COORDINATE ALGORITHM OF TOUCH PANEL

• US 20120098759A1
• Filed: 12/10/2010
• Published: 04/26/2012
• Est. Priority Date: 10/26/2010
• Status: Active Grant

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Chang, Hui-Hung
• Granted Patent: US 9,069,409 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A coordinate algorithm of a touch panel is provided, in which the touch panel includes a plurality of first-direction sensing lines and a plurality of second-direction sensing lines. The coordinate algorithm of a touch panel includes following steps. A first edge coordinate is obtained. A first coordinate compensation parameter is defined. The first edge coordinate is taken as a first base coordinate, and the first base coordinate is adjusted according to the first coordinate compensation parameter to obtain a first interpolation coordinate when an edge of the touch panel is touched.

Claims

1. A coordinate algorithm of a touch panel, wherein the touch panel comprises a plurality of first-direction sensing lines and a plurality of second-direction sensing lines, the coordinate algorithm comprising:

obtaining a first edge coordinate;

defining a first coordinate compensation parameter; and

taking the first edge coordinate as a first base coordinate, and adjusting the first base coordinate according to the first coordinate compensation parameter to obtain a first interpolation coordinate when a first edge of the touch panel is touched.

2. The coordinate algorithm of a touch panel according to claim 1, wherein M stages of first-direction coordinates are differentiated between two of the neighboring first-direction sensing lines, and M is a positive integer.

3. The coordinate algorithm of a touch panel according to claim 2, wherein the step of defining the first coordinate compensation parameter comprises:

defining the first coordinate compensation parameter according to the M value.

4. The coordinate algorithm of a touch panel according to claim 1, wherein the step of defining the first coordinate compensation parameter comprises:

defining the first coordinate compensation parameter according to the number of the first-direction sensing lines.

5. The coordinate algorithm of a touch panel according to claim 1, wherein the touch panel further comprises a dummy line, and the coordinate algorithm further comprises:

scaling the first interpolation coordinate according to an area difference between the touched first-direction sensing line and the dummy line.

6. The coordinate algorithm of a touch panel according to claim 1, further comprising:

obtaining a second edge coordinate;

defining a second coordinate compensation parameter; and

taking the second edge coordinate as a second base coordinate, and adjusting the second base coordinate according to the second coordinate compensation parameter to obtain a second interpolation coordinate when the first edge or a second edge of the touch panel is touched.

7. The coordinate algorithm of a touch panel according to claim 6, wherein N stages of second-direction coordinates are differentiated between two of the neighboring second-direction sensing lines, and N is a positive integer.

8. The coordinate algorithm of a touch panel according to claim 7, wherein the step of defining the second coordinate compensation parameter comprises:

defining the second coordinate compensation parameter according to the N value.

9. The coordinate algorithm of a touch panel according to claim 6, wherein the step of defining the second coordinate compensation parameter comprises:

defining the second coordinate compensation parameter according to the number of the second-direction sensing lines.

10. The coordinate algorithm of a touch panel according to claim 6, wherein the touch panel further comprises a dummy line, and the coordinate algorithm further comprises:

scaling the second interpolation coordinate according to an area difference between the touched second-direction sensing line and the dummy line.

11. The coordinate algorithm of a touch panel according to claim 1, wherein an arrangement direction of the first-direction sensing lines is substantially perpendicular to an arrangement direction of the second-direction sensing lines.