Patent ID: 9236031
Filing Date: 2016-01-12
CPC Classification: G09G

Claim Text:
1. A method for synchronizing a display horizontal synchronization signal to an external horizontal synchronization signal, comprising: receiving the external horizontal synchronization signal, wherein an original pulse width of the external horizontal synchronization signal is different from an original pulse width of the display horizontal synchronization signal, and an original time length of a vertical blanking interval of the external horizontal synchronization signal is different from an original time length of a vertical blanking interval of the display horizontal synchronization signal; calculating a difference between the external horizontal synchronization signal and the display horizontal synchronization signal, wherein the difference is a time difference between a rising edge of the external horizontal synchronization signal and a falling edge of the display horizontal synchronization signal in a same frame; and adjusting the vertical blanking interval of the display horizontal synchronization signal according to the difference between the external horizontal synchronization signal and the display horizontal synchronization signal, for synchronizing the display horizontal synchronization signal to the external horizontal synchronization signal.