Apparatus for testing a light emitting device, and a method...

Details Apparatus for testing a light emitting device, and a method... Apparatus for testing a light emitting device, and a method...

2006-06-06

2006-06-06

Sember, Thomas M. (Department: 2875)

Illumination

Light fiber, rod, or pipe

Light emitting diode

C362S554000, C250S208100, C250S226000

Reexamination Certificate

active

07056000

ABSTRACT:
A text fixture (1) comprises apparatus (4) for verifying the color and brightness of light emitted from LEDs (5) of a printed circuit board (3). A base (6) of the fixture (1) supports the printed circuit board (3) during testing. A mounting panel (14) locates ends (15) of a plurality of optical fibers (10) adjacent the LEDs (5) on the printed circuit board (3), and ends (21) of ht optical fibers (10) are terminated in a terminating panel (20) adjacent an image sensing panel (11). The image sensing panel (11) comprises an array of individually addressable light and color sensitive pixels (25) onto which light from the optical fibers (10) is incident. An analysing circuit (12) scans the pixels (25) for determining the brightness values and the tristimulus values of the incident light, and a control circuit (9) compares the tristimulus values and brightness values with reference tristimulus and brightness values for verifying the color and brightness of the light emitted by the respective LEDs (5).

REFERENCES:
patent: 4775640 (1988-10-01), Chan
patent: 4808815 (1989-02-01), Langley
patent: 0 285 493 (1988-10-01), None

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