Display substrate and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-11329114-B2
Application number	US-201916767425-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Mar 11, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A display substrate and a manufacture method thereof are provided. The display substrate includes a pixel definition layer and a controllable deformation layer; the pixel definition layer includes a plurality of openings for defining a plurality of pixel units; and the controllable deformation layer is on the pixel definition layer, and a horizontal extension of at least a portion of the controllable deformation layer in a direction parallel to the pixel definition layer is controllable. The organic functional layer of the display substrate has uniform morphology, so the display substrate has better display effect.

First claim

What is claimed is:

1. A display substrate, comprising:
a pixel definition layer, comprising a plurality of openings for defining a plurality of pixel units; and
a controllable deformation layer on the pixel definition layer, a horizontal extension of at least a portion of the controllable deformation layer in a direction parallel to the pixel definition layer being controllable,
wherein the horizontal extension is realized by irradiating the controllable deformation layer with first light, and
wherein the horizontal extension is withdrawn by removing the first light or irradiating the controllable deformation layer with second light, wherein a wavelength range of the second light is different from a wavelength range of the first light.

2. The display substrate according to claim 1 , wherein, after the controllable deformation layer extends horizontally, a cross section of the controllable deformation layer in a direction perpendicular to the pixel definition layer is an inverted trapezoid that is narrower on a side of the pixel definition layer.

3. The display substrate according to claim 1 , wherein a material of the controllable deformation layer comprises a photo-induced deformation material.

4. The display substrate according to claim 3 , wherein the photo-induced deformation material comprises azobenzene, benzospiropyran, copolymer containing cinnamic acid groups, or polyethylene polymer.

5. The display substrate according to claim 1 , wherein a thickness of the controllable deformation layer is ranged from 0.5 μm to 1.5 μm.

6. A manufacturing method of a display substrate, comprising:
forming a pixel definition layer, the pixel definition layer comprising a plurality of openings for defining a plurality of pixel units;
forming a controllable deformation layer on the pixel definition layer, a horizontal extension of at least a portion of the controllable deformation layer in a direction parallel to the pixel definition layer being controllable;
applying a first control to the controllable deformation layer, so that the controllable deformation laver extends horizontally along a direction towards the plurality of openings; and
controlling the controllable deformation layer to withdraw the horizontal extension of the controllable deformation layer,
wherein the first control is first light irradiation, and the controlling the controllable deformation layer to withdraw the horizontal extension of the controllable deformation layer comprises:
removing the first light irradiation or applying second light irradiation to the controllable deformation layer, a wavelength range of the second light irradiation being different from a wavelength range of the first light irradiation.

7. The manufacturing method according to claim 6 , further comprising:
filling the plurality of openings with a liquid material; and
drying the liquid material, and at the same time applying the first control to the controllable deformation layer.

8. The manufacturing method according to claim 7 , wherein after the drying the liquid material,
controlling the controllable deformation layer to withdraw the horizontal extension of the controllable deformation layer.

9. The manufacturing method according to claim 8 , wherein the applying the first control to the controllable deformation layer comprises:
controlling a size of the horizontal extension of the controllable deformation layer by changing at least one of a duration and an intensity of the first control.

10. The manufacturing method according to claim 9 , wherein a material of the controllable deformation layer is a photo-induced deformation material,
wherein the controlling the size of the horizontal extension of the controllable deformation layer by changing the at least one of the duration and the intensity of the first control comprises:
controlling the size of the horizontal extension of the controllable deformation layer by changing an irradiation duration, a light intensity, or both the irradiation duration and the light intensity of the first light irradiation.

11. The manufacturing method according to claim 10 , wherein the first light irradiation is ultraviolet light irradiation and the second light irradiation is visible light irradiation.

12. The manufacturing method according to claim 10 , wherein the light intensity of the first light irradiation is ranged from 20 mw/cm 2 to 200 mw/cm 2 , and the irradiation duration is ranged from 5 s to 35 s.

13. A display substrate, comprising:
a pixel definition layer, comprising a plurality of openings for defining a plurality of pixel units; and
a controllable deformation layer on the pixel definition layer, a horizontal extension of at least a portion of the controllable deformation layer in a direction parallel to the pixel definition layer being controllable,
wherein a material of the controllable deformation layer comprises a magnetostrictive material.

14. The display substrate according to claim 13 , wherein the controllable deformation layer comprises a resin polymer material containing terbium-dysprosium-iron rare earth giant magnetostrictive particles.

15. The display substrate according to claim 13 , wherein the horizontal extension is realized by applying a magnetic field to the controllable deformation layer.

16. The display substrate according to claim 15 , wherein the horizontal extension is withdrawn by removing the magnetic field applied to the controllable deformation layer.

17. A manufacturing method of the display substrate according to claim 13 , the method comprising:
forming the pixel definition layer, the pixel definition layer comprising the plurality of openings for defining the plurality of pixel units; and
forming the controllable deformation layer on the pixel definition layer, the horizontal extension of at least the portion of the controllable deformation layer in the direction parallel to the pixel definition layer being controllable,
wherein the material of the controllable deformation layer comprises the magnetostrictive material.

18. The manufacturing method according to claim 17 , further comprising:
applying a first control to the controllable deformation layer, so that the controllable deformation layer extends horizontally along a direction towards the plurality of openings,
wherein the first control is a magnetic field.

19. The manufacturing method according to claim 18 , further comprising:
controlling the controllable deformation layer to withdraw the horizontal extension of the controllable deformation layer,
wherein the controlling the controllable deformation layer to withdraw the horizontal extension of the controllable deformation layer comprises:
removing the magnetic field.

20. The manufacturing method according to claim 18 ,
wherein the applying the first control to the controllable deformation layer comprises:
controlling a size of the horizontal extension of the controllable deformation layer by changing at least one of a duration and an intensity of the first control,

wherein the controlling the size of the horizontal extension of the controllable deformation layer by changing the at least one of the duration and the intensity of the first control comprises:
controlling the size of the horizontal extension of the controllable deformation layer by changing an acting duration of the magnetic field, an intensity of the magnetic field, or both the acting duration and the intensity of the magnetic field,
wherein the intensity of the magnetic field i

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Zhu Ruhui
• Yao Gu

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H01L51/56

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/50 Primary

  OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements · CPC title