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：US10197860B2

公开(公告)日：2019-02-05

申请号：US15719706

申请日：2017-09-29

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

Inventor： Hidehiro Sonoda ,  Chikae Matsui ,  Noboru Kunimatsu

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

Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2

公开(公告)号：US20180292722A1

公开(公告)日：2018-10-11

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

CPC classification number: G02F1/136227 ,  G02F1/133345 ,  G02F1/133512 ,  G02F1/1337 ,  G02F1/133707 ,  G02F1/1368 ,  G02F2001/133357 ,  G02F2201/121 ,  G02F2201/123

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：US10031382B2

公开(公告)日：2018-07-24

申请号：US15389941

申请日：2016-12-23

Applicant: Japan Display Inc.

Inventor： Daiichi Suzuki ,  Yoshifumi Saeki ,  Yukio Tanaka ,  Noboru Kunimatsu ,  Hidehiro Sonoda ,  Masahiro Kosuge

IPC: G02F1/1343 ,  G02F1/133 ,  G02F1/1337

Abstract: According to one embodiment, a liquid crystal display device includes a liquid crystal display panel which includes a pixel electrode, a liquid crystal layer and an alignment film, and a driver. The driver drives the pixel electrode at a drive frequency of 1 to 20 Hz. The alignment film has a resistivity of 5×1014 Ω·cm or more.

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：US09804445B2

公开(公告)日：2017-10-31

申请号：US15360595

申请日：2016-11-23

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

Inventor： Hidehiro Sonoda ,  Chikae Matsui ,  Noboru Kunimatsu

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

CPC classification number: G02F1/133711 ,  G02F1/133345 ,  G02F1/133514 ,  G02F1/1337 ,  G02F1/133719 ,  G02F1/133723 ,  G02F1/133788 ,  G02F1/1339 ,  G02F1/13394 ,  G02F1/134309 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/133519 ,  G02F2201/121 ,  G02F2201/123

Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (1) and (2): 0 nm

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：US20170285388A1

公开(公告)日：2017-10-05

申请号：US15625060

申请日：2017-06-16

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

Inventor： Hidehiro Sonoda ,  Chikae Matsui ,  Noboru Kunimatsu

IPC: G02F1/1339

CPC classification number: G02F1/13394 ,  G02F1/133305 ,  G02F1/133345 ,  G02F1/1337 ,  G02F1/134363 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13398

Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.

公开(公告)号：US09720288B2

公开(公告)日：2017-08-01

申请号：US14592517

申请日：2015-01-08

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

Inventor： Hidehiro Sonoda ,  Chikae Matsui ,  Noboru Kunimatsu

IPC: G02F1/1339 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/1368

CPC classification number: G02F1/13394 ,  G02F1/133305 ,  G02F1/133345 ,  G02F1/1337 ,  G02F1/134363 ,  G02F1/13439 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13398

Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.

公开(公告)号：US09715146B2

公开(公告)日：2017-07-25

申请号：US14986449

申请日：2015-12-31

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

Inventor： Hidehiro Sonoda ,  Noboru Kunimatsu ,  Chikae Matsui ,  Takashi Yamamoto

IPC: G02F1/1339 ,  G02F1/1337 ,  G02F1/1335 ,  G02F1/1368

CPC classification number: G02F1/1339 ,  G02F1/1337 ,  G02F1/133788 ,  G02F1/1368 ,  G02F2001/133519

Abstract: An IPS system liquid crystal display device is provided to prevent reliability for a seal portion from lowering, which is caused by the fact that an overcoat film at a portion where an alignment film is not present is deteriorated by ultraviolet light during optical alignment process. An alignment film 113 subjected to optical alignment is formed above each surface of a TFT substrate 100 and of a counter substrate 200, the alignment film 113 on the side of the TFT substrate 100 is not formed in the seal portion, and a sealant 150 is bonded to an inorganic insulating film 109. On the side of the counter substrate 200, the alignment film 113 is formed on an overcoat film 203 and the sealant 150 is bonded to the alignment film 113. Since the ultraviolet light is not radiated directly to the overcoat film 203 when optical alignment is performed on the alignment film 113, the overcoat film 203 can be prevented from deterioration and, accordingly, intrusion of moisture from the deteriorated portion of the overcoat film can be prevented.