Method for driving a touch panel device

• US 7,209,125 B2
• Filed: 12/22/2003
• Issued: 04/24/2007
• Est. Priority Date: 12/23/2002
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kong, Nam Yong, Lee, Cheon Suck
• Primary Examiner(s): Tran; Henry N.
• Application Number:
  US10/740,504
• Publication Number:
  US 20040130537A1
• Time in Patent Office: 1,219 Days
• Field of Search: 345/173-179 178/18.01,18.02,18.03,18.1,19.01,19.03,19.04,20.01
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A method for driving a touch panel that detects and compensates a double touch includes sequentially inputting coordinate values of touched points on the touch panel at predetermined time intervals, measuring a variation of the inputted coordinate values, determining the inputted coordinate values as a double touch when the measured variation is greater than a predetermined value, and compensating the inputted coordinate values if determined as a double touch.

Claims

1. A method for driving a touch panel comprising:

sequentially inputting coordinate values of touched points on the touch panel at predetermined time intervals;

measuring a variation of the inputted coordinate values;

determining the inputted coordinate values as a double touch when the measured variation is greater than a predetermined value; and

compensating the inputted coordinate values if determined as a double touch.

2. The method of claim 1, wherein the step of measuring measures variation of the inputted coordinate values along an X-axis or a Y-axis direction.

3. The method of claim 1, wherein the step of compensating the inputted coordinate values is performed by subtracting the measured variation from the inputted coordinates.

4. A method for driving a touch panel comprising:

sequentially inputting coordinate values corresponding to at least two portions touched on the touch panel at predetermined time intervals;

measuring a variation of the inputted coordinate values;

determining the inputted coordinate values as a double touch if the measured variation is greater than a predetermined value; and

compensating the inputted coordinate values based on whether they are determined as a double touch.

5. The method of claim 4, wherein the step of measuring measures the variation of the input coordinate values along an X-axis or a Y-axis direction.

6. The method of claim 4, wherein the step of compensating the input coordinate values is performed by subtracting the measured variation from the inputted coordinate value.

7. A method for driving a touch panel comprising:

sequentially inputting coordinate values corresponding to at least two portions touched on the touch panel at predetermined time intervals;

measuring a variation of the inputted coordinate values;

detecting whether the measured variation is greater than a predetermined value;

detecting whether the coordinate values were compensated previously;

compensating the inputted coordinate values when the measured variation is detected to be greater than the predetermined value, and when the coordinate values were not compensated previously;

compensating the inputted coordinate values when the measured variation is detected not to be greater than the predetermined value, and when the coordinate values were compensated previously;

recognizing the inputted coordinate values as substantial coordinate values when the measured variation is detected to be greater than the predetermined value, and when the coordinate values were compensated previously; and

recognizing the inputted coordinate values as the substantial coordinate values when the measured variation is detected to be less than the predetermined value, and when the coordinate values were not compensated previously.

8. The method of claim 7, wherein the step of compensating the inputted coordinate values when the measured variation is detected not to be greater than the predetermined value, and when the coordinate values were compensated previously, is performed by subtracting the measured variation from the inputted coordinate values.

9. The method of claim 7, further comprising a step for storing the measured variation of the coordinate values, after the inputted coordinate values are compensated when the measured variation is detected to be greater than the predetermined value, and when the coordinate values were not compensated previously.

10. The method of claim 9, wherein the step for compensating the inputted coordinate values when the measured variation is detected not to be greater than the predetermined value, and when the coordinate values were compensated previously, is performed by subtracting the stored variation from the inputted coordinate values.

11. The method of claim 7, wherein the step of measuring measures the variation of the input coordinate values along an X-axis or a Y-axis direction.