Exposure control of image input apparatus
AssigneeCanon Kabushiki Kaisha
InventorMakoto Hiramatsu
Life of this patent
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Abstract
An image input apparatus that includes a solid-state image sensing device having a plurality of pixels; a shutter having a front curtain and a rear curtain for opening and blocking an optical path to the solid-state image sensing device; a shutter-curtain sensor that senses passage of the front and rear curtains at a plurality of positions; and a reset unit that resets pixels of the solid-state image sensing device successively before the sensor senses passage of the rear curtain upon elapse of a prescribed period of time after the sensor senses passage of said front curtain.
Claims6
An image input apparatus comprising:
- a solid-state image sensing device having a plurality of lines of pixels;
- a shutter having a front curtain and a rear curtain for opening and blocking an optical path to the solid-state image sensing device;
- a plurality of sensors provided at a plurality of positions corresponding to said plurality of lines of pixels of said solid-state image sensing device, each one of said plurality of sensors being configured to detect passage of said front and rear curtains;
- and
- a reset unit configured to reset each line of pixels of the solid-state image sensing device,
- wherein each line of pixels is reset after a predetermined period of time has elapsed since a corresponding sensor detected the passage of the front curtain and before the corresponding sensor detects the passage of the rear curtain.
A method of controlling an image input apparatus that includes a solid-state image sensing device having a plurality of lines of pixels, a shutter having a front curtain and a rear curtain for opening and blocking an optical path to the solid-state image sensing device, and a plurality of sensors provided at a plurality of positions corresponding to said plurality of lines of pixels of said solid-state image sensing device, each of said plurality of sensors being configured to detect passage of said front and rear curtains, said method comprising:
- detecting passage of the front and rear curtains with each one of said plurality of sensors;
- and
- resetting each line of pixels of the solid-state image sensing device,
- wherein each line of pixels is reset after a predetermined period of time has elapsed since a corresponding sensor detected the passage of the front curtain and before the corresponding sensor detects the passage of the rear curtain.
Dependencies are inferred from the claim text.