CN108873463A - Display panel, liquid crystal display and display panel production method - Google Patents
Display panel, liquid crystal display and display panel production method Download PDFInfo
- Publication number
- CN108873463A CN108873463A CN201810835544.8A CN201810835544A CN108873463A CN 108873463 A CN108873463 A CN 108873463A CN 201810835544 A CN201810835544 A CN 201810835544A CN 108873463 A CN108873463 A CN 108873463A
- Authority
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- China
- Prior art keywords
- recess portion
- display panel
- glue frame
- black matrix
- color membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 8
- 239000000758 substrate Substances 0.000 claims abstract description 100
- 239000003292 glue Substances 0.000 claims abstract description 65
- 239000012528 membrane Substances 0.000 claims abstract description 37
- 239000011159 matrix material Substances 0.000 claims abstract description 34
- 239000000084 colloidal system Substances 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 7
- 238000009738 saturating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000001723 curing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention mentions a kind of display panel, including array substrate, color membrane substrates and the glue frame for connecting array substrate and color membrane substrates periphery, the glue frame is located at the non-display area of the display panel, and the framework including corner and connection corner, and it is located in the non-display area, the color membrane substrates are equipped with black matrix layer towards the surface of array substrate, the black matrix layer opposite with the angular position is concavely provided with recess portion, the side of glue frame corner towards the color membrane substrates is formed in the recess portion, and is curved surface with the linkage interface of the recess portion.
Description
Technical field
The present invention relates to display screen technology field, in particular to a kind of display panel, liquid crystal display and display panel system
Make method.
Background technique
Liquid crystal display panel in actual production, cuts to be formed by big plate, and in big plate manufacturing process, each liquid crystal
Have big plate overturning processing procedure together after the glue frame SUV solidification of panel, when overturning first rotates the fixation of big plate sandwich again.And it is right
It is also easy to produce stress in different sized panel stitching portions to concentrate, only UV solidifies glue frame, and adhesion is weaker, so that stitching portion glue frame be made to hold
Bubble easily generated influences display panel quality.
Summary of the invention
The purpose of the present invention is to provide one kind to prevent display panel glue frame in manufacturing process from encapsulating unstable display surface
Board manufacturing method.
The present invention also provides a kind of display panel and liquid crystal displays.
Display panel of the present invention, including array substrate, color membrane substrates and connection array substrate and color membrane substrates week
The glue frame of edge, the glue frame are located at the non-display area of the display panel, and the framework including corner and connection corner,
And be located in the non-display area, the color membrane substrates are equipped with black matrix layer towards the surface of array substrate, with institute
It states the opposite black matrix layer of angular position and is concavely provided with recess portion, side shape of the glue frame corner towards the color membrane substrates
It in recess portion described in Cheng Yu, and is curved surface with the linkage interface of the recess portion.
Wherein, position opposite with the framework for connecting the corner in the black matrix layer is recessed with recess portion, the framework
It is formed in the recess portion towards the side of the color membrane substrates, the linkage interface of the framework and the recess portion is curved surface.
Wherein, the recess portion opposite with the angular position and the recess portion of the opposite position of framework are to the color membrane substrates side
It is the groove of rectangle, V-arrangement or arc to recessed section, even the cross sectional shape of recess portion can be identical can also be different.
Wherein, position opposite with the recess portion in the array substrate is convexly equipped with light transmission protrusion, and the light transmission protrusion is inserted
It is connected to side of the glue frame towards array substrate.
Wherein, the cross sectional shape of the light transmission protrusion is identical as the cross sectional shape of the recess portion, and the glue frame can be improved
With the pressing dynamics of recess portion linkage interface, guarantee to be completely combined.
Wherein, scattering particles are distributed in the light transmission protrusion, avoiding blocking makes the cured light of glue frame.
Wherein, the bottom thickness of the recess portion is more than or equal to 0.1um.Guarantee the shaded effect of black matrix.
Display panel production method of the present invention, including
The display panel predeterminable area of multiple matrix arrangements, the display panel predeterminable area are set on color film large substrates
All cause black matrix around being formed；
Recess portion is formed in the black matrix of the angular position of each display panel predeterminable area；The concave surface of the recess portion is song
Face；
Colloid is coated in the black matrix of each display panel predeterminable area periphery and by array large substrates pressure
Together on the color film large substrates, the colloid is formed by curing the color film large substrates connected in the display panel predeterminable area
With the glue frame of array large substrates；The recess portion wherein is filled up positioned at the colloid of recess portion, makes the linkage interface of the glue frame and recess portion
For curved surface.
Wherein, colloid is coated in the black matrix of each display panel predeterminable area periphery and by the big base of array
Plate is pressed on the step of color film large substrates and further includes,
It is first opposite with the recess portion in the black matrix of each display panel predeterminable area on the array large substrates
Position forms transparent protrusion identical with recess cross section shape, wherein scattering particles is distributed in transparent protrusion；
By the array large substrates be placed on it is described be coated on the color membrane substrates of colloid, in each display panel predeterminable area
Transparent protrusion press corresponding colloid into recess portion deformation occurs, make colloid full of entire recess portion, wherein the glue frame with it is described
The joint face shape of transparent protrusion is identical as the concave of the recess portion.
Recess portion, glue frame is arranged in the corresponding color membrane substrates junction of angular position of glue frame in display panel provided by the invention
Linkage interface with color membrane substrates is curved surface, combines compared to plane, increases bonded area, and then enhances glue frame and color film
The adhesion of substrate avoids glue frame in the production process and color membrane substrates junction from generating the bad phenomenons such as bubble.
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
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is display panel floor map provided in an embodiment of the present invention, can show glue frame position.
Fig. 2 is part-structure figure of the display panel described in Fig. 1 along the schematic cross-section in the direction II.
Fig. 3 is the schematic cross-section of another embodiment of display panel shown in FIG. 1, and wherein array substrate is equipped with saturating
Bright protrusion.
Fig. 4 is the another way schematic diagram of the transparent protrusion of display panel shown in Fig. 3.
Fig. 5 is part-structure figure of the display panel described in Fig. 1 along the schematic cross-section in the direction III.
Fig. 6 is the manufacturing process of the array large substrates and color film large substrates in display panel production method of the present invention
Simplified schematic diagram.
Fig. 7 is the flow chart of display panel production method of 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.
Fig. 1 and Fig. 2 are please referred to, the present invention provides a kind of display panel 10, including array substrate 11, color membrane substrates 12 and company
The glue frame 13 of 12 periphery of array substrate 11 and color membrane substrates is connect, the display panel 10 includes non-display area, the glue frame 13
Framework 132 in non-display area, and including corner 131 and connection corner.
In the non-display area, the color membrane substrates 12 are equipped with black matrix layer 14 towards the surface of array substrate 11,
The black matrix layer 14 opposite with 131 position of corner is concavely provided with recess portion 15, and the corner 131 of the glue frame 13 is towards institute
The side for stating color membrane substrates 12 is formed in the recess portion 15, and is curved surface with the linkage interface A of the recess portion 15.
Specifically, the glue frame 13 is rectangle, the corner 131 is two adjacent positions connected vertically of framework 132.
The recess portion 15 is the groove being arranged along 131 extending direction of corner into the color membrane substrates.The recess portion 15 is cut
Face is rectangle, V-arrangement or arc, it should be noted that the section of recess portion 15 is on the basis of the direction perpendicular to glue frame 13,
Cross section can be become, in the present embodiment, the cross section of the recess portion 15 is V-arrangement.The corner 131 position opposite with recess portion 15
It sets and is formed in recess portion 15 and fills up the recess portion 15, the corner 131 of glue frame 13 and the linkage interface A of recess portion 15 are V-arrangement, are compared
It is combined in plane, increases bonded area, and then enhance the adhesion of glue frame 13 Yu black matrix, avoid glue in the production process
Frame 13 and 12 junction of color membrane substrates generate the bad phenomenons such as bubble.
In the present embodiment, the bottom thickness D of the recess portion 15 is more than or equal to 0.1um, i.e., to guarantee that recess portion 15 cannot penetrate
The black matrix, and guarantee that reserved bottom thickness can normally realize the effect of shading.
In another embodiment, referring to Fig. 5, be the schematic cross-section in the direction display panel III shown in FIG. 1, and it is above-mentioned
Unlike embodiment, the position opposite with the framework 132 for connecting the corner 131 is recessed with recess portion in the black matrix layer 14
16, the side of the framework 132 towards the color membrane substrates 12 is formed in the recess portion 16, the framework 132 with it is described recessed
The linkage interface B in portion 16 is curved surface.Specifically, the recess portion 16 opposite with the framework 13 and the corner 131 are corresponding recessed
Portion 15 is connected to, that is to say, that position corresponding with the glue frame 13 is equipped with recess portion, 13 direction of glue frame in black matrix layer 14
The side of the color membrane substrates 12 is formed in the recess portion 15 and recess portion 16, increases the contact of glue frame 13 with color membrane substrates 12
Area, and then increase adhesion.Recess portion 15 corresponding with the corner 131 described in the present embodiment and opposite with the body 13
The cross section for the recess portion 16 answered is V-type.
, in the present embodiment, the position opposite with the recess portion 15 and/or recess portion 16 is convexly equipped in the array substrate 11
Light protrusion 17, the light transmission protrusion 17 are plugged in the glue frame 13 towards the side of array substrate 11.In Fig. 3 in the present embodiment
Shown in be, the opposite position of recess portion 15 corresponding with institute's corner 131 be equipped with the light transmission protrusion 17.In the array substrate 11
Compared to the position setting light transmission protrusion of glue frame, when array substrate 11 and color membrane substrates 12 encapsulate, array substrate 11 is pressed on
In uncured glue frame 13, the light transmission protrusion 17 compresses side of the glue frame 13 far from color membrane substrates 12, and squeezes into recess portion 15
Moulding frame 13 is full of the side of glue frame 13 in the entire recess portion 13, after solidification, the inner wall of the glue frame 13 and recess portion 15,
Namely the cell wall of groove combines and linkage interface is curved surface, so increases the contact area of glue frame 13 Yu color membrane substrates 12.
Further, scattering particles are distributed in the light transmission protrusion 17, mainly using transparent with scattering particles
Material is formed.When array substrate 11 is placed on glue frame 13, it is UV light in lightproof area that light transmission protrusion 17, which enhances the solidification of glue frame 13,
Conduction improves glue frame UV curing degree, avoids the light transmittance for influencing glue frame.
Further, such as Fig. 4, the cross sectional shape of the light transmission protrusion 17 is identical as the cross sectional shape of the recess portion 15.?
When array substrate 11 compresses glue frame 13, light transmission protrusion 17 pushes glue frame 13 to deform into recess portion 15, due to cutting for light transmission protrusion 17
Face shape is identical as the section of the recess portion 15, can improve the glue frame part between light transmission protrusion 17 and recess portion 15 to recess portion
Stress degree, uniformity and direction in 15 guarantee the adhesion strength of the linkage interface of glue frame 13 and recess portion 15.When framework 132
When being formed in recess portion 16, the cross sectional shape of 16 position of raised 17 corresponding recess of the light transmission and the cross sectional shape of the recess portion 16
It is identical.
In display panel of the present invention, the joint face of glue frame 13 and the color membrane substrates 12 is curved surface, increases glue
The contact surface of frame 13 and color membrane substrates 12, and then guarantee the adhesion strength between glue frame 13 and color membrane substrates and array substrate.
The present invention also provides a kind of liquid crystal displays with the display panel.
Fig. 6 and Fig. 7 are please referred to, the present invention also provides a kind of display panel production methods, can be used for making above-mentioned show
Show panel comprising：
Step S1 sets the display panel predeterminable area 50 of multiple matrix arrangements, the display on color film large substrates 40
All cause black matrix 14 of panel predeterminable area 50 are around formation.Wherein, the display panel predeterminable area 50 is for making list
A display panel.The peripheral shape is the profile of display panel.
Step S2 forms recess portion in the black matrix of the angular position 131 of each display panel predeterminable area 50；It is described recessed
The cross section in portion is curved surface.Curved surface is waveform, rectangle, V-arrangement etc..
Step S3 is coated with colloid and by array in the black matrix of each 50 periphery of display panel predeterminable area
Large substrates 30 are pressed on the color film large substrates 40, and the colloid, which is formed by curing, to be connected in the display panel predeterminable area 50
The glue frame 13 of color film large substrates 40 and array large substrates 30；The recess portion wherein is filled up positioned at the colloid of recess portion, makes the glue frame
13 with the linkage interface of recess portion be curved surface.The coloured silk film large substrates 40 and array large substrates 30 are big board status, can be with after encapsulation
Form the display panel of multiple matrix arrangements, later by cut to be formed it is recited above including color membrane substrates and array substrate
Display panel.
Wherein, it is applied on color film large substrates 40 after the pressing of array large substrates 30 in colloid, is first solidified using UV light,
Then it carries out overturning entire color film large substrates 40 and array large substrates 30 for subsequent technique, at this time due to glue frame and coloured silk
The linkage interface of film large substrates 40 is curved surface, and contact area is bigger, increases adhesion strength；The display panel of matrix arrangement is default
The opposite regional stress of the corner 131 of every four display panel predeterminable areas 50 in region 50 is concentrated, will not influence glue frame with
The adhesion strength of color film large substrates 40 in display panel predeterminable area 50, prevents the adhesion in subsequent processing step because of glue frame
Power not enough influences the encapsulation of each display panel.
In this step, the first black matrix on the array large substrates 30 with each display panel predeterminable area 50
On the opposite position of recess portion form transparent protrusion identical with recess cross section shape, wherein the transparent protrusion is with astigmatism
The transparent material of particle.
By the array large substrates 30 be placed on it is described be coated on the color film large substrates 40 of colloid, each display panel is default
Transparent protrusion in region 50 presses corresponding colloid into recess portion, and deformation occurs, makes colloid full of entire recess portion, wherein described
The joint face shape of glue frame and the transparent protrusion is identical as the concave of the recess portion.It should be noted that the big base of array
After plate 30 and color film large substrates 40 are encapsulated by glue frame, cut, each display panel predeterminable area 50 is cut into one and shows
Show panel, glue frame is located at the non-display area of each display panel.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (10)
1. a kind of display panel, which is characterized in that including array substrate, color membrane substrates and connection array substrate and color membrane substrates week
The glue frame of edge, the glue frame are located at the non-display area of the display panel, and the framework including corner and connection corner,
And be located in the non-display area, the color membrane substrates are equipped with black matrix layer towards the surface of array substrate, with described turn
The opposite black matrix layer of Angle Position is concavely provided with recess portion, and the side of glue frame corner towards the color membrane substrates is formed in
It in the recess portion, and is curved surface with the linkage interface of the recess portion.
2. display panel according to claim 1, which is characterized in that in the black matrix layer with the frame that connect the corner
The opposite position of body is recessed with recess portion, and the side of the framework towards the color membrane substrates is formed in the recess portion, the frame
The linkage interface of body and the recess portion is curved surface.
3. display panel according to claim 1 or 2, which is characterized in that recess portion corresponding with the corner and with institute
To state the corresponding recess portion of framework be to the recessed section in the color membrane substrates direction be rectangle, V-arrangement or arc groove.
4. display panel according to claim 1 or 2, which is characterized in that opposite with the recess portion in the array substrate
Position be convexly equipped with light transmission protrusion, the light transmission protrusion is plugged in side of the glue frame towards array substrate.
5. display panel according to claim 4, which is characterized in that the cross sectional shape and the recess portion of the light transmission protrusion
Cross sectional shape it is identical.
6. display panel according to claim 4, which is characterized in that scattering particles are distributed in the light transmission protrusion.
7. display panel according to claim 1 or 2, which is characterized in that the bottom thickness of the recess portion is more than or equal to
0.1um。
8. a kind of display panel production method, which is characterized in that including
The display panel predeterminable area of multiple matrix arrangements, the week of the display panel predeterminable area are set on color film large substrates
Cause black matrix is surrounded and is formed；
Recess portion is formed in the black matrix of the angular position of each display panel predeterminable area；The cross section of the recess portion is song
Face；
It is coated with colloid in the black matrix of each display panel predeterminable area periphery and is pressed on array large substrates
On the coloured silk film large substrates, the colloid is formed by curing the color film large substrates and the battle array connected in the display panel predeterminable area
The glue frame of column large substrates；The recess portion wherein is filled up positioned at the colloid of recess portion, keeps the linkage interface of the glue frame and recess portion bent
Face.
9. display panel production method according to claim 8, which is characterized in that in each display panel preset areas
It is coated with colloid in the black matrix of domain periphery and further includes by the step that array large substrates are pressed on the color film large substrates,
Position first opposite with the recess portion in the black matrix of each display panel predeterminable area on the array large substrates
Transparent protrusion identical with recess cross section shape is formed, wherein scattering particles is distributed in transparent protrusion；
By the array large substrates be placed on it is described be coated on the color membrane substrates of colloid, it is saturating in each display panel predeterminable area
Bright protrusion presses corresponding colloid into recess portion, and deformation occurs, makes colloid full of entire recess portion, wherein the glue frame with it is described transparent
The joint face shape of protrusion is identical as the concave of the recess portion.
10. a kind of liquid crystal display, which is characterized in that including any one of the claim 1-7 display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835544.8A CN108873463B (en) | 2018-07-26 | 2018-07-26 | Display panel, liquid crystal display and display panel manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810835544.8A CN108873463B (en) | 2018-07-26 | 2018-07-26 | Display panel, liquid crystal display and display panel manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108873463A true CN108873463A (en) | 2018-11-23 |
| CN108873463B CN108873463B (en) | 2021-05-28 |
Family
ID=64305495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810835544.8A Active CN108873463B (en) | 2018-07-26 | 2018-07-26 | Display panel, liquid crystal display and display panel manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108873463B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110471499A (en) * | 2019-07-24 | 2019-11-19 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
| CN113327511A (en) * | 2021-06-03 | 2021-08-31 | 业成科技（成都）有限公司 | Display device and electronic apparatus |
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| CN113327511B (en) * | 2021-06-03 | 2023-05-12 | 业成科技（成都）有限公司 | Display device and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108873463B (en) | 2021-05-28 |
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