Power supply circuit, driving chip and display apparatus

Abstract

A power supply circuit, a driving chip and a display apparatus. The power supply circuit comprises: a reference current generation circuit (101), which is configured to generate a reference current; a driving circuit (302), which is connected to the reference current generation circuit (101) and is configured to generate, according to the reference current, a mirror image current with an adjustable mirror image proportion, and output a bias voltage and a gate driving voltage; and a channel current output circuit (303), which is connected to the driving circuit (302) and is configured to receive the bias voltage and the gate driving voltage, and generate, according to the mirror image current, a channel current with an adjustable mirror image proportion. Since a mirror image proportion is adjustable, the current precision can be improved, and when a relatively large output current is required, a mirror image current can remain relatively small, thereby reducing power consumption.

Dependencies are inferred from the claim text.