CN101976162A

CN101976162A - Monolayer wiring method of capacitive touch screen

Info

Publication number: CN101976162A
Application number: CN 201010252669
Authority: CN
Inventors: 王立民
Original assignee: Suzhou Pixcir Microelectronics Co Ltd
Current assignee: Suzhou Pixcir Microelectronics Co Ltd
Priority date: 2010-08-13
Filing date: 2010-08-13
Publication date: 2011-02-16

Abstract

The invention provides a monolayer wiring method of a capacitive touch screen, which comprises the following steps that the shape of mutually-parallel detection lines is a regular polygon, and at least one internal angle of the polygon is a right angle; and the clearance width between any two adjacent detection lines is the same. The invention has the following advantages that accurate positioning can be realized through monolayer wiring, the process flow of touch screen manufacture is also decreased, and a large quantity of cost is saved.

Description

Capacitance touch screen individual layer wiring method

Technical field

The present invention relates to a kind of capacitance touch screen individual layer wiring method.

Background technology

In recent years, along with the develop rapidly of touch technology, increasing product begins to utilize touch-control system to finish direct control to destination object, thereby has replaced traditional mouse, input equipments such as keyboard, thus saved the space, carry convenient.More common in the market panel computer, touch-control mobile phone etc. have all adopted touch control operation.

In the touch technology field, generally the material that has applied a kind of energy stored charge on the contact panel, this material require possesses the good and higher feature of transparency of electric conductivity simultaneously, as ITO (phosphide tin compound), usually need be on panel applied in two coats, a kind of mode is two-sided bilayer, promptly on the one side of panel, cover two-layer ITO, has insulation course between the wherein two-layer ITO, no matter be which kind of mode, among the two-layer ITO, one deck is the ITO electrode matrix of directions X, one deck is the ITO electrode matrix of Y direction, during operation, just can help to discern touch event by detecting the signal variation that occurs on each electrode.Realize these functions, all need two-layer ITO is fitted in like clockwork on the corresponding panel and could realizes, and when two-layer applying, will inevitably run into the low problem of binding yield, can cause the increase of cost so virtually.

Therefore need a kind of needs one deck badly, and unidirectional ITO connects up on contact panel and just can realize the wiring method of touch-control.

Summary of the invention

At the deficiencies in the prior art, the technical matters that the present invention solves provides and a kind ofly can be used for when projection the system that can utilize shade or high light to control.

For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of capacitance touch screen individual layer wiring method, may further comprise the steps: every the detection line that is parallel to each other be shaped as a regular polygon, it is the right angle that described polygon has an interior angle at least; Gap width between adjacent two detection lines is identical arbitrarily.

Beneficial effect of the present invention is as follows: realized that individual layer wiring can accurately locate, also reduced the technological process of the making of touch-screen, saved a large amount of costs.

Description of drawings

Fig. 1 is the synoptic diagram of the embodiment of the invention;

Fig. 2 is one of partial schematic diagram of the embodiment of the invention;

Fig. 3 be the embodiment of the invention partial schematic diagram two;

Fig. 4 is the system architecture diagram of the embodiment of the invention.

Embodiment

The invention will be further described below in conjunction with drawings and Examples:

See also Fig. 1, touch-screen 10 comprises base plate glass 11, ITO matrix 12.Wherein ITO matrix 2 is plated on base plate glass 101 upsides.Certainly, can also select the corresponding protection film according to environment for use, diaphragm 3 is overlying on the top of ITO matrix 12, shields, thereby widens the purposes of touch-screen 10.

Please consult Fig. 2 simultaneously, at the upper surface of base plate glass 11, can or otherwise be covered with one deck ITO matrix 12 by sputter, plating, this every ITO is a right-angled trapezium.Distance between any two ITO equates, promptly

detection line

121 and 122 spacing d1 equal the spacing d2 of detection line 122 and 123.ITO matrix 12 can optionally adopt laterally or vertically on base plate glass 11 and arrange.When user's finger contacted with touch-screen 10, ITO matrix 12 can detect corresponding capacitive sensing amount according to the contact area of the two.

Fig. 3 is ITO matrix 12 detected touch point synoptic diagram.When user's touch point was A, detection line 121,122 and 123 all can detect the capacitive sensing amount.But because the contact area difference, the induction amount on every detection line can be all unequal.

In addition, because the touch signal source is the user, so need touch signal is screened.With the finger is example, and finger is a sub-elliptical with the surface of contact of touch-screen 10, need do a restriction to touch signal shape.So, can accurately judge the accurate position of touch point.Equally, be example with touch point A.Detection line 121,122,123 can be judged the size of each self-induction amount, is respectively IF1, IF2 and IF3, thereby can judge zone that touch point A is in these three detection lines promptly in the X1-X3 zone, but can't determine its particular location.In actual applications, the area S of touch point A tends to more than or equal to a definite value, set up capacitive sensing flow control one threshold value according to area S, the induction amount that is effective touch signal should be more than or equal to first threshold (first threshold be by User Defined), and should the induction amount be detected by adjacent detection line.Though so above-mentioned three detection lines only can be judged touch point A, the size of dependence IF1, IF2 and IF3 still can be judged the position of touch point A, promptly the function of position of touch point A comprises at least: IF1, IF2, IF3 and S.So can judge the particular location of touch point A.Because the shape of detection line, when touch point A when original position moves to dotted line position, IF1, IF2, IF3 all can produce corresponding variation according to the shape of detection line, and the triangular magnitude relationship of IF1, IF2, IF3 of this moment also can change, thereby can determine the position of touch point A.Said process only is to come for example with three detection lines, is not the attribute that is used to limit detection line.According to said method, the width that needs only the touch point is more than or equal to the length at two ends about the detection line and the distance between the detection line, and promptly L1+L2+d1 just can realize accurately location.

As shown in Figure 4, the electrode of every detection line of touch-screen 10 is linked to each other with touch-control IC, be connected to microprocessor MCU again, can realize touch control operation.In addition, the ultimate principle according to the present invention, the triangle of also shape of detection line can being squared up only need be done respective handling and get final product.

By the present invention, realized the function that the individual layer wiring can accurately be located, also reduced the technological process of the making of touch-screen, saved a large amount of costs.In daily use, the user often uses pointer or finger to touch touch-screen, adapts to different environments for use so can adjust the width of detection line

The above only is a preferable possible embodiments of the present invention, and is non-so promptly limit to claim of the present invention, so the equivalent structure that uses instructions of the present invention and diagramatic content to do such as changes, all in like manner is included in the scope of the present invention.

Claims

1. capacitance touch screen individual layer wiring method may further comprise the steps:

(a) every the detection line that is parallel to each other be shaped as a regular polygon, it is the right angle that described polygon has an interior angle at least;

(b) gap width between adjacent two detection lines is identical arbitrarily.

2. wiring method as claimed in claim 1 is characterized in that, described polygon is right-angled trapezium or right-angle triangle.

3. wiring method as claimed in claim 1 is characterized in that, every detection line is parallel to X-axis or Y-axis.

4. the method for work of a capacitance touch screen, described touch-screen comprise many detection lines that are used for the senses touch signal, and described touch-screen links to each other with microprocessor, and described method comprises:

When the induction amount of described touch signal during, judge whether the distributed areas of described touch signal are on the continuously arranged detection line more than or equal to first threshold;

If constituted by continuously arranged detection line, then with described touch signal as effective touch signal, and, determine the particular location of touch signal according to the relation between the induction amount of corresponding each detection line.

5. method of work as claimed in claim 4 is characterized in that, if the distributed areas of described touch signal are made of the detection line that disperses, then with this touch signal as invalid signals.

6. method of work as claimed in claim 4 is characterized in that described first threshold is by User Defined.

7. method of work as claimed in claim 4 is characterized in that, described continuously arranged detection line comprises at least two detection lines.