CN101526874B - Resistance-type touch screen and manufacturing method thereof - Google Patents
Resistance-type touch screen and manufacturing method thereof Download PDFInfo
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- CN101526874B CN101526874B CN2008100657681A CN200810065768A CN101526874B CN 101526874 B CN101526874 B CN 101526874B CN 2008100657681 A CN2008100657681 A CN 2008100657681A CN 200810065768 A CN200810065768 A CN 200810065768A CN 101526874 B CN101526874 B CN 101526874B
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Abstract
The invention applies to the field of touch screens, and provides a resistance-type touch screen and a manufacturing method thereof. The touch screen comprises a lower conducting layer, a flexible printed circuit board and an upper conducting layer, wherein the lower conducting layer is taken as a voltage distribution layer; isolation points are attached to one side of the lower conducting layer; the flexible printed circuit board is positioned on the isolation-point side of the lower conducting layer and is electrically connected with the lower conducting layer; and the upper conducting layer is used for detecting voltage and is bonded to the flexible printed circuit board. The resistance-type touch screen provided by the invention has the advantages of leaving out conductive electrodes, insulation-layer printing, acid etching, demoulding and other intermediate links in a process, shortening process flow, improving product yield and saving manpower and material resources.
Description
Technical field
The invention belongs to the touch-screen field, relate in particular to a kind of resistive touch screen and preparation method thereof.
Background technology
Touch-screen has got into every field as a kind of human-computer interaction interface, especially in portable electric appts and common query equipment, is widely used.Resistive touch screen is a kind of sensor, and (X, physical location Y) convert the voltage of representing X axial coordinate and Y axial coordinate into, and (Liquid Crystal Display, LCD) module has all adopted resistive touch screen in a lot of liquid crystal displays with touch point in the rectangular area for it.The screen body portion of resistive touch screen is a multi-layer compound film that is complementary with display surface; By one deck glass or organic glass as basic unit; The surface scribbles the conductive layer of layer of transparent; Be stamped one deck outside surface cure process, smooth scratch resistant plastic layer above again, its inside surface also scribbles the layer of transparent conductive layer, and many tiny septum pellucidums are arranged between two conductive layers, and they separate insulation from naming a person for a particular job.
When the pressure (as pushing through nib or finger) that receives when touch screen surface was enough big, the two conductive layers of mutually insulated had just had a contact in the position, touch point, the even voltage field of 5V of lower conductiving layer connection X or Y direction; Make the output of going up conductive layer become non-zero by zero; After this on-state Be Controlled device detects, carry out analog digital conversion (Analogue Digital Converter, ADC); Be about to voltage transitions and become coordinate position, realize the location, touch point.
According to resistive touch screen extension line number what, can be divided into four lines, five lines, six lines etc.Fig. 1 shows the structure of four-wire resistance type touch screen, and 1 is last conductive layer, and 2,10 is silver (AG) layer (the silver slurry that generally uses at present); 3,9 is insulation course, and 4 is adhesive-layer, and 5,7 is anisotropy conductiving glue (AnisotropicConductive Plastic; ACP) layer, 6 be flexible print circuit board (Flexible Printed Circuit, FPC); 8 is adhesive-layer, and 11 is isolating points, and 12 is lower conductiving layer.Wherein, last conductive layer 1 uses indium tin oxide (Indium Tin Oxide, ITO) film (film); Lower conductiving layer 12 uses ito glass; Middle isolate with isolating dot matrix (DOT SPACER), printing insulation course 3 and 9 between upper and lower conductive layers, tack coat 4 and 8 and some processes protect printed layers.During four-wire resistance type touch screen work; The resistance of ITO is required than higher, so ITO must do very thinly, will accomplish evenly very difficulty under the so thin situation; Especially ito thin film; Can not can plate ITO by high temperature as ito glass, the low temperature coating technique is only grasped by minority producer, so ito thin film costs an arm and a leg.
Five traditional wire resistance type touch-screens will detect the task of contact point coordinate and all give lower conductiving layer; Therefore; Last conductive layer can expensive ito thin film material; And use transparency conducting layer to get final product, and transparency conducting layer do not have special demands to the homogeneity of resistance, can also increase the service life.
Yet; The manufacture craft more complicated of five traditional wire resistance type touch-screens; Need on glass plate, print acid-proof ink earlier and (adopt ultraviolet ray (Ultraviolet Rays; UV) ink printing of irradiation), pass through harsh, demoulding, printing isolating points (adopting the UV printing) back seal silver slurry (baking), seal front protecting glue (baking), seal back-protective glue (baking), seal insulating oil (adopting UV to print) then, print ACP (baking), print viscose glue (baking), cut into fritter at last.Simultaneously, because traditional five wire resistance type touch-screens are to give the conductive layer making alive through four angles, the corner electrode making alive can cause the pincushion distortion in the voltage field distribution; For fear of pincushion distortion; Need come the correct for both pincushion distortion through the resistor network of complicacy, form the linearization electric field, thus compensation; Mode about compensation is varied, is difficult for grasping; If compensate pincushion distortion with four limit electrode design, though effectively, linear effect is still existed, under the situation of large-size screen monitors, use can not be affected, but after the miniaturization, it is more outstanding that this influence will become, influence the touch-screen location.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of resistive touch screen and preparation method thereof, is intended to solve the problem of the complex manufacturing technology of traditional resistive touch screen.
The embodiment of the invention is achieved in that a kind of resistive touch screen, and said touch-screen comprises:
Lower conductiving layer is as the voltage distribution layer, and it simultaneously is attached with isolating points;
Flexible print circuit board is positioned at the isolating points side of said lower conductiving layer, is electrically connected said lower conductiving layer, and its four limit has dispersive electrode;
Last conductive layer is used for detecting voltage, with said flexible print circuit board bonding.
Another purpose of the embodiment of the invention is to provide a kind of equipment that adopts above-mentioned touch-screen.
Another purpose of the embodiment of the invention also is to provide a kind of method of making above-mentioned touch-screen, and said method comprises the steps:
On flexible print circuit board, form the electrode that disperses, republish the cohesiveness conductive material;
Printing one deck isolating points on lower conductiving layer;
Between upper and lower conductive layer, insert the said flexible print circuit board that prints the cohesiveness conductive material;
Said upper and lower conductive layer and said flexible print circuit board are combined into the touch-screen main body.
The resistive touch screen that the embodiment of the invention provides structurally only needs upper and lower conductive layers, isolating points and a flexible print circuit board; On technology, saved the intermediate link such as printing and harsh demoulding of conductive electrode, insulation course; Shortened technological process; Improve the product yield, saved manpower and materials.
Description of drawings
Fig. 1 is the structural representation of the four-wire resistance type touch screen that provides of prior art;
Fig. 2 is the structural representation of the resistive touch screen that provides of the embodiment of the invention;
Fig. 3 is the structural representation of the flexible print circuit board that is used for resistive touch screen that provides of the embodiment of the invention;
Fig. 4 is the making process flow diagram of the resistive touch screen that provides of the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The resistive touch screen that the embodiment of the invention provides structurally only needs upper and lower conductive layers, isolating points and a flexible print circuit board, and lower conductiving layer is as the voltage distribution layer, and it simultaneously is attached with isolating points; Flexible print circuit board is positioned at the isolating points side of lower conductiving layer, is electrically connected lower conductiving layer, and last conductive layer is used for detecting voltage; Bond with flexible print circuit board; Manufacture craft is simple, and is with low cost, and fabrication cycle shortens greatly.
Fig. 2 shows the structure of the resistive touch screen that the embodiment of the invention provides, and this resistive touch screen can be applied in various portable electric appts and the common query equipment.
1 is last conductive layer, and 2,4 are tack coat (generally adopting ACP), and 3 is flexible print circuit board, and 5 is isolating points, and 6 is lower conductiving layer.
Wherein, lower conductiving layer 6 is as the voltage distribution layer, and it simultaneously is attached with isolating points 5; Flexible print circuit board 3 is positioned at the isolating points side of lower conductiving layer 6; And being electrically connected lower conductiving layer 6, last conductive layer 1 is used for detecting voltage, through tack coat 2 and flexible print circuit board 3 bondings.
As one embodiment of the present of invention; Last conductive layer 1 uses transparency conducting layer; Can save expensive ito thin film material, and upward the homogeneity of 1 pair of transparency conducting layer of conductive layer does not have special demands, therefore go up conductive layer 1 and can select long material of life-span.Lower conductiving layer 6 uses the ito glass material.
In the embodiment of the invention, the electrode on four limits is not linear electrode but dispersive electrode on the flexible print circuit board 3.If directly two linear electrodes in the last conductive layer of existing four-wire resistance type touch screen are moved to lower conductiving layer, when giving two linear electrode making alives of directions X, if do not have electrode on the Y direction, what produce on the directions X so is that uniform electric field distributes; If the straight line electrode is also arranged on the Y direction, the voltage that produces on the directions X so distributes and will bend.Therefore; Bend for fear of the voltage distribution; The resistive touch screen that the embodiment of the invention provides interrupts the linear electrode on the flexible print circuit board, and is provided with according to the ratio in certain electrode district and vacant district, as long as satisfy the linearization requirement; The ratio in electrode district and vacant district can change flexibly, and electrode number also can have different designs.Vacant district ratio is big more when design, reduces the gathering that voltage is distributed in a unsettled end more easily, and the electrode district ratio is big more, reduces the bending that voltage is distributed in making alive one end more easily.As one embodiment of the present of invention, be foursquare touch-screen for effective perform region, it is best that electrode district and vacant district are arranged to 1: 1 effect.
Flexible print circuit board 3 uses the resistivity of electrodes will be far smaller than the requirement of ITO to resistance, can select the material of metal such as copper or other good conductivity.Simultaneously, last conductive layer 1 can not carry out etching with the ito glass that lower conductiving layer 6 adopts, and can improve raw-material utilization ratio greatly like this, and flexible print circuit board contraposition when assembling is simple.
In the embodiment of the invention, it is L shaped that the shape of flexible print circuit board 3 can be designed as an annular or two, also can be designed as other various shapes.With annular flexible print circuit board is example; As shown in Figure 3; Show the pros and cons of annular flexible print circuit board, when giving both sides electrode 31 making alives of directions X, keep the state that breaks off mutually between each electrode 32 on Y direction both sides; When touching generation, read magnitude of voltage by last conductive layer 1 and be sent to the coordinate that controller converts the touch point directions X to; When giving electrode 32 making alives on Y direction both sides, keep the state of disconnection mutually between each electrode 31 on directions X both sides, the mode that reads Y direction coordinate is identical with directions X.
In the embodiment of the invention, flexible print circuit board 3 is the cohesiveness conductive material with the material that is electrically connected between the lower conductiving layer 6.Above-mentioned cohesiveness conductive material can (AnisotropicConductive Film ACF), ACP etc. needs the conductive material of hot pressing, also can be other cohesiveness conductive material preferably for anisotropic conductive film; Simultaneously, above-mentioned cohesiveness conductive material can also can directly be produced on the flexible print circuit board 3 through certain mode attached on the lower conductiving layer 6.
In the embodiment of the invention, having only lower conductiving layer is the voltage distribution layer, and direct electrode through flexible print circuit board replaces in the traditional touch screen with producing linearizing electric field on X that prints electrode at lower conductiving layer and the Y both direction on lower conductiving layer.Therefore, in the resistive touch screen that the embodiment of the invention provides, the touch point the voltage on X and the Y both direction all be through on conductive layer detect and give the coordinate figure that controller converts X and Y direction to.
Fig. 4 shows the making flow process of the resistive touch screen that the embodiment of the invention provides, and details are as follows:
In step S401, printing cohesiveness conductive material on flexible print circuit board;
As one embodiment of the present of invention, the cohesiveness conductive material, conducting resinl for example can be printed on the two sides of flexible print circuit board, also can be printed on the corresponding one side of flexible print circuit board and lower conductiving layer.
In the embodiment of the invention, if at flexible print circuit board and the corresponding printing conductive glue of lower conductiving layer, then need on last conductive layer, print viscose glue, and on the flexible print circuit board with conducting resinl with above-mentioned printed viscose glue on conductive layer draw.As one embodiment of the present of invention, the viscose glue on last conductive layer can also can be printing conductive glue for pasting double faced adhesive tape.
In step S402, printing one deck isolating points on lower conductiving layer;
In step S403, between upper and lower conductive layer, insert the flexible print circuit board that has printed the cohesiveness conductive material;
In step S404, upper and lower conductive layer and flexible print circuit board are combined into the touch-screen main body.
As one embodiment of the present of invention, the combination of upper and lower conductive layer and flexible print circuit board can be adopted hot pressing mode.
The resistive touch screen that the embodiment of the invention provides structurally only needs upper and lower conductive layers, isolating points and a flexible print circuit board; On technology, saved protection link in the middle of printing and the harsh demoulding etc. of conductive electrode, insulation course; Shortened technological process; Improve the product yield, saved manpower and materials.Simultaneously; The four edges of lower conductiving layer all is made up of segment electrode; Add identical voltage on each segment electrode on same limit respectively separately; The ratio in segment electrode and adjacent vacant district can be provided with flexibly, makes touch-screen can be made into the arbitrary dimension size, helps five wire resistance type touch-screens popularizing on the portable electronic consumer goods.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a resistive touch screen is characterized in that, said touch-screen comprises:
Lower conductiving layer, as the voltage distribution layer, it simultaneously is attached with isolating points;
Flexible print circuit board is positioned at the isolating points side of said lower conductiving layer, is electrically connected said lower conductiving layer, and its four limit has dispersive electrode;
Last conductive layer is used for detecting voltage, with said flexible print circuit board bonding.
2. resistive touch screen as claimed in claim 1 is characterized in that, said upward conductive layer is a transparency conducting layer.
3. resistive touch screen as claimed in claim 1 is characterized in that, said flexible print circuit board is that an annular or two are L shaped.
4. resistive touch screen as claimed in claim 1 is characterized in that, when effective perform region of said touch-screen was square, the electrode district of said flexible print circuit board and the ratio in vacant district were 1: 1.
5. resistive touch screen as claimed in claim 1 is characterized in that, said flexible print circuit board is the cohesiveness conductive material with the material that is electrically connected between the lower conductiving layer.
6. equipment that adopts the touch-screen of claim 1.
7. a method of making the touch-screen of claim 1 is characterized in that, said method comprises the steps:
On flexible print circuit board, form the electrode that disperses, republish the cohesiveness conductive material;
Printing one deck isolating points on lower conductiving layer;
Between upper and lower conductive layer, insert the said flexible print circuit board that prints the cohesiveness conductive material;
Said upper and lower conductive layer and said flexible print circuit board are combined into the touch-screen main body.
8. method as claimed in claim 7 is characterized in that said cohesiveness conductive material is printed on the two sides of flexible print circuit board, perhaps is printed on the corresponding one side of flexible print circuit board and lower conductiving layer.
9. method as claimed in claim 8; It is characterized in that; When said cohesiveness conductive material was printed on flexible print circuit board and the corresponding one side of lower conductiving layer, before the step of printing one deck isolating points on the said lower conductiving layer, said method further may further comprise the steps:
On last conductive layer, print viscose glue;
On the said flexible print circuit board with conducting resinl with said printed viscose glue on conductive layer draw.
10. method as claimed in claim 9 is characterized in that, said viscose glue is double faced adhesive tape or conducting resinl.
11. method as claimed in claim 7 is characterized in that, the combined of said upper and lower conductive layer and said flexible print circuit board is used hot pressing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100657681A CN101526874B (en) | 2008-03-05 | 2008-03-05 | Resistance-type touch screen and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100657681A CN101526874B (en) | 2008-03-05 | 2008-03-05 | Resistance-type touch screen and manufacturing method thereof |
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| CN101526874A CN101526874A (en) | 2009-09-09 |
| CN101526874B true CN101526874B (en) | 2012-03-07 |
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| CN2008100657681A Active CN101526874B (en) | 2008-03-05 | 2008-03-05 | Resistance-type touch screen and manufacturing method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087429A (en) * | 2010-11-11 | 2011-06-08 | 信利半导体有限公司 | Method for binding LCD of 3D glasses by using anisotropic conducting adhesive |
| CN104956298A (en) | 2013-01-30 | 2015-09-30 | 福建科创光电有限公司 | One glass solution capacitive touch screen and manufacturing method thereof |
| CN103246413B (en) * | 2013-01-30 | 2016-11-02 | 福建科创光电有限公司 | Integrated capacitor induction touch panel and preparation method thereof |
| CN107300999B (en) * | 2017-07-07 | 2022-11-25 | 安徽精卓光显技术有限责任公司 | Pressure-sensitive touch display screen, pressure-sensitive touch screen and manufacturing method thereof |
| CN108897448B (en) * | 2018-06-20 | 2021-05-04 | 东莞市显触光电科技有限公司 | Pure plane special-shaped five-wire resistive touch screen with decorative panel in two-layer structure |
| CN113064527A (en) * | 2021-04-22 | 2021-07-02 | 成都伟大奇智能光电有限公司 | Anti-interference resistive touch screen with high light transmittance for civil aviation and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325054A (en) * | 2000-05-17 | 2001-12-05 | 株式会社日立制作所 | Screen input type display device |
| CN1438608A (en) * | 2003-03-18 | 2003-08-27 | 中国电子科技集团公司第五十五研究所 | Periphery electrode width changeable contact screen |
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2008
- 2008-03-05 CN CN2008100657681A patent/CN101526874B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325054A (en) * | 2000-05-17 | 2001-12-05 | 株式会社日立制作所 | Screen input type display device |
| CN1438608A (en) * | 2003-03-18 | 2003-08-27 | 中国电子科技集团公司第五十五研究所 | Periphery electrode width changeable contact screen |
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Owner name: SHENZHEN BYD ELECTRONIC COMPONENT CO., LTD. Free format text: FORMER OWNER: BIYADI CO., LTD. Effective date: 20150910 |
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Effective date of registration: 20150910 Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen BYD Electronic Component Co., Ltd. Address before: 518118 Pingshan Road, Pingshan Town, Shenzhen, Guangdong, No. 3001, No. Patentee before: Biyadi Co., Ltd. |
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Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen helitai photoelectric Co., Ltd Address before: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee before: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. |
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