Real-time exposure control for automatic light control

Details Real-time exposure control for automatic light control Real-time exposure control for automatic light control

2004-05-17

2009-10-20

Misleh, Justin P (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S229100, C348S362000

Reexamination Certificate

active

07605852

ABSTRACT:
An imager and a method for real-time, non-destructive monitoring of light incident on imager pixels during their exposure to light. Real-time or present pixel signals, which are indicative of present illumination on the pixels, are compared to a reference signal during the exposure. Adjustments, if necessary, are made to programmable parameters such as gain and/or exposure time to automatically control the imager's exposure to the light. In a preferred exemplary embodiment, only a selected number of pixels are monitored for exposure control as opposed to monitoring the entire pixel array.

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patent: WO 2004/082472 (2004-09-01), None
Bo-Rong Lin et al., “A High Dynamic Range CMOS Image Sensor Design Based on Two-Frame Composition”, Electrical Engineering Department, National Tsing-Hua University.
Orly Yadid-Pect, et al., “Wide Intrascene Dynamic Range CMOS APS Using Dual Sampling”, IEEE Transactions on Electron Devices, vol. 33, No. 10, Oct. 1997.
David Stoppa et al., “Novel CMOS Image Sensor With a 132-dB Dynamic Range”, IEEE Journal of Solid-State Circuits, vol. 37, No. 12, Dec. 2002.

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