KR101703175B1

KR101703175B1 - Organic light emitting diode display device

Info

Publication number: KR101703175B1
Application number: KR1020150152645A
Authority: KR
Inventors: 김강현; 양기섭
Original assignee: 엘지디스플레이 주식회사
Priority date: 2015-10-30
Filing date: 2015-10-30
Publication date: 2017-02-06

Abstract

The present invention provides an organic light emitting diode display device capable of improving thickness uniformity of an organic light emitting layer, comprising: a substrate including a display area including a pixel area, and a dummy area disposed on the outside of the display area; a protective layer disposed on the display area and the dummy area on the substrate; a first electrode disposed on an upper part of the protective layer of the pixel area; a bank including a first opening which is disposed on an upper part of the protective layer of the display area to cover an edge of the first electrode and exposes the first electrode; and a dummy pattern including a second opening which is disposed on an upper part of the protective layer of the dummy area and exposes the protective layer. The second opening has the width greater than the first opening.

Description

[0001] The present invention relates to an organic light emitting diode (OLED) display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting diode display device, and more particularly, to an organic light emitting diode display device capable of improving display quality by uniformly forming a thickness of an organic light emitting layer.

[0002] Currently, flat panel display devices such as plasma display panels (PDP), liquid crystal display devices (LCD), and organic light emitting diode display devices (OLEDs) are widely studied and used have.

Of the flat panel display devices as described above, the organic light emitting diode display device is a self-luminous device, and since it does not require a backlight used in a liquid crystal display device, it can be lightweight and thin.

In addition, it has superior viewing angle and contrast ratio compared with liquid crystal display devices, is advantageous in terms of power consumption, can be driven by DC low voltage, has a quick response speed, is resistant to external impacts due to its solid internal components, It has advantages.

Particularly, since the manufacturing process is simple, it is advantageous in that the production cost can be saved more than the conventional liquid crystal display device.

FIG. 1 is a plan view showing a conventional organic light emitting diode display, FIG. 2 (a) is a cross-sectional view taken along line IIa-IIa of FIG. 1, and FIG. 2b is a cross-sectional view taken along line IIb-IIb of FIG.

1, a conventional organic light emitting diode display device includes a substrate 11 including a display area AA including a plurality of pixel areas PA, And a bank 7 surrounding the respective pixel regions PA and arranged in the display region AA.

Specifically, as shown in FIGS. 2A and 2B, a protective layer 3 is disposed on a substrate 11, and a first electrode 5 is disposed in a pixel region PA above the protective layer 3 do.

The bank 7 covers the edge of the first electrode 5 and is disposed at the boundary of each pixel region PA above the protective layer 3. [

In addition, the first electrode 5 is made of a transparent conductive material having a relatively large work function value to serve as an anode electrode, and the bank 7 is made of an organic material, and the surface of the first electrode 5 is hydrophobic .

The organic light emitting layer 10 is disposed on the first electrode 5 of the pixel region P. The organic light emitting layer 10 is formed by a soluble process including an inkjet printing method and a nozzle printing method, do.

Hereinafter, a process of laminating the organic light emitting layer 10 by a soluble process will be described.

First, a solution of an organic light emitting material (not shown) is dropped onto the first electrode 5 of the pixel region PA. At this time, the spread of the organic light emitting material solution (not shown) The uniformity of the thickness of the organic light emitting layer 10 can be improved by spreading the organic light emitting material solution (not shown) uniformly throughout the pixel area PA.

The spread of the organic luminescent material solution (not shown) is determined by the boundary between the first electrode 5 and the pixel area PA disposed in the pixel area PA in contact with the dropping organic luminescent material solution (not shown) Is determined by the surface energy of the bank (7) disposed in the bank (7).

That is, the greater the surface energy of the surface in contact with the dropped organic luminescent material solution (not shown), the better the spreadability.

In this case, the surface energy of the surface in contact with the organic luminescent material solution (not shown) is compared with that of the top surface of the bank 7 (the first electrode 5 is the sidewall of the bank 7).

Accordingly, the upper surface of the bank 7 has the smallest surface energy, thereby serving as a barrier to prevent the organic light emitting material solutions (not shown) of the pixel regions PA from being mixed with each other.

When an organic light emitting material solution (not shown) is dropped on each pixel region PA, the pixel region PA located at the edge of the display region AA is different from the pixel region PA located in another region , And there is no other pixel area PA adjacent to one edge of the pixel area PA.

Accordingly, the pixel area PA located at the edge of the display area AA and the pixel area PA located at the other area are dropped to the pixel area PA located at the center of the display area AA, The evaporation environments of the solvent molecules of the organic light emitting material solution (not shown) are different.

2A, the evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel area PA located at the center of the display area AA is the same as that of the pixel area PA ), The organic light emitting layer 10 having a relatively uniform thickness is formed when the organic luminescent material solution (not shown) is dried.

2B, the evaporation environment of the solvent molecules of the organic light emitting material solution (not shown) dropped to the pixel area PA located at the edge of the display area AA is the pixel area PA, The organic light emitting layer 10 having an uneven thickness is formed when the organic luminescent material solution (not shown) is dried.

That is, since the evaporation speed of the solvent molecules at one edge of the pixel area PA is faster than that at the center, if the organic light emitting material solution (not shown) is dried, one edge of the pixel area PA is thicker than the remaining thickness including the center part The organic light emitting layer 10 is formed.

As described above, due to the uneven thickness of the organic light-emitting layer 10 formed in the pixel area PA located at the edge of the display area AA, uneven brightness is generated to deteriorate display quality of the organic light-emitting diode display device, Emitting efficiency and life of the light-emitting diode.

An object of the present invention is to provide an organic light emitting diode display device capable of improving the display quality by uniformly forming the thickness of the organic light emitting layer.

According to an aspect of the present invention, there is provided a liquid crystal display device including a substrate including a display region including a pixel region and a dummy region disposed outside the display region, a protection layer disposed in a display region and a dummy region on the substrate, A bank having a first electrode disposed on the protection layer of the dummy area and covering the first electrode edge on the protection layer of the display area and having a first opening exposing the first electrode; And a second opening exposing the protection layer, wherein the second opening has a greater width than the first opening.

Further, the second openings extend along the edge of the display region, or are divided into a plurality of portions along the edge of the display region.

The display device may further include a substrate including a display region including a pixel region and a dummy region disposed outside the display region, a first electrode disposed in a pixel region on the substrate, and a second electrode disposed in a display region and a dummy region A second bank disposed above the first bank of the display region and including a first bank edge and a first opening exposing the first electrode; a second bank disposed above the first bank of the dummy region, And a dummy pattern including a second opening exposing the bank, and the second opening has a width larger than that of the first opening.

The present invention improves the uniformity of the thickness of the organic light emitting layer formed in the pixel region located at the edge of the display region, thereby preventing the unevenness of the brightness, thereby preventing deterioration of the display quality of the organic light emitting diode display.

In addition, there is an effect that the luminous efficiency and the lifetime of the organic light emitting diode included in the organic light emitting diode display device can be prevented.

1 is a plan view showing a conventional organic light emitting diode display device.
FIG. 2A is a cross-sectional view taken along line IIa-IIa of FIG. 1, and FIG. 2B is a cross-sectional view taken along line IIb-IIb of FIG.
3 is a plan view of an organic light emitting diode display device according to a first embodiment of the present invention.
4A is a cross-sectional view taken along line IVa-IVa in FIG. 3, and FIG. 4B is a cross-sectional view taken along line IVB-IVB in FIG.
5 is a cross-sectional view taken along line V-V in Fig.
6 is a plan view of an organic light emitting diode display device according to a second embodiment of the present invention.
FIG. 7A is a cross-sectional view taken along line VIIa-VIIa of FIG. 6, and FIG. 7B is a cross-sectional view taken along line VIIb-VIIb of FIG.
8 is a cross-sectional view taken along line VIII-VIII of FIG.

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

&Lt; Embodiment 1 >

FIG. 3 is a plan view of the organic light emitting diode display according to the first embodiment of the present invention, FIG. 4A is a sectional view taken along line IVa-IVa in FIG. 3, And Fig. 5 is a cross-sectional view taken along line V-V in Fig.

3, the organic light emitting diode display device according to the first embodiment of the present invention includes a display area AA including a plurality of pixel areas PA and a display area AA disposed outside the display area AA, A first electrode 105 arranged on each pixel area PA on the substrate 101 and a first electrode 105 exposed on the substrate 101, A bank 107a surrounding the pixel area PA and including a first opening 140 and disposed in the display area AA and a second opening 150 exposing the protective layer 103, And a dummy pattern 107b disposed in the dummy area DA.

Specifically, as shown in Figs. 4A, 4B, and 5, the protective layer 103 is disposed on the display area AA and the dummy area DA on the substrate 101, A first electrode 105 is disposed in each pixel region PA.

The first electrode 105 may be made of a transparent conductive material such as indium-tin-oxide (ITO) or indium-tin-oxide - zinc-oxide (IZO), and the like.

The bank 107a includes a first opening 140 for exposing the first electrode 105 and covers the edge of the first electrode 105 to surround the pixel region PA, The dummy pattern 107b is disposed on the protective layer 103 and includes a second opening 150 exposing the protective layer 103 and extends from the bank 107a located at the edge of the display area AA, Is disposed on the protective layer 103 of the dielectric layer DA.

3, the second openings 150 may be extended along the edge of the display area AA, unlike the drawing, may be divided into a plurality of sections along the edge of the display area AA have.

The second openings 150 may be formed to have a width larger than the width of the first openings 140 and may have a same shape and the same area as the first openings 140.

The bank 107a and the dummy pattern 107b are simultaneously formed through a single mask process and are formed of a material such as polyacryl, And the like.

In addition, the upper surface of the bank 107a and the dummy pattern 107b become hydrophobic through surface treatment.

The organic light emitting layer 110a is disposed on the first electrode 105 and the dummy organic light emitting layer 110b is disposed on the protective layer 103 exposed by the second opening 150, Not shown) is disposed on the organic light emitting layer 110a.

The organic light emitting layer 110a and the dummy organic light emitting layer 110b are laminated by a soluble process including an inkjet printing method and a nozzle printing method.

Hereinafter, a process of laminating the organic light emitting layer 110a and the dummy organic light emitting layer 110b in a soluble process will be described.

First, the organic luminescent material solution (not shown) is exposed by the first opening 105 of the display area AA and the second opening 150 of the dummy area DA exposed by the first opening 140 of the display area AA. On the protective layer 103, respectively.

At this time, as the spreading property of the dropped organic luminescent material (not shown) increases, the organic luminescent material solution (not shown) spreads evenly throughout the pixel areas PA of the display area AA, Can be improved.

The spreading property of the organic light emitting material solution (not shown) is determined by the first electrode 105 exposed by the first opening portion 140 in contact with the dropping organic light emitting material solution (not shown) The dummy patterns 107b disposed in the dummy area DA and the surface energy of the protective layer 103 exposed by the second openings 150. [

At this time, the greater the surface energy of the surface contacting the dropping organic luminescent material solution (not shown), the better the spreadability. Comparing the surface energy of the surface in contact with the organic luminescent material solution The upper surface of the bank 107a and the upper surface of the dummy pattern 107b are in the order of the first electrode 105 and the side walls of the bank 107a and the dummy pattern 107b.

Thus, the upper surface of the bank 107a has the smallest surface energy, thereby serving as a barrier to prevent the organic light emitting material solutions (not shown) of the pixel regions PA from being mixed with each other.

The protective layer 103 has the greatest surface energy so that the organic luminescent material solution (not shown) dropped on the protective layer 103 exposed by the second opening portion 150 of the dummy region DA Is better than the organic light emitting material solution (not shown) dropped on the first electrode 105 exposed by the first opening 140 of the pixel area PA.

That is, since the protective layer 103 is made of an inorganic or organic material having hydrophilicity, the organic light emitting material solution (not shown) is uniformly spread over the protective layer 103 exposed by the second opening 150 .

At this time, due to the organic luminescent material solution (not shown) dropped on the protective layer 103 exposed by the second opening portion 150 of the dummy region DA, The evaporation environment of the solvent molecules of the organic light emitting material solution (not shown) dropped in the pixel region PA located at the center of the display region AA (Not shown) of the organic luminescent material solution (PA) dropping the solvent molecules.

4A, the evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel area PA located at the center of the display area AA is controlled by the pixel area PA The organic light emitting layer 110a having a relatively uniform thickness is formed when the organic light emitting material solution (not shown) is dried.

4B, the evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel area PA located at the edge of the display area AA is determined by the dummy area DA (Not shown) located at the second opening 150 of the pixel region PA, the organic luminescent material solution (not shown) is formed at the periphery of the pixel region PA, When dried, an organic light emitting layer 110a having a relatively uniform thickness is formed.

The evaporation environment of the organic luminescent material solution (not shown) located in the second opening 150 of the dummy area DA is different from that of the second opening 150 of the dummy area DA, When the organic luminescent material solution (not shown) dropped on the second opening portion 150 of the dummy region DA is dried, as shown in Fig. 5, the uneven dummy organic luminescent layer 110b may be removed, However, even if the dummy organic light emitting layer 110b is formed with a non-uniform thickness, the dummy organic light emitting layer 110b does not emit light, so that the display quality is not affected.

By uniformly forming the thickness of the organic light emitting layer 110a formed in the pixel area PA located at the edge of the display area AA as described above, it is possible to prevent unevenness in brightness and to prevent display quality deterioration of the organic light emitting diode display device In addition, it is possible to prevent deterioration in luminous efficiency and lifetime of the organic light emitting diode.

On the other hand, in order to realize a high-resolution organic light emitting diode display device, the number of pixels per unit area of the display area AA must be increased, and accordingly, the width of the bank 107a for partitioning each pixel area PA must be reduced.

At this time, in the case of the pixel area PA located at the center of the display area AA, there are a first pixel area adjacent to the first pixel area and a second pixel area adjacent to the first pixel area, An organic light emitting material solution (not shown) dropped onto the pixel region PA located in the central portion of the display region AA is affected by the evaporation environment of the organic light emitting material solution (not shown) You can give.

Accordingly, in order to make the evaporation environment of the organic light emitting material solution (not shown) dropping in the pixel area PA located at the edge of the display area AA more similar to the remaining pixel area PA, The width of the opening 150 should be wide or the second openings 150 should be arranged in parallel along the edge of the display area AA.

Particularly, when the second opening portion 150 is divided and arranged, the spread of the organic light emitting material solution (not shown) is lowered by the dummy pattern 107b dividing the second opening portion 150, The number of the second openings 150 should be arranged in parallel along the edge of the display area AA.

As a result, the width of the dummy area DA is increased, making it impossible to implement a narrow bezel.

Therefore, the second openings 150 of the dummy area DA are extended along the edge of the display area AA and the width of the second openings 150 is larger than the width of the pixel area PA desirable.

&Lt; Embodiment 2 >

FIG. 6 is a plan view of an OLED display according to a second embodiment of the present invention, FIG. 7A is a cross-sectional view taken along VIIa-VIIa of FIG. 6, and FIG. 7b is a cross-sectional view taken along VIIb- And Fig. 8 is a cross-sectional view taken along VIII-VIII of Fig.

6, the organic light emitting diode display device according to the second embodiment of the present invention includes a display area AA including a plurality of pixel areas PA and a display area AA disposed outside the display area AA, A substrate 201 including a dummy area DA surrounding the pixel area AA, a first electrode 205 arranged in each pixel area PA on the substrate 201, First banks 207a and 207b disposed in the display area AA and the dummy area DA and first and second banks 207a and 207b disposed on the first bank 207a in the display area AA, A second bank 209a including a first opening 240 for exposing the first electrode 205 and a second bank 209b disposed above the first bank 207b of the dummy area DA to expose the first bank 207b And a dummy pattern 209b including a second opening portion 250 for providing a second opening.

7A, 7B, and 8, the first electrode 205 is disposed in each pixel region PA of the display region AA on the substrate 201, and the first electrode 205 ) May be made of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO).

The first banks 207a and 207b cover the edge of the first electrode 205 and surround the pixel area PA and are disposed in the display area AA and the dummy area DA.

The second bank 209a is disposed above the first bank 207a of the display area AA and includes a first opening 240 for exposing the edge of the first bank 207a and the first electrode 205 And a dummy pattern 209b is disposed on the first bank 207b of the dummy area DA and includes a second opening 250 exposing the first bank 207b.

At this time, the second bank 209a and the dummy pattern 209b are simultaneously formed through a single mask process.

The first banks 207a and 207b may be made of an inorganic material such as SiO2 and SiNx having hydrophilic properties and the second bank 209a and the second dummy pattern 209b may be made of an inorganic material such as polyacryl, polyimide, polyamide (PA), benzocyclobutene (BCB), and phenolic resin.

In addition, the upper surface of the second bank 209a and the second dummy pattern 209b become hydrophobic through surface treatment.

6, the second openings 250 may extend along the edge of the display area AA, and unlike the figure, the second openings 250 may be divided into a plurality of sections along the edge of the display area AA have.

The second openings 250 may be formed to have a width larger than the width of the first openings 240 and may have the same shape and the same area as the first openings 240.

The organic light emitting layer 210a is disposed on the first electrode 205 and the dummy organic light emitting layer 210b is disposed on the first bank 207b exposed by the second opening 250, (Not shown) is disposed on the organic light emitting layer 210a.

The organic light emitting layer 210a and the dummy organic light emitting layer 210b are laminated by a soluble process including an inkjet printing method and a nozzle printing method.

Hereinafter, a process of laminating the organic light emitting layer 210a and the dummy organic light emitting layer 210b in a soluble process will be described.

First, an organic light emitting material solution (not shown) is exposed on the first electrode 205 exposed by the first opening 240 of the display area AA and by the second opening 250 of the dummy area DA Respectively, on the first bank 207b.

At this time, as the spread of the dropped organic luminescent material solution (not shown) increases, the organic luminescent material solution (not shown) spreads evenly throughout the pixel areas PA of the display area AA, Can be improved.

The spread of the organic luminescent material solution (not shown) is controlled by the first electrode 205 exposed by the first opening portion 240 of the pixel region PA in contact with the dropping organic luminescent material solution (not shown) The first and second banks 207a and 209a disposed at the boundary of the pixel area PA and the surface energy of the first bank and the dummy patterns 207b and 209b disposed in the dummy area DA do.

At this time, the greater the surface energy of the surface contacting the dropping organic luminescent material solution (not shown), the better the spreadability. Comparing the surface energy of the surface in contact with the organic luminescent material solution The side walls of the second bank 209a and the second dummy pattern 209b are formed on the upper surface of the second bank 209a and the second dummy pattern 209b in the first bank 207a, 207b).

Thus, the upper surface of the second bank 209a has the smallest surface energy, thereby functioning as a barrier to prevent the organic light emitting material solutions (not shown) of the pixel regions PA from being mixed with each other.

Since the first bank 207a of the display area AA has the largest surface energy, the edge of the organic light emitting layer 210a is relieved from being curled up to the side wall of the second bank 209a during the drying process, The thickness uniformity of the light emitting layer 210a can be improved.

The first bank 207b of the dummy area DA has the largest surface energy so that the first bank 207b exposed by the second opening 250 of the dummy area DA is dropped on the first bank 207b. The spread of the organic luminescent material solution (not shown) is performed by dropping an organic luminescent material solution (not shown) on the first electrode 205 exposed by the first opening portion 240 of the pixel region PA ).

That is, since the first bank 207b of the dummy area DA is made of an inorganic material having hydrophilicity, an organic light emitting material solution (not shown) is formed on the first bank 207b exposed by the second opening part 250 ) Is spread evenly.

At this time, due to the organic light emitting material solution (not shown) dropped on the first bank 207b exposed by the second opening portion 250 of the dummy region DA, The evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel region PA positioned at the pixel region PA located at the center portion of the display region AA, Is similar to the evaporation environment of the solvent molecules of the organic light emitting material solution (not shown) dropped in the region PA.

7A, the evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel area PA located at the center of the display area AA is the same as that of the pixel area PA The organic light emitting layer 210a having a relatively uniform thickness is formed when the organic light emitting material solution (not shown) is dried.

7B, the evaporation environment of the solvent molecules of the organic luminescent material solution (not shown) dropped in the pixel area PA located at the edge of the display area AA is set to the dummy area DA The organic luminescent material solution (not shown) becomes similar to the organic luminescent material solution (not shown) due to the organic luminescent material solution (not shown) located at the second opening portion 250 of the pixel region PA, When dried, an organic light emitting layer 210a having a relatively uniform thickness is formed.

The evaporation environment of the organic light emitting material solution (not shown) located in the second opening part 250 of the dummy area DA is different from that of the second opening part 250 of the dummy area DA, The organic luminescent material solution (not shown) dropped in the second openings 250 of the dummy area DA is dried to form a non-uniform dummy organic luminescent layer 210b, as shown in FIG. 8, However, even if the dummy organic light emitting layer 210b is formed to have a non-uniform thickness, the dummy organic light emitting layer 210b does not emit light, so that display quality is not affected.

By uniformly forming the thickness of the organic light emitting layer 210a formed in the pixel area PA located at the edge of the display area AA as described above, it is possible to prevent unevenness in brightness and to prevent display quality deterioration of the organic light emitting diode display device In addition, it is possible to prevent deterioration in luminous efficiency and lifetime of the organic light emitting diode.

In order to realize a high-resolution organic light emitting diode display device, the number of pixels per unit area of the display area AA must be increased. Accordingly, the number of pixels of the first and second banks 207a and 209a We must also reduce the width.

Accordingly, in order to make the evaporation environment of the organic light emitting material solution (not shown) dropping in the pixel area PA located at the edge of the display area AA more similar to the remaining pixel area PA, The width of the opening 250 should be increased or the second openings 250 should be arranged in parallel along the edge of the display area AA.

Particularly, when the second opening portion 250 is divided and arranged, the spread of the organic luminescent material solution (not shown) is lowered by the dummy pattern 209b dividing the second opening portion 250, The number of the second openings 250 should be arranged in parallel along the edge of the display area AA.

Therefore, the second openings 250 of the dummy area DA are extended along the edge of the display area AA and the width of the second openings 250 is larger than the width of the pixel area PA desirable.

The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit of the present invention.

101: substrate
103: Protective layer
105: first electrode
107a: bank
107b: dummy pattern
140, 150: first and second openings

Claims

A substrate including a display region including a pixel region and a dummy region disposed outside the display region;
A protective layer disposed on the display region and the dummy region on the substrate;
A first electrode disposed on a protective layer of each of the pixel regions;
A bank that covers the first electrode edge on the protection layer of the display region and includes a first opening exposing the first electrode;
And a dummy pattern made of the same material as the bank and including a second opening disposed on the protection layer of the dummy region and exposing the protection layer,
The second opening has a greater width than the first opening,
Wherein each of the bank and the dummy pattern has an upper surface hydrophobic, and the protective layer has hydrophilic
Organic light emitting diode display.

The method according to claim 1,
And the second openings extend along the edge of the display region.

The method according to claim 1,
And the second openings are divided into a plurality of portions along the edge of the display region.

The method according to claim 1,
An organic light emitting layer disposed on the first electrode;
A dummy organic light emitting layer disposed on the protective layer exposed by the second opening; And
And a second electrode
And an organic light emitting diode (OLED) display device.

5. The method of claim 4,
Wherein the protective layer is made of an inorganic material.

A substrate including a display region including a pixel region and a dummy region disposed outside the display region;
A first electrode disposed in each of the pixel regions on the substrate;
A first bank covering the first electrode edge and disposed in the display region and the dummy region;
A second bank disposed above the first bank of the display region and including a first opening for exposing the first bank edge and the first electrode;
And a dummy pattern made of the same material as the second bank and including a second opening disposed above the first bank of the dummy region and exposing the first bank,
The second opening has a greater width than the first opening,
Each of the second bank and the dummy pattern has an upper surface hydrophobic, and the first bank has hydrophilic
Organic light emitting diode display.

The method according to claim 6,
And the second openings extend along the edge of the display region.

The method according to claim 6,
And the second openings are divided into a plurality of portions along the edge of the display region.

The method according to claim 6,
An organic light emitting layer disposed on the first electrode;
A dummy organic light emitting layer disposed above the first bank exposed by the second opening; And
And a second electrode
And an organic light emitting diode (OLED) display device.

10. The method of claim 9,
Wherein the first bank is made of an inorganic material, and the second bank and the dummy pattern are made of an organic material.