Huayuan Semiconductor (shenzhen) Limited Company

Hyasic Incorporation

Chenglong Zhang

Chunming Guo

Zhiwei Qiu

Shengfeng Li

Xi Tu

Junjie Zheng

An intelligent adjustment method and system for an LED backlight drive, a device and a storage medium are disclosed. The method includes: acquiring optimized channel current on each of other LED substring branches other than a non-maximum conduction branch; calculating, according to the optimized channel current, the number of cycles of conducting PWM of each LED substring branch in one frame of a frame synchronizing signal as the number of cycles of the optimized conducting PWM; and adjusting a channel current of each LED substring branch to be a corresponding optimized channel current, and adjusting the number of cycles of a conducting PWM of each LED substring branch to be the number of cycles of the optimized conducting PWM.

Intelligent adjustment method and system for LED backlight drive, device and storage medium

The invention provides a switching power supply and an electronic device, comprising an active clamp circuit and a transformer, the active clamp circuit including a first clamp capacitor, a second clamp capacitor, and a path guiding module that is connected at two terminals of the first clamp capacitor and two terminals of the second clamp capacitor respectively; the path guiding module, the first and the second clamp capacitors are all directly or indirectly connected to a primary side of the transformer; the path guiding module is configured to guide the first and the second clamp capacitors to obtain an electric energy from different positions on the primary side of the transformer in a first time period, and to guide the first and the second clamp capacitors to discharge the primary side of the transformer after being connected in parallel with each other in a second time period.

Switching power supply and electronic device

A power converter includes: a switching transistor, a transformer, a control circuit; the control circuit is configured to determine a target voltage in a process that the switching transistor is driven to conduct; the target voltage can represent a voltage change of an input terminal of the switching transistor; when the target voltage starts to drop but is higher than a reference voltage, drive a control terminal of the switching transistor with a first driving current; when the target voltage decreases to be lower than the reference voltage, drive the switching transistor with a second driving current; the second driving current is higher than the first driving current; the switching transistor is driven by the first driving current for part or all of the time before entering the Miller plateau stage, and is driven by the second driving current after starting to enter the Miller plateau stage.

Growing community of inventors

Shenzhen, China

Chenglong Zhang