초록 ▼

A solid state image pick-up device includes a number of picture elements arranged in a matrix form. Each picture element being constituted by a MOS transistor and a photodiode, gates of the MOS transistors arranged in the vertical direction are connected to respective horizontal scanning lines which

A solid state image pick-up device includes a number of picture elements arranged in a matrix form. Each picture element being constituted by a MOS transistor and a photodiode, gates of the MOS transistors arranged in the vertical direction are connected to respective horizontal scanning lines which are connected to outputs of a horizontal shift register. Drains of the MOS transistors arranged in a horizontal direction are connected to respective vertical scanning lines both ends of which are connected to first and second signal read-out lines via first and second vertical selection switches, respectively. In the case of effecting a shutter speed control, the first and second vertical shift registers produce first and second vertical scanning pulses which are shifted by a given time period corresponding to a desired shutter open time to scan each picture element twice during each frame period. In the case of effecting a vertical contour enhancement, the shutter speed is fixed to a field period and vertically adjacent picture elements are scanned simultaneously and image signals simultaneously derived on the first and second signal read-out lines are supplied to a differential amplifier to derive a difference therebetween which is then added to the image signal on the first signal read-out line.

대표청구항 ▼

A solid state image pick-up device comprising means having a number of picture elements arranged in a matrix form, each picture element including at least one MOS transistor and a photodiode; horizontal scanning means connected to said picture elements for scanning horizontally the picture elements

A solid state image pick-up device comprising means having a number of picture elements arranged in a matrix form, each picture element including at least one MOS transistor and a photodiode; horizontal scanning means connected to said picture elements for scanning horizontally the picture elements at a given horizontal scanning period; vertical scanning means connected to said picture elements for scanning the picture elements at a given vertical scanning period; signal reading-out means including first and second signal read-out lines selectively connected to the picture elements under the control of said horizontal and vertical scanning means in such a manner that signal charges stored in the photodiodes are read-out twice within a frame period to perform a shutter function having a variable shutter open time; contour enhancing means for enhancing a contour of an image in a vertical direction by reading-out signal charges stored in two vertically adjacent photodiodes simultaneously, while said shutter open time is fixed to the frame period, to effect a contour enhancement function; and selection means for selecting one of said shutter function and contour enhancement function at will.