TOUCH SCREEN

• US 20100177052A1
• Filed: 03/12/2009
• Published: 07/15/2010
• Est. Priority Date: 01/09/2009
• Status: Active Grant

• Current Assignee: Quanta Computer
• Original Assignee: Quanta Computer
• Inventors: Wu, Chih-Hsien, Tsai, Wen-Ji, Chang, Jung-Wen, Lin, Wan-Chi
• Granted Patent: US 8,179,383 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

The present application provides a touch screen including a panel module, an image sensor module, and a bezel surrounding the panel module. The image sensor module includes a circuit board and an image sensor unit electrically connected thereto, and both are disposed on the panel module. The image sensor unit has an image sensing surface substantially perpendicular to the circuit board for object detection on a display surface of the panel module.

Claims

1. A touch screen, comprising:

a panel module, comprising a display surface;

at least one image sensor module, comprising a circuit board and an image sensor unit electrically connected thereto, wherein the circuit board and the image sensor are disposed on the panel module, and the image sensor comprises an image sensing surface substantially perpendicular to the circuit board; and

a bezel, surrounding the panel module and the image sensor module.

2. The touch screen as claimed in claim 1, wherein the image sensor module further comprises a light source disposed on the circuit board.

3. The touch screen as claimed in claim 2, wherein the light source comprises an LED.

4. The touch screen as claimed in claim 2, wherein the touch screen further comprises a light reflector disposed on the panel module to reflect light from the light source.

5. The touch screen as claimed in claim 4, wherein the light reflector is U-shaped.

6. The touch screen as claimed in claim 1, wherein the bezel and the circuit board form a gap therebetween.

7. The touch screen as claimed in claim 6, wherein the touch screen further comprises a wireless module or an antenna disposed in the gap.

8. The touch screen as claimed in claim 6, wherein the gap has a width substantially equal to a height of the image sensor module along a direction perpendicular to the circuit board.

9. The touch screen as claimed in claim 1, wherein the image sensor module further comprises a flexible printed circuit electrically connecting the circuit board with the image sensor unit.

10. The touch screen as claimed in claim 1, wherein the image sensor unit is fixed to the circuit board.

11. The touch screen as claimed in claim 1, wherein the image sensor unit and the circuit board are disposed on opposite sides of the panel module.

12. The touch screen as claimed in claim 1, wherein the image sensor unit further comprises a line sensor disposed on the image sensing surface.

13. The touch screen as claimed in claim 1, wherein a top portion of the image sensor unit abuts the bezel, and the circuit board abuts the panel module.

14. The touch screen as claimed in claim 1, wherein the circuit board abuts the bezel, and a top portion of the image sensor unit abuts the panel module.

15. A touch screen, comprising:

a panel module, comprising a display surface;

two image sensor modules disposed at two adjacent corners of the panel module, wherein each of the image sensor modules comprise a circuit board and an image sensor unit electrically connected thereto, and the circuit board and the image sensor are disposed on the panel module, and the image sensor comprises an image sensing surface substantially perpendicular to the circuit board; and

a bezel, surrounding the panel module and the image sensor modules.

16. The touch screen as claimed in claim 15, wherein the image sensor module further comprises a flexible printed circuit electrically connecting the circuit board with the image sensor unit.

17. The touch screen as claimed in claim 16, wherein the image sensor module further comprises a light source disposed on the circuit board.

18. The touch screen as claimed in claim 17, wherein the touch screen further comprises a light reflector disposed on the panel module to reflect light from the light source.

19. The touch screen as claimed in claim 18, wherein a top portion of the image sensor units of the image sensor modules abut the bezel, and the circuit board abuts the panel module.

20. The touch screen as claimed in claim 18, wherein the circuit board abuts the bezel, and a top portion of the image sensor units of the image sensor modules abut the panel module.