OPTICAL TOUCH DEVICE

• US 20100328267A1
• Filed: 02/09/2010
• Published: 12/30/2010
• Est. Priority Date: 06/30/2009
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: CHEN, GA-LANE
• Application Number:
  US12/702,447
• Publication Number:
  US 20100328267A1
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/03542 Light pens for emitting or receiving light
• CPC Class Codes: G06F 3/0386 for light pen
• 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 exemplary optical touch device includes a display panel including a display surface at a front side thereof, two infrared light sources positioned on the display panel, three linear sensors positioned at three sides of the display panel respectively, a remote control, two infrared camera modules, and a receiver. The infrared light sources are configured for emitting infrared light covering the entire display surface. Each linear sensor is configured for capturing images of the infrared light reflected by any object on the display surface. The remote control is configured for projecting an infrared light spot on the display surface and generating and sending control signals according to a movement of the remote control. The two infrared camera modules are configured for capturing images of a movement track of the infrared light spot on the display surface. The receiver is configured for receiving the control signals.

Claims

1. An optical touch device, comprising:

a display panel comprising a display surface at a front side thereof;

at least one infrared light source positioned on the display panel and configured for emitting infrared light covering the entire display surface;

at least two linear sensors positioned at two adjacent sides of the display panel respectively, each linear sensor configured for capturing images of the infrared light reflected by any object on the display surface;

a remote control configured for projecting an infrared light spot on the display surface and generating and sending control signals according to a movement of the remote control;

at least one infrared camera module configured for capturing images of a movement track of the infrared light spot on the display surface; and

a receiver configured for receiving the control signals.

2. The optical touch device of claim 1, wherein the remote control comprises an infrared light emitter, a motion detecting unit and a signal emitter, the infrared light emitter configured for emitting infrared light to form the infrared light spot on the display surface, the motion detecting unit configured for detecting the movement of the remote control to generate the control signals, the signal emitter configured for sending the control signals to the receiver.

3. The optical touch device of claim 2, wherein the motion detecting unit comprises an accelerometer and a gyroscope.

4. The optical touch device of claim 2, wherein a wavelength of the infrared light emitted from the infrared light emitter is different from that of the infrared light emitted from the at least one infrared light source.

5. The optical touch device of claim 2, wherein a wavelength of the infrared light emitted from the infrared light emitter is substantially same as that of the infrared light emitted from the at least one infrared light source.

6. The optical touch device of claim 1, wherein the at least one infrared light source is an infrared light emitting diode.

7. The optical touch device of claim 1, wherein the display panel is a liquid crystal display or an organic light emitting diode display.

8. The optical touch device of claim 1, wherein the display panel is substantially rectangular, and the at least one infrared camera module is positioned at a top corner of the display panel.