Image pickup including photoelectric conversion
View Patent ↗An image pickup unit includes: an image pickup section including a plurality of pixels, each of the pixels including a photoelectric conversion device; and a driving section that includes an amplifier and drives each of the pixels to perform a read out operation intended to read out electric charge obtained by the photoelectric conversion device from the pixel as a signal with use of the amplifier, a pixel reset operation intended to reset electric charge in the pixel, and an amplifier reset operation intended to reset an operation of the amplifier. The driving section drives each of the pixels to allow one or both of end timing of the pixel reset operation and end timing of the amplifier reset operation not to be included in a predetermined power-source potential unstable period.
1. An image pickup unit comprising:
an image pickup section including a plurality of pixels, each of the pixels including a photoelectric conversion device; and
a driving section that includes an amplifier and drives each of the pixels to perform a read out operation intended to read out electric charge obtained by the photoelectric conversion device from the pixel as a signal with use of the amplifier, a pixel reset operation intended to reset electric charge in the pixel, and an amplifier reset operation intended to reset an operation of the amplifier, wherein:
the driving section drives each of the pixels to allow one or both of end timing of the pixel reset operation and end timing of the amplifier reset operation not to be included in a predetermined power-source potential unstable period;
a period of the amplifier reset operation overlap with each other at least in part; and
the entire period of the pixel reset operation is included in the period of the amplifier reset operation.
2. The image pickup unit according to claim 1 , wherein the driving section drives each of the pixels to allow the end timing of the pixel reset operation not to be included in the power-source potential unstable period.
3. The image pickup unit according to claim 2 , wherein the driving section drives each of the pixels to allow both the end timing of the pixel reset operation and the end timing of the amplifier reset operation not to be included in the power-source potential unstable period.
4. The image pickup unit according to claim 1 , wherein the driving section drives each of the pixels to allow the end timing of the amplifier reset operation not to be included in the power-source potential unstable period.
5. The image pickup unit according to claim 1 , wherein the period of the pixel reset operation and the period of the amplifier reset operation coincide with each other.
6. The image pickup unit according to claim 1 , wherein the driving section drives each of the pixels to allow the entire period of the pixel reset operation or the entire period of the amplifier reset operation not to be included in the power-source potential unstable period.
7. The image pickup unit according to claim 1 , wherein the driving section drives each of the pixels to allow the pixel reset operation to be intermittently performed multiple times in a predetermined unit period.
8. The image pickup unit according to claim 7 , wherein the pixel reset operation is intermittently performed multiple times over a period longer than one horizontal period.
9. The image pickup unit according to claim 1 , wherein
the image pickup section generates an electric signal corresponding to incident radiation, and
the image pickup unit serves as a radiation image pickup unit.
10. The image pickup unit according to claim 9 , wherein the image pickup section includes:
a photoelectric conversion layer configuring the photoelectric conversion device; and
a wavelength conversion layer converting a wavelength of the radiation into a wavelength falling within a sensing range of the photoelectric conversion layer.
11. The image pickup unit according to claim 9 , wherein the image pickup section includes a photoelectric conversion layer configured to directly generate the electric signal corresponding to the radiation, the photoelectric conversion layer configuring the photoelectric conversion device.
12. The image pickup unit according to claim 9 , wherein the radiation is X-ray.
13. An image pickup unit comprising:
an image pickup section including a plurality of pixels, each of the pixels including a photoelectric conversion device; and
a driving section that includes an amplifier and drives each of the pixels to perform a read out operation intended to read out electric charge obtained by the photoelectric conversion device from the pixel as a signal with use of the amplifier, a pixel reset operation intended to reset electric charge in the pixel, and an amplifier reset operation intended to reset an operation of the amplifier, wherein the driving section drives each of the pixels to allow one or both of end timing of the pixel reset operation and end timing of the amplifier reset operation not to be included in a predetermined power-source potential unstable period, and wherein the driving section includes:
a multiplexer circuit selecting a part of the signal read out with use of the amplifier; and
an A/D converter performing A/D conversion on the signal selected by the multiplexer circuit, and
the power-source potential unstable period includes one or both of an operation period of the multiplexer circuit and an operation period of the A/D converter.