes (202) for formation of the first emission spectrum (503) and one or more second lighting diodes (204) for formation of the second different emission spectrum (505). The first and second light emitting diodes (LEDs) are connected electrically between the first unit (516A) and the second unit (516B) where sequence current (550) flows with feed of operating voltage (516) to the unit. Controlled path (518) of current flow is connected in parallel to one or both first and second LEDs in order to drain sequence current at least partially so that the first current (552) through first LED(s) and the second current (554) through LED(s) have different values. These technologies for current draining can be used to compensate offset of colour or colour temperature of formed light during heat transfer processes in result of different temperature-dependent current to flow ratios for different types of LEDs.

EFFECT: improving the efficiency.

16 cl, 8 dwg

FIELD: physics.

SUBSTANCE: light-emitting device has: a first electrode, a structured conducting layer which forms a set of electrode contact pads that are electrically insulated from each other, and a grid electrode surrounding the electrode contact pads, a dielectric layer situated between the layer of a first common electrode and the structured conducting layer, a plurality of light-emitting elements, each light-emitting element electrically connected between one of the electrode contact pads and the grid electrode so as to be connected in series with a capacitor comprising: one of said electrode contact pads, said dielectric layer and said first common electrode.

EFFECT: providing a light-emitting device with a plurality of light-emitting elements, wherein short-circuits occurring in one or more light-emitting elements have limited effect on functioning.

11 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: main idea is measurement or perception of levels of current or cycles of activation from pulse width modulation in the previous segment (N-1) in a chain of segment from LED excitation devices with associated LED chains, and control of current through the next segment (N) based on perceived current through the previous one. For example, each LED excitation device (10) can copy the same brightness adjustment level to the next segment, and thus, the same brightness adjustment can be obtained for several segments without any need for separate wiring for distribution of a brightness adjustment signal.

EFFECT: simplifying the device.

10 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: extended power supply distributor (100) is made as capable of supplying power to OLED instruments (104). It comprises a set of power supply elements (102) arranged along the power distributor (100). Each of power supply elements (102) is made as capable of supplying to a large extent identical working currents or voltages to the OLED instrument (104), and a facility for mechanical attachment of the power distributor (100) to the OLED instrument (104).

EFFECT: facilitated connection of power distribution with OLED instruments with provision of light emission by it with homogeneous brightness.

14 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: system to control LED lamp power supply comprises a LED controller (58); multiple LED channels (60), in the working position connected with the LED controller (58). Each of many LED channels (60) comprises a channel switch (62) arranged in series with at least one shunted LED circuit (83). Besides, the shunted LED circuit (83) comprises a shunt switch (68), arranged in parallel with a LED source (80). The LED controller (58) reduces power loss in the channel switch (62) or the shunt switch (68), when the power loss (Ploss) in electronic circuits of the LED lamp exceeds the power loss limit (Plim) in electronic circuits of the LED lamp; and each of channel switches (62) receives a signal (63) of channel switch control from the LED controller (58), and each of shunt switches (68) receives a signal (69) of shunt switch control from the LED controller (58). Versions are also described to control power supply of a LED lamp.

EFFECT: increased efficiency of light generation.

21 cl, 4 dwg

FIELD: mechanics, physics.

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

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

3 dwg

FIELD: physics.

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

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

3 cl, 2 dwg

FIELD: physics.

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

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

10 cl, 9 dwg

FIELD: physics.

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

EFFECT: higher stability of operation.

20 cl, 2 dwg, 1 tbl

FIELD: physics.

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

EFFECT: fewer switches.

20 cl, 4 dwg

FIELD: physics.

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

EFFECT: simplification.

16 cl, 4 dwg

FIELD: physics.

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

EFFECT: improved method.

25 cl, 6 dwg

FIELD: physics.

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

EFFECT: reduced volume of memory space required.

3 cl, 3 dwg

FIELD: physics.

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

EFFECT: fewer circuit components.

13 cl, 8 dwg

FIELD: electricity.

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

EFFECT: reducing the number of circuit components.

15 cl, 5 dwg

Up!