Optical touch control device and optical touch control system

• US 8,537,139 B2
• Filed: 08/25/2011
• Issued: 09/17/2013
• Est. Priority Date: 05/12/2011
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Chen, Yu-Yen
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): Ritchie, Darlene M
• Application Number:
  US13/217,266
• Publication Number:
  US 20120287083A1
• Time in Patent Office: 754 Days
• Field of Search: 345/207, 345173-176, 345/156, 345/1.1, 345/1.3, 715/863
• US Class Current: 345/175
• CPC Class Codes: G06F 2203/04803 Split screen, i.e. subdividing the display area or the window area into separate subareas
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

An optical touch control device includes a detection area, a plurality of image capturing modules, for capturing a plurality of images on the detecting area, and a processing module, coupled to the plurality of image capturing modules, for determining a touch status of the detection area according to variations of the plurality of images, wherein a plurality of capture angles of the plurality of image capturing modules relative to the detection are greater than 90°.

Claims

1. An optical touch control device, comprising:

a detection area;

a plurality of image capturing modules, for capturing a plurality of images on the detection area; and

a processing module, coupled to the plurality of image capturing modules, for determining a touch status of the detection area according to variations of the plurality of images;

wherein a capture angle captured by each of the plurality of image capturing modules relative to the detection area is greater than 90°

, and the processing module further comprises a plurality of first processors coupled to the plurality of image capturing modules for dividing the plurality of captured images into equal parts according to a disposition of the plurality of image capturing modules on the optical touch control device or a relative disposition between the plurality of image capturing modules and at least another optical touch control device.

2. The optical touch control device of claim 1, wherein the processing module comprises:

a second processor, coupled to the plurality of first processors, for determining the touch status according to the equally divided parts of the plurality of images.

3. The optical touch control device of claim 2, wherein a plurality of capture angles of the plurality of image capturing modules relative to the detection area are 360°

.

4. The optical touch control device of claim 3, wherein the plurality of first processors divide the plurality of images into equal parts of 0°

-90°

, 90°

-180°

, 180°

-270°

, and 270°

-360°

, respectively.

5. The optical touch control device of claim 2, wherein a plurality of capture angles of the plurality of image capturing modules relative to the detection area are 180°

.

6. The optical touch control device of claim 5, wherein the plurality of first processors divide the plurality of images into equal parts of 0°

-90° and

90°

-180°

, respectively.

7. The optical touch control device of claim 1 further comprising a lighting unit, for generating a light source to assist the plurality of image capturing modules to capture the plurality of images on the detection area.

8. The optical touch control device of claim 7, wherein the lighting unit is an infra-red light source.

9. An optical touch control system, comprising:

a plurality of optical touch control devices, each optical touch control device comprising;

a detection area;

a plurality of image capturing modules, for capturing a plurality of images on the detection area; and

a processing module, coupled to the plurality of image capturing modules, for determining a touch status on the detection area according to variations of the plurality of images; and

a touch processor, coupled to each processing module of the plurality of optical touch control device, for calculating a global touch status according to the touch status determined by the each processing module;

wherein a capture angle captured by each of the plurality of image capturing modules relative to the detection area is greater than 90°

, and the processing module further comprises a plurality of first processors coupled to the plurality of image capturing modules for dividing the plurality of captured images into equal parts according to a disposition of the plurality of image capturing modules on the optical touch control device or a relative disposition between the plurality of image capturing modules and at least another optical touch control device.

10. The optical touch control system of claim 9, wherein the processing module comprises:

a second processor, coupled to the plurality of first processors, for determining the touch status according to the equally divided parts of the plurality of images.

11. The optical touch control system of claim 10, wherein a plurality of capture angles of the plurality of image capturing modules relative to the detection area are 360°

.

12. The optical touch control system of claim 11, wherein the plurality of first processors divide the plurality of images into equal parts of 0°

-90°

, 90°

-180°

, 180°

-270°

, and 270°

-360°

, respectively.

13. The optical touch control system of claim 10, wherein a plurality of capture angles of the plurality of image capturing modules relative to the detection area are 180°

.

14. The optical touch control system of claim 13, wherein the plurality of first processors divide the plurality of images into equal parts of 0°

-90° and

90°

-180°

, respectively.

15. The optical touch control system of claim 9 further comprising a lighting unit, for generating a light source to assist the plurality of image capturing modules to capture the plurality of images on the detection area.

16. The optical touch control device of claim 10, wherein the lighting unit is an infra-red light source.

17. The optical touch control system of claim 9, wherein adjacent optical touch control devices of the plurality of optical touch control devices share image capturing modules.