CN208255862U - A kind of piezoelectric touch screen and electronic product - Google Patents
A kind of piezoelectric touch screen and electronic product Download PDFInfo
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- CN208255862U CN208255862U CN201821018759.2U CN201821018759U CN208255862U CN 208255862 U CN208255862 U CN 208255862U CN 201821018759 U CN201821018759 U CN 201821018759U CN 208255862 U CN208255862 U CN 208255862U
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Abstract
The utility model discloses a kind of piezoelectric touch screen and electronic products, wherein the piezoelectric touch screen includes substrate, the transparent conductive film positioned at substrate surface, the upper surface of transparent piezoelectric film is provided with the first conductive film layer, lower surface is provided with the second conductive film layer: being provided with a pair of of first electrode on the first conductive film layer, a pair of and perpendicular second electrode of first electrode is provided on the second conductive film layer.Above-mentioned technical proposal disclosed in the present application, separation of charge can occur after being locally pressurized, generate polarization phenomena for transparent piezoelectric film, and make the first conductive film layer and the second conductive film layer that polarization phenomena occur, corresponding charge is collected by first electrode and second electrode, measurement voltage simultaneously obtains the relationship between voltage to calculate the coordinate of touch location, namely piezoelectric touch screen is not necessarily to consider the influence of dielectric or hydraulic pressure, local compression position need to only be paid close attention to, piezoelectric touch screen is worked in water, to expand the application range of touch screen.
Description
Technical field
The utility model relates to touch screen technology fields, more specifically to a kind of piezoelectric touch screen and electronic product.
Background technique
Touch screen is a kind of induction type liquid crystal display device of the input signals such as receivable contact, as a kind of newest
Computer input setting, be at present most simply, conveniently, a kind of natural man-machine interaction mode.
Currently, common touch screen has condenser type, resistance-type, infrared-type, surface acoustic wave type etc..But these are touched
Screen can not but work in water.Such as: it is that touch is sensed according to the variation of capacitor for capacitive touch screen
Position, but since water is a kind of dielectric, so can not work in water.In addition, since the hydraulic pressure in deep water compares
Height, then the upper layer and lower layer conductive film of resistive touch screen can contact because of the effect of hydraulic pressure, therefore it also can not be in water
In work.
In conclusion how a kind of touch screen that can be worked in water is provided, to expand the application range of touch screen,
It is current those skilled in the art technical problem urgently to be resolved.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of piezoelectric touch screen and electronic product, the piezoelectric touch screen
It can work in water environment, to expand the application range of touch screen.
To achieve the goals above, the utility model provides the following technical solutions:
A kind of piezoelectric touch screen, including substrate, positioned at the transparent piezoelectric film of the substrate surface, the transparent piezoelectric is thin
The upper surface of film is provided with the first conductive film layer, lower surface is provided with the second conductive film layer:
Wherein, it is provided with a pair of of first electrode on first conductive film layer, is provided with one on second conductive film layer
To the second electrode perpendicular with the first electrode.
Preferably, bonding by OCA between the substrate and second conductive film layer.
Preferably, the substrate is glass, plastics, any one in decorative membrance.
Preferably, the transparent piezoelectric film is polymer piezoelectric film or photoetching composite piezoelectric material film.
Preferably, first conductive film layer and second conductive film layer are ito film layer, nano silver, metal grill
In any one.
Preferably, the first electrode, the second electrode are metal electrode.
Preferably, the metal electrode is molybdenum or silver.
A kind of electronic product, including piezoelectric touch screen described in any of the above embodiments.
The utility model provides a kind of piezoelectric touch screen and electronic product, and wherein the piezoelectric touch screen includes substrate, position
In the transparent conductive film of substrate surface, the upper surface of transparent piezoelectric film is provided with the first conductive film layer, lower surface is provided with
Second conductive film layer: where a pair of of first electrode is provided on the first conductive film layer, be provided on the second conductive film layer it is a pair of with
The perpendicular second electrode of first electrode.
Charge point can occur after being locally pressurized for above-mentioned technical proposal disclosed in the present application, transparent piezoelectric film
From, generate polarization phenomena, and make the first conductive film layer and second for being separately positioned on transparent piezoelectric film upper and lower surfaces
Polarization phenomena occur for conductive film layer, and the first electrode by being arranged on the first conductive film layer and setting are on the second conductive film layer
Second electrode collect corresponding charge, measurement touch location respectively the voltage between two electrodes in first electrode, with
And the voltage between two electrodes in second electrode, and the relationship between voltage is respectively obtained to calculate touch location
Coordinate namely piezoelectric touch screen are not necessarily to consider the influence of dielectric or hydraulic pressure, only need to pay close attention to local compression position, so that
Piezoelectric touch screen can work in water, to expand the application range of touch screen.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of structural schematic diagram of piezoelectric touch screen provided by the embodiment of the utility model；
Fig. 2 is the upper surface schematic diagram of transparent piezoelectric film provided by the embodiment of the utility model；
Fig. 3 is the lower surface schematic diagram of transparent piezoelectric film provided by the embodiment of the utility model；
Fig. 4 is that distribution of charges of the transparent piezoelectric film provided by the embodiment of the utility model after local compression occurs is shown
It is intended to；
Fig. 5 is transparent piezoelectric film provided by the embodiment of the utility model, the first conductive film layer and the second conductive film layer
Distribution of charges schematic diagram after polarizing；
Fig. 6 is that the voltage relationship provided by the embodiment of the utility model according between touch location and first electrode determines touching
Touch the schematic diagram of y-coordinate.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Show referring to Figure 1 to the structure that Fig. 3, Fig. 1 show a kind of piezoelectric touch screen provided by the embodiment of the utility model
It is intended to, Fig. 2 shows the upper surface schematic diagram of transparent piezoelectric film provided by the embodiment of the utility model, Fig. 3 shows this reality
With the lower surface schematic diagram for the transparent piezoelectric film that new embodiment provides.
A kind of piezoelectric touch screen provided by the embodiment of the utility model may include substrate 1, positioned at the saturating of 1 surface of substrate
Bright piezoelectric membrane 2, the upper surface of transparent piezoelectric film 2 is provided with the first conductive film layer 21, lower surface is provided with the second conductive film
Layer 22:
Wherein, it is provided with a pair of of first electrode 211 on the first conductive film layer 21, is provided with a pair on the second conductive film layer 22
The second electrode 222 perpendicular with first electrode 211.
Piezoelectric touch screen includes the substrate 1 to play a supportive role, and the upper surface of the substrate 1, which is distributed with, to be made out of a piezoelectric material
Transparent piezoelectric film 2, the upper surface of the transparent piezoelectric film 2 is provided with the first conductive film layer 21, lower surface is provided with second and leads
Electrolemma layer 22.Wherein, the first conductive film layer 21 and the second conductive film layer 22 can be sunk respectively by the modes such as sputtering or being coated with
The upper and lower surfaces in transparent piezoelectric film 2 are accumulated, and the transmitance of light can be increased using transparent piezoelectric membrane.
A pair of of first electrode 211 is set by modes such as silk-screens on the first conductive film layer 21, and in the second conductive film layer
A pair of and perpendicular second electrode 222 of first electrode 211 is arranged by same mode on 22, to collect corresponding lead respectively
Charge on electrolemma layer, and convenient for according to parameters such as the corresponding electric currents of mobile measurement, resistance, voltage of charge.By first electrode
211 and second electrode 222 setting be mutually perpendicular to be for form right angle coordinate system, in order to determine touch location abscissa and
Ordinate, and specific touch location can be determined according to abscissa and ordinate convenient for the controller in piezoelectric touch screen, and
Convenient for carrying out corresponding operation according to touch location.
In order to keep the working range of piezoelectric touch screen big as far as possible, and in order to be accurately determined touch location, piezoelectricity touching is improved
The sensitivity of screen is touched, then first electrode 211 and second electrode 222 are usually separately positioned on to the respective side of transparent piezoelectric film 2
Bian Shang.
When user presses piezoelectric touch screen position, the transparent piezoelectric film 2 at the position can deform, accordingly
Ground, the charge at the position can misplace because of being pressurized, namely are in the charge of equilibrium state originally and can be destroyed, from
And polarization phenomena are generated, positive and negative opposite charge is distributed in this upper and lower surfaces for allowing for transparent piezoelectric film 2 respectively,
Specifically it may refer to Fig. 4, it illustrates transparent piezoelectric films provided by the embodiment of the utility model after local compression occurs
Distribution of charges schematic diagram.It is of course also possible to the distribution of charges that is positive is in the upper surface of transparent piezoelectric film 2, and negative electrical charge point
Cloth is determined in the lower surface of transparent piezoelectric film 2, this needs according to the structure and its characteristic of transparent piezoelectric film 2.
After transparent piezoelectric film 2 polarizes, since electrostatic induction acts on, then it can make to be disposed thereon the of surface
One conductive film layer 21 and the second conductive film layer 22 that its lower surface is arranged in occur to polarize and go out charge in surface induction,
Specifically may refer to Fig. 5, it illustrates transparent piezoelectric film provided by the embodiment of the utility model, the first conductive film layer and
Second conductive film layer polarize after distribution of charges schematic diagram.First conductive film layer 21 and 22 surface of the second conductive film layer are produced
Raw charge can flow to set first electrode 211, second electrode 222 respectively.
Since set orthogonal first electrode 211 and second electrode 222 and four-wire resistance type touch screen are similar
Seemingly, then touch location can be determined by the mode similar with four-wire resistance type touch screen.First conductive film layer 21 and second
When flowing to corresponding first electrode 211 and second electrode 222 respectively, piezoelectricity touches charge caused by 22 surface of conductive film layer
Control chip set by screen inside can scan the first conductive film layer 21 and the second conductive film layer 22 respectively, touch position to measure
Set the voltage between each electrode in first electrode 211 respectively and touch location respectively with it is every in second electrode 222
Voltage between a electrode, and the coordinate by voltage than determining touch location.
In order to be more clearly illustrated to decision process, here to be arranged in the first of 2 upper surface of transparent piezoelectric film
It illustrates how to determine the y-coordinate that user is touched on piezoelectric touch screen for conductive film layer 21, first electrode 211, referring to
Fig. 6, it illustrates the voltage relationships provided by the embodiment of the utility model according between touch location and first electrode to determine touching
Touch the schematic diagram of y-coordinate.Specifically, it is measured by control chip between the electrode above in touch location and first electrode 211
Electric current and resistance, obtain the voltage U between touch location and electrode above1；Pass through measurement touch location and first electrode
The electric current and resistance between electrode below in 211, obtains the voltage U between touch location and following electrode2, further according to pre-
The length L between electrode and following electrode the upper surface of in the first electrode 211 first measured, obtains the y of touch location
Coordinate are as follows:
It should be noted that being that touching is calculated by the starting point of y-axis of the electrode the upper surface of in first electrode 211 here
Touch the y-coordinate of position.Similar, then user can be determined on the second conductive film layer 22 touched on piezoelectric touch screen
The x coordinate touched, the particular content of said determination mode may refer to the detailed measurement content in four-wire resistance type touch screen, herein
It repeats no more.
It follows that the piezoelectric touch screen is not only simple in structure, manufacturing cost is low, and the touch screen can be in water environment
In operated, namely when placing it in water environment, as long as user presses the touch screen, which can pass through transparent pressure
Deformation, polarization and the polarization of the first conductive film layer 21 and the second conductive film layer 22, the flowing of charge of conductive film 2, determine tool
The touch location of body.
Charge point can occur after being locally pressurized for above-mentioned technical proposal disclosed in the present application, transparent piezoelectric film
From, generate polarization phenomena, and make the first conductive film layer and second for being separately positioned on transparent piezoelectric film upper and lower surfaces
Polarization phenomena occur for conductive film layer, and the first electrode by being arranged on the first conductive film layer and setting are on the second conductive film layer
Second electrode collect corresponding charge, measurement touch location respectively the voltage between two electrodes in first electrode, with
And the voltage between two electrodes in second electrode, and the relationship between voltage is respectively obtained to calculate touch location
Coordinate namely piezoelectric touch screen are not necessarily to consider the influence of dielectric or hydraulic pressure, only need to pay close attention to local compression position, so that
Piezoelectric touch screen can work in water, to expand the application range of touch screen.
A kind of piezoelectric touch screen provided by the embodiment of the utility model can lead between substrate 1 and the second conductive film layer 22
It is bonding to cross OCA.
The first conductive film layer 21 is set in 2 upper surface of transparent piezoelectric film, and the second conductive film layer is set in its lower surface
After 22, then it can use OCA (Optically Clear Adhesive, Optical transparent adhesive) and bond transparent piezoelectric film 2
On substrate 1, make substrate 1 and the second conductive film layer 22 bonding.OCA has the spies such as high adhesion, enhanced water resistance, weatherability
Point, is used between substrate 1 and transparent piezoelectric film 2 adhesive force that can not only increase between the two, will not also pair
The transmitance of light impacts.Certainly, except substrate 1 and transparent piezoelectric film 2 being bonded together except through OCA,
The two can also be bonded together using other materials, such as AB glue etc..In addition to this it is possible to pass through sputtering, welding etc.
The two is bonded together by mode, and the utility model does not do any restriction to bonding mode between the two.
A kind of piezoelectric touch screen provided by the embodiment of the utility model, substrate 1 can be in glass, plastics, decorative membrances
Any one.
Substrate 1 used in piezoelectric touch screen can be any one in glass, plastics, decorative membrance.Glass base
Plate, plastic base, decorative membrance substrate all have good photopermeability, good stability, and cost is relatively low, because
This, can extend the service life of piezoelectric touch screen to a certain extent, reduce preparation and use cost.
A kind of piezoelectric touch screen provided by the embodiment of the utility model, transparent piezoelectric film 2 can be thin for polymer piezoelectric
Film or photoetching composite piezoelectric material film.
Transparent piezoelectric film 2 in piezoelectric touch screen is specifically as follows polymer piezoelectric film, photoetching composite piezoelectric material
Any one in film.
It should be noted that mentioned polymer piezoelectric film includes but is not limited to PVDF (Poly here
(vinylidene fluoride), Kynoar), PVDF has stronger toughness, and there is weatherability, resistance to ag(e)ing etc..
Photoetching composite piezoelectric material film then can be that PVDF and other piezoelectric materials progress with piezoelectric effect are compound prepared
Transparent piezoelectric film 2.
A kind of piezoelectric membrane provided by the embodiment of the utility model, the first conductive film layer 21 and the second conductive film layer 22
Think ito film layer, nano silver, any one in metal grill.
The first conductive film layer 21 on transparent piezoelectric film 2 is set and the second conductive film layer 22 all can be ITO
(Indium Tin Oxide, tin indium oxide) film layer, nano silver, any one in metal grill, these materials all have good
Good electric conductivity, thus can be quickly by charge transport to corresponding electrode, in order to quickly determine when touching
Touch location, and corresponding operation is carried out according to touch location, to improve the sensitivity of piezoelectric touch screen.
A kind of piezoelectric touch screen provided by the embodiment of the utility model, first electrode 211, second electrode 222 all can be
Metal electrode.
In order to improve the speed and electric conductivity of collecting charge, and in order to improve the sensitivity of piezoelectric touch screen, first electrode
211 and second electrode 222 all can be metal electrode.Certainly, in addition to using metal as first electrode 211 and second electrode
It, can also be using the relatively good graphite of electric conductivity, graphene etc. as first electrode 211 and second electrode 222 except 222.
A kind of piezoelectric touch screen provided by the embodiment of the utility model, metal electrode can be molybdenum or silver.
Above-mentioned mentioned metal electrode is specifically as follows molybdenum, or silver, wherein molybdenum not only has good
Electric conductivity, and it has good adhesive force between the first conductive film layer 21 and the second conductive film layer 22, so as to drop
The probability that low first electrode 211 and second electrode 222 are fallen off in use, to extend the use longevity of piezoelectric touch screen
Life；Silver metal then has preferable thermal conductivity and electric conductivity, and its physicochemical property is relatively stable, and both of which can pass through silk
The modes such as print are arranged on transparent piezoelectric film 2.
Certainly, in addition to using molybdenum, perhaps silver can also be made other than metal electrode using silver alloy or other alloys
For metal electrode, at this any restriction is not done to specific material used in metal electrode.
The utility model embodiment additionally provides a kind of electronic product, including any of the above-described kind of piezoelectric touch screen.
Any of the above-described kind of piezoelectric touch screen is applied in electronic product, such as mobile phone, camera, so that these electronic products
Included in other components under the premise of can be worked in water environment, with the electronic product of the piezoelectric touch screen
It can work in water environment, to expand the application range of electronic product.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic.?
Do not have in the case where more limiting, the element limited by sentence "including a ...", it is not excluded that including the element
There is also other identical elements in process, method, article or equipment.In addition, provided by the embodiment of the utility model above-mentioned
In technical solution with correspond to the consistent part of technical solution realization principle and unspecified in the prior art, in order to avoid excessive superfluous
It states.
The foregoing description of the disclosed embodiments makes those skilled in the art can be realized or use the utility model.
Various modifications to these embodiments will be apparent for a person skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the present utility model.Therefore, this is practical new
Type is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase
Consistent widest scope.
Claims (8)
1. a kind of piezoelectric touch screen, which is characterized in that described including substrate, positioned at the transparent piezoelectric film of the substrate surface
The upper surface of transparent piezoelectric film is provided with the first conductive film layer, lower surface is provided with the second conductive film layer:
Wherein, a pair of of first electrode is provided on first conductive film layer, be provided on second conductive film layer it is a pair of with
The perpendicular second electrode of the first electrode.
2. piezoelectric touch screen according to claim 1, which is characterized in that between the substrate and second conductive film layer
It is bonding by OCA.
3. piezoelectric touch screen according to claim 1, which is characterized in that the substrate is glass, in plastics, decorative membrance
Any one.
4. piezoelectric touch screen according to claim 1, which is characterized in that the transparent piezoelectric film is that polymer piezoelectric is thin
Film or photoetching composite piezoelectric material film.
5. piezoelectric touch screen according to any one of claims 1 to 4, which is characterized in that first conductive film layer and institute
Stating the second conductive film layer is ito film layer, nano silver, any one in metal grill.
6. piezoelectric touch screen according to claim 5, which is characterized in that the first electrode, the second electrode are
Metal electrode.
7. piezoelectric touch screen according to claim 6, which is characterized in that the metal electrode is molybdenum or silver.
8. a kind of electronic product, which is characterized in that including piezoelectric touch screen as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018759.2U CN208255862U (en) | 2018-06-28 | 2018-06-28 | A kind of piezoelectric touch screen and electronic product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018759.2U CN208255862U (en) | 2018-06-28 | 2018-06-28 | A kind of piezoelectric touch screen and electronic product |
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| CN208255862U true CN208255862U (en) | 2018-12-18 |
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| CN201821018759.2U Active CN208255862U (en) | 2018-06-28 | 2018-06-28 | A kind of piezoelectric touch screen and electronic product |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563368A (en) * | 2018-06-28 | 2018-09-21 | 信利光电股份有限公司 | A kind of piezoelectric touch screen and electronic product |
| CN110212002A (en) * | 2019-06-13 | 2019-09-06 | 京东方科技集团股份有限公司 | Display back plate, display panel and display device |
-
2018
- 2018-06-28 CN CN201821018759.2U patent/CN208255862U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563368A (en) * | 2018-06-28 | 2018-09-21 | 信利光电股份有限公司 | A kind of piezoelectric touch screen and electronic product |
| CN110212002A (en) * | 2019-06-13 | 2019-09-06 | 京东方科技集团股份有限公司 | Display back plate, display panel and display device |
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