TECHNICAL FIELD

Embodiments of the present disclosure relate to a display substrate and a manufacturing method thereof, and a display panel.

BACKGROUND

Organic light-emitting diode (OLED) display devices have advantages of the self-luminous function, high contrast, high definition, wide viewing angle, low power consumption, fast response speed, low manufacturing cost, etc., and have become one of focus developing directions of new generation display devices, thereby getting more and more attention. The pixel driving circuit of the OLED display device usually includes circuit components such as transistors and capacitors, and the current flowing through the light-emitting diode is controlled by these circuit components, thereby controlling the display gray level of the display device.

SUMMARY

At least an embodiment of the present disclosure provides a display substrate, and the display substrate includes a base substrate and a pixel driving circuit. The pixel driving circuit is on the base substrate and includes a driving transistor and a gate leading line, the driving transistor includes a gate electrode, and the gate leading line is electrically connected to the gate electrode; and the gate leading line is between the gate electrode and the base substrate.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a data line, the data line is on a side, away from the base substrate, of the gate electrode, the driving transistor is configured to receive a data voltage signal provided by the data line at the gate electrode and control a driving current flowing through the driving transistor based on the data voltage signal, and the driving current is provided to drive a light-emitting component to work.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a shielding layer, the shielding layer is between a layer, where the gate electrode is located, and a layer, where the data line is located, and the shielding layer and the gate electrode are insulated from each other and are overlapped with each other in a direction perpendicular to the base substrate.

For example, in the display substrate provided by at least an embodiment of the present disclosure, the shielding layer is a metal layer.

For example, in the display substrate provided by at least an embodiment of the present disclosure, an orthographic projection of the gate leading line on the base substrate at least partially overlaps with an orthographic projection of the shielding layer on the base substrate.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a buffer layer, the buffer layer is on the base substrate and includes a first via hole, the gate leading line is on a side, close to the base substrate, of the buffer layer, the gate electrode is on a side, away from the base substrate, of the buffer layer, and the gate leading line is connected to the gate electrode through the first via hole.

For example, in the display substrate provided by at least an embodiment of the present disclosure, the buffer layer further includes a second via hole, and the gate leading line is electrically connected to a circuit component different from the driving transistor through the second via hole.

For example, in the display substrate provided by at least an embodiment of the present disclosure, the circuit component includes a reset transistor, a compensation transistor, or a storage capacitor.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a second buffer layer, the second buffer layer is on the base substrate, and the gate leading line is on a side, away from the base substrate, of the second buffer layer.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a conductive layer, and the conductive layer is on a side, away from the base substrate, of the gate leading line, and covers at least a part of a side surface of the gate leading line and a surface, away from the base substrate, of the gate leading line.

For example, the display substrate provided by at least an embodiment of the present disclosure further includes a light-shielding layer, the gate leading line and the light-shielding layer are in an identical layer, and the light-shielding layer at least partially overlaps with the pixel driving circuit.

For example, in the display substrate provided by at least an embodiment of the present disclosure, the driving transistor further including a semiconductor layer, and the gate leading line and the semiconductor layer are in an identical layer.

For example, in the display substrate provided by at least an embodiment of the present disclosure, the semiconductor layer includes a non-conducted channel region, a conductive source region, and a conductive drain region, and the gate leading line includes a conductive semiconductor material.

At least an embodiment of the present disclosure further provides a method for manufacturing a display substrate, including: providing a base substrate, and forming a pixel driving circuit on the base substrate. The pixel driving circuit includes a driving transistor and a gate leading line, the driving transistor includes a gate electrode, the gate leading line is electrically connected to the gate electrode, and the gate leading line is formed between the gate electrode and the base substrate.

For example, the manufacturing method provided by at least an embodiment of the present disclosure further includes: forming a data line on a side, away from the base substrate, of the gate electrode. The driving transistor is formed to receive a data voltage signal provided by the data line at the gate electrode and control a driving current flowing through the driving transistor based on the data voltage signal, and the driving current is provided to drive a light-emitting component to work.

For example, the manufacturing method provided by at least an embodiment of the present disclosure further includes: forming a shielding layer between a layer, where the gate electrode is located, and a layer, where the data line is located. The shielding layer and the gate electrode are insulated from each other and are overlapped with each other in a direction perpendicular to the base substrate.

For example, in the manufacturing method provided by at least an embodiment of the present disclosure, the gate leading line and the light-shielding layer are formed in an identical layer, and the light-shielding layer at least partially overlaps with the pixel driving circuit.

For example, in the manufacturing method provided by at least an embodiment of the present disclosure, forming the driving transistor further includes: forming a semiconductor layer, and the gate leading line and the semiconductor layer are formed in an identical layer.

For example, in the manufacturing method provided by at least an embodiment of the present disclosure, forming the gate leading line and the semiconductor layer includes: forming a semiconductor material layer, where the semiconductor material layer includes a channel region, a source region, a drain region, and a gate leading line region; and performing a doping process on the source region, the drain region, and the gate leading line region, so as to allow the source region, the drain region, and the gate leading line region to be electrically conductive.

At least an embodiment of the present disclosure further provides a display panel, and the display panel includes the display substrate provided by any one of the embodiments of the present disclosure.

