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1. 发明授权

US11982896B2 Liquid crystal display device and polarizing plate 有权
公开(公告)号：US11982896B2
公开(公告)日：2024-05-14
申请号：US18106913
申请日：2023-02-07
申请人： SHARP KABUSHIKI KAISHA
发明人： Akira Sakai , Yuichi Kawahira , Masahiro Hasegawa , Kiyoshi Minoura
IPC分类号： G02F1/1335 , G02B5/30 , G02F1/13363
CPC分类号： G02F1/133528 , G02B5/3083 , G02F1/133504 , G02F1/133531 , G02F1/13363
摘要： Provided is a liquid crystal display device and a polarizing plate capable of improving the contrast ratio in the front direction. The polarizing plate includes a pair of polarizers including a first polarizer and a second polarizer whose transmission axes are parallel to each other; a retarder between the paired polarizers; and a diffusion layer in at least one of a region between the paired polarizers or a region on a side without the retarder of the first polarizer.

2. 发明授权

US11307337B2 Display device and method for manufacturing display device 有权
公开(公告)号：US11307337B2
公开(公告)日：2022-04-19
申请号：US16499238
申请日：2018-03-23
申请人： SHARP KABUSHIKI KAISHA
发明人： Akira Sakai , Masahiro Hasegawa , Atsushi Ban , Koji Murata , Yuichi Kawahira , Kiyoshi Minoura , Takako Koide , Kozo Nakamura
IPC分类号： G02B5/30 , G02F1/1335 , G06F3/041 , H01L27/32 , H01L51/52
摘要： The present invention provides: (I) a display device including a display panel, a retardation layer, and a polarizer which are stacked in the stated order from a back surface side to a viewing surface side and integrated without an adhesive layer; and (II) a method for producing a display device including: forming a first alignment film on a display panel, applying a solution containing first polymerizable liquid crystal to the first alignment film, and curing the first polymerizable liquid crystal to produce a retardation layer; and forming a second alignment film on the retardation layer, applying a solution containing second polymerizable liquid crystal and a dichroic material to the second alignment film, and curing the second polymerizable liquid crystal to produce a polarizer.

3. 发明授权

US11131891B2 Liquid crystal display device 有权
公开(公告)号：US11131891B2
公开(公告)日：2021-09-28
申请号：US16630115
申请日：2018-07-06
申请人： SHARP KABUSHIKI KAISHA
发明人： Akira Sakai , Yuichi Kawahira , Koji Murata , Masahiro Hasegawa , Takako Koide , Kozo Nakamura , Kiyoshi Minoura
IPC分类号： G02F1/1343 , G02F1/13363 , G02F1/1335 , G02F1/1337
摘要： The present invention provides a liquid crystal display device of a transverse electric field mode that may inhibit internal reflection and realize proper black display to which coloring does not occur. The present invention provides a liquid crystal display device including a first linear polarizer, a first λ/4 retardation layer, a first substrate, a second λ/4 retardation layer configured with a different material from the first λ/4 retardation layer, a liquid crystal layer that contains liquid crystals which are horizontally aligned in a case where no voltage is applied, plural electrode pairs that generate a transverse electric field in the liquid crystal layer by a voltage being applied, a second substrate, a second linear polarizer, and a backlight. In a case where a color of light emitted from the backlight is expressed by using chromaticity coordinates (x, y) of an XYZ color system, both of x and y are 0.32 or greater. The plural electrode pairs include a red electrode pair arranged in a red sub-pixel, a green electrode pair arranged in a green sub-pixel, and a blue electrode pair arranged in a blue sub-pixel. A white display applied voltage of the blue electrode pair is different from the white display applied voltage of the red electrode pair and the white display applied voltage of the green electrode pair.

4. 发明授权

US11099434B2 Liquid crystal display panel 有权
公开(公告)号：US11099434B2
公开(公告)日：2021-08-24
申请号：US16780559
申请日：2020-02-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Koji Murata , Kohzoh Nakamura , Kiyoshi Minoura , Akira Sakai , Yuichi Kawahira
IPC分类号： G02F1/13363 , G02F1/1337 , G02F1/139 , G02F1/1335
摘要： A liquid crystal display panel performs displaying in the normally white mode. A first and a second polarizer are disposed so that the transmission axes thereof are perpendicular to each other. A liquid crystal layer is in a twisted alignment state in the absence of an applied voltage. A first substrate has a first electrode having a plurality of rectangular openings extending in parallel to each other, and a second electrode facing the first electrode with a dielectric layer interposed therebetween. The openings each independently have a width S of more than 0.6 μm and not more than 1.4 μm, and each pair of adjacent openings independently has a distance L therebetween of not less than 0.3 μm and not more than 0.7 μm. A first and a second horizontal alignment film each have an azimuthal anchoring energy of not more than 1×10−4J/m2.

5. 发明授权

US10725336B2 Liquid crystal display panel and liquid crystal display device 有权
公开(公告)号：US10725336B2
公开(公告)日：2020-07-28
申请号：US16302632
申请日：2017-05-16
申请人： SHARP KABUSHIKI KAISHA
发明人： Yuichi Kawahira , Akira Sakai , Kozo Nakamura , Masahiro Hasegawa , Takako Koide , Koji Murata , Kiyoshi Minoura
IPC分类号： G02F1/1333 , G02F1/1335 , G02F1/13363 , G02F1/1339 , G02B5/30 , G02F1/1337 , G02F1/1343
摘要： 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.

6. 发明授权

US10678087B2 Liquid crystal display panel and liquid crystal display device 有权
公开(公告)号：US10678087B2
公开(公告)日：2020-06-09
申请号：US16486726
申请日：2018-02-14
申请人： SHARP KABUSHIKI KAISHA
发明人： Akira Sakai , Yuichi Kawahira , Koji Murata , Masahiro Hasegawa , Takako Koide , Kozo Nakamura , Kiyoshi Minoura
IPC分类号： G02F1/1335 , G02F1/13363 , G02F1/1339
摘要： A liquid crystal display panel includes a first λ/4 retardation layer, a first substrate, a color filter layer, a liquid crystal layer containing horizontally aligned liquid crystals, and a second λ/4 retardation layer that is formed from a different material from the first λ/4 retardation layer between the first substrate and the color filter layer or between the color filter layer and the liquid crystal layer. The second λ/4 retardation layer has a smaller thickness in a region overlapping the blue color filter than in a region overlapping the green color filter. The first λ/4 retardation layer provides a retardation Rout(λ) to light having a wavelength of λ nm. The second λ/4 retardation layer provides a retardation Rin(λ). The retardation Rout(λ) and the retardation Rin(λ) satisfy the following formula (1) in the region overlapping the blue color filter. −1.0 nm

7. 发明授权

US10670911B2 Liquid crystal display panel and liquid crystal display device 审中-公开
公开(公告)号：US10670911B2
公开(公告)日：2020-06-02
申请号：US16303016
申请日：2017-05-16
申请人： SHARP KABUSHIKI KAISHA
发明人： Yuichi Kawahira , Akira Sakai , Kozo Nakamura , Masahiro Hasegawa , Takako Koide , Koji Murata , Kiyoshi Minoura
IPC分类号： G02F1/1335 , G02F1/13363 , G02F1/1337 , G02F1/1339 , G02F1/1333 , G02B5/20 , G02B5/30
摘要： 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, d 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 stow 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.

8. 发明申请

US20200166800A1 SUNLIGHT READABLE LCD WITH UNIFORM IN-CELL RETARDER 审中-公开
公开(公告)号：US20200166800A1
公开(公告)日：2020-05-28
申请号：US16778108
申请日：2020-01-31
申请人： Sharp Kabushiki Kaisha
发明人： Nathan James Smith , Kiyoshi Minoura , Akira Sakai , Yuichi Kawahira
IPC分类号： G02F1/1335 , H01L27/12 , G02F1/13357 , G02F1/1337 , G02F1/1362 , G02F1/135
摘要： A display device in which ambient light reflections, for example, from IPS or FFS type displays are reduced by a circular polariser (e.g., linear polariser combined with external quarter waveplate) to make the light circular polarized, as it traverses the multiple reflective layers between the polariser and LC layer, and then an internal quarter waveplate converts the light back to linear polarisation before it enters the LC, so the display can operate as normal, while the circular polariser absorbs unwanted reflections of ambient light from within the display.

9. 发明申请

US20190278120A1 LOW REFLECTIVITY LCD WITH COP RETARDER AND COP MATCHING RM 审中-公开
公开(公告)号：US20190278120A1
公开(公告)日：2019-09-12
申请号：US15918093
申请日：2018-03-12
申请人： Sharp Kabushiki Kaisha
发明人： Nathan James Smith , Andrew Acreman , Hywel Hopkin , Kiyoshi Minoura , Koji Murata , Yuichi Kawahira , Akira Sakai , Jiyun Yu
IPC分类号： G02F1/13363 , G02F1/1335 , G02F1/1337 , G02F1/1339
摘要： A liquid crystal device (LCD) is configured for minimizing unwanted internal ambient light reflections. The LCD includes a plurality of layers, the layers comprising from a viewing side: a first linear polariser; an external retarder that is made of a cyclic olefin polymer (COP) material or a cyclic olefin copolymer (COC) material; a colour filter substrate; a colour filter layer; an internal reactive mesogen (RM) retarder alignment layer; an internal reactive mesogen (RM) retarder; a liquid crystal (LC) layer; and a second linear polarizer. The external retarder and the internal RM retarder are configured such that the optical properties (for example light polarization control function) of the external retarder and the internal retarder are matched to negate each other for light passing through the external retarder and the internal RM retarder. The LCD simultaneously maintains high image quality in both high and low ambient lighting conditions.

10. 发明授权

US10180594B2 Mirror display 有权
公开(公告)号：US10180594B2
公开(公告)日：2019-01-15
申请号：US15306791
申请日：2015-04-21
申请人： Sharp Kabushiki Kaisha
发明人： Hiroyuki Hakoi , Masahiro Hasegawa , Akira Sakai , Kiyoshi Minoura
IPC分类号： G02F1/1335 , G02B5/30 , G02B7/00 , G09F9/35
摘要： The present invention provides a mirror display that can suppress warp of a half mirror plate with a reflective polarizer under heat to prevent distortion of a reflected image in a mirror mode. The mirror display of the present invention includes a half mirror plate that includes a first reflective polarizer and a first base material, a display device, and a warp-suppressing member that suppresses shrinking of the first reflective polarizer under heat. The first reflective polarizer and the first base material are integrated, and the display device is disposed on the back surface side of the half mirror plate.

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