Optical touch module

• US 8,164,581 B2
• Filed: 09/01/2009
• Issued: 04/24/2012
• Est. Priority Date: 06/09/2009
• Status: Active Grant

• Current Assignee: Quanta Computer
• Original Assignee: Quanta Computer
• Inventors: Tsai, Wen-Ji, Yan, Bo-Ren, Wu, Bo-Yi, Chang, Jung-Wen
• Primary Examiner(s): GIESY, ADAM
• Application Number:
  US12/551,634
• Publication Number:
  US 20100309144A1
• Time in Patent Office: 966 Days
• Field of Search: 345/173, 345/175, 178/18.09
• US Class Current: 345/175
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

An optical touch panel includes a frame, a first and a second image capture units, a first and second light sources, a first reflective element and a block element. The first and second image capture units are disposed on the frame and respectively disposed adjacent to the first and second light sources. The line between the first and second light sources defines a first connecting line. The reflective element disposed on a first side of the frame has a top point. The line between the top point and the second image capture unit defines a second connecting line. The block element blocks the first connecting line, but does not block the second connecting line.

Claims

1. An optical touch module, comprising:

a frame;

a first image capture unit, disposed at a first position of the frame;

a second image capture unit, disposed at a second position of the frame, wherein the second position is adjacent to the first position;

a first light source, disposed adjacent to the first image capture unit, the first light source and the second image capture unit forming a first connecting line;

a second light source, disposed adjacent to the second image capture unit;

a first reflective element, disposed on a first side of the frame, wherein the first side is adjacent to the first image capture unit, the first reflective element comprises a top point, and the top point and the second image capture unit form a second connecting line;

a second reflective element, disposed on a second side of the frame at an inclined angle, wherein the second side is adjacent to the first side, the second reflective element has an inclined angle relative to a normal direction of the touch panel, and the inclined angle ranges from 3-10 degrees; and

a block for blocking the first connecting line and the second connecting line is not being blocked by the block.

2. The optical touch module as claimed in claim 1, wherein the block comprises a supporting portion and a blocking portion, the supporting portion is connected to the blocking portion to form a T shape.

3. The optical touch module as claimed in claim 1, further comprising a decorative member disposed between the first reflective elements and the frame and between the second reflective elements and the frame.

4. The optical touch module as claimed in claim 3, wherein the decorative member comprises a material that is pervious to light.

5. The optical touch module as claimed in claim 1, wherein the first and second reflective elements are disposed between the frame and a decorative member.

6. The optical touch module as claimed in claim 1, wherein the first light source and the second light source comprises a light emitting diode.

7. The optical touch module as claimed in claim 1, wherein the block comprises a supporting portion and a blocking portion, and the supporting portion is connected to the blocking portion to form a T shape.

8. The optical touch module as claimed in claim 7, further comprising a decorative member disposed between the first reflective elements and the frame and between the second reflective elements and the frame.

9. The optical touch module as claimed in claim 7, wherein the first and second reflective elements are disposed between the frame and a decorative member.

10. The optical touch module as claimed in claim 9, wherein the decorative member comprises a material that is pervious to light.

11. The optical touch module as claimed in claim 10, wherein the first light source and the second light source comprises a light emitting diode.

12. The optical touch module as claimed in claim 11, wherein the inclined angle ranges from 3-10 degrees.