CN202711217U

CN202711217U - Capacitive touch sensor, touch detector and touch terminal

Info

Publication number: CN202711217U
Application number: CN 201220281078
Authority: CN
Inventors: 冉锐; 刘武
Original assignee: Shenzhen Huiding Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2012-06-08
Filing date: 2012-06-08
Publication date: 2013-01-30
Anticipated expiration: 2022-06-08

Abstract

The utility model belongs to the technical field of touch sensors and provides a capacitive touch sensor. The sensor comprises a driving electrode layer distributed with a driving electrode pattern and a sensing electrode layer distributed with a sensing electrode pattern, and at least the inside of the driving electrode pattern is hollow. The area of the electrodes is reduced due to the designed electrode patterns, electric field distribution of the electrodes of a touch screen/board is improved from the principle, the touch sensitivity is improved, and a vertical distance smaller than 0.7mm between the electrode pattern and the surface of the touch screen/board can be supported. The utility model further discloses a touch detector and a touch terminal.

Description

Capacitive touch sensors, touch detecting apparatus and touch control terminal

Technical field

The utility model belongs to the touch sensor technologies field, relates in particular to a kind of capacitive touch sensors, touch detecting apparatus and touch control terminal.

Background technology

Traditional capacitive touch screen/board electrode pattern scheme has thickness requirement to the folded result of touch-screen/flaggy, electrode pattern apart from touch-screen/plate Surface Vertical distance less than the obvious variation of 0.7＜mm performance.Touch sensitivity can occur and reduce, None-identified touch point, touch point are by situations such as mistake cutting, poor linearity.The existence of the problems referred to above has restricted the lightening trend of touch-type handheld device to a certain extent.

The utility model content

First technical matters to be solved in the utility model is to provide a kind of capacitive touch sensors, is intended to make electrode pattern still to satisfy normal request for utilization apart from touch-screen/plate Surface Vertical distance less than 0.7＜mm performance.

The utility model is to realize like this, a kind of capacitive touch sensors, comprise the drive electrode layer that is laid with the drive electrode pattern and the induction electrode layer that is laid with the induction electrode pattern, in described drive electrode pattern and the described induction electrode pattern, described at least drive electrode pattern inside hollows out.

Further, described hollowing out as grid type hollows out, the cut-out of each pattern unit has 2 grids at least.

Further, described cut-out is laid with one or more filling blocks.

Further, the cut-out area accounts for 5%～95% of the drive electrode pattern total area on the described drive electrode pattern, and the cut-out area accounts for 5%～95% of the induction electrode pattern total area on the described induction electrode pattern.

Further, described drive electrode layer and described induction electrode layer are positioned on the same substrate or on the different substrate, vertical range between the two is in 0mm～1.5mm scope.

Further, the horizontal range between described drive electrode layer and the described induction electrode layer is 0.01mm～1mm.

Further, described drive electrode layer and described induction electrode layer are located on the substrate of glass or PET or PMMA or PCB material.

Further, the thickness of described substrate is in 0.02mm～2mm scope.

Second technical matters to be solved in the utility model also provides a kind of touch detecting apparatus, comprise capacitive touch sensors, with the touch controller that described capacitive touch sensors is connected, described capacitive touch sensors is aforesaid capacitive touch sensors.

The 3rd technical matters to be solved in the utility model also provides a kind of touch control terminal, comprises as mentioned above a touch detecting apparatus.

The electrode design pattern that the utility model provides has reduced electrode area, has improved the Electric Field Distribution of touch-screen/plate electrode from principle, has improved touch sensitivity, can the supporting electrode pattern apart from the application of touch-screen/plate Surface Vertical distance less than 0.7＜mm.

Description of drawings

Fig. 1 is the structure of the capacitive touch sensors of the bilayer that provides of the utility model;

Fig. 2 is the circuit model of capacitive touch sensors shown in Figure 1 when not having touch operation;

Fig. 3 is the circuit model when on the capacitive touch sensors shown in Figure 1 touch operation being arranged;

Fig. 4, Fig. 5, Fig. 6 are the drive electrode layer of capacitive touch sensors of the individual layer that provides of the utility model and the shape schematic diagram of induction electrode layer.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

The utility model is with respect to tradition design, by the electrode pattern area that reduces improve touch-screen/plate electrode Electric Field Distribution, can support pattern apart from the application of touch-screen/plate Surface Vertical distance less than 0.7＜mm.

Fig. 1 shows the structure of capacitive touch sensors as an example of the two-layer equation touch sensor example, touch panel 11, induction electrode layer 12, dielectric isolation layer 13, drive electrode layer 14 and substrate 15 from top to bottom successively, wherein touch panel 11 can adopt tempered glass, acrylic or PVC class material, and electric field line EL points to induction electrode layer 12 by drive electrode layer 14.Fig. 2 is the circuit model of capacitive touch sensors shown in Figure 1 when not having touch operation, V1 analog drive signal source wherein, the intrinsic capacity of C1, C1x touch-screen individual node, the electric field of this electric capacity is open, can be sucked away the part electric field along with the Touch of finger, C1 represents the part that this electric capacity can not change, and C1x represents that open electric field causes can reformed electric capacity.Fig. 3 is the circuit model when on the capacitive touch sensors shown in Figure 1 touch operation being arranged, when C2 is finger touch, coupling capacitance between finger and the drive wire, when C3 is finger touch, coupling capacitance between finger and the line of induction, Ch be human body to the coupling capacitance between the touch-screen system ground, the size of coupling capacitor C2 and C3 can produce certain influence to the performance of touch-screen.For any mutual capacitance detection scheme, its basic circuit model is all identical, and difference is electric capacity ratio or the value in the circuit model.

Based on the foregoing circuit modular concept, in the utility model, capacitive touch sensors comprises the drive electrode layer that is laid with the drive electrode pattern and is laid with the induction electrode layer of induction electrode pattern, in described drive electrode pattern and the described induction electrode pattern, described at least drive electrode pattern inside hollows out.

When touch was arranged, drive electrode and induction electrode had two coupling paths:

Path 1, the node capacitor path.During touch, node capacitor reduces, and namely drives signal and reduces by the electric current that node capacitor is coupled to induction electrode, and this is to detect the variation that needs.

Path 2, C2 and C3 path.Equivalent capacity C2 and C3 have increased the electric current that drives signal and induction electrode, and this is harmful to detection.Reduce C2 and C3 and can help to promote signal sensitivity, and by hollowing out electrode pattern, can reduce above-mentioned coupling capacitor C2 and the size of C3, can satisfy normal request for utilization during less than 0.7＜mm apart from touch-screen/plate Surface Vertical distance at electrode pattern.

The surface of considering capacitance plate is covered with electric field, and equally distributed electric field has very great help to accuracy and the linearity that touches line, can promote the user and experience.And latticed hollowing out, not only can weaken C2 and C3 but also can allow the homogeneity of electric field not have significantly sacrificing, therefore further, above-mentioned hollowing out as grid type hollows out, rather than in the middle of electrode, hollow out fully, the cut-out of each pattern unit has 2 grids at least, and the cut-out area accounts for 5%～95% of the drive electrode pattern total area on driving and the induction electrode pattern.

Further, balanced for guaranteeing the integral light-transmitting rate, can also design filling in cut-out fast, this filling block is divided into identical material, for example ITO with electrode part.

Above-mentioned drive electrode layer and induction electrode layer can be laid in two-layer different basically, structure as shown in Figure 1, also can adopt the single-layer type structure, be laid on the same substrate, vertical range between drive electrode layer and the induction electrode layer is in 0mm～1.5mm scope, and wherein 0mm is corresponding to the situation that is laid in same substrate.Fig. 4 to Fig. 6 just shows the shape of drive electrode layer and induction electrode layer as an example of the single-layer type structure example, wherein 1 and 2 be respectively the induction and drive electrode, Fig. 4 and Fig. 5 are that two kinds of electrodes all hollow out, and among Fig. 6 only drive electrode 2 hollow out.If need the design filling block, can be as in each grid, designing a filling block 3 among Fig. 4, also can in each grid, design a plurality of filling blocks 31 such as Fig. 5, when being laid in same substrate, horizontal range d between drive electrode layer and the described induction electrode layer is 0.01mm～1mm, capacitive transducer is assemblied on the LCD, and there are one deck ITO screen layer or electrode in part LCD surface, but the electric field of this screen layer or electrode Absorption Capacitance sensor upper surface, can cause electric field inhomogeneous, cause customer experience relatively poor.Less horizontal range helps to reduce LCD screen layer or electrode pair, alleviates defects.

Aforesaid substrate can adopt glass, PET (Polythylene terephthalate, polyethylene terephthalate), PMMA (Polymethylmethacrylate, polymethylmethacrylate, the popular name acrylic), PCB (Printed Circuit Board, printed-wiring board (PWB)) substrate of material such as, thickness all can in 0.02mm～2mm scope.

During implementation, can adopt above-mentioned capacitive touch sensors to make independent touch detecting apparatus, comprise aforesaid capacitive touch sensors, the touch controller that is connected with described capacitive touch sensors.

Above-mentioned touch detecting apparatus can directly be produced in the various capacitive touch control terminals, such as capacitance type touch key control terminal, capacitance touch draw runner control terminal, capacitance touch runner control terminal and capacitive touch screen terminal etc.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. capacitive touch sensors, comprise the drive electrode layer that is laid with the drive electrode pattern and the induction electrode layer that is laid with the induction electrode pattern, it is characterized in that, in described drive electrode pattern and the described induction electrode pattern, described at least drive electrode pattern inside hollows out.

2. capacitive touch sensors as claimed in claim 1 is characterized in that, described hollowing out as grid type hollows out, and the cut-out of each pattern unit has 2 grids at least.

3. capacitive touch sensors as claimed in claim 1 is characterized in that, described cut-out is laid with one or more filling blocks.

4. capacitive touch sensors as claimed in claim 1, it is characterized in that, the cut-out area accounts for 5%～95% of the drive electrode pattern total area on the described drive electrode pattern, and the cut-out area accounts for 5%～95% of the induction electrode pattern total area on the described induction electrode pattern.

5. capacitive touch sensors as claimed in claim 1 is characterized in that, described drive electrode layer and described induction electrode layer are positioned on the same substrate or on the different substrate, vertical range between the two is in 0mm～1.5mm scope.

6. capacitive touch sensors as claimed in claim 5 is characterized in that, the horizontal range between described drive electrode layer and the described induction electrode layer is 0.01mm～1mm.

7. capacitive touch sensors as claimed in claim 1 is characterized in that, described drive electrode layer and described induction electrode layer are located on the substrate of glass or PET or PMMA or PCB material.

8. capacitive touch sensors as claimed in claim 7 is characterized in that, the thickness of described substrate is in 0.02mm～2mm scope.

9. touch detecting apparatus, comprise capacitive touch sensors, with the touch controller that described capacitive touch sensors is connected, it is characterized in that, described capacitive touch sensors is such as each described capacitive touch sensors of claim 1 to 8.

10. a touch control terminal is characterized in that, comprises a touch detecting apparatus as claimed in claim 9.