Solid-state image pickup device operable at a frame rate with a controllable accumulating time interval
First Claim
1. A solid-state image pickup device comprising:
- a solid-state image pickup section comprising;
a substrate;
a plurality of photoelectric converting sections formed on the substrate and arranged in a matrix with m rows and n columns, said plurality of photoelectric converting sections for accumulating, in response to incident light, electric charges during a controllable accumulating time interval in each frame period as signal charges synchronized with a frame rate, where m and n represent first and second positive integers each of which is at least two; and
electronic shutter means, connected to the substrate, for discarding unused charges during a discarding time interval in the frame period from the photoelectric converting sections to the substrate, the discarding time interval being equal to a difference between the frame period and the controllable accumulating time interval; and
control means, connected to said solid-state image pickup section, for controlling the controllable accumulating time interval for picking up an image on a screen of a display device having a vertical scanning rate which is higher than the frame rate, the controllable accumulating time interval matching with a vertical scanning period which is the reciprocal of the vertical scanning rate in the display device.
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Accused Products
Abstract
In a solid-state image pickup device comprises a solid-state image pickup section (10) including a substrate and a plurality of photoelectric converting sections formed on the substrate, the photoelectric converting sections accumulates, in response to incident light, electric charges during a controllable accumulating time interval in each frame period as signal charges in synchronism with a frame rate. Connected to the substrate, electronic shutter means discards disused charges during a discarding time interval in the frame period from the photoelectric converting sections to the substrate. The discarding time interval is equal to a difference between the frame period and the controllable accumulating time interval. Connected to the solid-state image pickup section, a timing pulse generating section (20) controls the controllable accumulating time interval.
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Citations
16 Claims
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1. A solid-state image pickup device comprising:
a solid-state image pickup section comprising; a substrate; a plurality of photoelectric converting sections formed on the substrate and arranged in a matrix with m rows and n columns, said plurality of photoelectric converting sections for accumulating, in response to incident light, electric charges during a controllable accumulating time interval in each frame period as signal charges synchronized with a frame rate, where m and n represent first and second positive integers each of which is at least two; and electronic shutter means, connected to the substrate, for discarding unused charges during a discarding time interval in the frame period from the photoelectric converting sections to the substrate, the discarding time interval being equal to a difference between the frame period and the controllable accumulating time interval; and
control means, connected to said solid-state image pickup section, for controlling the controllable accumulating time interval for picking up an image on a screen of a display device having a vertical scanning rate which is higher than the frame rate, the controllable accumulating time interval matching with a vertical scanning period which is the reciprocal of the vertical scanning rate in the display device.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of picking up an image on a screen of a display device by a solid-state image pickup device comprising a solid-state image pickup section, comprising the steps:
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accumulating, in response to incident light, electric charges during a controllable accumulating time interval in each frame period as signal charges synchronized with a frame rate; discarding unused charges during a discarding time interval in the frame period, the discarding time interval being a difference between the frame period and the controllable accumulating time interval; scanning said display device at a vertical scanning rate higher than the frame rate; and controlling the controllable accumulating time interval so that the controllable accumulating time interval is equal to a vertical scanning period which is the reciprocal of the vertical scanning rate. - View Dependent Claims (10, 11, 12)
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13. A method of picking up an image on a screen of a display device by a solid-state image pickup device comprising a solid-state image pickup section including a plurality of photoelectric converting sections, comprising the steps of:
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accumulating, in response to incident light, electric charges during a controllable accumulating time interval in each frame period as signal charges synchronized with a frame rate; discarding unused charges during a discarding time interval in the frame period from the photoelectric converting sections, the discarding time interval being a difference between the frame period and the controllable accumulating time interval; scanning said display device at a vertical scanning rate higher than the frame rate and lower than a field rate of a National Television System Committee (NTSC) system; and controlling the controllable accumulating time interval so that the controllable accumulating time interval is equal to a vertical scanning period which is the reciprocal of the vertical scanning rate. - View Dependent Claims (14, 15, 16)
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Specification