Touch panel with improved touch position determining capability
First Claim
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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 continuously associated with the third side between the surface and the third side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer, wherein the matte surface continuously associated with the third side is rough and uneven by abrasion or etching, and wherein the material of the matte surface is as the same as the material of the substrate.
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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.
7 Citations
20 Claims
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1. A touch panel, comprising:
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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 continuously associated with the third side between the surface and the third side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer, wherein the matte surface continuously associated with the third side is rough and uneven by abrasion or etching, and wherein the material of the matte surface is as the same as the material of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing a touch panel, comprising:
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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 continuously associated with the third side between the surface and the third side, wherein the matte surface continuously associated with the third side is rough and uneven by abrasion or etching, and wherein the material of the matte surface continuously associated with the third side is as the same as the material of the substrate; providing a matte surface continuously associated with the fourth side between the surface and the fourth side, wherein the matte surface continuously associated with the fourth side is rough and uneven in surface and wherein the material of the matte surface continuously associated with the third side is as the same as the material of the substrate; 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. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A touch panel, comprising:
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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 continuously associated with the third side covering a portion of the surface and a portion of the third side for diffusing a surface acoustic wave transmitted by the X-axis transmitting transducer, wherein the matte surface continuously associated with the third side is rough and uneven in surface, and wherein the material of the matte surface is as the same as the material of the substrate. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification