Light intensity detecting methods and devices, display...

Details Light intensity detecting methods and devices, display... Light intensity detecting methods and devices, display...

2009-05-27

2011-11-08

Nguyen, Sang (Department: 2886)

Optics: measuring and testing

Photometers

C250S205000, C250S2140DC

Reexamination Certificate

active

08054457

ABSTRACT:
A light intensity detecting device is provided to detect a light intensity according to pulse duration of a pulse signal without being affected by noise, including: a time measuring unit for measuring an elapsed time period of the pulse signal that has been raised; a signal state discriminating unit for obtaining a state of the pulse signal; a sampling unit for directing the signal state discriminating unit to obtain the state at a sampling interval corresponding to the elapsed time period; and a falling detecting unit for detecting the pulse signal that has been fallen when a fallen state of the pulse signal is successively obtained for two times. When the fallen pulse signal is detected, the sampling unit directs the signal state discriminating unit to obtain the state of the pulse signal at a time point, which is output as the pulse duration of the pulse signal.

REFERENCES:
patent: 4958707 (1990-09-01), Yoneda et al.
patent: 5289167 (1994-02-01), Kurosawa et al.
patent: 5376992 (1994-12-01), Hasegawa et al.
patent: 5479118 (1995-12-01), Niijima
patent: 6456134 (2002-09-01), Niijima
patent: 7075047 (2006-07-01), Noguchi et al.
patent: 2001-027656 (2001-01-01), None
patent: 2001-522058 (2001-11-01), None
patent: 2005-345286 (2005-12-01), None
patent: 2007-256057 (2007-10-01), None

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