KR20170079336A - Organic light emitting diode display device - Google Patents

Abstract

The present invention provides a liquid crystal display device including a substrate including at least three pixel regions arranged in a horizontal direction and having a first pixel region boundary portion and a second pixel region boundary portion having a smaller width than the first pixel region disposed between the pixel regions, A first electrode arranged in each pixel region, a first bank arranged to surround each pixel region on the substrate, and a second bank disposed above the first bank and exposing the edge portions of the first bank.
At this time, the second bank located at the boundary portion of the first pixel region has an opening for exposing the center portion of the first bank.
As a result, the uniformity of the thickness of the organic light emitting layer can be improved to improve the luminance unevenness phenomenon.

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 (OLED) display device, and more particularly, to an organic light emitting diode display device capable of improving the thickness uniformity of the organic light emitting layer.

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.

As shown in the drawing, a conventional organic light emitting diode display device includes a substrate 11 including first to third pixel regions P1 to P3 arranged in a horizontal direction, A first electrode 20 disposed on each of the first to third pixel regions P1 to P3 on the protective layer 17 and a protective layer 17 covering the edges of the first electrode 20, And a bank 50 surrounding the first to third pixel regions P1 to P3 on the upper side of the pixel regions 17 to 17.

The protective layer 17 further includes a driving voltage wiring 13 and a data wiring 15 which are respectively disposed on the substrate 11 and the protective layer 17 covers the driving voltage wiring 13 and the data wiring 15, (11).

On the other hand, in order to realize a large-area organic light emitting diode display device, since a driving voltage is supplied to a plurality of pixel regions P1 to P3 through one driving voltage wiring 17, a driving voltage drop occurs, .

The width of the first boundary portion B1 between the first and second pixel regions P1 and P2 is set to be the same as the width of the second boundary portion between the second and third pixel regions P2 and P3, The driving voltage wiring 13 is arranged in the vertical direction below the protective layer 17 of the first boundary portion B1 between the first and second pixel regions P1 and P2 And the data line 15 is arranged in the vertical direction below the protective layer 17 at the second boundary B2 between the second and third pixel regions P2 and P3.

Thus, the width of the driving voltage wiring 13 can be increased correspondingly to the width of the first boundary portion B1 between the first and second pixel regions P1 and P2, and the large area organic light emitting diode display Even if the device is implemented, the driving voltage drop can be minimized to prevent display quality deterioration.

At this time, the width of the bank 50 formed at the boundary portions B1 and B2 between the pixel regions P1 to P3 is larger than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3 1 and the first boundary portion B1 between the second pixel regions P1, P2.

(Not shown) for driving the respective pixel regions P1 to P3 are disposed below the first to third pixel regions P1 to P3, and a driver (not shown) The width of the bank 50 located in the major axis direction is formed to be larger than the minor axis direction of each of the pixel regions P1 to P3.

The organic light emitting layers 70a to 70c are formed on the first electrode 20 by a solution process including an inkjet printing method soluble process.

Specifically, as shown in the drawing, an organic light emitting material solution (not shown) is dropped on the first electrode 20 of each of the pixel regions P1 to P3, and then a drop The organic luminescent material solution (not shown) is dried to form the organic luminescent layers 70a to 70c.

At this time, as described above, the width of the bank 50 is smaller than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3 between the first and second pixel regions P1 and P2 Is larger at the first boundary portion B1 and larger at the long axis position than the short axis direction of the first to third pixel regions P1 to P3.

Accordingly, when the organic light emitting material solution (not shown) is dropped on each of the pixel regions P1 to P3, the first boundary portion B1 between the first and second pixel regions P1 and P2 is interposed between the pixel regions P1 to P3. The evaporation environment of the solvent molecules of the organic light emitting material solution (not shown) located at one side of the first and second pixel regions P1 and P2 adjacent to the first and second pixel regions P2 and P3 is Is different from the evaporation environment of the solvent molecules of the organic light emitting material solution (not shown) located at one side of the second and third pixel regions P2 and P3 adjacent to each other with the second boundary B2 therebetween.

That is, in the drying process of the organic luminescent material solution (not shown), the evaporation rate of the solvent molecules of the organic luminescent material solution (not shown) located at one side of the first and second pixel regions P1 and P2, Is faster than the evaporation rate of the solvent molecules of the organic light emitting material solution (not shown) located at one side of the third pixel regions P2 and P3.

Accordingly, the thickness of the organic light emitting layers 70a and 70b formed in the first and second pixel regions P1 and P2, unlike the third pixel region P3, after the organic light emitting material solution (not shown) And becomes thicker adjacent to the first boundary portion B1 between the first and second pixel regions P1 and P2.

The evaporation environment of the organic luminescent material solution (not shown) located in the major axis direction of each of the pixel regions P1 to P3 is different from the evaporation environment of the organic luminescent material solution (not shown) located in the minor axis direction.

That is, in the drying process of the organic light emitting material solution (not shown), the evaporation rate of the organic light emitting material solution (not shown) located in the long axis direction of each pixel region P1 to P3 is (Not shown).

The thicknesses of the organic light emitting layers 70a to 70c formed in the first to third pixel regions P1 to P3 after the drying process of the organic light emitting material solution (not shown) In the major axis direction.

As described above, the organic light emitting layers 70a to 70c formed with a non-uniform thickness lower the display quality of the organic light emitting diode display device and lower the luminous efficiency and lifetime of the organic light emitting diode.

It is an object of the present invention to provide an organic light emitting diode display device capable of improving the uniformity of the thickness of the organic light emitting layer and improving the luminance nonuniformity phenomenon.

According to an aspect of the present invention, there is provided a display device including three or more pixel regions arranged in a horizontal direction, and a first boundary portion and a second boundary portion having a smaller width than the first boundary portion are disposed between the pixel regions A liquid crystal display device includes a substrate, a first electrode arranged in each pixel region on the substrate, a first bank arranged to surround each pixel region on the substrate, and a second bank exposed at the edge portion of the first bank and disposed above the first bank And an organic light emitting diode (OLED) display device.

At this time, the second bank located at the first boundary portion has an opening portion exposing the center portion of the first bank, or the first bank edge portion exposed by the second bank has a larger width at the first boundary portion than the second boundary portion .

In addition, the first bank edge portion exposed by the second bank has a greater width at the position in the major axis direction than the minor axis direction of each pixel region, and the first bank of the first boundary portion has a larger width than the first bank of the second boundary portion .

The display device may further include a substrate including at least three pixel regions arranged in the horizontal direction and having a first boundary portion and a second boundary portion having a smaller width than the first boundary portion disposed between the pixel regions, A first electrode arranged in each pixel region above the protective layer, and a bank arranged surrounding each pixel region above the protective layer.

At this time, the bank located at the first boundary portion has an opening for exposing the protective layer.

The present invention can prevent luminance unevenness due to a decrease in thickness uniformity of the organic light emitting layer, and improve the luminous efficiency and lifetime of the organic light emitting diode.

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 showing 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 plan view showing 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 showing an organic light emitting diode display device according to a third embodiment of the present invention.
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.

≪ Embodiment 1 >

3 is a cross-sectional view taken along line IVa-IVa of FIG. 3, and FIG. 4b is a cross-sectional view taken along line IVb-IVb of FIG. 3. Referring to FIG. Fig.

As shown in the drawing, an organic light emitting diode display device according to a first embodiment of the present invention includes a substrate 101 including first to third pixel regions P1 to P3 arranged in a horizontal direction, A first electrode 120 disposed on each of the first to third pixel regions P1 to P3 on the substrate 101 so as to cover the edge portion of the first electrode 120, And a second bank 150 disposed above the first bank 130 while exposing the edge portions E1 and E2 of the first bank 130. The first bank 130 includes a first bank 130, .

At this time, the edge portions E1 and E2 of the first bank 130 exposed by the second bank 150 are arranged in a direction parallel to the edge portion E1 located in the minor axis direction of each of the pixel regions P1 to P3, And an edge portion (E2) positioned thereon.

It further includes a driving voltage wiring 113 and a data wiring 115 respectively disposed on the substrate 101 and a protective layer 117 disposed over the driving voltage wiring 113 and the data wiring 115 , And the first electrode 120 is disposed on the protection layer 117.

On the other hand, in order to realize a large-area organic light emitting diode display device, a driving voltage is required to be supplied to a plurality of pixel regions P1 to P3 through one driving voltage wiring 113, .

The width of the first boundary portion B1 between the first and second pixel regions P1 and P2 is set to be the same as the width of the second boundary portion between the second and third pixel regions P2 and P3, The driving voltage wiring 113 is arranged in the vertical direction below the protective layer 117 of the first boundary portion B1 between the first and second pixel regions P1 and P2 And the data lines 115 are arranged in the vertical direction below the protective layer 117 at the second boundary B2 between the second and third pixel regions P2 and P3.

The width of the driving voltage wiring 113 can be increased correspondingly to the width of the first boundary portion B1 between the first and second pixel regions P1 and P2, Even if the device is implemented, the driving voltage drop can be minimized to prevent display quality deterioration.

At this time, the width of the first bank 130 formed at the boundary portions B1 and B2 between the pixel regions P1 to P3 is larger than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3, Is formed to be larger at the first boundary portion B1 between the first and second pixel regions P1 and P2.

In addition, three or more pixel regions may be included on the substrate 101. For example, a fourth pixel region (not shown) may be further disposed on one side of the first to third pixel regions P1 to P3, and between the third and fourth pixel regions P3 and P3 Is formed to be equal to the width of the second boundary portion B2 between the second and third pixel regions P2 and P3.

In addition, a driving transistor (not shown), a switching transistor (not shown), a switching transistor (not shown) are formed on the lower side of the first to third pixel regions P1 to P3, And a capacitor (not shown), and a driving unit (not shown) driving each of the pixel regions P1 to P3 is disposed. Since the first bank 130 is disposed above the driving unit (not shown) The width of the first bank 130 located in the major axis direction of the third pixel regions P1 to P3 is relatively large.

The first bank 120 is made of a transparent conductive material having a relatively large work function value to serve as an anode electrode. The first bank 130 is made of an inorganic material having hydrophilicity. The second bank 150 is made of a non- Is made of an organic material having hydrophobicity.

The organic emission layers 170a to 170c are formed on the first electrode 120. The organic emission layers 170a to 170c may be formed by a solution process including an inkjet printing process and a nozzle printing process soluble process.

4A and 4B, an organic light emitting material solution (not shown) is dropped onto the first electrode 120 of each of the pixel regions P1 to P3, (not shown) is dropped to form organic light emitting layers 170a to 170c.

At this time, the second bank 150 has a hydrophobic property to prevent the organic light emitting material solutions (not shown) dropped in the pixel regions P1 to P3 from mixing with each other .

Since the first bank 130 is hydrophilic, the edges of the organic luminescent layers 170a to 170c are relieved from being curled up to the side walls of the second bank 150 during the drying process. Thus, the organic luminescent layers 170a to 170c, It is possible to improve the uniformity of the thickness of the film.

As described above, the width of the first bank 130 is greater than the width of the second boundary B2 between the second and third pixel regions P2 and P3 between the first and second pixel regions P1 and P2 And is larger in the long axis direction than the short axis direction of the first to third pixel regions P1 to P3.

The second bank 150 located at the first boundary B1 between the first and second pixel regions P1 and P2 has an opening op exposing the central portion C of the first bank 130 Respectively.

The edge portions E1 and E2 of the first bank 130 exposed by the second bank 150 have a larger width in the major axis direction than the minor axis direction of the first to third pixel regions P1 to P3 .

The organic luminescent material solution may be applied not only to the upper portion of the first electrode 120 of each pixel region P1 to P3 but also to the upper portion of the central portion C of the first bank 130 exposed by the opening op And are dropped together.

Thereafter, the dummy organic light emitting layer 171 is formed in the central portion C of the first bank 130 exposed by the opening op.

At this time, since the dummy organic light emitting layer 171 does not emit light during image display, no problem arises even if the thickness thereof is formed non-uniformly.

When an organic light emitting material solution (not shown) is dropped on the first electrode 120 of each of the pixel regions P1 to P3, the first and second banks 130 and 130, which are exposed by the second bank 150, (Not shown) is spread on the edge portions E1 and E2.

Due to the organic luminescent material solution (not shown) positioned at the central portion C and the edge portions E1 and E2 of the first bank 130 exposed by the second bank 150, The amount of the organic luminescent material solution (not shown) located near the organic light emitting layer P3 is similar.

Accordingly, in the course of drying the organic luminescent material solution (not shown), the evaporation rates of the solvent molecules of the organic luminescent material solution (not shown) located in the pixel regions P1 to P3 become similar to each other.

Further, after the organic light emitting material solution (not shown) is dried, the thicknesses of the organic light emitting layers 170a to 170c formed in the first to third pixel regions P1 to P3 are uniform.

Thus, deterioration of the display quality of the organic light emitting diode display device can be prevented, and the luminous efficiency and lifetime of the organic light emitting diode can be prevented.

≪ Embodiment 2 >

FIG. 5 is a plan view illustrating an organic light emitting diode 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- Fig.

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 arranged in a horizontal direction, A first electrode 220 disposed on each of the first to third pixel regions P1 to P3 on the substrate 201 and a second electrode region 220 on the substrate 201 covering the edge portion of the first electrode 220, And a second bank 250 disposed above the first bank 230 while exposing the edge portions E1 and E2 of the first bank 230. The first bank 230 may include a first bank 230, .

At this time, the edge portions E1 and E2 of the first bank 230 exposed by the second bank 250 are separated from the edge portion E1 located in the minor axis direction of each pixel region P1 to P3, And an edge portion (E2) positioned thereon.

The organic EL device further includes a driving voltage wiring 213 and a data wiring 215 disposed on the substrate 201 and a protective layer 217 disposed on the driving voltage wiring 213 and the data wiring 215, , And the first electrode 220 is disposed on the protection layer 217.

In order to realize a large area organic light emitting diode display device, a driving voltage is supplied to a plurality of pixel regions P1 to P3 through one driving voltage wiring 213, so that a driving voltage drop occurs, .

The width of the first boundary portion B1 between the first and second pixel regions P1 and P2 is set to be the same as the width of the second boundary portion between the second and third pixel regions P2 and P3, The driving voltage wiring 213 is arranged in the vertical direction below the protective layer 217 of the first boundary portion B1 between the first and second pixel regions P1 and P2 And the data line 215 is arranged in the vertical direction below the protective layer 217 of the second boundary B2 between the second and third pixel regions P2 and P3.

The width of the driving voltage wiring 213 can be increased correspondingly to the width of the first boundary portion B1 between the first and second pixel regions P1 and P2, Even if the device is implemented, the driving voltage drop can be minimized to prevent display quality deterioration.

At this time, the width of the first bank 230 formed at the boundary portions B1 and B2 between the pixel regions P1 to P3 is set to the width of the first boundary portion B1 between the second and third pixel regions P2 and P3, Is formed to be larger at the second boundary portion B2 between the first and second pixel regions P1 and P2.

In addition, three or more pixel regions may be included on the substrate 201. For example, a fourth pixel region (not shown) may be further disposed on one side of the first to third pixel regions P1 to P3, and between the third and fourth pixel regions P3 and P3 Is formed to be equal to the width of the second boundary portion B2 between the second and third pixel regions P2 and P3.

In addition, a driving transistor (not shown), a switching transistor (not shown), a switching transistor (not shown) are formed on the lower side of the first to third pixel regions P1 to P3, And a capacitor (not shown), and a driving unit (not shown) for driving each of the pixel regions P1 to P3 is disposed and the first bank 230 is disposed above the driving unit The width of the first bank 230 located in the major axis direction of the third pixel regions P1 to P3 is relatively large.

The first electrode 220 is made of a transparent conductive material having a relatively large work function value to serve as an anode electrode. The first bank 230 is made of an inorganic material having hydrophilicity. The second bank 250 is made of, Is made of an organic material having hydrophobicity.

The organic emission layers 270a to 270c are formed on the first electrode 220. The organic emission layers 270a to 270c may be formed by a solution process including an inkjet printing process and a nozzle printing process soluble process.

Specifically, as shown in FIGS. 6A and 6B, an organic light emitting material solution (not shown) is dropped onto the first electrode 220 of each pixel region P1 to P3, (not shown) is dropped to form organic light emitting layers 270a to 270c.

At this time, the second bank 250 has a hydrophobic property to prevent the organic light emitting material solutions (not shown) dropped in the pixel regions P1 to P3 from mixing with each other .

In addition, since the first bank 230 has hydrophilicity, the edge portions of the organic light emitting layers 270a to 270c are dried to the side walls of the second bank 250 during the drying process, and the organic light emitting layers 270a to 270c, It is possible to improve the uniformity of the thickness of the film.

As described above, the width of the first bank 230 is greater than the width of the second boundary B2 between the second and third pixel regions P2 and P3 between the first and second pixel regions P1 and P2 And is larger in the long axis direction than the short axis direction of the first to third pixel regions P1 to P3.

The edge portions E1 and E2 of the first bank 230 exposed by the second bank 250 are located closer to the first boundary portion B2 than the second boundary portion B2 between the second and third pixel regions P2 and P3. And the first boundary portion B1 between the first pixel region P1 and the second pixel region P1 and the second boundary portion B2 between the second and third pixel regions P2 and P3, And has a greater width at the long axis position of the three pixel regions P1 to P3.

The width of the second bank 250 located at the first and second boundary portions B1 and B2 may be the same.

At this time, when an organic light emitting material solution (not shown) is dropped onto the first electrode 220 of each of the pixel regions P1 to P3, the first bank (Not shown) is also spread on the edge portions E1 and E2.

In addition, since the edge portion E2 of the first bank 230 having a relatively large width has more organic emissive material solution (not shown) than the edge portion E1 of the first bank 230 having a relatively small width .

As described above, the organic luminescent material solution (not shown) positioned around the pixel regions P1 to P3 due to the organic luminescent material solution (not shown) located at the edge portions E1 and E2 exposed by the second bank 250, Amount) becomes similar.

Accordingly, in the course of drying the organic luminescent material solution (not shown), the evaporation rates of the solvent molecules of the organic luminescent material solution (not shown) located in the pixel regions P1 to P3 become similar to each other.

Further, after the organic light emitting material solution (not shown) is dried, the thicknesses of the organic light emitting layers 270a to 270c formed in the first to third pixel regions P1 to P3 are uniform.

Thus, deterioration of the display quality of the organic light emitting diode display device can be prevented, and the luminous efficiency and lifetime of the organic light emitting diode can be prevented.

≪ Third Embodiment >

FIG. 7 is a plan view showing an organic light emitting diode display according to a third embodiment of the present invention, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

As shown in the figure, an organic light emitting diode display device according to a third embodiment of the present invention includes a substrate 301 including first to third pixel regions P1 to P3 arranged in a horizontal direction, A first electrode 320 disposed on each of the first to third pixel regions P1 to P3 on the substrate 301 so as to cover the edge portion of the first electrode 320, P1 to P3, respectively.

It further includes a driving voltage wiring 313 and a data wiring 315 disposed on the substrate 301 and a protective layer 317 disposed on the driving voltage wiring 313 and the data wiring 315, , And the first electrode 320 is disposed on the protective layer 317.

On the other hand, in order to realize a large-area organic light emitting diode display device, a driving voltage is supplied to a plurality of pixel regions P1 to P3 through one driving voltage wiring 313, .

The width of the first boundary portion B1 between the first and second pixel regions P1 and P2 is set to be the same as the width of the second boundary portion between the second and third pixel regions P2 and P3, The driving voltage wiring 313 is arranged in the vertical direction below the protective layer 317 of the first boundary portion B1 between the first and second pixel regions P1 and P2 And the data line 315 is arranged in the vertical direction below the protective layer 317 at the second boundary B2 between the second and third pixel regions P2 and P3.

This makes it possible to increase the width of the driving voltage wiring 313 corresponding to the width of the first boundary portion B1 between the first and second pixel regions P1 and P2, Even if the device is implemented, the driving voltage drop can be minimized to prevent display quality deterioration.

At this time, the width of the bank 350 formed at the boundary portions B1 and B2 between the pixel regions P1 to P3 is larger than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3 1 and the first boundary portion B1 between the second pixel regions P1, P2.

In addition, three or more pixel regions may be included on the substrate 301. For example, a fourth pixel region (not shown) may be further disposed on one side of the first to third pixel regions P1 to P3, and between the third and fourth pixel regions P3 and P3 Is formed to be equal to the width of the second boundary portion B2 between the second and third pixel regions P2 and P3.

In addition, a driving transistor (not shown), a switching transistor (not shown), a switching transistor (not shown) are formed on the lower side of the first to third pixel regions P1 to P3, And a capacitor (not shown), and a driving unit (not shown) for driving each of the pixel regions P1 to P3 is disposed and the bank 350 is disposed above the driving unit (not shown) The width of the bank 350 located in the major axis direction of the pixel regions P1 to P3 is formed to be relatively large.

In addition, the first electrode 320 is made of a transparent conductive material having a relatively large work function value to serve as an anode electrode, and the bank 350 is made of a material having hydrophobicity.

The organic emission layers 370a to 370c are formed on the first electrode 320. The organic emission layers 370a to 370c may be formed by a solution process including an inkjet printing process and a nozzle printing process soluble process.

Specifically, as shown in FIG. 8, an organic light emitting material solution (not shown) is dropped on the first electrodes 320 of the pixel regions P1 to P3, (Not shown) is dried to form organic light emitting layers 370a to 370c.

At this time, the bank 350 has a hydrophobic property and serves as a barrier to prevent the organic light emitting material solutions (not shown) dropped on the pixel regions P1 to P3 from being mixed with each other.

As described above, the width of the bank 350 is smaller than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3, that is, the width between the first and second pixel regions P1 and P2 1 boundary B1.

The bank 350 located at the first boundary B1 between the first and second pixel regions P1 and P2 has an opening op that exposes the protective layer 317. [

On the other hand, when an organic light emitting material solution (not shown) is dropped onto the first electrode 320 of each of the pixel regions P1 to P3, The organic luminescent material solution (not shown) is dropped together.

Thereafter, when a drying process is performed, a dummy organic light emitting layer 371 is formed on the protective layer 317 exposed by the opening op.

At this time, since the dummy organic light emitting layer 371 does not emit light during image display, no problem arises even if the thickness is made nonuniform.

Further, even if the width of the boundary between the pixel regions P1 to P3 is different, due to the organic luminescent material solution (not shown) dropped on the bank 350 exposed by the opening portion op, The amount of the organic luminescent material solution (not shown) located around each pixel region P1 to P3 becomes similar.

Accordingly, in the course of drying the organic luminescent material solution (not shown), the evaporation rates of the solvent molecules of the organic luminescent material solution (not shown) located in the pixel regions P1 to P3 become similar to each other.

Further, after the organic light emitting material solution (not shown) is dried, the thicknesses of the organic light emitting layers 370a to 370c formed in the first to third pixel regions P1 to P3 become uniform.

Thus, deterioration of the display quality of the organic light emitting diode display device can be prevented, and the luminous efficiency and lifetime of the organic light emitting diode can be prevented from lowering.

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
120: first electrode
130: first bank
150: second bank
170a to 170c: organic light-

Claims (17)

A substrate including at least three pixel regions arranged in a horizontal direction, a first boundary portion between each pixel region and a second boundary portion having a width smaller than that of the first boundary portion;
A first electrode disposed on each of the pixel regions on the substrate;
A first bank disposed to surround the pixel regions on the substrate; And
And a second bank exposed above the first bank edge portion and disposed above the first bank,
And the second bank located at the first boundary has an opening exposing the center of the first bank.
The method according to claim 1,
Wherein the first bank edge portion exposed by the second bank has a greater width at a position in the major axis direction than the minor axis direction of each pixel region.
The method according to claim 1,
Wherein the first bank of the first boundary has a greater width than the first bank of the second boundary.
The method of claim 3,
A driving voltage wiring disposed under the first bank of the first boundary portion; And
And a data line disposed under the first bank of the second boundary portion
And an organic light emitting diode (OLED) display device.
5. The method of claim 4,
And the driving voltage wiring is disposed below the opening.
3. The method of claim 2,
And a driving unit disposed in a lower portion of the first bank,
And an organic light emitting diode (OLED) display device.
The method according to claim 1,
An organic light emitting layer disposed on the first electrode; And
A dummy organic light-emitting layer disposed on the first bank exposed by the opening,
And an organic light emitting diode (OLED) display device.
A substrate including at least three pixel regions arranged in a horizontal direction, a first boundary portion between each pixel region and a second pixel region boundary portion having a width smaller than that of the first boundary portion;
A first electrode disposed on each of the pixel regions on the substrate;
A first bank disposed to surround the pixel regions on the substrate; And
And a second bank exposed above the first bank edge portion and disposed above the first bank,
Wherein the first bank edge portion exposed by the second bank has a greater width at the first boundary than the second boundary portion.
9. The method of claim 8,
Wherein the first bank edge portion exposed by the second bank has a greater width at a position in the major axis direction of the pixel region than the second boundary portion.
9. The method of claim 8,
And the second banks of the first and second boundaries have the same width.
9. The method of claim 8,
Wherein the first bank of the first boundary has a greater width than the first bank of the second boundary.
12. The method of claim 11,
A driving voltage wiring disposed under the first bank of the first boundary portion; And
And a data line disposed under the first bank of the second boundary portion
And an organic light emitting diode (OLED) display device.
10. The method of claim 9,
And a driving unit disposed in a lower portion of the first bank,
And an organic light emitting diode (OLED) display device.
A substrate including at least three pixel regions arranged in a horizontal direction, a first boundary portion between each pixel region and a second boundary portion having a width smaller than that of the first boundary portion;
A protective layer disposed on the substrate; And
A first electrode disposed in each pixel region above the protective layer;
And a bank disposed around the respective pixel regions on the protection layer,
And the bank located at the first boundary portion has an opening exposing the protective layer.
15. The method of claim 14,
A driving voltage wiring disposed under the protection layer of the first boundary portion; And
A data line disposed under the protective layer of the second boundary portion;
And an organic light emitting diode (OLED) display device.
16. The method of claim 15,
And the driving voltage wiring is disposed below the opening.
15. The method of claim 14,
An organic light emitting layer disposed on the first electrode; And
A dummy organic light emitting layer disposed on the protective layer exposed by the opening,
And an organic light emitting diode (OLED) display device.

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