CN102147488A - Diffusion plate of multilayered diffusion particle layer - Google Patents
Diffusion plate of multilayered diffusion particle layer Download PDFInfo
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- CN102147488A CN102147488A CN 201110059963 CN201110059963A CN102147488A CN 102147488 A CN102147488 A CN 102147488A CN 201110059963 CN201110059963 CN 201110059963 CN 201110059963 A CN201110059963 A CN 201110059963A CN 102147488 A CN102147488 A CN 102147488A
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Abstract
A diffusion plate of a multilayered diffusion particle layer belongs to the field of diffusion plates. The diffusion plate comprises a diffusion particle layer, a middle layer made of a transparent resin substrate, and a diffusion particle layer, namely the diffusion plate is in a sandwich structure. The basal bodies of two diffusion particle layers are made of high molecular light transparent materials; and diffusion particles and an ultraviolet absorber are dispersed in both of the two diffusion particle layers. At least one outer surface of the diffusion plate disclosed by the invention has a microstructure, so as to improve the luminous efficacy and the diffusion efficacy. Simultaneously, in consideration of the wider application range of the diffusion plate, the middle layer of the transparent resin substrate is manufactured into various curved surface shapes.
Description
Technical field
The present invention is a kind of diffuser plate of multilayer diffusion particle layer, is a kind ofly not only can apply to the diffuser plate of down straight aphototropism mode set but also can be used as secondary light-distribution lens of general lighting etc.The multilayer diffuser plate comprises one deck diffusion particle layer, the middle layer that layer of transparent resin substrate is made, one deck diffusion particle layer, i.e. sandwich structure.The matrix of two-layer diffusion particle layer is to make with the macromolecule light transmissive material, all scatters diffusion particle and ultraviolet absorber in it.At least one outside surface of diffuser plate of the present invention has microstructure, when dissimilar microstructure is provided, realizes different light extraction efficiency and outgoing light homogeneity.Transparent resin substrate has good transmittance and sufficient mechanical property, satisfying under the certain mechanical strength, by controlling the middle layer shape of transparent resin substrate, realize the diffuser plate of various curve forms, make diffuser plate of the present invention that wider usable range be arranged.
Background technology
The research of diffuser plate is mainly in LCD now.In LCD, liquid crystal panel itself is not had a lighting function, need realize Presentation Function so that light source to be provided by configuration backlight source module below liquid crystal panel.Diffuser plate is the vital part in the direct-light type LED backlight membrane module, its main effect is that pointolite or line source diffusion are become uniform surface light source, and can improve the direction of propagation efficiency of light energy utilization that is parallel to light, in the hope of improving light extraction efficiency and outgoing light homogeneity, reach the purpose that high-quality shows.
See also Fig. 1, it is the structural representation of the down straight aphototropism mode set of known techniques; As shown in the figure, general straight-down negative module, its structure have comprised a reflector plate 1, a plurality of light source 2, a light diffusing sheet 3, following diffusion barrier 4, prismatic lens 5, following diffusion barrier 6 etc.
The achievement in research of diffuser plate is mainly reflected at present: the first adds diffusion particle in diffuser plate; It two is to add microstructure on the diffuser plate surface; It three is: diffusion particle and microstructure are used in combination.The one diffuser plate intersperses among diffusion particle in the substrate, and with respect to substrate, diffusion particle has refractive index, and the energy refracted ray so that produce the light diffusion, is eliminated light and dark light source vestige.Because of wherein adding diffusion particle, given diffuser plate and had the light diffusivity, but inevitably had the absorption of diffusion particle light, cause light extraction efficiency to reduce.And diffuser plate is not only had the requirement of light-emitting uniformity, the light extraction efficiency of diffuser plate also is vital for LCD; The microstructure that its two diffuser plate relies on self surface fully do not have the absorption of conventional diffusion particle to light, but light extraction efficiency and outgoing light homogeneity does not realize good effect; Therefore its three diffuser plate is the focus that becomes present research, but achievement in research is few.
In recent years, the LED technology relies on advantages such as its long-life, high-level efficiency, fast, the low maintenance of response speed and low-power consumption, replaces CCFL gradually in the LCD industry to be widely used in large, medium and small sized panel backlight; At illuminating industry, also replace traditional illuminating lamp gradually.No matter and market is to replace the mainstream applications that CCFL becomes large, medium and small sized panel backlight or replaces traditional illuminating lamp etc. to following LED, still holds highly and expect.Along with the fierceness day by day of market competition, the backlight product of designing is most important concerning producer.In order to meet the requirements of lighting requirement, be applied in the normally complicated curve form of secondary light-distribution lens on the general lighting, finish processing difficulty to it, cost is also higher.Therefore the present invention is on the basis of existing achievement in research, a kind of diffuser plate of multilayer diffusion particle layer has been proposed, be a kind of lens type diffuser plate that not only can apply to the diffuser plate of straight type backlight module but also can be used as the general lighting secondary light-distribution, realize having widened when diffuser plate light extraction efficiency of the present invention and outgoing light homogeneity improve the usable range of diffuser plate.
Summary of the invention
One of purpose of the present invention is to provide a kind of diffuser plate of multilayer diffusion particle layer, can be used for LCD.Diffuser plate by multilayer diffusion particle layer of the present invention, pointolite or line source diffusion are become uniform surface light source, improve the direction of propagation efficiency of light energy utilization that is parallel to light, the purpose of realization raising light extraction efficiency and outgoing light homogeneity, reach the effect that high-quality shows.
Another object of the present invention is to provide a kind of diffuser plate of sandwich construction,, can realize the diffuser plate of all kinds curve form by the control of transparent resin substrate middle layer shape.The diffuser plate of multilayer diffusion particle layer of the present invention can be used as the lens of general lighting secondary light-distribution.Light incides diffuser plate, through the equalizing light rays that repeatedly the reflecting of the microstructure on diffuser plate surface, diffusion particle, microstructure, refraction and scattering process are sent light fixture, prevents that dazzle, irradiation are inhomogeneous, luminance shortage takes place.
For accomplishing the end in view, the diffuser plate that the invention provides multilayer diffusion particle layer is to utilize light to incide diffuser plate, through the microstructure on diffuser plate surface, makes light acquisition refraction repeatedly, transmission; By ground floor diffusion particle layer, make light obtain multidirectional reflection, refraction and scattering again, promote the effect of homogenising; By second layer diffusion particle layer, can make further homogenising of light; Last light leaves diffuser plate, through the diffuser plate surface micro-structure, refraction repeatedly takes place, and the transmission effect realizes that the emergence angle of light requires and further make equalizing light rays.Diffuser plate of the present invention reduces the energy loss of light because of the diffusion particle effect because of diffusion particle layer stratification, improves light permeable rate.There is microstructure at least one surface of diffuser plate, with by the exportable better light source of this microstructure, reaches the purpose that promotes diffuser plate light extraction efficiency and outgoing light homogeneity.
Multilayer diffuser plate provided by the invention is effectively guaranteeing to have under the prerequisite of good light extraction efficiency and outgoing light homogeneity, and diffuser plate has stronger uvioresistant receptivity.The diffuser plate of the multilayer diffusion particle layer that adopts, promptly two-layer diffusion particle layer is clipped on the transparent resin substrate, and transparent resin substrate has good transmittance and sufficient mechanical property, can be made into the middle layer of multiple curve form.The diffusion particle layer can be realized good light diffusion effect because of diffusion particle is arranged.At least one surface of diffuser plate has microstructure simultaneously, with by the exportable better light source of this microtexture, reaches the purpose that increases brightness and evenly spread light simultaneously.
By above-mentioned technological means, the present invention can improve the light extraction efficiency and the outgoing light homogeneity of diffuser plate.
Description of drawings
Fig. 1 is the structural representation of module backlight;
Fig. 2 is the structural representation of a preferred embodiment of the present invention;
Fig. 3 is the structural representation of a preferred embodiment of the present invention;
Fig. 4 is the structural representation of a preferred embodiment of the present invention;
Fig. 5 is the structural representation of a preferred embodiment of the present invention;
Fig. 6 is the structural representation of a preferred embodiment of the present invention;
Fig. 7 is the structural representation of a preferred embodiment of the present invention;
Fig. 8 is the structural representation of a preferred embodiment of the present invention;
Fig. 9 is the structural representation of a preferred embodiment of the present invention;
Figure 10 (a) is the synoptic diagram of a preferred embodiment of the present invention;
Figure 10 (b) is the synoptic diagram of a preferred embodiment of the present invention;
Figure 10 (c) is the synoptic diagram of a preferred embodiment of the present invention;
Figure 10 (d) is the synoptic diagram of a preferred embodiment of the present invention;
Figure 10 (e) is the synoptic diagram of a preferred embodiment of the present invention
Figure 11 is the structural representation of a preferred embodiment of the present invention;
Figure 12 (a) is the structural representation of a comparing embodiment 1 of the present invention;
Figure 12 (b) is the structural representation of a comparing embodiment 2 of the present invention;
Figure 12 (c) is the structural representation of a comparing embodiment 3 of the present invention;
Figure 12 (d) is the structural representation of a comparing embodiment 4 of the present invention;
The figure number explanation:
1 reflector plate, 2 a plurality of fluorescent tubes
4 times diffusion barriers of 3 light diffusing sheets
6 times diffusion barriers of 5 prismatic lenses
7 ultraviolet light absorbers, 8 transparent resin substrate middle layers
The 8a first diffusion particle layer matrix 8b second diffusion particle layer matrix
The 9a first diffusion particle layer 9b second diffusion particle layer
10 semiglobes, 11 prism structures
12 rectangular lens structures, 13 pyramid structures
14 pyramidal structures, 15 column structures
16 semiellipse spherical structures, 31 smooth diffusion particles
Embodiment
Further understand and understanding for the auditor is had architectural feature of the present invention and the effect reached, sincerely help with preferred embodiment figure and cooperate detailed explanation, illustrate as after:
Embodiment 1:
As shown in Figure 2, the present invention is a kind of diffuser plate embodiment 1 structural representation with multilayer diffusion particle layer.Light diffusion particle 31 is entrained in the first diffusion particle layer 9a and the second diffusion particle layer 9b, and transparent resin substrate layer 8 is sandwiched in it.The thickness of transparent resin substrate middle layer 8 and the first diffusion particle layer 9a and the second diffusion particle layer 9b is 1mm.Diffusion particle and ultraviolet absorber doping weight account for and ought a layer diffusion particle layer percent by weight be respectively 0.04% and 0.004% in each layer diffusion particle layer.The diffuser plate upper surface has a plurality of semiglobe 10 rectangular arrangements, radius of a ball 0.1mm, centre of sphere spacing 0.4mm.
Matrix 8b in middle layer 8, the first diffusion particle layer 9a matrix 8a and the second diffusion layer 9b of the transparent resin substrate of multilayer diffusion particle layer diffuser plate is selected from polymethylmethacrylate, the material of diffusion particle is to be selected from polycarbonate, and ultraviolet absorber 7 is selected UV-326 for use.
Embodiment 2:
Embodiment 2 is that with embodiment 1 key distinction embodiment 2 diffuser plate lower surfaces have plural semiglobe 10 rectangular arrangements, radius of a ball 0.1mm, centre of sphere spacing 0.4mm.
Embodiment 3:
As shown in Figure 3, be the structural representation of another kind of preferred embodiment 3 of the present invention.Embodiment 3 is that with embodiment 1 key distinction embodiment 3 diffuser plate upper and lower surfaces have a plurality of semiglobe 10 rectangular arrangements, radius of a ball 0.1mm, centre of sphere spacing 0.4mm.
Embodiment 4:
As shown in Figure 4, be the structural representation of another kind of preferred embodiment 4 of the present invention.Embodiment 4 is that with the key distinction of embodiment 3 embodiment 4 diffuser plate upper surfaces have plural semiglobe 10 rectangular arrangements, radius of a ball 0.1mm, centre of sphere spacing 0.4mm, lower surface have a plurality of prism structure 11 rectangular arrangements, each length of side of prism is 0.1mm, center distance 0.8mm.
Embodiment 5:
Embodiment 5 is that with the key distinction of embodiment 3 embodiment 5 diffuser plate upper surfaces have a plurality of prism structure 11 rectangular arrangements, and each length of side of prism is 0.1mm, center distance 0.4mm.Lower surface has plural semiglobe 10 rectangular arrangements, radius of a ball 0.1mm, and centre of sphere spacing 0.4mm,
Embodiment 6:
As shown in Figure 5, be the structural representation of another kind of preferred embodiment 6 of the present invention.Embodiment 6 is that with the key distinction of embodiment 3 embodiment 6 diffuser plate upper surfaces have a plurality of semiglobe 10 rectangular arranging, radius of a ball 0.1mm, center distance 0.4mm.There are a plurality of rectangular lens structure 12 rectangular arranging, rectangular lens length and width 0.1mm, high 0.024mm, center distance 0.2mm in the lower surface surface.
Embodiment 7:
Embodiment 8:
As shown in Figure 6, be the structural representation of another kind of preferred embodiment 8 of the present invention.Embodiment 8 is that with embodiment 3 key distinctions embodiment 8 diffuser plate upper surfaces have a plurality of semiglobe 10 rectangular arranging, radius of a ball 0.1mm, center distance 0.4mm.There are a plurality of pyramid structure 13 rectangular arranging on the lower surface surface, and each limit length of side of pyramid is 0.1mm, high 0.1mm, center distance 0.4mm.
Embodiment 9:
Embodiment 9 is that with embodiment 8 key distinctions there are a plurality of pyramid structure 13 rectangular arranging on embodiment 9 diffuser plate upper surface surfaces, and each limit length of side of pyramid is 0.1mm, high 0.1mm, center distance 0.4mm.Lower surface has a plurality of semiglobe 10 rectangular arranging, radius of a ball 0.1mm, center distance 0.4mm.
Embodiment 10:
As shown in Figure 7, be the structural representation of another kind of preferred embodiment 10 of the present invention.Embodiment 10 is that with embodiment 3 key distinctions embodiment 10 diffuser plate upper surfaces have a plurality of semiglobe 10 rectangular arrangements, crown radius 0.1mm, center distance 0.4mm.Lower surface has a plurality of conical structure 14 rectangular arrangements, conical base radius of circle 0.1mm, and the high 0.1mm of circular cone, middle ware is apart from 0.4mm.
Embodiment 11:
Embodiment 11 is that with embodiment 10 key distinctions embodiment 11 diffuser plate upper surfaces have a plurality of conical structure 14 rectangular arrangements, conical base radius of circle 0.1mm, the high 0.1mm of circular cone, center distance 0.4mm.Lower surface has a plurality of semiglobe 10 rectangular arrangements, crown radius 0.1mm, center distance 0.4mm.
Embodiment 12:
As shown in Figure 8, be the structural representation of another kind of preferred embodiment 12 of the present invention.Embodiment 12 is that with embodiment 3 key distinctions embodiment 12 diffuser plate upper surfaces have a plurality of semiglobe 10 rectangular arrangements, crown radius 0.1mm, center distance 0.4mm.Lower surface has a plurality of semi-cylindrical in configuration 15 rectangular arrangements, cylindrical radius 0.1mm, high 0.1mm, center distance 0.4mm.
Embodiment 13:
Embodiment 14:
As shown in Figure 9, be the structural representation of another kind of preferred embodiment 14 of the present invention.Embodiment 14 is that with embodiment 3 key distinctions embodiment 14 diffuser plate upper surfaces have a plurality of semiglobe 10 rectangular arrangements, crown radius 0.1mm, center distance 0.4mm.Lower surface has a plurality of semiellipse spherical structure 16 rectangular arrangements, oval major semi-axis 0.2mm, minor semi-axis 0.1mm, center distance 0.4mm.
Embodiment 15:
Embodiment 15 is that with embodiment 14 key distinctions embodiment 15 diffuser plate upper surfaces have a plurality of semiellipse spherical structure 16 rectangular arrangements, oval major semi-axis 0.2mm, minor semi-axis 0.1mm, center distance 0.4mm.Lower surface has a plurality of semiglobe 10 rectangular arrangements, crown radius 0.1mm, center distance 0.4mm.
Embodiment 16:
Shown in Figure 10 (a), be the structural representation of another kind of preferred embodiment 16 of the present invention.Embodiment 16 is that with the key distinction of embodiment 3 embodiment 16 diffuser plate upper and lower surfaces have a plurality of semiglobes 10 to be regular hexagon and arrange radius of a ball axle 0.1mm, center distance 0.6mm.
Embodiment 17:
Shown in Figure 10 (b), be the structural representation of another kind of preferred embodiment 17 of the present invention.Embodiment 17 is that with the key distinction of embodiment 3 embodiment 17 diffuser plate upper and lower surfaces have a plurality of semiglobes 10 to be polynomial expression and arrange radius of a ball 0.1mm.Center with diffuser plate is the former heart of xy coordinate axis, and then semiglobe 10 arranging on the xy direction of principal axis satisfied polynomial equation: 40x+100x
2+ 200x
3+ 300x
4, 40y+100y
2+ 200y
3+ 300y
4
Embodiment 18:
Shown in Figure 10 (c), be the structural representation of another kind of preferred embodiment 18 of the present invention.Embodiment 18 is that with the key distinction of embodiment 3 embodiment 18 diffuser plate upper and lower surfaces have a plurality of semiglobe 10 rounded arranging, radius of a ball axle 0.1mm.With the center of circle of diffuser plate central point as circle, semiglobe 10 is 1mm in the radial direction spacing, hoop centre of sphere spacing 0.5mm.
Embodiment 19:
Shown in Figure 10 (d), be the structural representation of another kind of preferred embodiment 19 of the present invention.Embodiment 19 is that with the key distinction of embodiment 3 embodiment 19 diffuser plate upper and lower surfaces have a plurality of semiglobe 10 ovalizes to arrange radius of a ball 0.1mm.With the center of circle of diffuser plate central point as circle, oval major semi-axis be (0.75+0.75r) mm, minor semi-axis be (0.375+0.375r) mm (r is the polar axis shaft when being initial point with the diffuser plate center, r=0,1,2 ...).Be 0.5mm along each ellipse direction triangular pitch.
Embodiment 20:
Shown in Figure 10 (e), be the structural representation of another kind of preferred embodiment 20 of the present invention.Embodiment 20 is that with the key distinction of embodiment 3 embodiment 20 diffuser plate upper and lower surfaces have a plurality of semiglobes 10 to be radial and arrange radius of a ball 0.1mm.With the center of circle of diffuser plate central point as circle, semiglobe 10 is 1mm in the radial direction spacing, and hoop centre of sphere spacing is that (r is the polar axis shaft when being initial point with the diffuser plate center to (0.5+0.5r) mm, r=0,1,2,), the radial direction triangular pitch is 1mm.
Embodiment 21:
As shown in figure 11, be the structural representation of another kind of preferred embodiment 10 of the present invention.As shown in figure 11, light diffusion particle 31 is entrained in the first diffusion particle layer 9a and the second diffusion particle layer 9b, and transparent resin substrate layer 8 is sandwiched in it.Transparent resin substrate is 1/2 dome-type that radius is 200mm.The thickness of transparent resin substrate middle layer 8, the first diffusion particle layer 9a and the second diffusion particle layer 9b is 1mm.Diffusion particle and ultraviolet absorber doping weight account for and ought a layer diffusion particle layer percent by weight be respectively 0.04% and 0.004% in each layer diffusion particle layer.It is that semiglobe 10 is the regular hexagon arrangement that the diffuser plate upper and lower surface has a plurality of cross sectional shapes, and the radius of a ball is 0.1mm, centre of sphere spacing 0.4mm.
Matrix 8b in middle layer 8, the first diffusion particle layer 9a matrix 8a and the second diffusion layer 9b of the transparent resin substrate of multilayer diffusion particle layer diffuser plate is selected from polymethylmethacrylate, the material of diffusion particle is to be selected from polycarbonate, and ultraviolet absorber 7 is selected UV-326 for use.
Comparing embodiment 1:
Shown in Figure 11 (a), has the comparing embodiment 1 of the diffuser plate of multilayer diffusion particle layer for the present invention is a kind of.Its diffuser plate type is the diffuser plate of pure polymethylmethacrylate, and diffuser plate thickness is 3mm;
Comparing embodiment 2:
Shown in Figure 11 (b), has the comparing embodiment 2 of the diffuser plate of multilayer diffusion particle layer for the present invention is a kind of.Its diffuser plate type is to add diffusion particle 31 and ultraviolet absorber 7, diffuser plate thickness 3mm on the polymethyl methacrylate base plate.Wherein diffusion particle 31 materials are polycarbonate, and ultraviolet absorber 7 is selected for use UV-326 diffusion particle and ultraviolet absorber doping weight to account for the diffuser plate percent by weight and is respectively 0.04% and 0.004%;
Comparing embodiment 3:
Shown in Figure 11 (c), has the comparing embodiment 3 of the diffuser plate of multilayer diffusion particle layer for the present invention is a kind of.Its diffuser plate type be pure polymethyl methacrylate base plate upper and lower surface a plurality of cross sectional shapes are arranged is semiglobe 10 rectangular arranging, radius of circle 0.1mm, center distance 0.8mm, diffuser plate thickness are 3mm;
Comparing embodiment 4:
Shown in Figure 11 (d), has the comparing embodiment 3 of the diffuser plate of multilayer diffusion particle layer for the present invention is a kind of.Its diffuser plate type is to add diffusion particle 31 and ultraviolet absorber 7 on the polymethyl methacrylate base plate, wherein diffusion particle 31 materials are polycarbonate, and ultraviolet absorber 7 is selected for use UV-326 diffusion particle and ultraviolet absorber doping weight to account for the diffuser plate percent by weight and is respectively 0.04% and 0.004%.And it is semiglobe 10 rectangular arranging that upper and lower surface has a plurality of cross sectional shapes, radius of circle 0.1mm, and center distance 0.8mm, diffuser plate thickness are 3mm.
The preparation of the diffuser plate of multilayer diffusion particle layer
The embodiment of the production method of multilayer diffusion particle layer diffuser plate employing plastic extruding forming machine is a main production equipments among above-mentioned all embodiment, carries out according to following steps successively:
Get the raw materials ready: according to transparent resin substrate layer 8, the material that diffusion particle layer 9a and 9b are used, form by its weight percent respectively weigh, mix, dehumidifying, again diffusion particle layer 9a, diffusion particle layer 9b and transparent resin substrate middle layer 8 are added respectively in three extruders.
Heating plasticizing: transparent resin substrate layer 8 used material extrusion shaping machine and heating plasticizings are become viscous state, and intermingling material extrusion shaping machine and heating plasticizing that diffusion particle layer 9a and 9b is used become viscous state.
Co-extrusion: will become the transparent resin substrate layer 8 of viscous state and diffusion particle layer 9a and the used material of 9b to import simultaneously through heating plasticizing, at bull extruder coextru-lamination all-in-one-piece goods.
Microtexture is handled: will have the microstructure sheet material and make cylindricly, it is installed in the micro-nano imprint machine, and the multilayer diffusion particle laminar surface of Ya Chuing rolls out microtexture again.
Aftertreatment: coextru-lamination all-in-one-piece goods behind roll-in typing, attached diaphragm, are cut into goods again.
The evaluation of the diffuser plate of multilayer diffusion particle layer
Utilizing the said equipment to produce the assessment comparative sample, is respectively the polymethylmethacrylate diffuser plate (comparing embodiment 4) that polymethylmethacrylate diffuser plate (comparing embodiment 3), upper and lower surface that pure polymethylmethacrylate diffuser plate (comparing embodiment 1), band polycarbonate diffusion particle polymethylmethacrylate diffuser plate (comparing embodiment 2), upper and lower surface are carved with microstructure are carved with microstructure and band polycarbonate diffusion particle.
Experiment test equipment
Based on 9 methods, adopt ST-80C type numeral illuminometer, adjust the position of illuminometer probe by mobile platform in X, Y direction, to the realization point-to-point measurement of embodiment 1 to embodiment 21, comparing embodiment 1, comparing embodiment 2, comparing embodiment 3 and comparing embodiment 4, measure the outgoing light homogeneity of exiting surface measuring point.
Utilize the WGT-S transmittance/mist degree analyzer of Shanghai secret scientific instrument company limited that embodiment 1 to embodiment 10, comparing embodiment 1, comparing embodiment 2, comparing embodiment 3 and comparing embodiment 4 are operated, measure the light extraction efficiency transmittance.The result is displayed in Table 1.
Table 1
The diffuser plate of the multilayer diffusion particle layer of invention design, the multiple stratification of diffusion particle layer makes diffuser plate of the present invention than traditional diffuser plate better light extraction efficiency be arranged.In addition, by the diffuser plate effect of two surface micro-structures up and down, changed the direction of propagation of light, and adjust the exit direction of light to a certain extent, finally realize the requirement of diffuser plate light extraction efficiency and outgoing light homogeneity, in liquid crystal display, used, can realize good effect backlight; In general illumination system, can prevent dazzle, reach the purpose of uniform irradiation.
The above, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, all so-called according to the described shape of interest field of the present invention, structure, feature and spirit all be to change and modify, all should be included in the interest field of the present invention.
Claims (8)
1. diffuser plate with multilayer diffusion particle layer is characterized in that comprising:
One deck diffusion particle layer, the middle layer that layer of transparent resin substrate is made, one deck diffusion particle layer, i.e. sandwich structure; The matrix of two-layer diffusion particle layer is to make with the macromolecule light transmissive material, all is studded with diffusion particle and ultraviolet absorber in it; At least one outside surface of diffuser plate has microstructure; The middle layer of transparent resin substrate is made into various curve forms.
2. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: described macromolecule light transmissive material is selected from one of them of polycarbonate, polymethylmethacrylate, polystyrene and methyl methacrylate blend and polystyrene.
3. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the diffusion particle in the described diffusion particle layer select for use in polycarbonate, polymethylmethacrylate, polystyrene and methyl methacrylate blend, polystyrene, monox, silicon, melamine, lime carbonate, Teflon, titania and the silicon dioxide one or both or two or more; Diffusion particle accounts for the percent by weight 0.001%-5% when layer diffusion particle layer, and the diffusion particle diameter is between 10nm-100nm, and the difference of diffusion particle refractive index and diffusion particle layer matrix refractive index is greater than 0.001.
4. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the percent by weight that ultraviolet absorber accounts for when layer diffusion particle layer is 0.001%-0.3%.
5. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the transparent resin substrate material is selected from one of them of polycarbonate, polymethylmethacrylate, polystyrene and methyl methacrylate blend and polystyrene.
6. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the transparent resin substrate middle layer is plane, bulb curved surface, sphere, NURB curved surface, one of them of the face of cylinder, ellipsoid.
7. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the diffuser plate microstructure is one of them of semiglobe, prism structure, pyramid structure, rectangular lens, semiellipse spherical structure, conical structure, parabolic surface structure, SPLINE curved-surface structure, NURB curved-surface structure.
8. the diffuser plate with multilayer diffusion particle layer according to claim 1 is characterized in that: the microstructure arrangement mode on diffuser plate surface is that rounded projections arranged, regular hexagon arrangement, rectangular arranged, radial arrangement, circular arrangement, polynomial expression are arranged, oval shaped arrangements one of them.
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| CN114764201A (en) * | 2021-01-15 | 2022-07-19 | 纳晶科技股份有限公司 | Light conversion device and backlight module comprising same |
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