公开(公告)号：US11958987B2

公开(公告)日：2024-04-16

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: C08G69/32 ,  B32B27/30 ,  B32B27/34 ,  C08F293/00 ,  C08G69/26 ,  C09D177/06 ,  C09D179/08 ,  H10K50/84 ,  H10K77/10 ,  H10K102/00

CPC classification number: C09D177/06 ,  B32B27/308 ,  B32B27/34 ,  C08F293/00 ,  C08G69/265 ,  C08G69/32 ,  C09D179/08 ,  H10K50/841 ,  H10K77/111 ,  B32B2307/412 ,  B32B2307/51 ,  B32B2307/536 ,  B32B2457/20 ,  H10K2102/311

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：US12072468B2

公开(公告)日：2024-08-27

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 ,  B32B15/088 ,  B32B27/28 ,  C08J7/046 ,  G02B1/04

CPC classification number: G02B1/14 ,  B32B15/088 ,  B32B27/281 ,  C08J7/046 ,  G02B1/04 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2307/412 ,  B32B2307/51 ,  B32B2307/536 ,  B32B2307/546 ,  B32B2307/584 ,  B32B2457/20

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：US11079678B2

公开(公告)日：2021-08-03

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

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：US12140831B2

公开(公告)日：2024-11-12

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: G02F1/1333 ,  C08G73/10 ,  C08G73/14 ,  C08L79/08 ,  G02B1/04 ,  G02B1/14 ,  G06F1/16

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：US12117592B2

公开(公告)日：2024-10-15

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 ,  B32B27/28 ,  B32B27/30 ,  B32B27/34 ,  G02F1/1333

CPC classification number: G02B1/14 ,  B32B27/281 ,  B32B27/308 ,  B32B27/34 ,  B32B2250/24 ,  B32B2250/40 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2255/28 ,  B32B2307/412 ,  B32B2307/51 ,  B32B2307/536 ,  B32B2457/20 ,  G02F1/133305

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：US11292888B2

公开(公告)日：2022-04-05

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: G03H1/02 ,  G03F7/035 ,  G11B7/245 ,  C08G18/79 ,  C08G18/78 ,  C08G18/32 ,  C08G18/08 ,  C08K5/02 ,  G11B7/0065 ,  C08K5/00 ,  G03H1/26

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.