CN2553431Y

CN2553431Y - Contact screen

Info

Publication number: CN2553431Y
Application number: CN 02271048
Authority: CN
Inventors: 陈弘岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2003-05-28
Anticipated expiration: 2012-06-14

Abstract

The utility model relates to a nontransparent contact screen for the products like the writing pad, etc. And the utility model belongs to the information product technology field. The utility model comprises a PCB plate and a PET film which is covered on the PCB plate. The PET film is jointed with the PCB plate, a layer of electric conduction carbon cement is printed on the contact surface of the PET film and the PCB plate, an electric conduction circuit is etched on the PCB plate of one side of the electric conduction carbon cement; a layer of conducting material is also printed on the contact surface of the PET film and the PCB plate, a fulmargin electric conduction circuit is printed on one side of the conducting material. Because the ITO glass is replaced by the PET film and the small strip-shaped silver circuit arranged on the PCB plate, the thickness of the contact screen is decreased greatly, and the need of super-thin contact screen is met; the silver circuit or copper circuit is able to get steady electric current under a low voltage, the resistance quantity of the electric conduction carbon cement is very even, and compared with the traditional contact screen, the sensitivity, the line shape, the accuracy and the active area of the utility model are improved greatly.

Description

Touch-screen

Technical field:

The utility model relates to the information products technical field, refers in particular to a kind of non-transparency touch-screen that is used as the series products of handwriting pad.

Background technology:

Along with fast development of information technology, the technology of touch-screen is also increasingly mature, at present, touch-screen has been widely used in the concentrated ground of the stream of people such as post office, bank, station, airport, be used to make things convenient for the user to inquire about various information, certainly, except such use, some small-sized touch-screens also can with the supporting use of various computers, the mode that makes the user directly write on handwriting pad with light pen without keyboard can reach the purpose to computer input information or inquiry data, improve work efficiency greatly, promoted the interchange of information.But just present common touch-screen, its structure and performance still exist some incomplete places, for example: because present touch-screen adopts ITO (tin indium oxide) glass to make conductive film, and the thickness of ito glass is bigger, cause the touch-screen overall volume bigger, the needs that are unfavorable for ultra-thinization of touch-screen, in addition, the touch-screen that adopts ito glass to make conductive film also exists such as because the inhomogeneous sensitivity that causes of resistance is low, linearity and accuracy are relatively poor, systematic error is bigger, the shortcoming that useful area is less or the like is brought some unnecessary troubles to the user easily.

Summary of the invention:

The purpose of this utility model is a kind of simple in structure and can overcome the touch-screen of the problems referred to above with regard to being to provide at the deficiencies in the prior art part.

Goal of the invention of the present utility model is achieved in that it comprises: pcb board, also include transparent PET film, the PET film is fitted on the pcb board, the end face online of the pcb board of fitting with the PET film is printed on one deck conduction carbon paste, etching has the conducting wire on the Copper Foil of the pcb board of conduction carbon paste one side, also be printed with layer of conductive material on the end face that PET film and pcb board fit, a side of conductive material then is printed with the elargol conducting wire.

Since the utility model adopts the PET film and on pcb board the mode of wire mark one deck conduction carbon paste replace ito glass, make the thickness of touch-screen greatly reduce, be very beneficial for the needs of ultra-thinization of touch-screen; And the resistance value of conductive carbon film is very even, so its sensitivity, linear and indexs such as accuracy and useful area all are significantly increased than conventional touch screen, can be used as the non-transparency product of handwriting pad and so on.

Description of drawings:

Accompanying drawing 1 is a three-dimensional exploded view of the present utility model

Embodiment:

See shown in the accompanying drawing 1, the utility model includes pcb board 10, also include transparent PET film 20, PET film 20 is fitted on the pcb board 10, the end face online of the pcb board 10 of fitting with PET film 20 is printed on one deck conduction carbon paste 30, etching has the conducting wire on the Copper Foil 11 of the pcb board 10 of conduction carbon paste 30 1 sides, also is printed with layer of conductive material 40 on the end face that PET film 20 and pcb board 10 fit, and a side of conductive material then is printed with the elargol conducting wire; Can add epoxy resin in the described conduction carbon paste 30; The mode that is etched in the also available printing elargol conducting wire, conducting wire on the pcb board 10 replaces; The conductive material 40 that is printed on PET film 20 end faces can be ITO (tin indium oxide) film, also can be the carbon paste film.

When catching, the user touches certain when point on the touch-screen, IC powers to the conducting wire on the pcb board 10, electric current is through the conductive carbon glued membrane 30 on the pcb board 10, pass on the electroconductive ITO film or conductive carbon glued membrane 40 on the PET film 20, pass IC then back, the measurement of electric current is promptly known the information of contact point via IC.

Claims

1. touch-screen, comprise: pcb board (10), it is characterized in that: also include PET film (20), PET film (20) is fitted on the pcb board (10), the end face online of the pcb board (10) of fitting with PET film (20) is printed on one deck conduction carbon paste (30), the Copper Foil (11) of the pcb board (10) of conduction carbon paste (30) one sides is gone up etching the conducting wire, also be printed with layer of conductive material (40) on the end face that PET film (20) and pcb board (10) fit, a side of conductive material (40) then is printed with the elargol conducting wire.

2. touch-screen according to claim 1 is characterized in that: can add epoxy resin in the described conduction carbon paste (30).

3. touch-screen according to claim 1 is characterized in that: the mode that is etched in the also available printing elargol conducting wire, conducting wire on the pcb board (10) replaces.

4. touch-screen according to claim 1 is characterized in that: be printed in PET not the conductive material (40) on (20) end face can be ITO (tin indium oxide) film, also can be the carbon paste film.