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    Light modulation element
    1.
    发明授权
    Light modulation element 有权

    公开(公告)号：US11624940B2

    公开(公告)日：2023-04-11

    申请号：US17434598

    申请日：2020-03-03

    申请人： LG Chem, Ltd.

    发明人： Min Jun Gim ,  Eun Jung Lim ,  Jung Sun You ,  Jin Hong Kim ,  Hyun Jun Lee ,  Dong Hyun Oh

    IPC分类号： G02F1/1339 ,  G02F1/01 ,  G02F1/1347 ,  G02F1/139

    摘要： A light modulation element that can vary between a bright transparent mode and a dark scattering mode is provided. The light modulation element has a first light modulation layer and a second light modulation layer comprising nematic liquid crystals and a dichroic dye in a scattering mode when a voltage is applied. The first light modulation layer and the second light modulation layer are disposed to overlap each other. The light modulation element has an improved contrast ratio and haze-variable characteristics, without precipitation of dichroic dyes and an increase in power consumption.

    Transmittance-Variable Device
    5.
    发明申请
    Transmittance-Variable Device 有权

    公开(公告)号：US20210311342A1

    公开(公告)日：2021-10-07

    申请号：US17269158

    申请日：2019-09-04

    申请人： LG Chem, Ltd.

    发明人： Eun Jung Lim ,  Min Jun Gim ,  Sergey Belyaev ,  Dong Hyun Oh

    IPC分类号： G02F1/139 ,  G02F1/13363 ,  G02F1/1335 ,  G02F1/1337

    摘要： A transmittance-variable device is disclosed herein. In some embodiments, the transmittance-variable device includes a retardation film, a liquid crystal alignment film, and a liquid crystal layer configured to implement a twist orientation mode, wherein the retardation film, the liquid crystal alignment film and the liquid crystal layer are sequentially arranged, wherein a twist angle (T) is in a range of 50 degrees to 180 degrees, and wherein the smallest angle A between a slow axis of the retardation film and an alignment direction of the liquid crystal alignment film satisfies Equation 1 when a product (Δnd) of a refractive index anisotropy (Δn) and a thickness (d) is 0.7 μm or less, and satisfies Equation 2 when the product (Δnd) is more than 0.7 μm. The transmittance-variable device can be applied to various applications without causing problems such as a crosstalk phenomenon, a rainbow phenomenon or a mirroring phenomenon.

    Transmittance-variable device
    7.
    发明授权
    Transmittance-variable device 有权

    公开(公告)号：US11003032B2

    公开(公告)日：2021-05-11

    申请号：US16607581

    申请日：2018-04-25

    申请人： LG Chem, Ltd.

    发明人： Dong Hyun Oh ,  Eun Jung Lim ,  Nam Hun Kim

    IPC分类号： G02F1/137 ,  G02F1/1347 ,  C09K19/54 ,  C09K19/60 ,  G02B27/01 ,  G02C7/10 ,  G02F1/13363 ,  G02F1/1337

    摘要： A transmittance-variable device is disclosed herein. In some embodiments, the transmittance-variable device includes a first guest host layer, a second guest host layer, and a phase difference element disposed between the first and second guest host layers, wherein each of the first and second guest host layers comprise a liquid crystal host and a dichroic dye guest, and the liquid crystal hosts are capable of being horizontally oriented such that their optical axes are horizontal to each other. The transmittance-variable device can switch between a clear state and a black state, can exhibit high transmittance in the clear state and a high shielding rate in the black state, and can exhibit a high contrast ratio even at the inclination angle. Such a transmittance-variable device can be used in architectural or automotive materials, or eyewear such as goggles for augmented reality experience or sports, sunglasses or helmets.

    Liquid crystal device
    9.
    发明授权
    Liquid crystal device 有权

    公开(公告)号：US10329485B2

    公开(公告)日：2019-06-25

    申请号：US14602056

    申请日：2015-01-21

    申请人： LG CHEM, LTD.

    发明人： Sung Joon Min ,  Dong Hyun Oh ,  Jung Sun You ,  Jin Hong Kim

    IPC分类号： C09K19/40 ,  C09K19/52 ,  C09K19/54 ,  G02F1/1334

    摘要： A liquid crystal device, a precursor composition, a method of manufacturing a liquid crystal device, an apparatus of manufacturing a liquid crystal device, and use of the liquid crystal device are provided. A device capable of being driven at a low driving voltage can be provided. The device can be realized so that the device can be driven in a normally transparent mode or a normally black mode. Also, the device has other excellent characteristics such as a contrast ratio. Such a liquid crystal device can be applied to various light modulation devices such as smart windows, window-protecting films, flexible display devices, active retarders for displaying 3D images, or viewing angle-adjusting films.