Method of determining touch coordinate and touch panel assembly for performing the same

摘要

A method of determining a touch coordinate in a touch panel includes detecting a touch cell among a plurality of touch cells, wherein the plurality of touch cells are defined by a plurality of areas in the touch panel in which a first touch electrode and a second touch electrode overlap with each other, detecting a touch position in the detected touch cell based on a first electrical signal measured at least one of a plurality of terminals of the first and second touch electrodes, determining a number of touches based on a distance between a first touch and a second touch, determining expected touch coordinates corresponding to the number of touches, and determining the touch coordinate based on a second electrical signal measured at least one of the plurality of terminals of the first and second touch electrodes and the expected touch coordinates.

主权项

1. A method of determining a touch coordinate in a touch panel, comprising:
detecting a touch cell among a plurality of touch cells, wherein the plurality of touch cells are defined by a plurality of areas in the touch panel in which a first touch electrode and a second touch electrode overlap with each other; detecting a touch position in the detected touch cell based on a first electrical signal measured at at least one of a plurality of terminals of the first and second touch electrodes; determining a number of touches based on a distance between a first touch and a second touch; determining expected touch coordinates, wherein the expected touch coordinates correspond to the touch position when the number of touches is one, and the expected touch coordinates are based on a central point between the first and second touches and the distance between the first and second touches when the number of touches is two; and determining the touch coordinate from among the expected touch coordinates based on a voltage measured at at least one of the plurality of terminals of the first and second touch electrodes, wherein the touch panel comprises a first substrate and a second substrate overlapping the first substrate, the first substrate comprises at least one first touch electrode, and the second substrate comprises at least one second touch electrode, wherein the first touch electrode comprises a first terminal extending along a first side of the first touch electrode in a first direction, and a second terminal extending along a second side of the first touch electrode in the first direction, wherein the first and second sides of the first touch electrode oppose each other, and the second touch electrode comprises a third terminal extending along a first side of the second touch electrode in a second direction crossing the first direction, and a fourth terminal extending along a second side of the second touch electrode in the second direction, wherein the first and second sides of the second touch electrode oppose each other, wherein determining the touch coordinate from among the expected touch coordinates comprises applying a source voltage to the first terminal and a ground voltage to the second terminal, and measuring a first voltage at the third terminal and a second voltage at the fourth terminal while the source voltage is applied to the first terminal and the ground voltage is applied to the second terminal, wherein determining the touch coordinate further comprises calculating a single difference between the first and second voltages while the source voltage is applied to the first terminal and the ground voltage is applied to the second terminal, in response to determining that the number of touches is two, and wherein a first expected touch coordinate is determined as the touch coordinate when the first voltage is greater than the second voltage and a second expected touch coordinate is determined as the touch coordinate when the second voltage is greater than the first voltage.