CN201837985U

CN201837985U - Dual-sided straight strip-shaped capacitive touch screen

Info

Publication number: CN201837985U
Application number: CN2010205434875U
Authority: CN
Inventors: 李晗; 李军; 赵之光; 汪国忠
Original assignee: Shenzhen Baoming Seiko Co ltd
Current assignee: HUIZHOU BAOMING SEIKO Co Ltd
Priority date: 2010-09-26
Filing date: 2010-09-26
Publication date: 2011-05-18
Anticipated expiration: 2020-09-26

Abstract

The utility model discloses a dual-sized straight strip-shaped capacitive touch screen which comprises a transparent substrate. A first strip-shaped electrode module made of conducting materials is arranged on the upper surface of the transparent substrate, and a second strip-shaped electrode module also made of conducting materials is arranged on the lower surface of the transparent substrate; the first strip-shaped electrode module is composed of a plurality of first strip-shaped electrodes which are sequentially connected by a wire, and the second strip-shaped electrode module is composed of a plurality of second strip-shaped electrodes which are sequentially connected by the wire; and each strip-shaped electrode is a capacitive unit. The dual-sided straight strip-shaped capacitive touch screen can realize that groups of electrodes of the touch screen can be arranged on the upper and lower surfaces of the same substrate; moreover, the dual-sided straight strip-shaped capacitive touch screen adopts simple manufacturing method, requires low cost and cannot be easily damaged; in addition, graphic distortion is avoided and the reliability of the capacitive touch screen is greatly improved.

Description

Two-sided vertical bar shaped capacitance touch screen

Technical field

The utility model relates to the electronic touch screen field, is specifically related to a kind of two-sided vertical bar shaped 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 more and more for the contact of touch screen product along with people, is approved that speed of development was accelerated gradually in nearly 2 years by more people yet.Touch-screen is grown up rapidly, has not only evoked fierce more industry competition, has also promoted the development of technology 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 be carried out.

Medium according to the principle of work of touch-screen and 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 touch-screen is widely used to be 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 is as basic unit with one deck glass or duroplasts flat board, the surface scribbles layer of transparent oxidized metal (transparent conductive resistance) ITO (tin indium oxide) conductive layer, be 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, there is the transparent isolating points of many tiny (less than 1/1000 inches) that two conductive layers is separated insulation, 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 then, controller detects this contact and calculates (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; capacitive touch screen is two layers of compound glass screen; the inside surface interlayer of glass screen scribbles ITO (plated film electro-conductive glass); outermost layer is a skim silicon soil glassivation; the ITO coating is as workplace; draw four electrodes on four angles; when finger touch is on screen; because people's bulk electric field; user and touch screen surface form 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 by 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 the highest level that can only reach more than 80% of transmittance of touch-screen, reason is that the air that constitutes between the two layers of material 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 the service time of jumbo battery or shortening 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 may to scratch whole touch screen and cause scrapping, and how consumptive material also makes cost of manufacture increase simultaneously.The touch-control of capacitive touch screen does not need pressure, does not promptly need mechanical motion just can work, also just not wearing and tearing, so in theory serviceable life be unlimited, do not have the air gap between the two-layer ito thin film simultaneously, the transmittance of touch-screen is near 90%.

The utility model content

The technical problems to be solved in the utility model provides a kind of two-sided vertical bar shaped capacitance touch screen, adopts two layers of bar shaped conducting film to solve the capacitance plate reliability problems.

The technical solution of the utility model is as follows:

A kind of two-sided vertical bar shaped capacitance touch screen includes transparency carrier, it is characterized in that: the upper surface of described transparency carrier is provided with by conductive material and makes the first bar shaped electrode module, and the lower surface of transparency carrier is provided with by conductive material and makes 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 by lead are formed, and the described second bar shaped electrode module is the module that a plurality of second strip electrodes that connect successively by lead are formed; Each strip electrode is a capacitor cell.

Described two-sided vertical bar shaped capacitance touch screen is characterized in that: the described first bar shaped electrode module is spatially perpendicular with the described second bar shaped electrode module.

The principle of work of two-sided vertical bar shaped 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 with energized conductor or finger, can cause the capacitance variation of system, thereby make the oscillation frequency around the touch point change, controller can calculate the capacitance after the variation, and this capacitance is scaled relative X/Y coordinate on the screen.

The beneficial effects of the utility model:

The utility model can realize that the multi-group electrode with touch-screen is made in the upper and lower surface of same plate base, and method for making is simple, and cost is low, and easy damaged has not been avoided aliasing, has improved the capacitive touch screen reliability greatly.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the structural representation of the first bar shaped electrode module.

Fig. 3 is the structural representation of the second bar shaped electrode module.

Fig. 4 the utility model regional area enlarged diagram.

Fig. 5 is a sectional view of the present utility model.

Embodiment

Referring to Fig. 1,2,3,4,5, a kind of two-sided vertical bar shaped capacitance touch screen, include transparency carrier 1, the upper surface of transparency carrier 1 is provided with by conductive material and makes first strip electrode (horizontal direction) module 2, and the lower surface of transparency carrier 1 is provided with by conductive material and makes 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 by lead are formed, and the second bar shaped electrode module 3 is modules that a plurality of second strip electrodes that connect successively by lead are formed; Each strip electrode is a capacitor cell.

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

Transparency carrier 1 is a tempered glass, first, second strip electrode module the 2, the 3rd, the ITO conducting film, the making of first, second strip electrode module 2,3 is that first method by vapour deposition deposits one deck ito thin film on transparency carrier 1, obtain transparent ITO conducting film, by exposure, development, etching method nesa coating is handled again, finally obtained first, second strip electrode module 2,3.

Claims

1. two-sided vertical bar shaped capacitance touch screen, include transparency carrier, it is characterized in that: the upper surface of described transparency carrier is provided with by conductive material and makes the first bar shaped electrode module, and the lower surface of transparency carrier is provided with by conductive material and makes 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 by lead are formed, and the described second bar shaped electrode module is the module that a plurality of second strip electrodes that connect successively by lead are formed; Each strip electrode is a capacitor cell.

2. two-sided vertical bar shaped capacitance touch screen according to claim 1 is characterized in that: the described first bar shaped electrode module is spatially perpendicular with the described second bar shaped electrode module.