Touch panel liquid crystal display

• US 20050052582A1
• Filed: 02/23/2004
• Published: 03/10/2005
• Est. Priority Date: 09/09/2003
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Toppoly Optoelectronics Corporation (InnoLux Corporation)
• Inventors: Mai, Che-Kuei
• Application Number:
  US10/785,766
• Publication Number:
  US 20050052582A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 2202/22 Antistatic materials or arrangements
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1637 Details related to the display arrangement, including those related to the mounting of the display in the housing
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

A touch-panel liquid crystal display is provided. The touch-panel liquid crystal display comprises a casing, a liquid crystal display module, a touch panel, a transparent conducting layer, a controlling circuit board, and a conductive buffer layer. The transparent conducting layer is disposed on the surface of the touch panel. The conductive buffer layer is disposed between the casing and the transparent conducting layer. The conductive buffer layer can be electrically connected to the casing or the conductive module casing of the liquid crystal display module so that the electrostatic charges can be released from the touch-panel LCD to ground. Hence, the electrostatic charges are effectively released from the touch panel and are prevented from entering into the controlling circuit board and the other electronic devices in the LCD.

Claims

1. A touch panel liquid crystal display, comprising:

a casing having a display opening;

a liquid crystal display module disposed in said casing;

a touch panel disposed in said casing, said touch panel being on said liquid crystal module, a portion of said touch panel being exposed via said display opening;

a transparent conducting layer disposed on a surface of said touch panel farther away from said liquid crystal display module; and

a controlling circuit board disposed in said casing, said controlling circuit board being electrically connected to said liquid crystal display module and said touch panel.

2. The touch panel liquid crystal display according to claim 1, wherein said casing includes a conducting material.

3. The touch panel liquid crystal display according to claim 2 further comprising a conducting buffer material disposed between said casing and said transparent conducting layer, said conducting buffer material being electrically connected to ground via said casing.

4. The touch panel liquid crystal display according to claim 1, wherein said casing include a non-conducting material.

5. The touch panel liquid crystal display according to claim 1, wherein said liquid crystal display module comprises:

a frame;

a liquid crystal panel disposed in said frame;

a back light module disposed in said frame and below said liquid crystal panel; and

a conducting module casing, wherein in said frame, said liquid crystal panel, and said back light module being fixed into said conducting module casing.

6. The touch panel liquid crystal display according to claim 5 further comprising a conducting buffer material disposed between said casing and said transparent conducting layer, wherein said conducting buffer material is electrically connected to ground via said casing.

7. The touch panel liquid crystal display according to claim 1, wherein said touch panel comprises:

a first substrate;

a first conducting layer disposed on a surface of said first substrate;

a second substrate disposed above said first substrate;

a second conducting layer disposed on a surface of said second substrate adjacent to said first substrate;

a plurality of spacers disposed between said first conducting layer and said second conducting layer;

a first bus disposed on said first conducting layer and surrounding said plurality of spacers;

a second bus disposed above said first bus; and

an adhesive layer disposed between said first bus and said second bus to insulate said first bus and said second bus.

8. The touch panel liquid crystal display according to claim 7, wherein said touch panel further comprises an anti-scratch layer disposed between said second substrate and said transparent conducting layer.

9. The touch panel liquid crystal display according to claim 7, wherein said first substrate and said second substrate include at least one of rigid substrate and flexible substrate.

10. The touch panel liquid crystal display according to claim 7, wherein said first substrate and said second substrate include at least one of glass, plastic, and polyethylene tetrephthalate (PET).

11. The touch panel liquid crystal display according to claim 7, wherein a material of said first bus and said second bus includes silver (Ag).

12. The touch panel liquid crystal display according to claim 7, wherein said plurality of spacers includes a dielectric material.

13. The touch panel liquid crystal display according to claim 1, wherein said transparent conducting layer includes at least one of indium tin oxide (ITO) and indium zinc oxide (IZO).

14. The touch panel liquid crystal display according to claim 3, wherein said conducting buffer material includes a conducting rubber.

15. The touch panel liquid crystal display according to claim 3 further comprising a plurality of conducting threads in said conducting buffer material.

16. The touch panel liquid crystal display according to claim 6, wherein said conducting buffer material includes a conducting rubber.

17. The touch panel liquid crystal display according to claim 6 further comprising a plurality of conducting threads in said conducting buffer material.

18. An electronic device, comprising:

a touch panel display as in claim 1;

and

a device controller coupled to the display system and configured to process data corresponding to an image to be rendered by the display system.

19. The electronic device according to claim 18, further comprising at least one of a portable device, a display monitor and a user input device.

20. A touch panel input device, comprising:

a touch panel; and

a grounding conductor conductively coupled to said touch panel and configured to be conductively coupled to an external ground.