Self-calibrated integration method of light intensity...

Details Self-calibrated integration method of light intensity... Self-calibrated integration method of light intensity...

2007-05-06

2009-08-04

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S294000, C315S308000, C345S076000, C345S082000, C345S102000

Reexamination Certificate

active

07569997

ABSTRACT:
This invention is an LED lighting intensity control by subdivision of PWM intervals to resolve the wavelength and luminance shifting problems that are caused by increasing heat and junction temperatures.

REFERENCES:
patent: 6211626 (2001-04-01), Lys et al.
patent: 7221104 (2007-05-01), Lys et al.
patent: 2003/0020677 (2003-01-01), Nakano
patent: 2003/0043133 (2003-03-01), Tzelnick
patent: 2003/0085854 (2003-05-01), Tsuji
patent: 2006/0221046 (2006-10-01), Sato et al.
patent: 2008/0018575 (2008-01-01), Kobayashi et al.
patent: 2008/0042936 (2008-02-01), Wang

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