Image sensor, operating method therefor, and electronic device
View Patent ↗An image sensor includes: a plurality of light-receiving elements that receive light from a subject and are arranged in a 2-dimensional form; a detection unit that detects a movement amount of a projected image of the subject projected to the plurality of light-receiving elements arranged in the 2-dimensional form; and a light-receiving element control unit that adaptively controls a timing at which pixel data is read from the plurality of light-receiving elements arranged in the 2-dimensional form for each line according to the movement amount.
1. An image sensor comprising:
a plurality of light-receiving elements that receive light from a subject and are arranged in a 2-dimensional form;
a detection unit that detects a movement amount of a projected image of the subject projected to the plurality of light-receiving elements arranged in the 2-dimensional form; and
a light-receiving element control unit that adaptively controls a timing at which pixel data is read from the plurality of light-receiving elements arranged in the 2-dimensional form for each line according to the movement amount,
wherein the light-receiving element control unit calculates a coefficient proportional to a reciprocal of a ratio of an exposure time, in which the light-receiving elements are reset and the pixel data is then read, to a proper exposure time, and
wherein the image sensor further comprises:
a multiplication unit that adjusts a gain by multiplying pixel data generated when some of the plurality of light-receiving elements arranged in the 2-dimensional form receive light by the coefficient.
2. The image sensor according to claim 1 , wherein the detection unit detects the movement amount using images captured previously and currently by the light-receiving elements or detects the movement amount using a gyro sensor.
3. The image sensor according to claim 1 , wherein the light-receiving element control unit adaptively controls reading for each line at a timing obtained by proration of chronological displacement of a line in which the pixel data is previously read from the plurality of light-receiving elements and chronological displacement of a line in which pixel data is currently read from the plurality of light-receiving elements.
4. A method of operating an image sensor including a plurality of light-receiving elements that receive light from a subject and are arranged in a 2-dimensional form, the method comprising:
detecting a movement amount of a projected image of the subject projected to the plurality of light-receiving elements arranged in the 2-dimensional form;
adaptively controlling a line in which pixel data is read from the plurality of light-receiving elements arranged in the 2-dimensional form according to the movement amount;
calculating a coefficient proportional to a reciprocal of a ratio of an exposure time, in which the light-receiving elements are reset and the pixel data is then read, to a proper exposure time; and
adjusting a gain by multiplying pixel data generated when some of the plurality of light-receiving elements arranged in the 2-dimensional form receive light by the coefficient.
5. A program stored on a non-transitory computer readable medium causing a computer controlling an image sensor including a plurality of light-receiving elements that receive light from a subject and are arranged in a 2-dimensional form to perform a process comprising:
detecting a movement amount of a projected image of the subject projected to the plurality of light-receiving elements arranged in the 2-dimensional form; and
adaptively controlling a line in which pixel data is read from the plurality of light-receiving elements arranged in the 2-dimensional form according to the movement amount;
calculating a coefficient proportional to a reciprocal of a ratio of an exposure time, in which the light-receiving elements are reset and the pixel data is then read, to a proper exposure time; and
adjusting a gain by multiplying pixel data generated when some of the plurality of light-receiving elements arranged in the 2-dimensional form receive light by the coefficient.
6. An electronic device comprising:
a plurality of light-receiving elements that receive light from a subject and are arranged in a 2-dimensional form;
a detection unit that detects a movement amount of a projected image of the subject projected to the plurality of light-receiving elements arranged in the 2-dimensional form; and
a light-receiving element control unit that adaptively controls a timing at which pixel data is read from the plurality of light-receiving elements arranged in the 2-dimensional form for each line according to the movement amount,
wherein the light-receiving element control unit calculates a coefficient proportional to a reciprocal of a ratio of an exposure time, in which the light-receiving elements are reset and the pixel data is then read, to a proper exposure time, and
wherein the image sensor further comprises:
a multiplication unit that adjusts a gain by multiplying pixel data generated when some of the plurality of light-receiving elements arranged in the 2-dimensional form receive light by the coefficient.
7. The electronic device according to claim 6 , wherein the detection unit detects the movement amount using images captured previously and currently by the light-receiving elements or detects the movement amount using a gyro sensor.
8. The electronic device according to claim 6 , wherein the light-receiving element control unit adaptively controls reading for each line at a timing obtained by proration of chronological displacement of a line in which the pixel data is previously read from the plurality of light-receiving elements and chronological displacement of a line in which pixel data is currently read from the plurality of light-receiving elements.
9. The method according to claim 4 , wherein detecting the movement amount includes using images captured previously and currently by the light-receiving elements or detecting the movement amount using a gyro sensor.
10. The method according to claim 4 , wherein adaptively controlling a line in which pixel data is read includes adaptively controlling reading for each line at a timing obtained by proration of chronological displacement of a line in which the pixel data is previously read from the plurality of light-receiving elements and chronological displacement of a line in which pixel data is currently read from the plurality of light-receiving elements.
11. The program according to claim 5 , wherein detecting the movement amount includes using images captured previously and currently by the light-receiving elements or detecting the movement amount using a gyro sensor.
12. The program according to claim 5 , wherein adaptively controlling a line in which pixel data is read includes adaptively controlling reading for each line at a timing obtained by proration of chronological displacement of a line in which the pixel data is previously read from the plurality of light-receiving elements and chronological displacement of a line in which pixel data is currently read from the plurality of light-receiving elements.