Solid-state image sensing device and method of driving the same
AssigneeNEC Corporation
InventorsIchiro Murakami, Yasutaka Nakashiba
Life of this patent
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Abstract
A solid-state image sensing device having: a plurality of sensing means arrayed in the form of a matrix; a charge accumulation means that is connected to the sensing means and accumulates a charge generated at the sensing means; an accumulable charge adjusting means that adjusts the amount of accumulable charge of the charge accumulation means; and a control means that controls the accumulable charge adjusting means. The control means controls the amount of accumulable charge to vary continuously or discontinuously in time series within one imaging period and within a given amount of accumulable charge of the control means.
Claims15
A solid-state image sensing device, comprising:
- a plurality of sensing means arrayed in the form of a matrix;
- a charge accumulation means that is connected to said sensing means and accumulates a charge generated at said sensing means;
- an accumulable charge adjusting means that adjusts the amount of accumulable charge of said charge accumulation means;
- and
- a control means that controls said accumulable charge adjusting means;
- wherein said control means controls said accumulable charge adjusting means to switch said amount of accumulable charge in the order of Qsat(1) and Qsat(2) within one imaging period, while controlling the accumulation modes of Qsat(1) and Qsat(2) to satisfy:
- Qsat(1)/t(1)<(Qsat(2)−Qsat(1))/(t(2)−t(1)),
- where Qsat(1) is a first amount of accumulable charge, Qsat(2) is a second amount of accumulable charge, a finish time of accumulation mode of Qsat(1) is t(1) and a finish time of accumulation mode of Qsat(2) corresponding to the end of one imaging period is t(2).
A method of driving a solid-state image sensing device which comprises a plurality of sensing means arrayed in the form of a matrix, a charge accumulation means that is connected to said sensing means and accumulates a charge generated at said sensing means, an accumulable charge adjusting means that adjusts the amount of accumulable charge of said charge accumulation means, and a control means that controls said accumulable charge adjusting means, said method comprising:
- controlling the accumulable charge adjusting means to switch the amount of accumulable charge in the order of Qsat(1) and Qsat(2) within one imaging period, while controlling the accumulation modes of Qsat(1) and Qsat(2) to satisfy:
- Qsat(1)/t(1)<(Qsat(1)−Qsat(2))/(t(2)−t(1)),
- where Qsat(1) is a first amount of accumulable charge, Qsat(2) is a second amount of accumulable charge, a finish time of accumulation mode of Qsat(1) is t(1) and a finish time of accumulation mode of Qsat(2) corresponding to the end of one imaging period is t(2).
A method of driving a solid-state image sensing device which comprises a plurality of sensing means arrayed in the form of a matrix, a charge accumulation means that is connected to said sensing means and accumulates a charge generated at said sensing means, an accumulable charge adjusting means that adjusts the amount of accumulable charge of said charge accumulation means, and a control means that controls said accumulable charge adjusting means, said method comprising:
- controlling the accumulable charge adjusting means to switch said amount of the accumulable charge in the order of Qsat(1), Qsat(2), . . . Qsat(n) within one imaging period, while switching sequentially from a first amount of accumulable charge (Qsat(1)≠0) to nth amount of accumulable charge Qsat(n), n being a positive integer, where Qsat(1)<Qsat(2)< . . . <Qsat(n) is satisfied.
A recording medium that stores a program to make a computer conduct a method of driving a solid-state image sensing device which comprises a plurality of sensing means arrayed in the form of a matrix, a charge accumulation means that is connected to said sensing means and accumulates a charge generated at said sensing means, an accumulable charge adjusting means that adjusts the amount of accumulable charge of said charge accumulation means, and a control means that controls said accumulable charge adjusting means, said method of driving comprising the step of:
- controlling the accumulable charge adjusting means to switch the amount of accumulable charge in the order of Qsat(1) and Qsat(2) within one imaging period, while controlling the accumulation modes of Qsat(1) and Qsat(2) to satisfy:
- Qsat(1)/t(1)<(Qsat(1)−Qsat(2))/(t(2)−t(1)),
- where Qsat(1) is a first amount of accumulable charge, Qsat(2) is a second amount of accumulable charge, a finish time of accumulation mode of Qsat(1) is t(1) and a finish time of accumulation mode of Qsat(2) corresponding to the end of one imaging period is t(2).
A solid-state image sensing device comprising:
- a plurality of sensing means arrayed in the form of a matrix;
- a charge accumulation means that is connected to said sensing means and accumulates a charge generated at said sensing means;
- an accumulable charge adjusting means that adjusts the amount of accumulable charge of said charge accumulation means;
- and
- a control means that controls said accumulable charge adjusting means;
- wherein said control means controls said accumulable charge adjusting means to switch said amount of accumulable charge in the order of Qsat(1), Qsat(2), . . . Qsat(n) within one imaging period, while switching sequentially from a first amount of accumulable charge (Qsat(1)≠0) to nth amount of accumulable charge Qsat(n), n being a positive integer, where Qsat(1)<Qsat(2)<. . . <Qsat(n) is satisfied.
Dependencies are inferred from the claim text.