Optical microphone for communication and other devices

Optical waveguides – Illuminating or display apparatus

Reexamination Certificate

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Details

C385S007000, C381S172000

Reexamination Certificate

active

06865335

ABSTRACT:
A lightwaveguide panel to be used with a a mobile telephone (MT) or personal digital assistant (PDA), the pannel comprises a first portion for lighting an LCD and/or a keyboard, and a second integral portion, said second portion including a first inclined surface for directing light from a source of light onto a light-reflecting acoustically responsive membrane, and a second inclined surface for directing light from said membrane onto a photo-detector.

REFERENCES:
patent: 4924085 (1990-05-01), Kato et al.
patent: 0866312 (1998-09-01), None
patent: 1191812 (2002-03-01), None
patent: WO 2087278 (2002-10-01), None

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