Apparatus for controlling exposure of a solid state image sensor array
First Claim
1. Apparatus for controlling the exposure of a solid state image sensor array of the type which includes a photosensitive semiconductive substrate having disposed on one surface thereof a plurality of photosites, said apparatus comprising means for producing a signal representative of the substrate current resulting from an imagewise exposure of said photosites, means for integrating said signal to provide a ramp signal having an instantaneous amplitude representative of the instantaneous average exposure of said photosites, and means responsive to said ramp signal for controlling the exposure of said sensor array.
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Accused Products
Abstract
An apparatus for controlling the exposure of a solid state image sensor array monitors the semiconductor substrate current produced as charge signal accumulates during an exposure of the array to radiant energy. The exposure of the array is controlled in response to an output signal representative of the total substrate current.
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Citations
8 Claims
- 1. Apparatus for controlling the exposure of a solid state image sensor array of the type which includes a photosensitive semiconductive substrate having disposed on one surface thereof a plurality of photosites, said apparatus comprising means for producing a signal representative of the substrate current resulting from an imagewise exposure of said photosites, means for integrating said signal to provide a ramp signal having an instantaneous amplitude representative of the instantaneous average exposure of said photosites, and means responsive to said ramp signal for controlling the exposure of said sensor array.
Specification