CONTROL CHIP FOR USE IN VARIABLE REFRESH RATE AND RELATED DISPLAY DEVICE AND DRIVING METHOD

摘要

A control chip configured to be coupled with a backlight driving chip and a display panel is provided. The control chip includes a storage element and a processing circuit. The storage element is configured to store a predetermined vertical refresh rate of the display panel. The processing circuit is coupled with the storage element, and is configured to provide a switching signal to the backlight driving chip so that the backlight driving chip enables a backlight module according to the switching signal. A frequency of the switching signal is equal to the predetermined vertical refresh rate. If the processing circuit has not received a vertical refresh starting pulse for more than a predetermined frame time corresponding to the predetermined vertical refresh rate, the processing circuit increases the frequency of the switching signal.