Optical detection apparatus, liquid crystal display device...

Details Optical detection apparatus, liquid crystal display device... Optical detection apparatus, liquid crystal display device...

2011-08-02

2011-08-02

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S055000, C345S207000

Reexamination Certificate

active

07990359

ABSTRACT:
An optical detection apparatus includes an optical/electric converter to transduce light incident on the optical/electric converter into a current flowing to a ground potential; a current mirror to supply a mirror output voltage to a current mirror output node in response to an enable signal, the mirror output voltage having a magnitude proportional to the light intensity incident on the optical/electric converter; and a switch to connect a driving node of the current mirror to the ground potential through the optical/electric converter in response to the enable signal.

REFERENCES:
patent: 5481118 (1996-01-01), Tew
patent: 5936231 (1999-08-01), Michiyama et al.
patent: 6486726 (2002-11-01), Worley et al.
patent: 2007/0132749 (2007-06-01), Peng et al.
patent: 2008/0031031 (2008-02-01), Okuda

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