CN202189346U

CN202189346U - Single-face interactive capacitance touch screen

Info

Publication number: CN202189346U
Application number: CN2011202424039U
Authority: CN
Inventors: 曹晓星; 李晗
Original assignee: SHENZHEN BAOMING TECHNOLOGY Co Ltd
Current assignee: Huizhou Baoming Seiko Co., Ltd.
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2012-04-11
Anticipated expiration: 2021-07-11

Abstract

The utility model discloses a single-face interactive capacitance touch screen, belonging to the field of an electronic touch screen. The single-face interactive capacitance touch screen comprises a transparent base plate; the upper surface of the transparent base plate is provided with a first bar-shaped electrode module made of conducting material and a second bar-shaped electrode module made of conducting material; the first bar-shaped electrode module is formed by sequentially connecting a plurality of first bar-shaped electrodes by leads; the second bar-shaped electrode module is formed by sequentially connecting a plurality of second bar-shaped electrodes by leads; each bar-shaped electrode is a capacitor cell; and the first bar-shaped electrodes and the second bar-shaped electrodes are independent to each other so as to respectively form a single loop. The single-face interactive capacitance touch screen realizes that the plurality of groups of electrodes of the touch screen can be made on the surface of the same base plate, and is simple in manufacturing method, low in cost and good in touch effect, so that the product touch reliability is greatly improved, graphic distortion is avoided, and the reliability of the capacitance touch screen is greatly improved.

Description

Single face interactive capacitance touch screen

Technical field

The utility model relates to the electronic touch screen field, is specifically related to a kind of single face interactive capacitance touch screen.

Background technology

Along with the development of electronics technology, the keyboard of mobile phone, digital camera, handheld device, vehicle-carrying DVD, MP3, instrument etc. or mouse are touched gradually to shield and substitute at present.The product of touch-screen is not very burning hot several years ago, and Along with people's is more and more for the contact of touch screen product, is also approved that speed of development was accelerated gradually in nearly 2 years by more people.Touch-screen is grown up rapidly, has not only evoked fierce more industry competition, has also promoted technological development indirectly, and the mode of operation of its multi-point touch has risen to a new height to the influence power of touch-screen product especially, is also paid close attention to by people gradually.

Touch-screen is mainly formed by touching detection part and touch screen controller, touches detection part and is installed in the indicator screen front, is used to detect user touch location, send touch screen controller after the reception; And the main effect of touch screen controller is to receive touch information from touch point detection device, and converts it to contact coordinate, gives CPU again, and its can receive simultaneously the order that CPU sends and carry out.

According to the principle of work of touch-screen medium with transmission information; Touch-screen can be divided into four kinds; Be respectively resistance-type, capacitor induction type, infrared-type and surface acoustic wave type, current what be widely used is resistive touch screen, and it utilizes pressure sensitive to carry out resistance control; Resistive touch screen is a kind of laminated film of multilayer, and its major part is a resistance film screen that cooperates very much with display surface.Resistance film screen be with one deck glass or duroplasts flat board as basic unit, the surface scribbles layer of transparent oxidized metal (transparent conductive resistance) ITO (tin indium oxide) conductive layer, is stamped the smooth anti-friction plastic layer of one deck outside surface cure process above again; Its inside surface also scribbles one deck ITO coating; Between them, have the transparent isolating points of many tiny (less than 1/1000 inches) to separate insulation to two conductive layers, when the finger touch screen, two conductive layers has just had contact in the position, touch point; Resistance changes; On X and Y both direction, produce signal, send touch screen controller, controller to detect this contact then and calculate (X; Y) position, the mode according to analog mouse operates again.

The ultimate principle of capacitive touch screen is to utilize the induction by current of human body to carry out work, and capacitive touch screen is two layers of compound glass screen, and the inside surface interlayer of glass screen scribbles ITO (plated film electro-conductive glass); Outermost layer is a skim silicon soil glassivation, and the ITO coating is drawn four electrodes as workplace on four angles; When finger touch was on screen, because people's bulk electric field, user and touch screen surface formed a coupling capacitance; For high-frequency current, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point; This electric current flows out the electrode from four jiaos of touch-screen respectively; And the electric current of these four electrodes of flowing through is directly proportional with the distance of pointing four jiaos, and controller draws touch point position through the accurate Calculation to these four current ratios.

The common limitation of resistance and capacitive touch screen is that the transmittance of touch-screen is not high; The composition of resistance screen generally is that four to six layer multi-layer materials are formed; Make that the highest level that can only reach more than 80% of transmittance of touch-screen, reason are that the air that constitutes between the materials at two layers of resistance screen can the serious transmission that hinders light, in order to obtain better visual effect; Generally be to strengthen backlight and the increase power consumption, thereby need jumbo battery perhaps to shorten the service time of battery; On the other hand; Electric resistance touch screen must rely on ambient pressure to work; What adopt is plastic material and the laminated film of screen is outer, exerts oneself inhomogeneous or uses sharp device to touch possibly to scratch whole touch screen and cause scrapping, and how consumptive material also makes cost of manufacture increase simultaneously.

The utility model content

The purpose of the utility model is to provide a kind of single face interactive capacitance touch screen, adopts two layers of bar shaped conducting film to solve capacitance plate reliability problem of unstable.

For realizing above-mentioned purpose, the technical scheme of the utility model is following:

A kind of single face interactive capacitance touch screen includes transparency carrier, and the upper surface of said transparency carrier is provided with by conductive material and processes the first bar shaped electrode module, and the upper surface of transparency carrier is provided with by conductive material and processes the second bar shaped electrode module; The described first bar shaped electrode module is the module that a plurality of first strip electrodes that connect successively through lead are formed, and the described second bar shaped electrode module is the module that a plurality of second strip electrodes that connect successively through lead are formed; Described first strip electrode and second strip electrode are separate, the independent loop of each self-forming; Each strip electrode is a capacitor cell; The first bar shaped electrode module is through the conducting bridge conducting.

Preferably: the described first bar shaped electrode module and the second bar shaped module are in same one deck, and electrode is separate, and thickness of electrode is identical; The described first bar shaped electrode module is spatially vertical each other with the described second bar shaped electrode module.

More excellent is: be provided with suspension cube electrode module in the middle of the described first bar shaped electrode module and the second bar shaped module, suspension cube electrode module is made up of some rectangles or square electrode, and is separate between each suspension cube electrode module

The principle of work of single face interactive capacitance touch screen is:

There is the fixing electric capacity of a value to exist between adjacent two strip electrodes; Controller produces a specific oscillation frequency at every lead; When touching on the screen, can cause the capacitance variation of system, thereby make the oscillation frequency around the touch point change with energized conductor or finger; Controller can calculate the capacitance after the variation, and this capacitance is scaled the relative X/Y coordinate on the screen.

The beneficial effect of the utility model:

The utility model can realize that the multi-group electrode with touch-screen is made in the surface of same plate base, and method for making is simple, and cost is low, and it is good to touch effect, and product touches reliability and significantly promotes, and has avoided aliasing, has improved the capacitive touch screen reliability greatly.

Description of drawings

Fig. 1 is the described single face interactive of a utility model capacitance touch screen structural representation;

Fig. 2 is the structure for amplifying synoptic diagram of the described first bar shaped electrode module of the utility model;

Fig. 3 is the structure for amplifying synoptic diagram of the described second bar shaped electrode module of the utility model;

Fig. 4 is the structure for amplifying synoptic diagram of the described suspension cube electrode of the utility model module;

Fig. 5 is a communications zone structure for amplifying synoptic diagram between the said single face interactive of the utility model capacitance touch panel module.

Embodiment

Below in conjunction with instructions and accompanying drawing the utility model is done further explain.

Shown in Figure 1 is the described single face interactive of present embodiment capacitance touch screen structural representation, and Fig. 2-4 is respectively the structure for amplifying synoptic diagram of described first strip electrode of insured amount embodiment, module 2, the second bar shaped electrode module 3 and suspension cube electrode module 4.

The described single face interactive of present embodiment capacitance touch screen includes transparency carrier 1; The upper surface of transparency carrier 1 is provided with by the ITO conducting film and processes first strip electrode (horizontal direction) module 2, and the upper surface of transparency carrier 1 is provided with by the ITO conducting film and processes second strip electrode (vertical direction) module 3; The first bar shaped electrode module 2 is modules that a plurality of first strip electrodes that connect successively through lead are formed, and the second bar shaped electrode module 3 is modules that a plurality of second strip electrodes that connect successively through lead are formed; Each strip electrode is a capacitor cell.First strip electrode and second strip electrode are provided with the suspension cube electrode module 4 that the ITO conducting film is processed by the centre, and the suspension cube electrode module 4 and first strip electrode (horizontal direction) module 2 and second strip electrode (vertical direction) module 3 are separate.

The first bar shaped electrode module 2 is spatially perpendicular with the second bar shaped electrode module 3.

Be made up of the suspension cube electrode in the middle of the first bar shaped electrode module and the second bar shaped module, the suspension cube electrode is made up of some rectangles or square electrode, and is separate between each suspension piece.

Shown in Figure 5 is communications zone structure for amplifying synoptic diagram between the said single face interactive of the present embodiment capacitance touch panel module, and the first bar shaped electrode module 2 is through conducting bridge 5 conductings; The second bar shaped electrode module 3 is directly conducting in the horizontal direction; The suspension cube electrode module 4 and first strip electrode (horizontal direction) module 2 and second strip electrode (vertical direction) module 3 are separate.

Transparency carrier 1 is a tempered glass; First, second

strip electrode module

2,3 and suspension cube electrode module 4 are ITO conducting films; The making of first, second

strip electrode module

2,3 and suspension cube electrode module 4 is that the method for passing through the vacuum magnetic control sputter earlier deposits one deck ito thin film on transparency carrier 1; Obtain transparent ITO conducting film, through exposure, development, etching method nesa coating is handled again, finally obtain first, second

strip electrode module

2,3 and suspension cube electrode module 4.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.

Claims

1. single face interactive capacitance touch screen; Include transparency carrier; It is characterized in that: the upper surface of said transparency carrier is provided with by conductive material and processes the first bar shaped electrode module, and the upper surface of transparency carrier is provided with by conductive material and processes the second bar shaped electrode module; The described first bar shaped electrode module is the module that a plurality of first strip electrodes that connect successively through lead are formed, and the described second bar shaped electrode module is the module that a plurality of second strip electrodes that connect successively through lead are formed; Each strip electrode is a capacitor cell; Described first strip electrode and second strip electrode are separate, the independent loop of each self-forming; The first bar shaped electrode module is through the conducting bridge conducting.

2. single face interactive capacitance touch screen according to claim 1 is characterized in that: the described first bar shaped electrode module and the second bar shaped module are in same one deck, and electrode is separate, and thickness of electrode is identical; The described first bar shaped electrode module is spatially vertical each other with the described second bar shaped electrode module.

3. single face interactive capacitance touch screen according to claim 2; It is characterized in that: be provided with suspension cube electrode module in the middle of the described first bar shaped electrode module and the second bar shaped module; Suspension cube electrode module is made up of some rectangles or square electrode, and is separate between each suspension cube electrode module.