Light detector having light sensor and light indicator, and cont

Details Light detector having light sensor and light indicator, and cont Light detector having light sensor and light indicator, and cont

1988-06-16

1989-12-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356224, G01J 132

Patent

active

048869619

ABSTRACT:
A light detector which indicates decrease in the level of ambient light below a prescribed value. The light detector includes a light indicator for radiating light when the level of ambient light decreases below the prescribed value, a light sensor arranged parallel to the light indicator for receiving actual light including ambient light and light from the light indicator for outputting a detection signal corresponding to a level of actual light, and a control circuit for evading effect of the light from the light indicator for controlling the operation of the light indicator while ambient light is below the prescribed level even though the actual light received by the light sensor increases above the prescribed level.

REFERENCES:
patent: 3946241 (1976-03-01), Malinowski
patent: 4320289 (1982-03-01), White et al.
patent: 4346331 (1982-08-01), Hoge
patent: 4443057 (1984-04-01), Bauer et al.
patent: 4514727 (1985-04-01), Van Antwerp
patent: 4645919 (1987-02-01), McCaleb
patent: 4681432 (1987-07-01), Kawabata et al.

Affiliated with

Also associated with

Rating

Light detector having light sensor and light indicator, and cont does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light detector having light sensor and light indicator, and cont, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light detector having light sensor and light indicator, and cont will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2122964