Patent ID: 11893929
Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A display screen rate conversion method, applied to a display driver integrated circuit (DDIC) chip of an organic light-emitting diode (OLED) display screen, comprising:
initializing display screen parameters according to a first refresh rate;
in response to receiving first image data sent by an application processor (AP), performing an image scanning according to the first refresh rate, comprising:
generating a vertical synchronous signal (Vsync) according to the VFP corresponding to the first refresh rate;
matching a timing of a first light-emitting (EM) start vertical (ESTV) with a timing of a vertical back porch (VBP), and performing an EM scanning according to an EM frequency; wherein a position of the VBP is determined according to a position of the Vsync; and
matching a timing of a first gate start vertical (GSTV) and the timing of the first ESTV, and performing a gate scanning according to the first refresh rate;

in response to receiving second image data sent by the AP within a preset delay duration of a vertical front porch (VFP) corresponding to the first refresh rate, obtaining a time interval between a current moment and a falling edge of a n-th light-emitting (EM) start vertical (ESTV); wherein the n-th ESTV is a next ESTV of the current moment, wherein the n is an integer greater than zero; and
adjusting the VFP according to the time interval, wherein a timing of a gate start vertical (GSTV) and a timing of an ESTV match after the VFP is adjusted.