US 11,657,757 B2
Method for driving display panel and display apparatus
Qijun Yao, Shanghai (CN); Xingyao Zhou, Shanghai (CN); and Shui He, Xiamen (CN)
Assigned to Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed by Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed on Jun. 30, 2021, as Appl. No. 17/364,485.
Claims priority of application No. 202110481310.X (CN), filed on Apr. 30, 2021.
Prior Publication US 2021/0326564 A1, Oct. 21, 2021
Int. Cl. G09G 3/3233 (2016.01); G06V 40/13 (2022.01); G06F 3/0354 (2013.01); G02F 1/1333 (2006.01)
CPC G09G 3/3233 (2013.01) [G02F 1/13338 (2013.01); G06F 3/03547 (2013.01); G06V 40/1318 (2022.01)] 19 Claims
OG exemplary drawing
 
1. A method for driving a display panel, wherein the display panel has a display region comprising a fingerprint recognition region and comprises subpixels located in the display region and an emission driving circuit, and the subpixels comprise first subpixels located in the fingerprint recognition region and are used as a light source for fingerprint recognition;
wherein the display panel has working modes comprising a first mode and a second mode, wherein the subpixels are scanned at a first frequency in the first mode, and the subpixels are scanned at a second frequency in the second mode, wherein the second frequency is greater than the first frequency; and
wherein the method comprises:
when the display panel is in the first mode, monitoring whether the display panel receives a fingerprint recognition requirement, and if it is monitored that the display panel receives the fingerprint recognition requirement, controlling the display panel to enter a trigger state; and
when the display panel is in the trigger state, scanning the first subpixels at a frequency greater than the first frequency;
wherein the display panel further comprises:
M pixel rows, wherein each of the M pixel rows comprises at least two of the subpixels arranged along a row direction, and the first subpixels are located in an xth pixel row of the M pixel rows to a yth pixel row of the M pixel rows, wherein 1≤x<y≤M, and M is a positive integer greater than 1; and
wherein the emission driving circuit is electrically connected to a first emission frame start signal line, a second emission frame start signal line, and the M pixel rows,
wherein, when the display panel is in the first mode, the method further comprises: successively outputting, by the emission driving circuit in response to a first emission frame start signal, an emission signal to the 1st pixel row to the Mth pixel row, and
wherein, when the display panel enters the trigger state, the method further comprises: successively outputting, by the emission driving circuit in response to a second emission frame start signal, the emission signal to at least the xth pixel row to the yth pixel row; and
wherein, when the display panel is in the first mode, a frequency at which the emission driving circuit outputs the emission signal is greater than the first frequency, and
wherein, when the display panel enters the trigger state, the frequency at which the emission driving circuit outputs the emission signal is equal to the frequency at which the first subpixels are scanned.