Illuminance sensor determining the duty ratio of a PWM...

Details Illuminance sensor determining the duty ratio of a PWM... Illuminance sensor determining the duty ratio of a PWM...

2008-01-29

2009-06-30

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S214100

Reexamination Certificate

active

07554065

ABSTRACT:
The following members are included: a light receiving element which outputs an electric signal corresponding to ambient light; an A/D converter which converts the electric signal output from the light receiving element into a digital signal; a register which stores the digital signal output from the A/D converter and determines the duty ratio of a PWM signal based on the digital signal; and a PWM controller which outputs the PWM signal based on the duty ratio output from the register.

REFERENCES:
patent: 2004/0069931 (2004-04-01), Stam et al.
patent: 2005/0057484 (2005-03-01), Diefenbaugh et al.
patent: 2005/0276080 (2005-12-01), Okada
patent: 2006/0151678 (2006-07-01), Shibata
patent: 63-309826 (1988-12-01), None
patent: 3-21829 (1991-01-01), None
patent: 09-145468 (1997-06-01), None
patent: 10-023335 (1998-01-01), None
patent: 10-142047 (1998-05-01), None
patent: 2004-022646 (2004-01-01), None
patent: 2004-233569 (2004-08-01), None
patent: 2006-194612 (2006-07-01), None

Affiliated with

Also associated with

Rating

Illuminance sensor determining the duty ratio of a PWM... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illuminance sensor determining the duty ratio of a PWM..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illuminance sensor determining the duty ratio of a PWM... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4140736