公开(公告)号：US10247988B2

公开(公告)日：2019-04-02

申请号：US15636781

申请日：2017-06-29

Applicant: Japan Display Inc.

Inventor： Tatsuya Ide ,  Daisuke Sonoda ,  Yasushi Tomioka

IPC: G02F1/13 ,  G02F1/1343 ,  G02F1/1335 ,  G02F1/136 ,  G02F1/1333 ,  G02F1/1345 ,  H01L51/00 ,  G02F1/1362

Abstract: According to one embodiment, a display device includes an insulating substrate including a first surface, and a second surface opposite to the first surface, a circuit board mounted on the first surface, a supporting member adhered to the insulating substrate on the second surface, and an antistatic layer located between the insulating substrate and the supporting member.

公开(公告)号：US10197857B2

公开(公告)日：2019-02-05

申请号：US15826366

申请日：2017-11-29

Applicant: Japan Display Inc.

Inventor： Noboru Kunimatsu ,  Masaki Matsumori ,  Hidehiro Sonoda ,  Yasushi Tomioka ,  Toshiki Kaneko

IPC: G02F1/1337 ,  G02F1/1339 ,  G02F1/1333 ,  G02F1/1362 ,  G02F1/1368

Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.

公开(公告)号：US10146096B2

公开(公告)日：2018-12-04

申请号：US16005896

申请日：2018-06-12

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Toshimasa Ishigaki ,  Hidehiro Sonoda ,  Sumito Ueta

IPC: G02F1/1362 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1368 ,  G02F1/1333

Abstract: A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.

公开(公告)号：US20180164648A1

公开(公告)日：2018-06-14

申请号：US15891707

申请日：2018-02-08

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Yosuke Hyodo ,  Hidehiro Sonoda ,  Noboru Kunimatsu

IPC: G02F1/1343 ,  G02F1/1333 ,  G02F1/1368 ,  G02F1/1362 ,  G02F1/1335 ,  G02F1/1337

CPC classification number: G02F1/134363 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133788 ,  G02F1/136227 ,  G02F1/1368 ,  G02F2202/02 ,  H01L27/1218

Abstract: In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment material can flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.

公开(公告)号：US09921440B2

公开(公告)日：2018-03-20

申请号：US15693564

申请日：2017-09-01

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Yosuke Hyodo ,  Hidehiro Sonoda ,  Noboru Kunimatsu

IPC: G02F1/1343 ,  G02F1/1337 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1333

CPC classification number: G02F1/134363 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/133788 ,  G02F1/136227 ,  G02F1/1368 ,  G02F2202/02 ,  H01L27/1218

Abstract: In a liquid crystal display device, a common electrode is formed on an organic passivation film, an interlayer insulating film is formed on the common electrode, a pixel electrode with a slit is formed on the interlayer insulating film, and a through hole is formed in the organic passivation film and the interlayer insulating film, so that the pixel electrode is connected to a source electrode of a TFT through the through hole. Further, the taper angle around the upper base of the through hole is smaller than the taper angle around the lower base. Thus, the alignment film material can easily flow into the through hole when the diameter of the through hole is reduced to connect the pixel and source electrodes, preventing display defects such as uneven brightness due to the absence of the alignment film or due to the alignment film irregularity around the through hole.

公开(公告)号：US09864235B2

公开(公告)日：2018-01-09

申请号：US15284864

申请日：2016-10-04

Applicant: Japan Display Inc.

Inventor： Noboru Kunimatsu ,  Masaki Matsumori ,  Hidehiro Sonoda ,  Yasushi Tomioka ,  Toshiki Kaneko

IPC: G02F1/1337 ,  G02F1/1339 ,  G02F1/1333 ,  G02F1/1362 ,  G02F1/1368

CPC classification number: G02F1/1337 ,  G02F1/1333 ,  G02F1/133345 ,  G02F1/133723 ,  G02F1/13378 ,  G02F1/133788 ,  G02F1/1339 ,  G02F1/13394 ,  G02F1/136286 ,  G02F1/1368

Abstract: The present invention prevents the shaving of an alignment film caused by a columnar spacer in a liquid crystal display device of an IPS method using photo-alignment. A plinth higher than a pixel electrode is formed at a part where a columnar spacer formed over a counter substrate touches a TFT substrate. When an alignment film of a double-layered structure is applied over the pixel electrode and the plinth, the thickness of the alignment film over the plinth reduces by a leveling effect. When photo-alignment is applied in the state, a photodegraded upper alignment film over the plinth disappears and a lower alignment film having a high mechanical strength remains. As a result, it is possible to prevent the shaving of the alignment film.

公开(公告)号：US09703152B2

公开(公告)日：2017-07-11

申请号：US14458314

申请日：2014-08-13

Applicant: Japan Display Inc.

Inventor： Takeshi Sakai ,  Toshimasa Ishigaki ,  Yasushi Tomioka

IPC: G02F1/1343 ,  G02F1/1333 ,  G02F1/1362

CPC classification number: G02F1/134363 ,  G02F1/133345 ,  G02F1/136227 ,  G02F2001/134372

Abstract: In an IPS mode liquid crystal display device, a counter electrode is formed flat on a first insulating film. A second insulating film is formed in the peripheral portion of the counter electrode. A third insulating film is formed so as to cover the counter electrode and the second insulating film. A pixel electrode is formed on the third insulating film. The second and third insulating films are present between the pixel electrode and the counter electrode in the periphery of the pixel. The third insulating film is present between the pixel electrode and the counter electrode in the portion other than the peripheral portion of the pixel. An electric field between the pixel electrode and the counter electrode is smaller in the periphery of the pixel than in the vicinity of the center of the pixel, to prevent the occurrence of a domain in the periphery of the pixel.

公开(公告)号：US20150049271A1

公开(公告)日：2015-02-19

申请号：US14527858

申请日：2014-10-30

Applicant: Japan Display Inc. ,  Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Shoichi Uchino ,  Noboru Kunimatsu ,  Hidehiro Sonoda ,  Chikae Matsui ,  Yuko Matsumoto ,  Masaki Matsumori ,  Yasushi Tomioka ,  Jun Tanaka

IPC: G02F1/1337

CPC classification number: G02F1/133723 ,  B32B2457/202 ,  C08G73/1064 ,  C08G73/1078 ,  Y10T428/10 ,  Y10T428/1005 ,  Y10T428/1023

Abstract: A liquid crystal display device includes: a pair of substrates at least one of which is transparent; a liquid crystal layer disposed between the pair of substrates; an electrode group formed on at least one substrate of the pair of substrates, for applying an electric field to the liquid crystal layer; a plurality of active elements connected to the electrode group; and a liquid crystal alignment film disposed on at least one substrate of the pair of substrates, in which the liquid crystal alignment film, which is formed by a photo-alignment process, contains polyimide formed using tetracarboxylic acid dianhydride and/or diamine each having a specific chemical structure.

Abstract translation: 液晶显示装置包括：至少一个透明的一对基板; 设置在所述一对基板之间的液晶层; 形成在所述一对基板的至少一个基板上的用于向所述液晶层施加电场的电极组; 连接到所述电极组的多个有源元件; 以及设置在该对基板的至少一个基板上的液晶取向膜，其中通过光取向工艺形成的液晶取向膜含有使用四羧酸二酐和/或二胺形成的聚酰亚胺，所述四羧酸二酐和/或二胺各自具有 具体化学结构。

公开(公告)号：US08958038B2

公开(公告)日：2015-02-17

申请号：US14105518

申请日：2013-12-13

Applicant: Japan Display Inc. ,  Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Yasuo Imanishi ,  Masaki Matsumori ,  Yasushi Tomioka

IPC: G02F1/141 ,  G02F1/1337

CPC classification number: G02F1/133711 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/133723 ,  G02F1/134327

Abstract: A liquid crystal display device includes first and second substrates, at least one of which is transparent, a liquid crystal layer which is disposed between the first and second substrates, a pixel electrode and a common electrode which are formed on one of the first and second substrates and which apply an electric field to the liquid crystal layer, a plurality of active elements which is connected to the pixel electrode and the common electrode, an alignment film which is disposed on at least one of the first and second substrates and has one surface contacting the liquid crystal layer, and an underlying layer which is disposed on at least one of the first and second substrates and contacts the other surface of the alignment film. The pixel electrode is laminated on the common electrode having a plane shape through an isolation film.

公开(公告)号：US20150011032A1

公开(公告)日：2015-01-08

申请号：US14493893

申请日：2014-09-23

Applicant: Japan Display Inc. ,  Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Noboru Kunimatsu ,  Chikae Matsui ,  Hidehiro Sonoda ,  Yuko Matsumoto ,  Shoichi Uchino ,  Masaki Matsumori ,  Yasushi Tomioka

IPC: G02F1/1337

CPC classification number: G02F1/133723 ,  C09K19/56 ,  G02F1/133711 ,  G02F1/133788 ,  G02F1/134363 ,  G02F1/1368 ,  H01L27/1262 ,  H01L27/1296 ,  Y10T428/10 ,  Y10T428/1005

Abstract: A method for fabricating a liquid crystal display device including a TFT substrate having an alignment film formed thereon, an opposing substrate, and a liquid crystal layer sandwiched therebetween. The alignment film on the TFT substrate includes a photolytic polymer made from a first precursor including cyclobutane, and a non-photolytic polymer made from a second precursor. The method includes the steps of depositing a mixture material including the first precursor and the second precursor in which the second precursor settles more on an upper surface of the TFT substrate than the first precursor, imidizing the mixture material, and irradiating the mixture material with ultraviolet light for photo-alignment, and after irradiating, heating the mixture material to form the alignment film.

Abstract translation: 一种制造液晶显示装置的方法，该液晶显示装置包括其上形成有取向膜的TFT基板，相对基板和夹在其间的液晶层。 TFT基板上的取向膜包括由包含环丁烷的第一前体制成的光解聚合物和由第二前体制成的非光解聚合物。 该方法包括以下步骤：将包含第一前体和第二前体的混合材料沉积在第二前体中，其中第二前体比第一前体沉淀在TFT基板的上表面上，对混合物进行酰亚胺化，并用紫外线照射混合材料 用于光取向的光，并且在照射之后，加热混合物材料以形成取向膜。