US Patent No. 10,398,002

BACKLIGHT MODULE, LCD AND BACKLIGHT MODULE DRIVING CONTROL METHOD


Patent No. 10,398,002
Issue Date August 27, 2019
Title Backlight Module, Lcd And Backlight Module Driving Control Method
Inventorship Pengbo Xu, Guangdong (CN)
Assignee Wuhan China Star Optoelectronics Technology Co., Ltd, Wuhan, Hubei (CN)

Claim of US Patent No. 10,398,002

1. A backlight module, comprising: a pulse width modulation (PWM) control circuit, a driving circuit, a first white light-emitting diode (LED) set and a second white LED set; the PWM control circuit being connected to the driving circuit, and the driving circuit being connected to the first white LED set and the second white LED set respectively; the PWM control circuit controlling the driving circuit to drive the first white LED set and the second white LED set to emit first light and second light, respectively; wherein the first light of the first white LED set and the second light of the second white LED set have different chroma;wherein a detection unit detects chroma information of mixed light of the first light of the first white LED set and the second light of the second white LED set and transmits the detected chroma information of the mixed light to the PWM control circuit such that based on the detected chroma information, the PWM control circuit controls the driving circuit to drive the first white LED set and the second white LED set to provide the mixed light with a chroma value that is within a preset threshold range.