Liquid crystal display panel and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-12339531-B2
Application number	US-202218261263-A
Country	US
Kind code	B2
Filing date	Sep 7, 2022
Priority date	Sep 7, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A liquid crystal display panel is provided, including: a first substrate; a second substrate opposite to the first substrate; a liquid crystal layer between the first substrate and the second substrate; and a heating electrode layer on a side of the first substrate away from the second substrate. The heating electrode layer includes a plurality of heating electrodes respectively used to heat liquid crystals in the liquid crystal layer. The first substrate includes a first region and a second region, the first region is closer to a side edge of the first substrate than the second region. The plurality of heating electrodes include a first heating electrode in the first region and at least one second heating electrode in the second region, and a heating power of the first heating electrode is greater than a heating power of each of the at least one second heating electrode.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising:
a first substrate;
a second substrate opposite to the first substrate;
a liquid crystal layer between the first substrate and the second substrate; and
a heating electrode layer on a side of the first substrate away from the second substrate,
wherein the heating electrode layer comprises a plurality of heating electrodes respectively configured to heat liquid crystals in the liquid crystal layer;
wherein the first substrate comprises a first region and a second region, the first region being closer to a side edge of the first substrate than the second region, and the plurality of heating electrodes comprise a first heating electrode in the first region and at least one second heating electrode in the second region, a heating power of the first heating electrode being greater than a heating power of each of the at least one second heating electrode; and
wherein the first heating electrode comprises a loop-like electrode in the first region, and the second heating electrode comprises a strip-like electrode in the second region.

2. The liquid crystal display panel according to claim 1 , wherein the first substrate comprises a first surface away from the second substrate, and the heating electrode layer is in direct contact with the first surface.

3. The liquid crystal display panel according to claim 1 , further comprising:
a backlight module on the side of the first substrate away from the second substrate; and
a first polarizer between the backlight module and the first substrate,
wherein the heating electrode layer is between the first polarizer and the first substrate.

4. The liquid crystal display panel according to claim 1 , wherein an area of an orthographic projection of the first heating electrode on the first surface is greater than an area of an orthographic projection of each of the at least one second heating electrode on the first surface.

5. The liquid crystal display panel according to claim 1 , wherein the heating electrode layer comprises a plurality of heating electrode groups, and at least one of the plurality of heating electrode groups comprises a plurality of second heating electrodes and a plurality of connecting portions;
wherein in the at least one heating electrode group, the plurality of second heating electrodes and the plurality of connecting portions are arranged alternately in a first direction, and two adjacent second heating electrodes are electrically connected by the connecting portion; and
wherein the plurality of heating electrode groups are arranged and spaced apart in a second direction, the second direction being different from the first direction.

6. The liquid crystal display panel according to claim 5 , wherein in the at least one heating electrode group, areas of orthographic projections of the plurality of second heating electrodes on the first surface decrease in a direction from the side edge of the first substrate to a center of the first substrate.

7. The liquid crystal display panel according to claim 6 , wherein each of the plurality of second heating electrodes has a first size in the first direction; and in the at least one heating electrode group, the first sizes of the plurality of second heating electrodes decrease in the direction from the side edge of the first substrate to the center of the first substrate; and
wherein each of the plurality of second heating electrodes has a second size in the second direction; and in the at least one heating electrode group, the second sizes of the plurality of second heating electrodes are substantially equal.

8. The liquid crystal display panel according to claim 7 , wherein the first substrate comprises a first side edge and a second side edge, and the first side edge and the second side edge are disposed opposite to each other in the first direction;
wherein the first heating electrode comprises a first electrode portion close to the first side edge and a second electrode portion close to the second side edge;
wherein the first electrode portion is configured to receive a first voltage, the second electrode portion is configured to receive a second voltage, and the first voltage is higher than the second voltage; and
wherein each of the plurality of heating electrode groups has one end in the first direction connected to the first electrode portion, and the other end in the first direction connected to the second electrode portion.

9. The liquid crystal display panel according to claim 1 , wherein the heating electrode layer comprises a plurality of heating electrode groups, and at least one of the plurality of heating electrode groups comprises a plurality of second heating electrodes and a plurality of connecting portions;
wherein in the at least one heating electrode group, the plurality of second heating electrodes and the plurality of connecting portions are arranged alternately in a second direction, and two adjacent second heating electrodes are electrically connected by the connecting portion; and
wherein the plurality of heating electrode groups are arranged and spaced apart in a first direction, the second direction being different from the first direction.

10. The liquid crystal display panel according to claim 9 , wherein in the at least one heating electrode group, areas of orthographic projections of the plurality of second heating electrodes on the first surface decrease in a direction from the side edge of the first substrate to a center of the first substrate.

11. The liquid crystal display panel according to claim 10 , wherein each of the plurality of second heating electrodes has a second size in the second direction; and in the at least one heating electrode group, the second sizes of the plurality of second heating electrodes decrease in the direction from the side edge of the first substrate to the center of the first substrate; and/or
wherein each of the plurality of second heating electrodes has a first size in the first direction; and in the at least one heating electrode group, the first sizes of the plurality of second heating electrodes are substantially equal.

12. The liquid crystal display panel according to claim 11 , wherein the first substrate comprises a third side edge and a fourth side edge, and the third side edge and the fourth side edge are disposed opposite to each other in the second direction;
wherein the first heating electrode comprises a third electrode portion close to the third side edge and a fourth electrode portion close to the fourth side edge;
wherein the third electrode portion is configured to receive a first voltage, the fourth electrode portion is configured to receive a second voltage, and the first voltage is higher than the second voltage; and
wherein each of the plurality of heating electrode groups has one end in the second direction connected to the third electrode portion, and the other end in the second direction connected to the fourth electrode portion.

13. The liquid crystal display panel according to claim 1 , wherein the liquid crystal display panel further comprises a first pin portion covering a first side edge of the first substrate and a second pin portion covering a second side edge of the first substrate.

14. The liquid crystal display panel according to claim 13 , wherein each of the first pin portion and the second pin portion comprises a first pin sub-portion, a second pin sub-portion and a third pin sub-portion, and the first pin sub-portion and the third pin sub-portion is connected by the second pin sub-portion,
wherein the first pin sub-portion is on a surface of the heating

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Wu Xiaohui
• Xu Ming
• Jiang ni

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02F1/132 Primary

  Thermal activation of liquid crystals exhibiting a thermo-optic effect · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• H05B3/20

  Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater (H05B3/62, H05B3/68, H05B3/78, H05B3/84 take precedence) · CPC title

• H05B3/84

  Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields · CPC title