US 11,893,929 B2
Display screen rate conversion method and terminal
Le Yang, Guangdong (CN); and Zhijia Cui, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Jul. 14, 2022, as Appl. No. 17/812,599.
Application 17/812,599 is a continuation of application No. PCT/CN2021/071286, filed on Jan. 12, 2021.
Claims priority of application No. 202010039092.X (CN), filed on Jan. 14, 2020; application No. 202010039097.2 (CN), filed on Jan. 14, 2020; and application No. 202011061844.9 (CN), filed on Sep. 30, 2020.
Prior Publication US 2022/0351679 A1, Nov. 3, 2022
Int. Cl. G09G 3/3225 (2016.01)
CPC G09G 3/3225 (2013.01) [G09G 2340/0435 (2013.01)] 17 Claims
OG exemplary drawing
 
1. 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 not 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, adjusting the first refresh rate to a second refresh rate; wherein the second refresh rate is less than the first refresh rate; and
adjusting the display screen parameters according to the second refresh rate.