Liquid crystal display screen

• US 8,237,677 B2
• Filed: 07/02/2009
• 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:
  US12/459,566
• Publication Number:
  US 20100001976A1
• Time in Patent Office: 1,132 Days
• Field of Search: 345173-174, 359/486, 524/496, 257/222, 427/163.1, 423/445, 445 24- 25
• 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 conductive layer includes a transparent carbon nanotube structure, and the transparent carbon nanotube structure includes a plurality of metallic carbon nanotubes. The bottom component includes a thin film transistor panel. The liquid crystal layer is located between the upper component and the lower component.

Claims

1. An apparatus, the apparatus comprising:

an upper component comprising a touch panel;

the touch panel comprises;

a first conductive layer;

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;

a bottom component comprising a thin film transistor panel; and

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

2. The apparatus of claim 1, wherein the touch panel comprises:

a first electrode plate comprising;

a first substrate,

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

two first electrodes that are connected to the first conductive layer; and

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

a second substrate;

a second conductive layer located on the second substrate;

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

two second electrodes, the two second electrodes are electrically connected to the second conductive layer;

an insulative layer located between the first and second electrode plates, the insulative layer insulates the first electrode plate from the second electrode plate;

one or more of dot spacers, the one or more of dot spacers are located between the first conductive layer and the second conductive layer.

3. The apparatus of claim 2, wherein the first conductive layer comprise two first carbon nanotube films and the second conductive layer comprise two second carbon nanotube films.

4. The apparatus of claim 3, wherein the first carbon nanotube film and the second carbon nanotube film have a thickness in a range from about 0.5 nanometers to about 1 millimeter.

5. The liquid crystal display screen of claim 3, wherein the two first carbon nanotube films are stacked on each other, and the two second carbon nanotube films are stacked on each other.

6. The apparatus of claim 3, wherein the two first carbon nanotube films are stacked on each other, and the two second carbon nanotube films are stacked on each other.

7. The apparatus of claim 1, wherein the first conductive layer further comprise polymer infiltrated in the first carbon nanotube film and the second conductive layer further comprise polymer infiltrated in the second carbon nanotube film.

8. The apparatus of claim 7, 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.

9. The apparatus of claim 1, wherein the plurality of first carbon nanotubes in the first conductive layer are arranged along a first direction, and the plurality of second carbon nanotubes in the second conductive layer are arranged along a second direction.

10. The apparatus of claim 9, wherein the first direction is perpendicular to the second direction.

11. The apparatus 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, and the first alignment layer is adjacent to the liquid crystal layer.

12. The apparatus of claim 11, wherein the first polarizer comprises a plurality of carbon nanotubes arranged along the same direction.

13. The apparatus of claim 12, wherein a thickness of the first polarizer ranges from about 1 micrometer to about 0.5 millimeters.

14. The apparatus of claim 1, wherein the thin film transistor panel further comprises:

a third substrate;

a display driving circuit;

a plurality of thin film transistors located on the third substrate and electrically connected to the display driving circuit; and

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

15. The apparatus 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, and the second alignment layer is adjacent to the liquid crystal layer.

16. The apparatus 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.

17. An apparatus, the apparatus comprising:

an upper component comprising a touch panel;

the touch panel comprises;

a first electrode plate comprising;

a first substrate and a first transparent carbon nanotube structure located on a surface of the first substrate and comprising 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 plurality of first carbon nanotubes are arranged along a first direction; and

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

a second substrate and a second transparent carbon nanotube structure located on a surface of the second substrate and comprising 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 plurality of second carbon nanotubes are arranged along a second direction, the first direction being perpendicular to the second direction;

two first electrodes that are connected to the first transparent carbon nanotube structure;

two second electrodes that are electrically connected to the second transparent carbon nanotube structure;

an insulative layer located between the first and second electrode plates to insulates the first electrode plate from the second electrode plate; and

one or more of dot spacers located between the first transparent carbon nanotube structure and the second transparent carbon nanotube structure;

a bottom component comprising a thin film transistor panel; and

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