CN201741138U

CN201741138U - Elliptic bridging type capacitive touch screen

Info

Publication number: CN201741138U
Application number: CN2010201277339U
Authority: CN
Inventors: 李晗; 李军; 赵之光; 汪国忠
Original assignee: Shenzhen Baoming Seiko Co ltd
Current assignee: SHENZHEN BAOMING TECHNOLOGY Co Ltd
Priority date: 2010-03-10
Filing date: 2010-03-10
Publication date: 2011-02-09
Anticipated expiration: 2020-03-10

Abstract

The utility model discloses an elliptic bridging type capacitive touch screen comprising a transparent substrate, wherein a first elliptic electrode array and a second elliptic electrode array which are made of a conductive material and are mutually insulated are arranged on the transparent substrate, the first elliptic electrode array is an array formed by arranging a plurality of first elliptic electrodes or first elliptic electrode modules which are sequentially connected by conducting wires, the second electrode array is an array formed by arranging a plurality of second elliptic electrodes or second elliptic electrode modules which are sequentially connected by conducting wires, and the second elliptic electrodes or the second elliptic electrode modules are positioned in clearances between the first elliptic electrodes or the first elliptic electrode modules; the first elliptic electrode modules and the second elliptic electrode modules are respectively in an elliptic structure formed by a plurality of elliptic electrodes; and each elliptic electrode forms a capacitive unit. The utility model has simple manufacturing method, low cost and little possibility of damage, avoids the distortion of figures and enhances the electric conductivity, the light transmittance and the reliability of a capacitive type touch screen greatly.

Description

Oval bridging type capacitance touch-screen

Technical field

The utility model relates to the electronic touch screen field, is specifically related to a kind of oval bridging type capacitance touch-screen.

Background technology

Development along with electronics technology, present mobile phone, digital camera, handheld device, vehicle-carrying DVD, MP3, the keyboard of instrument etc. or mouse are touched gradually to shield and substitute, the product of touch-screen is not very burning hot several years ago, and along with people are more and more for the contact of touch screen product, also approved in nearly 2 years by more people, speed of development is accelerated gradually, touch-screen is grown up rapidly, not only evoked fierce more industry competition, also promoted the development of technology indirectly, 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, 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, has the transparent isolating points of many tiny (less than 1/1000 inches) that two conductive layers is separated insulation between them; When the finger touch screen, two conductive layers has just had contact in the position, touch point, and 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 main limitation of electric resistance touch screen is that the composition that shields generally is that four to six layer multi-layer materials are formed, make that the transmittance of touch-screen is not high, the highest level that can only reach more than 80%, reason are that the air that constitutes between the two layers of material of resistance screen can the serious transmission that hinders light.,, generally be to strengthen backlight and the increase power consumption, thereby need the service time of jumbo battery or shortening battery in order to obtain better visual effect; 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 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 one deck 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.

Therefore capacitive touch screen and traditional resistive touch screen have very big difference, resistance type touch control screen can only be judged a touch point at every turn when work, if touch point is more than two, just right judgement can not have been made, so resistive touch screen is only applicable to click, pull the judgement that waits some simple motions, and the multi-point touch of capacitive touch screen, then user's touch can be decomposed into and gather multi-point signal and judge two work of significance signal, finish judgement to compound action, the touch-control of capacitive touch screen does not need pressure, promptly do not need mechanical motion just can work, also just not wearing and tearing, so be unlimited serviceable life in theory, do not have the air gap between the two-layer ito thin film simultaneously, make the transmittance of touch-screen all near 90%.

The utility model content

The technical problems to be solved in the utility model provides a kind of oval bridging type capacitance touch-screen, adopts oval connecting line bridging mode to solve the big problem of resistance of electric capacity square tie point.

The technical solution of the utility model is as follows:

A kind of oval bridging type capacitance touch-screen, include transparency carrier, it is characterized in that: described transparency carrier be provided with make by conductive material and each other the insulation first, two oval-shaped electrode arrays, the described first oval-shaped electrode array is the array that a plurality of first oval-shaped electrodes that connect successively by lead or the first oval-shaped electrode module are lined up, second electrod-array is the array that a plurality of second oval-shaped electrodes that connect successively by lead or the second oval-shaped electrode module are lined up, in described second oval-shaped electrode or the second oval-shaped electrode module gap between first oval-shaped electrode or the first oval-shaped electrode module; The described first oval-shaped electrode module, the second oval-shaped electrode module are respectively the ellipsoidal structures that is made of a plurality of oval-shaped electrodes; Described each oval-shaped electrode constitutes a capacitor cell.

Be connected the mutual cross arrangement of lead in connection lead in the described first oval-shaped electrode array between the adjacent first oval or first oval module and the second oval-shaped electrode array between adjacent second ellipse or the second oval module, and first ellipse or the first oval module and second ellipse or the second oval module are presented down two-layer arranged distribution, and there is insulating material isolated first oval or the first oval module and second oval or second ellipse in the middle layer.

Described high light-transmission type capacitance touch screen, it is characterized in that: described first, second oval-shaped electrode array is to being deposited on the transparent film of leading on the transparency carrier by exposure, development, etching, forming first, second oval-shaped electrode or first, second oval-shaped electrode module.

The principle of work of oval bridging type capacitance touch-screen is:

There is the fixing electric capacity of a value to exist between adjacent two mesh 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 be realized the multi-group electrode of touch-screen is made on the same plane of same plate base, and method for making is simple, and cost is low, and easy damaged has not been avoided aliasing, has improved electric conductivity, light transmission and the reliability of capacitive touch screen greatly.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is horizontal oval transparency electrode face synoptic diagram.

Fig. 3 is vertical oval transparency electrode face synoptic diagram.

Fig. 4 the utility model regional area enlarged diagram.

Fig. 5 is the utility model sectional view.

Embodiment

Referring to Fig. 1,2,3,4,5, a kind of oval bridging type capacitance touch-screen, include transparency carrier 1, transparency carrier be provided with make by conductive material and each other the insulation first, two oval-

shaped electrode arrays

2,3, the first oval-shaped electrode array 2 is arrays that a plurality of first oval-shaped electrodes that connect successively by lead or the first oval-shaped electrode module are lined up, second electrod-array 3 is arrays that a plurality of second oval-shaped electrodes that connect successively by lead or the second oval-shaped electrode module are lined up, in second oval-shaped electrode or the second oval-shaped electrode module gap between first oval-shaped electrode or the first oval-shaped electrode module; The first oval-shaped electrode module, the second oval-shaped electrode module are respectively the reticulate textures that is made of a plurality of oval-shaped electrodes; Each oval-shaped electrode constitutes a capacitor cell.

Be connected the mutual cross arrangement of lead in connection lead in the first oval-shaped electrode array between the adjacent first oval or first oval module and the second oval-shaped electrode array between adjacent second ellipse or the second oval module, and first ellipse or the first oval module and second ellipse or the second oval module are presented down two-layer arranged distribution, and there is insulating material isolated first oval or the first oval module and second oval or second ellipse in the middle layer.

Transparency carrier 1 is a tempered glass, first and second oval-shaped electrode array the 2, the 3rd, transparent ITO conducting film, the making of first and second oval-

shaped electrode array

2,3 is that first method by vapour deposition deposits one deck ito thin film on transparency carrier, obtain transparent ITO conducting film, by exposure, development, etching method nesa coating is handled again, obtained first and second oval

transparency electrode array

2,3.

Claims

1. oval bridging type capacitance touch-screen, include transparency carrier, it is characterized in that: described transparency carrier be provided with make by conductive material and each other the insulation first, two oval-shaped electrode arrays, the described first oval-shaped electrode array is the array that a plurality of first oval-shaped electrodes that connect successively by lead or the first oval-shaped electrode module are lined up, second electrod-array is the array that a plurality of second oval-shaped electrodes that connect successively by lead or the second oval-shaped electrode module are lined up, in described second oval-shaped electrode or the second oval-shaped electrode module gap between first oval-shaped electrode or the first oval-shaped electrode module; The described first oval-shaped electrode module, the second oval-shaped electrode module are respectively the ellipsoidal structures that is made of a plurality of oval-shaped electrodes; Described each oval-shaped electrode constitutes a capacitor cell.

2. oval bridging type capacitance touch-screen according to claim 1, it is characterized in that: be connected the mutual cross arrangement of lead in the connection lead in the described first oval-shaped electrode array between the adjacent first oval or first oval module and the second oval-shaped electrode array between adjacent second ellipse or the second oval module, and first ellipse or the first oval module and second ellipse or the second oval module are presented down two-layer arranged distribution, and there is insulating material isolated first oval or the first oval module and the second oval or second oval module in the middle layer.