Optical sensor, output processing method of optical sensor,...

Details Optical sensor, output processing method of optical sensor,... Optical sensor, output processing method of optical sensor,...

2007-09-11

2007-09-11

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C356S218000

Reexamination Certificate

active

11103461

ABSTRACT:
An optical sensor includes a light receiving element in which a current corresponding to the amount of received light flows between one end and the other end thereof, a comparator which compares a voltage at the one end of the light receiving element with a predetermined threshold voltage to output a logical signal based on the comparison result, an initialization circuit which initializes the voltage at the one end of the light receiving element to the threshold value or a voltage approximate to the threshold voltage before detecting the amount of the received light, and a voltage changing circuit which changes the voltage at the one end of the light receiving element by a predetermined voltage after completing the initialization. In the optical sensor, after changing the voltage by the voltage changing circuit, a period until the logical signal output from the comparator is logically inverted is expressed as a value corresponding to the amount of the received light.

REFERENCES:
patent: 4556789 (1985-12-01), Shotaro et al.
patent: 5192968 (1993-03-01), Kishida et al.
patent: 6479940 (2002-11-01), Ishizuka
patent: 03170822 (1991-07-01), None
patent: A 05-018820 (1993-01-01), None
patent: A 09-082931 (1997-03-01), None
patent: A 09210778 (1997-08-01), None
patent: A 2002-176192 (2002-06-01), None
Brophy, James J.,Base Electronics for Scientists—4thEdition, p. 247, Scientist Inc., 1986. (With partial English translation.).

Affiliated with

Also associated with

Rating

Optical sensor, output processing method of optical sensor,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical sensor, output processing method of optical sensor,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical sensor, output processing method of optical sensor,... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3744083