Method for maintaining light characteristics from a...

Details Method for maintaining light characteristics from a... Method for maintaining light characteristics from a...

2006-02-14

2006-02-14

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C362S240000

Reexamination Certificate

active

06998594

ABSTRACT:
The present invention provides a method, system and structure for maintaining light characteristics from a multi-chip LED package. This may be done by selecting a desired light output and restricting light from a plurality of light emitting diodes in the multi-chip LED package. It may also be done by measuring the restricted light, comparing the measured output light to the desired light and by adjusting current to LEDs in the multi-chip LED package based on the measured light.

REFERENCES:
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patent: 6107620 (2000-08-01), Shiba et al.
patent: 6239716 (2001-05-01), Pross et al.
patent: 6392214 (2002-05-01), Okamoto
patent: 6630801 (2003-10-01), Schuurmans
patent: 2001/0032985 (2001-10-01), Bhat et al.

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