METHOD AND DEVICE FOR CONVERTING SENSING INFORMATION

• US 20110096038A1
• Filed: 12/10/2010
• Published: 04/28/2011
• Est. Priority Date: 06/27/2006
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: YEH, SHANG-TAI
• Granted Patent: US 8,847,926 B2
• Time in Patent Office: Days
• US Class Current: 345/177
• CPC Class Codes: G06F 3/0436 in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A surface acoustic wave (SAW) touch panel with improved touching precision is provided. By forming a matte surface that diffuses a back wave generated by the edge of the SAW touch panel due to discontinuity, the touching precision of the SAW touch panel is improved.

Claims

1. A touch panel, comprising:

a substrate having a first side, a second side, a third side, and a fourth side, each having two ends and together defining a surface;

an X-axis transmitting transducer located near one end of the first side on the surface;

an X-axis receiving transducer located near the other end of the first side on the surface;

a Y-axis transmitting transducer located near one end of the second side on the surface; and

a Y-axis receiving transducer located near the other end of the second side on the surface,

wherein the substrate comprises a matte surface between the surface and the third side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer.

2. The touch panel as claimed in claim 1, wherein the third matte surface comprises an inclined surface.

3. The touch panel as claimed in claim 1, wherein the third matte surface comprises a rounded surface.

4. The touch panel as claimed in claim 1, wherein the substrate further comprises the matte surface between the surface and the fourth side for diffusing the surface acoustic wave transmitted by the Y-axis transmitting transducer.

5. The touch panel as claimed in claim 1, wherein the substrate further comprises the matte surface between the surface and the first side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer.

6. The touch panel as claimed in claim 1, wherein the substrate further comprises the matte surface between the surface and the second side for diffusing a surface acoustic wave transmitted by the Y-axis transmitting transducer.

7. The touch panel as claimed in claim 1, wherein the substrate comprises reflecting stripes arranged on the surface.

8. A method for manufacturing a touch panel, comprising:

providing a substrate having a first side, a second side, a third side, and a fourth side, each having two ends and together defining a surface;

providing a matte surface between the surface and the third side;

providing the matte surface between the surface and the fourth side;

providing reflecting stripes arranged on the surface;

providing an X-axis transmitting transducer located near one end of the first side on the surface;

providing an X-axis receiving transducer located near the other end of the first side on the surface;

providing a Y-axis transmitting transducer located near one end of the second side on the surface; and

providing a Y-axis receiving transducer located near the other end of the second side on the surface.

9. The method as claimed in claim 8, wherein the matte surface comprises an inclined surface.

10. The touch panel as claimed in claim 8, wherein the matte surface comprises a rounded surface.

11. The touch panel as claimed in claim 8, wherein the substrate further comprises the matte surface between the surface and the first side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer.

12. The touch panel as claimed in claim 8, wherein the substrate further comprises a matte surface between the surface and the second side for diffusing a surface acoustic wave transmitted by the Y-axis transmitting transducer.

13. The touch panel as claimed in claim 8, wherein the substrate comprises reflecting stripes arranged on the surface.

14. A touch panel, comprising:

a substrate having a first side, a second side, a third side, and a fourth side, each having two ends and together defining a surface;

an X-axis transmitting transducer located near one end of the first side on the surface;

an X-axis receiving transducer located near the other end of the first side on the surface;

a Y-axis transmitting transducer located near one end of the second side on the surface; and

a Y-axis receiving transducer located near the other end of the second side on the surface,

wherein the substrate comprises a matte surface covering a portion of the surface and the a portion of the third side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer.

15. The touch panel as claimed in claim 14, wherein the third matte surface comprises an inclined surface.

16. The touch panel as claimed in claim 14, wherein the third matte surface comprises a rounded surface.

17. The touch panel as claimed in claim 14, wherein the substrate further comprises the matte surface covering a portion of the surface and a portion of the fourth side for diffusing the surface acoustic wave transmitted by the Y-axis transmitting transducer.

18. The touch panel as claimed in claim 14, wherein the substrate further comprises the matte surface covering a portion of the surface and a portion of the first side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer.

19. The touch panel as claimed in claim 14, wherein the substrate further comprises the matte surface between a portion of the surface and a portion of the second side for diffusing a surface acoustic wave transmitted by the Y-axis transmitting transducer.

20. The touch panel as claimed in claim 14, wherein the substrate comprises reflecting stripes arranged on the surface.