Maintaining stable optical output of solid state illumination system

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11307241
APP PUB NO 20210037624A1
SERIAL NO

16964020

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Abstract

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A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

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Patent Owner(s)

  • EXCELITAS CANADA, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Constantinou, Paul Burlington, CA 11 27
MacDonald, Douglas Milton, CA 55 1413
Sorensen, Erik Mississauga, CA 16 247
Wang, Yong Markham, CA 993 8736

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