OPTICAL TOUCH DISPLAY DEVICE AND METHOD

• US 20110175849A1
• Filed: 04/29/2010
• Published: 07/21/2011
• Est. Priority Date: 01/18/2010
• Status: Abandoned Application

• Current Assignee: Acer, Inc.
• Original Assignee: Acer, Inc.
• Inventors: KO, CHUEH-PIN
• Application Number:
  US12/770,707
• Publication Number:
  US 20110175849A1
• Time in Patent Office: Days
• US Class Current: 345/175
• 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

An optical touch display device includes a display screen capable of emitting an invisible light, at least one image acquisition module, and a processing module. The image acquisition module is arranged at a peripheral edge of the display screen for acquiring an invisible light image on or above a surface of the display screen. The processing module calculates a spatial position of an object according to a position of the object in the invisible light image acquired by the image acquisition module. With these arrangements, the optical touch display device can have an effectively reduced thickness and the spatial position of the object can be determined in increased accuracy. Further, the processing module can determine a user'"'"'s gesture according to the acquired invisible light image. A method for implementing optical touch display is also disclosed.

Claims

1. An optical touch display device, comprising:

a display screen including a display panel and a light source, the display panel displaying data thereon, and the light source emitting a visible light and an invisible light;

at least one image acquisition module being arranged at a peripheral edge of the display screen for acquiring an invisible light image on or above a surface of the display screen; and

a processing module for calculating a spatial position of an object based on a position of the object in the invisible light image acquired by the at least one image acquisition module.

2. The optical touch display device as claimed in claim 1, wherein a coordinate detection zone is defined on or above a surface of a display zone of the display screen, and wherein the spatial position of the object is a coordinate of the object in the coordinate detection zone.

3. The optical touch display device as claimed in claim 1, wherein the light source includes a red light emitting module, a blue light emitting module, and a green light emitting module;

and the red light emitting module has an emission wavelength ranged between 700 nm and 1400 nm.

4. The optical touch display device as claimed in claim 1, wherein the processing module determines a contour of the object according to relatively bright areas in the invisible light image, and then determines the position of the object in the invisible light image according to the contour of the object.

5. The optical touch display device as claimed in claim 1, wherein the invisible light image includes a mirror image of the object in contact with the display screen, and the processing module determines the position of the object in the invisible light image according to the mirror image.

6. The optical touch display device as claimed in claim 1, wherein the at least one image acquisition module is three in number, and the three image acquisition modules are separately arranged at an upper left corner, an upper right corner, and an upper side of the display screen.

7. The optical touch display device as claimed in claim 1, wherein the at least one image acquisition module is one in number, and the image acquisition module is arranged at an upper side of the display screen.

8. An optical touch display method, comprising the following steps:

providing a light source in a display screen, and the light source being able to emit an invisible light;

arranging at least one image acquisition module at a peripheral edge of the display screen;

using the at least one image acquisition module to acquire an invisible light image on or above a surface of the display screen; and

using a processing module to calculate a spatial position of an object based on a position of the object in the invisible light image acquired by the at least one image acquisition module.

9. The optical touch display method as claimed in claim 8, further comprising the step of defining a coordinate detection zone on or above a surface of a display zone of the display screen, and the spatial position of the object is a coordinate of the object in the coordinate detection zone.

10. The optical touch display method as claimed in claim 8, wherein the light source includes a red light emitting module, a blue light emitting module, and a green light emitting module;

and the red light emitting module has an emission wavelength ranged between 700 nm and 1400 nm.

11. The optical touch display method as claimed in claim 8, wherein the processing module determines a contour of the object according to relatively bright areas in the invisible light image, and then determines the position of object in the invisible light image according to the contour of the object.

12. The optical touch display method as claimed in claim 8, wherein the invisible light image includes a mirror image of the object in contact with the display screen, and the processing module determines the position of the object in the invisible light image according to the mirror image.

13. The optical touch display method as claimed in claim 8, wherein the at least one image acquisition module is three in number, and the three image acquisition modules are separately arranged at an upper left corner, an upper right corner, and an upper side of the display screen.

14. The optical touch display method as claimed in claim 8, wherein the at least one image acquisition module is one in number, and the image acquisition module is arranged at an upper side of the display screen.