US 12,170,055 B2
Compensation method for display panel and display panel
Yuchao Zeng, Guangdong (CN)
Assigned to Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
Filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong (CN)
Filed on Nov. 3, 2023, as Appl. No. 18/501,106.
Claims priority of application No. 202310118605.X (CN), filed on Jan. 31, 2023.
Prior Publication US 2024/0257721 A1, Aug. 1, 2024
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0426 (2013.01); G09G 2320/0233 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A compensation method for a display panel, comprising:
selecting a rectangular test area in a display area of a display panel, wherein the rectangular test area is provided with one or more pixel circuits, each of the pixel circuits comprises a driving transistor and a sensing transistor, and a first electrode of the sensing transistor is connected to a source electrode of the driving transistor;
obtaining a first average current value flowing through all the sensing transistors and a second average current value flowing through all the driving transistors in the rectangular test area;
obtaining a first current curve and a second current curve flowing through the driving transistors based on the first average current value and the second average current value under different driving voltages, wherein the driving voltage is a gate-to-source voltage difference of the driving transistor, the first current curve is a current curve corresponding to the gate-source voltage difference of the driving transistor before the light-emitting stage, and the second current curve is a current curve corresponding to the gate-source voltage difference of the driving transistor in the light-emitting stage;
determining a transmission loss coefficient of a data signal according to the first current curve and the second current curve; and
compensating the driving voltage of each of the pixel circuits in the rectangular test area based on the transmission loss coefficient.