Light diffusion film, and polarizing plate provided with light diffusion film

A light-diffusing, light-diffusing layer technology, applied in the direction of optics, polarizing elements, optical elements, etc., can solve the problems of difficulty in combining processability and other characteristics, difficulty in stable production, fracture, etc., and achieve excellent processability and optical characteristics Effect

Pending Publication Date: 2022-06-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For light-diffusing films, excellent optical characteristics and processability, and durability (especially humidity durability) of optical laminates equipped with the light-diffusing film are sometimes required, but in light-diffusing films that are directly bonded and used, it is difficult

Method used

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  • Light diffusion film, and polarizing plate provided with light diffusion film
  • Light diffusion film, and polarizing plate provided with light diffusion film
  • Light diffusion film, and polarizing plate provided with light diffusion film

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0133]

[0134] The methacrylic resin (Cola-Based Co., Ltd., product name "PARAPET HR-S") is put into a single screw extruder, and while melting and extruding at 260 ° C, the embossing roller is used to give a concave and convex shape to a surface, and the enrichment layer (thickness: 50 μm, convex height: 10 μm, cell size: 15000 μm) is obtained 2 )。

[0135] The non-concave shape of the fusing layer is coated with a mixture of 10 parts of silica particles with an average particle size of 10 μm in an acrylic UV curing resin to obtain a mixture. The coating layer is irradiated with ultraviolet rays and the ultraviolet curing resin is cured to form a light diffusion layer, and a light diffusion film is obtained.

[0136] The resulting light diffusion film is provided for the above evaluation (1) ~ (3). The results are shown in Table 1.

Example Embodiment

[0137]

[0138] As a photodiffusion layer of silica particles, using a volume average particle size of 6 μm silica particles, in addition to the same as Example 1 to obtain a light diffusion film.

[0139] The resulting light diffusion film is provided for the above evaluation (1) ~ (3). The results are shown in Table 1.

Example Embodiment

[0140]

[0141] As a photodiffusion layer of silica particles, using a volume average particle size of 2 μm silica particles, in addition to the same as Example 1 to obtain a light diffusion film.

[0142] The resulting light diffusion film is provided for the above evaluation (1) ~ (3). The results are shown in Table 1.

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Abstract

Provided is a light diffusion film capable of contributing to the durability (in particular, humidification durability) of an optical laminate when the light diffusion film is combined with another film to constitute the optical laminate. This light diffusion film is provided with a shaped layer and a light diffusion layer disposed on one surface of the shaped layer, the shaped layer including a base material part and an uneven part disposed on one surface of the base material part, and the light diffusion layer being disposed on the base material part side of the shaped layer.

Description

Technical field [0001] The present invention relates to a light-diffusing film, and a polarizer having a light-diffusing film. Background [0002] In recent years, the expectation of thinning and design improvement (e.g., narrow border) of image display devices (e.g., liquid crystal display devices, organic EL display devices) is very strong. Along with this, expectations for the integration of optical components and / or optical films for image display devices and / or the integration of functions are also increasing. As an example of such integration or integration of functions, a scheme is proposed to directly adhere to the light diffusion film such as a specified optical component to impart a light diffusion function. For light-diffusing films, excellent optical properties and processability are sometimes required, as well as the durability of the optical lamination with the light-diffusion film (especially humidification durability), but in the direct bonding and use of light...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02B5/30G02F1/1335
CPCG02B5/0242G02B5/3041G02F1/133528G02B5/30B32B7/023B32B27/18G02B5/02B32B7/022B32B3/30G02B5/0215
Inventor 吉川贵博三田聪司村上夏纪
Owner NITTO DENKO CORP
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