Optical Touch Display Device and Method Thereof

• US 20100201639A1
• Filed: 08/24/2009
• Published: 08/12/2010
• Est. Priority Date: 02/10/2009
• Status: Active Grant

• Current Assignee: Quanta Computer
• Original Assignee: Quanta Computer
• Inventors: Liou, Chiou-Tzung, Liu, Yun-Cheng, Chiang, Ching-Chun, Chang, Ting-Hsuan, Huang, Yi-Ming
• Granted Patent: US 8,493,341 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06F 3/0428 by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual sensing beam interruptions in a planar beam grid of an optical touch-screen G06F3/0421

Abstract

The invention provides an optical touch display device. The optical touch display device comprises a display module, a first image capturing module, a second image capturing module and a processing module. The display module generates N touch points according to a touch gesture, the touch gesture has a specific moving model, and N is a positive integer. The first image capturing module retrieves a first image relating to N touch points. The second image capturing module retrieves a second image relating to N touch points. The processing module determines correspondingly a specific touch chord of N touch points according to the first image and the second image, and determines correspondingly a specific function of the touch gesture according to the specific touch chord and the specific moving mode.

Claims

1. An optical touch display device, comprising:

a display module, N touch points being generated on the display module through a touch gesture, the touch gesture having a specific moving mode, N being a positive integer;

a first image capturing module, for capturing a first image related to the N touch points;

a second image capturing module, for capturing a second image related to the N touch points; and

a processing module, coupled to the display module, the first image capturing module, and the second image capturing module, for determining a specific touch chord corresponding to the N touch points according to the first image and the second image, and determining a specific action corresponding to the touch gesture according to the specific touch chord and the specific moving mode.

2. The optical touch display device of claim 1, wherein the first image capturing module is located on a first position of the display module, the second image capturing module is located on a second position of the display module, and the first position is adjacent to the second position.

3. The optical touch display device of claim 1, wherein the first image comprises M1 first observation points and the second image comprises M2 second observation points, the M1 first observation points and the M2 second observation points are both related to the N touch points, and M1 and M2 are both positive integers.

4. The optical touch display device of claim 3, wherein the processing module selects the specific touch chord correspondingly from a plurality of pre-stored touch chords according to combinations of M1 and M2.

5. The optical touch display device of claim 3, wherein when M1=1 and M2=1, the specific touch chord is defined single-point touch chord.

6. The optical touch display device of claim 3, wherein when M1=2 and M2=2, the specific touch chord is defined first dual-point touch chord;

when M1=1 and M2=2, the specific touch chord is defined second dual-point touch chord;

when M1=2 and M2=1, the specific touch chord is defined third dual-point touch chord.

7. The optical touch display device of claim 3, wherein when M1>

2 or M2>

2, the specific touch chord is a multi-point touch chord.

8. The optical touch display device of claim 3, wherein the M1 first observation points and the M2 second observation points formed on the first image and the second image respectively is caused by an object shielding light.

9. The optical touch display device of claim 8, wherein the light is emitted from a lighting unit located around the display module, or reflected by a reflective unit located around the display module.

10. The optical touch display device of claim 3, wherein the specific moving mode is related to a movement of a first center position of the M1 first observation points and a second center position of the M2 second observation points, the first center position is a position average value of the M1 first observation points and the second center position is a position average value of the M2 second observation points.

11. The optical touch display device of claim 1, wherein the specific action is selected from the group of:

zoom-in, zoom-out, upward scrolling, downward scrolling, left scrolling, right scrolling, previous page, next page, previous label, and next label.

12. A method of operating an optical touch display device, the method comprising the steps of:

(a) generating N touch points on the optical touch display device through a touch gesture, N being a positive integer;

(b) capturing a first image and a second image related to the N touch points respectively;

(c) determining a specific touch chord corresponding to the N touch points according to the first image and the second image;

(d) determining a specific action corresponding to the touch gesture according to the specific touch chord and a specific moving mode of the touch gesture; and

(e) performing the specific action.

13. The method of claim 12, wherein the first image comprises M1 first observation points and the second image comprises M2 second observation points, the M1 first observation points and the M2 second observation points are both related to the N touch points, and M1 and M2 are both a positive integers.

14. The method of claim 13, wherein in step (c), the specific touch chord is selected from a plurality of pre-stored touch chords according to combinations of M1 and M2.

15. The method of claim 13, when M1=1 and M2=1, the specific touch chord is defined single-point touch chord.

16. The method of claim 13, wherein when M1=2 and M2=2, the specific touch chord is defined first dual-point touch chord;

when M1=1 and M2=2, the specific touch chord is defined second dual-point touch chord;

when M1=2 and M2=1, the specific touch chord is defined third dual-point touch chord.

17. The method of claim 13, wherein when M1>

2 or M2>

2, the specific touch chord is defined multi-point touch chord.

18. The method of claim 13, wherein the specific moving mode is related to a movement of the M1 first observation points and the M2 second observation points.

19. The method of claim 13, wherein the specific moving mode is related to a movement of a first center position of the M1 first observation points and a second center position of the M2 second observation points following the touch gesture, the first center position is a position average value of the M1 first observation points and the second center position is a position average value of the M2 second observation points.

20. The method of claim 12, wherein the specific action is selected from one of the group of:

zoom-in, zoom-out, upward scrolling, downward scrolling, left scrolling, right scrolling, previous page, next page, previous label, and next label.