US 11,899,878 B2
Input sensing device and display device having the same
Choon Hyop Lee, Yongin-si (KR); Jang Hui Kim, Yongin-si (KR); Jae Won Kim, Yongin-si (KR); and In Nam Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 29, 2022, as Appl. No. 18/148,253.
Application 18/148,253 is a continuation of application No. 17/711,594, filed on Apr. 1, 2022, granted, now 11,543,914.
Claims priority of application No. 10-2021-0045922 (KR), filed on Apr. 8, 2021.
Prior Publication US 2023/0136412 A1, May 4, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03M 1/18 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/044 (2013.01); G06F 3/04164 (2019.05); H03M 1/18 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An input sensing device, comprising:
electrodes;
a signal processor; and
an analog front-end coupled between the electrodes and the signal processor,
wherein the analog front-end comprises:
a first charge amplifier including input terminals electrically coupled to two electrodes among the electrodes;
a first demodulation circuit electrically coupled to output terminals of the first charge amplifier;
a first analog-to-digital converter coupled to the first demodulation circuit;
a second charge amplifier selectively coupled between the output terminals of the first charge amplifier and input terminals of the first demodulation circuit; and
switching components configured to, in a first mode, couple the output terminals of the first charge amplifier and the first demodulation circuit, and, in a second mode, couple the output terminals of the first charge amplifier and input terminals of the second charge amplifier and couple output terminals of the second charge amplifier and the first demodulation circuit.