KR20170080288A - Organic light emitting diode display device - Google Patents

Abstract

The present invention provides an organic light emitting diode display device capable of improving display quality by forming a thickness of an organic light emitting layer to a target thickness. The organic light emitting diode display device includes a substrate including a pixel region, a first electrode disposed in a pixel region on the substrate, A first bank which covers the first electrode edge and is disposed at a boundary of the pixel region on the substrate and a second bank which is connected to the first bank central portion located in the minor axis direction or the major axis direction of the pixel region, And an organic light emitting layer disposed over the first electrode.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] 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 forming a thickness of an organic light emitting layer to a target thickness.

2. Description of the Related Art Currently, flat panel display devices such as plasma display panels (PDP), liquid crystal display devices (LCD), and organic light emitting diode display devices (OLED) 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, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, illustrating a process of depositing an organic light emitting layer in a pixel region by a solution process.

More specifically, FIG. 2 (a) is a view showing a dropping process during a solution process, and FIG. 2 (b) is a view showing a state in which an organic light emitting layer is laminated after a solution process.

As shown in the figure, a conventional organic light emitting diode display device includes a plurality of pixel regions P1 to P3, a plurality of pixel regions P1 to P3, a plurality of pixel regions P1 to P3, (7).

Specifically, the first electrode 5 is disposed in each of the pixel regions P1 to P3 on the substrate 11.

The bank 7 covers the edge of the first electrode 5 and is disposed at the boundary between the pixel regions P1 to P3 on the substrate 11. [

The organic light emitting layer 10 is disposed on the first electrodes 5 of the pixel regions P1 to P3 and may be formed by a solution process such as an inkjet printing method or a nozzle printing method, ).

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

The organic light emitting material solution 9 is dropped onto the first electrodes 5 of the pixel regions P1 to P3 as shown in FIG. The uniformity of the organic light emitting layer 10 can be improved by spreading the organic light emitting material solution 9 uniformly throughout the pixel regions P1 to P3 as the spreadability of the organic light emitting material solution 9 is increased.

The spreadability of the organic luminescent material solution 9 is determined by the surface tension of the organic luminescent material solution 9 and the surface tension of the organic luminescent material solution 9 placed in each pixel region P1 to P3 in contact with the dropping organic luminescent material solution 9. [ Is determined by the surface energy of the bank 7 disposed at the boundary between the first electrode 5 and each pixel region P1 to P3.

That is, as the surface tension of the organic luminescent material solution 9 is smaller, the spreadability of the organic luminescent material solution 9 is improved. As the surface energy of the surface contacting the dropping organic luminescent material solution 9 is larger, Spreadability is improved.

On the other hand, since the organic luminescent material solution 9 having a small surface tension is unevenly dried in the drying process to lower the uniformity of the thickness of the organic luminescent layer 10, the organic luminescent material solution 9 having a relatively large surface tension 9) is used.

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 .

In this case, the surface energy of the surface in contact with the organic luminescent material solution 9 is compared with that of the top surface of the bank 7 (the first electrode 5 <the side wall 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 9 of the pixel regions P1 to P3 from being mixed with each other.

2 (a), since the sidewall of the bank 7 has a higher surface energy than the first electrode 5, the upper surface of the first electrode 5 of each pixel region P1 to P3 The organic light emitting material solution 9 dropped to the side wall of the bank 7 is biased.

On the other hand, if the dropping amount of the organic luminescent material solution 9 that is dropped to the first electrode 5 of each of the pixel regions P1 to P3 And the number of drops of the organic luminescent material solution 9 for forming the thickness of the target organic luminescent layer 10 is referred to as a target thickness drop number.

At this time, the dropped organic light emitting material solution 9 has a convex shape due to the relatively high surface tension, and the dropped organic light emitting material solution 9 flows into the side wall of the bank 7 The minimum number of drops may be larger than the target thickness drop number.

Accordingly, as shown in FIG. 2 (b), the thickness of the organic light emitting layer 10 formed after the drying process becomes larger than the target thickness T, and the display quality of the organic light emitting diode display device is deteriorated .

Particularly, this problem is caused by the fact that as the area of each of the pixel regions P1 to P3 is increased, the distance between the organic light emitting material solutions 9 dropped on the first electrode 5 of each of the pixel regions P1 to P3 Lt; RTI ID = 0.0 &gt; greater. &Lt; / RTI &gt;

SUMMARY OF THE INVENTION It is an object of the present invention to provide an organic light emitting diode display device having improved display quality by forming a thickness of an organic light emitting layer to a target thickness.

According to an aspect of the present invention, there is provided a display device including a substrate including a pixel region, a first electrode arranged in a pixel region on the substrate, a first electrode covering the first electrode edge, An organic light emitting diode (OLED) including a first bank, a second bank disposed above the first electrode, and an organic light emitting layer disposed over the first electrode, the first bank being connected to the first bank central portion in the short axis direction or the major axis direction of the pixel region, A display device is provided.

Further, the pixel region includes first to third pixel regions arranged in a horizontal direction, each of which displays a different color, and the second bank is disposed in at least one of the first to third pixel regions.

At this time, the third pixel region is larger than the first and second pixel regions, and the second bank is disposed in the third pixel region.

The second bank has a width smaller than that of the first bank disposed at each of the first to third pixel region boundaries, and the first and second banks have the same material and the same height.

The present invention prevents the solution of the organic light emitting material dropped during the soluble process from being biased toward the bank, thereby improving the display quality of the organic light emitting diode display by forming the thickness of the organic light emitting layer to a target thickness There is an effect.

1 is a plan view showing a conventional organic light emitting diode display device.
2 is a cross-sectional view taken along the line II-II in FIG.
3 is a plan view of an organic light emitting diode display device according to a first embodiment of the present invention.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a plan view of an organic light emitting diode display device according to a second embodiment of the present invention.
FIG. 6A is a cross-sectional view taken along line VIa-VIa of FIG. 5, and FIG. 6B is a cross-sectional view taken along line VIb-VIb of FIG.
7 is a plan view of an organic light emitting diode display device according to a third embodiment of the present invention.
FIG. 8A is a cross-sectional view taken along VIIIa-VIIIa of FIG. 7, and FIG. 8B is a cross-sectional view taken along VIIIb-VIIIb 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, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. Fig.

More specifically, FIG. 4 (a) is a view showing a dropping process in a solution process, and FIG. 4 (b) is a view showing a state in which an organic light emitting layer is laminated after a solution process.

The organic light emitting diode display device according to the first embodiment of the present invention includes a substrate 101 including a plurality of pixel regions P1 to P3, A first bank 107 arranged to surround each of the pixel regions P1 to P3 and partitioning the pixel regions P1 to P3; And a second bank 108 disposed on top of the second bank 108.

Hereinafter, the pixel regions P1 to P3 are arranged in the horizontal direction to display different colors, respectively.

Specifically, the first bank 107 is disposed on the substrate 101 so as to cover the edge of the first electrode 105, and the second bank 108 is disposed on the substrate 101 in the direction of the short axis of each of the pixel regions P1 to P3. One bank 107 is connected to a central portion of the first electrode 105 and is disposed above the first electrode 105.

The second bank 108 may be disposed on the first electrode 105 connecting the central portion of the first bank 107 located in the major axis direction of each of the pixel regions P1 to P3.

Thus, each pixel region P1 to P3 is divided by the second bank 108. [

In addition, the first and second banks 107 and 108 may be formed of the same material and may have the same height by being formed together.

Further, since the second banks 108 are formed together when the first bank 107 is formed, the manufacturing process can be simplified and the manufacturing cost can be reduced.

The second bank 108 is disposed at the center of each of the pixel regions P1 to P3 to lower the aperture ratio of the pixel regions P1 to P3. In order to minimize the aperture ratio, the width of the second bank 108 must be minimized do.

The second bank 108 is preferably formed to have a smaller width than the first bank 107 disposed at the boundary between the pixel regions P1 to P3. It is preferable to arrange them along the shorter axis direction.

The first bank 107 serves to confine the organic luminescent material solution 109 in each of the pixel regions P1 to P3 and the second bank 108 serves to confine the organic luminescent material 109 in the pixel regions P1 to P3. And improves the spreadability of the material solution (not shown).

In this case, the first and second banks 107 and 108 may be formed of an organic material such as polyacryl, polyimide, polyamide (PA), benzocyclobutene (BCB) and phenol resin , The upper surface thereof through hydrophobic treatment has hydrophobicity and the side wall thereof may have hydrophilic property.

The organic light emitting layer 110 is disposed on the first electrode 105 and the second electrode (not shown) is disposed on the organic light emitting layer 110.

On the other hand, the organic light emitting layer 110 is laminated by a soluble process such as an inkjet printing method or a nozzle printing method.

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

First, as shown in FIG. 4A, the organic light emitting material solution 109 is dropped onto the first electrode 105 of the pixel region P1.

At this time, as the spreading property of the dropping organic light emitting material solution 109 is increased, the organic light emitting material solution 109 spreads evenly throughout the pixel region P1 to reduce the thickness uniformity of the organic light emitting layer 110 Can be improved.

The spreading property of the organic luminescent material solution 109 is determined by the surface tension of the organic luminescent material solution 109 and the surface tension of the first electrode 102 disposed in the pixel region P1 contacting the dropping organic luminescent material solution 109. [ Is determined by the surface energy of the first bank 107 disposed at the boundary of the pixel region P1 and the surface energy of the second bank 108 disposed at the center of the pixel region P1.

That is, the smaller the surface tension of the organic luminescent material solution 109 is, the better the spread of the organic luminescent material solution 109 is. As the surface energy of the surface contacting the dropped organic luminescent material solution 109 becomes larger Spreadability is improved.

On the other hand, since the organic luminescent material solution 109 having a small surface tension is unevenly dried in the drying process to lower the uniformity of the thickness of the organic luminescent layer 110, the organic luminescent material solution 109 having a relatively large surface tension 109) is used.

When the surface energy of the surface in contact with the organic luminescent material solution 109 is compared, the upper surface of the first and second banks 107 and 108 (the first electrode 105, the first and second banks 107, and 108, respectively.

The upper surface of the first bank 107 disposed at the boundary between the pixel regions P1 to P3 has the smallest surface energy and the organic light emitting material solution 109 in each of the pixel regions P1 to P3, Are mixed with each other.

On the other hand, when the drop amount of the organic light emitting material solution 109, which is the minimum amount of the dropping organic light emitting material solution 109 spread over the first electrode 105 of the pixel region P1, and the number of drops of the organic luminescent material solution 109 for forming the thickness of the target organic luminescent layer 110 is referred to as the target thickness drop number.

At this time, since the side wall of the second bank 108 disposed at the center of the pixel region P1 has the smallest surface energy similarly to the side wall of the first bank 107, both side walls of the second bank 108 are divided into the divided pixel regions The organic light emitting material solution 109 dropped on the first bank 107 is prevented from being biased toward both side walls of the first bank 107 located in the major axis direction or the minor axis direction of the pixel region P1.

That is, by improving the spreadability of the organic light emitting material solution 109 in which the second bank 108 is dropped, it is possible to prevent the minimum drop number from becoming larger than the target thickness drop number.

Accordingly, as shown in FIG. 4 (b), after the drying process, the thickness of the organic light emitting layer 110 may be set to the target thickness T to improve the display quality of the organic light emitting diode display.

&Lt; Embodiment 2 >

FIG. 5 is a plan view of an OLED display according to a second embodiment of the present invention. FIG. 6A is a cross-sectional view taken along line VIa-VIa in FIG. 5, and FIG. 6B is a cross-sectional view taken along line VIb- Sectional view.

As shown in the drawing, an organic light emitting diode display device according to a second embodiment of the present invention includes a substrate 201 including first to third pixel regions P1 to P3, A first bank 205 which is arranged in the regions P1 to P3 and a first bank 207 which surrounds the pixel regions P1 to P3 and surrounds the pixel regions P1 to P3, And a second bank 208 disposed above the first electrode 205.

Hereinafter, the first to third pixel regions P1 to P3 are arranged in the horizontal direction, each displaying a different color.

Specifically, the first bank 207 is disposed on the substrate 201 so as to cover the edge of the first electrode 205, and the second bank 208 is disposed on the first pixel 205, And is disposed above the first electrode 205 of the third pixel region P3.

Also, unlike the drawing, the second bank 208 may be disposed in the first or second pixel region P1 or P2, and one or more of the first to third pixel regions P1 to P3 may be disposed .

On the other hand, in the case of the pixel region in which the organic light emitting diode having the low luminous efficiency is arranged among the pixel regions P1 to P3, the area of the pixel region is wider than the other pixel regions in order to improve the luminous efficiency, The spread of the organic light emitting material solution (not shown) may be lowered.

Accordingly, it is preferable that the second bank 208 is arranged in a pixel region having a relatively large area.

As described above, since the third pixel region P3 has a larger area than the first and second pixel regions P1 and P2, the second bank 208 is disposed in the third pixel region P3, The pixel regions P1 to P3 are divided by the second bank 208. [

In addition, the first and second banks 207 and 208 may be formed of the same material, and may have the same height.

Further, since the second bank 208 is formed at the time of forming the first bank 207, the manufacturing process can be simplified and the manufacturing cost can be reduced.

The second bank 208 is disposed at the center of the third pixel region P3 to reduce the aperture ratio of the third pixel region P3. In order to minimize the aperture ratio of the third pixel region P3, the width of the second bank 208 must be minimized.

For this, the second bank 208 is preferably formed to have a smaller width than the first bank 207 disposed at the boundary of each pixel region P1 to P3.

The first bank 207 serves to confine an organic light emitting material solution (not shown) in each pixel region P1 to P3 and the second bank 208 serves to confine an organic light emitting material And improves the spreadability of the material solution (not shown).

At this time, the first and second banks 207 and 208 may be formed of an organic material such as polyacryl, polyimide, polyamide (PA), benzocyclobutene (BCB) and phenol resin , The upper surface thereof through hydrophobic treatment has hydrophobicity and the side wall thereof may have hydrophilic property.

The organic light emitting layer 210 is disposed on the first electrode 205 and the second electrode (not shown) is disposed on the organic light emitting layer 210.

Meanwhile, the organic light emitting layer 210 is laminated by a soluble process such as an inkjet printing method or a nozzle printing method.

Hereinafter, a process of laminating the organic light emitting layer 210 by a soluble process will be described.

First, an organic light emitting material solution (not shown) is dropped onto the first electrode 205 of each pixel region P1 to P3.

At this time, as the spread of the dropped organic luminescent material solution (not shown) increases, the organic luminescent material solution (not shown) uniformly spreads throughout the pixel regions P1 to P3, The uniformity can be improved.

The spreading property of the organic light emitting material solution (not shown) depends on the surface tension of the organic light emitting material solution (not shown) and the pixel areas P1 to P3 in contact with the dropping organic light emitting material solution (not shown) A first bank 207 disposed at a boundary between the pixel regions P1 and P3 and a second bank 208 disposed at a central portion of the third pixel region P3. It is determined by energy.

That is, the smaller the surface tension of the organic luminescent material solution (not shown), the better the spreadability of the organic luminescent material solution (not shown) and the better the surface of the surface in contact with the dropping organic luminescent material solution The larger the energy, the better the spreadability.

On the other hand, since the organic luminescent material solution (not shown) having a small surface tension is unevenly dried during the drying process to lower the uniformity of the thickness of the organic luminescent layer 210, the organic luminescent material solution (Not shown).

In addition, when the surface energy of the surface contacting the organic luminescent material solution (not shown) is compared, the upper surface of the first and second banks 207 and 208 (the first electrode 205, the first and second banks 205, (207, 208).

As described above, the upper surface of the first bank 207 disposed at the boundary between the pixel regions P1 to P3 has the smallest surface energy, so that the organic light emitting material solution (not shown) of each pixel region P1 to P3 ) From mixing with each other.

On the other hand, the drop of the organic light emitting material solution (not shown) in which the dropping organic light emitting material solution (not shown) is spread over the first electrode 205 of each pixel region P1 to P3 as a whole And the number of drops of the organic luminescent material solution (not shown) for forming the thickness of the target organic luminescent layer 210 is referred to as the target thickness drop number.

At this time, since the side wall of the second bank 208 disposed at the center of the third pixel region P3 has the smallest surface energy as the side wall of the first bank 207, both side walls of the second bank 208 are divided The organic electroluminescent material solution (not shown) dropped in the third pixel region P3 is prevented from being biased toward both side walls of the first bank 207 located in the major axis direction of the third pixel region P3 .

That is, by improving the spreadability of the organic light emitting material solution (not shown) in which the second bank 208 is dropped, it is possible to prevent the minimum drop number from becoming larger than the target thickness drop number.

Accordingly, as shown in FIG. 6B, after the drying process, the thickness of the organic light emitting layer 210 may be set to the target thickness T to improve the display quality of the organic light emitting diode display.

6A, since the first pixel region P1 has an area smaller than that of the third pixel region P3, even if the second bank 208 is not disposed in the first pixel region P1 The spread of the organic light emitting material solution (not shown) dropped on the first electrode 205 of the first pixel region P1 may not be lowered.

Accordingly, the organic light emitting layer 210 having the target thickness T may be formed after the drying process. This also applies to the second pixel region P2.

&Lt; Third Embodiment >

FIG. 7 is a plan view of an OLED display according to a third embodiment of the present invention, FIG. 8A is a cross-sectional view taken along VIIIa-VIIIa of FIG. 7, and FIG. 8B is a cross-sectional view taken along VIIIb- Sectional view.

3, the organic light emitting diode display device according to the third embodiment of the present invention includes a substrate 301 including first through third pixel regions P1 through P3, A first bank 307 arranged to surround each of the pixel regions P1 to P3 and partitioning the pixel regions P1 to P3; And a second bank 308 disposed on the first electrode 305. [

Hereinafter, the first to third pixel regions P1 to P3 are arranged in the horizontal direction, each displaying a different color.

Specifically, the first bank 307 covers the edge of the first electrode 305 and is disposed on the substrate 301, and the second bank 308 is disposed on the first pixel region P3, And is disposed above the first electrode 305 of the third pixel region P3, connecting the central portion of the bank 307. [

Also, unlike the drawing, the second bank 308 may be disposed in the first or second pixel region P1 or P2, and one or more of the first to third pixel regions P1 to P3 may be disposed .

On the other hand, in the case of the pixel region in which the organic light emitting diode having the low luminous efficiency is arranged among the pixel regions P1 to P3, the area of the pixel region is wider than the other pixel regions in order to improve the luminous efficiency, The spread of the organic light emitting material solution (not shown) may be lowered.

Accordingly, it is preferable that the second bank 308 is arranged in a pixel area having a relatively large area.

Since the third pixel region P3 has a larger area than the first and second pixel regions P1 and P2 as described above, the second bank 308 is disposed in the third pixel region P3, The pixel regions P1 to P3 are divided by the second bank 308. [

In addition, the first and second banks 307 and 308 may be formed of the same material and may have the same height.

Further, since the second bank 308 is formed at the time of forming the first bank 307, the manufacturing process can be simplified and the manufacturing cost can be reduced.

The second bank 308 is disposed at the center of the third pixel region P3 to reduce the aperture ratio of the third pixel region P3. In order to minimize the aperture ratio of the third pixel region P3, the width of the second bank 308 must be minimized.

For this, the second bank 308 is preferably formed to have a width smaller than that of the first bank 307 disposed at the boundary between the pixel regions P1 to P3.

The first bank 307 functions to confine an organic light emitting material solution (not shown) in each of the pixel regions P1 to P3 and the second bank 308 functions to confine an organic light emitting material And improves the spreadability of the material solution (not shown).

The first and second banks 307 and 308 may be formed of an organic material such as polyacryl, polyimide, polyamide (PA), benzocyclobutene (BCB), and phenol resin , The upper surface thereof through hydrophobic treatment has hydrophobicity and the side wall thereof may have hydrophilic property.

The organic light emitting layer 310 is disposed on the first electrode 305 and the second electrode (not shown) is disposed on the organic light emitting layer 310.

Meanwhile, the organic light emitting layer 310 is laminated by a soluble process such as an inkjet printing method or a nozzle printing method.

Hereinafter, a process of laminating the organic light emitting layer 310 in a soluble process will be described.

First, an organic light emitting material solution (not shown) is dropped onto the first electrode 305 of each of the pixel regions P1 to P3.

At this time, as the spreadability of the dropped organic luminescent material solution (not shown) increases, the organic luminescent material solution (not shown) uniformly spreads throughout the pixel regions P1 to P3, The uniformity can be improved.

The spreading property of the organic light emitting material solution (not shown) depends on the surface tension of the organic light emitting material solution (not shown) and the pixel areas P1 to P3 in contact with the dropping organic light emitting material solution (not shown) A first bank 307 disposed at a boundary between the pixel regions P1 through P3 and a second bank 308 disposed at a central portion of the third pixel region P3, It is determined by energy.

That is, the smaller the surface tension of the organic luminescent material solution (not shown), the better the spreadability of the organic luminescent material solution (not shown) and the better the surface of the surface in contact with the dropping organic luminescent material solution The larger the energy, the better the spreadability.

On the other hand, since the organic luminescent material solution (not shown) having a small surface tension is unevenly dried in the drying process to lower the thickness uniformity of the organic luminescent layer 310, the organic luminescent material solution (Not shown).

In addition, when the surface energy of the surface contacting the organic luminescent material solution (not shown) is compared, the upper surface of the first and second banks 307 and 308 (the first electrode 305, the first and second banks 305, (307, 308).

The upper surface of the first bank 307 disposed at the boundary between the pixel regions P1 to P3 has the smallest surface energy so that the organic light emitting material solution (not shown) of each of the pixel regions P1 to P3 ) From mixing with each other.

On the other hand, a drop of the organic light emitting material solution (not shown) in which a dropping organic light emitting material solution (not shown) is spread over the first electrode 305 of each pixel region P1 to P3 as a whole And the number of drops of the organic luminescent material solution (not shown) for forming the thickness of the target organic luminescent layer 310 is referred to as the target thickness drop number.

At this time, since the side wall of the second bank 308 disposed at the center of the third pixel region P3 has the smallest surface energy as the side wall of the first bank 307, both side walls of the second bank 308 are divided The organic electroluminescent material solution (not shown) dropped in the third pixel region P3 is prevented from being biased toward both side walls of the first bank 307 located in the minor axis direction of the third pixel region P3 .

That is, by increasing the spreadability of the organic light emitting material solution (not shown) in which the second bank 308 is dropped, it is possible to prevent the minimum drop number from becoming larger than the target thickness drop number.

Accordingly, as shown in FIG. 8B, after the drying process, the organic light emitting layer 310 may have a desired thickness T to improve the display quality of the organic light emitting diode display.

8A, since the first pixel region P1 has an area smaller than that of the third pixel region P3, even if the second bank 308 is not disposed in the first pixel region P1 The spread of the organic light emitting material solution (not shown) dropped on the first electrode 305 of the first pixel region P1 may not be lowered.

Accordingly, the organic light emitting layer 310 having the target thickness T may be formed after the drying process. This also applies to the second pixel region P2.

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
105: first electrode
107, 108: first and second banks
110: organic light emitting layer

Claims (8)

A substrate including first to third pixel regions;
A first electrode disposed on each of the first to third pixel regions on the substrate;
A first bank covering the first electrode edge and surrounding the first through third pixel regions on the substrate;
A second bank connected to the first bank central portion located in a minor axis direction or a major axis direction of at least one pixel region of the first to third pixel regions and disposed above the first electrode; And
The organic light emitting layer
And an organic light emitting diode (OLED) display device.
The method according to claim 1,
Wherein the third pixel region is larger in area than the first and second pixel regions, and the second bank is disposed in the third pixel region.
3. The method of claim 2,
And the second bank has a smaller width than the first bank disposed at each of the first to third pixel region boundaries.
The method according to claim 1,
Wherein the first and second banks are made of the same material.
5. The method of claim 4,
Wherein the first and second banks are made of an organic material.
5. The method of claim 4,
Wherein the upper surfaces of the first and second banks are hydrophobic and the side walls thereof are hydrophilic.
5. The method of claim 4,
Wherein the first and second banks have the same height.
The method according to claim 1,
And a second electrode
And an organic light emitting diode (OLED) display device.

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