CN207586456U - Optical diffusion film and back light unit - Google Patents
Optical diffusion film and back light unit Download PDFInfo
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- CN207586456U CN207586456U CN201721580006.6U CN201721580006U CN207586456U CN 207586456 U CN207586456 U CN 207586456U CN 201721580006 U CN201721580006 U CN 201721580006U CN 207586456 U CN207586456 U CN 207586456U
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Abstract
The utility model is related to a kind of optical diffusion film and back light units, the optical diffusion film includes the diffusion layer of base material and the outer layer coated in the base material, several grain sizes different the first diffusion particle and the second diffusion particle are dispersed in the diffusion layer, first diffusion particle is staggered arranged in interval setting with second diffusion particle；One side of the diffusion layer far from the base material is equipped with several third diffusion particles, and the grain size of the third diffusion particle is respectively less than the grain size of first diffusion particle, second diffusion particle.Above-mentioned optical diffusion film is by being equipped with base material and diffusion layer, diffusion layer is equipped with different the first diffusion particle, the second diffusion particle and the third diffusion particles of grain size, the interaction of three kinds of diffusion particles, so that the outer surface of diffusion layer forms the curved surface for having certain focusing light effect to light, can uniform diffusing light, and brightness is high.
Description
Technical field
The utility model is related to optics technical field of membrane, more particularly to a kind of optical diffusion film and back light unit.
Background technology
Optical diffusion film is a kind of film for being used to spread point light source, the light of linear light source or the angle for adjusting emergent light,
To obtain uniform and high front face brightness illumination.This optical diffusion film is widely used in equipment in mobile phone, digital camera etc.
Liquid crystal display and liquid crystal TV set etc. in.
In the conventional technology, optical diffusion membrane mainly includes transparent base, diffusion coating layer, scattering particles, anti-bonding
Coating layer and anti-bonding particle.Above-mentioned optical diffusion membrane relies primarily on random scatter and different-grain diameter in diffusion coating layer
Diffusion particle is fully scattered to entering the incident ray in coating, so that the direction random distribution of emergent ray, thus will
Incident uneven uniform illumination, and the flaw of film lower back optical mode set of pieces is covered.Meanwhile some grain sizes are larger
Particle at the top of protrude from coating surface, the curved surface that there is certain focusing light effect to light is formed, so as to expand such optics
Discrete piece has certain light gathering.However the only larger particle of minority grain size protrudes from coating so that the thickness of diffusion coating
Degree and the ratio of diffusion particle maximum particle diameter are bigger than normal, and particle coating density is less than normal, so the light gathering of above-mentioned film and covering
Ability is extremely limited.
Utility model content
Based on this, it is necessary to for current traditional technology there are the problem of, provide it is a kind of have preferable light gathering and
The optical diffusion film of covering power, can uniform diffusing light.
The utility model also provides a kind of back light unit using the optical diffusion film.
In order to realize the purpose of this utility model, the utility model uses following technical scheme：
A kind of optical diffusion film, the diffusion layer of the outer layer including base material and coated in the base material, the diffusion layer is interior to be disperseed
There are the first diffusion particle and the second diffusion particle that several grain sizes is different, first diffusion particle and the described second diffusion grain
Son is staggered arranged in interval setting；One side of the diffusion layer far from the base material is equipped with several third diffusion particles, described
The grain size of third diffusion particle is respectively less than the grain size of first diffusion particle, second diffusion particle.
Above-mentioned optical diffusion film is equipped with the first different diffusion grain of grain size by being equipped with base material and diffusion layer, diffusion layer
Son, the second diffusion particle and third diffusion particle, the interaction of three kinds of diffusion particles so that the outer surface of diffusion layer is formed pair
Light has the curved surface of certain focusing light effect, can uniform diffusing light, and brightness is high.
The grain size of first diffusion particle is more than the grain size of second diffusion particle in one of the embodiments,.
Twice of grain size for the second diffusion particle of the grain size of first diffusion particle in one of the embodiments,.
Spacing in one of the embodiments, between the adjacent third diffusion particle is identical.
The centre-to-centre spacing between the adjacent third diffusion particle is more than the described second diffusion in one of the embodiments,
The diameter of particle.
First diffusion particle, the second diffusion particle, third diffusion particle are hollow in one of the embodiments,
Silica.
The thickness of the diffusion layer is 8 μm~10 μm in one of the embodiments,.
The base material is pet layer in one of the embodiments, and the thickness of the pet layer is 150 μm~200 μm.
The optical diffusion film further includes the adherent layer for the internal layer for being bonded to the base material, institute in one of the embodiments,
The thickness for stating adherent layer is 5 μm~8 μm.
A kind of back light unit, including any of the above-described optical diffusion film.
Description of the drawings
Fig. 1 is the schematic diagram of the optical diffusion film of a preferred embodiment of the utility model.
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is the public affairs made to the utility model
Open the understanding more thorough and comprehensive of content.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to the technology of the utility model
The normally understood meaning of technical staff in domain is identical.It is only in the term used in the description of the utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, the optical diffusion film 100 of the preferred embodiment for the utility model, for being mounted on back light unit
On, which includes liquid crystal displays and the liquid crystal TV sets such as mobile phone, digital camera.The optical diffusion film 100 includes base material
10th, the diffusion layer 20 of the outer layer coated in base material 10 and be bonded to base material 10 internal layer adherent layer 30.
Base material 10 is made of light transmissive film, can use such as glass, plastic foil material.Optionally, plastic foil includes
Cellulose acetates resinoid, acrylic resin, polycarbonate resin, the poly terephthalic acids such as TAC (tri acetyl cellulose)
Polyolefin resins such as the polyester resins such as glycol ester, polyethylene, polypropylene etc..In a wherein embodiment, the base material 10
It is using pet layer made of PET material, PET also known as high temperature resistance polyester film, it has fabulous optical property, such as transparency
Well, mist degree is low, and glossiness is high, can effectively improve the translucency and heat-resisting quantity of the optical diffusion film 100 using the pet layer.
In another embodiment, the thickness of the base material 10 is 150 μm~200 μm.
Diffusion layer 20 by way of coating be coated in base material 10 on, the light diffusion layer 20 using translucent resin prepare and
Into the translucent resin can be the ionizing radiations gel-type resins such as ultraviolet curing resin, electron beam curing type resin
Solidfied material (such as epoxy resin), thermoplastic resin (such as ethyl cellulose of (such as polybutadiene) or thermohardening type resin
Element), the solidfied material of metal alkoxide etc..Light diffusion layer 20 can also add light according to demand other than using above-mentioned resin
The auxiliary agents such as initiator, photopolymerization promoter, levelling agent, antifoaming agent, curing agent, slipping agent, antistatic agent.Divide in light diffusion layer 20
Dissipate the first diffusion particle 21 and the second diffusion particle 22 for having several grain sizes different, the first diffusion particle 21 and the second diffusion grain
Son 22 is staggered arranged in interval setting.It is intelligible, the second diffusion particle 22 between the first adjacent diffusion particle 21 and
Close to the one end of diffusion layer 20 far from base material 10, similarly can also, the second diffusion particle 22 is located at the first adjacent diffusion particle
One end of base material 10 is contacted between 21 and close to diffusion layer 20.
One side of the diffusion layer 20 far from base material 10 is equipped with several third diffusion particles 23, the grain size of third diffusion particle 23
The grain size of respectively less than the first diffusion particle 21, the second diffusion particle 22,23 and first diffusion particle 21 of third diffusion particle,
Two diffusion particles 22 are provided commonly for making the outer surface of diffusion layer to form the curved surface for having certain focusing light effect to light, can uniformly expand
Astigmatism line.In a wherein embodiment, the spacing between adjacent third diffusion particle 23 is identical, so that adjacent third diffusion
Particle 23 forms diffusion admittance in the top of the first diffusion particle 21, the second diffusion particle 22, can effectively improve the brightness of light.
Specifically, the centre-to-centre spacing between adjacent third diffusion particle 23 is more than the diameter of the second diffusion particle 22.
In a wherein embodiment, the first diffusion particle 21, the second diffusion particle 22, third diffusion particle 23 are selected
The features such as hollow silica, hollow silica microsphere have large specific surface area, and density is low, and stability is good, due to inside it
It is hollow, the easy volatile solvents such as gas or small-molecule substance can be encapsulated, can reduce and larger aerosol is formed on diffusion barrier, influence light
Line is spread.Intelligible, which can also select other particles with diffusion function, such as organosilicon, nylon.
In another embodiment, the grain size of the first diffusion particle 21 is more than the grain size of the second diffusion particle 22；Third is spread
The grain size of particle 23 is less than the grain size of the second diffusion particle 22.Specifically, the grain size of the first diffusion particle 21 is the second diffusion grain
Twice of the grain size of son 22.Such as：The grain size of first diffusion particle 21 is 10 μm；The grain size of second diffusion particle 22 is 5 μm；
The grain size of third diffusion particle 23 is 2 μm.
In another embodiment, the thickness of the diffusion layer 20 is 8 μm~12 μm, specifically, the thickness of diffusion layer 20 is 10
μm。
Adherent layer 30 is by one or two kinds of in the resin materials such as crylic acid resin, polyurethanes, propylene polyalcohols
Composition described above.In a wherein embodiment, the thickness of adherent layer 30 is 5 μm~8 μm.
The utility model also provides back light unit, including above-mentioned optical diffusion film 100, back light unit can be allow uniformly to expand
Astigmatism line, greatly enhances the working effect of back light unit, and brightness is high.
Above-mentioned optical diffusion film is equipped with the first different diffusion particle of grain size by being equipped with base material and diffusion layer, diffusion layer
21st, the second diffusion particle 22 and third diffusion particle 23, the interaction of three kinds of diffusion particles so that the outer surface shape of diffusion layer
Pairs of light has the curved surface of certain focusing light effect, can uniform diffusing light, and brightness is high.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that the common skill for this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of optical diffusion film, which is characterized in that the diffusion layer of the outer layer including base material and coated in the base material, the diffusion
Several grain sizes different the first diffusion particle and the second diffusion particle are dispersed in layer, first diffusion particle and described the
Two diffusion particles are staggered arranged in interval setting；One side of the diffusion layer far from the base material is equipped with several thirds and spreads grain
Son, the grain size of the third diffusion particle are respectively less than the grain size of first diffusion particle, second diffusion particle.
2. optical diffusion film according to claim 1, which is characterized in that the grain size of first diffusion particle is more than described the
The grain size of two diffusion particles.
3. optical diffusion film according to claim 2, which is characterized in that the grain size of first diffusion particle is the second diffusion
Twice of the grain size of particle.
4. optical diffusion film according to claim 1, which is characterized in that the spacing between the adjacent third diffusion particle
It is identical.
5. optical diffusion film according to claim 4, which is characterized in that the center between the adjacent third diffusion particle
Away from the diameter more than second diffusion particle.
6. according to the optical diffusion film described in any one of claim 1 to 5, which is characterized in that first diffusion particle, second
Diffusion particle, third diffusion particle are hollow silica.
7. optical diffusion film according to claim 1, which is characterized in that the thickness of the diffusion layer is 8 μm~10 μm.
8. optical diffusion film according to claim 1, which is characterized in that the base material be pet layer, the thickness of the pet layer
It is 150 μm~200 μm.
9. optical diffusion film according to claim 1, which is characterized in that the optical diffusion film, which further includes, is bonded to the base material
Internal layer adherent layer, the thickness of the adherent layer is 5 μm~8 μm.
10. a kind of back light unit, which is characterized in that including the optical diffusion film described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721580006.6U CN207586456U (en) | 2017-11-22 | 2017-11-22 | Optical diffusion film and back light unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721580006.6U CN207586456U (en) | 2017-11-22 | 2017-11-22 | Optical diffusion film and back light unit |
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| CN207586456U true CN207586456U (en) | 2018-07-06 |
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| CN201721580006.6U Active CN207586456U (en) | 2017-11-22 | 2017-11-22 | Optical diffusion film and back light unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116106999A (en) * | 2023-04-13 | 2023-05-12 | Tcl华星光电技术有限公司 | Light diffusion film and polarizer |
-
2017
- 2017-11-22 CN CN201721580006.6U patent/CN207586456U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116106999A (en) * | 2023-04-13 | 2023-05-12 | Tcl华星光电技术有限公司 | Light diffusion film and polarizer |
| CN116106999B (en) * | 2023-04-13 | 2023-08-22 | Tcl华星光电技术有限公司 | Light diffusion film and polarizer |
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| CP02 | Change in the address of a patent holder |
Address after: 517000 No. 1 and No. 2 Xuanlang Industrial Park, Henan Road, Baipu, Linjiang Town, Jiangdong New Area, Heyuan City, Guangdong Province Patentee after: GUANGDONG XUAN LANG INDUSTRIAL Co.,Ltd. Address before: 523713 1st and 2nd floors of Building A, 352 Xiangyang Road, Shigu Management Zone, Tangxia Town, Dongguan City, Guangdong Province Patentee before: GUANGDONG XUAN LANG INDUSTRIAL Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230529 Address after: 517000 1st floor, building 1, xuanlang Industrial Park, Henan Baipu Road, Heyuan Jiangdong new area industrial park, Lianxin village, Linjiang Town, Heyuan City, Guangdong Province Patentee after: Chuang Liansheng photoelectric (Guangdong) Co.,Ltd. Address before: 517000 Heyuan, Guangdong Jiangdong new district, Linjiang Town, Lian Xin Village, Po Po, Henan Road, Lang Lang Industrial Park first, second Patentee before: GUANGDONG XUAN LANG INDUSTRIAL Co.,Ltd. |