Touch sensing device and touch sensing method
AssigneeLx Semicon Co., Ltd.
InventorsYoung Eun LEE, Gyu Min GIL
Life of this patent
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Abstract
An embodiment of the present invention relates to a touch sensing device which drives a touch screen panel comprising: a touch driving electrode extending in a first direction; and a touch sensing electrode extending in a second direction perpendicular to the first direction. The touch sensing device comprises: a first driving unit and a second driving unit, which are driven in at least one among a mutual sensing mode, a first self-sensing mode, and a second self-sensing mode; and a control unit for determining a touch situation on the basis of a mutual sensing signal, which is input according to the mutual sensing mode, to drive the first driving unit and the second driving unit in the first self-sensing mode or the second self-sensing mode.
Claims15
A touch sensing device, which drives a touch screen panel including a touch driving electrode extending in a first direction and a touch sensing electrode extending in a second direction perpendicular to the first direction, the touch sensing device comprising:
- a first driving unit and a second driving unit which are driven in at least one of a mutual sensing mode, a first self-sensing mode, and a second self-sensing mode;
- and
- a control unit configured to determine a touch situation on the basis of a mutual sensing signal input according to the mutual sensing mode and drive the first driving unit and the second driving unit in the first self-sensing mode or the second self-sensing mode,
- wherein, when a normal touch situation is determined by the control unit, the first driving unit and the second driving unit are driven in the first self-sensing mode and supply touch driving signals with different polarities to channels connected to adjacent touch driving electrodes or channels connected to adjacent touch sensing electrodes during a first frame, and
- when an abnormal touch situation is determined by the control unit, the first driving unit and the second driving unit are driven in the second self-sensing mode and supply touch driving signals with one polarity to channels connected to one or more touch driving electrodes or channels connected to one or more touch sensing electrodes during the first frame.
A touch sensing method, which drives a touch screen panel including a touch driving electrode extending in a first direction and a touch sensing electrode extending in a second direction perpendicular to the first direction, the touch sensing method comprising:
- driving the touch screen panel in a mutual sensing mode and a first self-sensing mode;
- determining an abnormal touch situation using a mutual sensing signal input according to the mutual sensing mode;
- when a normal touch situation is determined, driving the touch screen panel in the first self-sensing mode to receive a first self-sensing signal, and calculating touch coordinates using the mutual sensing signal or the first self-sensing signal;
- and
- when the abnormal touch situation is determined, driving the touch screen panel in a second self-sensing mode to receive a second self-sensing signal, and calculating touch coordinates using the mutual sensing signal or the second self-sensing signal,
- wherein, in the first self-sensing mode, during a first frame, touch driving signals with different polarities are output to channels connected to adjacent touch driving electrodes or channels connected to adjacent touch sensing electrodes at the same timing, and
- in the second self-sensing mode, touch driving signals with one polarity are output to channels connected to one or more touch driving electrodes or channels connected to one or more touch sensing electrodes during the first frame.
Dependencies are inferred from the claim text.