Display panel, method for manufacturing display panel, and display device

Patent metadata

Field	Value
Publication number	US-2022397784-A1
Application number	US-202017612090-A
Country	US
Kind code	A1
Filing date	Dec 25, 2020
Priority date	Dec 25, 2020
Publication date	Dec 15, 2022
Grant date	—

Abstract

The present disclosure discloses a display panel, a method for manufacturing a display panel, and a display device, and belongs to the field of liquid crystal display technologies. The display panel includes an array substrate, a counter substrate, and a liquid crystal layer between the array substrate and the counter substrate. For the array substrate, a diffuse reflection layer is sequentially laminated on the array substrate. The array substrate includes a first base substrate, and a thin film transistor array, a diffuse reflection layer, and a first planarization layer that are laminated on the first base substrate. A surface of the diffuse reflection layer proximal to the first planarization layer is a reflection surface that has a plurality of protrusion structures, the protrusion structures are configured to diffusely reflect light irradiated on the reflection surface. Based on this structure, the first planarization layer may separate the protrusion structure from the liquid crystal layer to prevent the protrusion structure from affecting the driving effect of the liquid crystal layer. In this way, the problem in the related art regarding the poor display effect of the display panel is solved and thus the display effect of the display panel is improved.

First claim

1 . A display panel, comprising: an array substrate, a counter substrate, and a liquid crystal layer between the array substrate and the counter substrate; wherein
the array substrate comprises a first base substrate, and a thin film transistor array, a diffuse reflection layer, and a first planarization layer that are laminated on the first base substrate, wherein a surface, proximal to the first planarization layer, of the diffuse reflection layer is a reflection surface, the reflection surface being provided with a plurality of protrusion structures, the protrusion structures being configured to diffusely reflect light irradiated on the reflection surface.

2 . The display panel according to claim 1 , wherein the array substrate further comprises a plurality of support blocks between the diffuse reflection layer and the first base substrate, wherein the plurality of support blocks are disposed in orthographic projections of the plurality of protrusion structures on the first base substrate in one-to-one correspondence with the plurality of protrusion structures.

3 . The display panel according to claim 2 , wherein the thin film transistor array comprises a plurality of thin film transistors arranged in an array on the first base substrate, wherein the thin film transistor comprises a first electrode, a second electrode, and a third electrode configured to control connection or disconnection between the first electrode and the second electrode; and
the support block and the first electrode in the thin film transistor are disposed in a same layer.

4 . The display panel according to claim 3 , wherein the array substrate further comprises a support plate on which the plurality of support blocks are disposed.

5 . The display panel according to claim 4 , wherein the support plate and the third electrode in the thin film transistor are disposed in a same layer.

6 . The display panel according to claim 1 , wherein the protrusion structure is a cambered protrusion structure, and a ratio of a diameter of the protrusion structure to a height of the protrusion structure in a direction perpendicular to the first base substrate satisfies 3:1 to 15:1.

7 . The display panel according to claim 6 , wherein the protrusion structure is formed by melting and cooling a columnar protrusion.

8 . The display panel according to claim 1 , wherein
an orthographic projection of the protrusion structure on the first base substrate is square, and the orthographic projections of the plurality of protrusion structures on the first base substrate are arranged in rows and columns.

9 . The display panel according to claim 1 , wherein
the display panel further comprises a first electrode layer on a side, proximal to the first planarization layer, of the liquid crystal layer, and a second electrode layer on a side, distal from the first planarization layer, of the liquid crystal layer; and the display panel further comprises a plurality of spacers comprising a first spacer, wherein an end of the first spacer abuts against the second electrode layer, and another end passes through the liquid crystal layer and abuts against the first electrode layer.

10 . The display panel according to claim 9 , wherein
the thin film transistor array comprises a plurality of thin film transistors arranged in an array on the first base substrate, wherein the thin film transistor comprises a first electrode, a second electrode, and a third electrode configured to control connection or disconnection between the first electrode and the second electrode; and the first planarization layer is provided with a first through hole through which the first electrode layer is electrically connected to the first electrode, and an orthographic projection of the another end of the first spacer on the first planarization layer is disposed at the first through hole.

11 . The display panel according to claim 10 , wherein the diffuse reflection layer comprises a protrusion structure layer and a metal reflection layer covering the protrusion structure layer, wherein the protrusion structure layer is provided with a second through hole through which the metal reflection layer is electrically connected to the first electrode, and through which the first electrode layer is electrically connected to the metal reflection layer.

12 . The display panel according to claim 9 , wherein
the counter substrate comprises a second base substrate, and a third planarization layer and the second electrode layer laminated on a side, proximal to the liquid crystal layer, of the second base substrate; and the counter substrate further comprises an adhesive structure, and the second electrode layer is provided with at least one opening in which the adhesive structure is disposed.

13 . The display panel according to claim 1 , wherein the liquid crystal layer comprises ferroelectric liquid crystal.

14 . The display panel according to claim 1 , wherein
the thin film transistor array comprises a plurality of thin film transistors arranged in an array on the first base substrate; and the array substrate further comprises a second planarization layer between the plurality of thin film transistors and the diffuse reflection layer.

15 . The display panel according to claim 1 , wherein
the protrusion structure is a spherical protrusion structure, and a ratio of a diameter to a radius of the protrusion structure satisfies 1.3:1 to 1.6:1; the display panel further comprises a plurality of support blocks between the diffuse reflection layer and the first base substrate, wherein the plurality of support blocks are disposed in orthographic projections of the plurality of protrusion structures on the first base substrate in one-to-one correspondence with the plurality of protrusion structures; the thin film transistor array comprises a plurality of thin film transistors arranged in an array on the first base substrate, wherein the thin film transistor comprises a first electrode, a second electrode, and a third electrode configured to control connection or disconnection between the first electrode and the second electrode, and the support block and the first electrode in the thin film transistor are disposed in a same layer; an orthographic projection of the protrusion structure on the first base substrate is square, and the orthographic projections of the plurality of protrusion structures on the first base substrate are arranged in rows and columns; the display panel further comprises a first electrode layer on a side, proximal to the first planarization layer, of the liquid crystal layer, and a second electrode layer on a side, distal from the first planarization layer, of the liquid crystal layer; the display panel further comprises a plurality of spacers comprising a first spacer, wherein an end of the first spacer abuts against the second electrode layer, and another end passes through the liquid crystal layer and abuts against the first electrode layer; and the first planarization layer is provided with a first through hole through which the first electrode layer is electrically connected to the first electrode, and an orthographic projection of the another end of the first spacer on the first planarization layer is disposed at the first through hole.

16 . A method for manufacturing a display panel, comprising:
acquiring an array substrate; and forming a display panel comprising the array substrate, a liquid crystal layer, and a counter substrate; wherein the array substrate comprises a first base substrate, and a thin film transistor array, a diffuse reflection layer

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Yang Song
• Liang Pengxia
• Zhang Shiyu
• Han Jiahui
• Shi Ge
• Sun Yanliu
• Fang Zheng
• Li Hongpeng
• Choi Hyunsic
• Zhang Zhenyu

Classifications

• G02F1/1368 Primary

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/141

  using ferroelectric liquid crystals · CPC title

• H01L27/1251

  Electricity · mapped topic

• H01L27/127

  Electricity · mapped topic

• H10D86/471

  having different architectures, e.g. having both top-gate and bottom-gate TFTs · CPC title