公开(公告)号：US10473986B2

公开(公告)日：2019-11-12

申请号：US16212765

申请日：2018-12-07

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Noboru Kunimatsu ,  Yosuke Hyodo ,  Toshiki Kaneko ,  Yuko Matsumoto

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

Abstract: A liquid crystal display device includes: a TFT substrate having gate lines and data lines arranged thereon, the gate lines extending in a first direction and arranged in a second direction, the data lines extending in the second direction and arranged in the first direction; a counter substrate having a black matrix and a color filter; and liquid crystals put between the TFT substrate and the counter substrate. Columnar spacers are formed on the counter substrate. Pedestals are formed on portions of the TFT substrate, the portions corresponding to the columnar spacers. A convex portion and a concave portion are present at the top end of the columnar spacer. The pedestal is formed corresponding to the concave portion. The concave portion is opened at the ends thereof and connected to the lateral side of the columnar spacer.

公开(公告)号：US10418436B2

公开(公告)日：2019-09-17

申请号：US15977377

申请日：2018-05-11

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Hajime Yamaguchi

IPC: H01L27/32 ,  H01L51/52 ,  H01L51/00

Abstract: According to one embodiment, a display device includes an insulating substrate having a display area, a pad area and a bend area, wiring lines, a first protective film and a second protective film. The wiring lines are elongated from the display area to the pad area. The first protective film is located on the insulating substrate and the wiring lines. The second protective film is located on the first protective film and is formed of an organic insulating material different from that of the first protective film.

公开(公告)号：US10281771B2

公开(公告)日：2019-05-07

申请号：US15144973

申请日：2016-05-03

Applicant: Japan Display Inc.

Inventor： Hidehiro Sonoda ,  Noboru Kunimatsu ,  Takenori Hirota ,  Yosuke Hyodo ,  Yasuo Imanishi ,  Yasushi Tomioka

IPC: G02F1/1337 ,  G02F1/13363 ,  G02F1/1339

Abstract: In a liquid crystal display device having an alignment film subjected to an optical alignment process, the frame area can be reduced while maintaining the reliability of the sealing portion. To achieve this, in the display area, the alignment process is performed with UV light on the alignment film, to form an area in which the alignment film is not formed in the opposing first and second sides, and to form an area in which the amount of UV light irradiation on the alignment film is one fourth or less of the display area in the opposing third and fourth sides. In the first and second sides, the sealing material overlaps the area in which the alignment film is not formed. In the third and fourth sides, the sealing material overlaps the area in which the amount of UV light irradiation is one fourth or less of the display area.

公开(公告)号：US10018885B1

公开(公告)日：2018-07-10

申请号：US15901945

申请日：2018-02-22

Applicant: Japan Display Inc.

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

IPC: G02F1/1362 ,  G02F1/1337 ,  G02F1/1368 ,  G02F1/1335 ,  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：US09964816B2

公开(公告)日：2018-05-08

申请号：US15238229

申请日：2016-08-16

Applicant: Japan Display Inc.

Inventor： Yasushi Tomioka ,  Takato Hiratsuka ,  Osamu Itou

IPC: G02F1/1339 ,  G02F1/1343 ,  G02F1/1335 ,  G02F1/1333 ,  G02F1/1337 ,  H01L27/12 ,  G02F1/1362 ,  G02F1/1368

CPC classification number: G02F1/134363 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/133514 ,  G02F1/1337 ,  G02F1/13394 ,  G02F1/13439 ,  G02F1/13624 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/133302 ,  G02F2001/13398 ,  G02F2001/134345 ,  G02F2201/121 ,  G02F2201/123 ,  G02F2203/04 ,  H01L27/124

Abstract: A liquid crystal display device includes a TFT substrate, a CF substrate, and a liquid crystal interposed between the TFT substrate and the CF substrate, and drives the liquid crystal in a horizontal electric field. The TFT substrate includes a recess, and the CF substrate includes a columnar protrusion. The protrusion of the CF substrate is fitted to the recess of the TFT substrate so as to function as a stopper for preventing a positional gap between the TFT substrate and the CF substrate.

公开(公告)号：US09921429B2

公开(公告)日：2018-03-20

申请号：US15193261

申请日：2016-06-27

Applicant: Japan Display Inc.

Inventor： Shinichiro Oka ,  Toshinari Sasaki ,  Yasushi Tomioka

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1337

CPC classification number: G02F1/13363 ,  G02F1/133305 ,  G02F1/133634 ,  G02F1/133723 ,  G02F2001/133633 ,  G02F2413/02 ,  G02F2413/11

Abstract: There is provided a display device including a first base material, a second base material, an optical layer placed between the first base material and the second base material, and a first retardation layer placed in contact with the first base material, wherein the first base material and the second base material are formed from a polyimide, and the first retardation layer and the second retardation layer are liquid crystal layers which are vertically aligned. Providing the first and second retardation layers in contact with the first and second base materials make it possible to achieve a reduction in the thickness of the display device.

公开(公告)号：US09868907B2

公开(公告)日：2018-01-16

申请号：US14678381

申请日：2015-04-03

Applicant: JAPAN DISPLAY INC. ,  Panasonic Liquid Crystal Display Co., Ltd.

Inventor： Masaki Matsumori ,  Yasushi Tomioka ,  Noboru Kunimatsu

IPC: C09K19/56 ,  G02F1/13 ,  C08L33/24 ,  C08L77/06 ,  G02F1/137 ,  G02F1/1337 ,  G02F1/1343

CPC classification number: C09K19/56 ,  B32B2457/202 ,  C08L33/24 ,  C08L77/06 ,  G02F1/133723 ,  G02F1/133788 ,  G02F1/134363 ,  G02F1/137 ,  G02F2001/133749 ,  G02F2001/13706 ,  Y10T428/1005 ,  Y10T428/1018 ,  Y10T428/1023

Abstract: An IPS type liquid crystal display device superior in mass productivity and improved in image quality with a higher contrast ratio by decreasing the occurrence of defective display due to the disorder of the initial liquid crystal alignment by the liquid orientation control film and realizing stable alignment of liquid crystals comprises: a pair of substrates, at least one which is transparent; a liquid crystal layer disposed between the pair of substrates; a group of electrodes formed on at least one of the pair of substrates to apply an electric field to the liquid crystal layer; plural active elements connected to the group of electrodes; and an orientation control film disposed on at least one of the pair of substrates, wherein said orientation control film is made of a photosensitive polyimide and a polyamide acid ester and is given orientation control ability by being irradiated with substantially linearly polarized light.

公开(公告)号：US20180004023A1

公开(公告)日：2018-01-04

申请号：US15636781

申请日：2017-06-29

Applicant: Japan Display Inc.

Inventor： Tatsuya IDE ,  Daisuke Sonoda ,  Yasushi Tomioka

IPC: G02F1/1343 ,  G02F1/1335 ,  G02F1/136 ,  G02F1/1362

CPC classification number: G02F1/1343 ,  G02F1/133308 ,  G02F1/133509 ,  G02F1/133514 ,  G02F1/13452 ,  G02F1/136 ,  G02F1/136286 ,  G02F2001/133334 ,  G02F2202/22 ,  H01L51/0097 ,  H01L2251/5338 ,  Y02E10/549

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：US09785013B2

公开(公告)日：2017-10-10

申请号：US14863100

申请日：2015-09-23

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: C09K19/00 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1368 ,  H01L27/12 ,  C09K19/56

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 liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.

公开(公告)号：US09575385B2

公开(公告)日：2017-02-21

申请号：US15212873

申请日：2016-07-18

Applicant: Japan Display Inc.

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

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

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.

Abstract translation: 在液晶显示装置中，在有机钝化膜上形成公共电极，在公共电极上形成层间绝缘膜，在层间绝缘膜上形成有狭缝的像素电极，并且形成通孔 有机钝化膜和层间绝缘膜，使得像素电极通过通孔连接到TFT的源电极。 此外，贯通孔的上基板周围的锥角小于下基板周围的锥角。 因此，当通孔的直径减小时，取向膜材料可以容易地流入通孔，以连接像素和源电极，防止由于不存在取向膜或由于取向而导致的不均匀亮度的显示缺陷 围绕通孔的膜不规则。