US 11,995,257 B2
Transparent touch display device
JuHong Kim, Incheon (KR); and HwiDeuk Lee, Gumi-si (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Dec. 20, 2022, as Appl. No. 18/068,880.
Claims priority of application No. 10-2021-0194464 (KR), filed on Dec. 31, 2021.
Prior Publication US 2023/0214039 A1, Jul. 6, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/0412 (2013.01) [G06F 3/044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A transparent touch display device comprising:
a display panel including a plurality of sub-pixels and a plurality of touch electrodes; and
a touch driving circuit for driving the plurality of touch electrodes,
wherein the display panel includes:
a substrate including a pixel area in which at least one of the plurality of sub-pixels is disposed, a first transmission area located on a first side of the pixel area, and a second transmission area located on a second side of the pixel area;
a driving transistor disposed in the pixel area;
an anode electrode disposed in the pixel area and electrically connected to a source electrode or a drain electrode of the driving transistor;
an emission layer located on the anode electrode;
a display cathode electrode located on the emission layer;
a first touch cathode electrode disposed in the first transmission area and located on a first side of the display cathode electrode;
a second touch cathode electrode disposed in the second transmission area and located on a second side of the display cathode electrode;
a first touch line electrically connected to at least one of the first touch cathode electrode and the second touch cathode electrode; and
a first upper touch shield disposed over the first touch line and overlapped with at least a portion of the first touch line, wherein the first upper touch shield has an equipotential with the first touch line,
wherein a maximum separation distance between the first touch cathode electrode and the substrate and a maximum separation distance between the second touch cathode electrode and the substrate each is shorter than a maximum separation distance between the display cathode electrode and the substrate.