Touch panel and liquid crystal display apparatus using the same

A technology of liquid crystal display device and touch panel, which is applied in the directions of identification device, assembling printed circuit with electrical components, input/output of user/computer interaction, etc. question

Inactive Publication Date: 2005-05-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, in the case of the above-mentioned configuration, there is a problem that the area outside the visible area boundary 6 of the touch panel, that is, the area of ​​the frame edge increases, making it difficult to reduce the size and weight of the device on which the touch panel is mounted. stand up
However, regardless of the configuration, on the other hand, the influence on the thermocompression bonding part of the FPC can be reduced, and there is also a problem of design restrictions in the generation of wiring routing, or a problem of increased cost.

Method used

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  • Touch panel and liquid crystal display apparatus using the same
  • Touch panel and liquid crystal display apparatus using the same
  • Touch panel and liquid crystal display apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] figure 1 , figure 2 It is an explanatory diagram illustrating touch panel 101 according to Embodiment 1 of the present invention.

[0055] The touch panel 101 has a first transparent substrate 31 made of soda lime glass and processed into a substantially rectangular shape, and a flexible operating side made of a biaxially stretched polyethylene terephthalate film with a thickness of 188 μm. The second transparent substrate 32 and a flexible wiring board (hereinafter referred to as FPC) 45 .

[0056] On the upper surface side of the first transparent substrate 31, a first transparent conductive film 33 made of indium tin oxide (hereinafter referred to as ITO) is formed on the entire surface. On the first transparent conductive film 33 inside, minute-sized dot pads 35 made of insulating epoxy resin or the like are provided at predetermined pitches.

[0057] The second transparent substrate 32 has a second transparent conductive film 34 made of ITO formed on the entir...

Embodiment approach 2

[0095] Figure 3 to Figure 5 This is an example for explaining the touch panel according to Embodiment 2 of the present invention. In addition, the same code|symbol is attached|subjected to the part of the same structure as Embodiment 1, and the description is abbreviate|omitted.

[0096] Touch panel 103 according to Embodiment 2 has first transparent substrate 31 on which first transparent conductive film 33 is formed, second transparent substrate 32 on which second transparent conductive film 34 is formed, and FPC 52 .

[0097] Both the first transparent substrate 31 and the second transparent substrate 32 are made of polycarbonate film, the first transparent substrate 31 has an overhang 31A, and the second transparent substrate 32 has an overhang 32A. In order to obtain optical isotropy, polycarbonate films can be produced by casting.

[0098] In addition, as the FPC 52, a double-sided wiring type FPC having wiring patterns 53 and 54 on each of the upper and lower sides o...

Embodiment approach 3

[0124] Using Embodiment 3, a liquid crystal display device with a touch panel (hereinafter referred to as TTP-LCD) 106 in which the touch panel 61 described in Embodiment 1 is mounted on a liquid crystal display element will be described. In addition, the same code|symbol is attached|subjected to the part of the same structure as Embodiment 1, and the description is abbreviate|omitted.

[0125] Image 6 , Figure 7 It is an explanatory diagram illustrating TTP-LCD 106 according to Embodiment 3 of the present invention, and touch panel 61 is arranged on the display screen of liquid crystal display element 62 .

[0126] In addition, the liquid crystal display element 62 is composed of an upper substrate 63, a lower substrate 64, a liquid crystal layer 65, a sealing layer 66, an upper polarizing plate 67, a lower polarizing plate 68, a light guide plate 69, a backlight 70, and a housing base 71.

[0127] In addition, in Image 6 Among other components contained in the liquid c...

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Abstract

The present invention provides a touch panel, which is constituted by providing a protruding part (32A) on a second transparent substrate (32), bonding a flexible wiring board (45) to the protruding part (32A) by thermocompression, and In the parts other than the part (32A), the size and weight of the equipment to be mounted are realized by narrowing the width of the frame edge. In addition, by sticking a sheet-like member such as a polarizing plate (50) to the upper surface portion of the second transparent substrate (32) except the area of ​​the protruding portion (32A), the action from the sheet-like member to the FPC (52) is alleviated. Stress on the bonded portion is applied to improve the electrical connection stability of the FPC (52).

Description

technical field [0001] The present invention relates to a touch panel mounted on the display surface side of a liquid crystal display device, etc., which can input a predetermined signal by pressing operation with a pen or a finger corresponding to the content to be displayed, and a liquid crystal display device with a touch panel using the same . technical background [0002] In recent years, among portable devices and electronic devices requiring selection of menus, there has been an increasing number of devices using touch panels that can input predetermined signals by pressing operations with a pen or a finger corresponding to the content to be displayed. [0003] There are several types of touch panels in this touch panel, and as disclosed in JP 2002-132449 A, a touch panel of a resistive film analog type most used by people will be described with reference to figures. [0004] In addition, in the drawing, in order to facilitate understanding of the structure, the dime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/133G02F1/1335G06F3/03G06F3/041G06F3/045G06K11/06G09F9/00G09G5/00H01H9/02H01H13/70H01H13/712H05K3/36
CPCG06F3/0412H05K3/361G06F2203/04103G06F3/045G06F3/04164
Inventor 中西朗藤井树之
Owner PANASONIC CORP
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