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Surface acoustic wave type sensing apparatus of touching control panel

A touch panel, surface acoustic wave technology, applied in the input/output process of data processing, instruments, electrical digital data processing and other directions, can solve problems such as unsatisfactory sensing

Active Publication Date: 2009-02-25
EGALAX EMPIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the aforementioned surface acoustic wave touch panel with reflectors arranged sparsely and densely still has its disadvantages. Because the reflectors at the front of each reflector row are sparsely arranged, some input contact positions have gaps between The inclination between the vibration waves reflected by two adjacent reflectors, so the position of the input contacts is less ideal for sensing

Method used

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  • Surface acoustic wave type sensing apparatus of touching control panel
  • Surface acoustic wave type sensing apparatus of touching control panel
  • Surface acoustic wave type sensing apparatus of touching control panel

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Embodiment Construction

[0028] The present invention is a surface acoustic wave type touch panel sensing device, which will be described in detail below with reference to preferred embodiments in conjunction with the accompanying drawings.

[0029] 2A is a schematic diagram showing the structure of a surface acoustic wave touch panel containing the sensing device of the present invention. As shown in the figure, the touch panel 20 is essentially a rectangular device composed of a horizontal axis and a vertical axis, and has a screen area 21 and a reflection area 22. The sensing device 23 is disposed on the reflection area 22. under. The sensing device 23 includes a first and second horizontal axis transducers 24a and 24b and a first and second vertical axis transducers 25a and 25b, and includes a set of first and second vertical axis reflection units 26a and 26b and a group of first and second horizontal axis reflection units 27a and 27b, wherein the groups of reflection units 26a, 26b, 27a, and 27b stan...

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Abstract

The invention provides a sensing device of an SAW-type (surface acoustic wave) touch panel, which is in novel reflector distribution. The reflector distribution which is different from the conventional distribution that varies from sparse to dense gradually is in the form of being spaced at equal intervals but including a plurality of sub-reflectors, so that when a vibration wave enters a row of reflectors on the relatively rear side, the reflected vibration wave quantity can still be equal to the reflected vibration wave quantity of a vibration wave entering a row of reflectors on the relatively front side, thereby avoiding the problem caused by the distribution form of the widely-known reflector row.

Description

Technical field [0001] The present invention relates to the field of touch panels, and more to a sensing device of a surface acoustic wave (SAW) touch panel in which the reflectors in the reflector row are not arranged in a sparse and dense pattern. Background technique [0002] A surface acoustic wave (SAW) type touch panel is a touch panel that detects the location of a touch input on a touch screen by sensing a vibration wave signal at a destination. It is Use a transducer containing a piezoelectric material to convert an electrical energy signal into the vibration wave signal, and then sense whether the vibration wave signal is blocked by the touch input and cannot be received when it travels on the touch screen The way is it. [0003] FIG. 1A shows a schematic diagram of the structure of a conventional surface acoustic wave touch panel. As shown in FIG. 1A, the touch panel 10 has a screen area 11 and a reflection area 12. The reflection area 12 has a sensing device 13, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/043
Inventor 叶尚泰谢腾为
Owner EGALAX EMPIA TECH INC