Image sensor with digital output and inherent pixel...

Details Image sensor with digital output and inherent pixel... Image sensor with digital output and inherent pixel...

2007-05-15

2007-05-15

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

Reexamination Certificate

active

10610091

ABSTRACT:
The image sensing device provides a digital output for each pixel. As charge builds up in a pixel, the pixel output increases until it reaches a reference level. When the reference level is crossed the pixel is reset. This process is repeated several times in a given frame time cycle with the reference level steadily decreasing. The various reset times represent the light intensity on the pixel. For an image sensor array, the array is scanned multiple times during one image frame time cycle and the reference level is lowered each scan. This provides an image sensor that has built-in pixel non-uniformity suppression, digital output, and high sensitivity.

REFERENCES:
patent: 5461425 (1995-10-01), Fowler et al.
patent: 5650739 (1997-07-01), Hui et al.
patent: 6229133 (2001-05-01), Hynecek
patent: 7071982 (2006-07-01), Luo et al.
patent: 7098437 (2006-08-01), Ishikawa et al.
patent: 2002/0176067 (2002-11-01), Charbon

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