CN202711198U - Piezoelectric touch screen capable of being folded and flexibly deformed - Google Patents
Piezoelectric touch screen capable of being folded and flexibly deformed Download PDFInfo
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- CN202711198U CN202711198U CN 201120386272 CN201120386272U CN202711198U CN 202711198 U CN202711198 U CN 202711198U CN 201120386272 CN201120386272 CN 201120386272 CN 201120386272 U CN201120386272 U CN 201120386272U CN 202711198 U CN202711198 U CN 202711198U
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Abstract
The utility model discloses a piezoelectric touch screen capable of being folded and flexibly deformed, and belongs to the technical field of piezoelectric touch screens. The piezoelectric touch screen comprises a flexible base plate, a piezoelectric thin film, an upper electrode and a lower electrode. The flexible base plate is placed inside a matched frame. The back face of the flexible base plate is bound with the upper electrode, the piezoelectric thin film and the lower electrode in sequence. The upper electrode and the lower electrode divide the piezoelectric thin film into array type zones. On the basis, another structure is that the back face of a flexible base plate is bound with an upper electrode, a first piezoelectric thin film, a middle portion electrode, a second piezoelectric thin film and a lower electrode in sequence. The piezoelectric touch screen can be deformed, twisted and even folded freely, and the information such as positions of acting force, strength of the acting force and motion trail of the acting force can still be obtained. And the piezoelectric touch screen is low in cost, good in performance and strong in market competitiveness.
Description
Technical field
The utility model belongs to the piezoelectric touch screen technical field, and particularly a kind of back attaches the three dimensionality piezoelectric touch screen of array piezoelectric membrane, but and the collapsible plastic deformation of touch-screen, still can work after the distortion.
Background technology
Along with the development of infotech, man-machine interaction mode is not confined to the traditional approachs such as mouse, keyboard, display yet.More convenience, fast, mode is affecting people's life intuitively, wherein touch-screen is obtaining rapidly development as one of the most practical novel human-machine interaction mode over nearly 20 years.
Piezoelectric has played vital effect at mechanics sensor, driver, and this patent relates to a kind of brand-new piezoelectric touch screen sensor technology.
Compare with traditional electric capacity, resistive touch screen, piezoelectric touch screen has following several respects significant advantage:
1, nonbinary response: the position that piezoelectric type touch screen not only can the perception contact, can also make response to this position amount of force, acting force variation characteristic, greatly improved the efficient of man-machine interaction.
2, material and the shape of contact object are not had specific (special) requirements: because piezoelectric touch screen is based on piezoelectric effect, no matter with the object of any material or any shape to the screen effect, can make response; And and unlike traditional capacitance or touch screens, requiring contact must be nonisulated plane or tip and hard object body.
3, good stability: because piezoelectric property is not limited to and the close contact that acts on the source, so can greatly reduce piezoelectricity screen and extraneous contacting with under piezoelectric attaching and the screen, increase its stability.
4, lower cost: the piezoelectricity screen is by the computing method location, and manufacturing process is simple.Arrange by rational matrix, can reach again the bearing accuracy that can compare favourably with capacitance plate.The piezoelectricity screen need not transparent material in addition, can select the starting material that performance is better, cost is lower.
If 5 is compound with flexible display screen and piezoelectric ceramic film, can form arbitrary deformation, distortion even folding flexible touch screen, namely display screen self-deformation, distortion in addition folding after still can judge the relevant informations such as force position, amount of force, acting force movement locus.
Existing piezoelectric touch screen is not also supported folding and plastic deformation.Simultaneously, because piezoelectric touch screen is a kind of new-type man-machine interactive, touch accurate perception contact position information or touch size information, but piezoelectric touch screen still has a lot of new functions not found and excavate out by the technician, such as: when finger or other any contactant (electric conductor, electrical insulator all can), touch screen the surface or lift the moment of leaving screen surfaces, the electric charge formation speed on piezoelectric ceramics surface is different with disappearance speed near the contact, be the faster then electric charge of the speed of touch action generate or the speed that disappears faster, the slower then electric charge of the speed of touch action generate or the speed that disappears slower.The utility model is found the speed that this electric charge generates or disappears based on great many of experiments, also can characterize with the variation of the detected voltage in piezoelectric ceramics surface, and namely rising edge and the negative edge with voltage waveform characterizes.Based on the essential characteristic that above-mentioned electric charge generates, the piezoelectricity touch screen of this patent has been given new use function.Except by the detection of the position of described charge generation, size is judged contact position and the amount of force function, the speed that can also detect the electric charge formation speed is simultaneously also calculated, obtain the information of further described acting force movement locus relevant information, acting force pace of change and speed and swiping action speed information etc., thereby realize more accurate and more real interactive capability.
Summary of the invention
But the utility model proposes the piezoelectric touch screen that still can work after a kind of collapsible plastic deformation and the distortion, is the three dimensionality piezoelectric touch screen that a kind of back attaches the array piezoelectric membrane.Not only the advantage of the touch-screens such as current collection appearance, resistance also has the inducing function to press degree, makes man-machine interaction freely convenient.
But 1, the piezoelectric touch screen of collapsible plastic deformation, this piezoelectric touch screen comprises substrate (display screen panel), piezoelectric membrane, top electrode and bottom electrode, wherein, the flexible base, board (display screen panel) of deformation for occuring in described substrate, flexible base, board is positioned in the framework of coupling, the back side of flexible base, board is bonded with top electrode, piezoelectric membrane, bottom electrode successively, and top electrode and bottom electrode are divided piezoelectric membrane in the zone that forms array.
The polarised direction of described piezoelectric membrane is parallel to the film normal direction.
It is quadrate array, rectangular array, regular hexagon array, Triangular array, circular array or fan-shaped array etc. that described top electrode and described bottom electrode are divided the array zone that forms with piezoelectric membrane.
When electrode design is comparatively complicated, can the charge signal of electrode be drawn by the circuit board that is arranged in the framework.
A kind of design proposal is: top electrode is identical with the surface size of piezoelectric membrane, and bottom electrode sticks on the lower surface of piezoelectric membrane, and is the array distribution of m * n, and wherein, m is the columns of bottom electrode, and n is the line number of bottom electrode, m 〉=2, n 〉=2.
Another kind of design proposal is: the strip bottom electrode that the m sheet is parallel to each other, vertically distributes is bonded in the lower surface of piezoelectric membrane, the n sheet is parallel to each other, the strip top electrode of cross direction profiles is bonded in the upper surface of piezoelectric membrane, piezoelectric membrane is divided formation rectangle or quadrate array, m 〉=2 wherein, n 〉=2, described top electrode turns over the lower surface that causes described piezoelectric membrane under the edge, forms under the top electrode and turns over the zone, in order to the circuit board in the connecting frame.
Described piezoelectric membrane can for the macromolecule piezoelectric membrane (vinylidene fluoride, PVDF) or photoetching composite piezoelectric material (PVDF and PZT particulate composite) film.
When piezoelectric membrane was the macromolecule piezoelectric membrane, the bonding mode of top electrode and flexible base, board can be common bonding mode (such as the AB glue bond) or welding manner or some adhesive curing mode.
When piezoelectric membrane was photoetching composite piezoelectric material film, the bonding mode of top electrode and flexible base, board can be sputter or common bonding mode.
But 2, the piezoelectric touch screen of the collapsible plastic deformation of another kind of structure: this piezoelectric touch screen comprises flexible base, board, the first piezoelectric membrane, middle electrode, the second piezoelectric membrane, top electrode and bottom electrode, wherein, flexible base, board is positioned in the framework of coupling, the back side of flexible base, board is bonded with top electrode, the first piezoelectric membrane, middle electrode, the second piezoelectric membrane and bottom electrode successively, and top electrode, middle electrode and bottom electrode are divided the zone that forms array with the first piezoelectric membrane and the second piezoelectric membrane.
The polarised direction of described the first piezoelectric membrane, the second piezoelectric membrane is parallel to the film normal direction.
When electrode design is comparatively complicated, can the charge signal of electrode be drawn by the circuit board that is arranged in the framework.
Described top electrode, middle electrode and bottom electrode are quadrate array, rectangular array, regular hexagon array, Triangular array, circular array or fan-shaped array etc. with the array zone of the first piezoelectric membrane and the second piezoelectric membrane division formation.
A kind of design proposal is: the m sheet is parallel to each other, the strip bottom electrode that vertically distributes is bonded in the lower surface of the second piezoelectric membrane, post middle electrode at the second piezoelectric membrane upper surface, post the first piezoelectric membrane at the middle electrode upper surface, the n sheet is parallel to each other, the strip top electrode of cross direction profiles is bonded in the upper surface of the first piezoelectric membrane, the first piezoelectric membrane and the second piezoelectric membrane measure-alike, the area of middle electrode is slightly less than the area of the first piezoelectric membrane (or second piezoelectric membrane), m 〉=2, n 〉=2, turn under the edge of top electrode to the second piezoelectric membrane lower surface, form under the top electrode and turn over the zone, turn under the edge of middle electrode to the second piezoelectric membrane lower surface, form under the middle electrode and turn over the zone, in order to the circuit board in the connecting frame.
Described the first piezoelectric membrane and the second piezoelectric membrane can for the macromolecule piezoelectric membrane (vinylidene fluoride, PVDF) or photoetching composite piezoelectric material (PVDF and PZT particulate composite) film.
When the first piezoelectric membrane and the second piezoelectric membrane were the macromolecule piezoelectric membrane, the bonding mode of top electrode and flexible base, board can be common bonding mode (such as the AB glue bond) or welding manner or some adhesive curing mode.
When the first piezoelectric membrane and the second piezoelectric membrane were photoetching composite piezoelectric material film, the bonding mode of top electrode and flexible base, board can be sputter or common bonding mode.
Principle of work of the present utility model is: when the front of described flexible base, board (display screen panel) is subject to perpendicular to the acting force on described flexible base, board surface, described flexible base, board will occur with described force position (x, y), described amount of force (F), the touching of described acting force or lift the relevant small amplitude flexural deformation of speed, described acting force glide direction or sliding speed on flexible base, board.Described distortion makes the piezoelectric membrane (be first piezoelectric membrane and second piezoelectric membrane for structure 2) at described flexible base, board back that strain perpendicular to described flexible base, board normal direction occur.Because piezoelectric effect, described piezoelectric membrane will be parallel to described flexible base, board normal direction generation electric field, and produce electric charge at the described electrode on described piezoelectric membrane surface.By contact position (x is judged in the position of described charge generation, the detection of size, y) and outside amount of force (F) function, the speed that can also detect the electric charge formation speed is simultaneously also calculated, obtain the information of further described acting force movement locus relevant information, acting force pace of change and speed and swiping action speed information etc., thereby realize more accurate and more real interactive capability.
Described flexible base, board, electrode and piezoelectric membrane can arbitrary deformations, distortion even collapsible, do not affect flexible screen and normally use, and form flexible display screen.Distortion, distortion in addition folding after screen still can obtain the relevant information such as described force position, described amount of force, described acting force movement locus.
Described top electrode and described bottom electrode are opaque electrode (such as aluminium electrode, silver electrode or copper electrode etc.) or transparency electrode.
Described flexible base, board is that display screen panel can be Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen.
The beneficial effects of the utility model are: piezoelectric touch screen can arbitrary deformation, distortion even folding, still can work, can with flexible Organic Light Emitting Diode (the Organic Light-Emitting Diode of present a new generation, OLED) display screen is good fit, and the utility model still can obtain the information such as force position, amount of force, acting force movement locus in distortion, distortion even after folding.This piezoelectric touch screen structure has novelty and cost is low, excellent performance, has the market competitiveness.
Description of drawings
Fig. 1 is the sectional view of the utility model embodiment 1;
Fig. 2 is the utility model embodiment 1 output end voltage signal;
Fig. 3 is that the utility model embodiment 1 host computer is received hum pattern;
Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of the utility model embodiment 1;
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of the utility model embodiment 2;
Fig. 6 (a), Fig. 6 (b) and Fig. 6 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of the utility model embodiment 3;
Fig. 7 (a) and Fig. 7 (b) are respectively the stereographic map (concealing framework) of the utility model embodiment 4, the stereographic map (concealing framework) after the plastic deformation.
Number in the figure:
The 1-framework; 2-flexible base, board (display screen panel); The 3-top electrode; The 4-piezoelectric membrane; 4a-the first piezoelectric membrane; 4b-the second piezoelectric membrane; The 5-bottom electrode; The 6-adhesive glue; Turn over the zone under the 7-top electrode; The 8-middle electrode; Turn over the zone under the 9-middle electrode.
Embodiment
The following examples can make those skilled in the art more fully understand the utility model, but limit never in any form the utility model.
Fig. 1 is the sectional view of present embodiment, and Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of present embodiment.Piezoelectric touch screen comprises flexible base, board 2, piezoelectric membrane 4, top electrode 3 and bottom electrode 5, wherein:
Be that square piezoelectric membrane 4 downsides of 54mm * 54mm, thickness 0.1mm post 93 * 3 square Copper Foil bottom electrodes 5 that distribute in size, the size of Copper Foil bottom electrode 5 is 10mm * 10mm, spacing 5mm, thickness 0.07mm; There is size to be the square Copper Foil top electrode 3 of 54mm * 54mm, thickness 0.07mm at piezoelectric membrane 4 upsides.Top electrode 3 is sticking mutually by adhesive glue 6 and flexible base, board 2.
Flexible base, board 2 is positioned in the framework 1 of coupling, piezoelectric membrane is the PVDF piezoelectric membrane, flexible base, board 2 is the PVC material substrate, flexible base, board 2 can adopt the OLED display screen in actual applications, the PVC material substrate is close with the OLED display screen because of mechanical property, replaces the OLED display screen so choose the PVC material substrate in the present embodiment.
When the front of described flexible base, board 2 is subject to acting force, can produce in the relevant position flexural deformation, then make this position piezoelectric membrane produce strain, because piezoelectric effect, can produce electric charge on the top electrode on piezoelectric membrane surface (3) and the bottom electrode (5), top electrode 3 leads to charge signal in the external test circuitry by lead-in wire with bottom electrode 5.
Fig. 2 is the voltage-time curve after the charge signal of piezoelectric membrane generation amplifies via elementary operational amplifier.Wherein ordinate is amplifier out voltage (millivolt), and horizontal ordinate is time (microsecond).Fig. 2 has reflected the monolithic piezoelectric film in the unit scan period because the outside electric charge of generation and the relation of time of pressing.Based on the essential characteristic that above-mentioned electric charge generates, the piezoelectricity touch screen of this patent has been given new use function.Except by the detection of the position of described charge generation, size is judged contact position and the amount of force function, the speed that can also detect the electric charge formation speed is simultaneously also calculated, obtain the information of further described acting force movement locus relevant information, acting force pace of change and speed and swiping action speed information etc., thereby realize more accurate and more real interactive capability.Fig. 3 is after the charge signal of piezoelectric membrane generation is processed via external circuit, single-chip microcomputer etc., finally is delivered to the digital signal-time curve of PC.Wherein ordinate is the digital signal (0-255,8) after the analog to digital conversion, and horizontal ordinate is time (second).Fig. 3 has reacted the monolithic piezoelectric film in a plurality of scan periods because the outside electric charge of generation and the real-time relation of time of pressing.Lower protuberance is divided into the response when screen applied external force, and upper convex portion is divided into the response when removing external force.Fig. 3 is through becoming analog signal conversion after the digital signal, applies moment and external force is withdrawn moment in external force, and it is more obvious and clear that the pace of change of this external force shows.External force touch screen or to withdraw the speed of screen faster, then the waveform of lower convex portion and epirelief part is steeper among Fig. 3, and the peak is more sharp-pointed.
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of the utility model embodiment 2.Piezoelectric touch screen comprises flexible base, board 2, piezoelectric membrane 4, top electrode 3 and bottom electrode 5, wherein:
Be that square piezoelectric membrane 4 downsides of 54mm*54mm, thickness 0.1mm post 20 rectangle Copper Foil bottom electrodes 5 that are parallel to each other, vertically distribute in size, the size of Copper Foil bottom electrode 5 is 54mm*2mm, spacing 0.5mm, thickness 0.07mm; Piezoelectric membrane 4 upsides post 20 be parallel to each other, the rectangle Copper Foil top electrode 3 of cross direction profiles, the size of Copper Foil top electrode 3 is 54mm*2mm, spacing 0.5mm, thickness 0.07mm, and turn under the edge with Copper Foil top electrode 3, form and turn over zone 7 under the top electrode, in order to the circuit board in the connecting frame 1.Top electrode 3 is sticking mutually by adhesive glue 6 and flexible base, board (display screen panel) 2.
Flexible base, board 2 is positioned in the framework 1, is provided with circuit board in the framework 1, and this circuit board is drawn the charge signal on 40 copper foil electrodes.
Fig. 6 (a), Fig. 6 (b) and Fig. 6 (c) are respectively upward view (concealing framework), stereographic map (concealing framework) and the explosive view (concealing framework) of present embodiment.Piezoelectric touch screen comprises flexible base, board 2, the first piezoelectric membrane 4a, middle electrode 8, the second piezoelectric membrane 4b, top electrode 3 and bottom electrode 5.The back side of flexible base, board is bonded with top electrode 3, the first piezoelectric membrane 4a, middle electrode 8, the second piezoelectric membrane 4b and bottom electrode 5 successively, wherein:
Be that square the second piezoelectric membrane 4b downside of 54mm*54mm, thickness 0.1mm posts 20 rectangle Copper Foil bottom electrodes 5 that are parallel to each other, vertically distribute in size, the size of Copper Foil bottom electrode 5 is 54mm*2mm, spacing 0.5mm, thickness 0.07mm; Stick size at the second piezoelectric membrane 4b upside and be the rectangle Copper Foil middle electrode 8 of 52mm*50mm, thickness 0.07mm, and turn under the edge with Copper Foil middle electrode 8 to the lower surface of the second piezoelectric membrane 4b, form and turn over zone 9 under the middle electrode, in order to the circuit board in the connecting frame 1; Post size at Copper Foil middle electrode 8 upsides and be square the first piezoelectric membrane 4a of 54mm*54mm, thickness 0.1mm; The first piezoelectric membrane 4a upside post 20 be parallel to each other, the rectangle Copper Foil top electrode 3 of cross direction profiles, the size of Copper Foil top electrode 3 is 52mm*2mm, spacing 0.5mm, thickness 0.07mm, and turn over the lower surface that causes the second piezoelectric membrane 4b under the edge with Copper Foil top electrode 3, form and turn over zone 7 under the top electrode, in order to the circuit board in the connecting frame 1.Top electrode 3 sticks on flexible base, board 2 by adhesive glue 6.
Flexible base, board 2 is Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen, display screen is positioned in the framework 1 of coupling, is provided with circuit board in the framework 1, and this circuit board is passed to cell phone mainboard with the charge signal on the electrode.
Piezoelectric touch screen comprises flexible base, board 2, the first piezoelectric membrane 4a, middle electrode 8, the second piezoelectric membrane 4b, top electrode 3 and bottom electrode 5.The back side of flexible base, board is bonded with top electrode 3, the first piezoelectric membrane 4a, middle electrode 8, the second piezoelectric membrane 4b and bottom electrode 5 successively.
Be that square the second piezoelectric membrane 4b downside of 54mm*54mm, thickness 0.1mm posts 20 rectangle Copper Foil bottom electrodes 5 that are parallel to each other, vertically distribute in size, the size of Copper Foil bottom electrode 5 is 54mm*2mm, spacing 0.5mm, thickness 0.07mm; Post size at the second piezoelectric membrane 4b upside and be the rectangle Copper Foil middle electrode 8 of 52mm*50mm, thickness 0.07mm, and turn under the edge with Copper Foil middle electrode 8, form and turn over zone 9 under the middle electrode, in order to the circuit board in the connecting frame; Post size at Copper Foil middle electrode 8 upsides and be square the first piezoelectric membrane 4a of 54mm*54mm, thickness 0.1mm; The first piezoelectric membrane 4a upside post 20 be parallel to each other, the rectangle Copper Foil top electrode 3 of cross direction profiles, the size of Copper Foil top electrode 3 is 52mm*2mm, spacing 0.5mm, thickness 0.07mm, and turn under the edge with Copper Foil top electrode 3, form and turn over zone 7 under the top electrode, in order to the circuit board in the connecting frame.It is on the flexible base, board 2 of 0.2mm that top electrode 3 sticks at thickness by adhesive glue 6.
Piezoelectric membrane is the PVDF piezoelectric membrane, and flexible base, board 2 is the PVC material substrate, and Fig. 7 (a) and Fig. 7 (b) are respectively the stereographic map (concealing framework) of present embodiment, the stereographic map (concealing framework) after the plastic deformation.
The above; it only is the better embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (13)
1. but the piezoelectric touch screen of collapsible plastic deformation, it is characterized in that: piezoelectric touch screen comprises substrate, piezoelectric membrane (4), top electrode (3) and bottom electrode (5), wherein, the flexible base, board (2) of deformation for occuring in described substrate, flexible base, board (2) is positioned in the framework (1), the back side of flexible base, board (2) is followed successively by top electrode (3), piezoelectric membrane (4) and bottom electrode (5), and top electrode (3) is divided piezoelectric membrane (4) with bottom electrode (5) and formed the array zone.
2. piezoelectric touch screen according to claim 1 is characterized in that: it is quadrate array, rectangular array, regular hexagon array, Triangular array, circular array or fan-shaped array that described top electrode (3) is divided the array region that forms with described bottom electrode (5) with piezoelectric membrane (4).
3. piezoelectric touch screen according to claim 1, it is characterized in that: top electrode (3) is identical with the surface size of piezoelectric membrane (4), bottom electrode (5) sticks on the lower surface of piezoelectric membrane (4), and the array distribution that is m * n, wherein, m is the columns of bottom electrode (5), and n is the line number of bottom electrode (5), m 〉=2, n 〉=2.
4. piezoelectric touch screen according to claim 1, it is characterized in that: the strip bottom electrode (5) that the m sheet is parallel to each other, vertically distributes is bonded in the lower surface of piezoelectric membrane (4), the upper surface that the n sheet is parallel to each other, the strip top electrode of cross direction profiles (3) is bonded in piezoelectric membrane (4), piezoelectric membrane (4) is divided formation rectangle or quadrate array, wherein, m 〉=2, n 〉=2.
5. piezoelectric touch screen according to claim 4, it is characterized in that: described top electrode (3) turns over the lower surface that causes described piezoelectric membrane under the edge, forms under the top electrode and turns over zone (7).
6. piezoelectric touch screen according to claim 1, it is characterized in that: described piezoelectric membrane (4) is macromolecule piezoelectric membrane or photoetching composite piezoelectric material film.
7. piezoelectric touch screen according to claim 1, it is characterized in that: described flexible base, board (2) is organic light-emitting diode (OLED) display screen.
8. collapsible, but the piezoelectric touch screen of plastic deformation, it is characterized in that: piezoelectric touch screen comprises flexible base, board (2), the first piezoelectric membrane (4a), middle electrode, the second piezoelectric membrane (4b), top electrode (3) and bottom electrode (5), wherein, flexible base, board (2) is positioned in the framework (1), the back side of flexible base, board (2) is followed successively by top electrode (3), the first piezoelectric membrane (4a), middle electrode (8), the second piezoelectric membrane (4b) and bottom electrode (5), described top electrode (3), middle electrode (8) and bottom electrode (5) are divided the zone that forms array with the first piezoelectric membrane (4a) and the second piezoelectric membrane (4b).
9. piezoelectric touch screen according to claim 8 is characterized in that: it is quadrate array, rectangular array, regular hexagon array, Triangular array, circular array or fan-shaped array that described top electrode (3), middle electrode (8) and bottom electrode (5) are divided the array region that forms with the first piezoelectric membrane (4a) and the second piezoelectric membrane (4b).
10. piezoelectric touch screen according to claim 8, it is characterized in that: the strip bottom electrode (5) that the m sheet is parallel to each other, vertically distributes is bonded in the lower surface of the second piezoelectric membrane (4b), the upper surface that the n sheet is parallel to each other, the strip top electrode of cross direction profiles (3) is bonded in the first piezoelectric membrane (4a), the first piezoelectric membrane (4a) and the second piezoelectric membrane (4b) measure-alike, the area of middle electrode (8) is slightly less than the area of the first piezoelectric membrane (4a), m 〉=2, n 〉=2.
11. piezoelectric touch screen according to claim 10, it is characterized in that: described top electrode (3) turns over the lower surface that causes described the second piezoelectric membrane (4b) under the edge, form under the top electrode and turn over zone (7), turn under the edge of described middle electrode (8) to the second piezoelectric membrane (4b) lower surface, form under the middle electrode and turn over zone (9).
12. piezoelectric touch screen according to claim 8 is characterized in that: described the first piezoelectric membrane (4a) and the second piezoelectric membrane (4b) are macromolecule piezoelectric membrane or photoetching composite piezoelectric material film.
13. piezoelectric touch screen according to claim 8 is characterized in that: described flexible base, board (2) is organic light-emitting diode (OLED) display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120386272 CN202711198U (en) | 2011-10-12 | 2011-10-12 | Piezoelectric touch screen capable of being folded and flexibly deformed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120386272 CN202711198U (en) | 2011-10-12 | 2011-10-12 | Piezoelectric touch screen capable of being folded and flexibly deformed |
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| CN202711198U true CN202711198U (en) | 2013-01-30 |
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| CN 201120386272 Expired - Lifetime CN202711198U (en) | 2011-10-12 | 2011-10-12 | Piezoelectric touch screen capable of being folded and flexibly deformed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592779A (en) * | 2018-04-08 | 2018-09-28 | 大连理工大学 | A kind of combined type curvature sensor based on piezoelectric membrane |
| CN109804642A (en) * | 2016-10-06 | 2019-05-24 | 微软技术许可有限责任公司 | Loudspeaker arrangement |
-
2011
- 2011-10-12 CN CN 201120386272 patent/CN202711198U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109804642A (en) * | 2016-10-06 | 2019-05-24 | 微软技术许可有限责任公司 | Loudspeaker arrangement |
| CN109804642B (en) * | 2016-10-06 | 2021-01-19 | 微软技术许可有限责任公司 | Loudspeaker arrangement |
| CN108592779A (en) * | 2018-04-08 | 2018-09-28 | 大连理工大学 | A kind of combined type curvature sensor based on piezoelectric membrane |
| CN108592779B (en) * | 2018-04-08 | 2019-06-21 | 大连理工大学 | A kind of combined type curvature sensor based on piezoelectric membrane |
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Granted publication date: 20130130 |