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Light diffusion film, light diffusion film production method, optical member, display panel for image display device, and image display device

A technology of image display device and manufacturing method, which is applied in the direction of optical elements, optics, identification devices, etc., and can solve the problems such as easy decrease of light transmittance

Pending Publication Date: 2021-11-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In light-diffusing films, there is a problem that light transmittance tends to decrease when trying to improve light-diffusing properties

Method used

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  • Light diffusion film, light diffusion film production method, optical member, display panel for image display device, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149]As a binder resin, 60 parts by weight of pentaerythritol triacrylate (PETA; manufactured by Osaka Organic Chemicals Co., Ltd., trade name "VISCOAT #300") and urethane acrylate prepolymer (manufactured by Shin-Nakamura Chemical Industry Co., Ltd. , trade name "UA-53H-80BK") 40 parts by weight, silicone particles (manufactured by Momentive Performance Materials Japan LLC, trade name "Tospearl 130", weight average particle diameter: 3 μm, |D90-D50|: 2.5 μm) 4 parts by weight , 2.5 parts by weight of synthetic montmorillonite (manufactured by KUNIMINE INDUSTRIES CO., LTD., trade name "Sumecton SAN") as an organoclay, 5 parts by weight of a photopolymerization initiator (manufactured by BASF Corporation, trade name "IRGACURE 907"), and Leveling agent (manufactured by DIC Corporation, trade name "PC4100", solid content 10%) 1.0 parts by weight was mixed with toluene / cyclopentanone (CPN) mixed solvent (weight ratio toluene / cyclopentanone=70 / 30) It diluted and prepared the compo...

Embodiment 2

[0152] Except having formed the light-diffusion layer so that thickness might become 6.3 micrometers, it carried out similarly to Example 1, and obtained the light-diffusion film.

Embodiment 3

[0154] Except having formed the light-diffusion layer so that thickness might become 6.9 micrometers, it carried out similarly to Example 1, and obtained the light-diffusion film.

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Abstract

Provided is a light diffusion film which is capable of offering favorable light diffusion properties and favorable light transmittance. This light diffusion film (10) has a light diffusion layer (B) (12) laminated at least on one side of a transparent substrate (A) (11), and is characterized in that protrusions and recesses are formed on the outermost surface in the light diffusion film on the light diffusion layer (B) (12) side, and the profile of the protrusions and recesses satisfies numerical formulas (1) and (2). Numerical formula (1): 0.110<=Sm. Numerical formula (2): Rsk<=0.200. In numerical formula (1), Sm represents a mean distance (mm) between protrusions and recesses in the protrusion-recess profile as measured in accordance with JIS B0601 (1994). In numerical formula (2), Rsk represents the skewness of the protrusion-recess profile as measured in accordance with JIS B0601 (1994).

Description

technical field [0001] The present invention relates to a light-diffusing film, a method for producing the light-diffusing film, an optical member, a display panel for an image display device, and an image display device. Background technique [0002] In an image display device or the like using a backlight, a light-diffusing film may be used in order to make the light quantity of the entire screen uniform and to reduce display unevenness (Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. H10-096922 Contents of the invention [0006] The problem to be solved by the invention [0007] In a light-diffusing film, there is a problem that light transmittance tends to decrease when light diffusivity is improved. [0008] Therefore, an object of the present invention is to provide a light-diffusing film, a method for producing the light-diffusing film, an optical member, a display ...

Claims

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Application Information

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IPC IPC(8): G02B5/02G09F9/00B32B7/023B32B3/30C08J7/04
CPCG09F9/00C08J7/04B32B7/023B32B3/30G02B5/02G02B5/0221G02B5/0242G02B5/0268G02B5/0278G02B1/04G02F1/133504
Inventor 茂手木佑辅足立贵之济木雄二
Owner NITTO DENKO CORP
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