KR102086473B1 - Organic light emitting diode display device - Google Patents

Abstract

The present invention discloses an organic light emitting display device. An organic light emitting display device according to the present invention includes: a substrate having a plurality of unit pixels including a red subpixel, a green subpixel, a blue subpixel, and an auxiliary subpixel; A first electrode formed on the substrate and including an electrode portion and a reflecting portion; An organic light emitting layer formed on the first electrode; A second electrode formed on the organic light emitting layer; And a color filter formed on the second electrode to correspond to the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel, respectively, wherein the auxiliary subpixel includes a light in which red light and blue light are mixed. It is characterized by emitting.
Accordingly, the organic light emitting display device according to the present invention can realize white color by combining the auxiliary subpixel and the green subpixel by adding the auxiliary subpixel, which is larger than when the red subpixel and the blue subpixel are combined. Can have efficiency. In addition, the organic light emitting display device according to the present invention can reduce power consumption and improve lifespan.

Description

Organic light emitting diode display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display device, and more particularly, to an organic light emitting display device including an auxiliary subpixel to reduce power consumption and improve a lifetime.

Recently, the display field for visually expressing electrical information signals has been rapidly developed in accordance with the full-scale information age. Flat Display Device has been developed to quickly replace the existing Cathode Ray Tube (CRT).

Specific examples of such a flat panel display include a liquid crystal display (LCD), an organic light emitting display (OLED), an electrophoretic display (EPD, Electric Paper Display), Plasma Display Panel Device (PDP), Field Emission Display Device (FED), Electroluminescence Display Device (ELD) and Electro-Wetting Display (EWD) Etc. can be mentioned. These are commonly required components of a flat panel display panel that implements an image. The flat panel includes a pair of substrates bonded to each other with a layer of a light emitting material or a polarizer interposed therebetween.

One of such flat panel display devices is an organic light emitting diode display device, which is a self-light emitting device, and may be light and thin because it does not need a separate light source used for a liquid crystal display device which is a non-light emitting device. In addition, it has better viewing angle and contrast ratio than liquid crystal display, and is advantageous in terms of power consumption. It has merit.

The organic light emitting display device displays an image in the form of top emission, bottom emission, and double-sided emission according to the structure of the organic light emitting layer. In this case, the organic light emitting display device may be a WRGB four-color subpixel organic light emitting display device and an RGB three-color subpixel organic light emitting display device.

The WRGB four-color subpixel organic electroluminescent display has a white (W) subpixel in which white light emission does not pass through the color filter and a red (R), green (G), and blue (B) subpixel passing through the color filter. It consists of. The WRGB four-color subpixel organic light emitting display device has a high efficiency of the white (W) subpixel but a low efficiency of the red (R), green (G), and blue (B) subpixel.

The RGB tricolor subpixel organic electroluminescent display generally has red (R), green (G), and red (R), green (G), and blue (B) subpixels by depositing one of the organic light emitting layers separately for each subpixel. The optical thickness between the anode and the cathode is different for each blue (B) subpixel. The red (R), green (G), and blue (B) subpixels form a reflector in the substrate including the electrode or the transistor of the device to realize a color image by the micro-cavity effect, white is red The image is embodied by mixing the region emitting green and blue at the same time and the region emitting green.

The RGB tricolor subpixel organic light emitting display device adjusts the microcavity to the optical thickness of each of the red (R), green (G), and blue (B) subpixels. The efficiency of the blue (B) subpixel can be improved. However, since the optical thicknesses of the red (R), green (G), and blue (B) subpixels are not simultaneously satisfied in a single pixel, the implementation of white in a single subpixel is impossible. For this reason, if one unit pixel is displayed as three subpixels of red (R), green (G), and blue (B) in the organic light emitting display, light efficiency and power consumption are increased. do.

An object of the present invention is to provide an organic light emitting display device which can realize a white color by adding an auxiliary subpixel and combining the auxiliary subpixel and a green subpixel.

In addition, another object of the present invention is to provide an organic light emitting display device having greater efficiency when combining a red subpixel and a blue subpixel through an auxiliary subpixel.

In addition, another object of the present invention is to provide an organic light emitting display device which includes an auxiliary subpixel, thereby reducing power consumption and improving lifetime.

The organic light emitting display device of the present invention for solving the above problems of the prior art comprises: a substrate having a plurality of unit pixels consisting of a red subpixel, a green subpixel, a blue subpixel, and an auxiliary subpixel; A first electrode formed on the substrate and including an electrode portion and a reflecting portion; An organic light emitting layer formed on the first electrode; A second electrode formed on the organic light emitting layer; And a color filter formed on the second electrode in correspondence with the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel, respectively, wherein the auxiliary subpixel includes a light in which red light and blue light are mixed. It is characterized by emitting.

The organic light emitting display device according to the present invention has a first effect of realizing white color by adding an auxiliary subpixel and a green subpixel by adding an auxiliary subpixel.

In addition, the organic light emitting display device according to the present invention has a second effect having greater efficiency when combining the red subpixel and the blue subpixel through the auxiliary subpixel.

In addition, the organic light emitting display device according to the present invention has a third effect of reducing power consumption and improving lifetime by including an auxiliary subpixel.

1 is a diagram illustrating an organic light emitting display device according to a first embodiment of the present invention.
2 is a diagram illustrating an organic light emitting display device according to a second embodiment of the present invention.
3 is a diagram illustrating an organic light emitting display device according to a third embodiment of the present invention.
4 is a diagram illustrating an organic light emitting display device according to a fourth embodiment of the present invention.
5 is a diagram illustrating an organic light emitting display device according to a fifth embodiment of the present invention.
6 is a diagram illustrating an organic light emitting display device according to a sixth embodiment of the present invention.
7 is a diagram illustrating color coordinates for implementing a white color of an organic light emitting display device according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the invention is not limited to the embodiments described below and may be embodied in other forms. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 is a diagram illustrating an organic light emitting display device according to a first embodiment of the present invention.

Referring to FIG. 1, an organic light emitting display device according to an exemplary embodiment includes a plurality of unit pixels including a red subpixel R, a green subpixel G, a blue subpixel B, and an auxiliary subpixel M. Referring to FIG. An organic light emitting diode is formed on the device substrate 50. In addition, in the organic light emitting display device according to the present invention, each of the red subpixels R, the green subpixels G, the blue subpixels B, and the auxiliary subpixels M may emit light A and non-light emitting. Area N is divided.

The organic light emitting diode includes a first electrode 100, an organic light emitting layer 120, and a second electrode 130. The light emitting area A and the non-light emitting area N may be defined through a bank pattern 110 formed on the first electrode 100 to expose the first electrode 100 only in the light emitting area A. FIG. have.

The first electrode 100 is formed of an electrode portion 102 and a reflecting portion 101. The reflector 101 is formed of a metal material having a high reflectance such as aluminum (Al). In addition, the electrode portion 102 is formed of a transparent insulating material such as ITO. However, the material is not limited thereto.

The organic light emitting layer 120 is formed on the first electrode 100 exposed through the bank pattern. The organic light emitting layer 120 is composed of a single layer made of a light emitting material, or a hole injection layer (hole injection layer), a hole transporting layer (hole transporting layer), an emitting material layer (emitting material layer), an electron transporting layer ( electron transporting layer, and an electron injection layer. The second electrode 130 is formed on the organic light emitting layer 120.

The device substrate 50 includes a thin film transistor Tr for driving each sub pixel formed on the insulating substrate 10 formed of a material such as glass or plastic. The thin film transistor Tr includes a gate electrode formed on the insulating substrate 10, a gate insulating film covering the gate electrode, a semiconductor layer overlapping the gate electrode with the gate insulating film interposed therebetween, and a channel interposed therebetween. It may be composed of a source electrode and a drain electrode facing each other. The planarization layer 20 is formed on the thin film transistor Tr. The thin film transistor (Tr) drain electrode formed on the device substrate 50 is connected to the organic light emitting diode first electrode 100.

The protective layer 140 is formed on the organic light emitting diode, and the black matrix 150 and the color filter layers 160, 170, 180, and 190 are formed to correspond to the organic light emitting diode with the protective layer 140 interposed therebetween. The black matrix 150 is formed to correspond to the non-light emitting region N of the device substrate 50. In this case, the color filter layers 160, 170, 180, and 190 are formed to correspond to the light emitting area A of the device substrate 50.

The red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M have different optical thicknesses S, respectively. The optical thickness S is defined as a distance between the second electrode 130 and the reflector 101 of the first electrode 100.

More specifically, the optical thickness S of each of the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M is different so as to satisfy and optimize the microcavity condition. Can be formed. The optical thickness S of the red subpixel R satisfies the condition of the microcavity capable of emitting a wavelength of red light Red. In addition, the optical thickness S of the green subpixel G and the blue subpixel B also satisfies the conditions of the microcavity capable of emitting the wavelength of green light and the wavelength of blue light, respectively. . In addition, in the case of the auxiliary subpixel M, the condition of the microcavity capable of simultaneously emitting the wavelength of the red light Red and the wavelength of the blue light Bule is satisfied.

In this case, the optical thickness S for emitting the wavelength of red light and the optical thickness S for emitting the wavelength of blue light may be similar. That is, the red subpixel R and the blue subpixel B should emit only red light and blue light, respectively, but light may be mixed and emitted. To prevent this, the red sub-pixel R needs a red color filter 160 that transmits only the wavelength of red light. In addition, in the blue subpixel B, a blue color filter 180 that transmits only a wavelength of blue light is required.

In the green subpixel G, a green color filter 170 that transmits only a wavelength of green light may be formed. However, red light or blue light may not be emitted at an optical thickness S that satisfies the microcavity condition that transmits only the wavelength of green light. That is, even if only the optical thickness S is adjusted in the green sub-pixel G, only green light may be emitted, and the green color filter 170 may be omitted. If the color filter is not formed, there is an advantage that can reduce the unit cost and simplify the process.

In addition, in the sub-pixel M, the sub-pixel may emit light in which red light and blue light are mixed, and a color filter 190 may be formed to transmit wavelengths of red light and blue light. For example, a magenta color filter defined as a color in which red light and blue light are mixed may be formed. When the color filter 190 is formed in the auxiliary subpixel M, the contrast ratio is improved.

The optical thickness S may be adjusted by adjusting the thickness of the electrode portion 102 of the first electrode 100. That is, the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M are formed such that the electrode portions 102 of the first electrode 100 have different thicknesses. . The organic light emitting layer 120 and the second electrode 130 of the organic light emitting diode are formed on the first electrode 100 to have the same thickness.

As a result, the optical thicknesses of the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M may correspond to the thickness difference of the electrode portion 102 of the first electrode 100. There is a difference in S). The process of adjusting the thickness of the electrode portion 102 of the first electrode 100 may be variously applied.

The auxiliary subpixel M is used when the organic light emitting display according to the present invention requires a white implementation. More specifically, the light emitted from the auxiliary subpixel M is combined with the light emitted from the green subpixel G to realize white color.

Conventionally, in the organic light emitting display device which satisfies the microcavity, an optimal optical thickness S according to red, green, and blue is different from each other, and thus white is not implemented in a single subpixel. Therefore, in order to implement the white W, a combination of red light of the red subpixel R, blue light of the blue subpixel B, and green light of the green subpixel G was required. At this time, there was a problem that the efficiency of the white implementation is very low.

According to the organic light emitting display according to the present invention, the light emitted from the sub-pixel M may be combined with the light emitted from the green sub-pixel G to realize white color, thereby improving current efficiency and power consumption. .

2 is a diagram illustrating an organic light emitting display device according to a second embodiment of the present invention. Description overlapping with the first embodiment can be omitted.

Referring to FIG. 2, in the organic light emitting display according to the present invention, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M may be the same. In this case, the green subpixel G is formed to be different from the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M.

More specifically, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M simultaneously emits the wavelength of the red light Red and the wavelength of the blue light Bule. It satisfies the microcavity requirements. At this time, blue light is absorbed by the red color filter 160 in the red subpixel R, and only red light is emitted in the red subpixel R. In addition, in the blue subpixel B, only blue light is emitted by the blue color filter 180.

In the auxiliary sub-pixel M, a sub-pixel that emits a mixture of red light and blue light may be formed, and a color filter 190 may be formed to transmit wavelengths of red light and blue light. For example, a magenta color filter defined as a color in which red light and blue light are mixed may be formed. When the color filter 190 is formed in the auxiliary subpixel M, the contrast ratio is improved.

The optical thickness S of the green subpixel G satisfies the condition of the microcavity capable of emitting a wavelength of green light. The optical thickness S that satisfies the micro cavity effect in the green subpixel G is different from the optical thickness S that satisfies the micro cavity effect in the red subpixel R and the blue subpixel B. That is, even if only the optical thickness S is adjusted in the green sub-pixel G, only green light may be emitted, and the green color filter 170 may be omitted. If the color filter is not formed, there is an advantage that can reduce the unit cost and simplify the process.

The optical thickness S may be adjusted by adjusting the thickness of the electrode unit 202 of the first electrode 200. That is, the red subpixel R, the blue subpixel B, and the auxiliary subpixel M are formed such that the electrode portions 202 of the first electrode 200 have the same thickness. On the other hand, in the green subpixel G, the electrode portion 202 of the first electrode 200 is connected to the electrode portion 202 of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. It is formed to have a different thickness. In this case, the organic light emitting layer 120 and the second electrode 130 of the organic light emitting diode are formed on the first electrode 100 with the same thickness.

Accordingly, the optical thickness S and the green subpixels of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M may be changed by the thickness difference between the electrode portions 202 of the first electrode 200. A difference occurs in the optical thickness S of G). The process of adjusting the thickness of the electrode unit 202 of the first electrode 200 may be variously applied.

When the optical thicknesses S of the red subpixels R, the blue subpixels B, and the auxiliary subpixels M are the same, the process is simpler than the process of forming the optical thickness S of each subpixel. The cost can be reduced. In addition, the process can be simplified and emit desired light through the optical thickness S and the color filter.

3 is a diagram illustrating an organic light emitting display device according to a third embodiment of the present invention. Description overlapping with the first and second embodiments can be omitted.

Referring to FIG. 3, the red subpixel R and the blue subpixel B need only red light and blue light, respectively. Therefore, the red subpixel R and the blue subpixel B need a red color filter 160 and a blue color filter 180, respectively.

On the other hand, the auxiliary subpixel M needs to emit light in which red light and blue light are mixed. Already due to the optical thickness S of the auxiliary subpixel M itself, the auxiliary subpixel M satisfies the condition of the microcavity capable of simultaneously emitting the wavelength of the red light and the wavelength of the blue light. do.

Therefore, the auxiliary subpixel M may emit desired light even if the color filter is omitted, and unlike the first embodiment, the color filter 190 (see FIG. 1A) may be omitted. If the color filter is not formed, there is an advantage that can reduce the unit cost and simplify the process.

In addition, the green subpixel G satisfies the condition of the microcavity capable of emitting only the wavelength of green light (Green). That is, even if the color filter is omitted, such as the auxiliary sub-pixel M, desired light may be emitted due to the optical thickness S itself. Accordingly, although the green color filter 170 is illustrated in the green subpixel G, the green color filter 170 that transmits only the wavelength of the green light may be omitted. Each color filter is formed in a separate process, and if the green color filter 170 is omitted, the unit cost can be reduced and the process can be simplified.

4 is a diagram illustrating an organic light emitting display device according to a fourth embodiment of the present invention. Descriptions overlapping with the first to third embodiments may be omitted.

Referring to FIG. 4, the optical thickness S may be adjusted by adjusting the formation position of the reflector 301 of the first electrode 300. That is, the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M may have different positions at which the reflectors 301 of the first electrode 300 are formed. Can be formed.

More specifically, the reflector 301 may be disposed between the lower part, the upper part, and the electrode part 302 of the electrode part 302 according to the distance between the second electrode 130 and the reflecting part 301 required for each subpixel. It may be formed as needed. When the optical thickness S is adjusted according to the position of the reflector 301, the electrode part 302 of the first electrode 300 may be formed to have the same thickness in all subpixels. In addition, the organic light emitting layer 120 and the second electrode 130 of the organic light emitting diode are formed on the first electrode 300 with the same thickness.

The reflector 301 may be formed at the same position in the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. FIG. Accordingly, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M may be formed in the same manner. In this case, the reflector 301 of the first electrode 300 in the green subpixel G is different from the reflector 301 of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. Formed in position. That is, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M and the optical thickness S of the green subpixel G may be different from each other.

5 is a diagram illustrating an organic light emitting display device according to a fifth embodiment of the present invention. Descriptions overlapping with the first to fourth embodiments may be omitted.

Referring to FIG. 5, the first electrode 400 of the organic light emitting display device according to the present invention may include a reflector 401, an electrode 402, and a buffer layer 403. The buffer layer 403 may be formed of an insulating material such as a silicon nitride film or a silicon oxide film.

In this case, the optical thickness S of each pixel may be adjusted by adjusting the thickness or the formation position of the buffer layer 403 of the first electrode 400. That is, the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M each have a thickness or a forming position at which the buffer layer 403 of the first electrode 400 is formed. It can be formed differently.

In more detail, the buffer layer 403 is formed at the position and thickness of the buffer layer 403 according to the distance between the second electrode 130 and the reflecting portion 401 of the first electrode 400 required for the subpixel. In the drawing, although formed between the reflecting portion 401 and the electrode portion 402, it may be formed in various ways. In addition, although not shown in the drawing, the buffer layer 403 may include a contact hole so that the drain electrode of the thin film transistor Tr and the electrode portion 402 are electrically connected to each other.

When the optical thickness S is adjusted according to the buffer layer 403, the electrode part 402 and the reflecting part 401 of the first electrode 400 may be formed to have the same thickness in all subpixels. In addition, the organic light emitting layer 120 and the second electrode 130 of the organic light emitting diode are formed on the first electrode 400 with the same thickness.

The buffer layer 403 may be formed at the same position or at the same thickness in the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. FIG. Accordingly, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M may be formed in the same manner. In this case, in the green subpixel G, the buffer layer 403 of the first electrode 400 is positioned at a position different from that of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. Or different thicknesses. That is, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M and the optical thickness S of the green subpixel G may be different from each other.

6 is a diagram illustrating an organic light emitting display device according to a sixth embodiment of the present invention. Descriptions overlapping with the first to fifth embodiments may be omitted.

Referring to FIG. 6, the optical thickness S of the organic light emitting display device according to the present invention may be adjusted by adjusting the thickness of the organic light emitting layer 520. The process of adjusting the thickness of the organic light emitting layer 520 may be applied to various processes such as a mask process.

In this case, the thickness of the organic light emitting layer 520 may be adjusted by adjusting the thickness of some organic layers of the organic light emitting layer 520. In addition, the thickness of the organic light emitting layer may be controlled by adjusting the thickness of the organic layer formed under the light emitting layer such as the hole transport layer of the organic light emitting layer. That is, the red subpixel R, the green subpixel G, the blue subpixel B, and the auxiliary subpixel M may have different thicknesses of the organic light emitting layer 520.

More specifically, the thickness of the organic light emitting layer 520 may be formed in various thicknesses as necessary in consideration of the distance between the second electrode 130 and the reflecting portion 501 of the first electrode 500 required in the subpixel. Can be. When the optical thickness S is adjusted according to the thickness of the organic light emitting layer 520, the electrode part 502 and the reflecting part 501 of the first electrode 500 may be formed to have the same thickness in all subpixels. In addition, the second electrode 130 of the organic light emitting diode is formed on the first electrode 500 with the same thickness.

The organic light emitting layer 520 may be formed to have the same thickness in the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. Accordingly, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M may be formed in the same manner. In this case, the thickness of the organic light emitting layer 520 in the green subpixel G is different from the thickness of the organic light emitting layer 520 of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M. . That is, the optical thickness S of the red subpixel R, the blue subpixel B, and the auxiliary subpixel M and the optical thickness S of the green subpixel G may be different from each other.

7 is a diagram illustrating color coordinates for implementing a white color of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the organic light emitting display device according to the present invention may implement a white color W by combining light emitted from the green subpixel G and the auxiliary subpixel M. FIG. In the conventional organic light emitting display device that satisfies the microcavity, the red light of the red subpixel (R) and the blue light of the blue subpixel (B) and the green light of the green subpixel (G) are implemented in order to implement white (W). Combination is required. In the organic light emitting display device according to the present invention, a mixture of red and blue light is emitted from the auxiliary subpixel M, and thus, a combination of the red subpixel R and the blue subpixel B is not necessary. .

The effects of this are as follows. When the red subpixel R and the blue subpixel B are combined without the conventional subpixel M, after adjusting the optical thickness S for each subpixel as in the present invention, red light and blue light are adjusted. The current efficiencies of combining red and blue light and omitting the color filter through a color filter that transmits the wavelength were compared.

Red subpixel (R) and blue subpixel (B) Secondary subpixel (M) with color filter Auxiliary subpixel (M) without color filter Current efficiency
(cd / A) 19.8 22.4 28.2

In this case, as shown in Table 1, the organic light emitting display device according to the present invention includes an auxiliary sub-pixel M, and thus it can be confirmed that the current efficiency is much improved compared to the prior art. The effects of the organic light emitting display device according to the present invention will be described in more detail as follows.

Invention The present invention RGBW
(Without microcavity) RGB
(Micro Cavity applied) RGBM
(With sub-pixel color filter) RGBM
(Without sub-pixel color filter) R
Current efficiency (cd / A) 6.2 15.9 15.9 15.9 G
Current efficiency (cd / A) 28.2 79.7 79.7 79.7 B
Current efficiency (cd / A) 2.7 3.9 3.9 3.9 W
Current efficiency (cd / A) 69.3 24.7 (R + G + B) 39.5 (G + M) 44.6 (G + M) Power Consumption (mW) 332 310 252 226

Referring to Table 2, red (R), blue (B) and green (when applying a micro cavity, compared to a conventional organic light emitting display device having a white subpixel separately without using a conventional micro cavity, It can be seen that the current efficiency of G) is significantly different and that the application of the microcavity improves the current efficiency of red (R), blue (B) and green (G). In addition, power consumption can also be improved when applying micro-cavities.

Compared to an organic electroluminescent display device which applies a conventional micro-cavity and consists of red subpixels (R), green subpixels (G), and blue subpixels (B), the present invention includes an auxiliary subpixel (M). It can be seen that the white current efficiency is improved. In addition, it is possible to confirm the improved power consumption compared with the conventional organic light emitting display device.

Therefore, the organic light emitting display device according to the present invention can realize white color by combining the auxiliary subpixel and the green subpixel by adding the auxiliary subpixel, which is larger than when the red subpixel and the blue subpixel are combined. Can have efficiency. In addition, the organic light emitting display device according to the present invention can reduce power consumption and improve lifespan.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

50: device substrate 140: protective layer
100,200,300: first electrode 150: black matrix
101,201,301: reflector 160: red color filter
102, 202, 302: electrode 170: green color filter
110: bank pattern 180: blue color filter
120: organic light emitting layer 190: auxiliary color filter
130: second electrode

Claims (15)

A substrate having a plurality of unit pixels including a red subpixel, a green subpixel, a blue subpixel, and an auxiliary subpixel;
A first electrode formed on the substrate and including an electrode portion and a reflecting portion;
An organic light emitting layer formed on the first electrode;
A second electrode formed on the organic light emitting layer; And
And a color filter formed on the second electrode.
The auxiliary sub-pixel emits a mixture of red light and blue light,
And the color filter is formed only in the red subpixel, the blue subpixel, and the auxiliary subpixel among the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel. .
The method of claim 1,
In the red subpixel, green subpixel, blue subpixel and auxiliary subpixel,
The distance between the second electrode and the reflecting portion of the first electrode is different, the organic light emitting display device.
The method of claim 2,
And the thicknesses of the electrode portions of the first electrode in the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel are different from each other.
The method of claim 2,
And the positions where the reflection portions of the first electrodes are formed in the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel, respectively.
The method of claim 2,
The first electrode further includes a buffer layer,
And the thickness of the buffer layer of the first electrode is different in the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel.
The method of claim 2,
And the thicknesses of the organic light emitting layer in the red subpixel, the green subpixel, the blue subpixel, and the auxiliary subpixel are different from each other.
The method of claim 1,
In the red subpixel, the blue subpixel, and the auxiliary subpixel, the distances between the second electrode and the reflecting portion of the first electrode are the same,
The distance from the green subpixel to the reflecting portion of the second electrode and the first electrode is equal to the reflecting portion of the second electrode and the first electrode formed from the red subpixel, the blue subpixel, and the auxiliary subpixel. An organic light emitting display device which is different from a distance.
The method of claim 7, wherein
In the red subpixel, the blue subpixel and the auxiliary subpixel, the thickness of the electrode portion of the first electrode is the same,
The thickness of the electrode portion of the first electrode in the green subpixel is different from the thickness of the electrode portion of the first electrode in the red subpixel, blue subpixel, and auxiliary subpixel.
The method of claim 7, wherein
In the red subpixel, the blue subpixel, and the auxiliary subpixel, the positions at which the reflecting portion of the first electrode is formed are the same,
The position at which the reflector of the first electrode is formed in the green subpixel is different from the position at which the reflector of the first electrode is formed in the red subpixel, blue subpixel, and auxiliary subpixel. .
The method of claim 7, wherein
The first electrode further includes a buffer layer,
In the red subpixel, the blue subpixel, and the auxiliary subpixel, the thickness of the buffer layer of the first electrode is the same,
The thickness of the buffer layer of the first electrode in the green subpixel is different from the thickness of the buffer layer of the first electrode in the red subpixel, blue subpixel, and auxiliary subpixel.
The method of claim 7, wherein
In the red subpixel, the blue subpixel, and the auxiliary subpixel, the thickness of the organic light emitting layer is the same,
And a thickness of the organic light emitting layer in the green subpixel is different from a thickness of the organic light emitting layer in the red subpixel, the blue subpixel, and the auxiliary subpixel.
The method of claim 1,
And a color filter configured to transmit wavelengths of red light and blue light in response to the auxiliary sub-pixels.
delete delete The method of claim 1,
And an white color through the green subpixel and the subpixel.

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