US 11,733,810 B2
Touch display device
Takayuki Suzuki, Tokyo (JP); Tomonori Miyokawa, Tokyo (JP); Tsutomu Ichikawa, Tokyo (JP); Jae-Hun Ye, Paju-si (KR); and Shinji Takasugi, Tokyo (JP)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Oct. 6, 2021, as Appl. No. 17/495,422.
Claims priority of application No. 2020-172731 (JP), filed on Oct. 13, 2020.
Prior Publication US 2022/0113821 A1, Apr. 14, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/044 (2013.01) [G06F 3/0412 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A touch display device comprising:
a first electrode and a second electrode which are installed inside a display panel and face each other to form a capacitance;
a first coil installed inside the display panel and connected to the first electrode and the second electrode; and
a second coil installed inside the display panel and having a mutual induction with the first coil to generate a current in the second coil by the mutual induction,
wherein the touch display device conducts a touch detection by the generated current,
wherein when the capacitance is changed, a current flows in the first coil to produce a magnetic field from the first coil, and
wherein the current of the second coil is generated by the magnetic field from the first coil.