CN109448557A - Flexible die group, display panel and the display device with the display panel - Google Patents
Flexible die group, display panel and the display device with the display panel Download PDFInfo
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- CN109448557A CN109448557A CN201811504044.2A CN201811504044A CN109448557A CN 109448557 A CN109448557 A CN 109448557A CN 201811504044 A CN201811504044 A CN 201811504044A CN 109448557 A CN109448557 A CN 109448557A
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- protrusion
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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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The present invention provides a kind of flexible die group, display panel and with the display device of the display panel, wherein flexible die group includes the first, second film layer of fitting setting, two surfaces that first, second film layer fits are at least partially formed with raised engaging portion, raised engaging portion include it is several be spaced the first protrusion being formed in the first film layer and it is several be spaced the second protrusion being formed in the second film layer, first protrusion and second protrusion are fixed to each other clamping；For flexible die group according to the present invention in bending or curly course, raised engaging portion can effectively inhibit the Relative sliding between two film layer contact surfaces, to reduce the probability that two film layers layering unsticking phenomenon occurs.
Description
Technical field
The present embodiments relate to flexible display device manufacturing technology field more particularly to a kind of flexible die groups, display surface
Plate and display device with the display panel.
Background technique
With the development of OLED display technology, flexible die group using more and more extensive.Flexible die group generally includes to be laminated
Multi-layer film structure.In practical applications, flexible display apparatus is in continuous bending or curly course, two to fit
Easily there is layering unsticking due to respectively bending the factors such as shearing force mutual in ability difference and bending process in film layer
The problem of etc. flexible die group quality is seriously affected, and influence the quality of terminal presentation facility.
In view of this, it is necessary to provide a kind of technological means to solve the above problems.
Summary of the invention
The present invention is directed at least solve one of technical problem of the existing technology, for achieving the above object, this hair
Bright to provide a kind of flexible die group, specific design method is as follows.
A kind of flexible die group, the first film layer and the second film layer including fitting setting, first film layer and described second
Two surfaces that film layer fits are at least partially formed with raised engaging portion, and the protrusion engaging portion includes that several intervals are formed in institute
State the second protrusion that the first protrusion and several intervals in the first film layer are formed in second film layer, first protrusion
It is fixed to each other clamping with second protrusion.
Further, each first protrusion is located between second protrusion that at least three are adjacent, each
Second protrusion is located between first protrusion that at least three are adjacent.
Further, also there is several enclosed by first protrusion with the described second raised side wall to set shape for the raised engaging portion
At side chamber；Preferably, each first protrusion and each second protrusion are abutted at least one described side chamber.
Further, in the interior zone of the raised engaging portion, each first protrusion tool there are three being adjacent and
Second protrusion being distributed on three vertex of equilateral triangle, there are three be adjacent and be distributed each second protrusion tool
In first protrusion on three vertex of equilateral triangle.
Further, first protrusion and second protrusion be in prism-frustum-shaped or round table-like, and first protrusion and
The base area of second protrusion is greater than top surface area；Preferably, first protrusion and the thickness of first film layer it
Than and second protrusion and second film layer the ratio between thickness between 1:5-1:2.
Further, it is formed with the first top chamber between the top surface and second film layer of first protrusion, described second is convex
The second top chamber is formed between the top surface risen and first film layer.
Further, first protrusion and second protrusion are in positive six prism-frustum-shaped, in the raised engaging portion
Portion region, three second protrusions adjacent with each first protrusion are abutted to described in this first raised three not phases
Adjacent side wall, three first protrusions adjacent with each second protrusion abut non-conterminous to second protrusion three
Side wall.
Further, the raised engaging portion takes shape at the marginal position of the flexible die group.
The present invention also provides a kind of display panels comprising above-described flexible die group, first film layer is inclined
Light film, second film layer are touch control film.
The present invention also provides a kind of display device, the display device at least has above-described display panel.
The beneficial effects of the present invention are: the specific structure based on flexible die group of the present invention, flexible die group is bending or is rolling up
During song, the first film layer and the second film layer raised engaging portion between two surfaces that fits can effectively inhibit two film layers to connect
Relative sliding between contacting surface, so that the probability that two film layers are layered the generation of unsticking phenomenon because of caused by Relative sliding be effectively reduced.
In addition, the present invention can reduce the usage amount of optical cement between two film layers by the setting of the protrusion engaging portion structure, or even
The optical cement between two film layers can be fully phased out under some cases, reduced costs.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of flexible die group in the prior art；
Fig. 2 is the schematic diagram in Fig. 1 after the curling of flexible die group；
Fig. 3 is the status diagram that flexible die group is restored after repeatedly crimping in Fig. 1；
Fig. 4 is a kind of structural schematic diagram of flexible die group of the present invention；
Fig. 5 is the enlarged diagram of the part a in Fig. 4；
Fig. 6 is that the first of section implements structural schematic diagram at the position A-A ' in Fig. 5；
Fig. 7 is to tie before being bonded with the first film layer in the flexible die group for implementing structure shown in Fig. 6 with the second film layer in protrusion
Structural schematic diagram at conjunction portion position；
Fig. 8 is the enlarged diagram of the part b in Fig. 7；
Fig. 9 is second of implementation structural schematic diagram in section at the position A-A ' in Fig. 5；
Figure 10 is to tie before being bonded with the first film layer in the flexible die group for implementing structure shown in Fig. 9 with the second film layer in protrusion
Structural schematic diagram at conjunction portion position；
Figure 11 is the enlarged diagram of the part c in Figure 10；
Figure 12 is the first floor map of flexible die group of the present invention；
Figure 13 is second of floor map of flexible die group of the present invention；
Figure 14 is a kind of structural schematic diagram of display device in the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As described in background, flexible die group there are problems that being layered unsticking in the prior art, combine Fig. 1 in detail below
It is described to Fig. 3.
As shown in Figure 1, flexible die group in the prior art includes the two lower film layers 11 and upper film layer 12 being bonded to each other,
With preferable flexibility, can be bent back and forth towards both direction.Before the bending of flexible die group, lower film layer 11 and upper film layer 12 are in flat
Gapless is bonded between smooth shape and two surfaces being in contact, and has preferable light transmission.
As shown in Fig. 2, when flexible die group is bent up and down, since bending radius exists between lower film layer 11 and upper film layer 12
Different, there are certain shearing forces between the contact surface of the two, when the shearing force is greater than the frictional force between this two film layer
When, mutual dislocation sliding will occur between the contact surface of the two film layers.
To occur after bending so is repeated several times, between the lower film layer 11 and upper film layer 12 of flexible die group as shown in Figure 3
Gap 10, that is, descend between film layer 11 and upper film layer 12 to occur unsticking phenomenon.In flexible display device manufacturing technology field, such as should
Flexible die group constitutes the light emission side element of display device, due to the presence in gap 10 between lower film layer 11 and upper film layer 12, display
The part of device, which will go out light path, to be affected, bad so as to cause the picture image quality of display device.
It is asked to effectively solve to be easy the technology of unsticking in flexible die group bending process between two film layers being bonded to each other
Topic, the present invention provides a kind of flexible die groups, and the present invention is specifically described below with reference to structure shown in Fig. 4-Figure 14.
Refering to what is shown in Fig. 4, flexible die group involved in the present invention includes the first film layer 21 and the second film of fitting setting
Layer 22, two surfaces that the first film layer 21 and the second film layer 22 fit are at least partially formed with raised engaging portion 20.In conjunction with Fig. 5 institute
Show, raised engaging portion 20 includes that the first protrusion 211 that several intervals are formed in the first film layer 21 and several intervals are formed in
The second protrusion 221 in second film layer 22, the first protrusion 211 and the second protrusion 221 are fixed to each other clamping.
Based on the above design, in flexible die group in bending or curly course, the first film layer 21 and the second film layer 22
The raised engaging portion 20 between two surfaces that fits can effectively inhibit Relative sliding between two film layer contact surfaces, i.e., first is convex
Rise 21 and second protrusion 22 it is mutual clamp down on active force greater than between two film layer contact surfaces in flexible die group bending process
Shearing force can so reduce the probability that two film layers are layered the generation of unsticking phenomenon because of caused by Relative sliding.
Further combined with shown in Fig. 6, Fig. 9, interior zone in raised engaging portion 20, each first raised 211 sandwiched
Between the second protrusion 221 that three are adjacent, each second protrusion 221 is located in three the first protrusions being adjacent
Between 211.
In the present invention, in conjunction with shown in Fig. 6, Fig. 9, be relatively easy to understand, every one first protrusion 211 be located in three with
Its abut the second protrusion 221 between refer to: three second protrusion 221 simultaneously abutting to first protrusion 211 circumferential direction
The different piece of side three can so prevent opposite second film layer 22 of the first protrusion 211 from generating sliding movement.Correspondingly,
Every one second protrusion 221 is located between the first protrusion 211 that three are adjacent and refers to: three the first protrusions 211 are simultaneously
It abuts to three different pieces of circumferential sides of second protrusion 221, can so prevent opposite first film of the second protrusion 221
Layer 21 generates sliding movement.
It is understood that above in relation to the first protrusion 21 and the matching relationship of the second protrusion 22 being to be defined in the present invention
" interior zone of raised engaging portion 20 ", rather than whole region.This is because, for opposite with raised 20 interior zone of engaging portion
Fringe region for, the first protrusion 211 in raised 20 fringe region of engaging portion is towards one outside raised engaging portion 20
There is no the second protrusions 221 to abut against with it for side, the 221 direction protrusion knot of the second protrusion in raised 20 fringe region of engaging portion
There is no the first protrusions 211 to abut against with it for side outside conjunction portion 20.So cause and every one first protrusion 211 of fringe region
The quantity of the second adjacent protrusion 221 is less than the quantity with raised 211 the second adjacent protrusions 221 of interior zone first,
It is less than with the quantity of raised 221 the first adjacent protrusions 211 of fringe region second adjacent with the second protrusion 221 of interior zone
The first protrusion 211 quantity.
In this specific embodiment, with raised 20 first raised 211 the second adjacent protrusions 221 of fringe region of engaging portion
Quantity be 1 or 2, the quantity with the first adjacent protrusion 211 of 20 the second protrusion of fringe region of raised engaging portion 221 be also 1 or
2。
In other embodiment not showns of the invention, interior zone in raised engaging portion 20, every one first is convex
The second protrusion of more than three 221 can have been abutted by playing 211 peripheries, and every one second raised 221 peripheries can abut more than three
First protrusion 211, does not further spread out specifically herein.
In addition, protrusion engaging portion 20 involved in the present invention also has several side chambers 200, often as shown in Fig. 6, Fig. 9
One side chamber 200 is enclosed to set by multiple first protrusions 211 with the side wall of the second protrusion 221 to be formed, and every one first raised 211 and every 1 the
Two protrusions 221 are adjacent at least one side chamber 200.Fig. 6, embodiment illustrated in fig. 9 specific implementation process in, in protrusion tie
The interior zone in conjunction portion 20, every one first protrusion 211 are connected to three different side chambers 200 from every one second protrusion 221.
Based on the setting of side chamber 200, in the bending process of flexible die group, when first protrusion 211 and second protrusion 221 by
To when squeezing, can adaptively deform according to pressure and to 200 inside projection of side chamber, so reduction flexible die group is curved
The influence of first protrusion 211 and the second raised 221 deformation to flexible die group thickness during folding；And first protrusion 211 and/or
Second protrusion 221 adaptively deforms when being squeezed and the flexible nature of flexible die group can be improved to 200 inside projection of side chamber.
It based on the above implementation structure of the invention, is relatively easy to know, in certain embodiments, be combined by protrusion
The setting in portion 20 can reduce the usage amount of optical cement between two film layers, or even can be fully phased out in some cases in two films
Optical cement between layer.By meeting it preferably and being wanted to frivolous property in this manner, the thickness of flexible die group can be effectively reduced
Seek higher application scenarios.
As a kind of preferred embodiment of the invention, interior zone in raised engaging portion 20, every one first protrusion 211
There are three the second protrusion 221 being adjacent, this three the second protrusions 22 to be distributed on three vertex of an equilateral triangle for tool；Often
For one second protrusion, 221 tool there are three the first protrusion 211 being adjacent, this three the first protrusions 211 are also distributed in one positive three
On angular three vertex.In conjunction with shown in Fig. 6 and Fig. 9, it is several first protrusion 211 and several second protrusions 221 in uniformly etc. between
Away from distribution, it is based on this, is formed between several first protrusions 211 and several second protrusions 221 and stablizes containing relationship, in flexible die group
When bending, the shearing force between the first film layer 21 and the second film layer 22 can be evenly dispersed by raised 20 different zones of engaging portion.
As shown in connection with fig. 5, the first protrusion 211 in the present invention is in prism-frustum-shaped or round table-like with the second protrusion 221,
In, the base area of the first protrusion 211 and the second protrusion 221 is greater than top surface area.In other words, the first protrusion 211 and second
Protrusion 221 is gradually reduced in respectively protruding out the area of section to be formed on direction, and such first film layer 21 and the second film layer 22 are more
It is easy to be bonded and to form such as Fig. 6, engomphosis relation shown in Fig. 9 between the first protrusion 211 and the second protrusion 221.
To enable raised engaging portion 20 preferably to inhibit Relative sliding between two film layer contact surfaces, and avoid making two
The thickness of film layer is excessively thick, and the ratio between thickness of the first protrusion 211 and the first film layer 21 range is between 1:5 to 1:2, the second protrusion
221 and second film layer 22 the ratio between thickness range between 1:5 to 1:2.
Height (i.e. thickness) range that protrudes out of the first protrusion 211 and the second protrusion 221 in the present invention is 5~20 μm.Such as
In specific implementation process shown in Fig. 5, the height h1 that protrudes out of the second protrusion 221 is preferably 12 μm, it is usual first protrusion 211 have with
Second protrusion 221 it is identical protrude out height.The present invention the first protrusion 211 and the other tools for specifically protruding out height of the second protrusion 221
Body parameter does not enumerate herein.
As the preferred embodiment of the present invention, refering to what is shown in Fig. 5, the top surface of the first protrusion 211 in the present invention and the
It is formed with the first top chamber 220 between two film layers 22, the second top chamber is formed between the top surface of the second protrusion 221 and the first film layer 21
210.In this way, first raised 211 and second is convex when the first protrusion 211 of flexible die group bending and the second protrusion 221 are squeezed
221 are played in addition to adaptively deforming according to pressure and to 200 inside projection of side chamber, chamber 220 can also be pushed up to first respectively
And the second top 210 inside projection of chamber, and then the first protrusion 211 and the second protrusion 221 are avoided in flexible die group bending process completely
Influence of the deformation to flexible die group thickness.
Corresponding to the parameter setting of the first protrusion 211 and the second raised 221 projection height in the present invention, the first top chamber 220
With second top chamber 210 in the depth bounds on flexible die group thickness direction be 0.5~3 μm.Specifically in embodiment illustrated in fig. 5,
Second top chamber 210 is preferably 1.6 μm in the thickness h 2 on flexible die group thickness direction, and usual first top chamber 220 has and second
Push up the identical depth dimensions of chamber 210.The present invention first pushes up chamber 220 and pushes up chamber 210 in its on flexible die group thickness direction with second
Its specific depth dimensions does not enumerate herein.
In the present invention, the preferable shape of the first protrusion 211 and the second protrusion 221 is positive six prism-frustum-shapeds and round table-like, with
It is lower that two kinds of embodiments will be described in detail respectively.
With reference to shown in Fig. 6, Fig. 7, Fig. 8, in this present embodiment, the first raised 211 and second protrusion 221 is in positive six rib
Platform, the interior zone in raised engaging portion 20, three the second protrusions 221 abutted with every one first protrusion 211 are abutted to this
First raised 211 3 non-conterminous side walls are abutted with three adjacent the first protrusions 211 of every one second protrusion 221 to second
Raised 221 3 non-conterminous side walls.The first adjacent protrusion 211 and the second protrusion 221 are with face and face i.e. in the present embodiment
The mode being in contact cooperates.
In the specific implementation process, the bottom surface side size range of the first protrusion 211 and the second protrusion 221 is 2~5 μm, top
Face side size range is 1.3~3 μm.With reference to shown in Fig. 8, in this specific embodiment, the side of the first raised 211 bottom surfaces 2111
A length of 3.5 μm, the side length of top surface 2112 is 1.6 μm；Bottom surface, the top surface of second protrusion 221 are preferably dimensioned to be and the first protrusion 211
Bottom surface, top surface size it is consistent.
With reference to shown in Fig. 9, Figure 10, Figure 11, in this present embodiment, the first protrusion 211 and the second protrusion 221 are in rotary table
The bottom surface radius of shape, the first protrusion 211 and the second protrusion 221 is 3~7 μm, and top surface radius is 2~5 μm.Ginseng
It examines shown in Figure 11, in this specific embodiment, the radius of the first raised 211 bottom surfaces 2111 is 5 μm, and the radius of top surface 2112 is
3.5μm；Bottom surface, the top surface of second protrusion 221 are preferably dimensioned to be consistent with the bottom surface of the first protrusion 211, top surface size.
Based on above first protrusion 211 and the second raised specific design shape of 221 both the above, first raised 211 and the
Cooperation between two protrusions 221 is relatively stable, it can be ensured that Flexible formwork assembly can quickly restore to the original state after bending is repeated several times.
It in the specific implementation process, can be between the first film layer 21 and the second film layer 22 of flexible die group involved in the present invention
Fitting is realized in such a way that vacuum suction is bonded；For the quality for advanced optimizing flexible die group, the first film layer of flexible die group 21
Also there is the optical cement of layer at other positions between the second film layer 22 in addition to raised engaging portion 20.
Flexible die group involved in the present invention can be used as the light emission side element of display device, preferably,
Raised engaging portion 20 takes shape at the marginal position of flexible die group.With reference to shown in Figure 12, Figure 13, raised engaging portion 20 is continuously shaped
In flexible die group four side edge or only take shape in a pair of of side edge of flexible die group.Flexibility is taken shape in view of raised engaging portion 20
At the marginal position of mould group.In the specific implementation process, raised engaging portion 20 may be disposed at outside the picture range of display device, such as
This its will not the imaging picture to display device impact, and the preferable translucent effect in flexible die group intermediate region can be effective
Guarantee the image quality of display device.
With reference to shown in Figure 14, the present invention also provides a kind of display panel, the display device have more than flexible die group.
Specifically in this present embodiment, the first film layer 21 for constituting flexible die group is layer of polarizer, and the second film layer 22 is touch control layer.Except this
Outside, display device further includes display panel 23 on the downside of the layer of polarizer and the cover board 24 for being attached at touch control layer upper surface,
Wherein display panel 23 can be oled panel.
In addition, the display device at least has Figure 14 institute the present invention also provides a kind of display device (not shown)
The display panel of displaying.
Of course, it should be understood that in other embodiments of the invention, display device is not limited to structure shown in Figure 14, soft
Property mould group is also not limited to layer of polarizer and touch control layer, i.e., in other design structures of limits device, the first film layer 21, second
Film layer 22 can also be other film layers being bonded to each other, and not be unfolded one by one herein specifically.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of flexible die group, the first film layer and the second film layer including fitting setting, which is characterized in that first film layer with
Two surfaces that second film layer fits are at least partially formed with raised engaging portion, and the protrusion engaging portion includes several intervals
The second protrusion that the first protrusion and several intervals being formed in first film layer are formed in second film layer, it is described
First protrusion and second protrusion are fixed to each other clamping.
2. flexible die group according to claim 1, which is characterized in that each first protrusion be located at least three with
Between its second protrusion abutted, each second protrusion is located at least three first protrusions being adjacent
Between.
3. flexible die group according to claim 1 or 2, which is characterized in that the protrusion engaging portion also has several by institute
It states the first protrusion and encloses the side chamber for setting and being formed with the described second raised side wall；Preferably, each described first is raised and each described
Second protrusion is abutted at least one described side chamber.
4. flexible die group according to claim 1, which is characterized in that the interior zone in the raised engaging portion, it is each
There are three the first protrusion tools is adjacent and is distributed in second protrusion on three vertex of equilateral triangle, each described
There are three be adjacent and be distributed in first protrusion on three vertex of equilateral triangle for second protrusion tool.
5. flexible die group according to claim 2, which is characterized in that first protrusion is in rib with second protrusion
Mesa-shaped is round table-like, and the base area of first protrusion and second protrusion is greater than top surface area；Preferably, described
The ratio between one protrusion and the thickness of first film layer and the ratio between second protrusion and the thickness of second film layer are in 1:5
To between 1:2.
6. flexible die group according to claim 5, which is characterized in that the top surface of first protrusion and second film layer
Between be formed with the first top chamber, be formed with the second top chamber between the top surface and first film layer of second protrusion.
7. flexible die group according to claim 5 or 6, which is characterized in that first protrusion and second protrusion are equal
In positive six prism-frustum-shaped, interior zone in the raised engaging portion, adjacent three described second with each first protrusion
Protrusion is abutted to described in this first raised three non-conterminous side walls, and adjacent three described first with each second protrusion
Protrusion is abutted to described second raised three non-conterminous side walls.
8. flexible die group described in -7 any one according to claim 1, which is characterized in that the protrusion engaging portion takes shape in institute
At the marginal position for stating flexible die group.
9. a kind of display panel comprising flexible die group described in any one of claims 1 to 8, first film layer is inclined
Light film, second film layer are touch control film.
10. a kind of display device, which is characterized in that the display device at least has display panel described in claim 9.
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| CN201811504044.2A CN109448557B (en) | 2018-12-10 | 2018-12-10 | Flexible module, display panel and display device with display panel |
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| CN201811504044.2A CN109448557B (en) | 2018-12-10 | 2018-12-10 | Flexible module, display panel and display device with display panel |
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| CN108346376A (en) * | 2018-01-19 | 2018-07-31 | 昆山国显光电有限公司 | Flexible module and flexible display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634407A (en) * | 2019-09-26 | 2019-12-31 | 云谷（固安）科技有限公司 | Winding mechanism and winding type display terminal |
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| CN109448557B (en) | 2021-04-30 |
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Application publication date: 20190308 Assignee: Bazhou Yungu Electronic Technology Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd.|Kunshan Guoxian photoelectric Co., Ltd Assignor: The valley (Guan) Technology Co. Ltd. Contract record no.: X2019990000155 Denomination of invention: Flexible module, display panel and display device with display panel License type: Common License Record date: 20191030 |
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Effective date of registration: 20191210 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co., Ltd Address before: 065500 Hebei Langfang County Guan emerging industry demonstration area Applicant before: The valley (Guan) Technology Co. Ltd. |
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