公开(公告)号：US12196996B2

公开(公告)日：2025-01-14

申请号：US17253523

申请日：2019-04-17

Applicant: Samsung SDI Co., Ltd.

Inventor： Jun Mo Koo ,  Jung Hun You ,  Sang Hum Lee ,  Dong Yoon Shin

IPC: B32B23/08 ,  B32B27/08 ,  B32B27/36 ,  G02B5/22 ,  G02B5/30

Abstract: Provided are an optical film, a polarizing plate including same, and a display device including same, the optical film comprising a first layer and second and third layers sequentially formed on the first layer, wherein the first layer and the third layer are each formed directly on the second layer, the first layer is a reverse wavelength dispersive negative A layer, the third layer is a positive C layer, and the ratio of the thickness of the second layer to the thickness of the third layer (the thickness of the second layer/the thickness of the third layer) is about 0.2 to about 2.

公开(公告)号：US11809044B2

公开(公告)日：2023-11-07

申请号：US16756438

申请日：2018-09-11

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jin Hee Choi ,  Jin Sook Kim ,  Jung Hun You ,  Sun Hong Park ,  Sang Hum Lee

IPC: G02F1/13363 ,  G02F1/1337 ,  G02F1/1335

CPC classification number: G02F1/13363 ,  G02F1/1337 ,  G02F1/133528 ,  B32B2457/20 ,  B32B2457/202 ,  C09K2323/03 ,  C09K2323/031 ,  C09K2323/035 ,  G02F1/133742 ,  G02F2201/086 ,  G02F2202/40

Abstract: A liquid crystal retardation film, a polarizing plate for light emitting displays including the same, and a light emitting display including the same are provided. The liquid crystal retardation film includes: a first retardation layer having no alignment layer, a UV absorbent primer layer, and a second retardation layer sequentially formed in the stated order, wherein each of the first retardation layer and the second retardation layer may be a liquid crystal layer.

公开(公告)号：US11681085B2

公开(公告)日：2023-06-20

申请号：US16941252

申请日：2020-07-28

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jun Mo Koo ,  Bong Choon Kim ,  Dong Yoon Shin ,  Jung Hun You ,  Sang Hum Lee

IPC: G02B5/30

CPC classification number: G02B5/3083 ,  G02B5/3041

Abstract: A polarizing plate and an optical display apparatus are provided. A polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 180 nm to about 220 nm at a wavelength of 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation Re of about 70 nm to about 120 nm at a wavelength of 550 nm, and a ratio of out-of-plane retardation of the second retardation layer at a wavelength of 550 nm to thickness thereof is about −33 nm/μm to about −15 nm/μm.

公开(公告)号：US12269250B2

公开(公告)日：2025-04-08

申请号：US17593905

申请日：2020-06-10

Applicant: Samsung SDI Co., Ltd.

Inventor： Yoon Jung Kim ,  Sang Hum Lee ,  Ri Ra Jung ,  Yeon Ju Jung

IPC: B32B7/023 ,  B32B27/32 ,  G02B5/30 ,  G02F1/13363

Abstract: Provided are a polarizing plate and an optical display device comprising same, the polarizing plate comprising: a polarizer; and a first phase difference layer, a second phase difference layer and a third phase difference layer which are sequentially stacked on the lower surface of the polarizer. The first phase difference layer comprises a positive C phase difference layer. The second phase difference layer has positive wavelength dispersibility and an in-plane phase difference of approximately 200 nm to 280 nm in a wavelength of 550 nm. The third phase difference layer has positive wavelength dispersibility and an in-plane phase difference of approximately 80 nm to 145 nm in a wavelength of 550 nm. When the absorption axis of the polarizer is 0°, the angle formed by the slow axis of the second phase difference layer is approximately +14° to +24° or approximately −24° to −14°, and the angle formed by the slow axis of the third phase difference layer is approximately +79° to +89° or approximately −89° to −79°.

公开(公告)号：US12253705B2

公开(公告)日：2025-03-18

申请号：US17381550

申请日：2021-07-21

Applicant: Samsung SDI Co., Ltd.

Inventor： Bong Choon Kim ,  Jun Mo Koo ,  Dong Yoon Shin ,  Jung Hun You ,  Sang Hum Lee

IPC: G02B5/30 ,  G02B1/04 ,  G02F1/13363

Abstract: A polarizing plate and an optical display apparatus including the same are provided. A polarizing plate includes a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has an in-plane retardation of about 180 nm to about 220 nm at a wavelength of about 550 nm; and the second retardation layer has an in-plane retardation of about 80 nm to about 100 nm at a wavelength of about 550 nm.

公开(公告)号：US12158600B2

公开(公告)日：2024-12-03

申请号：US18330091

申请日：2023-06-06

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jun Mo Koo ,  Jung Hun You ,  Sang Hum Lee ,  Bong Choon Kim ,  Yoon Jung Kim ,  Ri Ra Jung ,  Kyu Sik Kim ,  Kwang Ho Shin ,  Han Mam Jeong ,  Eun Su Park

IPC: G02B5/30 ,  G02F1/1335

Abstract: A polarizing plate and an optical display apparatus including the same are provided. The polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer. The first retardation layer has an in-plane retardation (Re) of 200 nm to 250 nm at a wavelength of 550 nm; the second retardation layer has an in-plane retardation (Re) of 80 nm to 140 nm at a wavelength of 550 nm; and the polarizing plate has a total transmittance difference of 2% or more between total transmittance at a wavelength of 450 nm and total transmittance at a wavelength of 420 nm.

公开(公告)号：US12271016B2

公开(公告)日：2025-04-08

申请号：US18312960

申请日：2023-05-05

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jun Mo Koo ,  Bong Choon Kim ,  Dong Yoon Shin ,  Jung Hun You ,  Sang Hum Lee

IPC: G02B5/30

Abstract: A polarizing plate and an optical display apparatus are provided. A polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 180 nm to about 220 nm at a wavelength of 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation Re of about 70 nm to about 120 nm at a wavelength of 550 nm, and a ratio of out-of-plane retardation of the second retardation layer at a wavelength of 550 nm to thickness thereof is about −33 nm/μm to about −15 nm/μm.

公开(公告)号：US11880055B2

公开(公告)日：2024-01-23

申请号：US17630469

申请日：2020-07-17

Applicant: Samsung SDI Co., Ltd.

Inventor： Jung Hun You ,  Bong Choon Kim ,  Sang Hum Lee ,  Jun Mo Koo ,  Dong Yoon Shin

IPC: G02B5/30 ,  G02B1/14 ,  G02B5/22 ,  G02F1/1335

CPC classification number: G02B5/3033 ,  G02B1/14 ,  G02B5/223 ,  G02F1/133509 ,  G02F1/133528

Abstract: A polarizing plate and a display apparatus including the same. The polarizing plate includes: a polarizer and a protective film stacked at least on one surface of the polarizer, wherein the polarizing plate includes at least a depolarization region in an in-plane direction thereof, and the depolarization region has a maximum absorbance of 0.5 to 1.5 in the wavelength range of 380 nm to 420 nm and a light transmittance ratio (ratio of light transmittance at a wavelength of 590 nm to light transmittance at a wavelength of 400 nm) of 1 to 2.

公开(公告)号：US11726248B2

公开(公告)日：2023-08-15

申请号：US17831282

申请日：2022-06-02

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jun Mo Koo ,  Jung Hun You ,  Sang Hum Lee ,  Bong Choon Kim ,  Yoon Jung Kim ,  Ri Ra Jung ,  Kyu Sik Kim ,  Kwang Ho Shin ,  Han Mam Jeong ,  Eun Su Park

IPC: G02F1/1335 ,  G02B5/30

CPC classification number: G02B5/3083 ,  G02F1/133528

Abstract: A polarizing plate and an optical display apparatus including the same are provided. The polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer. The first retardation layer has an in-plane retardation (Re) of 200 nm to 250 nm at a wavelength of 550 nm; the second retardation layer has an in-plane retardation (Re) of 80 nm to 140 nm at a wavelength of 550 nm; and the polarizing plate has a total transmittance difference of 2% or more between total transmittance at a wavelength of 450 nm and total transmittance at a wavelength of 420 nm.

公开(公告)号：US12210177B2

公开(公告)日：2025-01-28

申请号：US17632213

申请日：2020-08-07

Applicant: Samsung SDI Co., Ltd.

Inventor： Jun Mo Koo ,  Bong Choon Kim ,  Dong Yoon Shin ,  Jung Hun You ,  Sang Hum Lee

IPC: G02B5/30 ,  G02F1/1335

Abstract: Provided is a polarizing plate and an optical display device comprising same, the polarizing plate comprising: a polarizer; and a stack body of a first phase difference layer and a second phase difference layer stacked on a lower surface of the polarizer, wherein the first phase difference layer satisfies Equation 1, the second phase difference layer satisfies Equation 2, the sum of an in-plane phase difference at a wavelength of 550 nm between the first phase difference layer and the second phase difference layer is about 100 nm to about 110 nm, the sum of a thickness direction phase difference at a wavelength of 550 nm between the first phase difference layer and the second phase difference layer is about −30 nm to about +10 nm, and the second phase difference layer comprises a fluorine-based phase difference layer.