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US 12,001,632 B2Granted
Touch sensing device and touch sensing method
AssigneeLx Semicon Co., Ltd.
InventorYang Been Lim
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a touch sensing device and a touch sensing method, and more particularly, to a touch sensing device and a touch sensing method to prevent a tracking error of touch coordinates.
Claims12
A touch sensing device comprising:
- a touch coordinate calculation circuit to calculate first touch coordinates for a touch input detected by touch electrodes at a first time point, to calculate second touch coordinates for a touch input detected by touch electrodes at a second time point, and to calculate third touch coordinates for a touch input detected by touch electrodes at a third time point;
- and
- a touch coordinate tracking circuit to assign a first touch ID to the first touch coordinates, to identify a first distance which is a distance between the first touch coordinate and the second touch coordinate, to assign the first touch ID to the second touch coordinates as well when the first distance is smaller than a first threshold value, to identify a second distance which is a distance between the second touch coordinates and the third touch coordinates, to determine a touch ID to be assigned to the third touch coordinates by using a first vector for the first and second touch coordinates and a second vector for the second and third touch coordinates when the second distance is smaller than the first threshold value, and to assign the determined touch ID to the third touch coordinates.
A touch sensing method comprising:
- calculating first touch coordinates for a touch input detected by touch electrodes at a first time point and assigning a first touch ID to the first touch coordinates;
- calculating second touch coordinates for a touch input detected by the touch electrodes at a second time point and identifying a first distance which is a distance between the first touch coordinates and the second touch coordinates;
- assigning the first touch ID to the second touch coordinates as well when the first distance is smaller than the first threshold value by comparing the first distance and a first threshold value;
- calculating third touch coordinates for a touch input detected by the touch electrodes at a third time point and identifying a second distance which is a distance between the second touch coordinates and the third touch coordinates;
- and
- determining a touch ID to be assigned to the third touch coordinates by using a first vector for the first and second touch coordinates and a second vector for the second and third touch coordinates when the second distance is smaller than the first threshold value by comparing the second distance and the first threshold value and assigning the determined touch ID to the third touch coordinates.
3 more elements
Dependencies are inferred from the claim text.