Led driving apparatus

FIELD: physics, optics.

SUBSTANCE: LED driving apparatus (1) includes a structure (10) for transmitting a signal to LEDs (11, 12). The LEDs (11, 12) include different internal impedances (41, 42) for generating different light outputs under the action of a signal parameter having different values, as a result of which the LEDs (11, 12) can be driven relatively independent of each other. Different light outputs can have different intensities in order to reduce light intensity and/or different colours in order to vary colour. The parameter may include a frequency parameter and/or a time parameter. The LEDs (11, 12) may form parts of a series branch, e.g. when they are stacked organic LEDs, or may form parallel branches. The internal impedances (41, 42) may include capacitances (21, 22) and resistivities (31, 32).

EFFECT: simple device for individual driving of light-emitting devices.

15 cl, 3 dwg

 

The technical field to which the invention relates

The invention relates to a device for excitation of light emitting diodes comprising structure for the signal group from the first and second light emitting diodes, and also relates to a device comprising such a device and to a method of excitation light-emitting diodes.

Examples of such devices are lamp comprising light-emitting diodes, and examples of such a device are consumer and non-consumer goods.

The prior art inventions

The document US 2008/0116818 reveals the modulation time division and regulating the average current for independent control of arrays of light emitting diodes. In addition, as shown in Figure 7 of US 2008/0116818 requires a multiplexer with a temporary seal, the multiplexer with the current sensor, the multiplexer with a voltage detector, an analog-to-digital Converter, a comparator, some control logic circuitry and devices for excitation.

The invention

The objective of the invention is the provision of a relatively simple device for relatively individual excitation light-emitting devices. The next task of the invention is the provision of a device comprising such a device is in. Another object of the invention is the provision of relatively simple way for an individual excitation light-emitting diodes.

In accordance with the first aspect is provided a device for excitation of light emitting diodes comprising structure for the signal group from the first and second light emitting diodes, in which

the first light-emitting diode includes a first internal impedance in order under the action parameter of the signal having the first value, to produce a first light output, and that under the action parameter having a second value, different from the first value to produce a second light output;

the second light-emitting diode includes a second internal impedance different from the first internal impedance, so that under the action parameter having the first value, to generate the third light output, and that under the action parameter having a second value to generate a fourth light output;

the first ratio is defined as the first light output divided by the second light output, a second ratio is defined as the third light output divided by the fourth light output, and the first ratio is different from the second relationship

In view of the fact that the first and second light emitting diodes include a variety of internal impedance and the first ratio is different from the second relationship, the first light-emitting diode can respond well to first change the parameter value signal is compared with the second light emitting diode and the second light-emitting diode can respond perfectly to the second modification of the parameter value signal is compared with the first light-emitting diode. In other words, by feeding the signal to the first and second light emitting diodes, these light-emitting diodes can be actuated individually relatively to each other.

The fact that the first (second) light emitting diode includes a first (second) internal impedance in order under the action parameter with the first/second value to produce a first/second (third/fourth) light output can be considered similar to that of the first (second) light emitting diode that includes a first (second) internal impedance in order under the action parameter with the first/second value, to need in the first/second (third/fourth) the amount of capacity and/or energy in accordance with the third relation can be defined as the first amount of power and/or energy, delenn the e on the second amount of power and/or energy in accordance with the fourth ratio can be defined as the third amount of power and/or energy divided by the fourth amount of power and/or energy, and the third ratio is different from the fourth relationship.

In accordance with the embodiment of the device is determined by each light output having an intensity and/or color. Different light outputs will have different intensities and/or different colors. Preferably, the device is determined by the first relationship that is different from the second relation in view of the fact that the difference in the intensities of the first and second light outputs differs from the differences in the intensities of the third and fourth light output, and/or that the difference between the colors of the first and second light outputs differs from the differences between the colors of the third and fourth color outputs. The differences between the intensities correspond to the decrease in the light intensity of one light-emitting diode to a greater or lesser degree compared to the other, in other words, to reduce the light power light-emitting diodes relative to the individual. The differences between the colors correspond to the color change of one of the light emitting diodes to a greater or lesser degree compared to the other, in other words, the color change light-emitting diodes from siteline individually.

In accordance with the embodiment of the device is determined by the structure, which is made for selecting at least one of the parameter values to control the excitation of at least one of the first and second light emitting diodes. The selection enables the control of the excitation light-emitting diodes relative to the individual way. Preferably, the device defines the management, including adaptation intensity and/or color adaptation. The intensity of one of the light emitting diodes can be adjusted relatively independently of the intensity of other light emitting diodes. The color of one of the light emitting diodes can be adapted relatively independently of another color of light-emitting diodes.

In accordance with the embodiment of the device is determined by the parameter includes a frequency parameter and/or a time parameter. The frequency parameter can be the frequency of the signal or part of the signal, such as pulse and a time parameter can be the duration or duty cycle of the signal or part of the signal, such as a pulse.

In accordance with the embodiment of the device is determined by the first and second light emitting diodes, which form part of a coherent vet is. Preferably, the device is defined by the first and second light emitting diodes, which are folded organic light-emitting diodes. More preferably, the device is defined by folded organic light-emitting diodes, which are separated by a transparent electrode, which is electrically connected to the structure using at least one of the organic light-emitting diodes. Electrodes between the folded organic light-emitting diodes is less available than the electrodes above and below the stacked organic light-emitting diodes. Thus, in particular, for stacked organic light-emitting diodes may be of interest excitation of groups of light-emitting diodes relative to the individual, thus giving only one adaptive signal group.

In accordance with the embodiment of the device is determined by the corresponding first and second light emitting diodes forming part of the respective first and second parallel branches.

In accordance with the embodiment of the device is determined by the first internal impedance comprising a first capacitance and a first resistivity, a second internal impedance, which includes the second tank and the second specific resistance is, the first and second capacitors have different values and/or the first and second resistivity have different values. This combination of capacitance and resistivity may be in parallel connection with more than check/less transmissive characteristic below the cutoff frequency and having more transmissive/less delay characteristic above this cutoff frequency.

In accordance with the embodiment of the device is determined by the inclusion of

first external impedance connected to the first light-emitting diode, and

- second external impedance connected to the second light-emitting diode.

This first (second) external impedance can improve the efficiency of the first (second) internal impedance and/or add additional efficiency for the first (second) internal impedance. The first (second) external impedance may be connected in series or in parallel with the first (second) internal impedance.

In accordance with a second aspect is provided a device that includes the device and a power source for supplying power to the device.

In accordance with a third aspect is provided a method of excitation light-emitting diodes, VK is uchumi the phase of the signal group from the first and second light emitting diodes, in which

the first light-emitting diode includes a first internal impedance in order under the action parameter of the signal having the first value, to produce a first light output, and that under the action parameter having a second value, different from the first value to produce a second light output;

the second light-emitting diode includes a second internal impedance different from the first internal impedance, so that under the action parameter having the first value, to generate the third light output, and that under the action parameter having a second value to generate a fourth light output;

the first ratio is defined as the first light output divided by the second light output, a second ratio is defined as the third light output divided by the fourth light output, and the first ratio is different from the second relationship.

A full understanding can match what the value of the impedance may depend on a parameter value signal to the impedance.

The main idea may be that different light-emitting diodes must have a different internal impedance to respond differently to different values of p the parameter signal, supplied to the light emitting diodes.

The problem consisting in the provision of a relatively simple device for relatively individual excitation light-emitting diodes, has been resolved.

Another advantage may be that the number of connections in the device can be reduced.

These and other aspects of the invention are well clear and will be explained with reference to the option(s) described(s) next.

Brief description of drawings

In the drawings:

Figure 1 depicts a device comprising a device for excitation of light emitting diodes

Figure 2 depicts the internal impedance of the light-emitting diodes, and

Figure 3 depicts a plot of the current versus frequency for each internal impedance.

Detailed description of embodiments

Figure 1 shows the device 3, which includes a device for excitation light-emitting diode 1 which is connected to the power source 2, such as a battery or Converter. The device 1 comprises a structure 10 for the signal, such as a current signal or voltage signal) to the group from the first and second light-emitting diodes 11 and 12 connected here consistently. Alternatively, these light-emitting diodes can be connected in parallel. One should not exclude the more than two light-emitting diodes. A series connection of first and second light-emitting diodes 11 and 12 may be folded organic light-emitting diodes separated by a transparent electrode, which are sequentially connected to the structure 10, at least one of the organic light-emitting diodes. Electrodes between the folded organic light-emitting diodes less affordable in comparison with electrodes at the end of the stacked organic light-emitting diodes, and therefore may be interested in the possibility of bringing in the action of the group of light-emitting diodes for individually when applying only one adaptive signal group.

Figure 2 (simplified) corresponding first and second internal impedance 41 and 42 of the respective first and second light-emitting diodes 11 and 12 are depicted. The first internal impedance 41 includes a first container 21 and the first resistivity 31 (resistance or resistor)connected in parallel. The second internal impedance 42 includes a second tank 22 and the second resistivity (resistance or resistor)connected in parallel. The first and second tanks 21 and 22 have different values and/or the first and second specific resistance 31 and 32 have different values.

Figure 3 shows the graph of the dependence of current (in mA) frequency (in kHz) for each of the full internal resistances 41 and 42. The current passing through the tank 21, designated 21', the current passing through the tank 22, designated 22', the current passing through the resistivity 31, designated 31', and the current passing through the resistance 32, designated 32'. The cutoff frequency of the internal impedance 41 designated 41', and the cutoff frequency of the internal impedance 42 designated 42', thereby taking that first tank 21 has a value of 10 nF, the second tank 22 is set equal to 5 nF, each of the specific resistances 31 and 32 has a value of 4 ohms, which leads to the fact that the internal impedance 4 is a cut-off frequency is 4 kHz, and the second internal impedance 42 has a cutoff frequency equal to 8 kHz (f=1/2πRC).

The first light-emitting diode 11 includes a first internal impedance 41, so that under the action parameter of the signal having the first value, to produce a first light output, and that under the action parameter having a second value, different from the first value to produce a second light output. The second light-emitting diode 12 includes a second internal impedance 42 to under the action parameter having the first value, to generate the third light output, and that under the action parameter having a second value, wirapati is the substance of the fourth light output. The first ratio is defined as the first light output divided by the second light output, a second ratio is defined as the third light output divided by the fourth light output. The first and second internal impedance 41 and 42 are different from each other so that the first ratio is different from the second relationship, and/or the first and second internal impedance 41 and 42 react differently on different values and/or parameter change signal so that the first ratio is different from the second relationship. As a result, by selecting different values of the parameter signal to the first and second light-emitting diodes 11 and 12 can apply for individually.

Each light output may have an intensity and/or color. The first ratio may differ from the second relation in view of the fact that the difference between the intensities of the first and second light outputs is different from the difference between the intensities of the third and fourth light output and/or the difference between the colors of the first and second color different outputs from the difference between the colors of the third and fourth light output.

The structure 10 may be so designed as to when choosing at least one of the parameter values, to control the excitation of at least one of the first and second with etoileui diodes 11, 12. The choice allows you to control the excitation/reference to light-emitting diodes relative to the individual way. The above-mentioned control may include the adaptation of the intensity and/or color adjustment. The parameter may include a frequency parameter and/or a time parameter. Thus, the structure 10, for example, converts the primary voltage or primary voltage alternating current in the secondary signal, such as current or voltage. This secondary signal is an adaptive parameter, such as adaptive frequency secondary signal, or such as adaptive pulse frequency of the secondary signal, or such as adaptive duration of the secondary signal, or such as adaptive pulse duration of the secondary signal, or such as adaptive duty cycle of the secondary signal or such as adaptive duty cycle of the secondary pulse signal, etc., In the embodiment depicted in Figure 3, the secondary signal is alternating current at various frequencies. Thus, the structure 10 produces a secondary signal with an adaptive parameter, and the structure 10 can change this adaptive parameter. Preferably, the structure 10 may control the excitation of at least one of the first and second light emitting diodes 11, 12, when used in the form of a choice given the option by the person or any other nasobrahan element.

Summarizing, we can say that the device for the excitation light-emitting diode 1 includes a structure 10 for supplying the signal to the light emitting diodes 11, 12. Light-emitting diodes 11, 12 include various internal impedance 41, 42 to generate different light outputs when the option signal having different values. As a result, the light emitting diodes 11, 12 can be aroused relatively independently from each other. Each light output may have an intensity and/or color. Different light outputs can have different intensities in order to reduce the forces of light and/or different colors to change the colors. The parameter may include a frequency parameter and/or a time parameter. Light-emitting diodes 11, 12 may form part of a coherent branch, for example, when are folded organic light-emitting diodes, or may form parallel branches. Internal impedance 41, 42 may include tanks 21, 22 and resistivity 31, 32.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description should be considered as explanatory or exemplary and not restrictive; the invention is not limited to the disclosed variants of implementation. For example, POS is but to apply the invention to the embodiment, in which different parts of the various disclosed embodiments are combined in a new version of the implementation.

Other variations of the disclosed embodiments can be understood and implemented by experts in the field of technology with the use of the invention described by the claims, the study of the drawings, disclosure and appended claims. In the claims the term "comprising" does not exclude other elements or steps, and the use of the singular does not exclude a plurality. A single processor or other element can fully perform the functions of several items listed in the claims. By itself, the fact that certain values are in mutually different dependent claims, yet indicates that the combination of these values cannot be used as an advantage. The computer program may be stored/distributed on a suitable medium such as an optical storage device or semiconductor media, which are provided together with or as part of other hardware, but may also be distributed in other ways, such as through the Internet or other wired or wireless telecommunication systems. Any reference numbers in the formula the image is to be placed should not be understood as limiting the scope.

1. A device for excitation of light emitting diodes comprising structure for the signal group from the first and second light emitting diodes, in which
the first light-emitting diode includes a first internal impedance in order under the action parameter of the signal having the first value, to produce a first light output, and that under the action parameter having a second value, different from the first value to produce a second light output;
the second light-emitting diode includes a second internal impedance different from the first internal impedance, so that under the action parameter having the first value, to generate the third light output, and that under the action parameter having a second value to generate a fourth light output; and
the first ratio is defined as the first light output divided by the second light output, and the second ratio is defined as the third light output divided by the fourth light output, and the first ratio is different from the second relationship, the first and second light emitting diodes are folded organic light-emitting diodes that form part of a coherent branch.

2. The device according to claim 1, in which each Saint is postal outlet has the intensity and/or color.

3. The device according to claim 2, in which the first ratio is different from the second relation in view of the fact that the difference between the intensities of the first and second light outputs is different from the difference between the intensities of the third and fourth light output and/or the difference between the colors of the first and second color different outputs from the difference between the colors of the third and fourth light output.

4. The device according to claim 1, in which the structure is made in order in response to selection of at least one of the parameter values to control the excitation of at least one of the first and second light emitting diodes.

5. The device according to claim 4 in which the said management involves adapting the intensity and/or adaptation of color.

6. The device according to claim 1, wherein the parameter includes a frequency parameter and/or a time parameter.

7. The device according to claim 1, in which the stacked organic light-emitting diodes are separated by a transparent electrode, which is electrically connected with the structure, at least one of the organic light-emitting diodes.

8. The device according to claim 1, in which the respective first and second light emitting diodes forming part of the respective first and second parallel branches.

9. The device according to claim 1, in which the first internal impedance on what comprises a first capacitance and a first resistivity, the second internal impedance includes a second tank and a second resistivity, and the first and second capacitors have different values and/or the first and second resistivity have different values.

10. The device according to claim 1, further comprising
the first external impedance connected to the first light-emitting diode, and
- second external impedance connected to the second light-emitting diode.

11. The device comprising the device according to claim 1 and a power source for supplying energy to the device.

12. The method of excitation light-emitting diodes, comprising the step signal group from the first and second light emitting diodes, in which
the first light-emitting diode includes a first internal impedance in order under the action parameter of the signal having the first value, to produce a first light output, and that under the action parameter having a second value, different from the first value to produce a second light output;
the second light-emitting diode includes a second internal impedance different from the first internal impedance, so that under the action parameter having the first value, to generate the third light output, and for the CSOs, so that under the action parameter having a second value to generate a fourth light output;
the first ratio is defined as the first light output divided by the second light output, and the second ratio is defined as the third light output divided by the fourth light output, and the first ratio is different from the second relationship, the first and second light emitting diodes are folded organic light-emitting diodes that form part of a coherent branch.

13. The method according to item 12, in which each light output has the intensity and/or color, and the first ratio is different from the second relation in view of the fact that the difference between the intensities of the first and second light outputs is different from the difference between the intensities of the third and fourth light output and/or that the difference between the colors of the first and second color different outputs from the difference between the colors of the third and fourth light output.

14. The method according to item 12, in which the respective first and second light emitting diodes forming part of the respective first and second parallel branches.

15. The method according to item 12, in which the first internal impedance includes a first capacitance and a first resistivity, a second internal impedance includes the second is technology and the second resistivity, the first and second capacitors have different values and/or the first and second resistivity have different values.



 

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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: 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

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