US 12,223,886 B2
Display apparatus including light emitting device and pixel driving circuit
Kyung Mo Son, Paju-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 12, 2023, as Appl. No. 18/485,944.
Claims priority of application No. 10-2022-0172483 (KR), filed on Dec. 12, 2022.
Prior Publication US 2024/0194126 A1, Jun. 13, 2024
Int. Cl. G09G 3/32 (2016.01); H01L 25/075 (2006.01); H01L 25/16 (2023.01); H01L 33/62 (2010.01)
CPC G09G 3/32 (2013.01) [H01L 25/0753 (2013.01); H01L 25/167 (2013.01); H01L 33/62 (2013.01); G09G 2310/0294 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a sampling light shielding pattern disposed on a device substrate;
an upper buffer layer disposed on the device substrate while covering the sampling light shielding pattern;
a pixel driving circuit disposed on the upper buffer layer, the pixel driving circuit including:
a driving thin film transistor including a driving gate electrode and a driving source electrode; and
a plurality of switching thin film transistors including a sampling thin film transistor electrically connected between the driving gate electrode and the driving source electrode of the driving thin film transistor; and
a light emitting device disposed on the device substrate and electrically connected to the pixel driving circuit,
wherein the sampling thin film transistor comprises a sampling gate electrode overlapping with the sampling light shielding pattern, and a sampling semiconductor pattern disposed between the sampling light shielding pattern and the sampling gate electrode, and
wherein the sampling gate electrode comprises a first electrode region extending onto a first side surface of the sampling semiconductor pattern.