Acoustic touch sensor with low-profile diffractive grating...

Details Acoustic touch sensor with low-profile diffractive grating... Acoustic touch sensor with low-profile diffractive grating...

2006-10-10

2006-10-10

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018040, C178S019020

Reexamination Certificate

active

07119800

ABSTRACT:
A touch sensor having an acoustic substrate, an acoustic transducer, and an acoustically diffractive grating is provided. The grating is disposed between the transducer and the substrate, so that acoustic energy from the transducer is coupled to an acoustic wave propagating along the surface of the substrate. If used in a display device, the combination of the transducer and grating may provide a low profile that allows the assembly to be more easily placed between the acoustic substrate and a bezel placed in front of the substrate. No acoustic components need be mounted on the rear surface of the substrate, allowing the acoustic substrate to be formed on the front surface of the display device.

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patent: WO 98/29853 (1998-07-01), None
International Search Report for International Application No. PCT/US2004/016908, mailed Feb. 9, 2005.

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