Pixel drive circuit and display panel

A pixel drive circuit, comprising:

• a micro light-emitting diode, a cathode of the micro light-emitting diode being grounded;
• a light-emitting control circuit, connected with a anode of the micro light-emitting diode, and configured to control an emission time of the micro light-emitting diode;
• and
• a current control circuit, connected with the light-emitting control circuit, and configured to output a preset current to the light-emitting control circuit to control the micro light-emitting diode to work under a set current density, wherein luminous efficiency of the micro light-emitting diode under the set current density is greater than a set threshold,
• wherein the current control circuit comprises:
• a first control sub-circuit, a first terminal of the first control sub-circuit being connected with a first power supply terminal, and a second terminal of the first control sub-circuit being connected with the light-emitting control circuit;
• a first storage sub-circuit, connected with a third terminal of the first control sub-circuit, and configured to discharge through the first control sub-circuit and control the first control sub-circuit to work at the preset current;
• and
• a first charging sub-circuit, connected with the first storage sub-circuit, and configured to charge the first storage sub-circuit.