CN202631769U - Optical film with brightening and diffusion functions - Google Patents
Optical film with brightening and diffusion functions Download PDFInfo
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- CN202631769U CN202631769U CN 201220233838 CN201220233838U CN202631769U CN 202631769 U CN202631769 U CN 202631769U CN 201220233838 CN201220233838 CN 201220233838 CN 201220233838 U CN201220233838 U CN 201220233838U CN 202631769 U CN202631769 U CN 202631769U
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Abstract
The utility model relates to the field of liquid crystal displays and especially relates to an optical film. The optical film with brightening and diffusion functions is composed of a basement layer and a micro lens group layer. A second surface of the basement layer is light facing and receiving a light source, the micro lens group layer is arranged on a first surface of the basement layer, the second surface is a smooth surface, and the micro lens group layer is composed of a plurality of uniformly-arranged micro lens structures. Each micro lens structure includes a cylindrical flange base and a hemispherical lens, the bottom surface of the flange base is arranged on the first surface of the basement layer, and the bottom plane of the lens is connected with the top surface of the flange base. By adopting the technical scheme, the optical film not only has good light diffusion effect, but also has higher light gathering power to achieve certain optical brightening effect. The optical film can bring higher optical brightness for a backlight module when used in the backlight module and can keep the same optical uniformity; and the number of used films can be reduced and the cost can be lowered.
Description
Technical field
The utility model relates to field of liquid crystal, relates in particular to a kind of optical thin film.
Background technology
Along with the development of DTV, in the competition of field of display, LCD received consumer and dealer's attention constantly in recent years, on the sales volume of product, also continued to remain on high long rate.Wherein, the imaging mode of LCD utilizes the switch of electric field and drives and demonstrate high-quality picture, and liquid crystal panel itself can't emit beam, and must the display light source be provided by backlight module.
In general, backlight module is by light emitting source, and LGP and blooming are like diffusion barrier; Reflectance coating, compositions such as brightening piece, diffusion barrier are the tops that is positioned at LGP; It can be done scattering to the light that sees through LGP and handle, and lets the more even distribution of light, to reach the effect of atomizing.
General diffusion barrier commonly used is to utilize transparent fine grained as scattering particle; And use cement and rigidizer to produce the interlinkage reaction; Scattering particle is attached to the substrate of high light transmittance, this optics behavior is to utilize light to pass the effect that the scattering particle face produces the light diffusion.In addition, bad for fear of scattering particle and substrate attachment property, influence the running of backlight module, can use cement so that scattering particle tack preferably to be provided usually, yet excessive cement coat scattering particle, but can cause the brightness of diffusion barrier to reduce.The optical diffusion that adopts application pattern to produce mainly comprises transparency carrier, last overlay and go up scattering particle reach with following overlay under scattering particle.Diffusion barrier mainly relies in the overlay scattering particle of stroll at random and different size that the incident ray that gets in the coating is carried out abundant scattering, so that the direction stochastic distribution of emergent ray, thereby with the distribution of light homogenising of incident.Simultaneously, owing to have the larger-size particle of minority partly to be exposed to outside the coating surface in the upper surface of film, formed the shape that is similar to lens surface, thereby made film have certain light gathering.Yet in this structure, because the number of particles that can protrude in outside the figure layer is less, so the light gathering of this film is very limited.And the distribution of the geomery of particle is very wide, though can increase the optics diffusivity of film, can not guarantee the light gathering of film, makes that directly the brightness of the liquid crystal indicator of this film of use is not high.
A kind of in addition job operation of conventional diffusion film is to adopt through adding a certain amount of light diffusing agent in material main body; Through the small-size effect of light diffusion particle and the chondritic of particle itself; When realizing that light passes through; Form the repeatedly diffuse reflection and the refraction of light, thereby realize the even dispersion and the soft property of the light of outgoing, reach the purpose of diffusion.But, need to add a large amount of light diffusing agents and could realize higher diffusion effect for the product of very thin thickness film.Simultaneously, because a large amount of light diffusing agent that adds can reduce the transmittance of material itself, and increase cost, in being applied to module backlight, do not have good advantage.
Generally speaking, being applied in large-sized LCD is directly-down light source, and directly-down light source can be by the increase of fluorescent tube, reaches the requirement of high brightness and uniform source of light with the design of diffusion component.In order to reach the requirement of high brightness, direct type backlight module must use rhombus lens, as light is concentrated the convergent important component.So-called rhombus lens, main function are the travel paths that is used to change light, through the three-legged structure on surface, its light are concentrated toward normal direction, reach for this reason and improve the third side to brightness.Though yet the spotlight effect of early stage rhombus lens meet the requirements owing to use the UV hardening process, must by optical forming glue with the shape transcription on the mould on base material, the manufacturing approach of rhombus lens uses optical cement that the shape transcription on the mould is formed on the base material; Must be through gluing, pressing, sclerosis is shaped, and is release waits job procedure; But in release process, easy improper because of operation caused the defective of outward appearance; So manufacturing approach is not only numerous and diverse, the production run difficulty causes yield not high simultaneously.
In addition,, produce the phenomenon of warpage, influence test result because base material with the difference of shrinkage factor between shaping glue, will cause rhombus lens in reliable test.In the structure of existing rhombus lens, must use on the UV cured coating shaping base material, often cause scratch, the release not good defective that causes, its complex process and to produce yield low.
Summary of the invention
The utility model technical matters to be solved provides a kind of optical thin film with blast diffusion function; Through microlens structure diffusion barrier and brightening piece are united two into one, can reduce diaphragm and use number, reduce cost; And have optical brightness and promote efficient diffusion function.
The utility model is achieved in that a kind of optical thin film with blast diffusion function; Constitute by basic unit and lenticule group layer two parts; The second surface of said basic unit is the light that receives light source towards light source; Second surface is a smooth surface, and said lenticule group layer is arranged on the first surface of basic unit, and lenticule group layer is uniformly distributed with by some microlens structures and rearranges; Said microlens structure comprises flange substrate and lens, and said flange substrate is cylindrical, and said lens are semisphere, and the bottom surface of flange substrate is arranged on the first surface of basic unit, and the lens base plane links to each other with the end face of flange substrate.
Said microlens structure closely pastes two-dimensional array mutually on the first surface of basic unit, and promptly the centre distance of two adjacent microlens structures is these two microlens structure bottom surface radius sums arbitrarily.
The end face diameter of said flange substrate is identical with the bottom surface diameter of lens, the applying edge smooth transition between flange substrate and the lens.
The diameter of said flange substrate is 5 μ m ~ 100 μ m.
The diameter ratio of the height of said flange substrate and lens base plane is 0.1 ~ 0.2.
Said basic unit and lenticule group layer two parts are processed by same material, and are as a whole.
The optical index of said basic unit and lenticule group layer is 1.2 ~ 1.8.
The optical thin film that the utlity model has the blast diffusion function is provided with the microlens structure of certain size, shape and arrangement through the shady face in basic unit; Thereby make this optical thin film that light diffusion effect preferably not only arranged, and have higher light gathering to reach the effect of certain optical brightening; Diffusibleness has been improved in the gap of adopting cylindrical bottom to cause in application; The utility model optical microlens film is applied in the module backlight, can brings higher optical brightness, and keep identical optics uniformity coefficient for module backlight; Can also reduce diaphragm and use number, reduce cost.
Description of drawings
Fig. 1 is that the optical thin-film structure master who the utlity model has the blast diffusion function looks synoptic diagram;
Fig. 2 is the optical thin-film structure schematic top plan view that the utlity model has the blast diffusion function;
Fig. 3 is a microlens structure enlarged diagram in the utility model.
Among the figure: 1 basic unit, 2 lenticule group layers, 21 flange substrates, 22 lens.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Like Fig. 1,2, shown in 3; A kind of optical thin film with blast diffusion function is made up of with lenticule group layer 2 two parts basic unit 1, and the second surface of said basic unit 1 is the light that receives light source towards light source; Second surface is a smooth surface, thereby has reduced material itself to the reflection of light rate; Said lenticule group layer 2 is arranged on the first surface of basic unit 1, and lenticule group layer 2 is uniformly distributed with by some microlens structures and rearranges; Said microlens structure comprises flange substrate 21 and lens 22, and said flange substrate 21 is cylindrical, and said lens 22 are semisphere, and the bottom surface of flange substrate 21 is arranged on the first surface of basic unit 1, and lens 22 base plane link to each other with the end face of flange substrate 21; Light is from the second surface incident of basic unit 1; After getting into optical thin film, reached the effect that optics spreads by continuous reflected refraction; Lenticule group layer 2 can make light assemble to the top of lens 22 simultaneously, forms spotlight effect, and diffusibleness also can be improved in the gap that cylindrical bottom causes in application.
The utility model can further describe to said microlens structure and closely paste two-dimensional array mutually on the first surface of basic unit 1; Promptly the centre distance of two adjacent microlens structures is these two microlens structure bottom surface radius sums arbitrarily, to reach the first surface that farthest takies basic unit 1.
In the present embodiment, the end face diameter of said flange substrate 21 is identical with the bottom surface diameter of lens 22, the applying edge smooth transition between flange substrate 21 and the lens 22.
As preferably, the diameter of said flange substrate 21 is 5 μ m ~ 100 μ m, and the diameter of flange substrate in the present embodiment 21 is 40 μ m.
In the present embodiment, in order to obtain best blast diffusion effect, the ratio of the diameter D of the height h of said flange substrate 21 and lens 22 base plane is 0.1 ~ 0.2.
In the utility model, generally, said basic unit 1 is processed by same material with lenticule group layer 2 two parts, and is as a whole; Basic unit 1 uses existing polycarbonate, polystyrene PS, polyethylene terephthalate PET, copolyester PETG, acrylic PMMA etc. as material with lenticule group layer 2 usually; In order to improve the effect of diffusion and blast, the optical index of the material of selecting for use is 1.2 ~ 1.8.
In the backlight for liquid crystal display module of reality installation, use optical thin film that the utlity model has the blast diffusion function and the optics intensity contrast that tradition applies diffusion barrier to see the following form:
Simultaneously, its optics uniformity coefficient contrast is:
Can see that from above result the utility model can make module system backlight bring higher optical brightness, and keep identical even higher optics uniformity coefficient.
Claims (7)
1. optical thin film with blast diffusion function; It is characterized in that: constitute by basic unit (1) and lenticule group layer (2) two parts; The second surface of said basic unit (1) is the light that receives light source towards light source; Second surface is a smooth surface, and said lenticule group layer (2) is arranged on the first surface of basic unit (1), and lenticule group layer (2) is uniformly distributed with by some microlens structures and rearranges; Said microlens structure comprises flange substrate (21) and lens (22); Said flange substrate (21) is cylindrical; Said lens (22) are semisphere, and the bottom surface of flange substrate (21) is arranged on the first surface of basic unit (1), and lens (22) base plane links to each other with the end face of flange substrate (21).
2. the optical thin film with blast diffusion function as claimed in claim 1; It is characterized in that: said microlens structure closely pastes two-dimensional array mutually on the first surface of basic unit (1), and promptly the centre distance of two adjacent microlens structures is these two microlens structure bottom surface radius sums arbitrarily.
3. the optical thin film with blast diffusion function as claimed in claim 2 is characterized in that: the end face diameter of said flange substrate (21) is identical with the bottom surface diameter of lens (22), the applying edge smooth transition between flange substrate (21) and the lens (22).
4. the optical thin film with blast diffusion function as claimed in claim 2 is characterized in that: the diameter of said flange substrate (21) is 5 μ m ~ 100 μ m.
5. the optical thin film with blast diffusion function as claimed in claim 1 is characterized in that: the diameter ratio of the height of said flange substrate (21) and lens (22) base plane is 0.1 ~ 0.2.
6. like the described optical thin film with blast diffusion function of any claim in the claim 1 ~ 5, it is characterized in that: said basic unit (1) and lenticule group layer (2) two parts are processed by same material, and are as a whole.
7. the optical thin film with blast diffusion function as claimed in claim 6 is characterized in that: the optical index of said basic unit (1) and lenticule group layer (2) is 1.2 ~ 1.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233838 CN202631769U (en) | 2012-05-23 | 2012-05-23 | Optical film with brightening and diffusion functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220233838 CN202631769U (en) | 2012-05-23 | 2012-05-23 | Optical film with brightening and diffusion functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631769U true CN202631769U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220233838 Expired - Lifetime CN202631769U (en) | 2012-05-23 | 2012-05-23 | Optical film with brightening and diffusion functions |
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| CN (1) | CN202631769U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891920A (en) * | 2016-05-26 | 2016-08-24 | 福建正德光电科技有限公司 | Columnar diffusion film, prism brightness-enhancement film and prism diffusion film composite diffusion plate |
| CN107976727A (en) * | 2017-12-21 | 2018-05-01 | 深圳市光科全息技术有限公司 | A kind of LED picture quality enhancements film |
-
2012
- 2012-05-23 CN CN 201220233838 patent/CN202631769U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891920A (en) * | 2016-05-26 | 2016-08-24 | 福建正德光电科技有限公司 | Columnar diffusion film, prism brightness-enhancement film and prism diffusion film composite diffusion plate |
| CN107976727A (en) * | 2017-12-21 | 2018-05-01 | 深圳市光科全息技术有限公司 | A kind of LED picture quality enhancements film |
| CN107976727B (en) * | 2017-12-21 | 2024-05-14 | 深圳市光科全息技术有限公司 | LED image quality enhancement film |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |