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Touch panel

A technology of touch panels and substrates, applied in optics, instruments, electrical digital data processing, etc., can solve problems such as easy and unstable contact, and achieve the effect of preventing distortion

Inactive Publication Date: 2006-03-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the contact of the upper conductive layer 23 and the lower conductive layer 24 tends to become extremely unstable.

Method used

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Experimental program
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Embodiment Construction

[0013] Figure 1A It is a perspective top view of the touch panel according to the embodiment of the present invention, Figure 1B is along Figure 1A Sectional view of line 1B-1B. However, in order to easily determine the structure, the dimensions in the thickness direction are enlarged in the drawings.

[0014] An upper substrate (hereinafter referred to as a substrate) 1 which is a film-like light-transmitting first substrate is made of polyethersulfone or polycarbonate. Further, a lower substrate (hereinafter referred to as a substrate) 2 as a light-transmitting second substrate disposed opposite to the substrate 1 is made of glass, acrylic resin, polycarbonate, or the like. On the lower surface of the substrate 1 (that is, the substrate 2 side), an upper conductive layer (hereinafter referred to as a conductive layer) 3 as a light-transmitting first conductive layer such as indium tin oxide or tin oxide is formed by a sputtering method or the like. A lower conductive ...

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PUM

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Abstract

A touch panel has light-transmissive first and second substrates, a phase plate, a polarizing plate, and a correcting plate. The first substrate is formed with a first conductive layer thereon. The second substrate is provided so as to face the first substrate, and is formed with a second conductive layer thereon on the side near the first substrate, facing the first conductive layer at a given interval. The phase plate is stacked on a surface of the first substrate, opposite to a surface facing the second substrate. The polarizing plate has its heat shrinkage ratio larger than that of the phase plate, and is stacked on the side of the phase plate, opposite to the first substrate. The correcting plate has its heat shrinkage ratio equal to or smaller than that of the phase plate, and is stacked on the side of the polarizing plate, opposite to the phase plate.

Description

technical field [0001] The present invention relates to touch panels used in the operation of various electronic machines Background technique [0002] In recent years, various electronic devices, such as mobile phones and car navigation systems, have been increasing in functionality and diversification. Along with this, there is an increasing number of devices in which a light-transmitting touch panel is mounted on the front of a display element such as a liquid crystal to switch various functions. Therefore, a touch panel with high visibility and reliable operation is required. The user can switch functions by pressing the touch panel with a finger or a pen while confirming the display of the display element on the rear surface through the touch panel. Hereinafter, a conventional touch panel will be described. [0003] image 3 It is a cross-sectional view of a conventional touch panel, and a light-transmitting upper conductive layer 23 such as indium tin oxide is forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K11/06
CPCG06F3/045G02F1/13338
Inventor 田边功二松本贤一藤井彰二
Owner PANASONIC CORP