CN210402269U - Vibration feedback structure of touch pad and electronic equipment - Google Patents
Vibration feedback structure of touch pad and electronic equipment Download PDFInfo
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- CN210402269U CN210402269U CN201921806385.5U CN201921806385U CN210402269U CN 210402269 U CN210402269 U CN 210402269U CN 201921806385 U CN201921806385 U CN 201921806385U CN 210402269 U CN210402269 U CN 210402269U
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- 239000002184 metal Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The utility model discloses a vibration feedback structure and electronic equipment of touch-control board, wherein, the vibration feedback structure of touch-control board includes support piece, piezoelectricity vibration piece and touch-control board, and the touch-control board is along the direction swing joint in support piece of predetermineeing with the face parallel of touch-control board, and the vibration mode of piezoelectricity vibration piece is the thickness shear vibration, and piezoelectricity vibration piece is connected with a face that the touch-control face was kept away from to the touch-control board for the vibration through piezoelectricity vibration piece drives the touch-control board and vibrates along predetermineeing the direction. The utility model provides a among the technical scheme piezoelectric vibration piece can produce the thickness shear vibration after the circular telegram, and the thickness shear vibration direction of piezoelectric vibration piece is parallel with the face of touch-control board to go to drive the touch-control board through piezoelectric vibration piece and follow the direction vibration of predetermineeing parallel with the face, in order to reach touch-control feedback, because the vibration direction of the touch-control board of this application is parallel with the face, planar removal is done to whole structure, so relatively even vibration effect is realized easily to this kind of vibration mode.
Description
Technical Field
The utility model relates to an electronic equipment field especially relates to vibration feedback structure and electronic equipment of touch-control panel.
Background
Electronic devices such as mobile phones, tablet computers, and notebook computers with flat touch are provided with a touch pad, and the touch pad generally has a touch feedback function. The traditional touch control panel is provided with metal keys, and the metal keys are utilized to push corresponding points of the touch control panel to vibrate along a direction perpendicular to the panel surface of the touch control panel, so that touch control feedback is realized. However, when the corresponding point of the touch pad is pushed by the metal key to vibrate, the vibration near the corresponding point is strong, and the vibration at other positions is weak, so that the vibration of the whole touch pad is not uniform.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vibration feedback structure and electronic equipment of touch-control panel aims at solving traditional touch-control feedback structure and can cause the inhomogeneous problem of vibration of whole touch-control panel.
In a first aspect, the utility model provides a vibration feedback structure of touch-control panel, including support piece, piezoelectricity vibration piece and touch-control panel, the touch-control panel along with the parallel orientation of predetermineeing of the face of touch-control panel connect in support piece, the vibration mode of piezoelectricity vibration piece is thickness shear vibration, piezoelectricity vibration piece with the touch-control panel is kept away from a face of touch-control face and is connected, is used for passing through the vibration of piezoelectricity vibration piece drives the touch-control panel is followed predetermine the orientation vibration.
According to the technical scheme, the piezoelectric vibrating piece can generate thickness shear vibration after being electrified, and the thickness shear vibration direction of the piezoelectric vibrating piece is parallel to the surface of the touch control plate, so that the touch control plate is driven to vibrate along the preset direction parallel to the surface through the piezoelectric vibrating piece, and touch control feedback is achieved. For do the vibration through certain point that promotes the touch-control board, because the vibration direction of the touch-control board of this application is parallel with the face, planar removal is done to whole structure, so this kind of vibration mode realizes more even vibration effect easily. Moreover, the piezoelectric vibrating piece is used for replacing a metal key in the traditional touch pad, so that the whole thickness of the touch pad structure is favorably reduced.
In one embodiment, a side of the piezoelectric vibrator, which is away from the touch pad, is connected to the support. The piezoelectric vibrating piece is clamped and installed through the touch control plate and the supporting piece, and therefore firm installation of the piezoelectric vibrating piece is facilitated.
In one embodiment, the touch pad and the support member are both bonded to the piezoelectric vibrating element. The piezoelectric vibrating piece is arranged between the touch pad and the support piece in a bonding mode, and the installation mode of the piezoelectric vibrating piece is simpler than other installation modes.
In one embodiment, the supporting member is provided with a groove corresponding to the piezoelectric vibrating piece, and a portion of the piezoelectric vibrating piece close to the supporting member is arranged in the groove. Through set up the recess at support piece, locate the part of piezoelectricity vibrating piece in the recess, can further reduce the whole thickness of touch-control board structure like this.
In one embodiment, an elastic layer is disposed between the piezoelectric vibrator and the touch pad. By arranging the elastic layer, the vibration amplitude of the touch pad can be increased so as to meet the requirement of touch feedback.
In one embodiment, the piezoelectric vibrator includes a plurality of sub-vibrators spaced apart from each other along a circumference of the touch panel; or the piezoelectric vibrating piece extends along the periphery of the touch pad. The piezoelectric vibrating piece is designed along the periphery of the touch pad, so that the uniform vibration effect is realized, and the vibration amplitude of the touch pad meets the requirement of touch feedback.
In one embodiment, a surface of the touch panel, which is away from the touch surface, has four edge regions connected end to end, and the joint of any two adjacent edge regions is provided with one piezoelectric vibrating element. Four piezoelectric vibration pieces are correspondingly arranged at four corners of the touch control panel, so that the piezoelectric vibration pieces can be arranged at the minimum while a uniform vibration effect is realized.
In one embodiment, the piezoelectric vibrator includes a plurality of vibration layers stacked in a direction perpendicular to a plate surface of the touch panel. The piezoelectric vibrating piece is arranged to be of a multilayer structure, so that the piezoelectric vibrating piece can be driven by low voltage, and the vibration amplitude of the piezoelectric vibrating piece can be increased.
In one embodiment, the size of the piezoelectric vibrating piece in a direction perpendicular to the surface of the touch pad is 0.5mm to 2 mm. The size of piezoelectricity vibration piece in the orientation of the face of perpendicular to touch-control board is the thickness of piezoelectricity vibration piece promptly, the vibration range that piezoelectricity vibration piece can reach is relevant with the thickness of piezoelectricity vibration piece, this application sets up through the optimization to the thickness size of piezoelectricity vibration piece, the thickness that not only can avoid piezoelectricity vibration piece is too little, and lead to the relatively poor problem of touch-control feedback effect, the thickness that can also avoid piezoelectricity vibration piece is too big, and be unfavorable for reducing the whole thickness of touch-control panel structure, and cause the problem of cost waste.
In a second aspect, the present invention further provides an electronic device, which includes the vibration feedback structure of the touch pad in any one of the embodiments of the first aspect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vibration feedback structure of a touch panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the vibration feedback structure of the touch pad of FIG. 1;
FIG. 3 is a schematic diagram illustrating the operation of a piezoelectric vibrator in the vibration feedback structure of the touch panel shown in FIG. 2;
fig. 4 is a schematic structural diagram of a vibration feedback structure of a touch panel according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the specific embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Electronic devices such as mobile phones, tablet computers, and notebook computers with flat touch are provided with a touch pad, and the touch pad generally has a touch feedback function. The traditional touch control panel is provided with metal keys, and the metal keys are utilized to push corresponding points of the touch control panel to vibrate along a direction perpendicular to the panel surface of the touch control panel, so that touch control feedback is realized. However, when the corresponding point of the touch pad is pushed by the metal key to vibrate, the vibration near the corresponding point is strong, and the vibration at other positions is weak, so that the vibration of the whole touch pad is not uniform.
In view of the above problems, the present application provides a vibration feedback structure of a touch pad, which can be used for electronic devices with a touch interaction form, such as mobile phones, tablet computers, notebook computers, electronic readers, and remote controllers. As shown in fig. 1-3, the vibration feedback structure 100 of the touch pad includes a supporting member 1, a piezoelectric vibrating member 2, and a touch pad 3, wherein the touch pad 3 has a touch surface, a bottom surface far away from the touch surface, and a side surface connected between the touch surface and the bottom surface, the touch surface and the bottom surface are the surfaces of the touch pad 3, and the touch pad 3 is movably connected to the supporting member 1 along a predetermined direction parallel to the surface of the touch pad 3. The predetermined direction is a vibration direction of the desired touch pad 3, and the vibration direction of the touch pad 3 may be a single direction, for example, as shown in fig. 1, the touch pad 3 vibrates in a lateral direction, and the vibration direction of the touch pad 3 is indicated by a double-headed arrow in fig. 1. The vibration direction of the touch pad 3 can also be the whole board surface direction, for example, the bottom surfaces of the supporting member 1 and the touch pad 3 are opposite, and the supporting member 1 and the touch pad 3 are connected through an elastic member, so that the touch pad 3 is movably connected to the supporting member 1.
The preset direction is parallel to the surface of the touch pad 3, that is, the vibration direction of the touch pad 3 is parallel to the surface of the touch pad 3, so that the touch pad 3 moves in a plane. It should be noted that the two are parallel in this application, which means that the included angle between the two is 0 ° or approximately 0 °.
The vibration mode of the piezoelectric vibration member 2 is thickness shear vibration, and the piezoelectric vibration member 2 is connected with a panel surface of the touch panel 3 away from the touch surface, so as to drive the touch panel 3 to vibrate along a preset direction through the vibration of the piezoelectric vibration member 2. The piezoelectric vibrator 2 is disposed on the bottom surface of the touch panel 3, and as shown in fig. 3, when a current is applied to the piezoelectric vibrator 2, the piezoelectric vibrator 2 vibrates by using the piezoelectric effect of a piezoelectric material (for example, piezoelectric ceramic, etc.), and when the polarization direction of the piezoelectric vibrator 2 (the arrow line P in the figure represents the polarization direction of the piezoelectric vibrator 2) and the excitation electric field are perpendicular to each other, the piezoelectric vibrator 2 generates thickness shear vibration (the dotted line represents the deformation of the piezoelectric vibrator 2, and the double-arrow line S represents the vibration direction of the piezoelectric vibrator 2).
The thickness direction of the piezoelectric vibrating piece 2 is perpendicular to the surface of the touch pad 3, so that the thickness shear vibration direction of the piezoelectric vibrating piece 2 is parallel to the surface of the touch pad 3, and the touch pad 3 can be driven to vibrate along the preset direction parallel to the surface by the piezoelectric vibrating piece 2, so as to achieve touch feedback. It should be noted that the two are perpendicular in this application, which means that the included angle between the two is 90 ° or approximately 90 ° (degree)
In the embodiment of this application, piezoelectric vibrating piece 2 can produce the thickness shear vibration after the circular telegram, and the thickness shear vibration direction of piezoelectric vibrating piece 2 is parallel with the face of touch-control board 3 to go to drive touch-control board 3 through piezoelectric vibrating piece 2 and vibrate along the direction of predetermineeing parallel with the face, in order to reach touch-control feedback. For do the vibration through certain point that promotes the touch-control board, because the vibration direction of the touch-control board 3 of this application is parallel with the face, planar removal is done to whole structure, so this kind of vibration mode realizes more even vibration effect easily. Moreover, the piezoelectric vibrating piece 2 is used for replacing a metal key in the traditional touch pad, so that the whole thickness of the touch pad structure is favorably reduced.
As shown in fig. 1 and 2, since the piezoelectric vibrating element 2 vibrates in thickness shear, in order to reduce the thickness of the piezoelectric vibrating element 2 while ensuring the vibration amplitude of the piezoelectric vibrating element 2, the piezoelectric vibrating element 2 may be disposed in a sheet shape opposite to the touch pad 3, so as to reduce the overall thickness of the vibration feedback structure 100 of the touch pad.
One side of the piezoelectric vibrating element 2 is connected to the bottom surface of the touch pad 3, and one side of the piezoelectric vibrating element 2 away from the touch pad 3 may not be connected to the supporting element 1, for example, the touch pad 3 and the supporting element 1 are connected by an elastic element, so that the piezoelectric vibrating element 2 is connected to the bottom surface of the touch pad 3 in a suspended manner. The side of the piezoelectric vibrator 2 away from the touch pad 3 may also be connected to the support 1, for example, as shown in fig. 1 and 2, and in a specific embodiment, the side of the piezoelectric vibrator 2 away from the touch pad 3 is connected to the support 1. The piezoelectric vibrating piece 2 is clamped and mounted by the touch pad 3 and the support 1, which is beneficial to the firm mounting of the piezoelectric vibrating piece 2.
Touch-control panel 3 and support piece 1 are connected respectively to the both sides of piezoelectricity vibration piece 2, will drive touch-control panel 3 through piezoelectricity vibration piece 2 and vibrate along predetermineeing the direction, need carry on spacingly with piezoelectricity vibration piece 2 respectively with touch-control panel 3 and support piece 1 on predetermineeing the direction so, and will carry out spacing setting mode to piezoelectricity vibration piece 2 on touch-control panel 3 and support piece 1 and have kind, for example, can be that touch-control panel 3 and support piece 1 set up spacing arch etc.. In a specific embodiment, both the touch pad 3 and the support 1 are bonded to the piezoelectric vibrating element 2, and the piezoelectric vibrating element 2 is installed between the touch pad 3 and the support 1 in a limited manner by bonding, which is simpler than other limited installation manners of the piezoelectric vibrating element 2.
The piezoelectric vibrating pieces 2 are arranged between the touch pad 3 and the support 1, and one piezoelectric vibrating piece 2 can be arranged; a plurality of the units may be provided. The piezoelectric vibrating element 2 may be disposed corresponding to an edge region of the bottom surface of the touch panel 3; or may be provided corresponding to the central region of the bottom surface of the touch panel 3; it is also possible to simultaneously perform the setting corresponding to the edge area and the center area of the bottom surface of the touch panel 3. The piezoelectric vibrating piece 2 can be set to be in a regular shape such as a square shape, a circular shape, an annular shape, a U shape, a cross shape, a meter shape and the like; or may be provided in an irregular shape. It can be understood that, when the piezoelectric vibrating element 2 includes a plurality of sub-vibrating elements, the plurality of sub-vibrating elements are spaced apart along the periphery of the touch pad 3 or when the piezoelectric vibrating element 2 extends along the periphery of the touch pad 3, not only is it favorable to achieving a more uniform vibration effect, but also it is favorable to making the vibration amplitude of the touch pad 3 meet the requirement of touch feedback. In a specific embodiment, a surface (i.e. a bottom surface) of the touch panel 3 away from the touch surface has four edge regions connected end to end, and a piezoelectric vibrating element 2 is disposed at a joint of any two adjacent edge regions. The touch panel 3 is generally similar to a square shape, and four piezoelectric vibrating pieces 2 are correspondingly arranged at four corners of the touch panel 3, so that the piezoelectric vibrating pieces 2 are arranged, and the piezoelectric vibrating pieces 2 can be arranged at the minimum while the uniform vibration effect is ensured.
In order to further reduce the overall thickness of the vibration feedback structure 100 of the touch pad, as shown in fig. 4, in another specific embodiment, the support 1 is provided with a groove 11 corresponding to the piezoelectric vibrator 2, and a portion of the piezoelectric vibrator 2 close to the support 1 is provided in the groove 11. By providing the recess 11 in the support member 1 and disposing part of the piezoelectric vibrator 2 in the recess 11, the overall thickness of the vibration feedback structure 100 of the touch panel can be further reduced.
The touch panel 3 is driven to vibrate by the thickness shear vibration of the piezoelectric vibrating piece 2, the vibration amplitude of the thickness shear vibration of the piezoelectric vibrating piece 2 is usually smaller than that of other vibration modes of the piezoelectric vibrating piece 2, and therefore the thickness shear vibration of the piezoelectric vibrating piece 2 is usually used for manufacturing a piezoelectric accelerometer and the like. In order to ensure a better touch feedback effect of the thickness shear vibration of the piezoelectric vibrator 2, the vibration amplitude of the piezoelectric vibrator 2 needs to be increased, and the arrangement mode for increasing the vibration amplitude of the piezoelectric vibrator 2 is various, for example, the vibration amplitude of the thickness shear vibration of the piezoelectric vibrator 2 is equal to the shear piezoelectric strain constant d15Related toTherefore, the vibration amplitude of the piezoelectric vibrating piece 2 can be increased by selecting a piezoelectric material having a high shear piezoelectric strain constant to make the piezoelectric vibrating piece 2. For example, the piezoelectric vibrator 2 having the same thickness has a larger vibration amplitude of the piezoelectric vibrator 2 having a multi-layer structure than that of the piezoelectric vibrator 2 having a single-layer structure, so that when the piezoelectric vibrator 2 includes a plurality of vibration layers stacked in a direction perpendicular to the surface of the touch panel 3, the vibration amplitude of the piezoelectric vibrator 2 can be increased, and the piezoelectric vibrator 2 can be driven at a low voltage. For another example, the vibration amplitude of the thickness shear vibration of the piezoelectric vibrating piece 2 is related to the thickness of the piezoelectric vibrating piece 2, so that the vibration amplitude of the piezoelectric vibrating piece 2 can be increased by increasing the thickness of the piezoelectric vibrating piece 2, when the piezoelectric vibrating piece 2 is perpendicular to the dimension in the direction of the surface of the touch pad 3 is 0.5mm to 2mm, the dimension in the direction of the surface of the touch pad 3 is perpendicular to the piezoelectric vibrating piece 2, and through the optimized setting of the thickness dimension of the piezoelectric vibrating piece 2, not only the thickness of the piezoelectric vibrating piece 2 can be avoided being too small, and the problem of poor touch feedback effect is caused, but also the thickness of the piezoelectric vibrating piece 2 is too large, which is not beneficial to reducing the whole thickness of the vibration feedback structure 100 of the touch pad, and causes the problem of cost waste.
In another specific embodiment, as shown in fig. 4, an elastic layer 4 is provided between the piezoelectric vibrator 2 and the touch panel 3. Through set up elastic layer 4 between piezoelectric vibration piece 2 and touch-control board 3, be favorable to piezoelectric vibration piece 2 to drive touch-control board 3 vibration, multiplicable touch-control board 3's vibration range to satisfy touch-control feedback's requirement. The elastic layer 4 may be made of silica gel or the like, and is disposed between the piezoelectric vibrator 2 and the touch panel 3 by bonding or the like.
The application provides an electronic device which can be any electronic device with a touch interaction form. For example: mobile phones, tablet computers, notebook computers, electronic readers, remote controllers, and the like. Specifically, the electronic device includes the vibration feedback structure 100 of the touch pad as described above.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The utility model provides a vibration feedback structure of touch-control board, its characterized in that includes support piece, piezoelectricity vibration piece and touch-control board, the touch-control board along with the parallel orientation of predetermineeing of the face of touch-control board connect in support piece movably, the vibration mode of piezoelectricity vibration piece is the vibration of thickness shear, piezoelectricity vibration piece with a face connection of touch-control face is kept away from to the touch-control board is used for passing through the vibration of piezoelectricity vibration piece drives the touch-control board is followed predetermine the orientation vibration.
2. The vibration feedback structure of a touch panel according to claim 1, wherein a side of said piezoelectric vibrating element remote from said touch panel is connected to said supporting member.
3. The vibration feedback structure of a touch panel according to claim 2, wherein said touch panel and said supporting member are bonded to said piezoelectric vibrating element.
4. The vibration feedback structure of a touch panel according to claim 2, wherein the supporting member has a groove corresponding to the piezoelectric vibrator, and a portion of the piezoelectric vibrator near the supporting member is disposed in the groove.
5. A vibration feedback structure of a touch panel as defined in claim 2, wherein an elastic layer is provided between said piezoelectric vibrating element and said touch panel.
6. The vibration feedback structure of a touch panel according to any one of claims 1 to 5, wherein the piezoelectric vibrator includes a plurality of sub-vibrators spaced apart from each other along a periphery of the touch panel; alternatively, the first and second electrodes may be,
the piezoelectric vibrating piece extends along the periphery of the touch pad.
7. The vibration feedback structure of a touch panel according to any one of claims 1 to 5, wherein a surface of the touch panel remote from the touch surface has four edge regions connected end to end, and a piezoelectric vibrating element is provided at a joint of any two adjacent edge regions.
8. The vibration feedback structure of a touch panel according to any one of claims 1 to 5, wherein the piezoelectric vibrator includes a plurality of vibration layers, and the plurality of vibration layers are stacked in a direction perpendicular to the panel surface of the touch panel.
9. A vibration feedback structure of a touch panel according to any one of claims 1 to 5, wherein the piezoelectric vibrating element has a dimension of 0.5mm to 2mm in a direction perpendicular to the panel surface of the touch panel.
10. An electronic device comprising a vibration feedback structure of a touch pad according to any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921806385.5U CN210402269U (en) | 2019-10-24 | 2019-10-24 | Vibration feedback structure of touch pad and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921806385.5U CN210402269U (en) | 2019-10-24 | 2019-10-24 | Vibration feedback structure of touch pad and electronic equipment |
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| CN210402269U true CN210402269U (en) | 2020-04-24 |
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| CN201921806385.5U Expired - Fee Related CN210402269U (en) | 2019-10-24 | 2019-10-24 | Vibration feedback structure of touch pad and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114428567A (en) * | 2021-12-23 | 2022-05-03 | 深圳莱宝高科技股份有限公司 | Touch control panel and terminal equipment |
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2019
- 2019-10-24 CN CN201921806385.5U patent/CN210402269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114428567A (en) * | 2021-12-23 | 2022-05-03 | 深圳莱宝高科技股份有限公司 | Touch control panel and terminal equipment |
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Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330000 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee before: OFilm Microelectronics Technology Co.,Ltd. Address after: 330000 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: OFilm Microelectronics Technology Co.,Ltd. Address before: 330013 No.698 Tianxiang Avenue, high tech Zone, Nanchang City, Jiangxi Province Patentee before: NANCHANG OFILM BIO-IDENTIFICATION TECHNOLOGY Co.,Ltd. |
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