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# A Method of Coordinates Detection on a Damaged Touch Panel

IP.com Disclosure Number: IPCOM000013674D
Original Publication Date: 2000-Apr-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 1 page(s) / 50K

IBM

## Abstract

This article describes a method of coordinates detection on a damaged touch panel. An analog resisitive touch panel which has a flaw often detect wrong coordinates because the flaw press the dame But this method allows emergency use of the damaged touch panel until it is repaired. Analog resistive touch panel indicate the middle point when two points are pressed at once, Therefore, when the touch panel driver has the coodinates of the dameged point, the touched point can be figured Mouse or Keyboard operation is required for the touch panel driver to recognize the dameged point. Dam aged Point (Xd,Yd) D etected P oint by Touch P anel (Xs,Ys)

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A Method of Coordinates Detection on a Damaged Touch Panel

This article describes a method of coordinates detection on a damaged touch panel.
An analog resisitive touch panel which has a flaw often detect wrong coordinates because the flaw press the dame
But this method allows emergency use of the damaged touch panel until it is repaired.

Analog resistive touch panel indicate the middle point when two points are pressed at once,
Therefore, when the touch panel driver has the coodinates of the dameged point, the touched point can be figured
Mouse or Keyboard operation is required for the touch panel driver to recognize the dameged point.

Dam aged Point (Xd,Yd)

D etected P oint by Touch P anel (Xs,Ys)

Touched P oint (Xt,Yt)

(Xs,Ys) is the m iddle point of (Xd, Yd) and (Xt,Yt)

XXs = t + Xd

2

YYs = t + Yd

2

Therefore the coordinates of a touched point is;

Xt = 2Xs - Xd Yt = 2Ys - Yd

1