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Optical layered body, polarizing plate, display panel, and image display device

A technology of optical layers and polarizers, applied in the direction of optics, polarizing elements, optical elements, etc.

Active Publication Date: 2020-08-28
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the existing optical layered body, it is difficult to say that the scratch resistance is sufficient, and an optical layered body with further improved scratch resistance is required.

Method used

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  • Optical layered body, polarizing plate, display panel, and image display device
  • Optical layered body, polarizing plate, display panel, and image display device
  • Optical layered body, polarizing plate, display panel, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0422] Prepare a light-transmitting substrate (thickness 40 μm, triacetyl cellulose resin film, product name: TD40UC, manufactured by Fujifilm Corporation), and apply an anti-glare layer of the composition shown below on one side of the light-transmitting substrate With the composition, a coating film is formed.

[0423] Next, for the formed coating film, dry air at 70° C. was passed through at a flow rate of 0.2 m / s for 15 seconds, and then dried at a flow rate of 10 m / s at 70° C. for 30 seconds to dry the coated film. The solvent in the film is evaporated, and ultraviolet rays are irradiated so that the accumulated light amount becomes 30mJ / cm 2 , the coating film was cured, thereby forming an antiglare layer with a thickness of 5 μm (when cured).

[0424] (composition for antiglare layer)

[0425] 50 parts by mass of 4-functional acrylate monomer (product name: SR295, manufactured by Sartomer Corporation)

[0426] 50 parts by mass of urethane acrylate oligomer (product n...

Embodiment 2

[0443] In the composition for the low-refractive index layer, except that the compounding amount of the solid silica fine particles was 20 parts by mass, the composition for the low-refractive index layer was prepared in the same manner as in Example 1, and the composition for the low-refractive index layer was used. Except for the composition, the optical layered body of Example 2 was produced in the same manner as in Example 1.

Embodiment 3

[0445] In the composition for the low refractive index layer, except that the compounding amount of the solid silica fine particles is 100 parts by mass, the composition for the low refractive index layer is prepared in the same manner as in Example 1, and the composition for the low refractive index layer is used. Except for the composition, the optical layered body of Example 3 was produced in the same manner as in Example 1.

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PUM

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Abstract

The present invention provides an optical layered body which has excellent abrasion resistance while being provided with antireflection performance. The present invention relates to an optical layeredbody in which at least an antiglare layer and a low-refractive-index layer are layered in this order on one surface of a light-transmitting substrate, the optical layered body being characterized inthat the arithmetic average roughness Ra of recesses and projections and the ten-point average roughness Rz of the recesses and projections measured in an arbitrary 5 [mu]m square region on the surface of the low-refractive-index layer are 4 nm or less and 60 nm or less, respectively.

Description

technical field [0001] The present invention relates to an optical layered body, a polarizing plate, a display panel, and an image display device. Background technique [0002] Image display surface in image display devices such as liquid crystal display (LCD), cathode ray tube display (CRT), plasma display (PDP), electroluminescence display (ELD), field emission display (FED), etc. In general, in order to suppress the reflection of the observer and the background of the observer, etc., an anti-glare film having unevenness on the surface or an anti-reflection optical layered body having an anti-reflection layer on the surface is provided. [0003] Such an optical layered body for antireflection suppresses reflection of an image or lowers reflectance by scattering and interference of light. [0004] As one of the optical layered bodies for antireflection, there is known an optical layered body in which an antiglare layer having a concavo-convex shape is formed on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B5/02B32B7/023G02B1/11G02B1/14G02F1/1335
CPCG02B5/3033G02F1/1335G02F1/133502B32B7/023G02B1/11G02B1/14G02B5/02G02B5/30H10K59/50
Inventor 江口淳哉西村雅俊高坂洋介户部伸之鸟本将宏福田贵之葛原满广
Owner DAI NIPPON PRINTING CO LTD