Focusing-shaped reflector arrays for acoustic touchscreens

Details Focusing-shaped reflector arrays for acoustic touchscreens Focusing-shaped reflector arrays for acoustic touchscreens

2007-09-25

2007-09-25

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S173000, C178S018040

Reexamination Certificate

active

10752935

ABSTRACT:
An acoustic touchscreen having a substrate capable of propagating acoustic waves, the substrate having a touch-sensitive area, and an array of acoustically reflective elements lying in or on the substrate are positioned to transmit or receive acoustic signals into or out of the touch-sensitive area, the elements having a focusing shape that provides waveguide functionality, i.e., focusing the acoustic wave energy to a narrow area along a center line of the array axis, without requiring a further waveguide core structure.

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European Search Report for European Application No. 05100046.1, mailed Oct. 16, 2006.

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