Touch sensing device and touch sensing method
AssigneeLx Semicon Co., Ltd.
InventorYoung Eun Lee
Life of this patent
Estimating the term…
Abstract
In an aspect of the present disclosure, a touch sensing device is provided. The touch sensing device includes: a first circuit configured to supply a driving signal to a touch electrode of a panel; a second circuit configured to sense a change in capacitance of the touch electrode caused by a user touch; and a third circuit configured to: calculate a touch coordinate based on the sensed capacitance change; determine a touch area based on the touch coordinate; and determine the user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and the touch area.
Claims21
A touch sensing device comprising:
- a first circuit configured to supply a driving signal to a touch electrode of a panel;
- a second circuit configured to sense a change in capacitance of the touch electrode;
- and
- a third circuit including:
- a touch signal processor configured to generate sensing data including a sensing value for each touch node based on the sensed capacitance change;
- a coordinate calculator configured to calculate a touch presence and a touch coordinate based on the sensing data;
- and
- a touch determiner configured to determine a user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and a touch area,
- wherein the touch determiner includes:
- a touch area determiner configured to determine the touch area based on the touch coordinate, wherein the touch area has a first touch area, a second touch area located around the first touch area, and a third touch area placed between the first touch area and the second touch area;
- and
- a ratio calculator configured to calculate the touch ratio between touch nodes placed on each of at least two lines among the plurality of lines when the touch coordinate is located within the third touch area.
A touch sensing method comprising:
- supplying a driving signal to a touch electrode of a panel;
- sensing a change in capacitance of the touch electrode;
- generating a sensing data including a sensing value for each of touch node based on the sensed capacitance change;
- calculating a touch presence and a touch coordinate based on the sensing data;
- and
- determining a user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and a touch area,
- wherein the determining the user touch includes;
- determining the touch area based on the touch coordinate, wherein the touch area has a first touch area, a second touch area located around the first touch area, and a third touch area placed between the first touch area and the second touch area;
- and
- calculating the touch ratio between touch nodes placed on each of at least two lines among the plurality of lines when the touch coordinate is located within the third touch area.
Dependencies are inferred from the claim text.