Solid-state image pickup device, driving method of solid-state image pickup device, and electronic device
First Claim
Patent Images
1. A solid-state image pickup device comprising:
- a plurality of unit pixels each including at least a photoelectric converting section, a charge-to-voltage converting section, a charge discharging section, and one or more transfer means for transferring a charge in either a first predetermined path to the charge-to-voltage converting section or a second predetermined path to the charge discharging section;
a light shielding film for shielding a surface of said plurality of unit pixels excluding at least a light receiving section of said photoelectric converting sections from light; and
voltage controlling means for controlling a voltage applied to said light shielding film;
wherein,transfer of the charge by one of said transfer means is controlled by (i) applying a control pulse to said light shielding film, and (ii) controlling a potential barrier having a variable height based on the control pulse applied to said light shielding film, andthe voltage controlling means causes the charge to be transferred to the charge discharging section along the second predetermined path if a photodiode saturates during a readout period after an end of light exposure.
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Abstract
A solid-state image pickup device includes: a plurality of unit pixels including at least a photoelectric converting section, a charge-to-voltage converting section, and one or more transfer means for transferring a charge in a predetermined path; a light shielding film for shielding a surface of the plurality of unit pixels excluding at least a light receiving section of the photoelectric converting section from light; and voltage controlling means for controlling a voltage applied to the light shielding film; wherein transfer of the charge by one of the transfer means is controlled by controlling the voltage applied to the light shielding film.
27 Citations
10 Claims
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1. A solid-state image pickup device comprising:
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a plurality of unit pixels each including at least a photoelectric converting section, a charge-to-voltage converting section, a charge discharging section, and one or more transfer means for transferring a charge in either a first predetermined path to the charge-to-voltage converting section or a second predetermined path to the charge discharging section; a light shielding film for shielding a surface of said plurality of unit pixels excluding at least a light receiving section of said photoelectric converting sections from light; and voltage controlling means for controlling a voltage applied to said light shielding film; wherein, transfer of the charge by one of said transfer means is controlled by (i) applying a control pulse to said light shielding film, and (ii) controlling a potential barrier having a variable height based on the control pulse applied to said light shielding film, and the voltage controlling means causes the charge to be transferred to the charge discharging section along the second predetermined path if a photodiode saturates during a readout period after an end of light exposure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for driving a solid-state image pickup device, the solid-state image pickup device including (a) a plurality of unit pixels each including at least a photoelectric converting section, a charge-to-voltage converting section, a charge discharging section, and one or more transfer means for transferring charge in either a first predetermined path to the charge-to-voltage converting section or a second predetermined path to the charge discharging section, (b) a light shielding film for shielding a surface of said plurality of unit pixels excluding at least a light receiving section of said photoelectric converting section from light, and (c) voltage controlling means for controlling a voltage applied to said light shielding film, the method comprising:
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controlling transfer of charge by one of said transfer means by (i) applying a control pulse to said light shielding film, and (ii) controlling a potential barrier having a variable height based on the control pulse applied to said light shielding film, wherein the voltage controlling means causes the charge to be transferred to the charge discharging section along the second predetermined path if a photodiode saturates during a readout period after an end of light exposure. - View Dependent Claims (8, 9)
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10. An electronic device comprising a solid-state image pickup device, the solid-state image pickup device including:
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a plurality of unit pixels each including at least a photoelectric converting section, a charge-to-voltage converting section, a charge discharging section, and one or more transfer means for transferring a charge in either a first predetermined path to the charge-to-voltage converting section or a second predetermined path to the charge discharging section; a light shielding film for shielding a surface of said plurality of unit pixels excluding at least a light receiving section of said photoelectric converting section from light; and voltage controlling means for controlling a voltage applied to said light shielding film, wherein, the solid-state image pickup device controls transfer of the charge by one of said transfer means by (i) applying a control pulse to said light shielding film, and (ii) controlling a potential barrier having a variable height based on the control pulse applied to said light shielding film, and the voltage controlling means causes the charge to be transferred to the charge discharging section along the second predetermined path if a photodiode saturates during a readout period after an end of light exposure.
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Specification