CN108346372B - Display device - Google Patents
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- CN108346372B CN108346372B CN201710057725.8A CN201710057725A CN108346372B CN 108346372 B CN108346372 B CN 108346372B CN 201710057725 A CN201710057725 A CN 201710057725A CN 108346372 B CN108346372 B CN 108346372B
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- display device
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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Abstract
The present invention provides a display device including: the frame body assembly comprises a back plate and a frame surrounding the back plate to form an accommodating space, wherein the back plate is provided with an inner bottom wall; the display panel is positioned in the accommodating space and is opposite to the inner bottom wall, and a gap is formed between the display panel and the inner bottom wall; a cover plate positioned over the display panel; and the elastic component is arranged between the inner side bottom wall of the back plate and the cover plate and surrounds the display panel, and when the elastic component is stressed to be compressed and deformed, the gap between the display panel and the inner side wall is reduced. The display device provided by the invention improves the shock resistance of the cover plate.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
In the structure of the existing display device, a cover plate of the display device is provided with a flat cover plate and a cover plate with an arc edge chamfer. The structure of a display device including a planar cover plate and a cover plate having a chamfered arc edge is shown in fig. 1 and 2, respectively. Fig. 1 shows a display device 100 comprising a planar cover plate 120. The display device 100 is used as a frame of a mobile phone to enhance the strength of the entire display device to some extent, and as a carrier for connecting and supporting a screen. The cover plate 120 of the display device 100 is typically lower than the frame. Although the cover plate 120 is not necessarily directly impacted when the display device falls, but the frame is impacted first, the cover plate 120 is easily damaged if a large front impact force is directly applied to the cover plate 120.
Fig. 2 shows a display device 200 comprising a cover plate 220 with a chamfered arc edge.
The cover plate 220 with the arc-edge chamfer has the characteristics of good hand feeling, easiness in point control, good visual effect and the like due to the round appearance, and is more suitable for the aesthetic feeling of users and the touch experience in use. In order to improve the feel, appearance and use experience of the display device 200 having the cover plate 220, the top surface of the cover plate 220 is higher than the top surface of the front case 210 than the display device 100 having the planar cover plate 120, and the contact area of the cover plate 220 with an external object is larger.
Therefore, the display device 200 has the above advantages, but the strength of the entire drop impact resistance is more considered. In other words, for the display device 200, when one side of the cover 220 is impacted, the cover 220 has a higher contact probability with an external object and a larger contact area because the top surface of the cover 220 is higher than that of the front case 210, and therefore, the cover 220 is more directly stressed and is more easily broken.
Therefore, whether the flat cover plate 120 or the cover plate 220 with the arc-edge chamfer, when the display device 100, 200 is impacted, the probability of the cover plate breaking and thus the display device being damaged is greatly increased because the cover plate is directly stressed (e.g., the cover plate directly impacts the ground or an object directly impacts the cover plate).
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a display device, which improves the shock resistance of a cover plate of the display device.
The present invention provides a display device including: the frame body assembly comprises a back plate and a frame surrounding the back plate to form an accommodating space, wherein the back plate is provided with an inner bottom wall; the display panel is positioned in the accommodating space and is opposite to the inner bottom wall, and a gap is formed between the display panel and the inner bottom wall; a cover plate positioned over the display panel; and the elastic component is arranged between the inner side bottom wall of the back plate and the cover plate and surrounds the display panel, and when the elastic component is stressed to be compressed and deformed, the gap between the display panel and the inner side wall is reduced.
Preferably, the compression direction of the elastic component is perpendicular to the plane of the display panel.
Preferably, the elastic member includes a plurality of elastic members independent of each other, the plurality of elastic members surrounding the display panel to be in a ring-like configuration.
Preferably, the display panel is in a polygonal shape, and a pitch of the plurality of elastic elements near a corner of the display panel is smaller than a pitch of the plurality of elastic elements far from the corner of the display panel.
Preferably, the spacing between the plurality of elastic elements is between 0.3 mm and 0.5 mm, and the width of each elastic element is between 0.5 mm and 1 mm.
Preferably, each of the elastic elements has a different elastic coefficient.
Preferably, the elastic element is connected with the cover plate or a layer below the cover plate through an adhesive part.
Preferably, the elastic element is a micro spring.
Preferably, the elastic assembly is fixedly connected with the frame assembly through a first positioning column.
Preferably, the method further comprises the following steps: the metal plate is provided with a plurality of second positioning columns, the metal plate is located between the frame body assembly and the cover plate, and the second positioning columns are opposite to the first positioning columns.
Preferably, the method further comprises the following steps: and the foam double-sided adhesive tape is connected with the metal plate and the cover plate.
Preferably, the cover plate is a plane cover plate, and the top surface of the cover plate is higher or lower than the top surface of the frame body assembly.
Preferably, the cover plate is an arc-shaped cover plate with an arc-shaped edge chamfer at one side far away from the display panel, and the top surface of the cover plate is higher than the top surface of the frame body assembly.
Preferably, the minimum compressible deformation amount of the elastic component is greater than or equal to the height difference between the top surface of the cover plate and the top surface of the frame body component in the original state.
Preferably, a buffer layer is further disposed between the display panel and the inner bottom wall.
Compared with the prior art, the invention has the following advantages:
1) by utilizing the elastic component, when the cover plate receives impact, the display panel sinks towards the frame body back plate, so that the gap between the display panel and the inner bottom wall is reduced, a buffering process is achieved, and the stress strength of the display device is increased;
2) the minimum compressible deformation a of the elastic component is more than or equal to the height difference h of the top surface of the cover plate higher than the top surface of the frame component in the original state, so that when a large impact force is applied, the top surface of the cover plate can be lower than the top surface of the frame component, the impact force is transferred to the top surface of the frame component, the damage probability of the cover plate can be reduced, and the cover plate is prevented from being broken;
3) for the display panel with the polygonal shape, the support of each corner of the display panel is enhanced by enabling the distance between the elastic elements close to the corner of the display panel to be smaller than that between the elastic elements far away from the corner of the display panel, and meanwhile, the stress of the cover plate is easier to drop because the distance between the elastic elements far away from the corner of the display panel is larger; and
4) the elastic member and the display panel are positioned under the cover plate, so that the size of the display device is limited only by the size of the cover plate, and the added elastic member does not need to increase the radial dimension of the display device.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a schematic view according to a display device with a planar cover plate.
Fig. 2 shows a schematic view of a display device according to the invention comprising a cover plate with curved edge chamfers.
Fig. 3 shows a schematic diagram of a display device according to an embodiment of the invention.
Fig. 4 shows a cross-sectional view of the AA' portion of the display device of fig. 3 when it is just under load (or not under load).
Fig. 5 shows a cross-sectional view of the AA' portion of the display device of fig. 3 under a force.
Fig. 6 shows a cross-sectional view of the portion BB' of the display device shown in fig. 3.
Fig. 7A to 7E show schematic views of mounting a spring assembly according to an embodiment of the present invention.
Fig. 8 shows a schematic view illustrating a metal plate according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.
The drawings of the present invention are only for illustrating the relative positional relationship, and the dimensions of some parts are exaggerated in the drawing for easy understanding, and the dimensions in the drawings do not represent the proportional relationship of the actual dimensions.
In order to solve the defect that the display device is damaged due to the fact that a cover plate of the display device is easy to break when the display device is impacted by an object or falls off in the prior art, the invention provides the display device, and the impact resistance of the cover plate is improved. The display device provided by the present invention will be described with reference to fig. 3 to 6.
Fig. 3 to 6 respectively show a schematic view and a cross-sectional view in different directions of a display device according to an embodiment of the present invention. The display device 300 includes a frame assembly 310, a display panel 320, a cover plate 330 and an elastic assembly 340.
The frame assembly 310 forms a receiving space for receiving the display panel 320. Specifically, the frame assembly 310 includes a back plate 311 and a bezel 312. The back plate 311 and the bezel 312 may be an integrally formed structure. The backplate 311 and the bezel 312 are preferably composed of the same material. For example, the back plate 311 and the frame 312 may be made of aluminum alloy, stainless steel, glass fiber, or the like. In other embodiments, the back plate 311 and the frame 312 are assembled and may be made of different materials, and those skilled in the art may implement further embodiments, which are not described herein.
Specifically, the back plate 311 is opposite to the display panel 320. The side of the back plate 311 facing the display panel 320 is an inner bottom wall 313. Preferably, the shape of the back plate 311 is adapted to the shape of the cover plate 330. In other words, the back plate 311 and the cover plate 330 have the same shape and are about the same size or the outer diameter of the back plate 311 is slightly larger than the outer diameter of the cover plate 330.
The display panel 320 is located in the accommodating space formed by the frame assembly 310. The display panel 320 is opposite to the inner bottom wall 313 of the frame assembly 310, and a gap 360 is formed between the display panel 320 and the inner bottom wall 313. The display panel 320 may emit light using different light emitting technologies. For example, the display panel 320 may emit light using a liquid crystal technology, an organic light emitting technology, an electro luminescence technology, or the like. In the present embodiment, the display panel 320 preferably emits light using an organic light emitting technology. Preferably, the display panel 320 includes an array substrate, an encapsulation layer, a polarizing layer, and the like. Gate lines, data lines, TFT devices, organic light emitting devices, and the like are formed on the array substrate. The above description only describes one implementation of the display panel 320, and the display panel 320 may have other structures, which are not described herein.
The cover plate 330 is positioned on the display panel 320. The shape of the cover plate 330 may be the same as the display panel 320, but the outer diameter of the cover plate 330 is larger than the outer diameter of the display panel 320. Preferably, the cover plate 330 has an arc edge chamfer 331 on a side away from the display panel 320. In other words, the side of the cover plate 330 away from the display panel 320 is an arc-shaped surface. Because the cover plate 330 has the arc-edge chamfer 331, the edge of the cover plate is smooth and has no edge angle, so that a user has good hand feeling. In addition, since the cover 330 has a round shape, it can provide a visual effect of floating display when the light of the display panel 320 located therebelow is emitted. The cover plate 330 provided by the present invention may also have other shapes, for example, the cover plate 330 may also be a planar cover plate. The cover plate 330 may be a glass cover plate or a cover plate constructed of other materials. In the present embodiment, the top surface of the cover plate 330 exceeds the top surface of the frame assembly 310. Specifically, the maximum height difference h between the top surface of the cover plate 330 and the top surface of the frame assembly 310 (the top surface of the bezel 312 farthest from the backplate 311) is less than or equal to the height b of the gap 360 between the display panel 320 and the inner bottom wall 313 in the original state.
The elastic component 340 is disposed between the inner bottom wall of the back plate and the cover plate, and surrounds the display panel 320. In the present embodiment, the elastic member 340 connects the inner bottom wall 313 of the frame member 310 and the cover plate 330, respectively. The compression direction of the elastic member 340 is perpendicular to the plane of the display panel 320. In the present embodiment, the elastic member 340 includes a plurality of elastic elements 341 independent from each other. The plurality of elastic elements 341 are annularly arranged around the display panel 320. The spacing between each of the elastic elements 341 is between 0.3 mm and 0.5 mm. Each elastic element 341 has a width of between 0.5 mm and 1 mm. Preferably, the height of each elastic element 341 is greater than 1 mm. The elastic element 341 is preferably a micro spring. In some variations, the elastic member 340 may also have an integrally formed structure, for example, the elastic member 340 has a closed shape surrounding the display panel 320.
Specifically, the elastic member 340 is used to support the cover plate 330 and to make the cover plate 330 descend and buffer when an external force is applied. Further, the minimum compressible deformation amount a of the elastic component 340 is greater than or equal to the height difference h that the top surface of the cover plate 330 is higher than the top surface of the frame component 310 in the original state, so that when a large impact force is applied, the top surface of the cover plate 330 can be lower than the top surface of the frame component 310, the impact force is transferred to the top surface of the frame component 310, the breakage probability of the cover plate can be reduced, and the cover plate is prevented from being broken. Meanwhile, the minimum compressible deformation amount a of the elastic member 340 and the height difference h of the top surface of the cover plate 330 above the top surface of the frame member 310 are both less than or equal to the height b of the gap 360 between the display panel 320 and the inner bottom wall 313 in the original state to give sufficient space for the cover plate 330 to descend and buffer.
Specifically, the elastic element 340 is connected and fixed to the cover plate 330 by the adhesive portion 350. In this embodiment, the adhesive part 350 may be a double-sided adhesive tape made of foam. The adhesive part 350 may be a continuous double-sided adhesive and have a closed shape surrounding the display panel 320. The adhesive part 350 having the closed shape can increase the coupling strength of the elastic member 340 and the cover plate 330, and the process is simple when the display device 300 is assembled. In some variations, the adhesive part 350 may include a plurality of separate double-sided adhesives to reduce the cost of the adhesive part 350. In some variations, the adhesive 350 may also be a glue for connecting the elastic element 340 and the cover 330.
Referring to fig. 4 and 5, a schematic view of one side of the cover plate 330 of the display device 300 before and after impact by a foreign object is described.
Referring to fig. 4, the elastic element 340 is used as a supporting structure of the cover plate, and the cover plate can maintain the original position height without affecting the appearance and the use feel under the condition of no contact or light contact with fingers. A cross-sectional view of the display device 300 just after (or without) an impact from a foreign object. In fig. 4, the elastic member 340 of the display device 300 is uncompressed, and the top surface of the cover plate 330 exceeds the top surface of the frame member 310.
After the display device 300 receives the impact of the foreign object, referring to fig. 5, the impact force is first transmitted to the elastic element 340 through the cover 330 to start to compress, and then the cover 330 drives the display panel 320 to move downward, so that the height of the gap 360 between the display panel 320 and the inner bottom wall 313 is reduced, and the overshoot of the force buffer is achieved, and the force strength is reduced. When the top surface of the frame is higher than the cover 330, the impact force is converted to act on the top surface of the frame and act as a support, so as to disperse the planar load.
Preferably, the height of the gap 360 shown in FIG. 4 is slightly greater than the maximum height difference between the top surface of the cover plate 330 and the top surface of the frame assembly 310 (the top surface of the bezel 312 farthest from the back plate 311) when not under stress. With this arrangement, the cover plate 330 can be given a sufficient lowering and buffering space. Moreover, when the height of the gap 360 shown in fig. 4 is slightly greater than (or equal to) the maximum height difference, the cover plate 330 may be lowered to a position where the top surface of the cover plate 330 does not exceed the top surface of the frame member 310 after receiving an impact, and the top surface of the frame member 310 (the top surface of the bezel 312) receives the impact to further prevent the cover plate 330 from being broken.
Further, in embodiments where the elastic assembly 340 includes a plurality of elastic elements 341, the above-described two functions of the elastic assembly 340 may be optimized by the arrangement of the elastic elements 341. Specifically, when the display panel 320 has a polygonal shape, the pitch of the plurality of elastic elements 341 close to the corners of the display panel 320 is set to be smaller than the pitch of the plurality of elastic elements 341 far from the corners of the display panel 320. Specifically, referring to fig. 6, the spacing between the elastic elements 341 near both sides is smaller, while the spacing between the elastic elements 341 in the center is larger. This arrangement provides improved support for the cover plate 330 while allowing the central portion of the cover plate 330 to sink more easily when subjected to forces. In some variations, the spacing between the elastic elements 341 may also be the same throughout. In some variations, the elastic element 341 with different elastic coefficients may be configured according to different requirements to change the supporting performance of the cover plate 330.
In yet another variation, the display device 300 may further include a buffer layer. The buffer layer is disposed between the display panel 320 and the rear plate 311. The buffer layer may be attached to the lower side of the display panel 320 or the upper side of the rear plate 311. The buffer layer prevents the display panel 320 from being damaged by contacting the back plate 311 when the cover plate 330 descends. Meanwhile, when the buffer layer under the display panel 320 is in contact with the back plate 311, the buffer layer may also play a role of dispersing impact.
Compared with the prior art, the cover plate of the original display device needs to bear 100% of impact force when falling, and the elastic component is used as a cover plate supporting structure, so that the impact can be absorbed firstly to buffer the cover plate; after the cover plate sinks, the top surface of the frame body is used as an impact support; meanwhile, the buffer layer below the display panel also plays a role in dispersing impact, so that the degree of load on the cover plate of the display device can be greatly reduced, the risk of screen breakage when the display device falls is reduced, and the use experience of a user is improved.
In another variation, the display device 300 may further include a touch panel. The touch panel is located between the cover 330 and the display panel 320. Preferably, the outer diameter of the touch panel is slightly larger than the outer diameter of the display panel 320. In such a variation, the elastic element 340 is connected to the touch panel through the adhesive 350 and further connected to the cover 330. Specifically, the display device 300 may further include more layers, and the elastic member 340 may be connected to a layer under the cover plate 330 and then fixed to the cover plate 330.
Fig. 4 to fig. 6 only illustrate one specific embodiment of the present invention, and those skilled in the art can implement more modified structures according to the above description, and these modified structures are all within the protection scope of the present invention, and are not described herein again.
The connection structure and the connection process of the elastic member and the cover plate and frame assembly of the present invention will be described with reference to fig. 7A to 7E.
Taking an elastic element as an example, refer first to fig. 7A. Positioning posts 420 are embedded in the back plate 410 of the frame assembly. In some variations, the positioning posts 420 may also be fixed on the back plate 410 by dispensing. Meanwhile, a metal plate 440 is also fixed with the positioning posts 420. The structure of the metal plate 440 can be seen in fig. 8,. Preferably, the metal plate 440 has a closed shape surrounding the display panel, and a plurality of positioning posts 420 are fixed on the metal plate 440. The metal plate 440 may be made of stainless steel or aluminum.
Then, referring to fig. 7B, the elastic element 430 is sleeved on the positioning post 420 of the back plate 410 and further connected with the back plate 410 by dispensing.
Then, referring to fig. 7C, the metal plate 440 with the positioning posts 420 fixed thereon is aligned with the elastic element 430, and one end of the elastic element 430 away from the back plate 410 is sleeved into the positioning posts 420 on the metal plate 440. Similarly, the elastic element 430 is further connected to the metal plate 440 by dispensing.
With continued reference to fig. 7D, the foam double-sided tape 450 is attached to the metal plate 440, and the structure shown in fig. 7D is pressurized, so that the foam double-sided tape 450 can be better fixedly connected to the metal plate 440.
Finally, referring to fig. 7E, the cover plate 460 is attached to the other side of the foam double-sided tape 450, and the structure in fig. 7E is pressurized, so that the foam double-sided tape 450 can be fixedly connected with the cover plate 460 better.
Fig. 7A to 7E only illustrate one embodiment of the fixed connection between the elastic element and the cover plate and the back plate, and those skilled in the art can implement more connection manners, for example, the elastic element can also be connected and fixed with the frame of the frame assembly, and these connection manners are within the protection scope of the present invention and are not described herein again.
Compared with the prior art, the invention has the following advantages:
1) by utilizing the elastic component, when the cover plate receives impact, the display panel sinks towards the frame body back plate, so that the gap between the display panel and the inner bottom wall is reduced, a buffering process is achieved, and the stress strength of the display device is increased;
2) the minimum compressible deformation a of the elastic component is more than or equal to the height difference h of the top surface of the cover plate higher than the top surface of the frame component in the original state, so that when a large impact force is applied, the top surface of the cover plate can be lower than the top surface of the frame component, the impact force is transferred to the top surface of the frame component, the damage probability of the cover plate can be reduced, and the cover plate is prevented from being broken;
3) for the display panel with the polygonal shape, the support of each corner of the display panel is enhanced by enabling the distance between the elastic elements close to the corner of the display panel to be smaller than that between the elastic elements far away from the corner of the display panel, and meanwhile, the stress of the cover plate is easier to drop because the distance between the elastic elements far away from the corner of the display panel is larger;
4) the elastic member and the display panel are positioned under the cover plate, so that the size of the display device is limited only by the size of the cover plate, and the added elastic member does not need to increase the radial dimension of the display device.
Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
Claims (13)
1. A display device, comprising:
the frame body assembly comprises a back plate and a frame surrounding the back plate to form an accommodating space, wherein the back plate is provided with an inner bottom wall;
the display panel is positioned in the accommodating space and is opposite to the inner bottom wall, and a gap is formed between the display panel and the inner bottom wall;
a cover plate movably positioned over the display panel relative to the frame assembly; and
an elastic component arranged between the inner bottom wall of the back plate and the cover plate and surrounding the display panel, wherein when the elastic component is stressed to be compressed and deformed, the gap between the display panel and the inner bottom wall is reduced, wherein,
the cover plate is an arc-shaped cover plate with an arc-edge chamfer at one side far away from the display panel, the top surface of the arc-shaped cover plate is higher than the top surface of the frame body component, and the minimum compressible deformation of the elastic component is larger than or equal to the height difference between the top surface of the cover plate and the top surface of the frame body component in the original state.
2. The display device of claim 1, wherein the compression direction of the elastic member is perpendicular to the plane of the display panel.
3. The display device according to claim 1, wherein the elastic member includes a plurality of elastic members independent of each other, the plurality of elastic members being arranged in a ring shape around the display panel.
4. The display device according to claim 3, wherein the display panel is polygonal in shape, and a pitch of the plurality of elastic members near a corner of the display panel is smaller than a pitch of the plurality of elastic members far from the corner of the display panel.
5. The display device of claim 3, wherein the plurality of elastic elements are spaced between 0.3 mm and 0.5 mm apart, and each elastic element has a width between 0.5 mm and 1 mm.
6. A display device as claimed in claim 3, characterized in that the elastic elements have different elastic coefficients.
7. The display device according to claim 3, wherein the elastic member is connected to the cover plate through an adhesive portion or the elastic member is connected to a layer located under the cover plate through an adhesive portion.
8. The display device of claim 3, wherein the elastic element is a micro-spring.
9. The display apparatus as claimed in claim 1, wherein the elastic member is fixedly connected to the frame member via a first positioning post.
10. The display device according to claim 9, further comprising:
the metal plate is provided with a plurality of second positioning columns, the metal plate is located between the frame body assembly and the cover plate, and the second positioning columns are opposite to the first positioning columns.
11. The display device according to claim 10, further comprising:
and the foam double-sided adhesive tape is connected with the metal plate and the cover plate.
12. The display device according to any one of claims 1 to 11, wherein the cover plate is a planar cover plate, and a top surface of the cover plate is higher or lower than a top surface of the frame body assembly.
13. The display device according to any one of claims 1 to 11, wherein a buffer layer is further provided between the display panel and the inner bottom wall.
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| CN201710057725.8A CN108346372B (en) | 2017-01-23 | 2017-01-23 | Display device |
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| CN201710057725.8A CN108346372B (en) | 2017-01-23 | 2017-01-23 | Display device |
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| CN108346372B true CN108346372B (en) | 2020-12-22 |
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| CN113380148A (en) * | 2021-06-22 | 2021-09-10 | 京东方科技集团股份有限公司 | Flexible screen module, method for preparing flexible screen module and display device |
| CN113593413B (en) * | 2021-07-30 | 2023-09-29 | 昆山国显光电有限公司 | Display panel and display device |
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Address after: 201506, No. nine, No. 1568, Jinshan Industrial Zone, Shanghai, Jinshan District Applicant after: Shanghai Hehui optoelectronic Co., Ltd Address before: 201506 No. nine, No. 1568 engineering road, Shanghai, Jinshan District Applicant before: EverDisplay Optronics (Shanghai) Ltd. |
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