Patent · US Active

Optical film

US11550179B2 · kind B2 · utility

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0References

9Claims

0Family size

Assignee

SUMITOMO CHEMICAL COMPANY, LIMITED · JP

Inventors

Kazuki Daimatsu · Osaka, JP
Hitoshi Fukui · Hiroshima, JP
Masayoshi Karasawa · Nagano, JP

Key dates

Filing date	Sep 17, 2019
Grant date	Jan 10, 2023
Priority date	—
Expiry date	Apr 9, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/3016
WIPO fieldOptics
WIPO sectorInstruments

Abstract

To provide an optical film having excellent visibility in the wide angle direction. An optical film including at least one resin selected from the group consisting of a polyimide-based resin and a polyamide-based resin, wherein the optical film satisfies Formula (1): 0≤Ts≤0.35 (1) wherein Ts represents a scattered light ratio (%) and is defined as Ts=Td/Tt×100, Td and Tt represent a diffuse light transmittance (%) and a total light transmittance (%), measured in accordance with JIS K-7136, respectively.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.