US 12,283,232 B2
Luminance compensation circuits, drive backplanes, and luminance compensation methods
Wei Wu, Guangdong (CN)
Assigned to Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., LTd., Guangzhou (CN)
Filed by Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., LTd., Guangdong (CN)
Filed on Dec. 7, 2023, as Appl. No. 18/531,822.
Claims priority of application No. 202211561378.X (CN), filed on Dec. 7, 2022.
Prior Publication US 2024/0194131 A1, Jun. 13, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/2096 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2360/145 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A luminance compensation circuit, comprising:
a light-emitting circuit configured to receive a data signal and emit light under an action of the data signal;
a luminance detector electrically connected to a first power terminal, a second power terminal, and a first node, and configured to control a magnitude of a voltage at the first node based on luminance of the light-emitting circuit and a first voltage at the first power terminal, and store the magnitude of the voltage wherein the luminance detector comprises:
a photosensitive device electrically connected to the first power terminal and the first node, and configured to control the magnitude of the voltage based on the luminance of the light-emitting circuit, and
a storage device electrically connected to the first node and the second power terminal, and configured to store the magnitude of the voltage;
a reading device electrically connected to the first node to read the magnitude of the voltage from the luminance detector; and
a timing controller electrically connected to the reading device and the light-emitting circuit, and configured to compensate for the data signal based on the magnitude of the voltage provided by the reading device.