CN2553430Y

CN2553430Y - Contact screen

Info

Publication number: CN2553430Y
Application number: CN 02271046
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. A copper foil strip is etched into a plurality of small strips which are arranged on the front face of the PCB plate, and the PCB plate is covered with PET film, an electric conduction carbon cement film which connects the copper foil strips together is arranged on the two ends of the copper foil strip; a plurality of small strip-shaped silver adhesive strips which are vertical with the copper foil strips are printed on the contact surface of the PET film and the PCB plate, the two ends of the printed silver adhesive strips are connected through the electric conduction carbon cement film. 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 constriction resistance quantity is small, 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

A kind of 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 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 the ITO(tin indium oxide) glass is made 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 because inhomogeneous cause low such as sensitivity of resistance, 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 includes: pcb board and the PET film that is attached on the pcb board, the end face that attaches the pcb board of PET film is provided with the copper chaff that is etched into the multirow fine strip shape, the both sides of copper chaff are provided with the conductive carbon glued membrane that copper chaff is coupled together, be printed with the multiple row elongated strip elargol bar vertical with copper chaff on PET film and the one side that pcb board contacts, the two ends of printed silver adhesive tape connect by the conductive carbon glued membrane.

Be arranged on the pcb board, be etched into the also available printed silver adhesive tape of the Copper Foil of fine strip shape and replace.

Be printed on the PET film the elargol bar also the mode of useful etch FPC replace.

Can add epoxy resin in the conductive carbon glued membrane or thereby elargol is adjusted its resistance value.

Since the utility model adopts the PET film and on pcb board the silver/copper wire of the elongated strip of printing replace ito glass, make the thickness of touch-screen greatly reduce, be very beneficial for the needs of ultra-thinization of touch-screen; And silver/copper wire can obtain highly stable electric current under very little pressure, and contact resistance value is very little, and indexs such as its sensitivity, linearity and accuracy and useful area all are significantly increased than conventional touch screen.

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, and attaching PET film 20 thereon, the end face that attaches the pcb board 10 of PET film 20 is provided with the copper chaff 30 that is etched into the multirow fine strip shape, the width of copper chaff 30 is 0.2～0.5mm, also be 0.2～0.5mm at interval, the both sides of copper chaff 30 are provided with the conductive carbon glued membrane 40 that will have copper chaff 31 to couple together, the width of conductive carbon glued membrane 40 is about 2～5mm, be printed with the vertical elongated strip elargol bar 50 of multiple row and copper case bar 30 on PET film 20 and the one side that pcb board contacts, the two ends of printed silver adhesive tape 50 connect by conductive carbon glued membrane 60; Be arranged on the pcb board 10, be etched into the also available printed silver adhesive tape of the copper chaff 30 of fine strip shape and replace; Be printed on the PET film 20 elargol bar 50 also the mode of useful etch FPC replace.

Its principle of work is: when the user touches certain position on the PET film 20 (P point as shown in FIG.), IC supplies with the electric current of C1 and C2 respectively to the conductive carbon glued membrane 60 at PET film 20 two ends, and the electric current of C1 and C2 is through the conductive carbon glued membrane 60 of X1 and X2 length and pass that elongated strip silver/conductive copper wire road reaches the P point on the PET film 20.Afterwards, after gathering, C1 and C2 electric current turn on the pcb board 10, be divided into two strands of electric currents of C3 and C4, two strands of electric currents of C3 and C4 are again via the copper/silver-colored conducting wire of elongated strip, conductive carbon glued membrane through Y1 and Y2 length returns IC, IC is by measuring the information that C1, C2, C3 and C4 promptly know X1, X2, Y1, Y2, the information of user touch point just, thus export accordingly.

Claims

1. touch-screen, comprise: pcb board (10), it is characterized in that: also include the PET film (20) that is attached on the pcb board (10), the end face that attaches the pcb board (10) of PET film (20) is provided with the copper chaff (30) that is etched into the multirow fine strip shape, the two ends of copper chaff (30) are provided with the conductive carbon glued membrane (40) that will have copper chaff (30) to couple together, be printed with the multiple row elongated strip elargol bar (50) vertical with copper chaff (30) on PET film (20) and the one side that pcb board contacts, the two ends of printed silver adhesive tape (50) connect by conductive carbon glued membrane (60).

2. a kind of touch-screen according to claim 1 is characterized in that: be arranged on the also available printed silver adhesive tape replacement of copper chaff (30) that fine strip shape was gone up, was etched into to pcb board (10).

3. a kind of touch-screen according to claim 1 is characterized in that: be printed on the PET film (20) elargol bar (50) also the mode of useful etch FPC replace.

4. a kind of touch-screen according to claim 1 is characterized in that: conductive carbon glued membrane (40) and (60) thus in can add epoxy resin or elargol is adjusted its resistance value.