Display Substrate, Preparation Method Thereof, and Display Device

A preparation method for a display substrate, the display substrate comprising a plurality of sub-pixels;

• the preparation method comprises:
• a driving circuit layer is formed in at least one sub-pixel, and the driving circuit layer comprises a pixel driving circuit;
• a light emitting structure layer is formed on the driving circuit layer, and the light emitting structure layer comprises a light emitting device connected to the pixel driving circuit;
• the pixel driving circuit comprises a reset sub-circuit, a writing sub-circuit, a driving sub-circuit, a compensation sub-circuit, an energy storage sub-circuit and a light emitting control sub-circuit;
• the reset sub-circuit is respectively connected to a second scan signal line, an initial signal line, a first node and a fourth node, and is configured to provide an initial voltage output by the initial signal line to the first node and the fourth node under the control of the second scan signal line;
• the writing sub-circuit is respectively connected to a first scan signal line, a data signal line and the second node, and is configured to provide a data voltage output by the data signal line to the second node under the control of the first scan signal line;
• the driving sub-circuit is respectively connected with the first node, the second node, and a third node, and is configured to provide a voltage of the second node to the third node under the control of the first node;
• the compensation sub-circuit is respectively connected with the first scan signal line, the first node and the third node, and is configured to provide a voltage of the third node to the first node under the control of the first scan signal line to compensate the first node until a voltage of the first node meets a threshold condition;
• the energy storage sub-circuit is respectively connected with a first power supply line and the first node, and is configured to store a voltage difference between a first power supply voltage output by the first power supply line and the first node;
• the light emitting control sub-circuit is respectively connected with a light emitting control line, the first power supply line, the second node, the third node and the fourth node, and is configured to provide a first power supply voltage output by the first power supply line to the second node and a voltage of the third node to the fourth node under the control of the light emitting control line;
• and
• at least one of the reset sub-circuit, the compensation sub-circuit, and the writing sub-circuit comprises an oxide transistor and a one-way conductive device.