CN108267810A - A kind of light guide plate, backlight module and display equipment - Google Patents
A kind of light guide plate, backlight module and display equipment Download PDFInfo
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- CN108267810A CN108267810A CN201810176070.0A CN201810176070A CN108267810A CN 108267810 A CN108267810 A CN 108267810A CN 201810176070 A CN201810176070 A CN 201810176070A CN 108267810 A CN108267810 A CN 108267810A
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- light guide
- guide plate
- diffusion particle
- light
- distance
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of light guide plate, backlight module and display equipment, are related to technical field of liquid crystal display.Light guide plate provided by the invention, including plate body, the side of the plate body is incidence surface, and diffusion particle is provided at top surface or bottom surface in the plate body.The light guide plate replaces the site of conventional light guide plate surface by its internal diffusion particle, the total reflection inside light guide plate is destroyed, so as to ensure that light is projected by light guide plate.Diffusion particle can be integrally formed with plate body, reduce the technological process of light guide plate, advantageously reduce the bearing cost of light guide plate, and diffusion particle is set to the inside of plate body, the visual effect problem caused due to the abrasion of site is when reasons in conventional light guiding plate can be avoided the occurrence of, be conducive to improve the reliability and stability of backlight module, improve the usage experience of user.
Description
Technical field
The present invention relates to a kind of technical field of liquid crystal display more particularly to light guide plate, backlight module and display equipment.
Background technology
Display equipment is a kind of exportable image or the equipment for feeling information.Common display equipment is by mobile phone, computer, aobvious
Show device, TV, advertisement machine etc..Traditional display equipment generally comprises display panel and backlight module.Due to display panel in itself
It cannot actively shine, it is therefore desirable to which backlight module provides uniform light-emitting surface for display panel.Backlight module is generally divided into side and enters
Formula backlight module and down straight aphototropism mode set.Side entrance back module includes light source and the backboard stacked successively, reflector plate, leads
Tabula rasa, optical diaphragm, center, the side of light guide plate is incidence surface, and top surface is light-emitting surface, and light source is oppositely arranged with incidence surface.Light
Source generally uses cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL) or LED light bar, due to
CCFL and LED light bar are line source, therefore line source is exactly converted to area source by the major function of backlight module.
It is light guide plate by the main devices that line source is converted to area source in backlight module.The light that light source is sent out is by entering
Smooth surface enters the inside of light guide plate, and the light-emitting surface through light guide plate projects.If the top surface and top surface of light guide plate are smooth plane,
It will be totally reflected into the light inside light guide plate, cause light that can not be projected by light-emitting surface, therefore traditional light guide plate
Bottom surface needs to print ink site, the total reflection inside light guide plate is destroyed, so that light is projected by light-emitting surface.By adjusting ink
Proportioning, size and the spacing of site can also obtain uniform area source.
However in traditional light guide plate process, need after flat plate is made and is cut, then carry out site making,
Technological process increases, and cost also accordingly increases.And with the proposition of the design concepts such as the display ultra-thin ultra-narrow of equipment, to backlight module
In each device reliability requirement it is also higher and higher.In product development process, since site is located at the outside of light guide plate, often
Occur caused by site visual effect problem, such as site be scraped off or wipe caused hickie, site and sheet emitting absorption, because
Display brightness caused by site is uneven, visual effect problem etc. because caused by light source heat radiation bottleneck leads to Net points deformation, significantly
Reduce the quality of backlight module.
Invention content
An object of the present invention is to provide a kind of light guide plates, reduce the technological process of light guide plate, advantageously reduce and lead
The cost of manufacture of tabula rasa, while it effectively prevent the visual effect problem caused due to site.
For this purpose, the present invention uses following technical scheme：
A kind of light guide plate, including plate body, the side of the plate body is incidence surface, close to top surface and/or bottom in the plate body
Diffusion particle is provided at face.
Wherein, distance of the diffusion particle away from top surface or bottom surface is not more than 0.2mm.
Wherein, the diffusion particle includes one or more in bubble, organic filler, inorganic particulate.
Wherein, when the diffusion particle is organic filler and/or inorganic particulate, the fusing point of the diffusion particle is more than
160℃。
Wherein, when the grain size of the diffusion particle is identical, the distribution density of the diffusion particle and the diffusion particle
Distance away from distance light side meets such as minor function：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x be distance of the diffusion particle away from distance light side, y be diffusion particle distribution density, a, b, c, d, e, f,
G, h, i, j, k are constant.
Wherein, when the distribution density of the diffusion particle is identical, the grain size of the diffusion particle and the diffusion particle
Distance away from distance light side meets such as minor function：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x be distance of the diffusion particle away from distance light side, y be diffusion particle grain size, a, b, c, d, e, f, g, h,
I, j, k are constant.
Wherein, the grain size of the diffusion particle is 1 μm -100 μm.
Wherein, the spacing of the adjacent diffusion particle is 10 μm -500 μm.
It is another object of the present invention to propose a kind of backlight module, the cost of the backlight module is low, can effectively prevent
The visual effect problem only caused due to site improves the reliability and stability of backlight module.
For this purpose, the present invention uses following technical scheme：
A kind of backlight module, including light guide plate as described above.
Another object of the present invention is to propose a kind of display equipment, and the cost of the display equipment is low, can reduce out
The risk of existing visual effect problem, display effect is good, is conducive to improve the usage experience of user.
For this purpose, the present invention uses following technical scheme：
A kind of display equipment, including above-mentioned backlight module.
Advantageous effect：The present invention provides a kind of light guide plate, backlight module and display equipment.Leaded light provided by the invention
Plate, including plate body, the side of the plate body is incidence surface, and diffusion particle is provided at top surface or bottom surface in the plate body.
The light guide plate replaces the site of conventional light guide plate surface by its internal diffusion particle, destroys the total reflection inside light guide plate,
So as to ensure that light is projected by light guide plate.Diffusion particle can be integrally formed with plate body, reduce the technological process of light guide plate, have
Conducive to the bearing cost for reducing light guide plate, and diffusion particle is set to the inside of plate body, can avoid the occurrence of in conventional light guiding plate
The visual effect problem caused due to the abrasion of site is when reasons is conducive to improve the reliability and stability of backlight module, improves and use
The usage experience at family.
Description of the drawings
Fig. 1 is the explosive view for the display equipment that the embodiment of the present invention 1 provides；
Fig. 2 is the front view one for the light guide plate that the embodiment of the present invention 1 provides；
Fig. 3 is the vertical view of light guide plate described in Fig. 2；
Fig. 4 is the front view two for the light guide plate that the embodiment of the present invention 1 provides；
Fig. 5 is the vertical view of light guide plate described in Fig. 4.
Fig. 6 is the relation curve of light extraction efficiency and diffusion particle distributed depth that the embodiment of the present invention 1 provides；
Fig. 7 is the distribution density of distance and diffusion particle of the diffusion particle away from distance light side that the embodiment of the present invention 1 provides
Relation curve one；
Fig. 8 is the distribution density of distance and diffusion particle of the diffusion particle away from distance light side that the embodiment of the present invention 1 provides
Relation curve two；
Wherein：
1st, lamp source；2nd, backboard；3rd, reflector plate；4th, light guide plate；41st, diffusion particle；5th, optical diaphragm；6th, center；7th, it shows
Panel；8th, front frame.
Specific embodiment
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution further illustrated the present invention with reference to attached drawing and by specific embodiment.
Embodiment 1
A kind of display equipment is present embodiments provided, as shown in Figure 1, it includes the backlight module of side entering type and display panel
7.Backlight module includes light source and the backboard 2, reflector plate 3, light guide plate 4, optical diaphragm 5 and the center 6 that stack successively.Light source can
Think CCFL or LED light bar, the incidence surface of light source and light guide plate 4 is oppositely arranged.The side of light guide plate 4 be incidence surface, light guide plate 4
It can be that bilateral enters light, or single-sided illumination.The top surface of light guide plate 4 is light-emitting surface.Center 6 is fixed with backboard 2, thus will
Reflector plate 3, light guide plate 4 and optical diaphragm 5 are fixed.Display panel 7 is set on center 6, and front frame 8 is provided on display panel 7,
Display panel 7 is fixed with backlight module by front frame 8, so as to form the display module of display equipment.
In order to solve the problems, such as in traditional display equipment the visual effect because of caused by the site on light guide plate 4, such as Fig. 3-Fig. 5 institutes
Show, the structure of light guide plate 4 is improved in the present embodiment, the site on conventional light guiding plate 4 is replaced by diffusion particle 41.Specifically
Ground, light guide plate 4 include plate body, and the side of plate body is incidence surface, and top surface is light-emitting surface.The inside of plate body is close to the position of bottom surface
Place is provided with diffusion particle 41, and diffusion particle 41 can destroy total reflection of the light inside plate body, so as to make light by leaded light
The injection of plate 4 forms area source.Diffusion particle 41 can be inside addition such as plate body during plate body injection molding, due to diffusion
Particle 41 is in the inside of plate body, and compared to the site on conventional light guiding plate 4, diffusion particle 41 is not in abrasion or that rubs ask
Topic, is also not easy temperature distortion due to light source heat radiation bottleneck, so as to ensure that the stabilization of the quality of light guide plate 4 and backlight module
Property and reliability, avoid display equipment there is the visual effect problem because of caused by site, be conducive to improve user usage experience.
Certainly, in other embodiments, diffusion particle 41 can also inside arranging plate body close to the region of top surface or
Diffusion particle 41 is both provided with close to top surface and close to the position of bottom surface inside plate body, specific setting can be according to actual conditions
It is adjusted.
Diffusion particle 41 can be BaSO in the present embodiment4、CaCO3、TiO2、SiO2Wait inorganic particulates, or polyamides
Inorganic particulate made of amine fiber, diffusion particle 41 can also be small bubble or inorganic particulate, organic filler and blistering
In it is two or more, as long as the total reflection of 4 internal light of light guide plate can be destroyed.
Due to the needs of diffusion particle 41 and plate body injection molding together, when diffusion particle 41 is organic filler or inorganic
During particle, the fusing point requirement of diffusion particle 41 is more than 160 DEG C, prevents the organic filler during light guide plate 4 is made from melting.
In order to make light that can obtain uniform area source after light guide plate 4, by constantly testing and simulating adjustment
It learns, can uniform area source be obtained according to the particle size and distribution density of adjustment diffusion particle 41.
Specifically, the whole light extraction efficiency of light guide plate 4 is influenced close to distance of the diffusion particle 41 of plate body bottom surface away from bottom surface,
I.e. the light extraction efficiency of light guide plate 4 is related with depth of the diffusion particle 41 in plate body.Through researching and analysing, as shown in Figure 6, it is known that lead
The light extraction efficiency of tabula rasa 4 reduces with the increase of distance of the diffusion particle 41 away from top surface or bottom surface.When diffusion particle 41 is distributed depth
For degree when within 0.2mm, for the light extraction efficiency of light guide plate 4 more than 90%, light extraction efficiency is preferable, therefore diffusion particle 41 is away from bottom surface
Distance be desirably no more than 0.2mm.The distance between preferred diffusion particle 41 and bottom surface are 0.1mm in the present embodiment, are led at this time
The light extraction efficiency of tabula rasa 4 is higher, and the manufacture difficulty of light guide plate 4 is relatively low.In other embodiments, diffusion particle 41 is away from bottom surface
Distance can also be chosen according to actual conditions, such as be chosen for 0.05mm, 0.07mm, 0.09mm, 0.11mm, 0.13mm, 0.15mm,
0.17mm, 0.19mm etc..
Since the incidence surface of light guide plate 4 is oppositely arranged with light source, light guide plate 4 close to incidence surface zonal ray compared with
By force, the zonal ray of separate incident side is weaker.The uniformity of area source is formed to improve 4 light-emitting surface of light guide plate, light should be made
It is projected after the side transmission far from incidence surface by the light-emitting surface of light guide plate 4 as possible.Therefore, in the grain size for ensureing diffusion particle 41
Under the premise of consistent, the distribution density of diffusion particle 41 should gradually increase along the direction far from incidence surface so that close to incidence surface
The total reflecting destructive degree of side light is relatively weak, and the total reflecting destructive degree far from incidence surface side light is relatively strong,
So as to balance the light intensity of the light-emitting surface of light guide plate 4 injection, to improve the uniformity of area source.
According to above-mentioned principle, for diffusion particle 41 under the premise of grain size is identical, the density Ying Suiyu of diffusion particle 41 enters light
Identity distance from increase and increase, thus during simulation obtains density fonction, choose the form of power function, specifically
Ground, distribution density and distance of the diffusion particle 41 away from distance light side of diffusion particle 41 can meet such as minor function：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x is distance of the diffusion particle 41 away from distance light side, and distance light side refers to the side far from light guide plate 4, such as Fig. 3 institutes
Show, when light guide plate 4 is single-sided illumination, distance light side is the side opposite with the incidence surface of light guide plate 4；As shown in figure 5, when leaded light
Plate 4 enters light for bilateral, and when two incidence surfaces are oppositely arranged, and distance light side is the central plane among two incident sides.Y is
The distribution density of diffusion particle 41, meaning are the area shared by diffusion particle 41 in unit area.a、b、c、d、e、f、g、h、
I, j, k are constant, can be adjusted according to the actual size and performance requirement of light guide plate 4, to ensure diffusion particle 41
Even density transition.Such as when it is 32 cun to show equipment, corresponding function is as follows
Y=-4.7 × 10-8x6+1.4×10-6x5-1.3×10-5x4-5.6×10-5x3+0.0025x2-0.0227x+
0.1630
Relation curve such as Fig. 7 institutes of the distribution density of diffusion particle 41 and distance of the diffusion particle 41 away from distance light side at this time
Show, it is known that with the increase of diffusion particle 41 and the distance of close incidence surface, the distribution density of diffusion particle 41 gradually increases,
Sparse, the distribution comparatively dense of regional diffusion particle 41 far from incidence surface is distributed close to the regional diffusion particle 41 of incidence surface,
So as to ensure the uniformity of the area source of light guide plate 4；When it is 55 cun to show equipment, corresponding function is as follows
Y=-7.08 × 10-17x6+3.6×10-14x5+3.8×10-13x4-2.9×10-9x3+1.2×10-6x2-0.0005x
+0.1626
Relation curve such as Fig. 8 institutes of the distribution density of diffusion particle 41 and distance of the diffusion particle 41 away from distance light side at this time
Show.By the concentration of function adjustment diffusion particle 41, it is ensured that the light-emitting uniformity of light guide plate 4.
In order to reduce the difficulty of processing of light guide plate 4 and ensure the uniformity of 4 area source of light guide plate, adjacent diffusion particle 41
Between spacing can be 10 μm -500 μm, such as can be chosen for 10 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm,
300μm、350μm、400μm、450μm、500μm.Specifically, it can be determined according to the concentration of diffusion particle 41, adjacent diffusion grain
Spacing between son 41 is gradually increased by lateral 4 center of light guide plate close to incidence surface.
The grain size of diffusion particle 41 can be 1 μm -100 μm in the present embodiment, such as can be chosen for 1 μm, 10 μm, 20 μ
m、30μm、40μm、50μm、60μm、70μm、80μm、90μm、100μm.The grain size of diffusion particle 41 can be selected according to actual conditions
It takes.
Diffusion particle 41 in the present embodiment in light guide plate 4 can add during plate body injection molding, and according to
Need the distribution density and spacing of control diffusion particle 41.Specifically, light guide plate 4 generally uses polymethyl methacrylate
(Polymethyl Methacrylate, PMMA), makrolon (Polycarbonate, PC) or polystyrene plastics
(General Purpose Polystyrene, PC) is as base material.When making light guide plate 4 provided in this embodiment, first to
The base material melted material doped with a certain concentration diffusion particle 41 is poured into mold, the melted material of pure base material is poured into mould later
In tool so that there are diffusion particles 41 close to the position of bottom surface for 4 inside of light guide plate after cooling and shaping.It is poured into mold by control
Doped with distance of how much control granule proliferations apart from plank bottom surface of the material of diffusion particle 41, and by melted material
The concentration variation of diffusion particle 41 in the concentration control light guide plate 4 of the diffusion particle 41 of doping.
In the present embodiment, light guide plate 4 can also be Wedge shape light conduction board 4.Specifically, the top surface of plate body is plane, and bottom surface is
Inclined-plane, and it is larger close to the thickness of incidence surface side plate body.The light-emitting surface of light guide plate 4 can be plane, can also be provided with convex
Rise etc. micro-structures, so as to obtain better area source.
Embodiment 2
A kind of display equipment is present embodiments provided, structure is roughly the same with the structure in embodiment 1, with embodiment 1
In unlike, the distribution density of diffusion particle 41 is identical everywhere in light guide plate 4 in the present embodiment, i.e., diffusion particle 41 uniformly point
Cloth, for light guide plate 4 is made to obtain uniform area source effect, the particle size of the diffusion particle 41 in the present embodiment light guide plate 4 is
Variation.Specifically, to make the total reflecting destructive degree close to incidence surface side light relatively weak, far from one sidelight of incidence surface
The total reflecting destructive degree of line is relatively strong, so as to balance the light intensity of the light-emitting surface of light guide plate 4 injection, 41 edge of diffusion particle
Grain size should gradually increase on direction far from incidence surface, so as to improve the light-emitting uniformity of light guide plate 4.
The grain size of diffusion particle 41 can meet such as with distance of the diffusion particle 41 away from close incidence surface in the present embodiment
Minor function：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x be distance of the diffusion particle 41 away from close incidence surface, y be diffusion particle 41 grain size, a, b, c, d, e,
F, g, h, i, j, k are constant, can be adjusted according to the actual size and performance requirement of light guide plate 4.Above-mentioned function and reality
The distribution density function for applying diffusion particle 41 in example 1 is identical, it is known that along the direction far from incidence surface, the grain size ruler of diffusion particle 41
Very little gradual increase, so as to so that light guide plate 4 forms the area source of uniformly light-emitting.
More than content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes, the content of the present specification should not be construed as to the present invention in specific embodiments and applications
Limitation.
Claims (10)
1. a kind of light guide plate, which is characterized in that including plate body, the side of the plate body is incidence surface, close to top in the plate body
Diffusion particle (41) is provided at face and/or bottom surface.
2. light guide plate as described in claim 1, which is characterized in that the distance of the diffusion particle (41) away from top surface or bottom surface is not
More than 0.2mm.
3. light guide plate as described in claim 1, which is characterized in that the diffusion particle (41) includes bubble, organic filler, nothing
It is one or more in machine particle.
4. light guide plate as claimed in claim 3, which is characterized in that when the diffusion particle (41) is organic filler and/or nothing
During machine particle, the fusing point of the diffusion particle (41) is more than 160 DEG C.
5. light guide plate as described in claim 1, which is characterized in that described when the grain size of the diffusion particle (41) is identical
The distribution density of diffusion particle (41) meets such as minor function with distance of the diffusion particle (41) away from distance light side：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x be the distance of the diffusion particle (41) away from distance light side, y be diffusion particle (41) distribution density, a, b, c, d,
E, f, g, h, i, j, k are constant.
6. light guide plate as described in claim 1, which is characterized in that when the distribution density of the diffusion particle (41) is identical,
The grain size of the diffusion particle (41) meets such as minor function with distance of the diffusion particle (41) away from distance light side：
Y=ax10+bx9+cx8+dx7+ex6+fx5+gx4+hx3+ix2+jx+k
Wherein, x be the distance of the diffusion particle (41) away from distance light side, y be diffusion particle (41) grain size, a, b, c, d, e, f,
G, h, i, j, k are constant.
7. light guide plate as described in claim 1, which is characterized in that the grain size of the diffusion particle (41) is 1 μm -100 μm.
8. light guide plate as described in claim 1, which is characterized in that the spacing of the adjacent diffusion particle (41) is 10 μm -500
μm。
9. a kind of backlight module, which is characterized in that including the light guide plate (4) as described in any one of claim 1-8.
10. a kind of display equipment, which is characterized in that including backlight module as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176070.0A CN108267810A (en) | 2018-03-02 | 2018-03-02 | A kind of light guide plate, backlight module and display equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810176070.0A CN108267810A (en) | 2018-03-02 | 2018-03-02 | A kind of light guide plate, backlight module and display equipment |
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| CN108267810A true CN108267810A (en) | 2018-07-10 |
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ID=62774492
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| CN201810176070.0A Pending CN108267810A (en) | 2018-03-02 | 2018-03-02 | A kind of light guide plate, backlight module and display equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594358A (en) * | 2018-07-17 | 2018-09-28 | 惠科股份有限公司 | Light guide plate and display device |
| CN108873152A (en) * | 2018-07-17 | 2018-11-23 | 惠科股份有限公司 | The production method of the production method and display device of light guide plate |
| WO2020015329A1 (en) * | 2018-07-17 | 2020-01-23 | 惠科股份有限公司 | Light guide plate and display device |
| CN113267935A (en) * | 2021-01-05 | 2021-08-17 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
| CN114253028A (en) * | 2021-12-15 | 2022-03-29 | 合肥联宝信息技术有限公司 | Display device of electronic equipment and electronic equipment |
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