CN-122003031-A - Display device

Abstract

The invention discloses a display device. The display device according to the present disclosure may include a substrate including a display region and a non-display region, at least two light emitting regions disposed on the display region and constituting one sub-pixel, a trench portion disposed at least outside each light emitting region, at least two contact regions disposed to be spaced apart from the corresponding light emitting region, a first electrode disposed in each light emitting region, a contact wiring portion disposed in each contact region, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer and separated in the two light emitting regions by the trench portion, and the separated portions of the second electrode may be electrically connected to the contact wiring portions, respectively.

Inventors

• XU JUNYING

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260508

Application Date

20250804

Priority Date

20241108

Claims (17)

1. 1. A display device, comprising: A substrate including a display region and a non-display region; At least two light emitting regions disposed on the display region and constituting one sub-pixel; A groove portion provided at least outside each light emitting region; At least two contact regions disposed spaced apart from the respective light emitting regions; A first electrode disposed in each of the light emitting regions; A contact wiring portion provided in each contact region; a light emitting layer disposed on the first electrode, and A second electrode provided on the light emitting layer and separated in the two light emitting regions by the groove portion, Wherein the divided portions of the second electrodes are electrically connected to the contact wiring portions, respectively.
2. 2. The display device according to claim 1, wherein the at least two light emitting regions include a first-first subpixel and a first-second subpixel that emit light of the same color.
3. 3. The display device according to claim 1, wherein a portion of a surface of the contact wiring portion is exposed, and the divided portions of the second electrode contact the entire surface of the exposed portion of the contact wiring portion, respectively.
4. 4. The display device according to claim 2, wherein the substrate further comprises a transistor, a planarizing layer covering the transistor, and a connection electrode provided over the planarizing layer and electrically connected to the transistor, and Wherein the first-first subpixel and the first-second subpixel are electrically connected to the transistor through the connection electrode.
5. 5. The display device of claim 4, further comprising a protective layer disposed on the planarization layer, Wherein the trench portion includes a bottom surface recessed in a thickness direction of the protective layer, and opposite side walls extending from the bottom surface, and Wherein the protective layer comprises an inorganic insulating material.
6. 6. The display device according to claim 4, further comprising a step difference planarization layer disposed on the planarization layer, Wherein the trench portion includes a bottom surface recessed in a thickness direction of the step difference planarization layer, and opposite side walls extending from the bottom surface, and The step difference planarization layer exposes a portion of the surface of the connection electrode.
7. 7. The display device according to claim 1, wherein a plurality of light emitting regions are arranged on the substrate in a plurality of row directions and a plurality of column directions, Wherein light emitting regions emitting light of different colors are alternately arranged in the plurality of row directions and the plurality of column directions, and Wherein at least two light emitting regions constituting the one sub-pixel are arranged in one column direction.
8. 8. The display device according to claim 1, wherein the display region includes a plurality of transmissive regions and a plurality of pixel regions, the pixel regions include a plurality of light emitting regions, and the transmissive regions do not overlap the plurality of light emitting regions.
9. 9. The display device according to claim 1, further comprising a bank provided in the light emitting region and the contact region, the bank covering edges of each of the light emitting region and the contact region and having an end portion protruding more than a side wall of the trench portion.
10. 10. The display device of claim 1, further comprising a structure disposed within the channel portion, Wherein, the structure includes: A lower pattern including the light emitting layer, and An upper pattern disposed on the lower pattern and including the second electrode.
11. 11. The display device according to claim 6, further comprising a plurality of protruding patterns which are provided on the same plane as the first electrode and the contact wiring portion, and which have ends protruding more than the side walls of the groove portion.
12. 12. The display device according to claim 11, further comprising a bank provided in the light emitting region and the contact region, the bank having an end portion protruding more than the side wall of the trench portion while covering the plurality of protruding patterns.
13. 13. The display device according to claim 9, wherein the bank is provided on a bottom surface of the trench portion and the side wall and includes an inorganic insulating material.
14. 14. The display device of claim 1, further comprising a structure disposed within the channel portion, Wherein, the structure includes: A lower pattern including the light emitting layer, and An upper pattern including the second electrode while covering an upper surface and sidewalls of the lower pattern.
15. 15. The display device according to claim 14, wherein the structure has a rectangular ring shape having a space portion provided inside when viewed in a plan view.
16. 16. The display device according to claim 1, wherein the second electrode is provided in two adjacent light emitting regions so as to be separated at opposite sides, wherein the groove portion is interposed between the two adjacent light emitting regions.
17. 17. The display device according to claim 10 or 14, wherein the lower pattern is provided on a bottom surface of the groove portion, not provided on a side wall of the groove portion.

Description

Display device Technical Field The present disclosure relates to a display device. Background The display device is suitable for various electronic apparatuses such as a TV, a smart phone, a laptop computer, and a tablet computer. For this reason, a series of researches have been conducted to develop a display device that is thinner, lighter, and has lower power consumption. Among various display devices that display information as an image, an Organic Light Emitting Display (OLED) device is a self-luminous element that emits light by itself without an external light source. The organic light emitting display device has advantages such as a fast response speed, high light emitting efficiency, high brightness, a large viewing angle, high contrast, and excellent color reproducibility. With the recent increase in demand for high-resolution display devices, the application range of organic light emitting display devices is expanding. Disclosure of Invention In the manufacturing process of the organic light emitting display device, a phenomenon in which the brightness of the display region is lowered may occur. One of the reasons for the phenomenon of the decrease in luminance in the display area may be that a dark spot locally occurs in a subpixel disposed on the display area, thereby increasing a non-light emitting area. The dark spots may be caused by defective sub-pixels that cannot emit light. The defective sub-pixel may be caused by, for example, an unnecessary reaction caused by an impact from the outside of the display device, a gas generated inside the display device, or the like, or damage to the light emitting layer containing an organic material caused by moisture or oxygen. Even if dark spots occur in some parts of the display area, the dark spots may reduce the image quality provided over the entire display area, thereby reducing user immersion and reducing reliability of the display device. To overcome the above-described drawbacks, the inventors of the present disclosure have invented a display device capable of driving a defective sub-pixel into a normal sub-pixel through various experiments. An object to be achieved according to an embodiment of the present disclosure is to provide a display device capable of driving a defective sub-pixel as a normal sub-pixel. In addition, an object to be achieved according to an embodiment of the present disclosure is to provide a display device whose yield can be improved by easily removing dark spots from defective sub-pixels without using laser processing. The objects to be achieved according to the embodiments of the present disclosure are not limited to the above objects, and other objects and advantages of the present disclosure, which are not mentioned, may be understood from the following description, and may be more clearly understood in accordance with the embodiments of the present disclosure. Furthermore, it will be readily understood that the objects and advantages of the present disclosure may be realized by the means presented in the claims, and combinations thereof. The display device according to an embodiment of the present disclosure may include a substrate including a display region and a non-display region, at least two light emitting regions disposed on the display region and constituting one sub-pixel, a trench portion disposed at least outside each light emitting region, at least two contact regions disposed to be spaced apart from the corresponding light emitting region, a first electrode disposed in each light emitting region, a contact wiring portion disposed in each contact region, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer and separated in the two light emitting regions by the trench portion, and the separated portions of the second electrode may be electrically connected to the contact wiring portions, respectively. According to embodiments of the present disclosure, a subpixel that emits light of one color may include a pair of subpixels. With this configuration, even if a defect occurs in one of the pair of sub-pixels, the remaining sub-pixels of the pair of sub-pixels can emit light, so that the corresponding sub-pixels can be used as normal sub-pixels. By providing a cathode electrode and a cathode contact separated from each other by a groove, a protruding pattern, or the like such that one cathode electrode is connected to each sub-pixel, a pair of sub-pixels emitting light of one color can be supplied with power voltages, respectively. Therefore, even if one of a pair of sub-pixels emitting light of one color is defective and does not emit light, its normal operation can be achieved by supplying a power voltage to the other sub-pixel. Accordingly, the corresponding sub-pixel can operate normally. Therefore, according to the embodiments of the present disclosure, repair processing by laser cutting or the like can be omitted, thereby optimizing processi