POLYIMIDE-BASED POLYMER FILM, AND SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE, EACH USING SAME

Title:

POLYIMIDE-BASED POLYMER FILM, AND SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE, EACH USING SAME

Document Type and Number:

WIPO Patent Application WO/2023/080369

Kind Code:

A1

Abstract:

The present invention relates to a polyimide-based polymer film, and a substrate for a display device, and an optical device, each using same, the polyimide-based polymer film having a refractive index contrast (Δn), derived by mathematical formula 1, of at most 0.0068, and having a yellow index, at a thickness of 10 μm, of at most 5.5.

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Inventors:

KANG MI EUN (KR)
HONG YE JI (KR)
PARK CHAN HYO (KR)
PARK HANGAH (KR)
LEE MIN WOOK (KR)

Application Number:

PCT/KR2022/007039

Publication Date:

May 11, 2023

Filing Date:

May 17, 2022

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

C08J5/18; C08G73/10; C08K5/521; C08L79/08; G02B1/04

Foreign References:

JPH08143666A	1996-06-04
JP2021152173A	2021-09-30
KR20210026053A	2021-03-10
JP2020012103A	2020-01-23
CN1145917A	1997-03-26
CN112778551A	2021-05-11
KR20210151323A	2021-12-14

Other References:

DATABASE CAPLUS 2012, ANONYMOUS: "Preparation and properties study of mPDA/ODPA-PI film", XP093064921, retrieved from STN Database accession no. 2013:362696
See also references of EP 4201983A4

Attorney, Agent or Firm:

YOU ME PATENT AND LAW FIRM (KR)

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