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Periphery electrode width changeable contact screen

A technology of electrode width and touch screen, applied in instruments, semiconductor devices, computer parts, etc., can solve the problems of high manufacturing cost of switching elements, complicated electrode design, complicated process, etc., and achieve the effect of improving linearity and expanding linear touch area.

Inactive Publication Date: 2003-08-27
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of switching elements is rarely used at present because of the high manufacturing cost and complicated additional process; the curved electrode adopts graphic correction, and the design is simple, but its electrode width D plus the bending amount H of the electrode (such as figure 2 As shown), the linear touch positioning area 51 will be relatively reduced. Although the width of the electrode can be made very narrow in theory, considering the uniformity of the manufacturing process and the resistance distribution on the electrode, the electrode width should not be too narrow; and the precise resistance network design technology, and its electrode design is more complicated

Method used

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  • Periphery electrode width changeable contact screen
  • Periphery electrode width changeable contact screen
  • Periphery electrode width changeable contact screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as image 3 , the inner contour lines 71 of the electrodes 22, 23, 24, 25 are curves, and their bending tendency is consistent with the bending tendency of the positioning curve 50 of the electrodes of equal width. The outer contours 72 of the electrodes 22, 23, 24, 25 are straight lines such that the width of the electrodes gradually increases from the corners to the center. In this embodiment, the inner contour line 71 of the electrode with variable width corrects the electric field nonlinearity similarly to that of the equal-width curved electrode (see US Patents 3,798,370 and 4,198,519). However, due to the change of electrode width, the potential gradient along the electrode changes gradually, and its effect is the same as that of a precise resistance network (see US Patent 4661655, 4822957). Therefore, the electrodes with variable width play a double correction role on the nonlinearity of the electric field distribution, thereby Its linear touch positioning ...

Embodiment 2

[0028] Such as Figure 4 , the inner contour line 71 of the electrodes 22, 23, 24, 25 is a curve, and its bending change trend is consistent with the bending change trend of the positioning curve 50 of the equal width electrode; the outer contour line 72 of the electrodes 22, 23, 24, 25 is a curve .

Embodiment 3

[0030] Such as Figure 4 , the inner contour lines 71 of the electrodes 22, 23, 24, 25 are curves, and their bending trend is consistent with that of the positioning curve 50 of the equal-width electrodes; the outer contour lines 72 of the electrodes 22, 23, 24, 25 are broken lines .

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Abstract

The coordinates of the touch point on the touch screen are determined by the electrical signal of the touch point on the conducting film possessing the distribution of electric field. The inner contour line of the electrode around the conducting film forming the said distribution of electric field is a curve line. The trend of the curve change of the inner contour line is consistent with the trend of the ordination curve of the equivalent width electrode. The outer contour line can be straight line, curve lineor polygonal line. The non-linear distribution of electric field can be multiple corrected in order to expand the linear touch positioning area.

Description

technical field [0001] The invention relates to a touch screen, in particular to a touch screen for locating the coordinates of the touch point by detecting the electric signal of the touch point on a conductive film with electric field distribution. Background technique [0002] At present, the touch screen that locates the coordinates of the touch point by detecting the electrical signal of the touch point on the conductive film needs: a conductive working plate 2 that makes (usually) a rectangular conductive film 20 on a transparent substrate 21, and makes electrodes around the conductive film 20 22, 23, 24, 25, adjacent electrodes are connected at four corners 31 and electrode leads 32 are made; and a detection device capable of detecting electrical signals from the conductive film 20. The above-mentioned device can be a conductive film 10 made on the lower surface of the transparent soft film 11 and connected to the controller 34 through the detection electrode 13 and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K11/06H01L21/28
Inventor 刘忠安
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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