公开(公告)号：US10093857B2

公开(公告)日：2018-10-09

申请号：US15027646

申请日：2014-03-27

Applicant: DIC Corporation

Inventor： Shinichi Hirata ,  Hyobok Cha ,  Naomi Hatano ,  Tomoaki Hara ,  Yasuo Umezu

IPC: G02F1/1333 ,  C09K19/32 ,  C09K19/12 ,  C09K19/20 ,  C09K19/30 ,  C09K19/02 ,  C09K19/04

Abstract: There is provided a liquid crystal composition having the following properties without reductions in refractive index anisotropy (Δn) and nematic phase-isotropic liquid phase transition temperature (Tni): sufficiently small viscosity (η), sufficiently small rotational viscosity (γ1), a large elastic constant (K33), and negative dielectric anisotropy (Δε) with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type in which such a liquid crystal composition is used and which has a high response speed and excellent display quality with defective display being eliminated or reduced. The liquid crystal display device using the liquid crystal composition of the present invention is useful as an active-matrix liquid crystal display device and can be used in liquid crystal display devices of, for instance, a VA mode and PSVA mode.

公开(公告)号：US20160319195A1

公开(公告)日：2016-11-03

申请号：US15105807

申请日：2014-12-19

Applicant: DIC CORPORATION

Inventor： Go Sudo ,  Yasuo Umezu

IPC: C09K19/54 ,  G02F1/1368 ,  G02F1/1343 ,  C09K19/30 ,  C09K19/32

CPC classification number: C09K19/54 ,  C09K19/20 ,  C09K19/3066 ,  C09K19/322 ,  C09K2019/0448 ,  C09K2019/0466 ,  C09K2019/122 ,  C09K2019/3004 ,  C09K2019/301 ,  C09K2019/3016 ,  C09K2019/3019 ,  C09K2019/3078 ,  G02F1/13439 ,  G02F1/1368 ,  G02F2201/123

Abstract: The present invention relates to a liquid crystal composition, which is a liquid crystal composition containing a compound represented by General Formula (II-1) as an anti-oxidizing agent for a liquid crystal composition containing the compound represented by General Formula (II-1) and also as a first component, and a compound represented by General Formula (K) as a second component. The compound represented by General Formula (II-1) enables obtainment of a working effect of the anti-oxidizing agent, and therefore it allows provision of a liquid crystal composition containing the anti-oxidizing agent which has improved reliability like low temperature stability, while the high dielectric anisotropy is maintained.

Abstract translation: 本发明涉及一种液晶组合物，它是含有通式（II-1）表示的化合物作为含有通式（II-1）表示的化合物的液晶组合物的抗氧化剂的液晶组合物 ）以及作为第一成分的通式（K）表示的化合物作为第二成分。 由通式（II-1）表示的化合物能够获得抗氧化剂的作用效果，因此可以提供含有抗氧化剂的液晶组合物，其具有改善的可靠性，如低温稳定性，同时 维持高的介电各向异性。

公开(公告)号：US20240228878A1

公开(公告)日：2024-07-11

申请号：US18286845

申请日：2022-02-17

Applicant: DIC Corporation

Inventor： Shinichi Hirata ,  Mika Takasaki ,  Masanao Hayashi ,  Noriyuki Sugiyama ,  Yasuo Umezu

IPC: C09K19/32 ,  C07C331/28 ,  C09K19/04 ,  C09K19/30 ,  G02F1/29 ,  H01Q1/36 ,  H01Q3/46

CPC classification number: C09K19/321 ,  C07C331/28 ,  C09K19/3001 ,  H01Q1/36 ,  H01Q3/46 ,  C07C2601/14 ,  C09K2019/0448 ,  C09K2019/325 ,  G02F1/29

Abstract: It is an object of the present invention to provide a compound that can provide a liquid crystal composition with a high Tni, a high Δn, a low Vth, a high Δεr, a low tan δiso, and high storage stability at low temperatures, a liquid crystal composition, as well as a liquid crystal display element, a sensor, a liquid crystal lens, optical communication equipment, and an antenna each using this. Specifically disclosed are a compound represented by the general formula (i) having an ethynylene group (—C≡C—) and an isothiocyanate group (—NCS) and a liquid crystal composition containing one or two or more of the compounds.

公开(公告)号：US20210366997A1

公开(公告)日：2021-11-25

申请号：US17331054

申请日：2021-05-26

Applicant: DIC Corporation

Inventor： Yasuo Umezu ,  Hidehiko Yamaguchi ,  Yoshio Aoki ,  Shinji Ogawa

IPC: H01L27/32 ,  H01L51/50 ,  H01L51/52

Abstract: It is an object of the present invention to provide an image display apparatus capable of inhibiting or preventing the deterioration of a light conversion layer while high luminous efficiency and high color reproducibility are achieved. The present invention provides a light-emitting device including a pair of electrodes, an electroluminescent layer disposed between a first electrode and a second electrode, a light conversion layer including multiple pixels and converting light that is emitted from the electroluminescent layer and that has a blue emission spectrum into light having a different wavelength. The light conversion layer includes pixels of three primary colors of red (R), green (G), and blue (B) and contains a light-emitting nanocrystal having an emission spectrum in any of red (R), green (G), and blue (B) when light from the electroluminescent layer is incident on at least one of the three primary colors.

公开(公告)号：US10947403B2

公开(公告)日：2021-03-16

申请号：US16474357

申请日：2017-12-21

Applicant: DIC Corporation

Inventor： Takeshi Isonaka ,  Yasuo Umezu ,  Hidehiko Yamaguchi ,  Yoshio Aoki ,  Hirotomo Sasaki ,  Sunao Yoshihara ,  Takayuki Miki ,  Aya Ishizuka ,  Takeo Kizaki

IPC: B41M5/00 ,  C09K19/00 ,  C09D11/38 ,  B41J2/21 ,  C09D11/40 ,  G02F1/1335 ,  G02B5/20 ,  B82Y20/00

Abstract: A dispersion contains, as essential ingredients, light-emitting nanocrystals, a polymeric dispersant having an amine value of 5 mg/KOH g or more, and a stimulation-responsive curable material that cures in response to an external stimulus.

公开(公告)号：US10301546B2

公开(公告)日：2019-05-28

申请号：US15765790

申请日：2016-10-20

Applicant: DIC Corporation

Inventor： Tsuyoshi Sasaki ,  Hidenari Akiyama ,  Yasuo Umezu ,  Kazunori Maruyama ,  Haruki Ohishi ,  Shinji Ogawa ,  Yoshinori Iwashita

IPC: C09K19/58 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/13 ,  G02F1/1368 ,  G02F1/139 ,  C09K19/02

Abstract: The liquid crystal display element uses a liquid crystal composition which has a negative value of dielectric anisotropy (Δε) and is designed to improve light transmittance adjusting an elastic constant, and a liquid crystal display including the liquid crystal display element. The liquid crystal display element uses a liquid crystal composition having a dielectric anisotropy (Δε) of less than −1.5, in which a value of Γ of the liquid crystal composition is 0.3 or less, and the value of Γ is obtained from Equation (2) using measured values of a splay elastic constant (K11) and a bend elastic constant (K33) of the liquid crystal composition and a twist elastic constant (K22) value obtained from Equation (1) using measured values of a threshold voltage (Vth), a bend elastic constant (K33), vacuum permittivity (ε0), a cell gap (d), and a helical pitch (P0). V th = π ⁢ { 1 - 4 ⁢ ( K 22 K 33 ) 2 ⁢ ( d P 0 ) 2 } ⁢ K 33  ɛ 0 ⁢ Δɛ  ( 1 ) Γ = K 22 K 11 + K 33 ( 2 )

公开(公告)号：US20180282626A1

公开(公告)日：2018-10-04

申请号：US15765790

申请日：2016-10-20

Applicant: DIC Corporation

Inventor： Tsuyoshi Sasaki ,  Hidenari Akiyama ,  Yasuo Umezu ,  Kazunori Maruyama ,  Haruki Ohishi ,  Shinji Ogawa ,  Yoshinori Iwashita

IPC: C09K19/58 ,  G02F1/1343 ,  G02F1/1368 ,  G02F1/1362 ,  G02F1/1337

CPC classification number: C09K19/586 ,  C09K19/02 ,  C09K19/588 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/1368 ,  G02F1/139 ,  G02F2001/133738 ,  G02F2201/121 ,  G02F2201/123

Abstract: The liquid crystal display element uses a liquid crystal composition which has a negative value of dielectric anisotropy (Δε) and is designed to improve light transmittance adjusting an elastic constant, and a liquid crystal display including the liquid crystal display element. The liquid crystal display element uses a liquid crystal composition having a dielectric anistropy (Δε) of less than −1.5, in which a value of Γ of the liquid crystal composition is 0.3 or less, and the value of Γ is obtained from Equation (2) using measured values of a splay elastic constant (K11) and a bend elastic constant (K33) of the liquid crystal composition and a twist elastic constant (K22) value obtained from Equation (1) using measured values of a threshold voltage (Vth), a bend elastic constant (K33), vacuum permittivity (ε0), a cell gap (d), and a helical pitch (P0). V th = π  { 1 - 4  ( K 22 K 33 ) 2  ( d P 0 ) 2 }  K 33  ɛ 0  Δɛ  ( 1 ) Γ = K 22 K 11 + K 33 ( 2 )

公开(公告)号：US20180282623A1

公开(公告)日：2018-10-04

申请号：US15765796

申请日：2016-11-01

Applicant: DIC Corporation

Inventor： Tsuyoshi Sasaki ,  Hidenari Akiyama ,  Yasuo Umezu ,  Kazunori Maruyama ,  Haruki Ohishi ,  Shinji Ogawa ,  Yoshinori Iwashita

IPC: C09K19/30 ,  C09K19/58 ,  C09K19/54 ,  G02F1/137

Abstract: The liquid crystal composition is designed to improve light transmittance using an elastic constant and has a negative value of dielectric anisotropy (Δε), a liquid crystal display element using the liquid crystal composition, and the liquid crystal display. The liquid crystal composition has a negative value of dielectric anisotropy (Δε) and a value of Γ of 0.28 or less. The value of Γ is obtained from Equation (2) using a twist elastic constant (K22) value obtained from Equation (1) using measured values of dielectric anisotropy (Δε), a threshold voltage (Vth), a bend elastic constant (K33), vacuum permittivity (ε0), a cell gap (d), and a helical pitch (P0) and measured values of a splay elastic constant (K11) and the bend elastic constant (K33). V th = π  { 1 - 4  ( K 22 K 33  ) 2  ( d P 0 ) 2 }  K 33  ɛ 0  Δ   ɛ  ( 1 ) Γ = K 22 K 11 + K 33 ( 2 )