公开(公告)号：US20230407026A1

公开(公告)日：2023-12-21

申请号：US18255733

申请日：2021-01-15

Applicant: LG CHEM, LTD.

Inventor： Hanna LEE ,  Inkyu LEE ,  Yeongrae CHANG ,  Jin Young PARK ,  Yongjoon HEO

IPC: C08J7/04 ,  B32B27/36 ,  B32B17/10 ,  B32B27/08 ,  C09D135/02 ,  C09D7/61

CPC classification number: C08J7/042 ,  B32B27/36 ,  B32B17/10 ,  B32B27/08 ,  C09D135/02 ,  C09D7/61 ,  B32B2307/7376 ,  B32B2255/28 ,  B32B2457/20 ,  B32B2255/26 ,  B32B2307/536 ,  B32B2307/546 ,  B32B2307/584 ,  B32B2307/414 ,  B32B2255/10 ,  C08J2435/02 ,  C08J2367/02

Abstract: The present disclosure relates to a protecting film for a cover window of a flexible display device in which a first hard coating layer containing 3 parts by weight or less of inorganic particles based on 100 parts by weight of a binder resin; a second hard coating layer containing 10 to 45 parts by weight of inorganic particles based on 100 parts by weight of a binder resin; and a light-transmitting substrate are sequentially laminated, wherein the first hard coating layer and the second hard coating layer have a specific thickness ratio, a cover window and a display device including the same.

公开(公告)号：US20220171099A1

公开(公告)日：2022-06-02

申请号：US17441095

申请日：2020-05-15

Applicant: LG CHEM, LTD.

Inventor： Jin Young PARK ,  Hanna LEE ,  Kyung Moon KO ,  Yongjoon HEO ,  Yeongrae CHANG ,  Jong Soo DO

IPC: G02B1/14 ,  G09F9/30 ,  G02B1/04 ,  C08J7/046

Abstract: The present disclosure relates to a cover window for a flexible display device comprising: a light-transmitting substrate; and a first hard coating layer and a second hard coating layer which are formed on both sides of the light-transmitting substrate, respectively, wherein each of the first hard coating layer and the second hard coating layer has IR spectra in which a ratio of the amide C═O peak to the ester C═O peak is in a predetermined range, and a flexible display device including the cover window for a flexible display device.

公开(公告)号：US20190317404A1

公开(公告)日：2019-10-17

申请号：US16343153

申请日：2018-09-11

Applicant: LG CHEM, LTD.

Inventor： Seok Hoon JANG ,  Heon KIM ,  Yongjoon HEO ,  Se Hyun KWON ,  Yeong Rae CHANG

IPC: G03F7/075 ,  C08F2/50 ,  C08K5/541 ,  C08L33/06 ,  C08L43/04 ,  G03F7/00 ,  G03F7/004 ,  G03F7/033 ,  G03H1/02

Abstract: A photopolymer composition comprising a polymer matrix or a precursor thereof including a reaction product between (i) a (meth)acrylate-based (co)polymer in which a silane-based functional group is located in a branched chain and an equivalent weight of the silane-based functional group is 300 g/eq to 2000 g/eq, and (ii) a linear silane crosslinking agent; a photoreactive monomer; and a photoinitiator, a hologram recording medium using the same, an optical element using the hologram recording medium, and a holographic recording method. The photopolymer composition can more easily provide a photopolymer layer having improved durability against temperature and humidity while having a large refractive index modulation value.

公开(公告)号：US20210230449A1

公开(公告)日：2021-07-29

申请号：US15734971

申请日：2019-10-25

Applicant: LG CHEM, LTD.

Inventor： Jin Young PARK ,  Bi Oh RYU ,  Young Ji TAE ,  Youngseok PARK ,  Yongjoon HEO ,  Yeongrae CHANG

IPC: C09D177/06 ,  C09D179/08 ,  C08F293/00 ,  H01L51/00 ,  H01L51/52

Abstract: The present disclosure relates to a cover window for a flexible display device including a polymer substrate including a polyamide resin; and a hard coating layer formed on at least one surface of the polymer substrate, wherein a yellow index of the polymer substrate measured in accordance with STM E 313 is 4.00 or less, and an elastic modulus of the polymer substrate measured at a strain rate of 12.5 mm/min in accordance with ISO 527-3 is 4 to 9 GPa.

公开(公告)号：US20210199856A1

公开(公告)日：2021-07-01

申请号：US17269956

申请日：2020-05-15

Applicant: LG CHEM, LTD.

Inventor： Jin Young PARK ,  Yongjoon HEO ,  Yeongrae CHANG

IPC: G02B1/14

Abstract: The present disclosure provides a cover window for a flexible display device comprising a laminate including a light-transmitting substrate or polymer substrate; and a first hard coating layer and a second hard coating layer each formed on both surfaces of the light-transmitting substrate or the polymer substrate, wherein a ratio of a modulus of the first hard coating layer to the total modulus of the laminate is 1.5 to 2.0, and wherein a surface pencil hardness measured from the first hard coating layer side is 5H or more based on 750 g, and a flexible display device comprising the cover window.

公开(公告)号：US20210240226A1

公开(公告)日：2021-08-05

申请号：US15734968

申请日：2019-10-25

Applicant: LG CHEM, LTD.

Inventor： Jin Young PARK ,  Yunah YU ,  Duk Hun JANG ,  Yongjoon HEO ,  Yeongrae CHANG

IPC: G06F1/16 ,  G02B1/14 ,  G02B1/04 ,  C08G73/14 ,  C08L79/08

Abstract: The present disclosure relates to a cover window for a flexible display device and a flexible display device including the cover window, wherein the cover window includes a polymer substrate including a polyamideimide block copolymer; and a hard coating layer formed on at least one surface of the polymer substrate and having a pencil hardness of 5H or more under a load of 750 g, and no crack occurs when wound on a mandrel having a diameter of 3 mm.

公开(公告)号：US20200255623A1

公开(公告)日：2020-08-13

申请号：US16756072

申请日：2018-10-16

Applicant: LG CHEM, LTD.

Inventor： Seok Hoon JANG ,  Heon KIM ,  Boo Kyung KIM ,  Yeong Rae CHANG ,  Yongjoon HEO ,  Se Hyun KWON

IPC: C08K5/02 ,  C08G18/79 ,  C08G18/78 ,  C08G18/32 ,  G11B7/245 ,  G11B7/0065 ,  C08G18/08

Abstract: A photopolymerizable composition including: a polymer matrix or a precursor thereof containing a reaction product of an acrylate-based polyol and a compound containing at least one isocyanate group; a photoreactive monomer; and a non-reactive fluoro compound and a photoinitiator; a hologram recording medium produced from the composition; an optical element including the hologram recording medium; and a method of recording a hologram using the photopolymerizable composition.