KR20150020869A - Lighting device using organic electro-luminescent device - Google Patents

Abstract

The present invention relates to a light emitting device and, more particularly, to a lighting apparatus using an organic light emitting device for improving light extraction efficiency. The present invention includes a circuit board, a plurality of organic light emitting device panels which are electrically connected on the circuit board to form equi-potential, and a light extraction panel which is located on the organic light emitting device panels and includes a light extraction pattern.

Description

Technical Field [0001] The present invention relates to a lighting device using an organic electroluminescent device,

The present invention relates to a light emitting device, and more particularly, to a lighting device using an organic light emitting device.

The organic light emitting device is formed by injecting electrons and holes from the cathode and the anode into the light emitting layer to inject electrons and holes hole is coupled to an exciton which emits light when the exciton falls to a ground state.

Such organic light emitting devices have high-quality panel characteristics that exhibit low power, high brightness, high reaction speed, and low weight, and can be used in most electronic applications such as mobile communication terminals, CNS (car navigation systems) It is considered as a next generation display.

Further, the illumination using the organic light emitting device is considered as one of the lighting candidates to replace the incandescent lamp and the fluorescent lamp together with the light emitting diode (LED) illumination, and research and development thereof is being conducted.

An object of the present invention is to provide an illumination device using an organic light emitting device capable of improving light extraction efficiency.

Another object of the present invention is to provide a lighting device using an organic light emitting device capable of improving reliability by providing a modulated light emitting portion.

According to an aspect of the present invention, A plurality of organic light emitting diode panels electrically connected to each other on the circuit board so as to have the same potential; And a light extracting panel disposed on the plurality of organic light emitting device panels and including a light extracting pattern.

Here, the circuit substrate and the plurality of organic light emitting device panels disposed on the circuit substrate may be configured in a modular fashion.

At this time, the modular circuit board may be connected to each other by a connector.

The modular circuit board may include a driving circuit for driving the OLED panel.

Here, the light extracting panel may be integrated to cover the plurality of organic light emitting diode panels.

Here, the light extracting panel may be in contact with the organic light emitting device panel.

In this case, the light extracting panel may include a bubble region that does not contact the organic light emitting device panel.

In addition, a paint layer or a mask layer for masking light may be provided in the bubble region.

Here, the light extracting pattern may be at least one of a microlens array, a bead, and a matrix pattern.

Here, a light emitting diode may be further provided on one side of the circuit board where the OLED panel is located.

The present invention has the following effects.

First, when such an integrated light extraction panel is applied as a front cover of an illumination device, not only the light efficiency and lifetime of the organic light emitting device light source can be improved, but even when the organic light emitting device panel is broken due to external impact, It is advantageous for user safety because it is trapped inside the panel.

In addition, the light emitting unit including the organic light emitting device panel may be modularized to easily replace the organic light emitting device panel when a problem occurs in some of the organic light emitting device panels, and can be replaced on a module basis.

On the other hand, the driving circuit portion can be designed so that the entire circuit can be separately designed in a narrow space formed by the lighting device, and their electrical characteristics can be maintained.

Particularly, the PFC circuit and the DC / DC converter of the power unit, which can generate a lot of heat, can be disposed on the driver IC to prevent a decrease in electrical characteristics due to heat generation.

1 is a schematic view showing an example of a lighting apparatus using an organic light emitting element.
2 is a schematic view showing another example of a lighting apparatus using an organic light emitting element.
3 is a side view showing an example of a lighting apparatus using an organic light emitting element.
4 is an exploded view showing an example of a lighting apparatus using an organic light emitting element.
5 is a perspective view showing an example of a modulated light emitting portion.
6 is a schematic view showing still another example of a lighting apparatus using an organic light emitting element.
Fig. 7 is a block diagram showing a configuration of a driving circuit for driving the lighting device.
8 is a schematic view showing an example of the system configuration of the illumination device.
FIGS. 9 to 11 are graphs showing a change in luminous flux, a change in light efficiency, and a change in color temperature, respectively, when the light extracting panel having the light extracting pattern is provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

It will be appreciated that when an element such as a layer, region or substrate is referred to as being present on another element "on," it may be directly on the other element or there may be an intermediate element in between .

Although the terms first, second, etc. may be used to describe various elements, components, regions, layers and / or regions, such elements, components, regions, layers and / And should not be limited by these terms.

1 is a schematic view showing an example of a lighting apparatus using an organic light emitting element.

1, an illuminating device using an organic light emitting device includes a circuit board 110, and a plurality of organic light emitting device panels 110, which are electrically connected to each other on the circuit substrate 110 so as to have the same potential, And a light emitting unit (100) including a light emitting diode (120).

As described above, the organic light emitting diode panels 120 may be equally spaced from each other and may be appropriately arranged for optimal light emission.

The organic light emitting device can emit uniform light in the whole luminescent area because it is capable of emitting light on a plane surface, so that it has excellent light texture and is suitable for emotional illumination.

In order to emit the uniform light, the organic light emitting device panels 120 are connected to each other on the circuit board 110 at equal potentials. For this purpose, the organic light emitting device panels 120 are connected to the (+ (-) electrodes are connected to each other and are mounted on the circuit board 110.

At this time, the connection of the electrode pads of each organic light emitting diode panel 120 and the circuit board 110 can be conducted by applying a conductive adhesive agent (Ag paste, conductive ball, etc.) along the circuit line on the circuit board 110 .

As shown in FIG. 2, the circuit board 110 may include a driving circuit unit 200 for driving the organic light emitting diode panel 120. The driving circuit unit 200 may drive the organic light emitting diode panel 120 arranged on the circuit board 110.

In addition, the driver IC 230 (see FIG. 7) among the driving circuit units 200 may be provided on each circuit board 110.

The circuit board 110 and the organic light emitting diode panel 120 arranged on the circuit board 110 may be configured in a modular fashion. That is, the circuit board 110 and the organic light emitting diode panel 120 arranged on the circuit board 110 can be handled as a single unit. This will be described in detail later.

3 is a side view showing an example of a lighting apparatus using an organic light emitting element.

As shown in the drawing, the light emitting unit 100 includes the organic light emitting device panel 120 and the organic light emitting device panel 120. The organic light emitting device panel 120 is disposed on the circuit substrate 110 at regular intervals. The extraction panel 130 is located.

That is, one light extracting panel 130 may be placed in contact with a plurality of organic light emitting diode panels 120.

In the case where the light emitting unit 100 is configured as a module, a single light extracting panel 130 covering all of the individual modules may be provided.

However, it is needless to say that individual light extraction panels 130 applied to individual modules may be provided.

The light extraction panel 130 may include a light extracting pattern to maximize extraction of light emitted from the OLED panel 120.

The light extracting pattern may be formed directly on the light extracting panel 130 or may be attached to the light extracting panel 130. Such a light extraction pattern can improve the light efficiency of the OLED panel 120 by about 30%.

Such a light extraction pattern may be at least one of a micro lens array, a bead, and a matrix pattern. Such a light extraction pattern can make the interval between the patterns or the size of the unit pattern have a size of several tens of micrometers (占 퐉).

That is, PMMA-based beads or oxide-based beads such as TiOx, SiOx, SiONx, and SiNx are irregularly scattered on the matrix of the light extraction panel 130 and fixed with a polymer matrix having a high refractive index to form a light extraction pattern .

4, the light extracting panel 130 may include a bubble region B that does not contact the organic light emitting diode panel 120. Referring to FIG.

That is, the organic light emitting device panel 120 is positioned between the circuit substrate 110 and the light extracting panel 130 so as to have a constant width A at regular intervals, And region (B).

In this bubble region B, a painted layer 140 for imparting hue or a mask layer 140 for masking light may be provided.

The light extraction panel 130 may be directly mounted on the organic light emitting diode panel 120 with the light extraction pattern.

The adhesive used for attaching the light extracting panel 130 may be a PSS-based transparent resin. At this time, it is possible to laminate and attach an air gap between the upper surface of the organic light emitting diode panel 120 and the light extracting panel 130 so as not to generate an air gap.

The matrix of the light extracting panel 130 may be made of PC resin or acrylic resin having high transmittance, but all films or plates capable of maintaining transparency and shape can be used.

When the integrated light extracting panel 130 is used as a front cover of the illumination device, not only the light efficiency and lifetime of the organic light emitting device light source can be improved, but even when the light emitting device is broken due to an external impact, The piece is trapped in the light extracting panel 130, which is advantageous for user safety.

5 illustrates an example in which the light emitting unit 100 including the circuit substrate 110 and the plurality of organic light emitting device panels 120 disposed on the circuit substrate 110 is modularized have.

In other words, three light emitting module modules 100a, 100b, and 100c including a circuit board 110 on which the organic light emitting device panels 120 are arranged are provided.

The organic light emitting device panel 120 includes four organic light emitting device panels 120 arranged in a line on a circuit board 110 forming each light emitting module, And the second line 112 connecting the line 111 and the negative electrode to each other.

At this time, the first line 111 and the second line 112 are electrically connected to the connector 113 located on the end side of the circuit board 110. Each circuit board 110 can be connected to the driving circuit unit 200 by the connector 113.

In addition, as described above, the driving circuit unit 200 may be provided in each of the light emitting module modules 100a, 100b, and 100c (see FIG. 2).

Meanwhile, driver ICs 230 (see FIG. 7) among the driving circuit units 200 may be provided on each circuit board 110.

The three light emitting module modules 100a, 100b, and 100c may be arranged on the lower cover 300.

6, a light emitting diode 150 may be used together with the organic light emitting diode panel 120 on the circuit board 110 of each light emitting module.

That is, a plurality of light emitting diodes 150 may be arranged in a manner to surround the respective sides of the OLED panel 120. At this time, the light emitting diode 150 may be connected to the driving circuit unit 200 (see FIG. 2) together with the organic light emitting diode panel 120 and driven.

Fig. 7 shows the structure of the driving circuit unit 200 for driving the lighting apparatus.

The driving circuit unit 200 includes a power supply unit (SMPS) 210 for converting an AC power source to a DC power source, a DC / DC converter 220 for controlling the voltage of the power source, And a driving IC (Driver IC) 230 for supplying a constant current to the unit 100.

In addition, the power supply unit 210 may include a PFC circuit for correcting the power factor.

Fig. 8 shows an example of the system configuration of the illumination device.

As shown in the figure, two light emitting modules 100a and 100b are provided, and the modules 100a and 100b are connected to each other by a connector cable 114 coupled to the connector 113.

In each module, a first line 111 connecting the (+) electrodes of the organic light emitting diode panel 120 is located along one side of the circuit board 110, and a second line A line 112 is located along the other side of the circuit board 110 and connected to the connector 113.

And the light emitting module 100b located on the lower side is connected to the driving circuit unit 200 through the connector 113. [

The power supply unit 210 included in the driving circuit unit 200 and driving the light emitting units 100a and 100b includes independent power supply units (SMPS) 211 and 212 for driving the light emitting module modules 100a and 100b can do.

The power supply unit 210 provides power for driving the light emitting module 100a or 100b using an AC power source.

At this time, the power input through the power supply unit 210 is connected to the connector 113 by adjusting the voltage, power, etc. through the DC / DC converter 220.

Here, the driver IC is omitted. As described above, the driver IC may be provided in each of the modules 100a and 100b and may be provided in the driving circuit unit 200. [

The characteristics of the solid state lighting including the light emitting diode light source and the organic light emitting device light source described above are advantageous in that the device design and design can be freely compared with the conventional illumination.

It is important to secure durability so that there is no problem in reliability when the respective organic light emitting device panels 120 are connected to the driving circuit unit 200 when constructing the lighting device system using the plurality of organic light emitting device panels 120 Lt; / RTI >

At this time, a plurality of organic light emitting diode panels 120 connected by an equal potential may be arranged and soldered on the circuit board 110.

As described above, when the light emitting unit 100 including the organic light emitting device panel 120 is modularized, it is possible to easily replace the organic light emitting device panel 120 when a problem occurs in the organic light emitting device panel 120, Is possible.

Such a module may include all the light sources of the illumination device using the organic light emitting device panel 120, and may include a plurality of basic modules including a plurality of unit modules including only a few light sources, .

On the other hand, the driving circuit unit 200 described above can be designed so that the entire circuit can be separately designed in a narrow space formed by the lighting device, and their electrical characteristics can be maintained.

Particularly, the PFC circuit of the power supply unit 210 and the DC / DC converter 220, which may generate a large amount of heat, may be disposed on the driver IC 230 to prevent a decrease in electrical characteristics due to heat generation.

In addition, the first line 111 and the second line 1120 can mechanically separate the high-voltage-flowing wire and the low-voltage-wire, so that the first and second lines 111 and 1120 can be electrically isolated and stable.

The 220 V input power belonging to the high voltage wiring passes through the power supply unit 210 and the DC / DC converter 220, and is transmitted to the driver IC 230 as a low-voltage DC power. In this process, high-voltage AC wiring and low-voltage DC wiring are mechanically separated, so they are not electrically affected.

The driver IC 230, which receives the low-voltage DC power, drives the OLED panel 120.

In addition, as additional functions, components of sensors that can perform wireless communication components such as Zigbee, bluetooth, voice recognition, motion recognition, and the like can be formed on a circuit board 110 including a light source, and can be manufactured as an integrated module.

As described above, the illumination device may be used as a light source in addition to the OLED panel 120, as well as a light source.

In particular, when a high-output light emitting diode 150 light source is used, a carbon material such as graphite, carbon nanotube (CNT), and graphene may be separately formed on the opposite side of the circuit board 110, It is possible to easily radiate heat generated during operation of the light emitting diode 150 to the outside by attaching a heat radiating plate to which a heat radiating material of excellent metal is applied.

9 to 11 show changes in luminous flux, light efficiency, and color temperature when the light extracting panel 130 having the light extracting pattern is provided.

In each graph, ① indicates no light extraction pattern, ② indicates light extraction pattern, and ③ indicates diffuser plate only.

As shown in the figure, when the light extracting panel 130 having the light extracting pattern is applied, the luminous flux and the light efficiency exhibit an improvement equal to or higher than that of the light extracting panel 130, and the color temperature shift is rather small.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: light emitting portion 110: circuit board
120: organic light emitting device panel 130: light extracting panel
200: driving circuit part 210:
220: DC / DC converter 230: Driver IC

Claims (10)

A circuit board;
A plurality of organic light emitting diode panels electrically connected to each other on the circuit board so as to have the same potential; And
And a light extracting panel located on the plurality of organic light emitting device panels and including a light extracting pattern. The lighting apparatus as claimed in claim 1, wherein the circuit substrate and the plurality of organic light emitting device panels disposed on the circuit substrate are modularized. The lighting device as claimed in claim 2, wherein the modular circuit boards are connected to each other by a connector. [3] The illuminating device of claim 2, wherein the modular circuit board is provided with a driving circuit for driving the OLED panel. The illumination device as claimed in claim 1, wherein the light extracting panel is integrated to cover the plurality of organic light emitting device panels. The illumination device as claimed in claim 1, wherein the light extracting panel is in contact with the organic light emitting device panel. The illumination device of claim 6, wherein the light extraction panel includes a bubble region that is not in contact with the organic light emitting device panel. The illumination device as claimed in claim 7, wherein a color layer or a mask layer for masking light is provided in the bubble region. The illumination device as claimed in claim 1, wherein the light extraction pattern is at least one of a microlens array, a bead, and a matrix pattern. The lighting apparatus of claim 1, wherein a light emitting diode is further provided on one side of the circuit board on which the OLED panel is located.

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