Injection-molded product

Patent metadata

Field	Value
Publication number	US-12461390-B2
Application number	US-202017623421-A
Country	US
Kind code	B2
Filing date	Jul 1, 2020
Priority date	Jul 2, 2019
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

An injection-molded product or an eyewear is provided. The injection-molded product or the eyewear may be an optically compensated injection-molded product, which may resolve optical defects such as a rainbow phenomenon occurring in the injection-molded product or the eyewear. The injection-molded product may include an injection-molded body and a retardation film disposed on at least one side of the injection-molded body. The retardation film has an in-plane phase difference of 1,000 nm or more for light having a wavelength of 550 nm, and wherein an angle formed by a slow axis of the retardation film and an injection direction of the injection-molded body is in a range from 0 degree to 80 degrees.

First claim

The invention claimed is:

1 . An injection-molded product, comprising:
an injection-molded body; and a retardation film disposed on at least one side of the injection-molded body, wherein the retardation film has an in-plane phase difference of 1,000 nm or more for light having a wavelength of 550 nm and comprises only one slow axis, and wherein an angle formed by the slow axis of the retardation film and an injection direction of the injection-molded body is in a range from 0 degree to 80 degrees, wherein the injection direction is a direction along which melted plastic material is injected into a mold to form the injection-molded body, and wherein the injection-molded body has an in-plane phase difference in a range of 800 nm to 3,000 nm for light having a wavelength of 550 nm.

2 . The injection-molded product according to according to claim 1 , wherein the injection-molded body is a molded body comprising one or more plastics selected from the group consisting of polyvinyl chloride, polyolefin, polyester, nylon, polyamide, polysulfone, polyetherimide, polyethersulfone, polyphenylene sulfide, polyether ketone, polyether ether ketone, ABS resins, polystyrene, polybutadiene, polyacrylate, polyacrylonitrile, polyacetal, polycarbonate, polyphenylene ether, EVA resins, polyvinyl acetate, liquid crystal polymers, ethylene-tetrafluoroethylene copolymers, polyvinyl fluoride, polyvinylidene fluoride, polyvinylidene chloride and teflon.

3 . The injection-molded product according to claim 1 , wherein the in-plane phase difference of the retardation film is 2,000 nm or more for light having a wavelength of 550 nm.

4 . The injection-molded product according to claim 1 , wherein the in-plane phase difference of the retardation film is 3,000 nm or more for light having a wavelength of 550 nm is 3,000 nm or more.

5 . The injection-molded product according to claim 1 , wherein the retardation film is a polymer film or a liquid crystal film.

6 . The injection-molded product according to claim 1 , wherein the injection-molded body is an eyewear.

7 . An Eyewear, comprising:
an eyewear body comprising a left eye region and a right eye region; and a retardation film disposed on at least one side of the eyewear body, wherein the eyewear body is an injection-molded body, wherein the retardation film has an in-plane phase difference of 1,000 nm or more for light having a wavelength of 550 nm and comprises only one slow axis, wherein an angle formed by a virtual line connecting respective mass centers of the left eye region and the right eye region in the eyewear body and a slow axis of the retardation film is from 10 degrees to 170 degrees, and wherein the eyewear body has an in-plane phase difference in a range of 800 nm to 3,000 nm for light having a wavelength of 550 nm.

8 . The eyewear according to claim 7 , wherein the eyewear body is a molded body comprising one or more plastics selected from the group consisting of polycarbonate and nylon.

9 . The eyewear according to claim 7 , wherein the in-plane phase difference of the retardation film is 2,000 nm or more for light having a wavelength of 550 nm.

10 . The eyewear according to claim 7 , wherein the in-plane phase difference of the retardation film is 3,000 nm or more for light having a wavelength of 550 nm.

11 . The eyewear according to claim 7 , wherein the retardation film is a polymer film or a liquid crystal film.

Assignees

• Lg Chemical Ltd

Inventors

• Lim Eun Jung
• Oh Dong Hyun
• Kim Jin Hong
• Gim Min Jun

Classifications

• G02B5/3016

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02B1/041

  Lenses · CPC title

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title

• B29D11/0073 Primary

  Optical laminates · CPC title

• B29K2995/0018

  having particular optical properties, e.g. fluorescent or phosphorescent · CPC title