Liquid crystal display panel

• US 9,348,166 B2
• Filed: 07/22/2014
• Issued: 05/24/2016
• Est. Priority Date: 03/06/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Pang, Libin, Oh, Dongki, Gao, Xuesong
• Primary Examiner(s): DUDEK, JAMES A
• Application Number:
  US14/337,462
• Publication Number:
  US 20150253605A1
• Time in Patent Office: 672 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

The present disclosure provides a liquid crystal display panel. The liquid crystal display panel comprises an array substrate and a color filter substrate. Liquid crystal is filled between the array substrate and the color filter substrate, the array substrate includes a pixel electrode, and the color filter substrate includes a common electrode corresponding to the pixel electrode. The common electrode stores charges when an external object carrying static electricity touches a display region of the liquid crystal display panel, and thus a potential difference is formed between the pixel electrode of the array substrate and respective touch points, contacting with the external object, in the display region of the liquid crystal display panel, so that the liquid crystal between the touch point and the pixel electrode is deflected according to the formed potential difference. With such liquid crystal display panel, a process for displaying dynamically depicted graphs is simplified.

Claims

1. A liquid crystal display panel, comprising an array substrate and a color filter substrate, in which liquid crystal is filled between the array substrate and the color filter substrate, the array substrate includes a pixel electrode, and the color filter substrate includes a common electrode corresponding to the pixel electrode, wherein:

the common electrode stores charges when an external object carrying static electricity touches a display region of the liquid crystal display panel, and thus a potential difference is formed between the pixel electrode of the array substrate and respective touch points, contacting with the external object, in the display region of the liquid crystal display panel, so that the liquid crystal between the touch point and the pixel electrode is deflected according to the formed potential difference,

wherein the color filter substrate further comprises at least one common electrode switch for controlling electrical connection and disconnection of the common electrode with a power supply,

wherein when the common electrode switch is switched off, the liquid crystal display panel is used as a demonstration board which is capable of displaying dynamically depicted graphs;

when the common electrode switch is switched on, there is no potential difference between the common electrode and the pixel electrode, and the liquid crystal filled between the common electrode and the pixel electrode is not deflected, so that the graphs dynamically depicted on the liquid crystal display panel are removed or the liquid crystal display panel is used for displaying images.

2. The liquid crystal display panel according to claim 1, wherein the at least one common electrode switch comprises one common electrode switch used for controlling turn-on or turn-off of the common electrode corresponding to the whole display region.

3. The liquid crystal display panel according to claim 1, wherein the display region of the liquid crystal display panel is divided into at least two sub-regions, and the at least one common electrode switch comprises at least two common electrode switches, and each sub-region corresponds to one common electrode switch used for controlling turn-on or turn-off of the common electrode corresponding to the respective sub-regions.

4. The liquid crystal display panel according to claim 3, wherein the at least one common electrode switch comprises one common electrode switch used for controlling, as a whole, turn-on or turn-off of the common electrode corresponding to the whole display region.

5. The liquid crystal display panel according to claim 1, wherein the color filter substrate further comprises:

a substrate on which the common electrode and the at least one common electrode switches are provided;

black matrixes provided beneath the substrate; and

an orientation film provided beneath the black matrixes.

6. The liquid crystal display panel according to claim 5, wherein the color filter substrate further comprises:

an indium tin oxide layer formed between the black matrix and the orientation film; and

a transparent resin formed among the black matrixes and configured to flatten a surface of a layer in which the black matrixes are located.

7. The liquid crystal display panel according to claim 6, wherein the liquid crystal display panel further comprises:

a first polarizer provided on the color filter substrate;

a second polarizer provided beneath the array substrate; and

a backlight module provided beneath the second polarizer.

11. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel further comprises supporting and partitioning members provided between the array substrate and the color filter substrate and provided on the orientation film of the color filter substrate, the supporting and partitioning members being configured to partition the liquid crystal.

8. The liquid crystal display panel according to claim wherein the color filter substrate further comprises:

a substrate;

black matrixes provided beneath the substrate; and

an orientation film provided beneath the black matrixes;

wherein the common electrode and the at least one common electrode switches are provided between the black matrix and the orientation film.

9. The liquid crystal display panel according to claim 8, wherein the color filter substrate further comprises:

an indium tin oxide layer formed between the black matrixes and the common electrode; and

a transparent resin formed among the black matrixes and configured to flatten a surface of a layer in which the black matrixes are located.

10. The liquid crystal display panel according to claim 9, wherein the liquid crystal display panel further comprises:

a first polarizer provided on the color filter substrate;

a second polarizer provided beneath the array substrate; and

a backlight module provided beneath the second polarizer.