Acoustic touch apparatus with variable thickness substrate
First Claim
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1. An acoustic touch apparatus, comprising a substrate, having top and bottom surfaces, that is adapted in a first region to propagating surface acoustic waves along substrate surfaces and in a second region to transferring propagating surface acoustic waves from the one of the surfaces to the other surface through the substrate via top-bottom oscillation;
- at least one acoustic wave transducer on the bottom surface that is adapted to transmit surface acoustic waves; and
at least one acoustic wave transducer on the bottom surface that is adapted to receive surface acoustic waves from the transmitting transducer, said substrate having, between the transmitting transducer and the receiving transducer, at least one first region disposed between two second regions.
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Abstract
An acoustic touch apparatus that has a variable thickness glass substrate that permits the transfer of surface acoustic waves between the back and front surfaces, thus enabling transducers to be placed on the substrate surface opposite the desired touch input surface.
4 Citations
22 Claims
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1. An acoustic touch apparatus, comprising a substrate, having top and bottom surfaces, that is adapted in a first region to propagating surface acoustic waves along substrate surfaces and in a second region to transferring propagating surface acoustic waves from the one of the surfaces to the other surface through the substrate via top-bottom oscillation;
- at least one acoustic wave transducer on the bottom surface that is adapted to transmit surface acoustic waves; and
at least one acoustic wave transducer on the bottom surface that is adapted to receive surface acoustic waves from the transmitting transducer, said substrate having, between the transmitting transducer and the receiving transducer, at least one first region disposed between two second regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- at least one acoustic wave transducer on the bottom surface that is adapted to transmit surface acoustic waves; and
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12. An acoustic touch apparatus, comprising:
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a. a substrate that has top and bottom surfaces and that is adapted in a first region to propagating surface acoustic waves along substrate surfaces and in a second region to transferring propagating surface acoustic waves from the one of the surfaces to the other surface through the substrate via top-bottom oscillation; b. at least one acoustic wave transducer on the bottom surface that is adapted to transmit surface acoustic waves; c. at least one acoustic wave transducer on the bottom surface that is adapted to receive surface acoustic waves; d. at least one reflective array on the bottom surface that is adapted to reflect the surface acoustic waves from the transmitting transducer towards the receiving transducer; and e. at least one reflective array on the bottom surface that is adapted to receive and reflect the reflected transmitted surface acoustic waves to the receiving transducer, said substrate having, between the transmitting transducer and the receiving transducer, at least one first region disposed between two second regions. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification