Television – Camera – system and detail – Solid-state image sensor
Reexamination Certificate
2011-04-26
2011-04-26
Hernández Hernández, Nelson D. (Department: 2622)
Television
Camera, system and detail
Solid-state image sensor
C348S296000
Reexamination Certificate
active
07932947
ABSTRACT:
An output compensating device of an image sensor using a number of light-sensor circuits, each of which represents a unit pixel and works by producing in a photoelectric converting element a sensor current proportional to a quantity of light falling thereon, converting the current into a voltage signal by using sub-threshold region characteristic of a transistor having a logarithmic output characteristic in a weak inverse state, which enables the image sensor to compensate for variations in each pixel output by using a sensor signal obtainable when changing a gate voltage and drain voltage of the transistor with shut-off light falling on the photoelectric converting element to a value lower than normal voltages of the transistor for taking video. This enables the image sensor to easily compensate for variations in output characteristics of respective light sensor circuits in a pseudo output state created therein with no actual light falling thereon.
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Nakajima Atsushi
Shinotsuka Sukeyuki
Wanatabe Hironari
Fulbright & Jaworski L.L.P.
Hernández Nelson D. Hernández
Honda Giken Kogyo Kabushiki Kaisha
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