Photoelectric sensor and method for driving the same, and display apparatus

A method for driving a photoelectric sensor, wherein the photoelectric sensor comprises a photosensitive circuit, wherein the photosensitive circuit comprises a photoelectric diode, a reset transistor, a voltage conversion transistor, a read control transistor, a read transistor, a first node, and a second node, wherein the read transistor is a p-type transistor;

• the reset transistor, a first electrode of the photoelectric diode, and a control electrode of the voltage conversion transistor are all electrically connected to the first node;
• and the voltage conversion transistor, the read control transistor, and a control electrode of the read transistor are all electrically connected to the second node;
• wherein the reset transistor is configured to be turned on under control of a control electrode of the reset transistor to reset the first node;
• wherein the voltage conversion transistor and the read control transistor are configured to turn on under control of the control electrode of the voltage conversion transistor and a control electrode of the read control transistor, respectively, to control a voltage of the second node;
• wherein the read transistor is configured to output a detection signal under control of the control electrode of the read transistor;
• wherein the voltage conversion transistor further comprises a first electrode configured to directly receive a first voltage signal, and a second electrode electrically connected to the second node;
• wherein the control electrode of the read control transistor is configured to receive a read control signal;
• wherein the read control transistor further comprises a first electrode configured to directly receive a second voltage signal, and a second electrode electrically connected to the second node;
• wherein the read transistor further comprises a first electrode configured to directly receive the second voltage signal;
• wherein the photoelectric diode further comprises a second electrode configured to receive a common voltage signal;
• wherein the first voltage signal has a voltage value greater than a voltage value of the second voltage signal and a voltage value of the common voltage signal;
• and wherein the method comprises:
• controlling the photosensitive circuit to operate in a read stage of a working cycle,
• wherein, in the read stage, a voltage of the first node is provided to the control electrode of the voltage conversion transistor in such a manner that the voltage conversion transistor is controlled to be turned on, and simultaneously another voltage is provided to a control electrode of the read control transistor in such a manner that the read control transistor is controlled to be turned on, and the voltage conversion transistor and the read control transistor jointly control a voltage of the second node;
• and
• wherein in the read stage, the read transistor outputs a detection signal under control of the second node.

A display apparatus, comprising:

• a photoelectric sensor, wherein the photoelectric sensor comprises a photosensitive circuit, wherein the photosensitive circuit comprises a photoelectric diode, a reset transistor, a voltage conversion transistor, a read control transistor, a read transistor, a first node, and a second node, and
• wherein the read transistor is a p-type transistor;
• wherein the reset transistor, a first electrode of the photoelectric diode, and a control electrode of the voltage conversion transistor are all electrically connected to the first node;
• wherein the voltage conversion transistor, the read control transistor, and a control electrode of the read transistor are all electrically connected to the second node;
• wherein the reset transistor is configured to be turned on under control of a control electrode of the reset transistor to reset the first node;
• wherein the voltage conversion transistor and the read control transistor are configured to turn on under control of the control electrode of the voltage conversion transistor and a control electrode of the read control transistor, respectively, to control a voltage of the second node;
• wherein the read transistor is configured to output a detection signal under control of the control electrode of the read transistor;
• wherein the voltage conversion transistor further comprises a first electrode configured to directly receive a first voltage signal, and a second electrode electrically connected to the second node;
• wherein the control electrode of the read control transistor is configured to receive a read control signal;
• wherein the read control transistor further comprises a first electrode configured to directly receive a second voltage signal, and a second electrode electrically connected to the second node;
• wherein the read transistor further comprises a first electrode configured to directly receive the second voltage signal;
• and
• wherein the photoelectric diode further comprises a second electrode configured to receive a common voltage signal;
• wherein the first voltage signal has a voltage value greater than a voltage value of the second voltage signal and a voltage value of the common voltage signal.