TWI624053B - Organic light emitting diode display device - Google Patents

Abstract

The present invention provides an organic light emitting diode display device, including: a substrate including at least three pixel regions arranged in a horizontal direction; a first electrode disposed in each pixel region on the substrate; and a bank surrounding Each pixel region; and a power line disposed in the horizontal direction on the lower side of each pixel region on the substrate, and applying a driving voltage to each pixel region.

Description

Organic light emitting diode display device

The present invention relates to an organic light emitting diode display device (OLED), and more particularly, to an organic light emitting diode display device capable of improving thickness consistency of an organic light emitting layer.

Recently, flat display devices such as a plasma display panel (PDP), a liquid crystal display device (LCD), and an organic light emitting diode display device have been deeply researched and developed.

Among these flat display devices, the organic light-emitting diode display device is a self-light-emitting device. Since a backlight module required for an LCD is not required, it can be used to manufacture an ultra-thin display device.

In addition, compared to LCDs, organic light emitting diode display devices have excellent viewing angle, contrast ratio, low power consumption, low DC voltage operability, fast response time, resistance to external impact due to solid internal components, and Wide operating temperature range and other advantages.

In particular, the process of manufacturing the organic light emitting diode display device is simple, and the manufacturing cost can be reduced more than that of the LCD.

FIG. 1 is a plan view of a conventional OLED, FIG. 2A is a cross-sectional view taken along the line IIa-IIa in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. 1.

1 to 2B, 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 planarization layer 17 provided On the substrate 11; a first electrode 20 is disposed on the planarization layer 17 and is disposed in each of the first to third pixel regions P1 to P3; and a bank 50 covering the first electrode 20 and surround each of the first to third pixel regions on the planarization layer 17.

The organic light emitting diode display device further includes a power line 13 and a data line 15 arranged in a vertical direction on the boundary portions B1 and B2 between the first to third pixel regions P1 to P3; And a gate line 14 that intersects with the power line 13 and the data line 15, and the gate line 14 is disposed below the first to third pixel regions P1 to P3.

A gate insulating layer 12 is disposed on the substrate 11 to cover the gate lines 14, and a planarization layer 17 is disposed on the gate insulating layer 12 to cover the power lines 13 and the data lines 15.

When the organic light emitting diode display device is in operation, a driving voltage is applied to the first to third pixel regions P1 to P3 through the single power line 13. Therefore, the driving voltage will be reduced and the display quality will be attenuated.

To prevent the driving voltage from decreasing, the width of the first boundary portion B1 between the first and second pixel regions P1 and P2 is wider than the width of the second boundary portion B2 between the second and third pixel regions P2 and P3. The power line 13 is disposed on the gate insulating layer 12 at the first boundary portion B1, and the data line 15 is disposed on the gate insulating layer 12 at the second boundary portion B2.

Thereby, the width of the power supply line 13 corresponds to the width and height of the first boundary portion B1, so even in a large-sized organic light emitting diode display device, the reduction of the driving voltage can be reduced, and the display quality can be avoided. attenuation.

The width of the bank 50 at the first boundary portion B1 is wider than the width of the bank 50 at the second boundary portion B2.

Organic light emitting layers 70a, 70b, and 70c are formed on the respective first electrodes 20, and the organic light emitting layers 70a, 70b, and 70c are formed by a solution process method, such as an injection printing method, a nozzle printing method, and the like. .

Specifically, referring to FIG. 2A and FIG. 2B, an organic light emitting material solution is dropped on the first electrode 20 in each of the first to third pixel regions P1 to P3, and then the organic light emitting material solution is processed. By drying, the organic light emitting layers 70a, 70b, and 70c can be formed. However, an OLED having this structure is likely to cause, for example, OLED display quality degradation, light emission efficiency reduction, and OLED lifetime reduction. After research, a possible reason for this defect was found, which will be described in detail below, and some embodiments of the present invention are based on this finding.

In this example, the width of the bank 50 at the first boundary portion B1 is wider than the width of the bank 50 at the second boundary portion B2.

Therefore, for the organic light-emitting material solution dropped in each of the first to third pixel regions P1 to P3, the first and second pixel regions P1 and P2 are located near the first boundary portion B1. In this organic light-emitting material solution on this side, the environment in which the solvent molecules evaporate is different from that on the side of the second and third pixel regions P2 and P3 that is close to the second boundary portion B2.

In other words, when the organic light-emitting material solution is dried, the solvent molecule evaporation rate of the organic light-emitting material solution located on the side of the first and second pixel regions P1 and P2 near the first boundary portion B1 will be lower than that of the organic light-emitting material solution. In the second and third pixel regions P2 and P3, the evaporation rate on the side close to the second boundary portion B2 is fast.

Therefore, after the organic light-emitting material solution is dried, as shown in FIG. 2A, unlike the organic light-emitting layer 70c formed in the third pixel region P3, the organic light-emitting layer formed in the first and second pixel regions P1 and P2 is different. The thickness of the light-emitting layers 70a and 70b near the first boundary portion B1 becomes thicker.

Due to the inconsistent thickness of the organic light emitting layers 70a, 70b, and 70c, the display quality of the OLED is attenuated, the light emission efficiency is reduced, and the life of the OLED is also shortened.

The invention provides an organic light emitting diode display device, which can substantially solve the problems caused by limitations or disadvantages in the prior art.

An object of the present invention is to improve the problems of inconsistent thickness and brightness of the organic light emitting layer.

Other technical features and advantages of the present invention will be described below, and some of them can be known through description or implementation. The advantages of the present invention can be easily understood or accomplished from the structures indicated in the following description, patent application scope, and drawings.

In order to achieve the foregoing objects and advantages, and can be specifically implemented and widely described, the present invention provides an organic light emitting diode display device, including: a substrate including at least three pixel regions arranged in a horizontal direction; a first An electrode is provided in each pixel region on the substrate; a bank surrounds each pixel region; and a power line is provided in a horizontal direction on the lower side of each pixel region on the substrate, and for each A driving voltage is applied to the pixel area.

In a further aspect, an organic light-emitting diode display device includes a substrate including a plurality of gate lines and a plurality of data lines interlaced with each other, and horizontally arranged and located between the gate lines and At least three pixel areas where the data lines intersect with each other; a first electrode, Disposed in each pixel region on the substrate; a bank surrounding each pixel region; and a power line parallel to the gate line and applying a driving voltage to each pixel region.

In another aspect, an organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of vertical directions, and the pixel regions on the same vertical row emit the same color; A first electrode is disposed in each pixel region on the substrate; a bank surrounds each pixel group, the pixel group is composed of two or more adjacent pixel regions on the same vertical row; and an organic The light emitting layer is disposed on the first electrode and corresponds to each pixel group.

In yet another aspect, an organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of vertical rows, and the pixel regions on the same vertical row emit the same color; a first An electrode is disposed in each pixel region on the substrate; a bank is disposed between each adjacent row of pixel regions, and the bank includes at least a first portion and second portions extending from both sides of the first portion. Part, the thickness of the second parts is smaller than the thickness of the first part; and an organic light emitting layer is disposed on the first electrode and the second part.

The foregoing description and the examples and descriptions listed below are provided to illustrate the invention.

11‧‧‧ substrate

12‧‧‧Gate insulation

13‧‧‧Power cord

14‧‧‧Gate line

15‧‧‧ data line

17‧‧‧ flattening layer

20‧‧‧First electrode

50‧‧‧ embankment

70a, 70b, 70c‧‧‧Organic light emitting layer

101‧‧‧ substrate

112‧‧‧Gate insulation

113‧‧‧Power cord

114‧‧‧Gate line

115‧‧‧ Data Line

117‧‧‧ flattening layer

120‧‧‧first electrode

150‧‧‧ embankment

170a, 170b, 170c‧‧‧ organic light emitting layer

201‧‧‧ substrate

212‧‧‧Gate insulation

213‧‧‧Power cord

214‧‧‧Gate line

215‧‧‧Data Line

217‧‧‧ flattening layer

220‧‧‧first electrode

221‧‧‧Auxiliary electrode

250‧‧‧ embankment

270a, 270b, 270c‧‧‧ organic light emitting layer

301‧‧‧ substrate

320‧‧‧first electrode

340‧‧‧ insulation pattern

350‧‧‧ embankment

370a, 370b, 370c‧‧‧Organic light emitting layer

401‧‧‧ substrate

420‧‧‧first electrode

450‧‧‧ embankment

470a, 470b, 470c‧‧‧Organic light emitting layer

500‧‧‧ Nozzle

501‧‧‧ substrate

510‧‧‧Nozzle

510a‧‧‧Nozzle

520‧‧‧first electrode

550‧‧‧ embankment

551‧‧‧Part I

552‧‧‧Part II

570a, 570b, 570c‧‧‧Organic light emitting layer

B1‧‧‧ border area / first border area

B2‧‧‧ border area / second border area

CH‧‧‧ contact hole

P1‧‧‧first pixel area

P2‧‧‧second pixel area

P3‧‧‧ third pixel area

PG, PG1, PG2 ‧‧‧ pixel group

The accompanying drawings are intended to provide a further understanding of the present invention, and constitute a part of this specification, which, besides explaining the implementation of the present invention, also explains the principle of the present invention.

FIG. 1 is a plan view of a conventional OLED.

FIG. 2A is a cross-sectional view taken along the line IIa-IIa in FIG. 1. FIG.

FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. 1.

FIG. 3 is a plan view showing an OLED according to the first embodiment of the present invention.

FIG. 4A is a cross-sectional view taken along line IVa-IVa in FIG. 3.

FIG. 4B is a cross-sectional view taken along line IVb-IVb in FIG. 3.

FIG. 5 is a plan view of an OLED according to a second embodiment of the present invention.

FIG. 6A is a cross-sectional view taken along line VIa-VIa in FIG. 5.

FIG. 6B is a cross-sectional view taken along line VIb-VIb in FIG. 5.

FIG. 7 is a plan view showing an OLED according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7.

FIG. 9 is a plan view showing an OLED of a second preferred embodiment.

Fig. 10 is a sectional view taken along line X-X in Fig. 9.

FIG. 11 is a plan view showing an OLED according to a fourth embodiment of the present invention.

FIG. 12 is a cross-sectional view taken along the line XII-VII in FIG. 11.

In the following, please refer to the embodiments in detail, and the examples will be described with drawings. The same or similar element symbols may be used in the drawings to represent the same or similar elements.

Example 1

3 is a plan view of an OLED according to a first embodiment of the present invention, FIG. 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. .

Referring to FIG. 3, an OLED according to Embodiment 1 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 the substrate 101. Each of the pixel regions P1 to P3; and a gate line 114, a data line 115, and a power line 113 disposed on the substrate 101.

The substrate 101 may include at least three pixel regions. For example, a fourth pixel region may be arranged beside one of the first to third pixel regions P1 to P3.

In detail, the gate lines 114 are horizontally arranged below the first to third pixel regions P1 to P3, and the data lines 115 are intersected with the gate lines 114 and are arranged in the first to third pixel regions. At each boundary part B1, B2 between P1 ~ P3.

The power line 113 is disposed below the first to third pixel regions P1 to P3, and is separated from the gate line 114 and parallel to the gate line 114.

Referring to FIGS. 4A and 4B, the OLED further includes a bank 150. The bank 150 is disposed on the planarization layer 117, and the planarization layer 117 is formed on the data line 115.

The bank 150 covers an edge portion of the first electrode 120 and surrounds each of the first to third pixel regions P1 to P3.

The OLED further includes a gate insulating layer 112 provided on the substrate 101. The gate insulating layer 112 covers the power lines 113 and the gate lines 114 and is disposed under the planarization layer 117.

The data line 115 is disposed between the gate insulating layer 112 and the planarization layer 117, and the first electrode 120 is disposed on the planarization layer 117.

The power line 113 and the gate line 114 may be formed in the same layer, and may be formed of the same material.

The first electrode 120 may be formed of a transparent conductive material having a relatively high work function, and may be used as an anode. The bank 150 may be formed of a hydrophobic material.

In order to apply to large-sized OLEDs, traditionally, a plurality of first to third pixel regions P1 to P3 need to apply a driving voltage through a single power line 113, but this may cause a reduction in driving voltage and deteriorate display quality.

In the OLED according to the first embodiment of the present invention, the power supply line 113 is arranged below the first to third pixel regions P1 to P3 in a horizontal direction, and the driving voltage is applied from both ends of the power supply line 113. Therefore, The problem of reduced driving voltage can be avoided.

Therefore, even if it is used for a large-sized OLED, a situation in which the driving voltage is reduced can be minimized, and the deterioration in display quality can be avoided.

Since the driving voltage is applied from two ends of the power line 113, the width of the power line 113 can be narrowed as the driving voltage decreases. Therefore, the problem that the aperture ratio is reduced due to the arrangement of the power supply lines 113 can be reduced.

Organic light emitting layers 170a, 170b, and 170c are formed on the first electrodes 120, respectively. The organic light emitting layers 170a, 170b, and 170c are laminated by a solution process method, such as an injection printing method, a nozzle printing method, and the like.

Specifically, an organic light emitting material solution is dropped on each of the first electrodes 120 in the first to third pixel regions P1 to P3, and the organic light emitting material solution is dried to form organic light emitting layers 170a, 170b, 170c.

Since the bank 150 is hydrophobic, the bank 150 can be used as a partition wall to prevent the organic light-emitting material solution dripping in the first to third pixel regions P1 to P3 from being mixed.

In addition, the data line 115 is disposed at the boundary portions B1 and B2 between the first to third pixel regions P1 to P3, and the power line is disposed below the first to third pixel regions P1 to P3. Therefore, the width of the first boundary portion B1 is the same as the width of the second boundary portion B2, and the width of the bank 150 in the first boundary portion B1 is also the same as the width of the bank 150 in the second boundary portion B2.

When the widths of the first boundary portion B1 and the second boundary portion B2 are the same, the amounts of the organic light emitting material solutions in the short axis (parallel direction) in the first to third pixel regions P1 to P3 are the same as each other.

Thereby, during the process of drying the organic light emitting material solution, the evaporation rates of the solvent molecules of the organic light emitting material solution on the short axis in the first to third pixel regions P1 to P3 can be the same as each other.

In addition, after the drying process, the thicknesses of the organic light emitting layers 170a, 170b, and 170c on the short axis in the first to third pixel regions P1 to P3 can be uniform.

Therefore, it is possible to avoid degradation of OLED display quality, reduction of light emission efficiency, and shortening of OLED lifetime.

Example 2

5 is a plan view showing an OLED 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-VIb in FIG. Illustration.

Referring to FIG. 5, an OLED 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 the substrate 201 In each of the first to third pixel regions P1 to P3, a gate line 214, a data line 215, and a power line 213 are disposed on the substrate 201.

The substrate 201 may include at least three pixel regions. For example, a fourth pixel region may be disposed beside one of the first to third pixel regions P1 to P3.

In addition, the OLED may further include an auxiliary electrode 221 disposed in a boundary portion between the pixel regions in a vertical direction and spaced apart from the first electrode 220.

In detail, the gate lines 214 are arranged in a horizontal direction below the first to third pixel regions P1 to P3. The data line 215 is intersected with the gate line 214 and is arranged at each boundary portion B1, B2 between the first to third pixel regions P1 to P3.

The power line 213 is disposed below the first to third pixel regions P1 to P3, and is separated from the gate line 214, and the power line 213 is parallel to the gate line 214. The power line 213 is electrically connected to the auxiliary electrode 221 through a contact hole CH.

Referring to FIGS. 6A and 6B, the OLED further includes a bank 250. The bank 250 is disposed on the planarization layer 217, and the planarization layer 217 is formed on the data line 215.

The bank 250 covers an edge portion of the first electrode 220 and surrounds each of the first to third pixel regions P1 to P3.

The OLED further includes a gate insulating layer 212 disposed on the substrate 201. The gate insulating layer 212 covers the power supply lines 213 and the gate lines 214 and is disposed under the planarization layer 217.

The data line 215 is disposed between the gate insulating layer 212 and the planarization layer 217, and the first electrode 220 is disposed on the planarization layer 217.

The gate insulating layer 212 and the planarization layer 217 include a contact hole CH to expose a part of the power line 213, and the power line 213 is connected to the auxiliary electrode 221 through the contact hole CH.

Although not shown in the figure, the auxiliary electrode 221 may be connected to a driving thin film transistor.

The power line 213 and the gate line 214 may be formed in the same layer, and may be formed of the same material. The first electrode 220 and the auxiliary electrode 221 may be formed in the same layer, and may be formed of the same material.

The first electrode 220 may be formed of a transparent conductive material having a relatively high work function, and may be used as an anode. The bank 250 may be formed of a hydrophobic material.

In order to apply to large-sized OLEDs, traditionally, a plurality of first to third pixel regions P1 to P3 need to apply a driving voltage through a single power line 213, but this may cause a reduction in driving voltage and deteriorate display quality.

In the OLED according to the second embodiment of the present invention, the power supply line 213 is arranged below the first to third pixel regions P1 to P3 in a horizontal direction, and the driving voltage is applied from both ends of the power supply line 213. Therefore, The problem of reduced driving voltage can be avoided.

Therefore, even if it is used for a large-sized OLED, a situation in which the driving voltage is reduced can be minimized, and the deterioration in display quality can be avoided.

Since the driving voltage is applied from two ends of the power supply line 213, the width of the power supply line 213 can be narrowed as the driving voltage decreases. Therefore, the problem that the aperture ratio is reduced due to the installation of the power supply line 113 can be reduced.

In addition, since the power supply line 213 is electrically connected to the auxiliary electrode 221 through the contact hole CH, the sheet resistance of the power supply line 213 can be reduced. The width of the power supply line 213 can be reduced according to the reduction of the resistance of the power supply line sheet. Therefore, the problem of the reduction of the aperture ratio can also be reduced.

Organic light emitting layers 270a, 270b, and 270c are formed on the respective first electrodes 220, respectively. The organic light-emitting layers 270a, 270b, and 270c are laminated by a solution process method, such as an injection printing method, a nozzle printing method, and the like.

Specifically, an organic light emitting material solution is dropped on the first electrode 220 in each of the first to third pixel regions P1 to P3, and the organic light emitting material solution is dried to form an organic light emitting layer 270a, 270b, 270c.

Since the bank 250 is hydrophobic, the bank 250 can be used as a partition wall to prevent the organic light-emitting material solution dripping in the first to third pixel regions P1 to P3 from being mixed.

In addition, the data line 215 is arranged at the boundary portions B1 and B2 between the first to third pixel regions P1 to P3, and the power line is arranged below the first to third pixel regions P1 to P3. Therefore, the width of the first boundary portion B1 is the same as the width of the second boundary portion B2, and the width of the bank 250 in the first boundary portion B1 is also the same as the width of the bank 250 in the second boundary portion B2.

When the widths of the first boundary portion B1 and the second boundary portion B2 are the same, the amounts of the organic light emitting material solutions in the short axis (parallel direction) in the first to third pixel regions P1 to P3 are the same as each other.

Thereby, during the process of drying the organic light emitting material solution, the evaporation rates of the solvent molecules of the organic light emitting material solution on the short axis in the first to third pixel regions P1 to P3 can be the same as each other.

In addition, after the drying process, the thicknesses of the organic light emitting layers 270a, 270b, and 270c on the short axis in the first to third pixel regions P1 to P3 can be uniform.

Therefore, it is possible to avoid degradation of OLED display quality, reduction of light emission efficiency, and shortening of OLED lifetime.

Example 3

FIG. 7 is a plan view showing an OLED according to a third embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7.

The OLED of the third embodiment is similar to those of the first and second embodiments, but in this embodiment, a structure that emits the same color in pixel regions in the same vertical row is further described.

The descriptions similar to the first and second embodiments are omitted here, and for convenience of explanation, the gate line, the data line, the power supply line, and the like are not shown in the figure.

In the OLED of this embodiment, pixel regions emitting the same color are arranged on the same vertical line. For example, the first pixel region P1 located in the first vertical row emits red light, the second pixel region P2 located in the second vertical row emits green light, and the third pixel region P3 located in the third vertical row emits blue light. The first pixel region P1, the second pixel region P2, and the third pixel region P3 are alternately arranged on each row.

A bank 350 may be formed between adjacent pixel regions on each row.

In this embodiment, at least two adjacent pixel regions on each vertical pixel region form a pixel group. Here, in each pixel group, the boundary portion between adjacent pixel regions is not provided with a bank, and the bank 350 is provided on the boundary portion between adjacent pixel groups.

The figure uses the first pixel region P1 as an example for illustration. Every two adjacent first pixel regions P1 form each pixel group PG, and bank 350 is not formed between adjacent first pixel regions P1 in the pixel group PG, but is formed in adjacent first pixel groups. Between PG, that is, the bank 350 is formed in the first pixel region P1 outside the first pixel group PG1 and the second pixel group PG2 (adjacent to the first pixel region P1 outside the first pixel group PG1 ) Between the first pixel regions P1. In other words, on each vertical line, the bank 350 is formed by at least two pixel regions.

By forming a bank 350 having a pixel group PG composed of at least two pixel regions on each vertical row, the bank 350 surrounds each pixel group PG, so that each of the first, red, green, and blue light emitting The second and third organic light emitting layers 370a, 370b, and 370c are formed corresponding to each pixel group PG, respectively.

For example, the pixel group PG that emits red light is surrounded by the bank 350 portion on both sides of the vertical row (ie, upper and lower sides) and the bank 350 portion on both sides of the row (ie left and right), and the first The light-emitting base layer 370a is formed in the bank 350 surrounding the pixel group that emits red light.

Therefore, the number of bank portions (ie, bank patterns) provided on the vertical lines can be reduced, and the area of a single region of the organic light emitting layer formed corresponding to each pixel group PG can be increased.

Therefore, the uniformity of the thickness of the organic light emitting layer can be improved by the present invention, and at the same time, the efficiency of forming the organic light emitting layer can be improved.

This section will be compared with the next preferred embodiment where banks are formed in each pixel region.

FIG. 9 is a plan view showing the OLED of the second preferred embodiment, and FIG. 10 is a cross-sectional view taken along line X-X in FIG. 9.

In the next preferred embodiment, since banks 450 are formed between adjacent pixel regions on each vertical row, each of the first to third organic light emitting layers 470a, 470b, and 470c is formed corresponding to each pixel region. .

Compared with this embodiment, the OLED of the next-best embodiment has more bank patterns on each vertical row, and therefore, a single area and an area of each organic light-emitting layer formed in the pixel area become smaller.

Therefore, the thickness distribution pattern of the organic light emitting layer is generated in each pixel region. In other words, this distribution pattern in which the thickness of the organic light emitting layer near the bank 450 is higher than the thickness of the organic light emitting layer in the pixel region is generated in each pixel region.

Conversely, in this embodiment, the thickness distribution pattern of the organic light emitting layer is generated in each pixel group composed of a plurality of pixel regions. Therefore, compared with the second preferred embodiment, the present invention can greatly improve the thickness uniformity of the organic light emitting layer.

In addition, as far as the organic luminescent material solution is ejected through the nozzle 510 of a nozzle 500, in the next preferred embodiment, the nozzle 510 must be ejected for each pixel region. Therefore, the nozzle 510 located in the corresponding pixel region will be used. However, the nozzles 510a located between the pixel regions are not used, so the use efficiency of the nozzles 510 is reduced. On the other hand, the number of nozzles 510 used is limited so that the amount of solution ejected is not the desired amount, so speckle defects may occur.

In contrast, in this embodiment, the ejection is for each pixel group. Therefore, compared with the next-best embodiment, the number of nozzles 510 used is increased, and the number of nozzles 510a not used is decreased. because Therefore, the use efficiency of the nozzle 510 is increased, and a required amount of solution can be ejected, thereby avoiding speckle defects.

In addition, in this embodiment, in order to keep the first electrodes 320 in adjacent pixel regions in the same pixel group PG insulated, an insulation pattern 340 may be formed. The insulating pattern 340 may be formed of an inorganic insulating material, such as silicon oxide and silicon nitride. The insulation pattern 340 may be formed between adjacent first electrodes 320 and cover an edge portion of the first electrodes 320. In addition, the insulating pattern 340 may be formed between the first electrodes 320 adjacent to each other in the horizontal row.

In addition, the patterns in the first and second embodiments can be applied to the OLED in this embodiment. For example, in this embodiment, the power line may be arranged in parallel with the gate line in the horizontal direction. Thereby, the thickness uniformity of the organic light emitting layer can be further improved.

On the other hand, the types of related conventional technologies can also be applied to the OLED of this embodiment. In other words, in this embodiment, the power cord can be arranged in a vertical manner. In this case, since the bank 350 is set according to the pixel group PG, the thickness uniformity of the organic light emitting layer can be improved compared to the conventional technology.

Example 4

FIG. 11 is a plan view showing an OLED according to a fourth embodiment of the present invention, and FIG. 12 is a cross-sectional view taken along line XII-VII in FIG. 11.

The OLED of the fourth embodiment is similar to those of the first, second, or third embodiments, but in this embodiment, a structure that emits the same color in pixel regions in the same vertical row is further described.

Explanations similar to those of the first, second, or third embodiments are omitted here, and for convenience of explanation, the gate lines, data lines, and power lines are not shown in the figure.

In the OLED of this embodiment, pixel regions emitting the same color are arranged on the same vertical line. For example, the first pixel region P1 located in the first vertical row emits red light, the second pixel region P2 located in the second vertical row emits green light, and the third pixel region P3 located in the third vertical row emits blue light. The first pixel region P1, the second pixel region P2, and the third pixel region P3 are alternately arranged on each row.

A bank 550 may be formed between adjacent pixel regions on each row.

In this embodiment, the bank 550 between adjacent pixel regions on each vertical row may form a stepped structure.

The figure uses the first pixel region P1 as an example for illustration. The bank 550 located between two adjacent first pixel regions P1 includes a first portion 551 and a second portion 552, and the second portion 552 is located on two sides in the longitudinal direction of the first portion 551. The thickness of the second portion 552 is smaller than that of the first portion 551.

Thereby, the first portion 551 has a convex structure upward, so that the thickness of the second portion 552 is small, and the bank 550 forms a stepped structure on both sides in the longitudinal direction in the first pixel region P1.

When the bank 550 has a stepped structure, the first organic light emitting layer 570a in the first pixel region P1 may further extend to cover the second portion 552 located on both sides of the first pixel region P1 in the longitudinal direction. The region where the first organic light emitting layer 570a is formed in the region P1 may be expanded in the longitudinal direction.

Therefore, the unit area for forming the organic light emitting layer can be increased compared to the case where the bank with a stepped structure is not used, and therefore, the problem of the thickness uniformity of the organic light emitting layer can also be improved.

In addition, the patterns in the first and second embodiments can be applied to the OLED in this embodiment. For example, in this embodiment, the power line may be arranged in parallel with the gate line in the horizontal direction. Thereby, the thickness uniformity of the organic light emitting layer can be further improved.

On the other hand, the types of related conventional technologies can also be applied to the OLED of this embodiment. In other words, in this embodiment, the power cord can be arranged in a vertical manner. In this case, since the bank 550 is formed with a stepped structure, the thickness consistency of the organic light emitting layer can be improved compared to the conventional technology.

Anyone skilled in this art can make some changes and retouches in the display device of the present invention without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention includes these changes and retouches, and the attached application What is defined by the patent scope and its equivalent shall prevail.

The present invention claims the priority of Korean Invention Patent Application Nos. 10-2015-0189787 and 10-2016-0162704, which were filed on December 30, 2015 and December 1, 2016, respectively. These Korean invention patent applications All of the contents are used in this case.

Claims (25)

An organic light emitting diode display device includes: a substrate including at least three pixel regions arranged in a horizontal direction; a first electrode disposed in each pixel region on the substrate; and a bank surrounding each one A pixel region; and a power line arranged in a horizontal direction below each pixel region on the substrate and applying a driving voltage to each pixel region, wherein each of the at least three pixel regions Or the banks on the different boundary parts have the same width. The organic light-emitting diode display device according to item 1 of the patent application scope, wherein the driving voltage is applied from two ends of the power line. The organic light emitting diode display device according to item 1 of the scope of patent application, further comprising: a gate line disposed on the substrate in a horizontal direction; and a data line interlaced with the gate line, wherein, the The power line and the gate line are formed in the same layer with the same material. The organic light-emitting diode display device described in item 1 of the scope of patent application, further includes an auxiliary electrode, the auxiliary electrode is spaced apart from the first electrode, and is electrically connected to the power line. The organic light emitting diode display device according to item 4 of the scope of patent application, further comprising: a gate line arranged on the substrate in a horizontal direction and formed in the same layer as the power line; a data line, Interleaved with the gate line, a gate insulation layer is disposed on the gate line and the power line; and a planarization layer is disposed on the gate insulation layer, wherein the data line is disposed on the gate insulation Between the layer and the planarization layer, and the first electrode is disposed on the planarization layer. The organic light emitting diode display device according to item 5 of the scope of patent application, wherein the gate insulating layer and the planarization layer include a contact hole to expose a part of the power line, and the power line passes through The contact hole is connected to the auxiliary electrode. The organic light emitting diode display device according to item 1 of the scope of patent application, further comprising an organic light emitting layer disposed on the first electrode. The organic light-emitting diode display device according to item 7 of the scope of patent application, wherein the organic light-emitting layer is laminated by a solution process. An organic light-emitting diode display device includes a substrate including a plurality of gate lines and a plurality of data lines interlaced with each other, and a horizontal direction and located at a position where the gate lines and the data lines are intersected with each other. At least three pixel regions; a first electrode disposed in each pixel region on the substrate; a bank surrounding each pixel region; and a power line parallel to the gate line and for each pixel A driving voltage is applied to the regions, wherein the banks on each or different boundary portions between the at least three pixel regions have the same width. The organic light-emitting diode display device according to item 9 of the scope of patent application, wherein the driving voltage is applied from two ends of the power line. The organic light-emitting diode display device according to item 9 of the scope of the patent application, wherein the power line and the gate line are formed in the same layer with the same material. The organic light emitting diode display device according to item 9 of the scope of the patent application, further comprising an auxiliary electrode, the auxiliary electrode is spaced apart from the first electrode, and is electrically connected to the power line. The organic light emitting diode display device according to item 12 of the scope of patent application, further comprising: a gate insulating layer provided on the gate line and the power line; and a planarization layer provided on the gate insulation Layer, wherein the data line is disposed between the gate insulating layer and the planarization layer, and the first electrode is disposed on the planarization layer. The organic light-emitting diode display device according to item 13 of the scope of patent application, wherein the gate insulating layer and the planarization layer include a contact hole to expose a part of the power line, and the power line passes through The contact hole is connected to the auxiliary electrode. The organic light emitting diode display device according to item 9 of the scope of patent application, further comprising an organic light emitting layer disposed on the first electrode. The organic light-emitting diode display device according to item 15 of the scope of patent application, wherein the organic light-emitting layer is laminated by a solution process. An organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of longitudinal directions, the pixel regions in the same vertical row emitting the same color; a first electrode provided on the substrate In each pixel region above; a bank surrounding each pixel group, the pixel group consisting of two or more adjacent pixel regions on the same vertical row; an organic light emitting layer disposed on the first electrode And corresponds to each pixel group; a data line is arranged in the longitudinal direction; a gate line is arranged in the horizontal direction; and a power line is parallel to the gate line, wherein the emission is in the same horizontal direction The banks on different boundary portions between pixel regions of different colors have the same width. The organic light emitting diode display device according to item 17 of the scope of the patent application, further comprising an auxiliary electrode, the auxiliary electrode is spaced apart from the first electrode, and is electrically connected to the power line. The organic light-emitting diode display device according to item 17 of the scope of patent application, further comprising an insulation pattern disposed between adjacent pixel regions in each pixel group and covering each of the pixel groups in the pixel group. An edge portion between adjacent pixel regions. The organic light-emitting diode display device according to item 17 of the scope of patent application, wherein the organic light-emitting layer is laminated by a solution process. An organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of longitudinal directions, the pixel regions in the same vertical row emitting the same color; a first electrode provided on the substrate In each pixel region above; a bank surrounding each pixel group, the pixel group consisting of two or more adjacent pixel regions on the same vertical row; an organic light emitting layer disposed on the first electrode And corresponds to each pixel group; a data line is set in the longitudinal direction; a gate line is set in the horizontal direction; and a power line is parallel to the data line, where different emission in the same horizontal direction The banks on the different boundary portions between the pixel regions of the color have the same width. An organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of longitudinal directions, the pixel regions in the same vertical row emitting the same color; a first electrode provided on the substrate In each of the pixel regions above; a bank is provided between adjacent pixel regions in each vertical row, the bank includes at least a first part and a second part extending from both sides of the first part; The thickness is less than the thickness of the first portion; an organic light emitting layer is disposed on the first electrode and the second portions; a data line is disposed in a longitudinal direction; a gate line is disposed in a horizontal direction; and The power lines are parallel to the gate lines, and the banks on different boundary portions between pixel regions emitting different colors in the same row direction have the same width. The organic light-emitting diode display device according to item 22 of the scope of the patent application, further includes an auxiliary electrode, the auxiliary electrode is spaced apart from the first electrode, and is electrically connected to the power line. The organic light-emitting diode display device according to item 22 of the scope of patent application, wherein the organic light-emitting layer is laminated by a solution process. An organic light emitting diode display device includes: a substrate including a plurality of pixel regions arranged in a plurality of longitudinal directions, the pixel regions in the same vertical row emitting the same color; a first electrode provided on the substrate In each of the pixel regions above; a bank is provided between adjacent pixel regions in each vertical row, the bank includes at least a first part and a second part extending from both sides of the first part; The thickness is less than the thickness of the first portion; an organic light emitting layer is disposed on the first electrode and the second portions; a data line is disposed in a longitudinal direction; a gate line is disposed in a horizontal direction; and The power lines are parallel to the data lines, wherein the banks on different boundary portions between pixel regions emitting different colors in the same row direction have the same width.