Method for making liquid crystal display adopting touch panel

• US 8,228,308 B2
• Filed: 08/13/2009
• Issued: 07/24/2012
• Est. Priority Date: 07/04/2008
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Original Assignee: Hon Hai Precision Industry Co., Ltd., Tsinghua University
• Inventors: Jiang, Kai-Li, Liu, Liang, Fan, Shou-Shan, Chen, Ga-Lane, Cheng, Jia-Shyong, Wu, Jeah-Sheng
• Primary Examiner(s): Macchiarolo, Peter
• Assistant Examiner(s): Bowman, Mary Ellen
• Application Number:
  US12/583,160
• Publication Number:
  US 20100041297A1
• Time in Patent Office: 1,076 Days
• Field of Search: 345173-174, 428/364, 438/25, 427/99.2, 178/18.05
• US Class Current: 345/173
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H10K 30/821 comprising carbon nanotubes
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber

Abstract

A method for making a liquid crystal display screen is provided. A touch panel including at least one carbon nanotube structure layer is prepared. A first polarizer is applied on a surface of the touch panel. A thin film transistor panel including a number of thin film transistors is prepared. A liquid crystal layer is placed between the first polarizer and the thin film transistors.

Claims

1. A method for making a liquid crystal display screen, the method comprising steps of:

preparing a touch panel comprising a first and second carbon nanotube layers, the first carbon nanotube layer comprising of at least a first carbon nanotube film, the second carbon nanotube layer comprising of at least a second carbon nanotube film and a thin film transistor panel comprising a plurality of thin film transistors;

wherein at least one of the first and second carbon nanotube films is treated with an organic solvent;

applying a first polarizer on a surface of the touch panel; and

placing a liquid crystal layer between the first polarizer and the plurality of thin film transistors;

wherein the touch panel is prepared by the following steps of;

forming a first and a second electrode plate, wherein forming the first electrode plate comprises;

supplying a first substrate;

laying the at least a first carbon nanotube film on the first substrate thereby forming a first conductive layer on the first substrate; and

connecting two first electrodes to the first conductive layer; and

forming the second electrode plate comprises;

supplying a second substrate;

laying the at least a second carbon nanotube film on the second substrate thereby forming a second conductive layer on the first substrate; and

connecting two second electrodes to the second conductive layer; and

assembling the first electrode plate and the second electrode plate together having a space between the first substrate and the second substrate.

2. The method of claim 1, wherein at least one carbon nanotube film is formed by:

providing an array of carbon nanotubes;

selecting one or more carbon nanotubes from the array of carbon nanotubes; and

pulling the carbon nanotubes to form carbon nanotube segments that are joined end to end.

3. The method of claim 1, further comprising laser treating at least one of the first and second carbon nanotube films.

4. The method of claim 1, wherein the at least one of the first and second carbon nanotube films is laid on the first and second substrates before the organic solvent treatment.

5. The method of claim 4, wherein the organic solvent is applied on the carbon nanotube film.

6. The method of claim 4, wherein the treated carbon nanotube films are placed into a container filled with the organic solvent.

7. The method of claim 1, wherein further comprising steps of:

infiltrating a polymer solution into at least one of the first and second carbon nanotube films; and

curing the polymer solution to form a carbon nanotube composite layer on at least one of the first and second substrates.

8. The method of claim 7, wherein infiltrating the polymer solution into the at least one of the first and second carbon nanotube films comprises steps of:

coating a layer of polymer solution on at least one of the first and second substrates;

placing the first or second carbon nanotube film on the layer of polymer solution.

9. The method of claim 1, wherein the first carbon nanotube film is laid on the first substrate along a first direction and the second carbon nanotube film is laid on the second substrate along a second direction, wherein the first direction intersects with the second direction.

10. The method of claim 1, wherein the two first electrodes in the first electrode plate and the two second-electrodes in the second electrode plate are set at angles to each other.

11. The method of claim 1, further comprising steps of:

applying an insulator on the second electrode plate;

placing the first electrode plate on the insulator; and

sealing the first electrode plate, the second electrode plate, and the insulating layer with a sealant.

12. The method of claim 11, further comprising steps of:

applying a slurry comprising a plurality of dot spacers on at least one of the first and second conductive layers; and

drying the slurry resulting in a plurality of dot spacers between the first electrode plate and the second electrode plate.

13. The method of claim 1, wherein material of the first substrate comprises of a material selected from the group consisting of polycarbonate, polymethyl methacrylate, polyethylene terephthalate, PES, cellulose acetate, benzocyclobutene, polyvinyl chloride, and any other acrylic resins, and any combination thereof.

14. The method of claim 1, wherein further comprising steps of applying a first and a second alignment layer;

wherein the first alignment layer is applied on the first polarizer; and

the second alignment layer is applied on the plurality of thin film transistors.

15. The method of claim 1, wherein the first polarizer is located on the surface of the touch panel.

16. The method of claim 1, further comprising a step of placing a second polarizer on a surface the thin film transistor panel.