US 12,223,152 B2
Touch input device
Seyeob Kim, Seongnam-si (KR); Bonkee Kim, Seongnam-si (KR); Jongsik Kim, Seongnam-si (KR); and Young Ho Cho, Seongnam-si (KR)
Assigned to HiDeep Inc., (KR)
Filed by HiDeep Inc., Seongnam-si (KR)
Filed on Feb. 16, 2023, as Appl. No. 18/110,867.
Application 18/110,867 is a continuation of application No. 17/105,691, filed on Nov. 27, 2020, granted, now 11,614,844.
Claims priority of application No. 10-2019-0154921 (KR), filed on Nov. 27, 2019.
Prior Publication US 2023/0195273 A1, Jun. 22, 2023
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/0447 (2019.05) [G06F 3/0418 (2013.01); G06F 3/04186 (2019.05); G06F 3/044 (2013.01); G06F 3/0445 (2019.05); G06F 3/0446 (2019.05); G06F 3/0448 (2019.05); G06F 3/0443 (2019.05); G06F 2203/04104 (2013.01); G06F 2203/04106 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A touch input device having a touch surface, the touch input device comprising:
a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes;
a touch detection unit configured to:
apply a driving signal to at least one first driving electrode among the plurality of driving electrodes;
detect a first receiving signal associated with a touch position of an object input to the touch surface from a first receiving electrode among the plurality of receiving electrodes,
detect a second receiving signal associated with a low ground mass (LGM) disturbance signal from a second receiving electrode among the plurality of receiving electrodes; and
detect whether or not the object has been touched and a touch position based on a signal obtained by subtracting the second receiving signal from the first receiving signal;
wherein the first receiving electrode among the plurality of receiving electrodes forms a mutual capacitance with the first driving electrode,
wherein the second receiving electrode among the plurality of receiving electrodes does not form the mutual capacitance with the first driving electrode,
wherein, when the driving signal is applied to a second driving electrode different from the first driving electrode by the controller, the first receiving electrode does not form the mutual capacitance with the second driving electrode, and the second receiving electrode forms the mutual capacitance with the second driving electrode,
wherein the first receiving signal includes information on the amount of change in capacitance due to the touch of the object and noise information,
wherein the second receiving signal includes the noise information, and
wherein the noise information includes a display noise information, a change amount information according to a change in an image displayed on a display panel, and a change amount of capacitance due to the LGM disturbance signal generated in a floating state.