US 11,941,187 B2
Electronic pen and interface device including the same
Chul Kim, Hwaseong-si (KR); Yun-Ho Kim, Hwaseong-si (KR); and Jaeuk Choi, Seoul (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 13, 2022, as Appl. No. 18/064,963.
Application 18/064,963 is a continuation of application No. 17/507,954, filed on Oct. 22, 2021, granted, now 11,556,188.
Claims priority of application No. 10-2021-0022402 (KR), filed on Feb. 19, 2021.
Prior Publication US 2023/0113603 A1, Apr. 13, 2023
Int. Cl. G06F 3/046 (2006.01); G06F 3/0354 (2013.01); G06F 3/038 (2013.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03H 7/00 (2006.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01); G06F 3/0416 (2013.01); G06F 3/0446 (2019.05); G06F 3/046 (2013.01); G06F 2203/0384 (2013.01); H03H 7/00 (2013.01)] 18 Claims
OG exemplary drawing
 
11. An electronic device comprising:
a display layer;
a sensor layer disposed on the display layer, and comprising first electrodes and second electrodes; and
a touch driver configured to drive the sensor layer,
wherein, when an input device provides an output signal based on an electromagnetic resonance method and the input device approaches the sensor layer, an induced current flows in at least one electrode among the first electrodes and the second electrodes, and
wherein the touch driver generates a voltage signal based on the induced current,
wherein the touch driver comprises:
a charge amplifier, wherein a first input of the charge amplifier is electrically connected to the at least one electrode; and
a capacitor connected to the first input of the charge amplifier and an output of the charge amplifier, and wherein the capacitor receives the induced current and outputs the voltage signal based on the induced current.