Method to detect a defective element

Details Method to detect a defective element Method to detect a defective element

2006-06-13

2006-06-13

Hollington, Jermele (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Cathode ray

Reexamination Certificate

active

07061226

ABSTRACT:
The present invention relates to a method to detect at least one defective pixel in a spatial light modulator comprising numerous pixel elements. The spatial light modulator is imaged to a detector. A relayed image of a first chess-board pattern of pixels in said spatial light modulator is detected by said detector. A relayed image of a second chess-board pattern of pixels in said spatial light modulator is detected, which is inverted to the first chessboard pattern, by said detector. The relayed images of said first and second chessboard patterns are analyzed to detect differences between said detected images and theoretical images thereof.

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Larry J. Hornbeck “From Cathode Rays to Digital Micromirrors: A History of Electronic Projection Display Technology” Digital Light Processing—Introduction TI Technical Journal Jul.-Sep. 1998 pp. 7-45.

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