CN213750382U - Interference reduction type brightness enhancement film - Google Patents
Interference reduction type brightness enhancement film Download PDFInfo
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- CN213750382U CN213750382U CN202022768088.5U CN202022768088U CN213750382U CN 213750382 U CN213750382 U CN 213750382U CN 202022768088 U CN202022768088 U CN 202022768088U CN 213750382 U CN213750382 U CN 213750382U
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Abstract
The utility model provides a subtract interference type brightness enhancement film, includes prism layer and optics base film, the prism layer including the strip prism that is parallel to each other, each strip prism highly the same, be equipped with the back coating between prism layer and the optics base film, the back coating include first strip layer and second strip layer, first strip layer and second strip layer be parallel to each other and arrange in turn, the refracting index on first strip layer and second strip layer is different, first strip layer and second strip layer all correspond with a strip prism. The utility model discloses because the back coating comprises the strip of two kinds of different refracting indexes, and appears in turn, has better interference effect that subtracts.
Description
Technical Field
The utility model relates to a brightness enhancement film.
Background
The main optical films of the liquid crystal backlight system comprise a diffusion film, a brightness enhancement film and a reflection film. The brightness enhancement film has the function of reconverging most of light rays passing through the diffusion sheet into the central viewing angle, so that the front-view brightness is remarkably improved, and the loss of scattered light rays with low exit angles is reduced.
The brightness enhancement film generally adopts an isosceles triangular strip-shaped microprism structure, the vertex angle of the prism is fixed and is generally 90 degrees with the best brightness. Such brightness enhancement films can interfere with use due to the ordered prismatic structure.
At present, the interference problem is improved by adopting a prism with fluctuation and fluctuation up and down, but the production process is complex due to the fact that the prism with fluctuation is manufactured, the prism is inconvenient to peel off from a copper rod, and then a series of production problems are generated.
Disclosure of Invention
In order to overcome the above-mentioned not enough of current brightness enhancement film, the utility model provides a subtract interference type brightness enhancement film.
The technical proposal of the utility model for solving the technical problem is that: the utility model provides a subtract interference type brightness enhancement film, includes prism layer and optics base film, the prism layer including the strip prism that is parallel to each other, each strip prism highly the same, be equipped with the back coating between prism layer and the optics base film, the back coating include first strip layer and second strip layer, first strip layer and second strip layer be parallel to each other and arrange in turn, the refracting index on first strip layer and second strip layer is different, first strip layer and second strip layer all correspond with a strip prism.
Further, the thicknesses of the first strip-shaped layer and the second strip-shaped layer are equal.
Further, the thickness of the first strip-shaped layer and the thickness of the second strip-shaped layer are both 2-4 μm.
Further, the longitudinal section of the strip prism is in an isosceles triangle shape.
The beneficial effects of the utility model reside in that: the back coating consists of two strips with different refractive indexes, and the strips alternately appear, so that the back coating has a better interference reduction effect.
Drawings
Fig. 1 is a sectional view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, an interference reduction type brightness enhancement film includes a prism layer and an optical base film 1, where the prism layer includes strip prisms 2 parallel to each other, heights of the strip prisms 2 are the same, and a longitudinal section of each strip prism 2 is an isosceles triangle in this embodiment. The material of the strip-shaped prisms 2 is generally PET, and the material of the optical base film 1 is also generally PET.
Be equipped with the back coating between prism layer and the optics base film 1, the back coating include first strip layer 3 and second strip layer 4, first strip layer 3 and second strip layer 4 be parallel to each other and arrange in turn, the refracting index of first strip layer 3 and second strip layer 4 is different, and first strip layer 3 and second strip layer 4 all correspond with a strip prism 2. Various resins can be used for the first stripe layers 3 and the second stripe layers 4, and two different resins are used for obtaining different refractive indexes.
In this embodiment, the thicknesses of the first stripe layer 3 and the second stripe layer 4 are equal and are both 2-4 μm.
The utility model discloses because the back coating comprises the strip of two kinds of different refracting indexes, and appears in turn, has better interference effect that subtracts.
Claims (4)
1. The utility model provides a subtract interference type brightness enhancement film, includes prism layer and optics base film, the prism layer including the strip prism that is parallel to each other, its characterized in that: the height of each strip prism is the same, be equipped with the back coating between prism layer and the optics base film, the back coating include first strip layer and second strip layer, first strip layer and second strip layer be parallel to each other and arrange in turn, the refracting index of first strip layer and second strip layer is different, first strip layer and second strip layer all correspond with a strip prism.
2. The interference reduction type brightness enhancement film according to claim 1, wherein: the first strip-shaped layer and the second strip-shaped layer are equal in thickness.
3. The interference reduction type brightness enhancement film according to claim 2, wherein: the thickness of the first strip-shaped layer and the thickness of the second strip-shaped layer are both 2-4 mu m.
4. The interference reduction type brightness enhancement film according to one of claims 1-3, wherein: the longitudinal section of the strip-shaped prism is in an isosceles triangle shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022768088.5U CN213750382U (en) | 2020-11-26 | 2020-11-26 | Interference reduction type brightness enhancement film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022768088.5U CN213750382U (en) | 2020-11-26 | 2020-11-26 | Interference reduction type brightness enhancement film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213750382U true CN213750382U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022768088.5U Active CN213750382U (en) | 2020-11-26 | 2020-11-26 | Interference reduction type brightness enhancement film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213750382U (en) |
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2020
- 2020-11-26 CN CN202022768088.5U patent/CN213750382U/en active Active
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