CN206388154U - Electronic equipment and its flying capacitor formula touch-screen - Google Patents
Electronic equipment and its flying capacitor formula touch-screen Download PDFInfo
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- CN206388154U CN206388154U CN201621098557.4U CN201621098557U CN206388154U CN 206388154 U CN206388154 U CN 206388154U CN 201621098557 U CN201621098557 U CN 201621098557U CN 206388154 U CN206388154 U CN 206388154U
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- touch
- flying capacitor
- screen
- capacitor formula
- suspension
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- 239000003990 capacitor Substances 0.000 title claims abstract description 28
- 239000000725 suspension Substances 0.000 claims abstract description 42
- 230000005684 electric field Effects 0.000 claims abstract description 30
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 238000007667 floating Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- -1 graphite Alkene Chemical class 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000013003 hot bending Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 229910021389 graphene Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- 238000007738 vacuum evaporation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Abstract
The utility model is related to a kind of electronic equipment and its flying capacitor formula touch-screen, flying capacitor formula touch-screen includes protection panels, capacitive sensing structure, suspension touch control electrode and the control IC that suspends, suspension control IC internal circuit, which is passed through after direct current, can produce AC signal, AC signal is transferred to suspension touch control electrode and produces variable electric field, the wavelength of the variable electric field of generation is more than more than 100 times of the size of suspension touch control electrode, variable electric field now is equivalent to quasi-electrostatic field, can be for detection conductor, and human body is inherently equivalent to conductor, when finger or palm enter variable electric field, variable electric field can change, control IC suspend by detecting the change that variable electric field is produced, position of touch point is detected with this, realize remote suspension touch control function.
Description
Technical field
The utility model is related to touch screen technology field, and more particularly to a kind of electronic equipment and its flying capacitor formula is touched
Screen.
Background technology
Capacitive touch screen is mainly used in smart mobile phone, tablet personal computer, vehicular touch screen etc. at present.Capacitance touch
The primary structure of screen has GG, GFF, PG, PFF etc., and most of capacitive touch screen realizes that touch controllable function has to finger and connect completely
Touch screen surface is touched, fraction capacitive touch screen can realize finger every do-nothing operation by the principle of self-capacitance, but every sky
Distance only only has 20mm or maximum to accomplish 50mm, it is impossible to really realize remote suspension touch control.
Utility model content
Based on this, it is necessary to set for above-mentioned technical problem there is provided a kind of electronics that can realize remote suspension touch control
Standby and its flying capacitor formula touch-screen.
A kind of flying capacitor formula touch-screen, including：
Protection panels, including visible area and the non-visible area around visible area setting；
Capacitive sensing structure, is arranged at the visible area of the protection panels；
Suspension touch control electrode, is arranged at the non-visible area of the protection panels；And
Suspend control IC, and the suspension controls IC to be electrically connected with the suspension touch control electrode, the interior of control IC that suspend
Portion's circuit, which is passed through after direct current, can produce AC signal, and the AC signal is transferred to the suspension touch control electrode, generation can
The wavelength of changed electric field is more than more than 100 times of the size of the suspension touch control electrode, the variable electric field be equivalent to quasi-electrostatic field with
For detecting conductor.
In one of the embodiments, the protection panels are in indent circular arc type or evagination circular arc type, the electric capacity sense
Structure is answered to be arranged at by tack coat in the protection panels.
In one of the embodiments, the non-visible area of the protection panels be outer convex, the protection panels can
Vision area is rectangle.
In one of the embodiments, the capacitive sensing structure includes multiple first conductive patterns and multiple second conductions
Pattern, first conductive pattern is set with the second conductive pattern mutually insulated, and multiple first conductive patterns are mutual
Insulation, multiple second conductive pattern mutually insulateds, first conductive pattern and second conductive pattern respectively with institute
State suspension touch control electrode mutually insulated.
In one of the embodiments, first conductive pattern is arranged at same plane with second conductive pattern,
First conductive pattern is electrically connected by first electrode lead with the control IC that suspends, and second conductive pattern passes through the
Two contact conductors are electrically connected with the control IC that suspends.
In one of the embodiments, the capacitive sensing structure includes the first conductive layer and the second conductive layer, described the
One conductive layer is located at Different Plane with second conductive layer, and first conductive layer is located at described protect with second conductive layer
Protection slab the same side or not homonymy, first conductive layer are electrically connected by first electrode lead with the control IC that suspends,
Second conductive layer is electrically connected by second electrode lead with the control IC that suspends.
In one of the embodiments, the conducting wire of the capacitive sensing structure is compliant conductive circuit, the flexibility
The material of conducting wire is CNT, metal grill, nano-silver thread or graphene.
In one of the embodiments, the protection panels include end to end four edges, and two of which side is mutually put down
Row is set, and two other side is arranged in parallel, and the suspension touch control electrode is provided with four edges.
A kind of electronic equipment, including：
Flying capacitor formula touch-screen as described in any of the above one；And
Display screen, the touch-screen is stacked with the display screen.
Above-mentioned flying capacitor formula touch-screen at least has advantages below：
Suspension control IC internal circuit, which is passed through after direct current, can produce AC signal, and AC signal is transferred to suspension touch control
Electrode produces variable electric field, and the wavelength of the variable electric field of generation is more than more than 100 times of the size of suspension touch control electrode, now can
Changed electric field is equivalent to quasi-electrostatic field, can be for detection conductor, and human body is inherently equivalent to conductor, when finger or palm enter
When entering variable electric field, variable electric field can be changed, and the control IC that suspends is detected by detecting the change that variable electric field is produced with this
To position of touch point, remote suspension touch control function is realized.
Brief description of the drawings
Fig. 1 is the front view of flying capacitor formula touch-screen in an embodiment；
Fig. 2 is the sectional view of flying capacitor formula touch-screen shown in Fig. 1；
Fig. 3 is when the electric field change schematic diagram of the touch-screen of flying capacitor formula shown in finger close to Fig. 1；
Fig. 4 is the structural representation of protection panels in Fig. 2；
Fig. 5 is the structural representation at another visual angle of protection panels shown in Fig. 4.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be implemented with being much different from other manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model intension, therefore the utility model is not by following public affairs
The limitation for the specific implementation opened.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Each technical characteristic of embodiment described above
Can arbitrarily it be combined, to make description succinct, not to all possible combination of each technical characteristic in above-described embodiment
All it is described, as long as however, the combination of these technical characteristics is all considered to be the model of this specification record in the absence of contradiction
Enclose.
Electronic equipment in one embodiment, including a flying capacitor formula touch-screen 10 (as shown in Figure 1) and display screen, hang
Floating capacitive touch screen 10 is stacked with display screen.The flying capacitor formula touch-screen 10 can realize remote suspension touch control,
The distance of such as finger touch is improved to 12cm, and the distance of palm touch-control is improved to 20cm.Display screen is used to show word, figure
The various information such as shape, image, animation, market, video, video signal.
Display screen can be liquid crystal display mode group, for example, can be TFT liquid crystal displays module or IPS liquid crystals
Show module, or OLED display.
Specifically, also referring to Fig. 1 to Fig. 3, flying capacitor formula touch-screen 10 includes protection panels 100, capacitive sensing
Structure 200, suspension touch control electrode 300 and the control IC400 that suspends.
Protection panels 100 include visible area and the non-visible area set around visible area.Protection panels 100 can be for 2D's
Flat panel, or be made on the basis of 2D protection panels 100 of techniques such as hot bending or injection moldings
3D curved surface panels.For example, protection panels 100 can be in indent circular arc type or evagination circular arc type.
Also referring to Fig. 4 and Fig. 5, protection panels 100 are 3D curved surface panels.For example, can be by hot bending equipment, not
With under the tool of model, adjustment pressure, temperature, time, 3D curved surfaces panel of different shapes, its bending height, curvature half are obtained
The product parameters such as footpath, angle of bend can pass through processing procedure control.
The parameter of 3D curved surface panels can be 2.8 cun~15 cun of size.Angle of bend can reach 75 °, and bending height is reachable
20mm, radius of curvature R can meet the requirement of common 3D curved surface panels up to 80mm.
Protection panels 100 can also be curved surface composite plate.Curved surface composite plate is to first pass through the composite plate that extrusion forming is obtained,
Then curved surface composite plate is obtained by hot bending.
Protection panels 100 can also be curved surface IML (In Molding Label, in-mode inserts injection).Curved surface IML is logical
Injection molding is crossed, by film, plastic particles, ink by certain temperature, pressure and time, is obtained with IML of different shapes
Product.
Certainly, in other embodiments, protection panels 100 can also be that non-visible area is outer convex, visible area
For rectangular structure, referred to as 2.5D cover sheets.
Capacitive sensing structure 200 is arranged at the visible area of protection panels 100.Capacitive sensing structure 200 can be with COP,
PRT or the induction structure that glass is base material.Capacitive sensing structure 200, which is used to realize, works as finger or the direct touch-control of palm to suspension
During capacitive touch screen 10, touch is detected and positioned.Specifically, capacitive sensing structure 200 passes through tack coat 500
It is arranged in protection panels 100.
Specific in present embodiment, tack coat 500 can be formed by solid-state pressure sensitive adhesive, can also be by liquid glue shape
Into with excellent insulating effect and good optics permeability.Tack coat 500 can make capacitive sensing structure 200 and protection
Panel 100 is fitted by way of frame is pasted, and capacitive sensing structure 200 and protection panels 100 can also be made to pass through the side that fits entirely
Formula is fitted.
Referring to Fig. 1, specific in present embodiment, flying capacitor formula touch-screen 10 is single-surface single-layer structure.Electricity
Holding induction structure 200 includes multiple first conductive patterns 210 and multiple second conductive patterns 220, the first conductive pattern 210 and the
The mutually insulated of two conductive pattern 220 is set.Multiple mutually insulateds of first conductive pattern 210, multiple second conductive patterns 220 are mutual
Insulation.
First conductive pattern 210 and the second conductive pattern 220 are arranged at same plane, multiple shapes of first conductive pattern 210
Into induction structure, the multiple formation of second conductive pattern 220 driving structures.First conductive pattern 210 passes through first electrode lead 230
Control IC400 is electrically connected with suspending, and the second conductive pattern 220 is electrically connected by second electrode lead 240 with the control IC400 that suspends
Connect.
Certainly, in other embodiments, flying capacitor formula touch-screen can also be double-layer and double-side or dual-layer, single-sided
Structure.Now capacitive sensing structure includes the first conductive layer and the second conductive layer, and the first conductive layer and the second conductive layer are located at not
It is coplanar.First conductive layer and the second conductive layer are located at the same side of protection panels or not homonymy, and the first conductive layer passes through the
One contact conductor is electrically connected with the control IC that suspends, and the second conductive layer is electrically connected by second electrode lead with the control IC that suspends.
The conducting wire of capacitive sensing structure 200 is compliant conductive circuit, and the material of compliant conductive circuit can be received for carbon
Mitron, metal grill, nano-silver thread or graphene etc., to realize that capacitive sensing structure 200 has stronger bending.Example
Number of times resistant to bending such as compliant conductive circuit can be improved to more than 1200 times.The technologies such as magnetron sputtering, vacuum evaporation can be passed through
Capacitive sensing structure 200 is obtained, compliant conductive circuit is obtained using the technology such as radium-shine entirely.
Compliant conductive circuit is also equipped with higher luminous ray permeability, by the control IC400 that suspends to capacitive sensing knot
The compliant conductive circuit of structure 200 sends signal, carries out signal to sentence fixed sum data processing, Ke Yishi by the control IC400 that suspends
Other flying capacitor formula touch-screen 10 is with the presence or absence of the specific coordinate position for directly touching and directly touching.
Suspension touch control electrode 300 is arranged at the non-visible area of protection panels 100.Specifically, protection panels 100 include head and the tail
Connected four edges, two of which side is arranged in parallel, and two other side is arranged in parallel.It is provided with four edges outstanding
Floating touch control electrode 300.Length, area of suspension touch control electrode 300 on four edges etc. allow a range of difference.Suspend and touch
Control electrode 300 can be directly arranged at the non-visible area of protection panels 100, be generally aligned in the same plane with capacitive sensing structure 200.
The surface of protection panels 100 can not be directly arranged at, but is separately set on a bearing substrate, is touched as long as ensureing to suspend
Control non-visible area of the correspondence of electrode 300 positioned at protection panels 100.Suspension touch control electrode 300 can pass through in various structures
A variety of conductive materials are realized.
The control IC400 that suspends is electrically connected with suspension touch control electrode 300 and capacitive sensing structure 200.Suspend control IC400
It is main to utilize electric field suspension technology.Wherein, suspension control IC400 internal circuit, which is passed through after direct current, can produce AC signal,
AC signal is transferred to suspension touch control electrode 300, the variable electric field (void in such as Fig. 2 and Fig. 3 that suspension touch control electrode 300 is produced
Shown in line part) wavelength be much larger than suspension touch control electrode 300 size, now variable electric field be equivalent to quasi-electrostatic field be used for examine
Survey conductor (such as the hand in Fig. 3).For example, the wavelength of the variable electric field produced is more than the 100 of the size of suspension touch control electrode 300
More than times, the wavelength for being considered as variable electric field is much larger than the size of suspension touch control electrode 300.
Human body is inherently equivalent to conductor, and when finger or palm enter variable electric field, distortion occurs for variable electric field, suspends
Control IC400 is detected by the change of variable electric field, is realized test position point with this and is carried out feedback signal, is realized and is suspended
Touch controllable function.For example, can realize that gloves are operated, automatically waken up, location tracking, touch key-press, to swing gesture, rotation touch-control etc. outstanding
Floating touch controllable function, increases the new experience of user, the new field of developing man-machine interaction mode.
Above-mentioned flying capacitor formula touch-screen 10 at least has advantages below：
Suspension control IC400 internal circuit, which is passed through after direct current, can produce AC signal, and AC signal is transferred to suspension
Touch control electrode 300 produces variable electric field, and the wavelength of the variable electric field of generation is much larger than the size of suspension touch control electrode 300, now
Variable electric field be equivalent to quasi-electrostatic field, can be for detection conductor, and human body is inherently equivalent to conductor, when finger or hand
When the palm enters variable electric field, variable electric field can change, and suspend and control IC400 by detecting the change that variable electric field is produced,
Position of touch point is detected with this, remote suspension touch control function is realized.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (9)
1. a kind of flying capacitor formula touch-screen, it is characterised in that including：
Protection panels, including visible area and the non-visible area around visible area setting；
Capacitive sensing structure, is arranged at the visible area of the protection panels；
Suspension touch control electrode, is arranged at the non-visible area of the protection panels；And
Suspend control IC, and the suspension controls IC to be electrically connected with the suspension touch control electrode, the inside electricity of the control IC that suspends
Road, which is passed through after direct current, can produce AC signal, and the AC signal is transferred to the suspension touch control electrode, generation can power transformation
Wavelength be more than more than 100 times of the size of the suspension touch control electrode, the variable electric field be equivalent to quasi-electrostatic field for
Detect conductor.
2. flying capacitor formula touch-screen according to claim 1, it is characterised in that the protection panels are in indent circular arc type
Or evagination circular arc type, the capacitive sensing structure is arranged in the protection panels by tack coat.
3. flying capacitor formula touch-screen according to claim 1, it is characterised in that the non-visible area of the protection panels is
Outer convex, the visible area of the protection panels is rectangle.
4. flying capacitor formula touch-screen according to claim 1, it is characterised in that the capacitive sensing structure includes multiple
First conductive pattern and multiple second conductive patterns, first conductive pattern are set with the second conductive pattern mutually insulated
Put, multiple first conductive pattern mutually insulateds, multiple second conductive pattern mutually insulateds, first conductive pattern
And second conductive pattern respectively with the suspension touch control electrode mutually insulated.
5. flying capacitor formula touch-screen according to claim 4, it is characterised in that first conductive pattern and described the
Two conductive patterns are arranged at same plane, and first conductive pattern is electrically connected by first electrode lead with the control IC that suspends
Connect, second conductive pattern is electrically connected by second electrode lead with the control IC that suspends.
6. flying capacitor formula touch-screen according to claim 1, it is characterised in that the capacitive sensing structure includes first
Conductive layer and the second conductive layer, first conductive layer are located at Different Plane, first conductive layer with second conductive layer
It is located at described protection panels the same side or not homonymy with second conductive layer, first conductive layer is drawn by first electrode
Line is electrically connected with the control IC that suspends, and second conductive layer is electrically connected by second electrode lead with the control IC that suspends
Connect.
7. flying capacitor formula touch-screen according to claim 1, it is characterised in that the conduction of the capacitive sensing structure
Circuit is compliant conductive circuit, and the material of the compliant conductive circuit is CNT, metal grill, nano-silver thread or graphite
Alkene.
8. flying capacitor formula touch-screen according to claim 1, it is characterised in that the protection panels include joining end to end
Four edges, two of which side is arranged in parallel, and two other side is arranged in parallel, is provided with four edges described outstanding
Floating touch control electrode.
9. a kind of electronic equipment, it is characterised in that including：
Flying capacitor formula touch-screen as claimed in any of claims 1 to 8 in one of claims；And
Display screen, the touch-screen is stacked with the display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098557.4U CN206388154U (en) | 2016-09-30 | 2016-09-30 | Electronic equipment and its flying capacitor formula touch-screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098557.4U CN206388154U (en) | 2016-09-30 | 2016-09-30 | Electronic equipment and its flying capacitor formula touch-screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206388154U true CN206388154U (en) | 2017-08-08 |
Family
ID=59487144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621098557.4U Active CN206388154U (en) | 2016-09-30 | 2016-09-30 | Electronic equipment and its flying capacitor formula touch-screen |
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| Country | Link |
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| CN (1) | CN206388154U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371685A (en) * | 2016-09-30 | 2017-02-01 | 苏州欧菲光科技有限公司 | Electronic equipment and suspended capacitive touch screen thereof |
| TWI617962B (en) * | 2017-08-28 | 2018-03-11 | 國立清華大學 | Flexible sensor |
| CN109814758A (en) * | 2019-01-30 | 2019-05-28 | 合肥鑫晟光电科技有限公司 | Touch substrate, touch driving method and electronic device |
| CN114185209A (en) * | 2022-02-17 | 2022-03-15 | 成都中电熊猫显示科技有限公司 | Array substrate, display panel and display device |
-
2016
- 2016-09-30 CN CN201621098557.4U patent/CN206388154U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371685A (en) * | 2016-09-30 | 2017-02-01 | 苏州欧菲光科技有限公司 | Electronic equipment and suspended capacitive touch screen thereof |
| TWI617962B (en) * | 2017-08-28 | 2018-03-11 | 國立清華大學 | Flexible sensor |
| CN109814758A (en) * | 2019-01-30 | 2019-05-28 | 合肥鑫晟光电科技有限公司 | Touch substrate, touch driving method and electronic device |
| WO2020156401A1 (en) * | 2019-01-30 | 2020-08-06 | 京东方科技集团股份有限公司 | Touch substrate, touch driving method, and electronic device |
| CN109814758B (en) * | 2019-01-30 | 2021-05-18 | 合肥鑫晟光电科技有限公司 | Touch substrate, touch driving method and electronic device |
| US11287924B2 (en) | 2019-01-30 | 2022-03-29 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Touch substrate, touch driving method and electronic device |
| CN114185209A (en) * | 2022-02-17 | 2022-03-15 | 成都中电熊猫显示科技有限公司 | Array substrate, display panel and display device |
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Effective date of registration: 20210421 Address after: 231323 Building 1, precision electronics industrial park, Hangbu Town, Shucheng County, Lu'an City, Anhui Province Patentee after: Anhui jingzhuo optical display technology Co.,Ltd. Address before: 215143 Jiangsu city of Suzhou province Xiangcheng District Huang Dai Zhen Kang Yang Road No. 233 Patentee before: Suzhou OFilm Tech. Co.,Ltd. |