CN107356995A - A kind of light diffusing sheet and its production and use - Google Patents
A kind of light diffusing sheet and its production and use Download PDFInfo
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- CN107356995A CN107356995A CN201710618304.8A CN201710618304A CN107356995A CN 107356995 A CN107356995 A CN 107356995A CN 201710618304 A CN201710618304 A CN 201710618304A CN 107356995 A CN107356995 A CN 107356995A
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- smooth diffusion
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
Abstract
The present invention provides a kind of light diffusing sheet, and the light diffusing sheet includes light diffusion substrate and light diffusion coating；The one side of the smooth diffusion substrate or two surfaces are coated with the smooth diffusion coating；The smooth diffusion coating includes binder resin and the light diffusion particle being embedded inside the binder resin.The mist degree and briliancy of the product finally obtained by above-mentioned technical proposal of the present invention while improve, reach the haze, the optical effect of high briliancy that light diffusing sheet superposition optical diffusion film can be only achieved in the prior art, while reducing module thickness, cost is remarkably reduced.
Description
Technical field
The present invention relates to light diffusing sheet field, more particularly to the new light diffusing sheet of a kind of haze, high briliancy.
Background technology
Display device is widely used in the popular consumer goods such as notebook computer, mobile phone, television set.High-quality display device needs
Picture is clearly displayed, also to accomplish that image is undistorted, it is bright in luster.Key component of the backlight as display device, to upper
Performance is stated to play a crucial role.
Backlight is made up of light source, light guide plate, reflectance coating, diffuser plate, diffusion barrier, bright enhancement film in display device, therein
Light diffusing sheet (as shown in Figure 1) is that light diffusion particle 3 is added in the thick transparent plastic substrate 1 of 0.5-1.5mm thickness and divided
Cloth is uniform, and because light diffusion particle 3 is different from the index of refraction of thick transparent plastic 1, light passes through the transparent plastic of different indexs of refraction
Deflected during with the interface of light diffusion particle, produce scattering, refraction, reflection etc. and simultaneously ultimately form mist degree, it is uneven to play covering
The purpose of even light source.But the visual effect of only this layer of light diffusing sheet is inadequate, screen is not bright enough, color is not bright-coloured enough.
So current backlight module light source design, it is required for being superimposed optical diffusion film again on the basis of existing light diffusing sheet and (or makees
Light diffusing sheet) to increase mist degree and briliancy (brightness).
Optical diffusion film can further lift mist degree, the lifting of what is more important and can on the basis of existing light diffusing sheet
Briliancy is brightness, makes screen more bright, beautiful in colour, thus significantly affects the final visual effect of display device.Thus
Optical diffusion film turns into the indispensable part that current backlight module is formed.
As shown in Fig. 2 optical diffusion film is typically the one side or dual coating in the thin transparency carrier 2 of 25-250 micron thickness
Binding resin layer 4 after solidification, contain light diffusion particle 3 in binding resin layer 4 after solidification.
Mist degree and briliancy can be improved really plus this layer of optical diffusion film on the basis of existing light diffusing sheet, make screen more
Add that bright-coloured, bright, visual effect is more preferable, but optical diffusion film is expensive, lifting cost significantly, add after this layer of optical diffusion film again
Make the thickness of whole module increase, the trend with pursuing ultra-thin at present is runed counter to.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide one kind to have haze and high briliancy
New light diffusing sheet, for solving the problems of the prior art.
In order to achieve the above objects and other related objects, the present invention obtains by the following technical programs.
The present invention provides a kind of light diffusing sheet, including light diffusion substrate and light diffusion coating；The one of the smooth diffusion substrate
Face or two surfaces are coated with the smooth diffusion coating；The smooth diffusion coating includes binder resin and is embedded in the bonding tree
Light diffusion particle inside fat.
Preferably, the smooth diffusion substrate includes transparency carrier and light diffusion particle.The smooth diffusion particle is added to institute
State inside transparency carrier.Preferably, the thickness of the transparency carrier is 0.5~1.5mm.
Preferably, counted on the basis of the quality of the transparency carrier, the matter for the light diffusion particle being added in transparency carrier
Amount percentage composition is no more than 5wt%.It is highly preferred that being counted on the basis of the quality of the transparency carrier, it is added in transparency carrier
The weight/mass percentage composition of light diffusion particle be no more than 4wt%.
Preferably, the refractive index of the transparency carrier is 1.35~2.50.
It is highly preferred that the material of the transparency carrier be selected from glass, polymethyl methacrylate (being abbreviated as PMMA), poly- pair
PET (being abbreviated as PET), polyethylene terephthalate -1,4 cyclohexane dimethanol ester (are abbreviated as
PETG), makrolon (being abbreviated as PC), polyamide (being abbreviated as PA), polystyrene (being abbreviated as PS), polyethylene (abbreviation
For PE), SAN (being abbreviated as SAN), polypropylene (being abbreviated as PP), in polyvinyl chloride (being abbreviated as PVC)
It is a kind of.
Preferably, the refractive index of binder resin is 1.4~1.7 in the smooth diffusion coating.
Preferably, the gross thickness of the smooth diffusion coating is no more than 0.1mm.It is highly preferred that the smooth diffusion coating
Thickness in monolayer is no more than 50 μm.It is highly preferred that the thickness in monolayer of the smooth diffusion coating is no more than 30 μm.It is it is highly preferred that described
The thickness in monolayer of light diffusion coating is no more than 20 μm.Preferably, the thickness in monolayer of the smooth diffusion coating is no more than 15 μm.
Preferably, in light diffusion coating, the thickness after the binder resin solidification is averagely straight for the smooth diffusion particle
The 1/5-4/5 in footpath.It is highly preferred that in light diffusion coating, the thickness after the binder resin solidification spreads grain for the big light
The 1/5-4/5 of sub- average diameter.To ensure that surface forms lenticular mode projection after binder resin solidification.
Preferably, the binder resin is selected from epoxy resin, acrylic resin, polyurethane, polyvinyl acetate and ureaformaldehyde
One or more in resin.
Preferably, in light diffusion coating, the weight ratio of the diffusion particle and binder resin is (1-15):10.
Preferably, in the smooth diffusion coating, the smooth diffusion particle comprises at least organic smooth diffusion particle.More preferably
Ground, in the smooth diffusion coating, organic smooth diffusion particle comprises at least organic big light diffusion that average grain diameter is 10~50 μm
Particle.Preferably, the average grain diameter of organic big smooth diffusion particle is 10~30 μm.It is highly preferred that organic big light expands
The average grain diameter of shot is 10~20 μm.
Preferably, in the smooth diffusion coating, organic smooth diffusion particle also includes maximum particle diameter and is less than 10 μm
Organic small smooth diffusion particle.Preferably, the maximum particle diameter of organic small smooth diffusion particle is no more than 5 μm.
Preferably, in the smooth diffusion coating, the weight of organic big smooth diffusion particle and organic small smooth diffusion particle
It is (0.5-50) to measure ratio:1.
Preferably, organic smooth diffusion particle is selected from polymethyl methacrylate, polybutyl methacrylate, polyphenyl second
One or more in alkene, organopolysiloxane.
Preferably, in light diffusion coating, the smooth diffusion particle also includes inorganic smooth diffusion particle.It is highly preferred that institute
The maximum particle diameter for stating inorganic smooth diffusion particle is no more than 10 μm.It is highly preferred that the maximum particle diameter of the inorganic smooth diffusion particle
No more than 5 μm.
Preferably, the inorganic smooth diffusion particle be selected from titanium dioxide, calcium carbonate, barium sulfate, silica, aluminum oxide and
One or more in zinc oxide.
Preferably, in light diffusion coating, the weight ratio of organic smooth diffusion particle and inorganic smooth diffusion particle is (2-
100):1。
Preferably, in light diffusion substrate, the smooth diffusion particle is inorganic smooth diffusion particle and organic smooth diffusion particle
One or both of.Preferably, in light diffusion substrate, the average grain diameter of the smooth diffusion particle is no more than 10 μm.More
Preferably, in light diffusion substrate, the average grain diameter of the smooth diffusion particle is no more than 5 μm.
Preferably, in the smooth diffusion coating, the smooth diffusion particle includes organic big smooth diffusion particle, organic small light
Diffusion particle and inorganic smooth diffusion particle；And organic big smooth diffusion particle, organic small smooth diffusion particle and the diffusion of inorganic light
The mass ratio of particle is (100~2)：(90~2)：(20~1).
It is highly preferred that the smooth diffusion coating includes the following raw material component and parts by weight：
The parts by weight of binder resin 90~100
Organic big smooth parts by weight of diffusion particle 2~98
Organic small smooth parts by weight of diffusion particle 2~80
The inorganic parts by weight of smooth diffusion particle 1~10.
A kind of preparation method of light diffusing sheet as described above, comprises the following steps：
1) preparation of light diffusion substrate；
2) preparation of light diffusion coating coating；
3) the smooth diffusion coating coating is coated on to the one or both sides of the smooth diffusion substrate；
4) solidify.
Preferably, the preparation of light diffusion substrate includes for light diffusion particle being added to the transparent base of molten condition in step 1)
Light diffusing sheet is made in plate material.
Preferably, step 2) includes adding light diffusion particle in binder resin and diluent to be well mixed light diffusion is made
Coating
Coating.
Preferably, the smooth diffusion coating coating is being coated on the one or both sides of the smooth diffusion substrate by step 3)
Before, surface corona or corona treatment are carried out to the smooth diffusion substrate before coating.Carry out surface corona or plasma
Handle as in order to strengthen adhesive strength.
Preferably, the diluent is the organic solvent or water that can dissolve the binder resin.Light diffusion coating coating
Solid content can be adjusted according to specific needs.Preferably, the solid content of light diffusion coating coating is 35~75wt%.
A kind of display device, using light diffusing sheet as described above.
Preferably, the display device includes light source assembly and panel assembly, and the panel assembly includes described above
Light diffusing sheet.
Preferably, the light source assembly includes light source, light guide plate, reflector plate.Preferably, the reflector plate is silver plated metals
One kind in reflector plate, silver-colored reflector plate or foaming PET reflector plate.The light source is LED, cold-cathode fluorescence lamp, thermic cathode fluorimetric
One kind in lamp, light emitting diode or external electrode fluorescent lamp.The light source is arranged on the side of light guide plate or is arranged on and leads
Between tabula rasa and reflector plate.
Compared with prior art, the present invention has the advantage that：
Light diffusing sheet provided by the invention, by internally added with light diffusion particle light diffusion substrate one side or
Two-sided setting light diffusion coating, and due to the organic smooth diffusion particle in the part in light diffusion coating diameter higher than solidification after
The thickness of bonding resin layer, surface lenticular mode projection is formed, plays condenser effect so as to improve briliancy, the light compared with small particle expands
The sub and inorganic diffusion particle of shot is filled with the space between organic big smooth diffusion particle so that and sized particles are formed and are spaced,
So as to improve uniformity and mist degree optically；Again due to being also added with light diffusion particle in transparency carrier, further enhance
The mist degree of light diffusing sheet；The mist degree and briliancy of the product finally obtained by above-mentioned technical proposal of the present invention while carry
Height, reach light diffusing sheet superposition optical diffusion film can be only achieved in the prior art haze, the optical effect of high briliancy, reduce
While module thickness, cost is remarkably reduced.
Brief description of the drawings
Fig. 1 is shown as the structural representation of light diffusing sheet of the prior art.
Fig. 2 is shown as the structural representation of optical diffusion film of the prior art (light diffusing sheet).
Fig. 3 is shown as the structural representation of the light diffusing sheet of superposition optical diffusion film of the prior art.
Fig. 4 is shown as the structural representation of backlight of the prior art.
Reference in Fig. 1~3 is as follows：
Fig. 5 is shown as the structural representation of the light diffusing sheet in the application.
Fig. 5 reference is as follows
| 100 | Transparent plastic substrate |
| 101 | Bonding resin layer after solidification |
| 102 | Light diffusion particle in light diffusion coating |
| 103 | The light diffusion particle added inside transparent plastic substrate |
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Before the specific embodiment of the invention is further described, it should be appreciated that protection scope of the present invention is not limited to down
State specific specific embodiment；It is also understood that the term used in the embodiment of the present invention is specific specific in order to describe
Embodiment, the protection domain being not intended to be limiting of the invention.The test method of unreceipted actual conditions in the following example,
Generally according to normal condition, or the condition proposed by according to each manufacturer.
When embodiment provides number range, it should be appreciated that except non-invention is otherwise noted, two ends of each number range
Any one numerical value can be selected between point and two end points.Unless otherwise defined, in the present invention all technologies for using and
Scientific terminology is identical with the meaning that those skilled in the art of the present technique are generally understood that.Except used in embodiment specific method, equipment,
Outside material, according to grasp of the those skilled in the art to prior art and the record of the present invention, it can also use and this
Any method, equipment and the material of the similar or equivalent prior art of method, equipment described in inventive embodiments, material come real
The existing present invention.
As shown in figure 5, a kind of light diffusing sheet provided by the invention, including it is internal added with the light diffusion of light diffusion particle
Substrate and light diffusion coating；The one side of the smooth diffusion substrate or two surfaces are coated with the smooth diffusion coating；The light expands
Dissipating coating includes bonding resin layer 101 and is embedded the light diffusion particle 102 in the inside of binder resin 101.
Preferably, the smooth diffusion substrate includes transparency carrier 100 and light diffusion particle 103.Preferably, with described transparent
Counted on the basis of the quality of substrate, the weight/mass percentage composition for the light diffusion particle being added in transparency carrier is no more than 5wt%.
In light diffusion coating, the thickness after the binder resin solidification is organic big smooth diffusion particle average diameter
1/5-4/5.To ensure that coating surface forms lenticular mode projection after binder resin solidification.
The material of the transparency carrier is selected from glass, polymethyl methacrylate (being abbreviated as PMMA), poly terephthalic acid
Glycol ester (being abbreviated as PET), polyethylene terephthalate -1,4 cyclohexane dimethanol ester (being abbreviated as PETG), poly- carbon
Acid esters (being abbreviated as PC), polyamide (being abbreviated as PA), polystyrene (being abbreviated as PS), polyethylene (being abbreviated as PE), benzene second
One kind in alkene-acrylonitrile copolymer (being abbreviated as SAN), polypropylene (being abbreviated as PP), polyvinyl chloride (being abbreviated as PVC).
In the smooth diffusion substrate, the maximum particle diameter of the smooth diffusion particle 103 is no more than 10 μm.It is highly preferred that
In the smooth diffusion substrate, the maximum particle diameter of the smooth diffusion particle 103 is no more than 5 μm.
In the smooth diffusion coating, the weight ratio of the smooth diffusion particle and the binder resin after solidification is (1-15):
10。
In the smooth diffusion coating, the smooth diffusion particle 102 comprises at least organic smooth diffusion particle.It is highly preferred that
Organic smooth diffusion particle comprises at least organic big smooth diffusion particle that average grain diameter is 10~50 μm.Preferably, it is described organic big
The average grain diameter of light diffusion particle is 10~30 μm.It is highly preferred that the average grain diameter of organic big smooth diffusion particle be 10~
20μm.Preferably, in the smooth diffusion coating, it is organic less than 10 μm that organic smooth diffusion particle also includes maximum particle diameter
Small smooth diffusion particle.Preferably, the maximum particle diameter of organic small smooth diffusion particle is no more than 5 μm.
Preferably, in the smooth diffusion coating, the smooth diffusion particle also includes inorganic smooth diffusion particle.Preferably,
The maximum particle diameter of the inorganic smooth diffusion particle is no more than 10 μm.It is highly preferred that the maximum particle diameter of the inorganic smooth diffusion particle
No more than 5 μm.
Preferably, organic smooth diffusion particle is selected from polymethyl methacrylate, polybutyl methacrylate, polyphenyl second
One or more in alkene, organopolysiloxane.
Preferably, the inorganic smooth diffusion particle be selected from titanium dioxide, calcium carbonate, barium sulfate, silica, aluminum oxide and
One or more in zinc oxide.
Preferably, in the smooth diffusion coating, the smooth diffusion particle includes organic big smooth diffusion particle, organic small light
Diffusion particle and inorganic smooth diffusion particle；And organic big smooth diffusion particle, organic small smooth diffusion particle and the diffusion of inorganic light
The mass ratio of particle is (100~2)：(90~2)：(20~1).
Preferably, in light diffusion substrate, the smooth diffusion particle is inorganic smooth diffusion particle and organic smooth diffusion particle
One or both of.
A kind of preparation method of light diffusing sheet as described above, comprises the following steps：
1) preparation of light diffusion substrate；
2) preparation of light diffusion coating coating；
3) the smooth diffusion coating coating is coated on to the one or both sides of the smooth diffusion substrate；
4) solidify.
Preferably, the preparation of light diffusion substrate includes for light diffusion particle being added to the transparent base of molten condition in step 1)
Light diffusing sheet is made in plate material.
Preferably, step 2) includes adding light diffusion particle in binder resin and diluent to be well mixed light diffusion is made
Coating.
Preferably, the smooth diffusion coating coating is being coated on the one or both sides of the smooth diffusion substrate by step 3)
Before, surface corona or corona treatment are carried out to the smooth diffusion substrate before coating.Carry out surface corona or plasma
Handle as in order to strengthen adhesive strength.
Preferably, the diluent is solvent or water.
Embodiment 1
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent PET substrate, organic smooth diffusion particle is added in the PET material of molten condition light diffusion substrate is made；Light
Light diffusion coating is set on one or two surface of diffusion substrate.Organic smooth diffusion particle of addition is inside light diffusion substrate
Average grain diameter is 2 μm of PMMA.
Binder resin in light diffusion coating is polyurethane, and the light diffusion particle in coating includes organic big light diffusion grain
Sub, organic small smooth diffusion particle and inorganic smooth diffusion particle.Organic smooth diffusion particle is PMMA, and inorganic smooth diffusion particle is dioxy
Change titanium.The particle diameter of wherein organic big smooth diffusion particle is 10~13 μm, and the maximum particle diameter of organic small smooth diffusion particle is no more than 2 μ
M, the average grain diameter of organic small smooth diffusion particle is 1 μm；The particle size range of inorganic smooth diffusion particle is 0.1~0.3 μm.
In light diffusion substrate, the weight ratio of transparent PET substrate and light diffusion particle is 100：1.
The smooth diffusion coating includes the raw material components of following parts by weight：
Embodiment 2
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent PMMA substrates, organic smooth diffusion particle polysiloxanes is added in the PMMA materials of melting light diffusion base is made
Plate；Light diffusion coating is set on one or two surface of light diffusion substrate.The polysiloxanes light added in light diffusion substrate expands
The average grain diameter of shot is 2 μm.
Binder resin in light diffusion coating is polyurethane, and light diffusion particle includes organic big light diffusion in light diffusion coating
Particle, organic small smooth diffusion particle and inorganic smooth diffusion particle.Organic big smooth diffusion particle is PMMA；Organic small smooth diffusion particle
For polysiloxanes, inorganic smooth diffusion particle is titanium dioxide.The average grain diameter of organic big smooth diffusion particle is 15 μm, organic small light
The average grain diameter of diffusion particle is 2 μm；The particle size range of inorganic smooth diffusion particle is 0.2~0.3 μm.
In light diffusion substrate, the weight ratio of light diffusion particle of the transparent PMMA substrates with adding is 100：2.5.
The smooth diffusion coating includes the raw material components of following parts by weight：
Embodiment 3
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent PC substrates, organic smooth diffusion particle is added in the PC materials of melting and forms light diffusion substrate, the addition
Organic smooth diffusion particle inside transparency carrier is the polysiloxanes that average grain diameter is 1.5 μm；One of light diffusion substrate or two
Light diffusion coating is set on individual surface.
Binder resin in light diffusion coating is acrylic resin, and light diffusion particle includes organic big light in light diffusion coating
Diffusion particle, organic small smooth diffusion particle and inorganic smooth diffusion particle.Organic big smooth diffusion particle is PS.Organic small light diffusion grain
Son is polysiloxanes.Inorganic smooth diffusion particle is silica.The average grain diameter of organic big smooth diffusion particle is 20 μm, You Ji little
The average grain diameter of light diffusion particle is 2 μm；The particle size range of inorganic smooth diffusion particle is 1.0~3.0 μm.
In light diffusion substrate, the weight ratio of transparent PC substrates and light diffusion particle is 100：1.
The smooth diffusion coating includes the raw material components of following parts by weight：
Embodiment 4
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent PS substrates, organic smooth diffusion particle is added in the PS materials of melting light diffusion substrate, the addition is made
Organic smooth diffusion particle inside transparency carrier is the polysiloxanes that average grain diameter is 1.5 μm；One of light diffusion substrate or two
Light diffusion coating is set on individual surface.
Binder resin in light diffusion coating is epoxy resin,
Light diffusion particle in light diffusion coating is organic big smooth diffusion particle PMMA, organic small smooth poly- silica of diffusion particle
Alkane and inorganic smooth diffusion particle calcium carbonate.The average grain diameter of organic big smooth diffusion particle is 25 μm, organic small smooth diffusion particle
Average grain diameter is 3 μm；The average grain diameter of inorganic smooth diffusion particle is 10 μm.
In light diffusion substrate, the weight ratio of transparent PS substrates and light diffusion particle is 100：3.
The smooth diffusion coating includes the raw material components of following parts by weight：
Embodiment 5
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent SAN substrates, organic smooth diffusion particle is added in the SAN material of melting light diffusion substrate is made；Light spreads
Light diffusion coating is set on one or two surface of substrate.Organic smooth diffusion particle inside the addition transparency carrier is flat
The PMMA light diffusion particles that equal particle diameter is 2 μm.
Binder resin in light diffusion coating is Lauxite, and the light diffusion particle in light diffusion coating includes organic big light
Diffusion particle polysiloxanes, organic small smooth diffusion particle polysiloxanes and inorganic smooth diffusion particle barium sulfate.Organic big light diffusion
The average grain diameter of particle is 20 μm, and the average grain diameter of organic small smooth diffusion particle is 3 μm；The particle size range of inorganic smooth diffusion particle
For 2 μm.
The weight ratio of transparent SAN substrates and PMMA light diffusion particles is 100：2.5.
The smooth diffusion coating includes the raw material components of following parts by weight：
Embodiment 6
Disclose a kind of smooth diffusion substrate in the present embodiment, the transparency carrier 100 in the smooth diffusion substrate is thickness
1.50mm transparent PP substrate, organic smooth diffusion particle polysiloxanes is added in the PP materials of melting and forms light diffusion substrate；
Light diffusion coating is set on one or two surface of light diffusion substrate.In the smooth diffusion substrate, add in transparency carrier
The average grain diameter of the light diffusion particle organopolysiloxane in portion is 3 μm.
Binder resin in light diffusion coating is epoxy resin, and the light diffusion particle in light diffusion coating includes organic big light
Diffusion particle polysiloxanes, organic small smooth diffusion particle polysiloxanes and inorganic smooth diffusion particle barium sulfate.Organic big light diffusion
The average grain diameter of particle is 20 μm, and the average grain diameter of organic small smooth diffusion particle is 2 μm；The particle size range of inorganic smooth diffusion particle
For 0.1 μm.
The weight ratio of transparent PP substrate and interior addition polymerization siloxanes light diffusion particle is 100：4.
The smooth diffusion coating includes the raw material components of following parts by weight：
Table 1 is the performance comparision that light diffusing sheet is superimposed optical diffusion film with wide diffuser plate in the prior art in embodiment 1~6.
3*7 represents that optics framework is to be distributed in the way of 3 rows 7 arrange in the LED light bar in upper table.
Light diffusing sheet is 1mm in the prior art；The gross thickness of light diffusing sheet and diffusion barrier is 1.725mm in the prior art；
The new light thickness that falls apart is 1.55mm in the application.
As can be seen from the above table：The light transmittance of light diffusing sheet, mist degree in the embodiment 1~6 prepared according to the application method
Effect in the prior art can be reached with briliancy, but its thickness is low compared with prior art, meets the city of display screen more and more thinner
Field trend；And optical diffusion film is superimposed light diffusing sheet in the prior art for the light diffusing sheet contrast formed using method in the application
Combination, by taking 32 cun of 1T diffuser plates as an example, common light diffusing sheet price 5 yuan, 3 yuan of optical diffusion film price being superimposed of needs, add up to 8
Member, and in the application the new light diffusing sheet of technical scheme 6.5 yuan of price, reduce 18.75% cost.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of light diffusing sheet, it is characterised in that the light diffusing sheet includes light diffusion substrate and light diffusion coating；The light expands
The one side or two surfaces for dissipating substrate are coated with the smooth diffusion coating；The smooth diffusion coating includes binder resin and is embedded
Light diffusion particle inside the binder resin.
2. light diffusing sheet as claimed in claim 1, it is characterised in that including the one or more in following feature：
The smooth diffusion substrate includes transparency carrier and light diffusion particle；
Counted on the basis of the quality of the transparency carrier, the weight/mass percentage composition for the light diffusion particle being added in transparency carrier is not
More than 5wt%；
The material of the transparency carrier is selected from glass, polymethyl methacrylate, polyethylene terephthalate, poly- to benzene two
Formic acid glycol ester -1,4 cyclohexane dimethanol ester, makrolon, polyamide, polystyrene, polyethylene, styrene-the third
One kind in alkene lonitrile copolymer, polypropylene and polyvinyl chloride.
3. light diffusing sheet as claimed in claim 1, it is characterised in that including the one or more in following feature：
In light diffusion coating, the thickness after the binder resin solidification is the 1/5-4/5 of light diffusion particle average diameter；
The one kind of the binder resin in epoxy resin, acrylic resin, polyurethane, polyvinyl acetate and Lauxite
It is or a variety of.
4. light diffusing sheet as claimed in claim 1, it is characterised in that including the one or more in following feature：
In the smooth diffusion coating, the smooth diffusion particle comprises at least organic smooth diffusion particle；
Organic smooth diffusion particle comprises at least organic big smooth diffusion particle that average grain diameter is 10~50 μm；
Organic smooth diffusion particle includes organic small smooth diffusion particle that average grain diameter is less than 10 μm；
Organic smooth diffusion particle is selected from polymethyl methacrylate, polybutyl methacrylate, polystyrene, poly- organic poly-
One or more in siloxanes.
5. light diffusing sheet as claimed in claim 4, it is characterised in that in the smooth diffusion coating, organic big light expands
The weight ratio of the sub and organic small smooth diffusion particle of shot is (0.5-50):1.
6. light diffusing sheet as claimed in claim 1, it is characterised in that including the one or more in following feature：
In light diffusion coating, the smooth diffusion particle includes inorganic smooth diffusion particle；
The average grain diameter of inorganic smooth diffusion particle is no more than 10 μm；
The inorganic smooth diffusion particle is in titanium dioxide, calcium carbonate, barium sulfate, silica, aluminum oxide and zinc oxide
It is one or more.
7. light diffusing sheet as claimed in claim 6, it is characterised in that organic smooth diffusion particle and inorganic smooth diffusion particle
Weight ratio be (2-100):1.
8. a kind of preparation method of light diffusing sheet as described in any one of claim 1~7, comprises the following steps：
1) preparation of light diffusion substrate；
2) preparation of light diffusion coating coating；
3) the smooth diffusion coating coating is coated on to the one or both sides of the smooth diffusion substrate；
4) solidify.
A kind of 9. display device, using the light diffusing sheet as described in any one of claim 1~7.
10. display device as claimed in claim 9, it is characterised in that the display device includes light source assembly and panel assembly,
The panel assembly includes light diffusing sheet described above.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161143A (en) * | 2018-09-04 | 2019-01-08 | 东莞市银禧光电材料科技股份有限公司 | AS material, preparation method and the lampshade of a kind of high photosynthetic efficiency, high tenacity |
| CN110862757A (en) * | 2019-12-06 | 2020-03-06 | 深圳职业技术学院 | Light diffusion coating, light diffusion sheet, preparation method of light diffusion sheet and backlight module |
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| CN109161143A (en) * | 2018-09-04 | 2019-01-08 | 东莞市银禧光电材料科技股份有限公司 | AS material, preparation method and the lampshade of a kind of high photosynthetic efficiency, high tenacity |
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| CN110862757B (en) * | 2019-12-06 | 2021-07-06 | 深圳职业技术学院 | Light diffusion coating, light diffusion sheet, preparation method of light diffusion sheet and backlight module |
| CN114624921A (en) * | 2022-03-11 | 2022-06-14 | 纳晶科技股份有限公司 | Optical plate, display device comprising same and preparation method of quantum dot optical plate |
| CN114624921B (en) * | 2022-03-11 | 2023-08-01 | 纳晶科技股份有限公司 | Optical plate, display device comprising same and preparation method of quantum dot optical plate |
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Application publication date: 20171117 |