초록 ▼

An image sensing device for a TV camera and method of driving the same is disclosed whereby the effective charge accumulation time in each light-sensing row in the imaging area can be reduced thereby eliminating fuzzy images produced when fast moving objects are picked up. The driving circuit of the

An image sensing device for a TV camera and method of driving the same is disclosed whereby the effective charge accumulation time in each light-sensing row in the imaging area can be reduced thereby eliminating fuzzy images produced when fast moving objects are picked up. The driving circuit of the imaging device gives the sensor a shutter function of less than 1/60 second and up to 1/2000 second exposure time without changing the structure of the sensor. There is provided a method in which charges accumulated in each row of the light-sensing elements are taken out and discarded at an optional time during an active video period, leaving an effective charge accumulation period of less than 1/60 second.

대표청구항 ▼

An image sensor comprising a plurality of photodiode arrays, each of said photodiode arrays containing first photodiodes designated for an odd television field and second photodiodes designated for an even television field, said first photodiodes and said second photodiodes being alternately arrange

An image sensor comprising a plurality of photodiode arrays, each of said photodiode arrays containing first photodiodes designated for an odd television field and second photodiodes designated for an even television field, said first photodiodes and said second photodiodes being alternately arranged; a plurality of vertical transfer register means respectively coupled to the plurality of said photodiode arrays for receiving electric charges from said first photodiodes and said second photodiodes; storage means coupled to the plurality of said vertical transfer register means for receiving the electric charges from the plurality of said vertical transfer register means; horizontal transfer register means coupled to said storage means for transferring the electric charges delivered from said storage means in a horizontal direction to output a video signal; means for generating first high-speed pulses to sweep away electric charges contained in said vertical transfer register means and said storage means in the vertical direction during one vertical blanking period in one frame period; means for generating a first transfer pulse after generation of said first high-speed pulses to transfer electric charges accumulated in said first photodiodes to said vertical transfer register means during said vertical blanking period; means for generating second high-speed pulses after generation of said first transfer pulse to transfer the electric charges stored in said vertical transfer register means to said storage means during said vertical blanking period; means for generating a second transfer pulse after generation of said second high-speed pulses to transfer the electric charges accumulated in said second photodiodes to said vertical transfer register means; means for generating third transfer pulses after generation of said second transfer pulse to shift the electric charges stored in said storage means and in said vertical transfer register means into said horizontal transfer register means continuously during a television frame period; means for generating a fourth transfer pulse to transfer electric charges accumulated in said first photodiodes to said vertical transfer register means at a selected time point in said television frame period; and means for generating a fifth transfer pulse after said fourth transfer pulse by a predetermined period to transfer electric charges accumulated in said second photodiodes to said vertical transfer register means, whereby an effective accumulation period in said first and second photodiodes can be controlled by selecting said time point in generating said fourth transfer pulse.