Liquid crystal display screen

• US 8,237,679 B2
• Filed: 08/13/2009
• Issued: 08/07/2012
• 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:
  US12/583,161
• Publication Number:
  US 20100001971A1
• Time in Patent Office: 1,090 Days
• Field of Search: 345173-174, 359/485.01, 524/496, 257/222, 349/123
• 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 liquid crystal display screen includes an upper component, a bottom component and a liquid crystal layer. The upper component includes a touch panel. The touch panel includes a first conductive layer. The first conductive layer includes a transparent carbon nanotube structure. The bottom component includes a thin film transistor panel. The thin film transistor panel includes a plurality of thin film transistors. Each of the plurality of thin film transistors includes a semiconducting layer, and the semiconducting layer includes a semiconducting carbon nanotube structure. The liquid crystal layer is located between the upper component and the lower component.

Claims

1. A liquid crystal display screen comprising:

an upper component comprising a touch panel;

the touch panel comprises;

a first electrode plate comprising;

a first substrate;

a first conductive layer located on a surface of the first substrate; and

two first electrodes electrically connected to the first conductive layer, a direction from one of the two first electrodes across the first conductive layer to another one of the two first electrodes being defined as a first direction; and

a second electrode plate spaced from the first electrode plate, and comprising;

a second substrate;

a second conductive layer located on the second substrate; and

two second electrodes electrically connected to the second conductive layer, a direction from one of the two second electrodes across the second conductive layer to another one of the two second electrodes being defined as a second direction,

wherein the first conductive layer comprises a stand-alone, self-adhesive first carbon nanotube film;

the first carbon nanotube film comprises a plurality of first carbon nanotube segments joined end-to-end by van der Waals attractive force therebetween;

each of the plurality of first carbon nanotube segments comprises a plurality of first carbon nanotubes parallel to each other and joined by van der Waals attractive force therebetween;

the plurality of first carbon nanotube segments are successively oriented and integrated together by van der Waals attractive force therebetween to form the first carbon nanotube film,

wherein the second conductive layer comprises a stand-alone, self-adhesive second carbon nanotube film the second carbon nanotube film comprises a plurality of second carbon nanotube segments joined end-to-end by van der Waals attractive force therebetween;

each of the plurality of second carbon nanotube segments comprises a plurality of second carbon nanotubes parallel to each other and joined by van der Waals attractive force therebetween;

the plurality of second carbon nanotube segments are successively oriented and integrated together by van der Waals attractive force therebetween to form the second carbon nanotube film, and

wherein the first carbon nanotubes in the first conductive layer are arranged along the first direction, and the second carbon nanotubes in the second conductive layer are arranged along the second direction;

a bottom component comprising a thin film transistor panel,

the thin film transistor panel comprising

a plurality of thin film transistors, wherein each of the plurality of thin film transistors comprises a semiconducting layer, the semiconducting layer comprising a semiconducting carbon nanotube structure; and

a liquid crystal layer located between the upper component and the bottom component.

2. The liquid crystal display screen of claim 1, wherein the first the semiconducting carbon nanotube structure comprises a plurality of semiconducting carbon nanotubes.

3. The liquid crystal display screen of claim 2, wherein the semiconducting carbon nanotubes are selected from the group consisting of single-walled carbon nanotubes, multi-walled carbon nanotubes, and combinations thereof.

4. The liquid crystal display screen of claim 3, wherein diameters of the single-walled carbon nanotubes are less than 10 nanometers.

5. The liquid crystal display screen of claim 1, wherein the semiconducting carbon nanotube structure comprises a semiconducting carbon nanotube film.

6. The liquid crystal display screen of claim 5, wherein the semiconducting carbon nanotube structure comprises two or more semiconducting carbon nanotube films adjacent to each other or stacked on each other.

7. The liquid crystal display screen of claim 5, wherein the semiconducting carbon nanotube film is a disordered semiconducting carbon nanotube film.

8. The liquid crystal display screen of claim 7, wherein the disordered semiconducting carbon nanotube film comprises a plurality of semiconducting carbon nanotubes entangled with each other.

9. The liquid crystal display screen of claim 5, wherein the semiconducting carbon nanotube film is an ordered semiconducting carbon nanotube film.

10. The liquid crystal display screen of claim 9, wherein the ordered semiconducting carbon nanotube film comprises a plurality of semiconducting carbon nanotubes joined end to end and oriented along the same direction.

11. The liquid crystal display screen of claim 10, wherein the semiconducting carbon nanotube structure comprises two ordered semiconducting carbon nanotube films, the two ordered semiconducting carbon nanotube films are adjacent and directly stacked with each other and an angle between the direction of carbon nanotubes in the two adjacent and directly stacked ordered semiconducting carbon nanotube films is in a range from 0°

to about 90°

.

12. The liquid crystal display screen of claim 1, wherein the first conductive layer further comprises a polymer material infiltrated in the integrated first carbon nanotube film to form a composite.

13. The liquid crystal display screen of claim 12, wherein the polymer comprises a material that is selected from the group consisting of polystyrene, polyethylene, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, benzo cyclo butene, and polyalkenamer.

14. The liquid crystal display screen of claim 1, wherein the first direction is perpendicular to the second direction.

15. The liquid crystal display screen of claim 2, wherein the plurality of semiconducting carbon nanotubes are parallel with each other and substantially equal in length, a length of the semiconducting carbon nanotube structure is equal to the length of the plurality of semiconducting carbon nanotubes.

16. The liquid crystal display screen of claim 15, wherein the plurality of semiconducting carbon nanotubes are arranged along a preferred orientation extending from a source electrode to a drain electrode.

17. The liquid crystal display screen of claim 1, wherein the thin film transistor panel further comprises:

a third substrate;

a display driving circuit; and

a pixel electrode connected to each of the thin film transistors,

wherein the plurality of thin film transistors are located on the third substrate and electrically connected to the display driving circuit.

18. The liquid crystal display screen of claim 1, wherein the upper component further comprises a first polarizer and a first alignment layer, the first polarizer is located between the touch panel and the first alignment layer.

19. The liquid crystal display screen of claim 18, wherein the first polarizer comprises a plurality of carbon nanotubes arranged along the same direction.

20. The liquid crystal display screen of claim 1, wherein the bottom component further comprises a second alignment layer and a second polarizer, the thin film transistor panel is located between the second alignment layer and the second polarizer.

21. The liquid crystal display screen of claim 1, wherein the upper component further comprises a first polarizer and a first alignment layer;

the bottom component further comprises a second alignment layer and a second polarizer;

wherein the first polarizer and the second polarizer both comprise a plurality of carbon nanotubes aligned approximately along the same direction, the carbon nanotubes in the first polarizer are perpendicular to the carbon nanotubes in the second polarizer.

22. The liquid crystal display screen of claim 1, wherein the bottom component further comprises a carbon nanotube layer configured for both polarizing light and aligning liquid crystals, wherein the carbon nanotube layer comprises a plurality of carbon nanotubes substantially arranged along a primary direction.