Image pickup element, control method, and image pickup device
The present technology relates to an image pickup element, a control method, and an image pickup device which realize easier and more diversified data output. In one aspect of the present technology, a plurality of signal lines for transmitting a pixel signal read from a pixel is allocated to each column, and different reading modes of the pixel signals are respectively allocated to the signal lines of each column. Regarding each column of the pixel array connected to the pixel corresponding to the mode, the pixel signal is read from the pixel connected to the signal line corresponding to the reading mode of the pixel signal in the mode, and the read pixel signal is transmitted via the signal line. The present technology is applied to, for example, an image pickup element and an image pickup device.
1. An image pickup element comprising:
a pixel array;
a plurality of A/D converters configured to be allocated to each column of the pixel array and perform A/D conversion to a pixel signal read from a pixel of a column by using a different ramp signal, wherein each column includes a dummy pixel that indicates a reading mode; and
a control unit configured to perform control to set an offset of the ramp signal of each A/D converter of the plurality of A/D converters allocated to each column to be a different value, to read the pixel signal from the pixel of a line to be processed in each column of the pixel array, and to perform A/D conversion to the pixel signal read from the pixel by using the plurality of A/D converters allocated to the column.
2. The image pickup element according to claim 1 , wherein
the control unit sets the offset of the ramp signal of each A/D converter according to an inclination of the ramp signal.
3. The image pickup element according to claim 2 , wherein
the control unit sets a difference between the offsets of the ramp signals of the respective A/D converters to be small when the inclination of the ramp signal is large and sets the difference between the offsets of the ramp signals of the respective A/D converters to be large when the inclination of the ramp signal is small.
4. A control method comprising:
setting offsets of respective ramp signals of a plurality of A/D converters, wherein each column of a pixel array is allocated its own one of the plurality of A/D converters;
performing A/D conversion to pixel signals read from pixels of columns by using different ramp signals, to be values different from each other, wherein each A/D converter of the plurality of A/D converters allocated to each column has a different ramp signal and wherein each column includes a dummy pixel that indicates a reading mode;
reading a pixel signal from a pixel of a line to be processed in each column of the pixel array; and
performing A/D conversion to the pixel signals read from the pixels by the plurality of A/D converters allocated to the column.
5. An image pickup device comprising:
an imaging unit configured to image an object; and
an image processing unit configured to perform image processing to image data imaged by the imaging unit, wherein
the imaging unit includes a pixel array, and a plurality of A/D converters, wherein each column of the pixel array is allocated its own one of the plurality of A/D converters, and each A/D converter of the plurality of A/D converters performs A/D conversion to a pixel signal read from a pixel of a column by using a different ramp signal, wherein each column includes a dummy pixel that indicates a reading mode, and a control unit which performs control to set an offset of the ramp signal of each A/D converter of the plurality of A/D converters to be a different value, to read the pixel signal from the pixel of a line to be processed in each column of the pixel array, and to perform A/D conversion to the pixel signal read from the pixel.