Circuit board and method and device related to the same

A method for electrical performance detection of a circuit board, wherein the circuit board comprises a plurality of rows of pixel circuits for progressive scanning and a plurality of detection terminals, one pixel circuit of the plurality of rows of the pixel circuits comprises a drive unit and a detection unit;

• the drive unit comprises a signal output terminal for outputting a drive signal;
• and the detection unit comprises an input terminal electrically connected to the signal output terminal, and an output terminal electrically connected to one of the plurality of detection terminals;
• the detection units in one row of the pixel circuits are electrically connected to different detection terminals, and the detection terminal is electrically connected to an external electrical performance detection circuit;
• and
• wherein the method comprises:
• electrically connecting an electrical performance detection circuit to one of the plurality of detection terminals;
• and
• performing a progressive scanning on the pixel circuits;
• and the detection unit electrically connects the signal output terminal to the detection terminal at a moment when the drive signal is outputted from the signal output terminal, in a process of the progressive scanning,
• wherein the drive unit comprises a first reset module, a data writing module, a light-emission control module, a storage capacitor, and a drive transistor, and a scanning for one of the pixel circuits comprises a reset stage, a data writing stage and a light-emission control stage, wherein
• in the reset stage, the first reset module connects a control terminal of the drive transistor to a first reset voltage terminal in response to a first control signal;
• the data writing module and the light-emission control module are deactivated in response to respective control signals;
• and the detection unit disconnects the signal output terminal from the detection terminal;
• in the data writing stage, the data writing module connects a first terminal of the drive transistor to a data voltage terminal and connects the control terminal of the drive transistor to a second terminal of the drive transistor, in response to the second control signal;
• the first reset module and the light-emission control module are deactivated in response to respective control signals;
• and the detection unit disconnects the signal output terminal from the detection terminal;
• and
• in the light-emission control stage, the light-emission control module connects the first terminal of the drive transistor to a first power supply voltage terminal and connects the second terminal of the drive transistor to the signal output terminal, in response to the third control signal;
• the detection unit connects the signal output terminal to the detection terminal;
• and the first reset module and the data writing module are deactivated in response to respective control signals.

A display panel, comprising:

• a circuit board, wherein the circuit board comprises a plurality of rows of pixel circuits for progressive scanning, and a plurality of detection terminals,
• one pixel circuit of the plurality of rows of pixel circuits comprises a drive unit and a detection unit,
• the drive unit comprises a signal output terminal for outputting a drive signal,
• the detection unit comprises an input terminal electrically connected to the signal output terminal, and an output terminal electrically connected to one of the plurality of detection terminals,
• the detection units in one row of the pixel circuits are electrically connected to different detection terminals,
• the detection terminal is electrically connected to an external electrical performance detection circuit, and
• wherein the detection unit is configured to electrically connect the signal output terminal to the detection terminal in a process of electrical performance detection and when the drive signal is outputted from the signal output terminal;
• and disconnect the signal output terminal from the detection terminal in a process other than the electrical performance detection;
• and
• a plurality of light-emitting elements, wherein the light-emitting elements are electrically connected to the signal output terminals,
• wherein the drive unit comprises a first reset module, a data writing module, a light-emission control module, a storage capacitor, and a drive transistor, wherein
• the first reset module is configured to connect a control terminal of the drive transistor to a first reset voltage terminal in response to a first control signal;
• the data writing module is configured to, in response to a second control signal, connect a first terminal of the drive transistor to a data voltage terminal, and connect the control terminal of the drive transistor to a second terminal of the drive transistor;
• the light-emission control module is configured to, in response to a third control signal, connect the first terminal of the drive transistor to a first power supply voltage terminal, and connect the second terminal of the drive transistor to the signal output terminal;
• and
• a first terminal of the storage capacitor is electrically connected to the first power supply voltage terminal, and a second terminal of the storage capacitor is electrically connected to the control terminal of the drive transistor, and the drive transistor is configured to output the drive signal.

A method for driving a display panel, wherein the display panel comprises a circuit board and a plurality of light-emitting elements,

• wherein the circuit board comprises a plurality of rows of pixel circuits for progressive scanning and a plurality of detection terminals, one pixel circuit of the plurality of rows of the pixel circuits comprises a drive unit and a detection unit;
• the drive unit comprises a signal output terminal for outputting a drive signal;
• and the detection unit comprises an input terminal electrically connected to the signal output terminal, and an output terminal electrically connected to one of the plurality of detection terminals;
• the detection units in one row of the pixel circuits are electrically connected to different detection terminals, and the detection terminal is electrically connected to an external electrical performance detection circuit,
• wherein the light-emitting elements are electrically connected to the signal output terminals, and
• wherein the method comprises:
• performing the progressive scanning on the plurality of rows of the pixel circuits, and the detection unit keeps disconnecting the signal output terminal from the detection terminal through during the progressive scanning,
• wherein the drive unit comprises a first reset module, a data writing module, a light-emission control module, a storage capacitor and a drive transistor, and a scanning of one pixel circuit of the plurality of rows of the pixel circuits comprises a reset stage, a data writing stage and a light-emission control stage, wherein
• in the reset stage, the first reset module connects a control terminal of the drive transistor to a first reset voltage terminal in response to a first control signal;
• the data writing module and the light-emission control module are deactivated in response to respective control signals;
• and the detection unit disconnects the signal output terminal from the detection terminal;
• in the data writing stage, the data writing module connects a first terminal of the drive transistor to a data voltage terminal and connects the control terminal of the drive transistor to a second terminal of the drive transistor, in response to the second control signal;
• the first reset module and the light-emission control module are deactivated in response to respective control signals;
• and the detection unit disconnects the signal output terminal from the detection terminal;
• and
• in the light-emission control stage, the light-emission control module connects the first terminal of the drive transistor to a first power supply voltage terminal and connects the second terminal of the drive transistor to the signal output terminal, in response to the third control signal;
• the first reset module and the data writing module are deactivated in response to respective control signals;
• and the detection unit disconnects the signal output terminal from the detection terminal.