Unlock instant, AI-driven research and patent intelligence for your innovation.

Light-diffusing film, manufacturing method therefor, light-diffusing polarizing plate, and liquid-crystal display device

A technology of light diffusion film and manufacturing method, which is applied in the direction of polarizing elements, lighting devices, components of lighting devices, etc., which can solve the problems of whitening of the screen, reduction of frontal contrast of displayed images, and inability to obtain wide viewing angles, etc., to achieve light diffusion Excellent anti-whitening effect

Active Publication Date: 2014-05-21
SUMITOMO CHEM CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing light-diffusing film, if sufficient light-diffusing properties are given in order to obtain a wide viewing angle, the transmission sharpness of the displayed image decreases, and the front contrast of the displayed image also decreases. The problem of so-called whitening (Japanese original: 白ちやけ) caused by diffuse reflection on the surface makes the entire screen feel white
Conversely, if sufficient clarity of transmission is to be imparted, the light diffusibility becomes insufficient, and a wide viewing angle cannot be obtained.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light-diffusing film, manufacturing method therefor, light-diffusing polarizing plate, and liquid-crystal display device
  • Light-diffusing film, manufacturing method therefor, light-diffusing polarizing plate, and liquid-crystal display device
  • Light-diffusing film, manufacturing method therefor, light-diffusing polarizing plate, and liquid-crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] (1) Production of mirror metal rollers

[0160] The surface of an iron roll (STKM13A specified by JIS) with a diameter of 200 mm was subjected to industrial chrome plating, and then the surface was mirror-polished to produce a mirror-finished metal roll. The Vickers hardness of the chrome-plated surface of the obtained mirror-finished metal roller was 1,000. In addition, the Vickers hardness was measured according to JIS Z 2244 using an ultrasonic hardness meter MIC10 (manufactured by Krautkramer Co., Ltd.) (the method for measuring the Vickers hardness is the same in the following examples).

[0161] (2) Production of light diffusion film

[0162] Mix 60 weight parts of pentaerythritol triacrylate and polyfunctional urethane acrylate (1,6-hexamethylene diisocyanate and the reaction product of pentaerythritol triacrylate) 40 weight parts in the propylene glycol monomethyl ether solution, adjust solid content concentration to be 60% by weight to obtain an ultraviolet c...

Embodiment 2

[0167] In addition to using 10 parts by weight of polystyrene particles with a weight-average particle diameter of 3.0 μm and a standard deviation of 0.39 μm as the first light-transmitting fine particles, and a weight-average particle diameter of 7.2 μm as the second light-transmitting fine particles, the standard A light-diffusing film was produced in the same manner as in Example 1 except for 30 parts by weight of polystyrene-based particles with a deviation of 0.73 μm.

Embodiment 3

[0169] In addition to using 20 parts by weight of polystyrene particles with a weight-average particle diameter of 3.0 μm and a standard deviation of 0.39 μm as the first light-transmitting fine particles, and a weight-average particle diameter of 8.0 μm as the second light-transmitting fine particles, the standard A light-diffusing film was produced in the same manner as in Example 1 except for 20 parts by weight of the polystyrene-based particles whose deviation was 0.672 μm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
particle sizeaaaaaaaaaa
surface roughnessaaaaaaaaaa
Login to View More

Abstract

Provided is a light-diffusing film that is laminated on a substrate film and has a light-diffusing layer in which light-transmitting microparticles are diffused in a light-transmitting resin. Also provided are a method for manufacturing said light-diffusing film and a light-diffusing polarizing plate and liquid-crystal display device using said light-diffusing film. The aforementioned light-transmitting microparticles include first light-transmitting microparticles having a weight-average diameter greater than or equal to 0.5 µm and less than 6 µm, and second light-transmitting microparticles having a weight-average diameter between 6 µm and 15 µm, inclusive. The difference between the weight-average diameter of the first light-transmitting microparticles and that of the second light-transmitting microparticles is at least 2 µm. By weight, the light-transmitting microparticles constitute 22 to 60 parts of the diffusion layer per 100 parts of the light-transmitting resin. The centerline average roughness of the surface of the light-diffusing layer is no greater than 0.2 µm.

Description

technical field [0001] The present invention relates to a light-diffusing film and a manufacturing method thereof. Moreover, this invention relates to the light-diffusing polarizing plate and liquid crystal display device using this light-diffusion film. Background technique [0002] In recent years, applications of liquid crystal display devices to mobile phones, monitors for computers, televisions, liquid crystal projectors, and the like have rapidly developed. The liquid crystal display device generally operates the liquid crystal in display modes such as TN (Twisted Nematic, twisted nematic) mode, VA (Vertical Alignment, vertical alignment) mode, and IPS (In-Plane Switching, in-plane switching) mode. Light is electrically controlled to show the difference between light and dark on the screen, thereby displaying characters and images. [0003] Conventionally, in liquid crystal display devices, it has been pointed out that when the display screen is viewed from an obliqu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02F21S2/00F21V3/04G02B1/11G02B5/30G02F1/1335G02F1/13357F21Y101/02F21Y103/00
CPCG02F1/133504G02B5/0278G02B5/0242
Inventor 羽场康弘金玉馨
Owner SUMITOMO CHEM CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com