US 11,869,436 B2
Subpixel circuit, display panel, and display device
CheolSe Kim, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Oct. 13, 2022, as Appl. No. 17/965,426.
Claims priority of application No. 10-2021-0182401 (KR), filed on Dec. 20, 2021.
Prior Publication US 2023/0197002 A1, Jun. 22, 2023
Int. Cl. G09G 3/3233 (2016.01); G09G 3/3266 (2016.01); G09G 3/3291 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 3/3266 (2013.01); G09G 3/3291 (2013.01); G09G 2300/0852 (2013.01); G09G 2310/0278 (2013.01); G09G 2310/061 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A subpixel circuit for operating at least one of a plurality of subpixels disposed on a display panel, the subpixel circuit comprising:
a light emitting circuit including a light emitting element to receive a high-potential voltage, the light emitting circuit being configured to control the light emitting element according to a driving voltage and to output a control voltage;
a reference circuit configured to receive the control voltage and a low-potential voltage and to control a driving current flowing through the light emitting element;
an amplification circuit configured to compare the control voltage and a data voltage to generate the driving voltage for controlling the light emitting circuit; and
an input circuit configured to receive the data voltage and a first scan signal and to control a timing of applying the data voltage to the amplification circuit based on the first scan signal,
wherein the amplification circuit includes:
a control transistor having a gate node to receive the control voltage and a source node to supply the driving voltage to the light emitting circuit; and
a first capacitor connected to the source node of the control transistor to transfer an input power voltage.