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Touch control point detecting method of touch control plate

A detection method and touch point technology, which are applied in the input/output process of data processing, instruments, electrical and digital data processing, etc., can solve the problems of the wide application of capacitive touch panels, the inconvenience of users, and the inability to correctly judge the touch Point coordinates, etc.

Active Publication Date: 2009-03-25
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] see Figure 5 , when the known capacitive touch panel detects multiple points such as two-point touch, it cannot correctly judge the coordinates (A, A) and (C, C) of the actual touch point, but can only judge it as one area, a total of four Coordinates (A, A), (C, A), (C, C) and (A, C), where (C, A), (A, C) are actually virtual touch point coordinates
Therefore, when the obtained results are limited, it will cause inconvenience to users in many aspects, which is not conducive to the wide application of capacitive touch panels.

Method used

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  • Touch control point detecting method of touch control plate
  • Touch control point detecting method of touch control plate
  • Touch control point detecting method of touch control plate

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0033] Please also refer to figure 2 and image 3 , which shows that when the finger touches the capacitive touch panel, there is a time difference between the touch gestures of points A and C.

[0034] like figure 2As shown, in the early stage of touch, a touch point A is detected, indicating that a finger is touching the capacitive touch panel; record the coordinate value Xa of the touch point A in the X-axis direction and the coordinate value Ya in the Y-axis direction . Wherein, the detection of the touch point A (Xa, Ya) can be performed by a sensor (not shown) electrically coupled to the capacitive touch panel.

[0035] like image 3 As shown, in the touch period after the initial touch period, since two fingers are touching the capacitive touch panel at the same time, multiple touch possible points A, B, C and D can be detected. Among them, point A has been determined as a touch point at the initial stage of touch, and B, C, and D are newly added possible touch p...

no. 2 example

[0038] Please also refer to Figure 3 to Figure 4 , which shows that when the finger leaves the capacitive touch panel, there is a time difference between the touch gestures of points A and C.

[0039] like image 3 As shown, in the touch period, since two fingers touch the capacitive touch panel at the same time, multiple touch possible points A, B, C and D can be detected. The coordinate values ​​Xa, Xc, Xc and Xa of the multiple touch possible points A, B, C and D in the X-axis direction and the coordinate values ​​Ya, Ya, Yc and Yc in the Y-axis direction are recorded. Among them, the detection of multiple possible touch points A (Xa, Ya), B (Xc, Ya), C (Xc, Yc) and D (Xa, Yc) can be electrically coupled to the capacitive touch panel sensors (not shown in the figure) to perform. Among them, the plurality of possible touch points A, B, C and D include a plurality of touch points A and C that actually touch the capacitive touch panel, and a plurality of touch points A tha...

no. 3 example

[0042] Please also refer to Figure 2 to Figure 4 , which shows that when the finger touches and leaves the capacitive touch panel, there is a time difference between the touch gestures of points A and C.

[0043] like figure 2 As shown, in the early stage of touch, a touch point A is detected, indicating that a finger touches the capacitive touch panel; the coordinate value Xa of the touch point A in the X-axis direction and the coordinate value Ya in the Y-axis direction are recorded. Wherein, the detection of the touch point A (Xa, Ya) can be performed by a sensor (not shown) electrically coupled to the capacitive touch panel.

[0044] like image 3 As shown, in the touch period after the initial touch period, since two fingers touch the capacitive touch panel at the same time, multiple touch possible points A, B, C and D can be detected. Among them, touch possible point A has been determined as a touch point at the initial stage of touch, and B, C, and D are newly adde...

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Abstract

The invention relates to a touch point detection method for a touch pad, which is suitable to accurately detect a plurality of touch points on the touch pad. The touch point detection method for the touch pad comprises the following steps: the touch pad is periodically scanned; when the touch pad is scanned and a first touch point is detected for the very first time, coordinate values of the first touch point in the first dimension direction and the second dimension direction are recorded; the touch pad is continuously scanned after the very first time; and after the very first time, when a plurality of newly increased possible touch points are detected for the very second time, the position of a second contact point is judged from a plurality of the newly increased possible touch points according to the coordinate values of the first touch point in the first dimension direction and the second dimension direction. The touch point detection method for the touch pad can realize detection of a plurality of contact points the number of which is two or more than two.

Description

technical field [0001] The invention relates to the field of multi-touch technology, and in particular to a touch point detection method of a touch panel, which is suitable for correctly detecting multiple touch points on a touch panel. Background technique [0002] Due to its small size, low cost, low power consumption and long service life, the touch panel is widely used as an input device on various electronic products. Objects) slide or touch on the panel to make the cursor move relative or with absolute coordinates, and various inputs including text writing, scrolling windows and virtual buttons can be completed. [0003] According to the type of objects used and the method of determining the position of the touch point, touch panels can be roughly divided into capacitive, resistive, electromagnetic, surface acoustic wave and infrared touch panels. Among them, the capacitive touch panel is an input device that allows the finger to move on a smooth panel to control the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
Inventor 廖士权许育民
Owner AU OPTRONICS CORP