Photoelectric sensor unit including automatic control...

Details Photoelectric sensor unit including automatic control... Photoelectric sensor unit including automatic control...

2005-05-10

2005-05-10

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S2140AG

Reexamination Certificate

active

06891142

ABSTRACT:
A photoelectric sensor unit comprises a light emitting section for emitting light to a detection area, a light receiving section for receiving light from the detection area, and a signal processing section for amplifying and processing an electric signal corresponding to the light reception amount output from the light receiving section. A four-element, high-brightness type LED is used as a light emitting element forming a part of the light emitting section and a drive circuit comprises an automatic control circuit for reducing fluctuation in the light emission amount relative to change in the ambient temperature of the LED.

REFERENCES:
patent: 4998043 (1991-03-01), Unami et al.
patent: 5008718 (1991-04-01), Fletcher et al.
patent: 5026978 (1991-06-01), Misumi et al.
patent: 5635733 (1997-06-01), Okagawa et al.
patent: 8-228022 (1996-09-01), None
patent: 9-329670 (1997-12-01), None
patent: 11-87769 (1999-03-01), None

Affiliated with

Also associated with

Rating

Photoelectric sensor unit including automatic control... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photoelectric sensor unit including automatic control..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectric sensor unit including automatic control... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3397483