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公开(公告)号：US11543698B2
公开(公告)日：2023-01-03
申请号：US17118340
申请日：2020-12-10
发明人： Takahiro Sasaki , Ming Ni , Takashi Satoh , Keiichi Ina , Shuji Nishi
IPC分类号： G02F1/1335 , G09G3/36
摘要： A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, and a plurality of pixels. Each of the pixels has a reflection region for performing display in a reflective mode. The first substrate includes a pixel electrode provided in each of the pixels and a reflection layer positioned opposite to the liquid crystal layer with respect to the pixel electrode. The reflection layer has a first region positioned in each of the pixels and a second region positioned between any two pixels adjacent to each other. Voltages of an identical polarity are applied to the liquid crystal layer for any two pixels adjacent to each other in a row direction, for any two pixels adjacent to each other in a column direction, or for all the pixels.
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公开(公告)号：US11048123B2
公开(公告)日：2021-06-29
申请号：US16571330
申请日：2019-09-16
发明人： Takashi Satoh
IPC分类号： G02F1/13363 , G02F1/1335 , G02F1/1343 , G02F1/137 , G02F1/1337
摘要： A reflective-type liquid crystal display device includes: a first substrate including a light-reflective first electrode; a second substrate including a light-transmissive second electrode; a liquid crystal layer that is provided between the first electrode and the second electrode and takes a generally vertical alignment during black display; a polarizing layer provided on a viewer side of the second substrate; and a first retardation layer, a second retardation layer and a third retardation layer that are arranged in this order from a side of the polarizing layer, wherein 40°≤|θ3−2×θ2+2×θ1|≤50°, 130°≤|θ3−2×θ2+2×θ1|≤140°, 220°≤|θ3−2×θ2+2×θ1|≤230° or 310°≤|θ3−2×θ2+2×θ1|≤320° is satisfied, where θ1 denotes an angle formed between an absorption axis or a transmission axis of the polarizing layer and a slow axis of the first retardation layer, θ2 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of second retardation layer, and θ3 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of the third retardation layer.
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公开(公告)号：US11009756B2
公开(公告)日：2021-05-18
申请号：US16664238
申请日：2019-10-25
发明人： Keiichi Ina , Shuji Nishi , Takashi Satoh
IPC分类号： G02F1/1362 , G02F1/1343 , G02F1/1335 , G09G3/36
摘要： A display device includes a reflective electrode, a driving circuit section, a wiring, and a wiring expansion section. The reflective electrode is divided into split electrodes arranged with spaces, which transmit light, respectively provided thereamong and reflects light. The driving circuit section drives the reflective electrode. The wiring is connected to at least the split electrodes and the driving circuit section and composed of a conductive material having a light transmission property. The wiring expansion section is formed to expand in the wiring to overlap the space.
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公开(公告)号：US10774182B2
公开(公告)日：2020-09-15
申请号：US16308767
申请日：2017-06-08
IPC分类号： C08G73/10 , G02F1/1337 , G02F1/03 , G02F1/1333
摘要： The present invention provides a liquid crystal display device in which flicker and image sticking caused by long-term use are suppressed. The liquid crystal display device includes, in the following order: a first substrate; a liquid crystal layer; and a second substrate, the liquid crystal display device including an alignment film including a polymer containing a salicylic acid derivative functional group in a side chain on the liquid crystal layer side of at least one of the first substrate and the second substrate, the salicylic acid derivative functional group having a structure represented by the following formula (Z):
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公开(公告)号：US11480827B2
公开(公告)日：2022-10-25
申请号：US17511504
申请日：2021-10-26
发明人： Takahiro Sasaki , Takashi Satoh , Ming Ni , Shuji Nishi , Keiichi Ina
IPC分类号： G02F1/133 , G02F1/1335 , G02F1/1337 , G02F1/1343 , G02F1/1333
摘要： A liquid crystal display device includes a first substrate, a second substrate, a vertical alignment liquid crystal layer, and a plurality of pixels. Each of the pixels includes a reflective region for performing display in a reflection mode. The first substrate includes a reflective electrode including a first region located within each of the plurality of pixels and a second region located between any two pixels, of the plurality of pixels, adjacent to each other, a transparent insulating layer provided to cover the reflective electrode, and a pixel electrode formed from a transparent conductive material and provided on the transparent insulating layer in each of the plurality of pixels. The second substrate includes a counter electrode provided to be opposite to the pixel electrode and the reflective electrode. Voltage of the same polarity is applied to the liquid crystal layer of any two pixels, of the plurality of pixels, adjacent to each other along a row direction, any two pixels, of the plurality of pixels, adjacent to each other along a column direction, or all of the plurality of pixels. The counter electrode and the reflective electrode are provided with potentials different from each other.
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公开(公告)号：US11319488B2
公开(公告)日：2022-05-03
申请号：US16498215
申请日：2018-03-27
发明人： Masanobu Mizusaki , Tomonori Itoh , Takashi Satoh
IPC分类号： C09K19/38 , G02F1/1335 , G02F1/1337 , C09K19/12 , C09K19/30 , C09K19/56 , G02F1/1333 , C08G73/10
摘要： A liquid crystal display device includes an element substrate, a counter substrate, a liquid crystal layer sandwiched between the element substrate and the counter substrate, reflective electrodes placed on a surface of the element substrate that is located on the liquid crystal layer side, and a pair of alignment films each of which is placed on a corresponding one of a surface of the element substrate that is located on the liquid crystal layer side and a surface of the counter substrate that is located on the liquid crystal layer side. A liquid crystal composition contained in the liquid crystal layer contains a compound containing an alkoxy group. The alignment films contain a polymer including polyimide. The polyimide is derived from a polyamic acid and contains a side chain represented by Formula (1).
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公开(公告)号：US10884287B2
公开(公告)日：2021-01-05
申请号：US16303640
申请日：2017-05-16
发明人： Takuya Ootani , Kiyoshi Minoura , Takashi Satoh
IPC分类号： G02F1/1335 , G02F1/1337 , G02F1/1362 , G02F1/13363
摘要： A reflective liquid crystal display device has a first substrate having a first electrode that reflects light; a second substrate having a second electrode that transmits light; a liquid crystal layer provided between the first electrode and the second electrode, including a nematic liquid crystal material having negative dielectric anisotropy Δε and a chiral agent, having nearly vertical alignment when no voltage is applied, and having twist alignment or hybrid alignment when white voltage is applied; and a polarizing layer provided on the observer side of the second substrate and at least one retarder layer disposed between the polarizing layer and the second substrate, wherein the reflective liquid crystal display device has a drive circuit that applies black voltage or white voltage across the liquid crystal layer at a frame rate of 1 fps or less, and when applying white voltage across the liquid crystal layer over a plurality of frames, the drive circuit applies the white display voltage whose polarity is inverted for each frame with respect to the potential of the second electrode, and assuming that a natural pitch of the nematic liquid crystal material including the chiral agent is p, that a thickness of the liquid crystal layer is d, and that a birefringence of the nematic liquid crystal material is Δn, 60°
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公开(公告)号：US11428981B2
公开(公告)日：2022-08-30
申请号：US17105622
申请日：2020-11-26
发明人： Takahiro Sasaki , Hiroyuki Hakoi , Takashi Satoh , Junichi Hashimoto , Ming Ni
IPC分类号： G02F1/1335 , G02F1/13363 , G02F1/1368 , G02F1/1337 , G02F1/137
摘要： A liquid crystal display panel includes pixels including a reflective region for display in a reflection mode and a transmissive region for display in a transmission mode. The liquid crystal display panel includes a liquid crystal layer including a nematic liquid crystal material having negative dielectric anisotropy and a chiral agent, a pixel electrode including a reflective conductive layer and a transparent conductive layer, a counter electrode, a light diffusing structure provided in common to the reflective region and the transmissive region, and a first vertical alignment film provided between the pixel electrode and the liquid crystal layer, and a second vertical alignment film provided between the counter electrode and the liquid crystal layer. At least one of the first vertical alignment film and the second vertical alignment film has an alignment regulating force defining a pretilt azimuthal direction, and in a case where the thickness of the liquid crystal layer in the reflective region is dr, and the thickness of the liquid crystal layer in the transmissive region is dt, dr and dt are in a range of 0.85≤dt/dr≤1.25.
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公开(公告)号：US11150520B2
公开(公告)日：2021-10-19
申请号：US17169282
申请日：2021-02-05
发明人： Keiichi Ina , Takashi Satoh , Takahiro Sasaki
IPC分类号： G02F1/1337 , G02F1/1343 , G02F1/137 , G02F1/1335
摘要： Each pixel has a reflection region to produce a display in reflection mode. The first substrate includes: a pixel electrode for each pixel; and a first vertical alignment film. The second substrate includes: an opposite electrode opposite the pixel electrodes; and a second vertical alignment film. Of the first and second vertical alignment films, only the second vertical alignment film exerts an alignment-regulating force that determines a pretilt angle. Each pixel electrode includes a plurality of subpixel electrodes. The opposite electrode has an opening in an area corresponding to one of four corners of at least one of the plurality of subpixel electrodes. Liquid crystal molecules in a thickness-wise middle portion of the liquid crystal layer on the subpixel electrode are oriented toward the opening.
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公开(公告)号：US11016345B2
公开(公告)日：2021-05-25
申请号：US16492585
申请日：2018-03-02
发明人： Masanobu Mizusaki , Tomonori Itoh , Takashi Satoh
IPC分类号： G02F1/1337 , G02F1/13363 , G02F1/1343 , G02F1/137
摘要： 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).
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