Display substrate, its manufacturing method and display device

Patent metadata

Field	Value
Publication number	US-2016359112-A1
Application number	US-201514894003-A
Country	US
Kind code	A1
Filing date	Apr 21, 2015
Priority date	Dec 26, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

The present disclosure relates to the field of display technology, and provides a display substrate, its manufacturing method, and a display device. Pixel partition walls of the display substrate include first pixel partition walls for defining first pixel regions and second pixel partition walls for defining second pixel regions. Each first pixel partition wall is of a height greater than each second pixel partition wall, and a plurality of adjacent second pixel regions is located at an identical first pixel region.

First claim

What is claimed is:

1 . A method for manufacturing a display substrate, comprising steps of:
forming pixel partition walls for defining pixel regions of the display substrate; and forming display layers at the pixel regions by inkjet printing, wherein the step of forming the pixel partition walls comprises: forming first pixel partition walls for defining first pixel regions and second pixel partition walls for defining second pixel regions, each first pixel partition wall being of a height greater than each second pixel partition wall, and a plurality of adjacent second pixel regions being located within an identical first pixel region, and the step of forming the display layers at the pixel regions by inkjet printing comprises: inkjet printing an identical material at each first pixel region by at least one nozzle, so as to form the identical display layer at the plurality of second pixel regions within the first pixel region, the display layer being of a thickness greater than the height of each second pixel partition wall.

2 . The method according to claim 1 , wherein the first pixel regions are each of a strip-like shape and arranged in a matrix form.

3 . The method according to claim 1 or 2 , wherein a short side of each first pixel region extends in a row direction, the identical material is inkjet-printed at all the first pixel regions in an identical column simultaneously by a sprayer including a plurality of nozzles, and the sprayer is moved so as to inkjet print the corresponding material at the first pixel regions in all the columns.

4 . The method according to any one of claims 1 to 3 , wherein the identical material is inkjet-printed at each first pixel region by at least two nozzles.

5 . The method according to any one of claims 1 to 4 , wherein the step of forming the first pixel partition walls and the second pixel partition walls comprises:
forming patterns of first layers, the first layers being located at regions where the first pixel partition walls and the second pixel partition walls are located; and
forming patterns of second layers on the first layers, the second layers being located at regions where the first pixel partition walls are located.

6 . The method according to any one of claims 1 to 5 , wherein the display substrate is an organic light-emitting diode (OLED) display substrate or a color filter substrate of a liquid crystal panel.

7 . The method according to claim 6 , wherein when the display substrate is an OLED display substrate, an OLED for emitting a ray in a specific color is formed at each second pixel region,
the method further comprises: forming a bottom electrode of the OLED on a base substrate; forming the second pixel partition walls on the base substrate with the bottom electrode, the second pixel partition walls defining the second pixel regions; forming the first pixel partition walls on the base substrate with the second pixel walls, the first pixel partition walls defining the first pixel regions, and the plurality of adjacent second pixel regions being located at an identical first pixel region; and inkjet printing an identical material at the first pixel regions by at least one nozzle, so as to form the display layers for emitting rays in an identical color at the plurality of second pixel regions within each first pixel region, the display layers at the first pixel regions in adjacent columns emitting rays in different colors.

8 . The method according to claim 7 , wherein the display layer includes an organic light-emitting layer.

9 . A display substrate, comprising:
pixel partition walls for defining pixel regions of the display substrate, the pixel partition walls comprising first pixel partition walls for defining first pixel regions and second pixel partition walls for defining second pixel regions, each first pixel partition wall being of a height greater than each second pixel partition wall, a plurality of adjacent second pixel regions being located at an identical first pixel region; and an identical display layer formed at the plurality of second pixel regions within each first pixel region, the display layer being of a thickness greater than the height of each second pixel partition wall.

10 . The display substrate according to claim 9 , wherein the first pixel regions are each of a strip-like shape and arranged in a matrix form.

11 . The display substrate according to claim 9 or 10 , wherein a short side of each first pixel region extends in a row direction, and the display layers at the first pixel regions in an identical column are made of an identical material and formed by a single inkjet printing process.

12 . The display substrate according to any one of claims 9 to 11 , wherein each first pixel partition wall comprises a first layer and a second layer on the first layer, and each second pixel partition wall comprises the first layer.

13 . The display substrate according to claim 12 , wherein the first layer is of a thickness of 10 nm to 100 μm.

14 . The display substrate according to claim 12 or 13 , wherein the second layer is of a thickness of 100 nm to 100 μm.

15 . The display substrate according to any one of claims 12 to 14 , wherein the first layer and the second layer are each made of resin, organic silicon or silicon dioxide.

16 . The display substrate according to any one of claims 9 to 15 , wherein the display substrate is an organic light-emitting diode (OLED) display substrate, or a color filter substrate of a liquid crystal panel.

17 . The display substrate according to claim 16 , wherein when the display substrate is an organic light-emitting diode (OLED) display substrate, an OLED for emitting a ray in a specific color is arranged at each second pixel region, the display substrate comprises:
a bottom electrode of the OLED; the second pixel partition walls for defining the second pixel regions; and the first pixel partition walls for defining the first pixel regions, the plurality of adjacent pixel regions being located at an identical first pixel region, and wherein the display layers for emitting rays in an identical color are arranged at the plurality of second pixel regions within each first pixel region, and the display layers at the adjacent first pixel regions in adjacent columns emit rays in different colors.

18 . The display substrate according to claim 17 , wherein the display layer comprises an organic light-emitting layer.

19 . The display substrate according to any one of claims 9 to 18 , wherein three adjacent second pixel regions are located at an identical first pixel region.

20 . A display device comprising the display substrate according to any one of claims 9 to 19 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Huifeng
• Liu Ze

Classifications

• H10D84/01

  Manufacture or treatment · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H10D86/00

  Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates · CPC title

• H01L2227/323

  Electricity · mapped topic

• H01L51/5012

  Electricity · mapped topic