Abstract: The present invention relates to a polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent containing the same, a liquid crystal aligning film formed from the liquid crystal alignment agent, and a liquid crystal display device containing the liquid crystal aligning film.
Type:
Grant
Filed:
May 14, 2018
Date of Patent:
March 29, 2022
Assignee:
LG CHEM, LTD.
Inventors:
Soon Ho Kwon, Jung Ho Jo, Sung Joon Min, Sang Mi Lee, Kichul Koo, Jun Young Yoon, Hyeong Seuk Yun, Yoon Bin Lim, Seongku Kim
Abstract: The present invention relates to a polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent containing the same, a liquid crystal aligning film formed from the liquid crystal alignment agent, and a liquid crystal display device containing the liquid crystal aligning film.
Type:
Grant
Filed:
May 14, 2018
Date of Patent:
March 29, 2022
Assignee:
LG CHEM, LTD.
Inventors:
Soon Ho Kwon, Kichul Koo, Jung Ho Jo, Sung Joon Min, Sang Mi Lee, Jun Young Yoon, Hyeong Seuk Yun, Yoon Bin Lim
Abstract: A transmittance-variable film having a double-cell structure or a single-cell structure capable of suppressing formation of bubbles inside a liquid crystal layer or at the interface between a base film and a pressure-sensitive adhesive layer under high-temperature and high-humidity reliability conditions is provided. An exemplary transmittance-variable film can be applied to various applications, including various construction or automotive materials that require control of transmittance, or eyewear, such as augmented reality experience or sports goggles, sunglasses or helmets.
Type:
Grant
Filed:
December 19, 2018
Date of Patent:
March 1, 2022
Inventors:
Jung Doo Kim, Hyun Jun Lee, Yeon Keun Lee, Joo Hyun Lee, Dong Hyun Oh
Abstract: A liquid crystal aligning agent composition for forming a liquid crystal alignment film that can exhibit excellent alignment and electrical characteristics and simultaneously having enhanced durability, a method for preparing a liquid crystal alignment film using the liquid crystal aligning agent composition, and a liquid crystal alignment film comprising an aligned and cured product of the liquid crystal aligning agent composition and a liquid crystal display device comprising the liquid crystal alignment film.
Type:
Grant
Filed:
August 9, 2018
Date of Patent:
December 28, 2021
Assignee:
LG CHEM, LTD.
Inventors:
Seongku Kim, Hee Han, Jung Ho Jo, Sung Joon Min, Soon Ho Kwon, Jun Young Yoon, Hyeong Seuk Yun, Hoonseo Park
Abstract: A display device includes a display panel; a color conversion display panel overlapping the display panel; and a polarizing plate positioned between the display panel and the color conversion display panel, wherein the polarizing plate may include a polarization film and a transfer layer overlapping the polarization film, the transfer layer may be positioned between the polarization film and the display panel, and the transfer layer may include an acrylamide-based compound.
Type:
Grant
Filed:
January 1, 2018
Date of Patent:
November 23, 2021
Assignee:
Samsung Display Co., Ltd.
Inventors:
Sang-Gil Lee, Byung-Gon Kum, Eun Guk Lee
Abstract: A pressure-sensitive-adhesive-layer-attached polarizing film is disclosed having an odd shape, and capable of reducing occurrence of a crack in a polarizer and preventing peeling and foaming of a pressure-sensitive adhesive layer and warpage of a polarizing film. This pressure-sensitive-adhesive-layer-attached polarizing film comprises a polarizing film, and a pressure-sensitive adhesive layer on one surface of the polarizing film. The pressure-sensitive-adhesive-layer-attached polarizing film has an odd shape other than a rectangular shape, and when a strain gauge is attached to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at ?40° C. and a strain amount at 85° C. is 3000?? or less, and the creep value of the pressure-sensitive adhesive layer at 85° C. is 15-600 ?m inclusive.
Abstract: The present invention provides an alignment film capable of reducing generation of bubbles in a liquid crystal layer, a liquid crystal panel including the alignment film, and a method for producing the liquid crystal panel. The alignment film contains at least one selected from the group consisting of a polyamic acid containing a bisaniline fluorene skeleton and a polyimide containing a bisaniline fluorene skeleton. Preferably, the bisaniline fluorene skeleton of the polyamic acid is contained in a diamine unit of the polyamic acid and the bisaniline fluorene skeleton of the polyimide is contained in a diamine unit of the polyimide.
Abstract: Provided is a liquid crystal display device comprising a first substrate, a second substrate, and a liquid crystal composition disposed between said first substrate and said second substrate, wherein a surface of said first substrate in contact with said liquid crystal composition is provided with an alignment layer, while said second substrate has no alignment layer; and said liquid crystal composition comprises a liquid crystal compound, a self-aligning agent, and a polymerizable compound represented by Formula I,
Type:
Grant
Filed:
January 4, 2019
Date of Patent:
October 19, 2021
Assignee:
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIAL CO., LTD.
Inventors:
Zhian Liang, Jiaming Li, Sumin Kang, Xuan Zhang, Dongmei Wang
Abstract: The present invention relates to a polymer which is excellent in terms of liquid crystal alignment property, durability, and electrical characteristics, and thus is suitable for use in a liquid crystal aligning agent, a liquid crystal aligning agent composition including the same, a liquid crystal alignment film formed from the liquid crystal aligning agent composition, and a liquid crystal display device including the liquid crystal alignment film.
Type:
Grant
Filed:
August 16, 2018
Date of Patent:
October 5, 2021
Assignee:
LG CHEM, LTD.
Inventors:
Seongku Kim, Hee Han, Jung Ho Jo, Sung Joon Min, Soon Ho Kwon, Jun Young Yoon, Hyeongseuk Yun, Hoonseo Park
Abstract: A liquid crystal display device and a method of manufacturing a liquid crystal display device are provided. The liquid crystal display device includes: a base; an alignment inducing layer on the base and including a first compound represented by formula A1 or a polymer of the first compound; and a liquid crystal layer on the alignment inducing layer that includes liquid crystals: where R1 may be hydrogen or a polymerizable group, R2 may be a hydrophilic group, SP1 and SP2 may each independently be a single bond, a C1-C12 alkylene group, or a C1-C12 alkoxylene group, Z may be a single bond, an ester group, or an ether group, and X1, X2 and X3 may each independently be hydrogen, a methyl group, fluorine, or chlorine.
Type:
Grant
Filed:
September 26, 2018
Date of Patent:
September 28, 2021
Assignees:
Samsung Display Co., Ltd., Industrial Cooperation Foundation Chonbuk National University
Inventors:
Ho Lim, Shin Woong Kang, Keun Chan Oh, Jae Jin Lyu, Aboozar Nasrollahi, Vineet Kumar
Abstract: A display device includes a backlight, a first substrate on a path of light output from the backlight, a second substrate facing the first substrate, a light amount control layer between the first and second substrates, a color filter layer on the second substrate at a pixel area, and a light conversion layer between the light amount control layer and the color filter layer. The light conversion layer outputs white light.
Type:
Grant
Filed:
October 24, 2017
Date of Patent:
August 24, 2021
Assignee:
Samsung Display Co., Ltd.
Inventors:
Baekhee Lee, Youngmin Kim, Haeil Park, Kwangkeun Lee
Abstract: The disclosure discloses a sealant and a method for fabricating the same, and a display device. The sealant includes a thermal-curing agent and an epoxy resin, wherein the thermal-curing agent includes a diphenyl ketone alcohol compound capable of emitting a fluorescent light and a phosphorescent light simultaneously.
Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
Type:
Grant
Filed:
October 18, 2018
Date of Patent:
July 27, 2021
Assignee:
LG CHEM, LTD.
Inventors:
Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
Abstract: A display device includes an optical member and an optical sheet that is in a sheet form. The optical member includes a first surface. The optical sheet includes a second surface that is disposed to be opposed to the first surface. The first surface and the second surface are charged to a same polarity.
Abstract: A method of applying an alignment film on a substrate of a liquid crystal panel, the method includes: forming a surface having high wettability and a surface having low wettability, with respect to a material of the alignment film; bringing uniformly the material of the alignment film into contact with the surface having high wettability and the surface having low wettability when the material of the alignment film on the substrate is applied by using a transfer plate; and separating the transfer plate and the surface of the substrate such that the material of the alignment film is left on the surface having high wettability and the material of the alignment film is not left on the surface having low wettability.
Abstract: The present specification relates to a wide color gamut film including a transparent substrate; a wide color gamut layer provided on one surface of the transparent substrate, and including a compound including a photocurable functional group and a dye or a pigment having a maximum absorption wavelength of 580 nm to 610 nm; a surface layer provided on the wide color gamut layer, wherein the transparent substrate, the wide color gamut layer and the surface layer are consecutively laminated, and a polarizing plate and a liquid crystal display device including the same.
Type:
Grant
Filed:
September 13, 2016
Date of Patent:
July 20, 2021
Assignee:
LG CHEM, LTD.
Inventors:
Hanna Lee, Kyungki Hong, Yeongrae Chang
Abstract: The present invention provides a liquid crystal alignment film not only having an excellent alignment property and stability, but also having high film strength, and thus exhibiting excellent durability and a high residual image property, a method for preparing the same, and a liquid crystal display device using the same.
Type:
Grant
Filed:
October 18, 2018
Date of Patent:
June 15, 2021
Assignee:
LG CHEM, LTD.
Inventors:
Hyeong Seuk Yun, Jung Ho Jo, Sung Joon Min, Hee Han, Hang Ah Park, Sang Mi Lee, Soon Ho Kwon, Jun Young Yoon
Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate disposed to oppose the first substrate, a layer of liquid crystal located between the first substrate and the second substrate, and an alignment film disposed on the first substrate so as to be in contact with the layer of the liquid crystal. The liquid crystal has a refractive-index anisotropy ?n of 0.11 or more, the layer of the liquid crystal has a thickness d of 2.5 ?m or less, and a product ?nd of the refractive-index anisotropy ?n and the thickness d is 0.20 or more but 0.31 or less. The transmissivity of light having a wavelength of 450 nm in the first substrate and the alignment film is 85% or more but 97% or less.
Abstract: A photoalignment agent is provided. The photoalignment agent includes a copolymer of ii) at least one of a cyclobutanedianhydride (CBDA) and a cyclobutanedianhydride (CBDA) derivative, and ii) a diamine, and the diamine includes an electron donor group.
Type:
Grant
Filed:
January 5, 2018
Date of Patent:
June 8, 2021
Assignee:
SAMSUNG DISPLAY CO., LTD.
Inventors:
Suk Hoon Kang, Yeong Rong Park, Mi Hwa Lee, Jun Woo Lee, Baek Kyun Jeon
Abstract: A liquid crystal cell 10A according to the present invention includes: a pair of substrates 11 and 12 facing each other and having alignment films 11a and 12a formed on surfaces of the substrates, respectively, the surfaces facing each other; and a liquid crystal layer LC interposed between the substrates 11 and 12. The alignment films 11a and 12a contain a polymer for alignment films which has a hydrazide functional group represented by Chemical Formula (1).