Light-emitting device

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

 

The present invention relates to light-emitting devices with an agent and a flat light-emitting element with internal capacity.

It is known that the integration of passive filters is a key technology for electronic circuits high degree of integration, because passive filters usually require more than 2/3 of the space of conventional schemes. This is especially important for applications that require extremely low construction height, such as a thin flat-panel displays (plasma display, liquid crystal displays and so on). In many known electrical devices, such as mobile devices require voltages that are different from the DC voltage provided by, for example, from a battery. To convert the voltage effectively used, in particular, passive filters, such as capacitors and inductors. For example, the use of thin inductors for surface mounting (SMT). Such inductors SMT are usually provided with plastic mounting contacts for mounting the device on a printed circuit Board (PCB).

In document EP 05106924.3 disclosed light emitting device with integral sealing agent having a multilayer structure in which a fully integrated passive filtreeritud flat pathogens with integrated passive filters, consisting of LC (L is the coil inductance, C is the capacitor) combinations to filter distortion.

In document WO 86/05304 disclosed inverter power low-voltage power supply for an electroluminescent device.

In document EP 0492 362 disclosed a circuit for electroluminescent element.

In the document US 2003/0071821 disclosed the compensation of the luminance signal for emission displays.

In the document US 6 351 204 disclosed a thin magnetic element and the transformer.

The aim of the invention is to improve the above-mentioned light-emitting device. In particular, the aim of the present invention is to provide a light emitting device with reduced thickness.

This goal is achieved by the light-emitting device according to p. 1 of the claims.

Accordingly, the proposed light-emitting device with the pathogen and the planar light-emitting element. The pathogen adapts the available supply voltage to the desired current of the light-emitting element. The causative agent is planar and contains a multilayer structure and may be connected to the source and connected to the rear side of the light-emitting element and light emitting element having an internal capacity connected with the said exciter in such a way that internal capacity is passive exposure is the principal filter of the pathogen.

One of the essential ideas of the present invention is based on the fact that you are using the internal capacity of the light-emitting element, providing the possibility of eliminating or reducing the passive output filter of the pathogen, which contains the electronic circuit of the exciter. Thus can be implemented in the system of the light-emitting device with optimized form factor using the flat of the pathogen. Elimination or reduction of the output capacitance reduces the number of components of the pathogen or its volume and weight. Therefore, to achieve high power density, low manufacturing costs and increased reliability.

Preferably, the inner receptacle is part of the output filter of the pathogen. In the preferred embodiment of the light emitting device is a passive output filter of the pathogen is an inductor and/or capacitor. The preferred way exciter formed flat, contains a multilayer structure, the inductor includes a substrate with first and second side, a winding and a core of soft-magnetic material and a coil embedded in the substrate, and the core contains a first layer of soft-magnetic material which is placed on a first side of the substrate, and a second layer of soft-magnetic mother is La, which is located on the second side of the substrate so that the winding is at least partially covered with a first layer of soft-magnetic material and a second layer of magnetically soft material. Therefore, it may be provided with a very thin pathogen with integrated coils. In addition, the agent according to the sample embodiment of the present invention has a simple construction which can be manufactured at reduced cost. You do not need to provide any specially formed the core of cylindrical shape. This makes the agent according to the present invention suitable for mass production. In addition, the best way this inductor is very reliable because its magnetic core consists of layers of soft-magnetic material provided on the substrate. Increased reliability can also be ensured due to the fact that it does not require any solder joints between the inductor and the substrate.

According to a preferred embodiment of the present invention an insulating layer provided between the first layer of soft-magnetic material and the first side of the substrate and between the second layer of magnetically soft material and the second side of the substrate. Layers of soft-magnetic material can be made is made of metal with high permeability, such as µ-metal, amorphous metal or nanocrystalline metal. In addition, possible materials such as ferrite polymer compound (FPC), powder iron cores or layers of sintered ferrite. The thickness of the metal layers may be very small, such as in the range from 20 μm to 500 μm.

According to a preferred embodiment of the present invention the light-emitting element is an organic light emitting diode (OLED). The OLED device is a large area with an extremely thin organic layers. Therefore, the internal capacity of the OLED is relatively high. Internal capacity is in the range from 10 to 1000 pF/mm2. The result can be achieved, at least, a significant reduction of the output capacitance of the pathogen. A key distinguishing advantage of OLED is the form factor is very thin and flat design. Preferably, the exciter is connected to the rear side of the aforementioned OLED. The functional result of the invention the technical fact that OLED can be made bendable or flexible by itself, can be used in order to be distinctive in the design of the pathogen, which is the same bendable or flexible as OLED. Thus, a ready light-emitting device becomes eventually bendable or flexible, that is knowledge is sustained fashion advantage for the large number of possible technical applications. The combination of flat design and high flexibility results in a very flat and effective device.

Capacity in combination with the feature enabled OLED leads to self-discharge with a time constant τOLEDthat is in the range from about 50 NS to 25 μs. Thus, the causative agent of the OLED may be a power source switching for high efficiency. The pathogen can be mounted on the rear side of the OLED, enabling the achievement of excellent form factor. A further advantage of the invention is that the lamp covering a large area, consists of one large tile or a number of small cells. The present invention allows to equip each individual OLED tile one flat pathogen or each cell OLED her own flat pathogen. These cells can be connected in parallel, in series or in a combination of both methods.

Preferably, the light-emitting element, the pathogen and its elements are so thin that they are bendable or flexible. Preferably, the invention can be applied to many different topologies. The preferred way exciter includes a DC-to-DC (DC-to-DC). For supply voltage, which is higher than the diode voltage is e OLED, can be applied step-down Converter with current control. For supply voltage, which is lower than the diode voltage can be applied boost Converter with current control. In the case of high differences between the supply voltage and the diode voltage can be used in a flyback Converter with integrated transformer. Can be applied to other converters, such as intermediate booster Converter, a direct Converter, SEPIC Converter, ùk Converter, push-pull Converter, half-bridge Converter, polomosnovos Converter or a resonant Converter. Each Converter can be equipped with cascade control, so that the output of each cell OLED can be individually controlled. It is important to reduce the forces of light and colour management with the appropriate invention OLED. Mentioned flat exciter contains a passive output filter to reduce the output voltage and ripple current. Capacitance and inductance in combination with the switching frequency of the exciter OLED determine the ripple voltage. This means that for a given switching frequency output capacitive filter or inductive-capacitive filter can be designed in such a way that maksimalnaya ripple voltage is not exceeded. It was found that the high switching frequency allows to eliminate the output capacity by using internal capacity OLED. These frequencies depend on the lighting that is used. For lower switching frequencies output capacity cannot be removed completely, but only partially. Thus implemented, the causative agent of high power density with excellent form.

The light emitting device according to the present invention can be used in a variety of systems, including systems which are systems household application systems, shop lighting, home lighting systems, accent lighting, local lighting systems, fiber-optic applications, projection systems, display systems with Samotsvety, segmented display systems, warning signs, lighting systems medical use, display systems, mobile phones, flat signs, decorative lighting systems or electronic systems in a flexible environment, such as textiles and other clothing items.

The above-mentioned components, as well as claimed components and the components that should be used in accordance with the invention in the described embodiments, not on who are no special restrictions with regard to their size, form, material selection and technical principle, so that the selection criteria known in the right area, can be applied without restrictions.

Additional details, characteristics and advantages of the object of the invention disclosed in subordinate clauses and in the subsequent description of the relevant drawings, in which for example shows the preferred embodiment of the light-emitting device according to the invention.

Figure 1 shows a schematic representation of a light-emitting device according to the first embodiment of the present invention,

Figure 2 shows the embodiment of the light-emitting device, including his agent,

Figure 3 shows another embodiment of the light-emitting device, including his agent,

Figure 4 shows a schematic representation of the pathogen appropriate for the invention of the light-emitting device, and

Figure 5 shows a possible connection of the pathogen with OLED light-emitting device.

Figure 1 illustrates the light emitting device 1 with the exciter 10 and a flat light-emitting element 20. The light emitting device 1 emits light in a downward direction. According to the shown embodiment of the flat light-emitting element 20 is an OLED. Full light-emitting device 1 may consist of a flexible/bendable layers placed layers is.

Figure 4 shows a possible embodiment of the exciter 10. Exciter 10 is planar and contains a multilayer structure. Further, the causative agent 10 has one passive output filter 1la, in order to adapt the available supply voltage to the desired current of the light emitting element 20. Output filter 1la is the inductor 11a containing substrate 12 with the first and second side. Within substrate 12 has two winding 15. The winding 15 is embedded in the substrate 12 and thus form an integral part of the substrate 12. Core inductors 11a formed layers 13, 14 of soft-magnetic metal, is placed on the first and second sides of the substrate 12 so that the winding 15 is at least partially covered with a soft-magnetic layers 13, 14.

The substrate 12 is a flexible substrate, such as a flexible foil, and due to the fact that the use of layers 13, 14 of soft-magnetic material, and not sintered ferrites, as is known in the art, may be provided with bendable and flexible inductor 11a. Flexibility additionally improves due to the fact that the magnetic core, that is, the layers 13, 14 of soft-magnetic material, has a very small thickness.

As illustrated in figure 4, the insulating layer 16 is provided between the first layer 13 of soft-magnetic material and the first side of the substrate 12 and between the second the layer 14 of soft-magnetic material and the second side of the substrate 12. The winding 15 is embedded in a flexible polyimide substrate. Winding 15 of the inductor is made as a spiral winding of copper layers deposited on polozka 12. To improve adhesion of the layers 13, 14 of soft-magnetic material to the surfaces of the flexible foil 12, the layers 13, 14 of soft-magnetic material can be silication on the corresponding surface for deposition on a substrate 12. On the right side shows the exciter 10 figure 4 further illustrates the electronic components, such as controller 18, and the MOS transistor 17.

Figure 2 shows the embodiment of the light-emitting device 1 in which the activator 10 is connected to the source 2 and the OLED 20. Exciter 10 includes a MOS transistor 17, which is connected to the controller 18. In addition, the causative agent 10 includes one passive output filter 11a in the form of an induction coil 11a and the second passive output filter 11b in the form of a capacitor. Exciter 10 is connected to the OLED. When operating the light-emitting device 1 internal capacity 21 serves as an additional passive filter. The preferred way, using internal capacity 21 OLED 20, you can significantly reduce the capacity of the output filter 11b of the exciter 10. Thus, using the exciter 10 can be implemented in the light emitting device 1 with the optimized form of thin, flat or flexible design.

Figure 3 shows another embodiment of the present invention, in which the capacity of the output filter mentioned exciter 10 can be completely removed.

In this case referred to the exciter 10 includes only one passive output filter 11a, which is the inductor 11a. As in figure 2, the exciter 10 is connected to the source 2 and the OLED 20. The value of the internal capacity of the OLED 20, which are not shown explicitly in figure 3, is sufficient to completely eliminate the passive output capacity of the exciter 10.

Exciter 10 supply the OLED 20, which may be the only OLED 20, sequence or near the United OLED 20 (fig.5b), a set of parallel-connected OLED (figs) or schema OLED 20 (fig.5d and five). Serial and parallel connection of the OLED 20 does not change much full time constant. Preferably, the OLED 20 is powered by a DC voltage (DC) or DC current. Therefore, the exciter 10 converts the voltage or current source in a regulated DC voltage or current.

1 light-emitting device

2 source

10 pathogen

11a passive output filter inductor

11b passive output filter capacitor

12 substrate

13 the first layer of magnetically soft material

14, the second layer of magnetically soft material

15 winding

16 and airoldi layer

17 MOS transistor

18 controller

20 light-emitting element OLED

21 internal capacity of the light-emitting element

1. Light-emitting device (1) with the pathogen (10) and a flat light-emitting element (20)and the pathogen (10) is planar and contains a multilayer structure, and is connected to the rear side of the light-emitting element (20), and moreover, the light-emitting element (20)having an internal capacity (21), connected to the said exciter (10) so that the inner receptacle (21) serves as a passive output filter of the pathogen (10).

2. Light-emitting device (1) according to claim 1, characterized in that the exciter (10) contains a passive output filter (11a, 11b), with the inner container (21) is part of the passive output filter (11a, 11b) of the pathogen (10).

3. Light-emitting device (1) according to claim 2, characterized in that the output filter (11a, 11b) of the pathogen (10) includes an inductor (11a) and/or capacitor (11b).

4. Light-emitting device (1) according to claim 3, characterized in that the inductor (11) includes a substrate (12) with first and second side winding (15) and a core of soft-magnetic material and a coil (15) is integrated in the substrate (12), while the core contains a first layer (13) of soft-magnetic material which is placed on the first side of the substrate (12), and a second layer (14) magni is but soft material, which is located on the second side of the substrate (12) in such a way that the winding (15)at least partially covered with the first layer (13) of soft-magnetic material and a second layer (14) of soft-magnetic material.

5. Light-emitting device (1) according to claim 4, characterized in that the insulating layer (16) is provided between the first layer (13) of soft-magnetic material and the first side of the substrate (12) and between the second layer (14) of soft-magnetic material and the second side of the substrate (12).

6. Light-emitting device (1) according to claim 5, characterized in that the capacitor (11b) is placed, at least one layer of said exciter (10)with the aforementioned insulating layer (16) is provided between the inductor (11a) and a capacitor (11b).

7. Light-emitting device (1) according to any one of the preceding paragraphs, characterized in that the light-emitting element (20) is an OLED.

8. Light-emitting device (1) according to claim 1, characterized in that the light-emitting elements (20) are a sequence of series-connected light-emitting elements (20), a stack of parallel-connected light-emitting elements (20) or light-emitting circuit elements (20).

9. Light-emitting device (1) according to claim 1, characterized in that the light-emitting element (20), the pathogen (10) and its elements (11a, 11b, 12, 13, 14, 15, 16) performed so that is Kimi, they are bendable or flexible.

10. Light-emitting device (1) according to claim 1, characterized in that the inner container (21) is in the range from 10 pF/mm2up to 1000 pF/mm2.



 

Same patents:

FIELD: physics.

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

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

3 cl, 2 dwg

FIELD: mechanics, physics.

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

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

3 dwg

FIELD: mechanics, physics.

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

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

3 dwg

FIELD: physics.

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

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

3 cl, 2 dwg

FIELD: physics.

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

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

10 cl, 9 dwg

FIELD: physics.

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

EFFECT: higher stability of operation.

20 cl, 2 dwg, 1 tbl

FIELD: physics.

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

EFFECT: fewer switches.

20 cl, 4 dwg

FIELD: physics.

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

EFFECT: simplification.

16 cl, 4 dwg

FIELD: physics.

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

EFFECT: improved method.

25 cl, 6 dwg

FIELD: physics.

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

EFFECT: reduced volume of memory space required.

3 cl, 3 dwg

FIELD: physics.

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

EFFECT: fewer circuit components.

13 cl, 8 dwg

FIELD: electricity.

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

EFFECT: reducing the number of circuit components.

15 cl, 5 dwg

Up!