OPTICAL DIODE LASER TOUCH-CONTROL DEVICE

• US 20100045634A1
• Filed: 08/20/2009
• Published: 02/25/2010
• Est. Priority Date: 08/21/2008
• Status: Abandoned Application

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: WEI, TSAI-KUEI, SU, SHENG-PIN
• Application Number:
  US12/544,607
• Publication Number:
  US 20100045634A1
• Time in Patent Office: Days
• 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 diode laser touch-control device includes two light emitters and a plurality of receivers around a touch-acting area of a touch panel. The light emitters are disposed on two adjacent corners of the touch panel in the touch-acting area, and each employs a diode laser to continuously project a diffused light through a lens for covering the touch-acting area to form an interlaced touch screen. The receivers, which are capable of receiving the diffused light, are disposed on the touch panel around the touch-acting area to receive the diffused light. As a finger touches the touch-acting area of the touch panel, a part of the diffused light is blocked from being projected onto the receivers, and the touch position of the touch-acting area may be calculated accordingly.

Claims

1. An optical diode laser touch-control device, comprising:

a touch panel having a touch-acting area;

two light emitters disposed on two adjacent corners of the touch panel respectively, each said light emitter comprising;

a diode laser integrated in the corresponding light emitter by a semiconductor packaging technology; and

a lens integrated in the corresponding light emitter by the semiconductor packaging technology and being arranged between the diode laser and the touch-acting area, light emitted continuously from the diode laser being refracted by the lens to emit a diffused light to cover the touch-acting area for forming an interlaced touch screen; and

a plurality of receivers, which are capable of receiving the diffused light and disposed on the touch panel around the touch-acting area to receive the diffused light.

2. The device as set forth in claim 1, wherein a cross section of the lens represents a cambered profile to make the diffused light a straight line.

3. The device as set forth in claim 1, wherein a cross section of the lens represents a plurality of cambered profiles to make the diffused light a dashed line.

4. The device as set forth in claim 1, wherein the lens is a Fresnel lens to make the diffused light a dotted line.

5. The device as set forth in claim 1, wherein the diffused light is invisible light comprising infrared light or ultraviolet light.

6. The device as set forth in claim 1, wherein the receivers are arranged around the touch-acting area in a U shape.

7. The device as set forth in claim 1, wherein light emitted continuously from the diode lasers is refracted by the lenses to emit a diffused light to cover entirely the touch-acting area for forming an interlaced touch screen.

8. An optical diode laser touch-control device, comprising:

a touch panel having a touch-acting area;

two diode lasers disposed on two adjacent corners of the touch panel respectively; and

two lenses, each being arranged between one of the diode lasers and the touch-acting area respectively and being integrated with the diode laser by a semiconductor packaging technology, light emitted continuously from the diode laser being refracted by the lens to emit a diffused light to cover the touch-acting area for forming an interlaced touch screen.

9. The device as set forth in claim 8, further comprising a plurality of receivers, which are capable of capturing the diffused light for processing, disposed on the touch panel around the touch-acting area to receive the diffused light.

10. The device as set forth in claim 8, wherein a cross section of the lens represents a cambered profile to make the diffused light a straight line.

11. The device as set forth in claim 8, wherein a cross section of the lens represents a plurality of cambered profiles to make the diffused light a dashed line.

12. The device as set forth in claim 8, wherein the lens is a Fresnel lens to make the diffused light a dotted line.

13. The device as set forth in claim 8, wherein the diffused light is invisible light comprising one or more of infrared light and ultraviolet light.

14. The device as set forth in claim 8, wherein the receivers are arranged around the touch-acting area in a U shape.

15. An optical diode laser touch-control device, comprising:

a touch panel having a touch-acting area;

two light emitters disposed in proximity to two adjacent corners of the touch panel respectively, each continuously emitting a diffused light to cover the touch-acting area for forming an interlaced touch screen; and

a plurality of receivers disposed on the touch panel around the touch-acting area to receive the diffused light.

16. The device as set forth in claim 15, wherein the diffused light represents a straight line, a dashed line or a dotted line.

17. The device as set forth in claim 15, wherein the diffused light is invisible light comprising infrared light or ultraviolet light.

18. The device as set forth in claim 15, wherein the receivers are arranged around the touch-acting area in a U shape.

19. The device as set forth in claim 15, the two light emitters being disposed on two adjacent corners of the touch panel.

20. The device as set forth in claim 15, further comprising a signal processor, whereby each of the receivers is capable of capturing the diffused light and converting it to a signal suitable for performance of a calculation by the signal processor using a triangulation method.