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Touch panel device

A technology of touch panel and touch area, which is applied in the direction of instrument, electrical digital data processing, user/computer interaction input/output, etc., to achieve the effect of reducing the fluctuation of excitation intensity

Inactive Publication Date: 2006-02-22
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the viewpoint of complication and cost of the manufacturing process of the converter, it is desirable to avoid adding a terminating resistor as much as possible.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0036] figure 1 is a front view of the touch panel device 1 according to the first embodiment of the present invention, figure 2 It is an enlarged view showing a part of the touch panel device 1, image 3 is an enlarged cross-sectional view showing part of the converter 20 of the touch panel device 1, Figure 4 is a diagram illustrating the position of the connecting portion SB, Figure 5 is a diagram showing an example of the voltage distribution of the converter 20, Image 6 is a diagram showing an equivalent circuit of the converter 20, Figure 7 It is a figure which shows the example of the time of an excitation signal and a reception signal.

[0037] exist figure 1 Among them, the touch panel device 1 is configured by providing four transducers 20a to 20d on the periphery of a rectangular transparent glass substrate 11, and further, wiring electrodes 30a to 30d, 31a to 31d are provided along the outer periphery thereof. The central portion of the touch panel device...

no. 2 approach

[0065] In the first embodiment described above, the number of feed points for the plate electrode 22 and the comb electrode 23 of the converter 20 is one. Next, a case where power is supplied to the plate electrode 22 and the comb electrode 23 from two places will be described.

[0066] Figure 8is a front view of a touch panel device 1B according to a second embodiment of the present invention, Figure 9 It is a figure which shows the modification of the connection of the connection part SB and the wiring electrodes 30 and 31. exist Figure 8 , because the basic structure is the same as figure 1 Since the touch panel device 1 of the first embodiment shown is the same, only the differences therebetween will be described.

[0067] exist Figure 8 In the illustrated touch panel device 1B, for each transducer 20 , there are two connecting portions SB between the comb electrodes 23 and the plate electrodes 22 and the wiring electrodes 30 and 31 . These connecting portions SB...

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PUM

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Abstract

The invention provides a touch panel device capable of suppressing the influence of reflected waves on a terminal to reduce the variation of excitation intensity of a surface acoustic wave without using a terminating resistance. An excitation transducer comprises two electrodes (22) and (23) in which at least one electrode is a pectinate electrode (23) with a plurality of pectinate electrode branches (24) and a linear bus electrode (25) connected with one end of each of the plurality of pectinate electrode branches. When the transducer is divided into two areas in the length direction of the bus electrode (25), at least one connection portion (SB) for one of the two electrodes (22) and (23) is arranged in one of the two areas, while at least one connection portion (SB) for the other electrode is arranged in the other area.

Description

technical field [0001] The present invention relates to a touch panel device that detects the attenuation position of a surface acoustic wave caused by contact with an object to detect the contact position of the object, and is used, for example, as an input device for a personal computer or a portable information terminal. Background technique [0002] As an input device such as a personal computer, a mobile computer, or a personal digital assistant (PDA: Personal Digital Assistant), a touch panel device for inputting information by touching a finger or a pen on the display surface of a display device is often used. [0003] As such a touch panel device, there are a touch panel device using a resistive film and a touch panel device using a surface acoustic wave (SAW: Surface Acoustic Wave). In the touch panel device of the resistive film system, since a multilayer resistive film is formed on the touch area, the light is disturbed and the transmittance is low. In a surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K11/06
CPCG06F3/0436G06F3/03
Inventor 胜木隆史佐野聪高桥勇治中泽文彦
Owner FUJITSU LTD