Switching converter for lighting with light intensity as...

Details Switching converter for lighting with light intensity as... Switching converter for lighting with light intensity as...

2011-06-21

2011-06-21

Le, Don P (Department: 2819)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Plural load device regulation

C315S127000

Reexamination Certificate

active

07965048

ABSTRACT:
A light emitting apparatus comprises a light emitting element and a switching converter comprising a conversion circuit for converting an operating electric signal to generate the driving electric signal, a feedback circuit having a light detecting element for detecting a luminous intensity of the light emitting element and generating a feedback signal, and a control circuit for receiving the feedback signal, comparing the received feedback signal with a reference electric signal, and controlling the conversion circuit based on comparison results to adjust the driving electric signal. Alternatively, the light detecting element detects ambient light and the control circuit controls the conversion circuit based on comparison results to stop or enable outputting of the driving electric signal.

REFERENCES:
patent: 6095661 (2000-08-01), Lebens et al.
patent: 6611610 (2003-08-01), Stam et al.
patent: 7511695 (2009-03-01), Furukawa et al.
patent: 7638754 (2009-12-01), Morimoto et al.
patent: 7740371 (2010-06-01), Lebens et al.

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