Solid-state image sensor with exposure controller
First Claim
1. A two-dimensional solid-state image sensor comprising:
- a photoelectric converter having a plurality of non-destructive readout type image sensor cells arranged in a predetermined form for exposure to a light pattern and for storing a charge in at least some of said cells related to the light pattern to form stored information which is not destroyed by reading out the stored information;
an exposure detector connected to the photoelectric converter for reading out the stored information of a plurality of predetermined ones of the cells during the exposure, for obtaining an added value of the stored information thus read out and for detecting when the added value reaches a predetermined level to form a detected signal;
an exposure controller connected to the exposure detector for being supplied with the detected signal from the exposure detector to control at least one of;
a charge storage time of each image sensor cell, the intensity of light incident on the image sensor cells and a photosensitivity of the image sensor cells, to terminate the building of charge in the cells; and
a scanner connected to the photoelectric converter for scanning the photoelectric converter to read out the stored information of the image sensor cells after the building of charge has been terminated.
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Accused Products
Abstract
A solid-state image sensor which detects the quantity of light incident on image sensor cells during exposure and performs exposure control in accordance with an exposure value thus obtained. The solid-state image sensor is provided with a photoelectric converter having a plurality of non-destructive readout type image sensor cells arranged in a matrix form; an exposure detector for reading out stored information of predetermined ones of the image sensor cells during exposure, obtaining an added value of the stored information thus read out and detecting that the added value reaches a predetermined level; an exposure controller which is supplied with the detected signal from the exposure detector to control at least one of the charge storage time of each image sensor cell by an optical signal, the intensity of light incident on the image sensor cell and the photosensitivity of the image sensor cell; and a scanner for scanning the photoelectric converter to read out stored information of the image sensor cells during exposure.
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Citations
5 Claims
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1. A two-dimensional solid-state image sensor comprising:
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a photoelectric converter having a plurality of non-destructive readout type image sensor cells arranged in a predetermined form for exposure to a light pattern and for storing a charge in at least some of said cells related to the light pattern to form stored information which is not destroyed by reading out the stored information; an exposure detector connected to the photoelectric converter for reading out the stored information of a plurality of predetermined ones of the cells during the exposure, for obtaining an added value of the stored information thus read out and for detecting when the added value reaches a predetermined level to form a detected signal; an exposure controller connected to the exposure detector for being supplied with the detected signal from the exposure detector to control at least one of;
a charge storage time of each image sensor cell, the intensity of light incident on the image sensor cells and a photosensitivity of the image sensor cells, to terminate the building of charge in the cells; anda scanner connected to the photoelectric converter for scanning the photoelectric converter to read out the stored information of the image sensor cells after the building of charge has been terminated. - View Dependent Claims (2, 3, 4, 5)
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Specification