CN102662551A

CN102662551A - Capacitive touch screen

Info

Publication number: CN102662551A
Application number: CN2012101133514A
Authority: CN
Inventors: 杜秀兰
Original assignee: SUZHOU HEMEISHUO TOUCH CONTROL TECHNOLOGY CO LTD
Current assignee: SUZHOU HEMEISHUO TOUCH CONTROL TECHNOLOGY CO LTD
Priority date: 2012-04-17
Filing date: 2012-04-17
Publication date: 2012-09-12

Abstract

The invention provides a capacitive touch screen. The capacitive touch screen comprises a substrate, wherein an intermediate area of the substrate is a display zone; first conducting channels and second conducting channels are distributed on the substrate in a staggered way and also distributed on the same conducting layer; the first conducting channels are broken off at the crossed parts between the first conducting channels and the second conducting channels; and each broken first conducting channel is connected with a metal wire arranged on the outer side of the display zone through a lead wire. According to the capacitive touch screen provided by the invention, the broken first conducting channels are connected by the metal leads arranged on the outer side of the display zone, and thus a single-layer multipoint type touch structure is realized; and in addition, the capacitive touch screen is simple in process and favorable in visual effect.

Description

A kind of capacitive touch screen

Technical field

The present invention relates to a kind of touch-screen, be meant a kind of capacitive touch screen especially.

Background technology

Touch-screen is a kind of simple, convenient, natural human-computer interaction device, and it has been widely used in various places.Touch-screen is of a great variety, divides by principle mainly to comprise resistance-type, condenser type, infrared type and surface acoustic wave type.Wherein projection-type mutual capacitance screen needs two conductive layers to come circuit etching; Every layer of conductive layer can etch the path of several separate insulation; Wherein the path on one deck is used for doing T (transmission) passage and sends signal, and another layer line road is used for doing R (receive) channel receiving signal.T passage and R channel direction interlaced (general mutual homeotropic alignment), and want mutually insulated between T passage and the R passage, promptly middle must have non-conductive medium to keep apart.When the screen body running is not touched; The appearance value of responding between T passage and the R passage is a fixed value; Touch screen during body as conducting medium (like finger), because of change T layer and medium between the R layer changed two-layer between the appearance value of induction, this appearance value change amount is understood Be Controlled chip and is captured; Thereby identify corresponding T passage and R passage, judge the particular location of touch point according to the intervening portion of two passages.Generally speaking, said conductive layer will be plated on PET or the glass baseplate and use more than.According to above principle, the projection-type mutual capacitance of main flow screen has two kinds of structures at present:

A kind of two conductive layers that is to use, its structure is as depicted in figs. 1 and 2.Middle megohmite insulant with whole; Add the PET (abbreviation of Polyethylene terephthalate like colloid or colloid; Chinese is: poly terephthalic acid class plastics) etc., isolate R passage and T passage, the capacitance plate characteristics of this class formation are: T passage and R passage are distributed in respectively on two aspects.Its shortcoming is: 1) material cost is high: the number of plies is many more, and the material of consumption is many more, and cost is high more; 2) finished product thickness is thick, can't satisfy the design requirement of the ultra-thin type of client; 3) process route is complicated: need through the multiple tracks clustered operation, every many one procedure need the artificial and loss yield of loss.As shown in Figure 1, wherein viewing area 1 is positioned in the middle of the substrate 3, and substrate 3 be PET or glass baseplate, and being coated with first conductive channel 2 and second conductive channel, 5, two conductive layers on the substrate 3 successively, to pass through optical adhesive 4 bonding, as select optical cement OCA or other colloids for use.Wherein, 5 one T passages of first conductive channel 2 and second conductive channel for the transmission signal, another is then for receiving the R passage of signal.

And another kind of structure is to accomplish T passage and R passage on the same aspect, generally is referred to as the technology of putting up a bridge at present, its structure such as Fig. 3 and shown in Figure 4, and first conductive channel 2 and second conductive channel 5 are positioned at same conductive layer.Specific practice is: the figure that at first etches T passage and R passage on one deck conducting film; But it is conducting that two kinds of passages have only a kind of passage in staggered place; A kind of in addition passage breaks off herein; Plate insulation course 6 then in the staggered place, on insulation course 6, couple together the R or the T passage that break off to reach the conducting effect again with connecting conductive layer 7.The capacitance plate principal feature of this class formation is: 1) R passage and T passage only need one deck conductive layer; 2) megohmite insulant is distributed in the place that whole active region T passage and R passage cross; 3) because insulation course 6 is positioned at viewing area 1 with connecting conductive layer 7, thus megohmite insulant with its on the conductive materials that is connected to accomplish not visual.Its shortcoming is: 1) the disposable input of machinery and equipment is huge; 2) the visual effect of product is bad; 3) technology relative complex, difficulty is big.

Summary of the invention

The present invention proposes a kind of capacitive touch screen, can realize that not only the individual layer multipoint mode touches structure, and technology is simple, and visual effect is good.

Technical scheme of the present invention is achieved in that a kind of capacitive touch screen; Comprise substrate, the zone line of said substrate is the viewing area, is staggeredly distributed with first conductive channel and second conductive channel on the said substrate; Wherein, Said first conductive channel and second conductive channel are distributed in same conductive layer, and said first conductive channel breaks off with the second conductive channel intersection, and first conductive channel of every disconnection links to each other with a strip metal lead that is arranged on the outside, viewing area through guide line.

Preferably, the mutual homeotropic alignment of said first conductive channel and second conductive channel distributes, and is the capable n column distribution of m, and m, n are natural number.

Preferably, said first conductive channel is pressed column distribution, and first conductive channel that every row break off links to each other through a strip metal lead, and the plain conductor staggered place of the guide line of every row and other row is provided with insulation course.

Preferably, said n row plain conductor is evenly distributed on the non-visible area of both sides, viewing area.

Preferably, said insulation course is transparent material layer or non-transparent material layer.

Preferably, said first conductive channel is T passage that sends signal or the R passage that receives signal.

Preferably, the material of said substrate is PET plastics or glass baseplate.

The present invention contrasts prior art has following beneficial effect: capacitive touch screen provided by the invention; First conductive channel that will break off through the plain conductor that is arranged on the outside, viewing area links to each other; Thereby realize that the individual layer multipoint mode touches structure, and technology is simple, visual effect is good.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is existing two conductive layers projection-type mutual capacitance touchscreens structural representation;

Fig. 2 is the cross-sectional view along A-A line among Fig. 1;

The existing individual layer conductive layer of Fig. 3 technological projection-type mutual capacitance touchscreens structural representation of putting up a bridge;

Fig. 4 is the cross-sectional view along A-A line among Fig. 3;

Fig. 5 is an individual layer capacitor conductive layer formula touch screen structure synoptic diagram of the present invention.

Among the figure:

1 viewing area, 2 first conductive channels, 3 substrates

4 adhesive glues, 5 second conductive channels, 6 insulation courses

7 connecting conductive layers, 8 plain conductors

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

See also Fig. 5, a kind of capacitive touch screen provided by the invention comprises substrate 3; The zone line of substrate 3 is viewing area 1; Be staggeredly distributed with first conductive channel 2 and second conductive channel 5 on the substrate 3, wherein, first conductive channel 2 and second conductive channel 5 are distributed in same conductive layer; First conductive channel 2 breaks off with second conductive channel, 5 intersections, and first conductive channel 2 of every disconnection links to each other with a strip metal lead 8 that is arranged on 1 outside, viewing area through guide line.

Capacitive touch screen provided by the invention, wherein, first conductive channel 2 and second conductive channel, 5 general mutual homeotropic alignments distribute, and are the capable n column distribution of m, and m, n are natural number.First conductive channel 2 is pressed column distribution, and first conductive channel 2 that every row break off links to each other through a strip metal lead 8, and the guide line of every row is provided with insulation course 6 with the plain conductor of other row 8 staggered places.Said n row plain conductor 8 is evenly distributed on the non-visible area of 1 left and right sides, viewing area.Certainly, first conductive channel 2 also can distribute by row, and n row metal lead 8 is evenly distributed on the non-visible area of both sides about in the of 1, viewing area.Because insulation course 6 is positioned at non-visible area, so insulation course 6 can be transparent material layer or non-transparent material layer.

In sum, capacitive touch screen provided by the invention does not have crossing of T passage and R passage in viewing area 1.In viewing area 1; First conductive channel 2 of etching whole piece and second conductive channel 5; Both break off in the intersection; The conductive channel that breaks off extends to non-visible area through guide line, in non-visible area, couples together the conductive channel of segmentation with plain conductor 8 then, constitutes R (or T) passage of whole piece.Wherein plain conductor 8 prints insulation course 6 with the place that T (or R) passage crosses, and this megohmite insulant does not require not visual.Concrete advantage is following:

1) material cost significantly reduces: with respect to two conductive layers structure touch-screen, can reduce by 60% starting material use amount at least.

2) thickness attenuation: than two conductive layers structure touch-screen, can reduce at least more than the 0.15mm, one deck PET base material thickness is 0.125mm at least, and optical insulation glue is 0.025mm at least, adds up to reduce 0.15mm at least.

3) simplify production process: than two conductive layers structure touch-screen, reduced every layer of structure operation of processing separately, and saved the operation of combination in twos; Than individual layer conductive layer bridging technology touch-screen, simplified the operation of visible area plating insulation course and conductive layer.

4) reduce input to the machinery and equipment cost: than individual layer conductive layer bridging technology touch-screen, the required process equipment cost of new invention is much smaller than the required equipment cost of bridging technology.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. capacitive touch screen; Comprise substrate (3); The zone line of said substrate (3) is viewing area (1); Be staggeredly distributed with first conductive channel (2) and second conductive channel (5) on the said substrate (3), it is characterized in that, said first conductive channel (2) and second conductive channel (5) are distributed in same conductive layer; Said first conductive channel (2) breaks off with second conductive channel (5) intersection, and first conductive channel (2) of every disconnection links to each other with a strip metal lead (8) that is arranged on the outside, viewing area (1) through guide line.

2. capacitive touch screen as claimed in claim 1 is characterized in that, said first conductive channel (2) and second conductive channel (5) homeotropic alignment each other distribute, and are the capable n column distribution of m, and m, n are natural number.

3. capacitive touch screen as claimed in claim 2; It is characterized in that; Said first conductive channel (2) is pressed column distribution, and first conductive channel (2) that every row break off links to each other through a strip metal lead (8), and the guide line of every row is provided with insulation course (6) with the plain conductor of other row (8) staggered place.

4. capacitive touch screen as claimed in claim 2 is characterized in that, said n row plain conductor (8) is evenly distributed on the non-visible area of both sides, viewing area (1).

5. capacitive touch screen as claimed in claim 3 is characterized in that, said insulation course (6) is transparent material layer or non-transparent material layer.

6. like each described capacitive touch screen of claim 1～5, it is characterized in that said first conductive channel (2) is T passage that sends signal or the R passage that receives signal.

7. like each described capacitive touch screen of claim 1～5, it is characterized in that the material of said substrate (3) is PET plastics or glass baseplate.