Chipone Technology (beijing) Co., Ltd.

Yingjie Ma

Disclosed in an embodiment of the present application is an LED driver circuit and an LED display apparatus. The LED driver circuit comprises: a first component area, which comprises a first driving channel group and a second driving channel group that are arranged symmetrically and comprise a same number of driving channels, respectively; and a second component area, which is provided with an analog ground pad connected to a substrate of the driving channels through a metal wire. According to the present application, chip internal noise can be effectively reduced, and accuracy of matching output currents of the driving channels can be improved to obtain good current consistency, thereby being beneficial to guarantee display effect of a LED display screen.

LED driver circuit and LED display apparatus

A power supply circuit, a driving chip and a display apparatus. The power supply circuit comprises: a reference current generation circuit (), which is configured to generate a reference current; a driving circuit (), which is connected to the reference current generation circuit () 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 (), which is connected to the driving circuit () 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.

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Beijing, China

Yingjie Ma