CN113534310B - Diffusion film with uniform light diffusion and production process thereof - Google Patents
Diffusion film with uniform light diffusion and production process thereof Download PDFInfo
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- CN113534310B CN113534310B CN202110825241.XA CN202110825241A CN113534310B CN 113534310 B CN113534310 B CN 113534310B CN 202110825241 A CN202110825241 A CN 202110825241A CN 113534310 B CN113534310 B CN 113534310B
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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
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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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
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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
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
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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
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
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Abstract
The invention discloses a diffusion film with uniform light diffusion and a production process thereof, belonging to the technical field of diffusion films. The invention provides a diffusion film with uniform light diffusion and a production process thereof.A first light filter and a second light filter light rays with specific angles, so that the light rays passing through a lens layer are in a direction with stable angles, and the phenomenon that local light rays are too much or small is avoided.
Description
Technical Field
The invention relates to the technical field of diffusion films, in particular to a diffusion film with uniform light diffusion and a production process thereof.
Background
The diffusion film is one of the most important optical films used in a backlight module of a liquid crystal display, and has a main function of dispersing and homogenizing light emitted from a light source in the backlight. In order to achieve the condition of uniform light dispersion, the light is dispersed by utilizing the refractive index difference among resin, PET and organic particles and the filling and diffuse reflection functions of the organic particles, and the light has certain haze to shield the lamp shadow.
In order to achieve good light scattering and shielding effects, the following method is generally adopted to prepare a diffusion film: firstly, preparing a coating solution from solvent type resin glue, organic particles, a curing agent and an auxiliary agent according to a certain proportion, coating the coating solution on the surface of PET, volatilizing the solvent through an oven, curing and forming to form a glue layer with the organic particles on the surface of the PET, namely the diffusion film. The preparation of diffusion membranes in this way requires the use of sophisticated coating equipment, the use of large amounts of organic solvents and certain requirements on process control. There are disadvantages from the viewpoint of cost, environment and health.
Because the connection part of the diffusion film and the fixing sheet is too much, the diffusion film is easy to wrinkle when being adhered, so that the diffusion film is not adhered on the light guide plate neatly; secondly, again because the diffuser film has too many sections attached to the anchor sheet, it diffuses light unevenly.
Disclosure of Invention
The present invention is directed to a diffuser film with uniform light diffusion and a manufacturing process thereof, so as to solve the problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a diffusion barrier that light diffusion is even, includes diffusion piece, PET membrane, diffusion piece, anti-scratch layer and lens layer down, goes up diffusion piece, PET membrane, lens layer and diffusion piece down and from last stack in proper order down, and anti-scratch layer cladding is on last diffusion piece and the diffusion piece is located the outside surface down.
Furthermore, the lens layer comprises a first optical filter, a second optical filter, an adhesive layer and a TFT substrate which are sequentially connected from top to bottom, the first optical filter, the TFT substrate and the second optical filter are sequentially overlapped from top to bottom, and the first optical filter, the TFT substrate and the second optical filter are fixed through the adhesive layer.
Furthermore, a first embedding groove and a second embedding groove are respectively processed on the opposite surfaces of the upper diffusion sheet and the lower diffusion sheet, the first embedding groove of the upper diffusion sheet is in contact connection with the top surface of the PET film, and the second embedding groove of the lower diffusion sheet is in contact connection with the bottom surface of the second optical filter.
Further, the length direction of the first embedding groove and the second embedding groove is inclined along the upper diffusion sheet and the lower diffusion sheet horizontal plane, the length inclination angle of the first embedding groove and the second embedding groove is the same, the height direction of the first embedding groove and the second embedding groove is inclined along the upper diffusion sheet and the lower diffusion sheet vertical plane, the height inclination angle of the first embedding groove and the second embedding groove is the same, and the first embedding groove and the second embedding groove are overlapped in the same direction, so that the first embedding groove and the second embedding groove are arranged in parallel at equal intervals.
Furthermore, the first embedding groove and the second embedding groove are filled with optical light diffusion particles, and the optical light diffusion particles are spherical and have different particle sizes.
The invention provides another technical scheme, which comprises a production process of a diffusion film with uniform light diffusion, and comprises the following steps;
s1: preparing a composition for a diffusion film;
s2: the first optical filter, the second optical filter and the TFT substrate are coated with adhesive layers, the first optical filter, the second optical filter and the TFT substrate are adhered together by the adhesive layers, and the PET film is attached to the first optical filter;
s3: the upper diffusion sheet and the lower diffusion sheet are moved to a processing lathe, and a drill bit on the lathe processes the surfaces of the first optical filter and the second optical filter at an inclined angle to form a first embedding groove and a second embedding groove;
s4: and pouring a diffusion particle solution into the first embedding groove and the second embedding groove, placing the first embedding groove and the second embedding groove in a dryer for quick drying, and respectively bonding the upper diffusion sheet and the lower diffusion sheet on the PET film and the second optical filter.
Further, for S4, the groove depth of the first damascene groove and the second damascene groove is in the range of 1 to 40 μm.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a diffusion film with uniform light diffusion and a production process thereof, wherein a first light filter and a second light filter light rays with specific angles, the light rays passing through a lens layer are in a stable angle direction, the phenomenon that local light rays are too much or the local light rays are small is avoided, a first embedding groove and a second embedding groove are overlapped in the same direction, the first embedding groove and the second embedding groove are arranged in parallel at equal intervals, the light rays passing through the lens layer are refracted and scattered in multiple angles due to the inclined arrangement of the first embedding groove and the second embedding groove, and the refracted light rays are stably output when direct light enters, and are further uniformly diffused after being scattered in all the light rays entering the part.
Drawings
FIG. 1 is a side view of a diffusion membrane of the present invention;
FIG. 2 is a side view of the first and second slots of the present invention;
FIG. 3 is a top view of the first and second slots of the present invention;
FIG. 4 is a side view of the first and second slots of the present invention in another position;
fig. 5 is a plan view showing another position of the first and second mosaic slots according to the present invention;
in the figure: 1. an upper diffusion sheet; 11. a first damascene groove; 2. a PET film; 3. a lower diffusion sheet; 31. a second damascene groove; 4. an anti-scratch layer; 5. a lens layer; 51. a first optical filter; 52. a second optical filter; 53. a bonding layer; 54. a TFT substrate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, a diffusion film with uniform light diffusion includes an upper diffusion sheet 1, a PET film 2, a lower diffusion sheet 3, an anti-scratch layer 4, and a lens layer 5, wherein the upper diffusion sheet 1, the PET film 2, the lens layer 5, and the lower diffusion sheet 3 are sequentially stacked from top to bottom, and the anti-scratch layer 4 is coated on the outer surfaces of the upper diffusion sheet 1 and the lower diffusion sheet 3.
The lens layer 5 comprises a first optical filter 51, a second optical filter 52, an adhesive layer 53 and a TFT substrate 54 which are sequentially connected from top to bottom, the first optical filter 51, the TFT substrate 54 and the second optical filter 52 are sequentially overlapped from top to bottom, the first optical filter 51, the TFT substrate 54 and the second optical filter 52 are fixed through the adhesive layer 53, the first optical filter 51 and the second optical filter 52 filter light rays at specific angles, the light rays penetrating through the lens layer 5 are in a stable angle direction, and excessive local light rays or small local light rays are avoided.
The opposite surfaces of the upper diffusion sheet 1 and the lower diffusion sheet 3 are respectively provided with a first embedding groove 11 and a second embedding groove 31, the first embedding groove 11 of the upper diffusion sheet 1 is in contact connection with the top surface of the PET film 2, and the second embedding groove 31 of the lower diffusion sheet 3 is in contact connection with the bottom surface of the second filter 52.
Referring to fig. 2 to 3, the first and second damascene grooves 11 and 31 are formed to have a length direction inclined along a horizontal plane of the upper and lower diffusion sheets 1 and 3, and have a length inclination angle equal to that of the first and second damascene grooves 11 and 31, and the first and second damascene grooves 11 and 31 are formed to have a height direction inclined along a vertical plane of the upper and lower diffusion sheets 1 and 3, and have a height inclination angle equal to that of the first and second damascene grooves 11 and 31, wherein the first and second damascene grooves 11 and 31 are stacked in the same direction such that the first and second damascene grooves 11 and 31 are arranged in parallel at equal intervals therebetween, and a light ray passing through the lens layer 5 is refracted and scattered at multiple angles due to the inclined arrangement of the first and second damascene grooves 11 and 31, and a stable output refracted light ray is input while a direct light is input, and is further uniformly diffused after being dispersed among all light rays input to the portion.
A production process of a diffusion film with uniform light diffusion comprises the following steps;
the method comprises the following steps: preparing a composition for a diffusion film;
step two: the first filter 51, the second filter 52 and the TFT substrate 54 are coated with an adhesive layer 53, the first filter 51, the second filter 52 and the TFT substrate 54 are adhered together by the adhesive layer 53, and the PET film 2 is adhered to the first filter 51;
step three: the upper diffusion sheet 1 and the lower diffusion sheet 3 are moved to a processing lathe, and a drill on the lathe processes the surfaces of the first filter 51 and the second filter 52 at an inclined angle to form a first embedding groove 11 and a second embedding groove 31;
step four: and pouring the diffusion particle solution into the first mosaic grooves 11 and the second mosaic grooves 31, wherein the groove depths of the first mosaic grooves 11 and the second mosaic grooves 31 are in the range of 1-40 mu m, placing the mosaic grooves in a dryer for quick drying, and the first mosaic grooves 11 and the second mosaic grooves 31 of the upper diffusion sheet 1 and the lower diffusion sheet 3 are respectively bonded on the PET film 2 and the second optical filter 52 in parallel.
The second embodiment:
referring to fig. 4 to 5, the length directions of the first and second damascene grooves 11 and 31 are inclined along the horizontal planes of the upper and lower diffusion sheets 1 and 3, and the length inclination angles of the first and second damascene grooves 11 and 31 are the same, the height directions of the first and second damascene grooves 11 and 31 are inclined along the vertical planes of the upper and lower diffusion sheets 1 and 3, and the height inclination angles of the first and second damascene grooves 11 and 31 are the same, wherein the first and second damascene grooves 11 and 31 are overlapped in opposite directions so that the first and second damascene grooves 11 and 31 are in a staggered position when viewed from the top, and by the staggered arrangement, the light passes through the first damascene groove 11 to be refracted and then continues to pass through the second damascene groove 31, and since the inclined planes of the first and second damascene grooves 11 and 31 are symmetrical, the refracted angles of the dispersed light are the same, and the diffusion range thereof is increased.
A production process of a diffusion film with uniform light diffusion comprises the following steps;
the method comprises the following steps: preparing a composition for a diffusion film;
step two: the first optical filter 51, the second optical filter 52 and the TFT substrate 54 are coated with an adhesive layer 53, the first optical filter 51, the second optical filter 52 and the TFT substrate 54 are adhered together by the adhesive layer 53, and the PET film 2 is adhered to the first optical filter 51;
step three: the upper diffusion sheet 1 and the lower diffusion sheet 3 are moved to a processing lathe, and a drill on the lathe processes the surfaces of the first filter 51 and the second filter 52 at an inclined angle to form a first embedding groove 11 and a second embedding groove 31;
step four: and pouring the diffusion particle solution into the first embedding groove 11 and the second embedding groove 31, placing the first embedding groove 11 and the second embedding groove 31 in the range of 1-40 mu m in depth, placing the two embedding grooves into a dryer for quick drying, and respectively bonding the first embedding groove 11 and the second embedding groove 31 of the upper diffusion sheet 1 and the lower diffusion sheet 3 on the PET film 2 and the second optical filter 52 in a staggered manner.
In conclusion; the invention relates to a diffusion film with uniform light diffusion and a production process thereof.A first light filter 51 and a second light filter 52 filter light rays with specific angles, so that the light rays passing through a lens layer 5 are in a stable angle direction, and local light rays are prevented from being too much or smaller, a first embedding groove 11 and a second embedding groove 31 are overlapped in the same direction, then the first embedding groove 11 and the second embedding groove 31 are arranged in parallel at equal intervals, and the light rays passing through the lens layer 5 are refracted and scattered in multiple angles due to the inclined arrangement of the first embedding groove 11 and the second embedding groove 31, and the refracted light is stably output when direct light enters, and is further uniformly diffused after being scattered in all the light rays entering the part.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (3)
1. The diffusion film with uniform light diffusion is characterized by comprising an upper diffusion sheet (1), a PET (polyethylene terephthalate) film (2), a lower diffusion sheet (3), an anti-scratching layer (4) and a lens layer (5), wherein the upper diffusion sheet (1), the PET film (2), the lens layer (5) and the lower diffusion sheet (3) are sequentially overlapped from top to bottom, and the anti-scratching layer (4) is coated on the outer surfaces of the upper diffusion sheet (1) and the lower diffusion sheet (3);
the lens layer (5) comprises a first optical filter (51), a second optical filter (52), an adhesive layer (53) and a TFT substrate (54) which are sequentially connected from top to bottom, the first optical filter (51), the TFT substrate (54) and the second optical filter (52) are sequentially overlapped from top to bottom, and the first optical filter (51), the TFT substrate (54) and the second optical filter (52) are fixed through the adhesive layer (53);
the opposite surfaces of the upper diffusion sheet (1) and the lower diffusion sheet (3) are respectively provided with a first embedding groove (11) and a second embedding groove (31), the first embedding groove (11) of the upper diffusion sheet (1) is in contact connection with the top surface of the PET film (2), and the second embedding groove (31) of the lower diffusion sheet (3) is in contact connection with the bottom surface of the second optical filter (52);
the length directions of the first embedding groove (11) and the second embedding groove (31) are obliquely arranged along the horizontal planes of the upper diffusion sheet (1) and the lower diffusion sheet (3), the length inclination angles of the first embedding groove (11) and the second embedding groove (31) are the same, the height directions of the first embedding groove (11) and the second embedding groove (31) are obliquely arranged along the vertical planes of the upper diffusion sheet (1) and the lower diffusion sheet (3), and the height inclination angles of the first embedding groove (11) and the second embedding groove (31) are the same, wherein the first embedding groove (11) and the second embedding groove (31) are overlapped in the same direction, so that the first embedding groove (11) and the second embedding groove (31) are arranged in parallel at equal intervals;
the first mosaic groove (11) and the second mosaic groove (31) are filled with optical light diffusion particles, and the optical light diffusion particles are spherical and have different particle sizes.
2. A process for producing a light diffusing film according to claim 1, comprising the steps of;
s1: preparing a composition for a diffusion film;
s2: the first optical filter (51), the second optical filter (52) and the TFT substrate (54) are coated with an adhesive layer (53), the first optical filter (51), the second optical filter (52) and the TFT substrate (54) are adhered together by the adhesive layer (53), and the PET film (2) is adhered to the first optical filter (51);
s3: the upper diffusion sheet (1) and the lower diffusion sheet (3) move to a processing lathe, and a drill on the lathe processes the surfaces of the first optical filter (51) and the second optical filter (52) at an inclined angle to form a first embedding groove (11) and a second embedding groove (31);
s4: and pouring diffusion particle solution into the first embedding groove (11) and the second embedding groove (31), placing the solution into a dryer for quick drying, and respectively bonding the upper diffusion sheet (1) and the lower diffusion sheet (3) on the PET film (2) and the second optical filter (52).
3. The process for producing a diffusion film with uniform light diffusion according to claim 2, wherein the first damascene groove (11) and the second damascene groove (31) have a groove depth in the range of 1 to 40 μm in step S4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110825241.XA CN113534310B (en) | 2021-07-21 | 2021-07-21 | Diffusion film with uniform light diffusion and production process thereof |
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| CN202110825241.XA CN113534310B (en) | 2021-07-21 | 2021-07-21 | Diffusion film with uniform light diffusion and production process thereof |
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| CN113534310A CN113534310A (en) | 2021-10-22 |
| CN113534310B true CN113534310B (en) | 2023-04-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238182B (en) * | 2014-09-30 | 2017-04-05 | 深圳市华星光电技术有限公司 | Liquid crystal indicator |
| CN204883067U (en) * | 2015-07-30 | 2015-12-16 | 河南中基阳光电子技术有限公司 | 45 light filter assembly device |
| CN105974641B (en) * | 2016-06-20 | 2019-02-22 | 京东方科技集团股份有限公司 | Display device and its color membrane substrates |
| CN107726142B (en) * | 2017-10-20 | 2020-05-19 | 友达光电（苏州）有限公司 | Backlight module and display device |
| CN209264993U (en) * | 2018-11-27 | 2019-08-16 | 深圳市津田电子有限公司 | A kind of complex optics diffusion barrier |
| CN212460260U (en) * | 2020-04-14 | 2021-02-02 | 深圳市诺威电子有限公司 | Diffusion film and polarizing plate with same |
| CN111399287B (en) * | 2020-05-28 | 2022-11-04 | 马鞍山东毅新材料科技有限公司 | Arc-shaped diffusion film for LCD backlight source and preparation method thereof |
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