Optical scanner with light quantity compensation

Details Optical scanner with light quantity compensation Optical scanner with light quantity compensation

G - Physics

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G03G 15/04 (2006.01) B41J 2/44 (2006.01) G06K 15/12 (2006.01) H04N 1/04 (2006.01) H04N 1/23 (2006.01)

Patent

CA 1326056

ABSTRACT An optical beam apparatus includes a light emission device, a driver for driving the light emission device with the applied VIDEO signal, an integral circuit for estimating a drop of the quantity of light emitted by the light emission device from the VIDEO signal applied, and a light output control circuit for controlling the driver in compliance with the estimated result so that the quantity of light emitted by the light emission device becomes constant.

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