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Brightening film and preparation method thereof

A technology of brightness-enhancing film and light-gathering layer, which is applied in the field of optical films, can solve the problems of excessive brightness attenuation, aging resistance of brightness-enhancing film, and poor high-temperature resistance, so as to achieve increased concentration, high refractive index, and good aging resistance Effect

Inactive Publication Date: 2016-05-25
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a brightness enhancement film and its preparation method to solve the problems of poor aging resistance, high temperature resistance and excessive brightness decay of the brightness enhancement film in the prior art

Method used

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  • Brightening film and preparation method thereof
  • Brightening film and preparation method thereof
  • Brightening film and preparation method thereof

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preparation example Construction

[0045] In addition, the present invention also provides a method for preparing a brightness enhancement film, which includes the following steps: forming a light-gathering layer 200 composed of a plurality of light-gathering structures on the upper surface of a substrate 100; As the raw material of the refraction layer 300, the slurry to be cured of the nanoparticles is sprayed on the upper surface of the light-gathering layer 200, and after drying, it is 2 After the photocuring treatment under the ultraviolet light, the refraction layer 300 with the concavo-convex structure matching the upper surface of the light concentrating layer 200 is formed on the upper surface; wherein, the nanoparticle slurry to be cured includes an inorganic nanoparticle composition and a volatile solvent , the inorganic nanoparticle composition includes inorganic nanoparticles, a first diluting monomer, a first photoinitiator and a first surface additive.

[0046]In the above preparation method prov...

Embodiment 1

[0050] Substrate:

[0051] Using polyethylene terephthalate (PET) film as the substrate;

[0052] Production of light-concentrating layer:

[0053] A 9-inch self-made metal mother board is placed on a hot plate and heated to 60°C. The metal mother board is composed of linear arrangements of 90-degree isosceles triangular prisms with a nominal pitch interval of 50 microns. The UV-curable resin composition (refractive index: 1.6, see the table below for the composition) was applied to the master tool using a disposable pipette. Orient the PET film so that the orientation of the linear prisms is roughly perpendicular (90 ± 20°) to the high-gain axis of the film. The master tool, photocurable resin composition and PET film were then passed through a heated nip roll at 60° C., which applied sufficient pressure to completely fill the master tool with the resin while removing entrapped air. The filled master tool was then exposed twice to UV radiation from a "D-tube" at a line spe...

Embodiment 2

[0060] Substrate:

[0061] Using polyethylene terephthalate (PET) film as the substrate;

[0062] Production of light-concentrating layer:

[0063] A 9-inch self-made metal mother board is placed on a hot plate and heated to 60°C. The metal mother board is composed of linear arrangements of 90-degree isosceles triangular prisms with a nominal pitch interval of 50 microns. The UV-curable resin composition (refractive index: 1.6, see the table below for the composition) was applied to the master tool using a disposable pipette. Orient the PET film so that the orientation of the linear prisms is roughly perpendicular (90 ± 20°) to the high-gain axis of the film. The master tool, photocurable resin composition and PET film were then passed through a heated nip roll at 60° C., which applied sufficient pressure to completely fill the master tool with the resin while removing entrapped air. The filled master tool was then exposed twice to UV radiation from a "D-tube" at a line spe...

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Abstract

The invention provides a brightening film and a preparation method thereof. The brightening film comprises a base material, a light condensing layer and a refraction layer. The light condensing layer is arranged on the upper surface of the base material and composed of a plurality of light condensing structures. Each light condensing structure comprises a bottom face making contact with the upper surface of the base material. The upper surface of the light condensing layer is of a concave-convex structure. The refraction layer is arranged on the upper surface of the light condensing layer. A concave-convex structure matched with the concave-convex structure of the upper surface of the light condensing layer is arranged on the upper surface of the refraction layer. The refraction layer is prepared from an inorganic nanometer particle composition and volatile solvent. The inorganic nanometer particle composition is prepared from inorganic nanometer particles, first attenuation monomer, first photoinitiator and first surface auxiliaries. In the brightening film, an inorganic nanometer particle layer is attached to the upper surface of the light condensing layer independently to be used as the refraction layer, the phenomenon that because inorganic nanometer particles are added to a light-cured resin composition, components are incompatible can be avoided, and the brightening film can have a high refractive index and brightness gain.

Description

technical field [0001] The invention relates to the field of optical films, in particular to a brightness enhancing film and a preparation method thereof. Background technique [0002] Brightness enhancing films are used in many electronic products to increase the brightness of backlit flat panel displays such as liquid crystal displays (LCDs), including electroluminescent panels, laptop computers, word processors, desktop monitors, televisions, video cameras, and displays in cars and airplanes. Improvements in brightness allow illuminated displays to use less energy and enable electronics to operate more efficiently, resulting in less energy consumption, lower thermal load on components, and longer product life. [0003] Brightness enhancement film is a film with a series of regular parallel prisms on the surface of the film. It uses prisms to convert side light into front light and collect reflected light to improve brightness. In addition to the above physical structure...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D4/02C09D7/12
CPCC09D7/62C08J7/04C09D4/00C08J2367/02C08F222/1025C08F222/102C08F220/32C08F220/34
Inventor 廉正丁清华陈明源
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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