公开(公告)号：US20200150484A1

公开(公告)日：2020-05-14

申请号：US16735388

申请日：2020-01-06

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

Inventor： Hideo TANABE ,  Masaru TAKABATAKE ,  Toshiki KANEKO ,  Atsushi HASEGAWA ,  Hiroko SEHATA

IPC: G02F1/1333 ,  G02F1/1362 ,  G02F1/1368 ,  H01L27/12 ,  H01L29/786

Abstract: A LCD device having a large pixel holding capacitance includes opposedly facing first and second substrates, and liquid crystal between them. The first substrate includes a video signal line, a pixel electrode, a thin film transistor having a first electrode connected to the video signal line and a second electrode connected to the pixel electrode, a first silicon nitride film formed above the second electrode, an organic insulation film above the first silicon nitride film, a capacitance electrode above the organic insulation film, and a second silicon nitride film above the capacitance electrode and below the pixel electrode. A contact hole etched in both the first and second silicon nitride films connects the second electrode and the pixel electrode to each other. A holding capacitance is formed by the pixel electrode, the second silicon nitride film and the capacitance electrode.

公开(公告)号：US20190179201A1

公开(公告)日：2019-06-13

申请号：US16239932

申请日：2019-01-04

Applicant: Japan Display Inc.

Inventor： Noboru KUNIMATSU ,  Masaki MATSUMORI ,  Hidehiro SONODA ,  Yasushi TOMIOKA ,  Toshiki KANEKO

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

CPC classification number: G02F1/133723 ,  G02F1/1333 ,  G02F1/133345 ,  G02F1/1337 ,  G02F1/13378 ,  G02F1/133788 ,  G02F1/1339 ,  G02F1/13394 ,  G02F1/134363 ,  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：US20190107746A1

公开(公告)日：2019-04-11

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

CPC classification number: G02F1/13394 ,  G02F1/1339 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13396 ,  G02F2001/13398

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：US20180081212A1

公开(公告)日：2018-03-22

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 ,  G02F1/1368 ,  G02F1/1362 ,  G02F1/1339 ,  G02F1/1333

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：US20170322442A1

公开(公告)日：2017-11-09

申请号：US15660254

申请日：2017-07-26

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Noboru KUNIMATSU ,  Yosuke HYODO ,  Toshiki KANEKO ,  Yuko MATSUMOTO

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

CPC classification number: G02F1/13394 ,  G02F1/1339 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13396 ,  G02F2001/13398

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 fainted 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：US20160097947A1

公开(公告)日：2016-04-07

申请号：US14968042

申请日：2015-12-14

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Noboru KUNIMATSU ,  Yosuke HYODO ,  Toshiki KANEKO ,  Yuko MATSUMOTO

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

CPC classification number: G02F1/13394 ,  G02F1/1339 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/13396 ,  G02F2001/13398

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：US20160033829A1

公开(公告)日：2016-02-04

申请号：US14811904

申请日：2015-07-29

Applicant: Japan Display Inc.

Inventor： Toshiki KANEKO ,  Takashi NAKAMURA ,  Masahiro TADA ,  Yukio TANAKA ,  Hiroyuki KIMURA ,  Osamu ITOU

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

CPC classification number: G02F1/133345 ,  G02F1/134336 ,  G02F1/134363 ,  G02F1/13439 ,  G02F1/1362 ,  G02F1/136286 ,  G02F1/1368 ,  G02F2001/133397 ,  G02F2201/121 ,  G02F2201/123 ,  G02F2201/40 ,  G02F2202/42 ,  G09G3/3648 ,  G09G2300/0465 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2330/023

Abstract: There is provided a high-definition liquid crystal display device that can prevent flicker due to a reduction in the pixel potential in a low-frequency drive of about 10 Hz to reduce power consumption. The pixel has a TFT formed of Poly-Si as a switching element. In the pixel, a capacitance insulating film is formed on a planar first electrode on which a comb-shaped second electrode is formed. When the film thickness of the insulating film is d and the dielectric constant at 10 Hz frequency is ∈, it is given that ∈d≧5×10−6 m at 10 Hz frequency. The capacitance insulating film does not have a hysteresis characteristic. The refractive index of the capacitance insulating film with respect to a light of a wavelength of 632.8 nm is 1.7 to 2.0.

Abstract translation: 提供了一种高分辨率液晶显示装置，其可以防止由于在约10Hz的低频驱动中的像素电位的降低而导致的闪烁，从而降低功耗。 该像素具有由多晶硅作为开关元件形成的TFT。 在像素中，在其上形成有梳状第二电极的平面第一电极上形成电容绝缘膜。 当绝缘膜的膜厚为d，10Hz频率下的介电常数为∈时，10Hz频率下的εd≥5×10-6m。 电容绝缘膜不具有滞后特性。 电容绝缘膜相对于632.8nm波长的光的折射率为1.7〜2.0。

公开(公告)号：US20150070641A1

公开(公告)日：2015-03-12

申请号：US14480804

申请日：2014-09-09

Applicant: Japan Display Inc.

Inventor： Norihiro UEMURA ,  Hidekazu MIYAKE ,  Isao SUZUMURA ,  Yohei YAMAGUCHI ,  Toshiki KANEKO

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

CPC classification number: G02F1/133788 ,  G02F1/136209 ,  G02F2001/133388

Abstract: To maintain good operation of a peripheral circuit using an oxide thin film transistor in a liquid crystal display panel to which photo alignment is applied, the liquid crystal display panel includes: a transparent substrate provided with an oxide thin film transistor in the periphery of a pixel portion in which pixel electrodes are arranged, to control the pixel electrodes; and an alignment film to align liquid crystal provided in the pixel portion. The alignment film is subjected to photo alignment treatment by ultraviolet irradiation. Further, an ultraviolet absorbing layer is provided so as to cover the oxide thin film transistor. For example, an alignment film is used for the ultraviolet absorbing layer to absorb the ultraviolet light for the photo aliment treatment of the alignment film, in the peripheral circuit portion for controlling the pixel electrodes, thereby preventing the threshold voltage of the oxide thin film transistor from shifting.

Abstract translation: 为了在使用光取向的液晶显示面板中使用氧化物薄膜晶体管来维持外围电路的良好的操作，液晶显示面板包括：透明基板，在像素的周边设置有氧化物薄膜晶体管 配置像素电极的部分，以控制像素电极; 以及用于对准设置在像素部分中的液晶的取向膜。 通过紫外线照射对取向膜进行光取向处理。 此外，设置紫外线吸收层以覆盖氧化物薄膜晶体管。 例如，在用于控制像素电极的外围电路部分中，使用取向膜用于紫外线吸收层吸收用于对准膜的光电解处理的紫外光，从而防止氧化物薄膜晶体管的阈值电压 从转移。