US 12,481,402 B2
Display apparatus
DongHoon Lee, Daegu (KR); TaeHoon Kim, Paju-si (KR); Jinwook Choi, Seoul (KR); and Dongjoong Cha, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 18, 2023, as Appl. No. 18/381,509.
Claims priority of application No. 10-2022-0135211 (KR), filed on Oct. 19, 2022.
Prior Publication US 2024/0134482 A1, Apr. 25, 2024
Prior Publication US 2024/0231540 A9, Jul. 11, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/0354 (2013.01); G06F 3/044 (2006.01); G09G 3/3233 (2016.01); H10K 59/131 (2023.01); H10K 59/40 (2023.01)
CPC G06F 3/04184 (2019.05) [G06F 3/03545 (2013.01); G06F 3/0412 (2013.01); G06F 3/041662 (2019.05); G09G 3/3233 (2013.01); G09G 2300/0842 (2013.01); G09G 2320/02 (2013.01); G09G 2354/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a panel including a plurality of sub pixels and a plurality of touch electrodes;
a first driving circuit configured to supply a driving signal to the panel in a driving period and hold the driving signal in a stand-by period; and
a second driving circuit configured to supply a mutual sensing signal to the panel in the driving period and supply a self-sensing signal to the panel in the stand-by period,
wherein the panel includes:
a first thin film transistor;
a second thin film transistor on a higher layer than the first thin film transistor;
a first planarization layer on the second-switching thin film transistor;
a connection electrode on the first planarization layer;
a second planarization layer on the connection electrode;
a first electrode on the second planarization layer;
a bank layer disposed on the second planarization layer and exposing the first electrode;
an emission layer on the first electrode;
a second electrode on the emission layer; and
an encapsulation unit on the second electrode,
wherein the plurality of touch electrodes is disposed on the encapsulation unit,
wherein the first electrode is connected to the second thin film transistor by the connection electrode,
wherein a first active layer of the first thin film transistor and a second active layer of the second thin film transistor are configured of different materials,
wherein the second driving circuit further supplies a pen sensing signal to the panel in the stand-by period, and
wherein a length of the stand-by period varies in accordance with a period in which the pen sensing signal is provided.
 
18. A display apparatus, comprising:
a panel including a plurality of sub pixels and a plurality of touch electrodes;
a first driving circuit configured to supply a driving signal to the panel in a driving period and hold the driving signal in a stand-by period; and
a second driving circuit configured to supply a self-sensing signal, a mutual sensing signal and a pen sensing signal to the panel in the stand-by period,
wherein the panel includes:
a first thin film transistor;
a second thin film transistor on the first thin film transistor;
a first planarization layer on the second thin film transistor;
a connection electrode on the first planarization layer;
a second planarization layer on the connection electrode;
a first electrode on the second planarization layer;
a bank layer disposed on the second planarization layer and exposing the first electrode;
an emission layer on the first electrode;
a second electrode on the emission layer; and
an encapsulation unit on the second electrode,
wherein the plurality of touch electrodes are disposed on the encapsulation layer,
wherein the first electrode is connected to the second thin film transistor by the connection electrode, wherein a first active layer of the first thin film transistor and a second active layer of the second thin film transistor are configured of different materials, and
wherein a length of the stand-by period varies in accordance with a period in which the pen sensing signal is provided.