KR101818255B1 - Organic electroluminescent display device and method for fabricating the same - Google Patents

Abstract

The present invention discloses an organic electroluminescence display device and a method of manufacturing the same. The organic electroluminescent display of the present invention includes a first substrate divided into red, green and blue subpixels, first and second switching elements formed in red and green subpixel regions of the first substrate, A first substrate having first and second positive electrodes connected to the first and second switching elements, and a first organic light emitting layer formed on a front surface of the first substrate on which the first and second positive electrodes are formed, A third switching element formed in the blue sub-pixel region of the second substrate, and a third positive electrode coupled to the third switching element, wherein the red, green, and blue color filter layers are formed in the red and green sub- And a second organic light emitting layer formed on the front surface of the second substrate on which the red and green color filter layers and the third positive electrode are formed.
INDUSTRIAL APPLICABILITY The organic electroluminescence display device and the method of manufacturing the same according to the present invention can be used for forming an organic light emitting layer of an organic electroluminescence display device by coating the organic light emitting layer on a substrate without using a shadow mask, It is possible to prevent deterioration of the production yield due to the above-mentioned problems.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic electroluminescent display device,

The present invention relates to an organic light emitting display and a method of manufacturing the same.

Recently, researches for increasing the display quality of a flat panel display device and attempting to make it larger have been actively conducted. Of these, an organic electroluminescent display device is a self-luminous element that emits light by itself. The organic light emitting display emits light by forming excitons through the combination of electrons and holes carriers, thereby displaying a video image.

The organic light emitting display device has excellent characteristics such as a wide viewing angle, a high speed response, and a high contrast ratio. Therefore, the organic light emitting display device can be used as a pixel of a graphic display, a television image display, or a surface light source It is thin, light and well-suited for next-generation flat panel displays.

The driving method of the organic light emitting display device is classified into a passive matrix type which does not include a separate thin film transistor, and an active matrix organic light emitting display device which includes a thin film transistor.

In the organic light emitting display, organic light emitting devices are formed in respective pixel regions. The organic light emitting device includes an organic light emitting layer formed of an organic light emitting material with an anode and a cathode sandwiched therebetween.

The organic light emitting layer of the organic light emitting device includes a plurality of functional layers (a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, etc.) .

The organic light emitting layer formed in the pixel region of the organic light emitting display device is generally formed by depositing an organic light emitting material on a substrate using a vacuum deposition process.

In the vacuum deposition process, the organic luminescent material forming the organic luminescent layer is placed in an evaporation source having an outlet, the evaporation source is heated in a chamber where the vacuum is maintained to discharge the evaporated organic luminescent material through the discharge port, The material is deposited on the substrate away from the vapor source.

In the fabrication of such an organic light emitting display, when a plurality of organic light emitting layers having a desired pattern are formed, a deposition process is performed using a shadow mask having a plurality of opening patterns.

That is, a shadow mask having a plurality of openings may be placed close to the substrate, and the organic luminescent material may be deposited on the substrate through the shadow mask to form an organic luminescent layer having a plurality of spacing patterns in a predetermined pattern.

FIG. 1 is a view showing a state in which an organic light emitting layer of an organic light emitting display is generally formed. As shown in FIG. 1, red (R), green G) and a blue (B) organic luminescent layer are formed on the substrate 10 by heating a boat 20 including an organic luminescent material.

That is, when the substrate 10 is loaded in the chamber for forming the organic light emitting layer, the shadow mask 30 seated on the mask frame 15 is aligned with the substrate 10. Then, the boat 20 containing the red, green and blue organic luminescent materials is heated to form a red organic luminescent layer R, a green organic luminescent layer G and a blue organic luminescent layer B sequentially . At this time, in order to form the red, green, and blue organic light emitting layers in the respective sub pixel regions, the shadow masks corresponding to the red, green, and blue subpixels are alternately exchanged and work is performed.

However, when the organic light emitting layer is formed using the shadow mask 30 as described above, organic light emitting materials are not uniformly formed on the substrate 10. In order to improve this, the distance between the shadow mask 30 and the boat 20 is increased. However, foreign substances are generated due to contact between the shadow mask 30 and the substrate 10, and defective positions of the organic light emitting layers are generated.

Also, as the size of the organic electroluminescence display device becomes larger, the size of the shadow mask to be used must be increased. However, when the size of the shadow mask increases, warpage occurs around the center and it is difficult to form the organic light emitting layer precisely.

An object of the present invention is to provide an organic electroluminescent display device capable of realizing a large area and high resolution by separately forming organic electroluminescent layers of an organic electroluminescent display device on two substrates and a method of manufacturing the same.

The present invention also provides a method of forming an organic light emitting layer on a substrate by coating an organic light emitting layer on the substrate without using a shadow mask when forming an organic light emitting layer of the organic electroluminescence display device so as to prevent a decrease in production yield due to the use of a shadow mask And a method of manufacturing the same.

According to an aspect of the present invention, there is provided an organic light emitting display including a first substrate divided into red, green, and blue subpixels, and a second substrate formed on the red and green subpixel regions of the first substrate. First and second switching elements, first and second positive electrodes connected to the first and second switching elements, and first and second positive electrodes formed on a front surface of the first substrate on which the first and second positive electrodes are formed, A red and green color filter layer formed on the red and green sub pixel regions of the second substrate; a third switching element formed on the blue sub pixel region of the second substrate; 3 switching element, and a second organic light emitting layer formed on a front surface of the second substrate on which the red and green color filter layers and the third positive electrode are formed.

According to another aspect of the present invention, there is provided a method of manufacturing an organic electroluminescent display, comprising: forming first and second switching elements in red and green subpixel regions on a first substrate divided into red, green, and blue subpixels; Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements; Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate; Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed; Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate; Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate; Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate; Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed; Forming a second negative electrode in a blue sub-pixel region of the second organic light emitting layer and completing an upper substrate; And bonding the upper substrate and the lower substrate to an adhesive layer.

According to another aspect of the present invention, there is provided a method of fabricating an organic light emitting display, comprising: forming first and second switching elements in red and green subpixel regions on a first substrate divided into red, green, and blue subpixels; ; Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements; Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate; Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed; Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate; Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate; Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate; Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed; Forming a second negative electrode in a blue subpixel region of the second organic emission layer and forming a reflector in a blue subpixel region of the second negative electrode to complete an upper substrate; And bonding the upper substrate and the lower substrate to an adhesive layer.

According to another aspect of the present invention, there is provided a method of fabricating an organic light emitting display device, including: forming first and second switching elements in red and green subpixel regions on a first substrate divided into red, green, and blue subpixels, ; Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements; Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate; Forming a reflective plate on a blue sub-pixel region of the first substrate; Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed; Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate; Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate; Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate; Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed; Forming a second negative electrode in a blue sub-pixel region of the second organic light emitting layer and completing an upper substrate; And bonding the upper substrate and the lower substrate to an adhesive layer.

The organic electroluminescence display device and the method of manufacturing the same according to the present invention can realize large area and high resolution by forming the organic light emitting layers of the organic electroluminescence display device on two substrates.

In addition, the organic electroluminescence display device and the method of manufacturing the same of the present invention can be used for forming an organic light emitting layer of an organic electroluminescence display device by completely coating the organic light emitting layer on a substrate without using a shadow mask, It is possible to prevent the production yield from being lowered due to the occurrence of defects.

1 is a view showing a state in which an organic light emitting layer of an organic light emitting display device is formed.
2A to 2G are views illustrating a method of manufacturing an organic light emitting display according to a first embodiment of the present invention.
3A to 3G are views illustrating a method of manufacturing an organic light emitting display according to a second embodiment of the present invention.
4A to 4F are views illustrating a method of manufacturing an organic light emitting display according to a third 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 by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

2A to 2G are views illustrating a method of manufacturing an organic light emitting display according to a first embodiment of the present invention.

Referring to FIGS. 2A to 2G, a first substrate 100 is provided, and a plurality of sub-pixels are defined on the first substrate 100 by crossing gate wirings and data wirings Thin film transistors (TFTs), which are switching elements, are formed only in the red and green subpixels of the respective subpixel units. That is, in the first embodiment of the present invention, the switching elements are formed only in the red and green sub-pixel regions on the first substrate 100, and the switching elements corresponding to the blue sub-pixels are formed on the second substrate 200).

In the present invention, three subpixels displaying red (R), green (G), and blue (B) will be mainly described.

As shown in the drawing, a first switching device T1 and a second switching device T2 are formed on red and green subpixels on a first substrate 100, and first and second switching devices T1 and T2 A protective layer 101 is formed on the front surface of the first substrate 100.

Though not shown in the structure of the switching elements T1 and T2, a top gate or bottom gate type thin film transistor generally used in organic light emitting display devices may be formed.

As described above, when the passivation layer 101 is formed on the first substrate 100, an organic film is formed on the entire surface of the first substrate 100 after the contact hole process, The first bank pattern 103 for separating the respective subpixels is formed. The drain electrodes of the first and second switching elements T1 and T2 are exposed in the contact hole process.

Then, a metal film is formed on the first substrate 100, and then a mask process and an etching process are performed to form a first positive electrode 120a and a second positive electrode 120b ). The metal film may be formed of any one of Mg, Ca, Al, Ag, Li, and alloys thereof.

However, after the protective layer 101 is formed on the first substrate 100 and the contact hole process is performed, a first positive electrode 120a and a second positive electrode 120b are formed, The first bank pattern 103 separating the subpixels of the first subpixel 103 can be formed.

2B and 2C, a first organic light emitting layer 105 and a first negative electrode 106 are sequentially formed on the first substrate 100 to form an organic light emitting display The lower substrate 110 is completed. The first negative electrode 106 may be formed of a transparent conductive material such as ITO, IZO, or AZO.

The first organic emission layer 105 may be formed of an organic material capable of emitting red and green light.

2D, when the lower substrate 110 of the organic light emitting display device is completed, the third switching device T3 is formed in the blue sub-pixel region on the second substrate 200, The insulating layer 201 is formed on the entire surface of the second substrate 200 on which the third switching element T3 is formed. The third switching device T3 is formed in the same structure as the first and second switching devices T1 and T2 formed on the first substrate 100 and has the same function.

That is, the first, second, and third switching elements T1, T2, and T3 are formed in the red (R), green (G), and blue (B) subpixels of the organic light emitting display device, The first and second switching elements T1 and T2 corresponding to the green subpixels are formed on the lower substrate 110 and the third switching element T3 corresponding to the blue subpixel is formed on the upper substrate 210, The second substrate 200 of FIG.

In addition, the insulating layer 201 may be a planarization layer or a plurality of layers.

As described above, when the third switching element T3 and the insulating layer 201 are formed on the second substrate 200, a metal film such as Cr or an opaque resin layer is formed on the insulating layer 201 A mask process is performed to form a second bank pattern 203 for partitioning each sub-pixel.

When the second bank pattern 203 is formed on the second substrate 200 as described above, the red color filter layer R and the green color filter layer G are formed on the first positive electrode 120a of the first substrate 100 And the second positive electrode 120b, respectively, in the red and green sub-pixel regions.

In addition, a metal film is formed on the second substrate 200, and then a mask process is performed to form a third positive electrode 120c in the blue sub-pixel region.

Unlike the first and second positive electrodes 120a and 120b formed on the first substrate 100, the third positive electrode 120c may be formed of a transparent conductive material such as ITO, IZO, or AZO have.

As described above, when the red color filter layer R, the green color filter layer G and the third positive electrode 120c are formed on the second substrate 200, as shown in FIG. 2E, The second organic emission layer 205 is formed on the entire surface of the second organic emission layer 200. Unlike the first organic emission layer 105, the second organic emission layer 205 is formed of an organic material that generates blue light.

A second negative electrode 206 is then formed on the second organic emission layer 205 of the second substrate 200 to complete the upper substrate 210 of the organic light emitting display. The second negative electrode 206 is formed on the second organic emission layer 205 corresponding to the blue sub-pixel region where the red and green color filter layers R and G are not formed.

The method for forming the second negative electrode 206 includes forming a light-to-heat conversion layer 222, a buffer layer 221, and an electrode film composed of a metal layer on the base substrate 223 Is formed on the second organic light emitting layer 105 and then irradiated with a laser to a region where the second negative electrode 206 is to be formed.

When the electrode film is irradiated with a laser beam, high temperature heat is generated in the photo-thermal conversion layer 222, so that a metal layer formed on the buffer layer 221 is adhered to the second organic emission layer 205, Two negative electrodes 206 are formed. Though not shown in the drawing, 207, which is not illustrated, is a sacrificial layer and is a metal layer remaining on the electrode film after the second negative electrode 206 is formed.

The second negative electrode 206 may be formed of an opaque metal having a high reflectivity, unlike the first negative electrode 206. This is because the blue light generated in the second organic emission layer 205 is reflected by the second negative electrode 206 and transmitted through the third positive electrode 120c to be emitted to the back surface of the second substrate 200 .

When the upper substrate 210 including the red and green color filter layers R and G and the third switching device T3 in the blue sub-pixel region is completed, as shown in FIG. 2G, The organic light emitting display 210 and the lower substrate 110 are bonded together using an adhesive layer 250 to complete an organic light emitting display.

In the organic light emitting display device according to the first embodiment of the present invention, red and green color filter layers (R, G) are formed in regions corresponding to red and green subpixels, A blue color filter layer is not formed and a second organic light emitting layer 205 for generating blue light is formed.

The organic light emitting display according to the first embodiment of the present invention may be configured such that the first and second organic light emitting layers 105 and 205 are formed on the first and second substrates 100 and 200 without forming a shadow mask, The use of the shadow mask does not cause the conventional problems to occur.

In addition, in the red subpixel, the light including the wavelength of the red light and the wavelength of the green light in the first organic light emitting layer 105 and the blue light generated in the second organic light emitting layer 205 are mixed and then passed through the red color filter layer R So that red light can be emitted.

By the same principle, green light is emitted in the green subpixel and blue light generated in the second organic light emitting layer 205 in the blue subpixel region can be transmitted through the third transparent electrode 120c. Therefore, the organic light emitting display device of the present invention can emit red, green, and blue light in each subpixel, thereby displaying an image.

INDUSTRIAL APPLICABILITY The organic electroluminescence display device and the method of manufacturing the same according to the present invention can form an organic light emitting layer of an organic electroluminescence display device on two substrates by coating or vapor deposition, .

In addition, the organic electroluminescence display device and the method of manufacturing the same of the present invention have the effect of preventing the production yield from being lowered due to foreign matter generation without using a shadow mask when forming the organic light emitting layer of the organic electroluminescence display device.

3A to 3G are views illustrating a method of manufacturing an organic light emitting display according to a second embodiment of the present invention.

The second embodiment of the present invention will be described mainly on the basis of the first embodiment. The parts of the first embodiment that are not specifically described in the second embodiment can be equally applied.

3A to 3G, a first switching device T1 and a second switching device T2 are formed on the first substrate 100 in red and green subpixels, and the first and second switching devices T1, A protective layer 101 is formed on the first and second substrates T1 and T2.

As described above, when the passivation layer 101 is formed on the first substrate 100, an organic film is formed on the entire surface of the first substrate 100 after the contact hole process, A first bank pattern 103 for separating the respective red, green and blue subpixels is formed by the process.

Then, a metal film is formed on the first substrate 100, and then a mask process and an etching process are performed to form a first positive electrode 120a and a second positive electrode 120b in the red and green sub- .

However, after the passivation layer 101 is formed on the first substrate 100 and the contact hole process is performed, a first positive electrode 120a and a second positive electrode 120b ), And then form a first bank pattern 103 for separating each of the sub-pixels.

3B and 3C, a first organic light emitting layer 105 and a first negative electrode 106 are formed on the first substrate 100, (110). The first negative electrode 106 may be formed of a transparent conductive material such as ITO, IZO, or AZO.

The first organic emission layer 105 is formed of an organic material capable of emitting red and green wavelength light.

As shown in FIG. 3D, when the lower substrate 110 of the organic light emitting display device is completed as described above, the third switching device T3 and the insulating layer 201 are formed on the second substrate 200 do. The third switching element T3 may be formed in a blue sub-pixel region, and the insulating layer 201 may be a planarization layer or a plurality of layers.

As described above, when the third switching element T3 and the insulating layer 201 are formed on the second substrate 200, a metal film such as Cr or an opaque resin layer is formed on the insulating layer 201 And then a mask process is performed to form a second bank pattern 203 for partitioning a plurality of sub-pixels formed on the first substrate 100.

When the second bank pattern 203 is formed on the second substrate 200 as described above, the red color filter layer R and the green color filter layer G are formed on the first positive electrode 120a of the first substrate 100 And the second positive electrode 120b, respectively, in the red and green sub-pixel regions.

In addition, a metal film is formed on the second substrate 200 in the blue sub-pixel region, and then the mask process is performed to form the third positive electrode 120c.

Unlike the first and second positive electrodes 120a and 120b formed on the first substrate 100, the third positive electrode 120c may be formed of a transparent conductive material such as ITO, IZO, or AZO have.

As described above, when the red color filter layer R, the green color filter layer G and the third positive electrode 120c are formed on the second substrate 200, as shown in FIGS. 3E and 3F, A second organic light emitting layer 205 and a second negative electrode 306 are formed on the entire surface of the substrate 200 to generate blue light. The second negative electrode 306 may be formed of a transparent conductive material such as the first negative electrode 106.

Next, a reflective plate 307 is formed on the second negative electrode 306 corresponding to the blue sub-pixel to complete the upper substrate 310,

The method of forming the reflection plate 307 may include forming a metal film composed of a heating film 334 formed on a base substrate 333, first and second buffer layers 322 and 321 and a metal layer on the second negative electrode 306 And then a blue sub-pixel region in which the reflection plate 307 is to be formed is formed by irradiating a laser or by applying a high voltage to the heat generating film 334.

The heating film 334 may be made of the same metal as Mo, which is well absorbed by heat. In addition, the heat generating film 334 is patterned on the base substrate 333 corresponding to the blue sub-pixel.

When the laser is irradiated or a high voltage is applied, high temperature heat is generated in the heat generating film 334, and a metal layer formed on the second buffer layer 321 is adhered to the second negative electrode 306 And a reflection plate 307 is formed. Although not shown in the drawing, a sacrificial layer 308, which is not described, is a metal layer remaining on the metal film after the reflection plate 307 is formed.

The reflective plate 307 transmits blue light generated from the second organic light emitting layer 205 to the back surface of the second substrate 200 after being transmitted through the second negative electrode 306 and then reflected by the reflection plate 307 .

3G, when the upper substrate 310 including the red and green color filter layers R and G and the third switching device T3 in the blue sub pixel area is completed, The upper substrate 310 and the lower substrate 110 are bonded to each other with an adhesive layer 250 to complete the organic light emitting display.

In the organic light emitting display device according to the second embodiment of the present invention, red and green color filter layers (R, G) are formed in regions corresponding to red and green subpixels, The blue color filter layer is not formed, and the blue light is generated by the second organic emission layer 205 that generates blue light.

In addition, the first and second organic emission layers 105 and 205 of the organic light emitting display according to the second embodiment of the present invention are not formed for each subpixel using a shadow mask, The conventional problems caused by using the shadow mask do not occur because they are formed by coating or vapor deposition processes on the respective substrates 100 and 200, respectively.

In addition, in the red subpixel, the light including the wavelength of the red light and the wavelength of the green light in the first organic light emitting layer 105 and the blue light generated in the second organic light emitting layer 205 are mixed and then passed through the red color filter layer R The red light is emitted in the red subpixel region.

According to the same principle, green light is emitted by the green color filter in the green subpixel and blue light generated by the second organic emission layer 205 in the blue subpixel region is transmitted through the third transparent electrode 120c .

Since the organic light emitting display of the present invention is formed by separating the organic light emitting layer of the organic electroluminescence display device on two substrates without forming a shadow mask, Can be implemented.

In addition, the organic electroluminescence display device and the method of manufacturing the same of the present invention have the effect of preventing the production yield from being lowered due to foreign matter generation without using a shadow mask when forming the organic light emitting layer of the organic electroluminescence display device.

4A to 4F are views illustrating a method of manufacturing an organic light emitting display according to a third embodiment of the present invention.

In the third embodiment of the present invention, the distinction from the first and second embodiments will be mainly described. Therefore, the first and second embodiments can be equally applied to portions not specifically described.

As shown in FIGS. 4A to 4F, a first switching device T1 and a second switching device T2 are formed on the first substrate 100 in units of red and green subpixels, and the first and second switching devices T1, A protective layer 101 is formed on the elements T1 and T2.

As described above, when the passivation layer 101 is formed on the first substrate 100, an organic film is formed on the entire surface of the first substrate 100 after the contact hole process, The first bank pattern 103 for separating the respective subpixels is formed.

Then, a metal film is formed on the first substrate 100, and then a mask process and an etching process are performed to form a first positive electrode 120a and a second positive electrode 120b in each sub pixel region, Thereby forming a reflection plate 407. That is, the first positive electrode 120a, the second positive electrode 120c, and the reflective plate 407 are simultaneously formed in the regions corresponding to red, green, and blue subpixels, respectively.

However, after the protective layer 101 is formed on the first substrate 100 and the contact hole process is performed, the first positive electrode 120a and the second positive electrode 120b and the reflective plate 407 The first bank pattern 103 separating each subpixel can be formed.

4B and 4C, a first organic light emitting layer 105 and a first negative electrode 106 are formed on the first substrate 100, (410). The first negative electrode 106 may be formed of a transparent conductive material.

The first organic emission layer 105 is formed of an organic material capable of emitting red and green wavelength light.

4D, when the lower substrate 110 of the organic light emitting display device is completed, the third switching device T3 and the insulating layer 201 are formed on the second substrate 200. In this case, do. In addition, the third switching element T3 may be formed in a blue sub-pixel region, and the insulating layer 201 may be a planarization layer or a plurality of layers.

As described above, when the third switching element T3 and the insulating layer 201 are formed on the second substrate 200, a metal film such as Cr or an opaque resin layer is formed on the insulating layer 201 A mask process is performed to form a second bank pattern 203 for partitioning a region corresponding to a plurality of sub-pixels formed on the first substrate 100.

When the second bank pattern 203 is formed on the second substrate 200 as described above, the red color filter layer R and the green color filter layer G are formed on the first positive electrode 120a of the first substrate 100 And the second positive electrode 120b, respectively.

In addition, a metal film is formed on the second substrate 200 in the blue sub-pixel region, and then the mask process is performed to form the third positive electrode 120c.

Unlike the first and second positive electrodes 120a and 120b formed on the first substrate 100, the third positive electrode 120c may be formed of a transparent conductive material such as ITO, IZO, or AZO have.

When the red color filter layer R, the green color filter layer G and the third positive electrode 120c are formed on the second substrate 200 as described above, as shown in FIG. 4E, A second organic emission layer 205 and a second negative electrode 306 are formed on the entire surface of the first substrate 200 to generate blue light to complete the upper substrate 510. The second negative electrode 306 may be formed of a transparent conductive material such as the first negative electrode 106.

As shown in FIG. 4F, when the upper substrate 510 including the red and green color filter layers R and G and the third switching device T3 in the blue sub-pixel area is completed, The organic light emitting display 510 and the lower substrate 410 are bonded together using an adhesive layer 250 to complete the organic light emitting display.

In the organic light emitting display device according to the third embodiment of the present invention, red and green color filter layers (R, G) are formed in regions corresponding to red and green subpixels, A blue color filter layer is not formed and a second organic light emitting layer 205 for generating blue light is formed.

The first and second organic light emitting layers 105 and 205 of the organic electroluminescence display device according to the second embodiment of the present invention may be formed on the first and second substrates 100 and 200 without forming a shadow mask, Since the shadow mask is formed by a coating or a deposition process, the problems caused by using the conventional shadow mask do not occur.

100: first substrate 101: protective layer
103: first bank pattern 105: first bank pattern 105:
106: first negative electrode 200: second substrate
201: insulating layer 205: second organic light emitting layer
206: second negative electrode 120a: first negative electrode
120b: second positive electrode 120c: third positive electrode

Claims (19)

A first substrate divided into red, green and blue subpixels, first and second switching elements formed in red and green subpixel regions of the first substrate, and first and second switching elements connected to the first and second switching elements, And a first organic light emitting layer formed on an entire surface of the first substrate on which the first and second positive electrodes and the first and second positive electrodes are formed,
A second substrate, a red and green color filter layer formed on the red and green sub pixel regions of the second substrate, a third switching element formed on the blue sub pixel region of the second substrate, and a third switching element formed on the third substrate, And a second organic light emitting layer formed on the front surface of the second substrate on which the red and green color filter layers and the third positive electrode are formed.
The organic light emitting display as claimed in claim 1, wherein the first organic emission layer is formed of an organic material that generates light having a red wavelength and a green wavelength.
The organic light emitting display as claimed in claim 1, wherein the second organic emission layer is formed of an organic material that generates light having a blue wavelength.
The organic electroluminescent display device according to claim 1, wherein the first and second electrodes of the lower substrate are formed of any one of Mg, Ca, Al, Ag, Li, and alloys thereof.
The organic light emitting display as claimed in claim 1, wherein the third electrode of the upper substrate is formed of a transparent conductive material such as ITO, IZO, or AZO.
The organic light emitting display as claimed in claim 1, wherein a first negative electrode is formed on the first organic emission layer of the lower substrate.
The organic light emitting display as claimed in claim 1, wherein a second negative electrode is formed in the blue sub-pixel region on the second organic light emitting layer.
The organic light emitting display as claimed in claim 1, wherein a second negative electrode is formed on a front surface of the second organic light emitting layer.
The organic light emitting display according to claim 8, wherein a reflective plate is formed on a blue pixel region of the lower substrate.
Forming first and second switching elements in red and green subpixel regions on a first substrate, the first and second switching elements being divided into red, green, and blue subpixels;
Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements;
Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate;
Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed;
Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate;
Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate;
Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate;
Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed;
Forming a second negative electrode in a blue sub-pixel region of the second organic light emitting layer and completing an upper substrate; And
And bonding the upper substrate and the lower substrate to an adhesive layer.
11. The method according to claim 10, wherein the first organic emission layer is formed of an organic material that generates light having a red wavelength and a green wavelength.
11. The method according to claim 10, wherein the second organic emission layer is formed of an organic material that generates light having a blue wavelength.
The organic electroluminescent display device according to claim 10, wherein the first and second positive electrodes of the lower substrate are formed of one of a metal selected from the group consisting of Mg, Ca, Al, Ag, Li, Way.
11. The method of claim 10, wherein the third electrode of the upper substrate is formed of a transparent conductive material such as ITO, IZO, or AZO.
11. The method according to claim 10, wherein a first negative electrode is formed on the first organic emission layer of the lower substrate.
The method of claim 10, wherein the second negative electrode comprises: attaching an electrode film composed of a base substrate, a photo-thermal conversion layer, a buffer layer, and a metal layer on the second organic emission layer;
Forming a second negative electrode by irradiating a laser beam onto an electrode film corresponding to the blue sub-pixel region of the second organic emission layer and attaching a part of the metal layer on the second organic emission layer, Device manufacturing method.
Forming first and second switching elements in red and green subpixel regions on a first substrate, the first and second switching elements being divided into red, green, and blue subpixels;
Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements;
Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate;
Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed;
Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate;
Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate;
Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate;
Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed;
Forming a second negative electrode in a blue subpixel region of the second organic emission layer and forming a reflector in a blue subpixel region of the second negative electrode to complete an upper substrate; And
And bonding the upper substrate and the lower substrate to an adhesive layer.
18. The method of claim 17, wherein the reflective plate is formed by: attaching a metal film composed of a base substrate, a heating film, a first buffer layer, a second buffer layer, and a metal layer on the second negative electrode; And
A step of irradiating a laser to the metal film corresponding to the blue sub-pixel region of the second negative electrode or applying a high voltage to the heating film to attach a part of the metal layer on the second negative electrode to form a reflector Wherein the organic electroluminescent display device comprises a plurality of organic electroluminescent display devices.
Forming first and second switching elements in red and green subpixel regions on a first substrate, the first and second switching elements being divided into red, green, and blue subpixels;
Forming a protective layer on the first substrate on which the first and second switching elements are formed, and performing a contact hole process for exposing drain electrodes of the first and second switching elements;
Forming first and second positive electrodes electrically connected to the first and second switching elements in the red and green sub-pixel regions of the first substrate;
Forming a reflective plate on a blue sub-pixel region of the first substrate;
Forming a first organic emission layer on a first substrate on which the first and second electrodes are formed;
Forming a first negative electrode on the first substrate on which the first organic light emitting layer is formed to complete a lower substrate;
Forming a third switching element in the blue sub-pixel region on the second substrate and forming an insulating layer on the second substrate;
Forming red and green color filter layers in the red and green subpixel regions of the second substrate and forming a third positive electrode in the blue subpixel regions of the second substrate;
Forming a second organic light emitting layer on the second substrate on which the red and green color filter layers and the third positive electrode are formed;
Forming a second negative electrode in a blue sub-pixel region of the second organic light emitting layer and completing an upper substrate; And
And bonding the upper substrate and the lower substrate to an adhesive layer.

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