FORCE TOUCH LIQUID CRYSTAL DISPLAY AND METHOD OF FABRICATING THE SAME

• US 20180180918A1
• Filed: 08/04/2016
• Published: 06/28/2018
• Est. Priority Date: 06/06/2016
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.), Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: LI, Man, GUO, Xingling, XING, Zhenzhou
• Application Number:
  US15/309,735
• Publication Number:
  US 20180180918A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G09G 2300/04 Structural and physical details of display devices
• CPC Class Codes: G09G 2330/04 Display protection
• CPC Class Codes: G09G 3/36 using liquid crystals

Abstract

A force touch liquid crystal display (LCD) and a method of fabricating the same are proposed. The force touch LCD includes: a touch panel and an LCD module. The LCD module includes a thin-film transistor (TFT) substrate, a liquid crystal layer, and a color filter substrate layered subsequently. The force touch LCD further includes a force film and a shield metal layer. The force film is formed on a surface of the touch panel, and the surface facing the LCD module. The shield metal layer is arranged on a surface of the color filter substrate. The shield metal layer can prevent the LCD display signal from being disturbed by the touch panel signal and vice versa to ensure the accuracy of display and touch.

Claims

1. A force touch liquid crystal display (LCD), comprising:

a touch panel and a liquid crystal display (LCD) module;

the LCD module comprising a thin-film transistor (TFT) substrate, a liquid crystal layer, and a color filter substrate layered subsequently wherein the force touch LCD further comprises;

a force film, formed on a surface of the touch panel, and the surface facing the LCD module; and

a shield metal layer, arranged on a surface of the color filter substrate.

2. The force touch LCD of claim 1, wherein the touch panel is attached to the LCD module tightly with an adhesive arranged on a periphery of the touch panel, and an air layer is formed between the touch panel and the LCD module.

3. The force touch LCD of claim 2, wherein a pressure capacitor is formed between the force film and the shield metal layer;

the force film and the shield metal layer form two electrodes of the pressure capacitor, respectively.

4. The force touch LCD of claim 1, wherein the shield metal layer is arranged on the surface of the color filter substrate and the surface faces the force film.

5. The force touch LCD of claim 1, wherein the shield metal layer is arranged on the surface of the color filter substrate and the surface faces the liquid crystal layer.

6. A method of fabricating a force touch liquid crystal display (LCD) comprising:

forming a force film on one surface of a touch panel;

stacking a thin-film transistor (TFT) substrate, a liquid crystal layer, and a color filter substrate subsequently to form an LCD module;

arranging a shield metal layer on one side of the color filter substrate;

arranging the force film to face the LCD module, and attaching the touch panel to the LCD module tightly.

7. The method of claim 6, wherein the touch panel is attached to the LCD module tightly with an adhesive arranged on a periphery of the touch panel, and an air layer is formed between the touch panel and the LCD module.

8. The method of claim 6, wherein a pressure capacitor is formed between the force film and the shield metal layer;

the force film and the shield metal layer form two electrodes of the pressure capacitor, respectively.

9. The method of claim 6, wherein the shield metal layer is arranged on the surface of the color filter substrate and the surface faces the force film.

10. The method of claim 6, wherein the shield metal layer is arranged on the surface of the color filter substrate and the surface faces the liquid crystal layer.