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公开(公告)号：US20210103083A1
公开(公告)日：2021-04-08
申请号：US16319461
申请日：2017-07-18
Applicant: SHARP KABUSHIKI KAISHA
Inventor： KOJI MURATA , AKIRA SAKAI , YUICHI KAWAHIRA , MASAHIRO HASEGAWA , TAKAKO KOIDE , KOZO NAKAMURA , KIYOSHI MINOURA
Abstract: The present invention provides a method for producing a retardation film excellent in retardation controllability against heat and the retardation film. The method for producing a retardation film includes, in the following order: fixing an alignment of liquid crystal compounds to form a retardation giving layer, and heating the retardation giving layer. Preferably, the heating is first heating and the method further includes second heating for heating the retardation giving layer after the first heating.
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公开(公告)号：US20190285924A1
公开(公告)日：2019-09-19
申请号：US16297368
申请日：2019-03-08
Applicant: SHARP KABUSHIKI KAISHA
Inventor： TAKAKO KOIDE , AKIRA SAKAI , MASAHIRO HASEGAWA , YUICHI KAWAHIRA , KOJI MURATA , KIYOSHI MINOURA
IPC: G02F1/13363 , G02F1/1335 , G02F1/1337 , G02F1/1368 , G02F1/1339
Abstract: The present invention provides a liquid crystal display device configured to prevent impurities in a retardation layer in a liquid crystal cell from dissolving into a liquid crystal layer, achieving excellent reliability. The liquid crystal display device including, in the following order from a viewing surface side toward a back surface side: a first polarizing plate; a first λ/4 retardation layer; a supporting substrate; a second λ/4 retardation layer; a first overcoat layer; an alignment film; a liquid crystal layer containing liquid crystal molecules horizontally aligned with no voltage applied; a TFT substrate including a pair of electrodes configured to generate a transverse electric field in the liquid crystal layer upon voltage application; and a second polarizing plate.
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公开(公告)号：US20190219871A1
公开(公告)日：2019-07-18
申请号：US16302632
申请日：2017-05-16
Applicant: SHARP KABUSHIKI KAISHA
Inventor： YUICHI KAWAHIRA , AKIRA SAKAI , KOZO NAKAMURA , MASAHIRO HASEGAWA , TAKAKO KOIDE , KOJI MURATA , KIYOSHI MINOURA
IPC: G02F1/1335 , G02F1/13363 , G02F1/1337 , G02F1/1339 , G02F1/1343
Abstract: The liquid crystal display panel includes: a first polarizing plate; a first λ/4 plate; a first substrate; a second λ/4 plate; a liquid crystal layer; a second substrate; and a second polarizing plate, wherein the first substrate includes a black matrix but no photo spacer, the second substrate includes a photo spacer overlapping with the black matrix, liquid crystal molecules in the liquid crystal layer homogeneously align with no voltage application, the second λ/4 plate covers no side surface of the photo spacer, and the in-plane slow axis of the first λ/4 plate forms an angle of 45° with the transmission axis of the first polarizing plate and is orthogonal to the in-plane slow axis of the second λ/4 plate.
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公开(公告)号：US20190155082A1
公开(公告)日：2019-05-23
申请号：US16093358
申请日：2017-04-07
Applicant: SHARP KABUSHIKI KAISHA
Inventor： AKIRA SAKAI , MASAHIRO HASEGAWA , TAKAKO KOIDE , KOZO NAKAMURA , KIYOSHI MINOURA , YUICHI KAWAHIRA , KOJI MURATA
IPC: G02F1/13363 , G02F1/1343 , G02F1/1335
Abstract: The liquid crystal display panel includes: a first polarizing plate; a first retardation provision portion including a first λ/4 plate; a first substrate; a second retardation provision portion including a second λ/4 plate; a liquid crystal layer containing nematic liquid crystal; a second substrate; and a second polarizing plate. One of the first substrate and the second substrate includes a pair of electrodes configured to generate a horizontal electric field at the liquid crystal layer upon voltage application. The nematic liquid crystal homogeneously aligns with no voltage application between the electrodes. One of the first retardation provision portion and the second retardation provision portion includes, on the first substrate side, a first retarder. The in-plane slow axis of the first λ/4 plate forms an angle of 45° with the absorption axis of the first polarizing plate and is orthogonal to the in-plane slow axis of the second λ/4 plate.
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公开(公告)号：US20220121066A1
公开(公告)日：2022-04-21
申请号：US17498716
申请日：2021-10-11
Applicant: SHARP KABUSHIKI KAISHA
Inventor： YUICHI KAWAHIRA , TAKAKO KOIDE , MASAHIRO HASEGAWA , AKIRA HIRAI , AKIRA SAKAI , KIYOSHI MINOURA
IPC: G02F1/1337 , G06F3/041 , G02F1/1335 , G02F1/1368 , G02F1/13363 , G02F1/1333 , G02F1/1343 , G02F1/1362
Abstract: The liquid crystal display device includes, sequentially from a viewing surface side to a back surface side: a linearly polarizing plate and a circularly polarizing plate including a first λ/4 retardation layer; a thin-film transistor substrate including a pair of electrodes disposed in a pixel region and a metal line disposed outside the pixel region; a liquid crystal layer containing liquid crystal molecules aligned parallel to the thin-film transistor substrate, alignment of the liquid crystal molecules varying in response to an electric field generated by application of voltage to the pair of electrodes; a color filter substrate including a color filter layer; and a backlight, the thin-film transistor substrate including a second λ/4 retardation layer, the color filter substrate including a reflective layer disposed outside the pixel region and configured to reflect incident light from the backlight toward the back surface.
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Patent Agency Ranking
公开(公告)号：US20210341787A1
公开(公告)日：2021-11-04
申请号：US17279543
申请日：2018-09-28
Applicant: SHARP KABUSHIKI KAISHA
Inventor： MASAHIRO HASEGAWA , MIHO YAMADA , AKIRA SAKAI
IPC: G02F1/1335 , G02F1/13363 , G02F1/1337
Abstract: A circular polarizer according to the disclosure includes a λ/4 layer, and a polarization layer that is layered on the λ/4 layer and includes a lyotropic liquid crystal, and an overcoat layer covering an upper surface and a side surface of the polarization layer and a side surface of the λ/4 layer is formed.
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公开(公告)号：US20210028407A1
公开(公告)日：2021-01-28
申请号：US17042893
申请日：2018-03-29
Applicant: SHARP KABUSHIKI KAISHA
Inventor： AKIRA SAKAI , MASAHIRO HASEGAWA
Abstract: A display device including a light-emitting layer, a touch panel, a phase difference layer, and a linear polarizing layer, wherein the touch panel and the phase difference layer are provided between the light-emitting layer and the linear polarizing layer, the touch panel includes a touch panel base material and a touch panel electrode, the touch panel base material is formed from a resin film, a phase difference of the resin film is (λ0/4)+α0 at reference wavelength λ0, the phase difference layer is formed from a polymerizable liquid crystal material, a phase difference α of the phase difference layer is α0 at reference wavelength λ0, and a slow axis of the resin film is orthogonal to a slow axis of the phase difference layer.
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公开(公告)号：US20190293997A1
公开(公告)日：2019-09-26
申请号：US16303016
申请日：2017-05-16
Applicant: SHARP KABUSHIKI KAISHA
Inventor： YUICHI KAWAHIRA , AKIRA SAKAI , KOZO NAKAMURA , MASAHIRO HASEGAWA , TAKAKO KOIDE , KOJI MURATA , KIYOSHI MINOURA
IPC: G02F1/1335 , G02F1/13363 , G02F1/1339 , G02F1/1337
Abstract: The liquid crystal display panel includes: a first polarizing plate; a first λ/4 plate: a first substrate; a second λ/4 plate; a liquid crystal layer; a second substrate, and a second polarizing plate, wherein the first substrate includes a black matrix, and a photo spacer overlapping with the black matrix, liquid crystal molecules in the liquid crystal layer homogeneously align with no voltage application, the second λ/4 plate is made of a self-assembling photo alignment material containing a photo functional group capable of causing at least one chemical reaction selected from the group consisting of photodimerization, photoisomerization, and photo-Fries rearrangement, and covers a side surface of the photo spacer, and the in-plane slow axis of the first λ/4 plate forms an angle of 45° with the transmission axis of the first polarizing plate and is orthogonal to the in-plane slow axis of the second λ/4 plate.
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公开(公告)号：US20190163004A1
公开(公告)日：2019-05-30
申请号：US16203176
申请日：2018-11-28
Applicant: SHARP KABUSHIKI KAISHA
Inventor： YUICHI KAWAHIRA , KIYOSHI MINOURA , AKIRA SAKAI , TAKAKO KOIDE , MASAHIRO HASEGAWA , KOJI MURATA
IPC: G02F1/13363 , G02F1/1335 , G02F1/1337 , G02F1/1343
Abstract: The liquid crystal display panel includes in the following order from a viewing surface side to a back surface side: a first polarizer; a first λ/4 retardation layer; a first substrate; a second λ/4 retardation layer; a liquid crystal layer; a second substrate; and a second polarizer, the liquid crystal display panel being in a transverse electric field mode, the first substrate including a color filter layer in a display region, the second λ/4 retardation layer being a single layer covering the color filter layer and including a first retardation portion in an end region of the display region and a second retardation portion in a central region of the display region, the first retardation portion having a greater thickness than the second retardation portion, and the first retardation portion and the second retardation portion differing from each other in in-plane retardation by 10 nm or less.
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公开(公告)号：US20190121005A1
公开(公告)日：2019-04-25
申请号：US16309094
申请日：2017-03-16
Applicant: SHARP KABUSHIKI KAISHA
Inventor： MASAHIRO HASEGAWA
Abstract: The size of a device can be decreased, a foreign substance is inhibited from being seen in a captured image, and more than one kind of image, that is, a visible-light image and a near-infrared-light image can be captured singly by the device. An imaging device includes an imaging element that captures an image of an object formed by light that passes through an optical system, and a signal-reading portion that reads an image signal from the imaging element, and a filter portion that is disposed on an optical axis of the optical system. The filter portion includes a visible-light-shielding portion that obstructs visible light, and a near-infrared-light-shielding portion that obstructs near-infrared light. The position of the filter portion relative to the imaging element is fixed.
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