Image pickup device and image pickup display system
View Patent ↗Provided is an image pickup device that includes: pixels each including a photoelectric conversion element and one or more switching elements; control lines provided to perform open/close control of at least one first switching element; a buffer circuit provided for each control line, and configured to output a voltage to each control line; second switching elements each provided between corresponding one of the control lines and a power source of the corresponding buffer circuit; and a switch control circuit that is, upon image pickup driving, configured to control one of the second switching elements, provided between a defect holding line that includes an electrically short-circuited part in the plurality of control lines and the power source of the buffer circuit of the defect holding line, to be in an open state, and configured to control another one of the second switching elements to be in a closed state.
1. An image pickup device, comprising:
a plurality of pixels each including a photoelectric conversion element and one or more switching elements, the photoelectric conversion element being configured to generate a signal charge based on a wavelength of an incident ray;
a plurality of control lines provided to perform open/close control of at least one first switching element in the one or more switching elements;
a buffer circuit provided for each of the control lines, and configured to output a voltage to each of the control lines;
second switching elements each provided between corresponding one of the control lines and a power source of the corresponding buffer circuit; and
a switch control circuit configured to perform open/close control of the second switching elements, the switch control circuit being, upon image pickup driving, configured to control one of the second switching elements, provided between a defect holding line that includes an electrically short-circuited part in the plurality of control lines and the power source of the buffer circuit of the defect holding line, to be in an open state, and configured to control another one of the second switching elements to be in a closed state.
2. The image pickup device according to claim 1 , wherein
the buffer circuit includes a CMOS circuit, and is connected to a low voltage source and a high voltage source, and
each of the second switching elements is disposed between the low voltage source, the high voltage source, or both, and corresponding one of the control lines.
3. The image pickup device according to claim 2 , wherein one of the second switching elements is disposed between the low voltage source and corresponding one of the control lines, and another one of the second switching elements is disposed between the high voltage source and corresponding one of the control lines.
4. The image pickup device according to claim 2 , wherein
the at least one first switching element is an n-channel transistor, and
one of the second switching elements is disposed at least between the low voltage source and corresponding one of the control lines.
5. The image pickup device according to claim 2 , wherein
the at least one first switching element is a p-channel transistor, and
one of the second switching elements is disposed at least between the high voltage source and corresponding one of the control lines.
6. The image pickup device according to claim 1 ,
wherein the switch control circuit includes a semiconductor memory element for each of the control lines, and
wherein the switch control circuit controls the corresponding second switching element to be in the open state or the closed state for each of the control lines by writing data into each of the semiconductor memory elements.
7. The image pickup device according to claim 6 ,
wherein the switch control circuit controls the corresponding second switching element to be in the open state by writing first data into the semiconductor memory element provided corresponding to the defect holding line, and
wherein the switch control circuit controls the corresponding second switching element to be in the closed state by writing second data into the semiconductor memory element provided corresponding to the control line other than the defect holding line.
8. The image pickup device according to claim 7 , further comprising a drive section configured to perform read-out driving of the plurality of pixels,
wherein, in a state in which all of the second switching elements are controlled to be in the closed state by writing the second data into the semiconductor memory elements, the drive section
acquires image data based on the signal charge from each of the pixels, and
detects the defect holding line, based on the image data.
9. The image pickup device according to claim 6 , wherein each of the semiconductor memory elements is a static random access memory.
10. The image pickup device according to claim 1 , further comprising a drive section configured to perform read-out driving of the plurality of pixels, wherein
the drive section, the buffer circuit, and the switch control circuit are provided on same substrate as the plurality of pixels.
11. The image pickup device according to claim 1 , further comprising a drive section configured to perform read-out driving of the plurality of pixels, wherein
the drive section, the buffer circuit, and the switch control circuit are provided on a substrate that is different from a substrate on which the plurality of pixels are provided.
12. The image pickup device according to claim 1 , wherein the defect holding line includes a part that is electrically short-circuited to a signal line through which the signal charge is output from each of the pixels.
13. The image pickup device according to claim 1 , wherein the defect holding line includes a part that is electrically short-circuited to a bias line connected to one of the photoelectric conversion elements.
14. The image pickup device according to claim 1 , wherein the image pickup device is an indirect-conversion radiation image pickup device.
15. The image pickup device according to claim 14 , wherein each of the photoelectric conversion elements is one of a PIN photodiode, a PN photodiode, and a MIS sensor.
16. The image pickup device according to claim 14 , wherein radiation acquired by the indirect-conversion radiation image pickup device comprises X-rays.
17. The image pickup device according to claim 1 , wherein the image pickup device is a direct-conversion radiation image pickup device.
18. An image pickup display system provided with an image pickup device and a display configured to perform image display based on an image pickup signal acquired by the image pickup device, the image pickup device comprising:
a plurality of pixels each including a photoelectric conversion element and one or more switching elements, the photoelectric conversion element being configured to generate a signal charge based on a wavelength of an incident ray;
a plurality of control lines provided to perform open/close control of at least one first switching element in the one or more switching elements;
a buffer circuit provided for each of the control lines, and configured to output a voltage to each of the control lines;
second switching elements each provided between corresponding one of the control lines and a power source of the corresponding buffer circuit; and
a switch control circuit configured to perform open/close control of the second switching elements, the switch control circuit being, upon image pickup driving, configured to control one of the second switching elements, provided between a defect holding line that includes an electrically short-circuited part in the plurality of control lines and the power source of the buffer circuit of the defect holding line, to be in an open state, and configured to control another one of the second switching elements to be in a closed state.