KR20140054548A - Oled lingting for improvement of brightness uniformity - Google Patents

Abstract

The present invention relates to an OLED lamp for improving the uniformity of brightness and, more particularly, to an OLED lamp for improving the uniformity of brightness, capable of variously designing the OLED lamp and increasing the area of the OLED lamp which is a surface light source by minimizing brightness deviation generated in a light emitting region.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an OLED illumination for improving luminance uniformity,

The present invention relates to an OLED illumination for improving brightness uniformity, and more particularly, to an OLED lighting device capable of minimizing a luminance deviation generated in a light emitting region and improving luminance uniformity that enables various designs and large- Which is related to the LED illumination.

In general, organic light-emitting diodes (OLEDs) are self-luminous, free-viewing, energy-saving devices that offer advantages including low production costs, manufacturability, low operating temperature, fast response and full color Which is mainly used as a flat panel display.

In addition, OLEDs can also be used as an illumination. Conventional lighting equipment including fluorescent lamps and incandescent lamps have low luminous efficiency and cause environmental pollution. On the other hand, OLED lighting is environmentally friendly, Can be manufactured in a form of a high and various surface light source and can be applied to a transparent light or a flexible light.

1 is a view for explaining conventional OLED illumination.

1, a conventional OLED illumination 10 includes a positive electrode 12, an organic luminous material 13, an insulator 14, and a negative electrode 15 stacked on a substrate 11 having a predetermined width, The organic electroluminescent material 13 emits light when a voltage is applied to the positive electrode 12 and the negative electrode 15.

Here, the specific surface of the LED light 10 can be divided into a light emitting region and a non-light emitting region which are predetermined regions emitting light by energization between the negative electrode 15 and the positive electrode 12, and in the case of the non- The light emitting region may be a predetermined region where the insulator 14 is formed and the light emitting region may be a predetermined region in which the organic luminescent material 13 or the positive electrode 12 is formed.

In addition, the LED light 10 may function as a lighting device capable of emitting light on a predetermined surface, and may be manufactured in various shapes such as a triangular shape and a circular shape in addition to a square shape.

Meanwhile, in the conventional OLED lighting 10, the brightness is high in a predetermined injection portion into which the current is injected into the organic luminous material 13, but the brightness is relatively decreased as the distance from the injection portion is increased. There is a problem in that a luminance deviation occurs within the display area.

That is, as the area of the light emitting area of the conventional OLED illumination 10 is widened, the luminance deviation largely occurs. This causes a problem of reducing the efficiency and lifetime of the illumination, increasing the size of the OLED illumination, Which makes the application difficult.

It is an object of the present invention to provide an OLED lighting device capable of variously designing and realizing large-area OLED illumination by minimizing a variation in brightness in an emission region of OLED illumination, and improving uniformity of brightness, .

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an LED illumination device comprising: a substrate; An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light; A negative electrode for injecting electrons from an upper portion of the organic luminous material; And a positive electrode provided at a lower portion of the organic luminous material for injecting holes, wherein the positive electrode is divided into a plurality of divided portions, thereby providing an LED illumination for improving brightness uniformity.

Further, the present invention provides an OLED illumination device comprising: a substrate; An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light; A negative electrode for injecting electrons from an upper portion of the organic luminous material; A positive electrode disposed below the organic luminous material and injecting holes; And a plurality of auxiliary electrodes electrically connected to the positive electrode, the auxiliary electrodes being arranged at predetermined intervals in at least one of a horizontal direction and a vertical direction, and for improving brightness uniformity.

Further, the present invention provides an OLED illumination device comprising: a substrate; An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light; A negative electrode for injecting electrons from an upper portion of the organic luminous material; And a positive electrode provided at a lower portion of the organic luminous material for injecting holes, wherein a plurality of the luminous regions are formed at predetermined positions on the substrate. do.

In a preferred embodiment, the plurality of auxiliary electrodes are electrically connected to the upper electrode or the lower electrode of the positive electrode and arranged at predetermined intervals in at least one of a horizontal direction and a vertical direction.

In a preferred embodiment, the plurality of luminescent regions are formed so as to lie in at least a part of the lattice formed by the arrangement of the plurality of auxiliary electrodes.

In a preferred embodiment, the plurality of light emitting regions are formed to have the same size.

In a preferred embodiment, the plurality of auxiliary electrodes are arranged in the lateral direction and the longitudinal direction with the same interval between each auxiliary electrode and each light emitting region.

In a preferred embodiment, the plurality of light emitting regions are formed in a plurality of sizes.

In a preferred embodiment, the plurality of light emitting regions are formed to be smaller in size from a central portion of the substrate to a rim portion.

In a preferred embodiment, the plurality of auxiliary electrodes are arranged at equal intervals in the lateral direction and the longitudinal direction.

In a preferred embodiment, the plurality of auxiliary electrodes are arranged at intervals corresponding to the sizes of the plurality of light emitting regions, and the intervals between the auxiliary electrodes and the respective light emitting regions are formed to be the same.

In a preferred embodiment, the plurality of light emitting regions are arranged at different ratios in the central portion and the rim portion of the substrate.

In a preferred embodiment, the plurality of light emitting regions are polygonal, circular or elliptical.

The present invention has the following excellent effects.

According to the OLED illumination for improving luminance uniformity according to an embodiment of the present invention, a positive electrode is divided or formed, and the size and arrangement of the auxiliary electrode or the contact hole are adjusted by using any one of the auxiliary electrode and the contact hole As the resistance increase and the voltage drop of the anode electrode are minimized, the luminance deviation between the center portion and the edge portion of the O-light illumination, which is a surface light source, is minimized, and uniform light is emitted.

1 is a view for explaining conventional OLED lighting;
2 is a view for explaining an LED light according to a first embodiment of the present invention;
3 is a view for explaining an LED light according to a second embodiment of the present invention;
4 is a view for explaining an LED light according to a third embodiment of the present invention;
5 is a view for explaining an LED light according to a fourth embodiment of the present invention;
6A to 6B are diagrams for explaining an LED light according to a fifth embodiment of the present invention;
7 is a view for explaining an LED light according to a sixth embodiment of the present invention;
8 is a view for explaining an LED light according to a seventh embodiment of the present invention;
9 is a view for explaining an LED light according to an eighth embodiment of the present invention;
10 is a graph showing a luminance deviation of an LED illumination according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

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

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

The OLED illumination for improving brightness uniformity according to an embodiment of the present invention is provided to emit light using an OLED element as a surface light source that emits light in a light emitting area of a predetermined width, , A positive electrode, a negative electrode, and an insulator.

Here, the organic luminescent material may have a predetermined width on the substrate, and may form a predetermined region substantially corresponding to the light emitting region. In addition, the organic luminescent material may be formed to inject electrons and holes from a negative electrode and a positive electrode to be described later to generate light.

The positive electrode is for injecting holes into the organic luminescent material. The positive electrode may be provided on the substrate, and may be located below the organic luminescent material. The positive electrode may have a predetermined width to allow the organic luminescent material to be located. The positive electrode may be a transparent electrode that is transparent to visible light and has electrical conductivity. The positive electrode may be formed to extend to the outside of the substrate through an edge portion or a predetermined region of the substrate, .

The negative electrode is for injecting electrons into the organic luminescent material, and may be formed on at least one of an upper portion of the organic luminescent material and a rim portion of the substrate, and may be formed of a conductive material. The negative electrode may be divided into a plurality of negative electrodes.

The insulator is formed between the positive electrode and the negative electrode. The insulator may be formed of a variety of materials capable of electrical insulation. The insulator may prevent the current between the positive electrode and the negative electrode, . In addition, when the organic luminescent material is divided into a plurality of organic luminescent materials, the insulator may be provided between the plurality of organic luminescent materials to form a non-luminescent region that is a predetermined region that does not emit light.

In addition, the OLED illumination for improving luminance uniformity according to an embodiment of the present invention can be applied to substantially transparent illumination and opaque illumination, and when the anode is formed as a transparent electrode, The substrate may be made of a flexible material, and may be applied as a flexible illumination.

2 is a view for explaining an LED illumination according to a first embodiment of the present invention.

Referring to FIG. 2, the O LED illumination 100 according to the first embodiment of the present invention is for minimizing a luminance deviation in a light emitting region, which is a predetermined surface on which light is emitted, The positive electrode 130 is divided into at least two portions.

The OLED illumination 100 according to the first embodiment of the present invention includes a substrate 110, an organic luminous material layer 110 formed at a central portion of the substrate 110 to form a light emitting region, A positive electrode 130 formed at a lower surface of the organic luminescent material 120 to inject holes into the organic luminescent material 120 and a cathode 130 formed on a rim of the upper surface of the substrate 110, And a plurality of cathode electrodes 140 for injecting electrons into the organic luminous material. Meanwhile, the cathode electrode 140 may not be formed only on the edge of the substrate 110, but may be formed as one layer on the organic light emitting material.

Here, the positive electrode 130 may be a transparent electrode, or may include indium tin oxide (ITO), zinc oxide (ZnO), or indium zinc oxide (IZO).

In the first embodiment of the present invention, the positive electrode 130 is divided into a plurality of four, but the positive electrode 130 may be divided into four or more, And can be adjusted to a specific number depending on the size.

Further, as the positive electrode 130 is dividedly formed, the area of each of the divided positive electrodes 130 is reduced, thereby reducing the resistance increase and the voltage drop. Therefore, the voltage drop in the positive electrode 130 is reduced, and the luminance variation in the light emitting region is also reduced.

3 is a view for explaining an LED illumination according to a second embodiment of the present invention.

Referring to FIG. 3, the O LED illumination 200 according to the second embodiment of the present invention is for reducing a brightness deviation in a light emission area, which is a surface on which light is emitted, and includes an auxiliary Electrode 250 is provided.

The OLED illumination 200 according to the second embodiment of the present invention includes a substrate 210, an organic luminescent material 220 formed at a predetermined width at a central portion of the substrate 210 to form the luminescent region, A positive electrode 230 formed at a lower surface of the organic luminous material 220 to inject holes and at least one of a rim of the substrate 210 and an upper portion of the organic luminous material 220 And a plurality of negative electrodes 240 for injecting electrons into the organic light emitting material 220.

The auxiliary electrode 250 may be disposed on the upper surface or the lower surface of the positive electrode 230 and may be arranged at a predetermined interval in at least one of a horizontal direction and a vertical direction. The auxiliary electrode 250 is electrically connected to the positive electrode 230 to reduce the resistance of the positive electrode 230. The auxiliary electrode 250 may be made of a metal having a low resistance, for example, Cr, molybdenum (Mo) or ITO.

In addition, the auxiliary electrode 250 may be provided in a plurality of lines extending in the transverse direction, a plurality of lines extending in the longitudinal direction, or a lattice pattern. In the second embodiment of the present invention, 250 are arranged in the lateral direction and the longitudinal direction to be connected to the positive electrode 230 while forming a lattice pattern.

Here, the auxiliary electrode 250 may be formed in various shapes according to the size of the illumination and the use of the auxiliary electrode 250, and the width and shape of the auxiliary electrode 250 may be adjusted. For example, The width of the auxiliary electrode 250 may be minimized to prevent the auxiliary electrode 250 from being visually recognized. When the auxiliary electrode 250 is manufactured with opaque light, the width of the auxiliary electrode 250 may be increased.

That is, as the auxiliary electrode 250 prevents the decrease in resistance in the positive electrode 230 and efficiently flows the current, the voltage drop in the positive electrode 230 is reduced and the luminance deviation in the predetermined light emitting region is minimized .

4 is a view for explaining an LED illumination according to a third embodiment of the present invention.

Referring to FIG. 4, the OLED illumination 300 according to the third embodiment of the present invention includes a plurality of light emitting regions divided in order to minimize a luminance deviation, The organic luminescent material 320 forming the region is divided into a plurality of portions and disposed at predetermined positions.

The OLED illumination 300 according to the third embodiment of the present invention includes a substrate 310 and an organic luminescent material 320 provided on the substrate 310 and divided into a plurality of luminescent regions, A positive electrode 330 electrically connected to the lower surface of the plurality of organic light emitting materials and injecting holes therein, at least one of an edge of the substrate 310 and an upper portion of the organic light emitting materials 320, And a plurality of cathode electrodes 340 for injecting electrons.

At this time, the light emitting regions generated by the organic light emitting materials 320 may be formed to have a variety of shapes and sizes depending on the shape and size of the organic light emitting material 320, The organic electroluminescent material 320 is disposed on the same layer as the organic electroluminescent material 320 between the positive electrode 330 and the negative electrode 340 so that the organic electroluminescent material 320 is insulated by an insulator And may be provided between the organic luminescent materials 320.

In addition, the plurality of light emitting regions may have the same size and shape, and the substantial shape may be polygonal, circular, or elliptical.

That is, since the organic luminescent material 320 is not divided into a single plate but divided into a plurality of organic luminescent materials 320, the luminance of each luminescent region formed by each organic luminescent material 320 may be uniform Since a current can be injected from the positive electrode 330 only at a predetermined position where the organic luminous material 320 is formed, the voltage drop in the positive electrode 330 can be minimized and the brightness deviation can be reduced .

5 is a view for explaining an LED illumination according to a fourth embodiment of the present invention.

5, the LED lighting device 400 according to the fourth embodiment of the present invention includes a light emitting region divided into a plurality of light emitting regions and an auxiliary electrode 450 electrically connected to the anode electrode 430 ).

The OLED illumination 400 according to the fourth embodiment of the present invention includes a substrate 410 and an organic luminescent material 420 provided on the substrate 410 and divided into a plurality of luminescent regions, A positive electrode 430 electrically connected to a lower surface of the plurality of organic light emitting materials and injecting holes, at least one of an edge of the substrate 410 and an upper portion of the organic light emitting materials 420, A plurality of negative electrodes 440 for injecting electrons and a plurality of auxiliary electrodes 450 electrically connected to the positive electrodes 430.

Here, the light emitting region is a predetermined region in which the organic light emitting material 320 is formed, and is a predetermined region where light is emitted by the organic light emitting material 320. In addition, the plurality of light emitting regions may be provided in various shapes including a polygonal shape, a circular shape, and an elliptical shape.

The auxiliary electrode 450 is disposed on the upper surface or the lower surface of the positive electrode 430 and is electrically connected to the positive electrode 430 to reduce the resistance. , Molybdenum (Mo), or ITO.

The plurality of auxiliary electrodes 450 may be arranged in at least one of a horizontal direction and a vertical direction. In this case, the plurality of auxiliary electrodes 450 may be arranged in at least a part of the grid, Emitting region is located. Here, the plurality of light emitting regions may have the same size and shape.

An insulator (not shown) may be provided between the organic luminous material 420 to prevent electrical connection. The insulator may be disposed between the positive electrode 430 and the negative electrode 440, And may be provided between the organic luminescent materials 420 while being positioned in the same layer as the material 420. [

In the O LED illumination 400 according to the fourth embodiment of the present invention, a plurality of auxiliary electrodes 450 are arranged in the lateral direction and the longitudinal direction, and the intervals between the auxiliary electrodes 450 and the respective light- Spacing.

That is, a structure in which the organic luminous material 420 is divided into a plurality of parts and the plurality of auxiliary electrodes 450 is formed to reduce the resistance of the positive electrode 430 and effectively prevent the voltage drop, The deviation is minimized.

6A and 6B are diagrams for explaining an LED illumination according to a fifth embodiment of the present invention.

6A and 6B, the O LED lighting 500 according to the fifth embodiment of the present invention includes a plurality of auxiliary electrodes 550 and a plurality of light emitting regions The size of the light emitting region is formed in a plurality of sizes according to a predetermined position.

The OLED illumination 500 according to the fifth embodiment of the present invention includes a substrate 510 and an organic luminescent material 520 disposed on the substrate 510 and divided into a plurality of luminescent regions, A positive electrode 530 electrically connected to a lower surface of the plurality of organic light emitting materials and injecting holes, at least one of an edge of the substrate 510 and an upper portion of the organic light emitting materials 520, A plurality of negative electrodes 540 for injecting electrons and a plurality of auxiliary electrodes 550 electrically connected to the positive electrodes 530.

The insulator 560 may be provided between the positive electrode 530 and the negative electrode 540 to prevent electrical connection between the positive electrode 530 and the negative electrode 540. [ And may be provided between the respective organic luminescent materials 520 while being positioned in the same layer as the organic luminescent material 520. In addition, the predetermined region where the insulator 560 is formed is formed as a non-emission region which is a region that does not emit light.

The organic electroluminescent material 520 located at the edge of the substrate 510 is smoothly injected with current but the organic electroluminescent material 520 located at the center of the substrate 510 is relatively current The light emitting regions located at the center of the substrate 510 are relatively dark compared to the light emitting region located at the edge of the substrate 510. [

Therefore, the LED lighting 500 according to the fifth embodiment of the present invention has the auxiliary electrode 550 and can adjust the size of the plurality of light emitting regions so that the overall brightness of the illumination can be uniform .

In addition, the light emitting region may be formed to have a size larger or smaller depending on a predetermined position. For example, the plurality of light emitting regions may be sequentially increased in size or smaller. In addition, each light emitting region can control the size of each light emitting region by adjusting the size of each organic light emitting material 520. The plurality of light emitting regions may be polygonal, circular or elliptical.

The light emitting region has a larger size as it is located at the central portion of the substrate 510 and has a smaller size as it approaches the rim of the substrate 510. However, the size of the light emitting region may be as small as about 50% as compared with the largest light emitting region.

The O LED illumination 500 according to the fifth embodiment of the present invention further includes a plurality of auxiliary electrodes 550 electrically connected to the both electrodes 530 so as to lower the resistance of the both electrodes 530 And the auxiliary electrodes 550 are arranged to have the same interval in the horizontal and vertical directions.

That is, since the light emitting region has a plurality of sizes, a relatively large amount of light can be emitted in a predetermined dark region, and a relatively small amount of light can be emitted in a predetermined bright region, Can be minimized.

7 is a view for explaining an LED illumination according to a sixth embodiment of the present invention.

Referring to FIG. 7, an O LED illumination 600 according to a sixth embodiment of the present invention includes a plurality of auxiliary electrodes 650 and a plurality of light emitting regions for minimizing a luminance variation, Area is formed in a plurality of sizes.

The OLED illumination 600 according to the sixth embodiment of the present invention includes a substrate 610 and an organic luminescent material 620 provided on the substrate 610 and divided into a plurality of luminescent regions, A positive electrode 630 which is electrically connected to the lower surface of the plurality of organic luminous materials 620 and injects holes thereon, a cathode 630 formed on at least one of the rim of the substrate 610 and the top of the organic luminous material 620 A plurality of negative electrodes 640 for injecting electrons and a plurality of auxiliary electrodes 650 electrically connected to the positive electrodes 630.

In addition, an insulator (not shown) may be provided between the organic luminous material 620 to prevent electrical connection, and the insulator may be formed between the positive electrode 630 and the negative electrode 640, And may be provided between the organic light emitting materials 620 while being positioned in the same layer as the material 620.

At this time, the plurality of light emitting regions formed by the plurality of organic light emitting materials 620 are larger in size at the center of the substrate 610, and gradually become smaller toward the edge of the substrate 610. However, the intervals between the light emitting regions are formed to have the same interval.

In addition, the size of the light emitting region may be smaller than the largest light emitting region by about 50%, and the shape of the light emitting region may be polygonal, circular, or elliptical.

The plurality of auxiliary electrodes 650 function to lower the resistance of the anode 620 and are arranged in the horizontal and vertical directions to form a lattice pattern. The plurality of auxiliary electrodes 650 are arranged at intervals corresponding to the size of the light emitting region The spacing between the auxiliary electrodes 650 is not constant and the spacing between the auxiliary electrodes 650 gradually narrows from the central portion of the substrate 610 to the edge portion. Further, the intervals between the respective light emitting regions and the auxiliary electrodes 650 are formed to have the same interval.

That is, by adjusting the size of the light emitting region, a relatively large amount of light can be emitted in a predetermined dark region, and a relatively small amount of light can be emitted in a predetermined bright region. Can be minimized.

8 is a view for explaining an LED illumination according to a seventh embodiment of the present invention.

Referring to FIG. 8, an OLED illumination 700 according to a seventh embodiment of the present invention includes a plurality of auxiliary electrodes and a plurality of emission regions in order to minimize a luminance variation, Of the total number.

The OLED illumination 700 according to the seventh embodiment of the present invention includes a substrate 710 and an organic luminescent material 720 provided on the substrate 710 and divided into a plurality of luminescent regions, A positive electrode 730 electrically connected to the lower surface of the plurality of organic light emitting materials 720 and injecting holes, at least one of an edge of the substrate 710 and an upper portion of the organic light emitting materials 720 A plurality of negative electrodes 740 for injecting electrons and a plurality of auxiliary electrodes 750 electrically connected to the positive electrodes 730.

In addition, the plurality of auxiliary electrodes 750 may be arranged at equal intervals in the lateral direction and the longitudinal direction to lower the resistance of the positive electrode 730, Emitting region is located within the light-emitting region.

In addition, an insulator (not shown) may be provided between the organic luminescent materials 720 to prevent electrical connection, and the insulator may be interposed between the positive electrode 730 and the negative electrode 740, And may be provided between the organic light emitting materials 720 while being positioned in the same layer as the material 720.

In addition, the plurality of light emitting regions are arranged at different ratios in the central portion of the substrate 710 and at the rim portion of the substrate 710, thereby making the luminance of the entire region of the illumination uniform. In addition, the plurality of light emitting regions may be polygonal, circular, or elliptical, and the light emitting region having a size smaller than that of the large light emitting region may have a size of about 50%.

That is, a large number of light emitting regions having a large size are arranged in the central portion of relatively darker brightness in the illumination, and a large number of light emitting regions having a small size are arranged in the relatively bright portion. Accordingly, it is possible to prevent the concentration of the luminance in a specific region of the illumination, thereby minimizing the luminance deviation of the light emitting region.

9 is a view for explaining an LED illumination according to an eighth embodiment of the present invention

Referring to FIG. 9, an OLED illumination 800 according to an eighth embodiment of the present invention includes a plurality of light emitting regions and a plurality of non-emitting regions to minimize a luminance deviation.

An OLED illumination 800 according to an eighth embodiment of the present invention includes a substrate 810 and an organic luminescent material 820 disposed on the substrate 810 and divided into a plurality of luminescent regions, A positive electrode 830 electrically connected to a lower surface of the plurality of organic light emitting materials 820 to inject holes, at least one of an edge of the substrate 810 and an upper portion of the organic light emitting materials 820 And a plurality of auxiliary electrodes 850 electrically connected to the positive electrode 830 and a non-emission region 860, which is a predetermined region that does not emit light. have.

The plurality of auxiliary electrodes 850 may be arranged in a horizontal direction and a vertical direction to form a lattice pattern and may be formed by arranging the plurality of auxiliary electrodes 850, And each luminescent region is located in the lattice.

In addition, an insulator (not shown) may be provided between the organic luminous material 820 to prevent electrical connection, and the insulator may be formed between the positive electrode 830 and the negative electrode 840, And may be provided between the organic light emitting materials 820 while being positioned in the same layer as the material 820. [

In addition, the non-emission region 860 is provided in the lattice pattern formed by the plurality of auxiliary electrodes 850 in addition to the emission region to uniformly control the overall brightness of the illumination.

In addition, the non-emission region 860 is a predetermined region in which the organic emission material 820 is not located in the lattice pattern formed by the auxiliary electrode 850 but only the insulator is located, Regions are formed as a plurality of non-emission regions 860. [

In addition, the non-emission region 860 is formed in a relatively large number in the edge portion of the substrate 810, and the number of the non-emission regions 860 is relatively small toward the center of the substrate 810. Of course, the number of the non-emission regions 860 may be adjusted in consideration of conditions such as luminance variation and size of illumination.

It is preferable that the non-emission region 860 is formed to be 80% or less in order to prevent the overall luminance of the illumination from being lowered. Further, each of the non-emission regions may be arranged sequentially or irregularly.

That is, the OLED illumination 800 according to the eighth embodiment of the present invention simultaneously arranges a plurality of emission regions and a plurality of non-emission regions 860, thereby minimizing the overall luminance deviation of the illumination.

FIG. 10 is a graph illustrating luminance deviations of the O LED illumination according to an embodiment of the present invention.

Referring to FIG. 10, a square white OLED having a size of 90 mm and a length of 150 mm is used as an OLED illumination according to an embodiment of the present invention and a comparative OLED illumination (Reference), and the luminance deviation was measured.

Also, the luminance deviation measurement method calculates the luminance deviation by scanning the luminance from one corner to the other corner located in the diagonal direction. For example, when the diagonal line from the upper left corner to the lower right corner of the square- The luminance was measured on the distance. Also, at the time of luminance scanning, ProMetric of Radiant Imaging was used as a surface light source measuring device.

In FIG. 10, the x axis represents the diagonal distance and the y axis represents the luminance. In the case of the x axis, the value of 0 is a predetermined position of the upper left corner, and the value of 0.1800 is a predetermined position of the lower right corner.

In addition, in the case of the embodiment (Reformation), although the variation of the luminance slightly occurs, it can be seen that the variation width is not large and the uniformity of the luminance is calculated to have a uniformity level of 90% .

On the other hand, in the case of the reference, the brightness decreases as the distance from 0 to the x-axis decreases, and the brightness increases as the distance to 0.1800 decreases. Therefore, the brightness of the upper left corner and the lower right corner of the illumination is high, It can be confirmed that the brightness of the central portion is decreased sharply.

Also, in the case of the reference, it can be confirmed that the uniformity of the overall luminance is calculated to have a low uniformity of about 60%.

Therefore, when compared to conventional O LED illumination, the O LED illumination according to the embodiment of the present invention has a low luminance deviation in the whole area and excellent uniformity of brightness.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

110, 210, 310, 410, 510, 610, 710, 810:
120, 220, 320, 420, 520, 620, 720, 820:
130, 230, 330, 430, 530, 630, 730, 830:
140, 240, 340, 440, 540, 640, 740, 840: Negative electrode
250, 450, 550, 650, 750, 850: auxiliary electrode

Claims (13)

In OLED lighting,
Board;
An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light;
A negative electrode for injecting electrons from an upper portion of the organic luminous material; And
And a positive electrode provided below the organic luminous material for injecting holes,
And the positive electrode is divided into a plurality of portions.
In OLED lighting,
Board;
An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light;
A negative electrode for injecting electrons from an upper portion of the organic luminous material;
A positive electrode disposed below the organic luminous material and injecting holes; And
And a plurality of auxiliary electrodes electrically connected to the positive electrodes and arranged at predetermined intervals in at least one of a horizontal direction and a vertical direction.
In OLED lighting,
Board;
An organic luminescent material provided on the substrate to form a light emitting region which is a predetermined region emitting light;
A negative electrode for injecting electrons from an upper portion of the organic luminous material;
And a positive electrode provided below the organic luminous material for injecting holes,
Wherein the light emitting region is formed in a plurality of predetermined positions on the substrate.
The method of claim 3,
And a plurality of auxiliary electrodes electrically connected to the upper electrode or the lower electrode of the positive electrode and arranged at predetermined intervals in at least one of a horizontal direction and a vertical direction.
5. The method of claim 4,
Wherein the plurality of light emitting regions are formed so as to be located in at least a part of the grating formed by the arrangement of the plurality of auxiliary electrodes.
6. The method according to any one of claims 3 to 5,
And the plurality of light emitting regions are formed to have the same size.
The method according to claim 6,
Wherein the plurality of auxiliary electrodes are arranged in the horizontal direction and the vertical direction in the same interval between the respective auxiliary electrodes and the respective light emitting regions.
6. The method according to any one of claims 3 to 5,
Wherein the plurality of light emitting regions are formed in a plurality of sizes.
9. The method of claim 8,
Wherein the plurality of light emitting regions are formed to be smaller in size from a central portion to a rim portion of the substrate.
10. The method of claim 9,
And the plurality of auxiliary electrodes are arranged at equal intervals in the lateral direction and the longitudinal direction.
10. The method of claim 9,
Wherein the plurality of auxiliary electrodes are arranged at intervals corresponding to the sizes of the plurality of light emitting regions, and the spacing between each auxiliary electrode and each of the light emitting regions is the same. .
10. The method of claim 9,
Wherein the plurality of light emitting regions are arranged at different ratios in a central portion and a rim portion of the substrate in different ratios.
6. The method according to any one of claims 3 to 5,
Wherein the plurality of light emitting regions are formed in a polygonal, circular, or elliptical shape.

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