Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light guide plate

A technology of light guide plate and acrylic resin, which is applied in the field of light guide plate, can solve the problems of insufficient light transmittance and insufficient operation characteristics of light guide plate, and achieve excellent processability and operation characteristics, excellent light transmittance, and high adhesion Effect

Inactive Publication Date: 2010-07-28
SUMITOMO CHEM CO LTD
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when a film obtained by extrusion molding an acrylic resin is used for a light guide plate, when the shape of the obtained light guide plate is adjusted by pressing, etc., there is a tendency that the light guide plate will be cracked, and the handling of the obtained light guide plate Insufficient characteristics
[0007] On the other hand, when a film obtained by dispersing rubber particles in a methacrylic resin is used for a light guide plate, the processability and handling characteristics by press working etc. are good, but the light transmittance is not sufficient.

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 guide plate
  • Light guide plate
  • Light guide plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8 and comparative example 3

[0123]

[0124] As the resin layer A, resins of the types shown in Table 1 were melt-kneaded with the extruder 1 and supplied to the feed block. On the other hand, as the resin layer B, resins of the types shown in Table 1 were melt-kneaded by the extruder 2 and supplied to the feed block. Coextrusion molding was performed so that the resin layer A supplied from the extruder 1 to the feedblock was an intermediate layer, and the resin layer B supplied from the extruder 2 to the feedblock was both surface layers.

[0125] Then, the molten resin 4 extruded from the die 3 was formed into a film while being sandwiched between the No. 1 roll and the No. 2 roll of the roll configuration shown in Table 1, and a light guide plate having a three-layer structure having the thickness shown in Table 1 was obtained. . In addition, the surface temperature of the No. 1 roll was 130°C, and the surface temperature of the No. 2 roll was 140°C. These temperatures are actual measured values ​​...

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

No PUM Login to View More

Abstract

The invention provides a light guide plate with excellent light transmission, processability and operation characteristic. The light guide plate is formed by an acrylic acid resin layer and polycarbonate resin layers laminated on the two surfaces of the acrylic acid resin layer. Preferably, the acrylic acid resin layer is formed by acrylic acid resin composition and the acrylic acid resin composition comprises 0.001-1 weight part of at least one agent selected from malonic ester type ultraviolet absorber, oxalyl aniline type ultraviolet absorber and acetate type ultraviolet absorber relative to 100 weight parts of acrylic acid resin. Preferably, the polycarbonate resin layer is formed by polycarbonate resin composition and the polycarbonate resin composition comprises 0.01-1 weight part of acrylic resin, relative to 100 weight parts of polycarbonate resin.

Description

technical field [0001] The present invention relates to a light guide plate composed of an acrylic resin layer and a polycarbonate resin layer laminated on both sides thereof. Background technique [0002] Conventionally, methyl methacrylate-based resins excellent in transparency have been frequently used as light guide plates. Methyl methacrylate resin can transmit light from light sources such as cold cathode tubes and LEDs with high transmittance. Therefore, a plate made of methyl methacrylate resin having a thickness of approximately 3 to 5 mm is used as a light guide plate for backlights of notebook personal computers, liquid crystal monitors, and the like. [0003] On the other hand, light guide plates used in mobile phones, portable game machines, etc. have been thinned to a thickness of about 1 to 2 mm, and not only methyl methacrylate resins are used, but also high-strength polycarbonate resins, A resin containing an ethylenically unsaturated monomer unit containi...

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
IPC IPC(8): F21V8/00B32B27/28G02F1/13357
CPCB32B27/08B32B27/308B32B27/365G02B6/0065
Inventor 前川智博
Owner SUMITOMO CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com