US 12,169,611 B2
Position detection system and touch sensor
Haruhiko Hisano, Saitama (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on Jan. 23, 2024, as Appl. No. 18/419,985.
Application 18/419,985 is a continuation of application No. 17/703,848, filed on Mar. 24, 2022, granted, now 11,914,817.
Application 17/703,848 is a continuation of application No. 16/861,011, filed on Apr. 28, 2020, granted, now 11,294,506, issued on Apr. 5, 2022.
Application 16/861,011 is a continuation of application No. PCT/JP2017/039580, filed on Nov. 1, 2017.
Prior Publication US 2024/0184401 A1, Jun. 6, 2024
Int. Cl. G06F 3/03 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04182 (2019.05) [G06F 3/0412 (2013.01); G06F 3/04162 (2019.05); G06F 3/0442 (2019.05)] 15 Claims
OG exemplary drawing
 
1. An integrated circuit comprising one or more circuits configured to control a display device having a display surface, wherein the display surface is disposed over a sensor electrode of a touch panel including a touch sensor which communicates with an active pen by a charge induced in the sensor electrode using a frequency included in a predetermined frequency band, the circuit device being configured to control the display device by performing the following steps:
driving each of a plurality of pixel electrodes of the display device to display image data on the display surface; and
selectively operating in a first operation mode or a second operation mode, wherein
in the first operation mode, driving the plurality of pixel electrodes with noise suppression control, the noise suppression control being configured to suppress at least one frequency component included in the predetermined frequency band in capacitive noise that occurs in the sensor electrode due to a voltage vibration in an interconnect in the display device caused by driving of the plurality of pixel electrodes, and
in the second operation mode, driving the plurality of pixel electrodes without the noise suppression control;
wherein the capacitive noise in the first operation mode is suppressed compared with the capacitive noise in the second operation mode.