公开(公告)号：US12140837B2

公开(公告)日：2024-11-12

申请号：US18369005

申请日：2023-09-15

Applicant: Japan Display Inc.

Inventor： Kojiro Ikeda ,  Takeo Koito ,  Tae Kurokawa

IPC: G02F1/1337 ,  G02F1/1343

Abstract: A liquid crystal light control device includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal cell. Each of the first, second, third, and the fourth liquid crystal cells includes, a first substrate including a first alignment film, a second substrate including an electrode having a strip pattern and a second alignment film, and a liquid crystal layer between the first substrate and the second substrate. An alignment direction of the first alignment film and an alignment direction of the second alignment film are aligned to intersect each other. A longitudinal direction of the strip pattern of the electrode having the strip pattern is arranged to intersect an alignment direction of the second alignment film.

公开(公告)号：US11988924B2

公开(公告)日：2024-05-21

申请号：US17805330

申请日：2022-06-03

Applicant: Japan Display Inc.

Inventor： Tae Kurokawa ,  Takeo Koito ,  Masashi Mitsui

IPC: G02F1/1343 ,  G02F1/1333 ,  G02F1/1347

CPC classification number: G02F1/134309 ,  G02F1/133345 ,  G02F1/1347

Abstract: According to one embodiment, a light control device includes a first substrate including first to third electrodes formed in an annular shape and a fourth electrode, a second substrate, and a liquid crystal layer held between the first substrate and the second substrate. The first electrode and the second electrode are arranged in a first direction. The first electrode and the third electrode are arranged in a direction different from the first direction. The fourth electrode is adjacent to the first to third electrodes.

公开(公告)号：US11940687B2

公开(公告)日：2024-03-26

申请号：US18187321

申请日：2023-03-21

Applicant: Japan Display Inc.

Inventor： Tae Kurokawa ,  Kentaro Okuyama

IPC: G02F1/1335 ,  G02F1/1334 ,  G02F1/13357 ,  G02F1/1362 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1345

CPC classification number: G02F1/133512 ,  G02F1/1334 ,  G02F1/133553 ,  G02F1/133615 ,  G02F1/136209 ,  G02F1/136286 ,  G02F1/133345 ,  G02F1/133365 ,  G02F1/1337 ,  G02F1/134309 ,  G02F1/13452 ,  G02F2201/121 ,  G02F2201/123

Abstract: According to one embodiment, a display device includes a first substrate including a light-shielding layer and a conductive line having a first side surface and a second side surface on a side opposite to the first side surface, a second substrate opposed to the first substrate, a polymer dispersed liquid crystal layer held between the first substrate and the second substrate, and including a polymer and liquid crystal molecules, and a light-emitting element opposed to an end portion of at least one of the first substrate and the second substrate, wherein the first side surface is closer to the light-emitting element than the second side surface, and the light-shielding layer covers at least the first side surface of the conductive line.

公开(公告)号：US11719984B2

公开(公告)日：2023-08-08

申请号：US17870852

申请日：2022-07-22

Applicant: Japan Display Inc.

Inventor： Takeo Koito ,  Tae Kurokawa ,  Masashi Mitsui

IPC: G02F1/1347 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343

CPC classification number: G02F1/1347 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/13471 ,  G02F1/133345 ,  G02F1/133528

Abstract: According to one embodiment, a light control device includes a first liquid crystal cell, a second liquid crystal cell and a polarized light conversion element disposed between the first liquid crystal cell and the second liquid crystal cell. One substrate of an pair of substrates of each of the first liquid crystal cell and the second liquid crystal cell includes an insulating substrate, a plurality of first electrodes arranged along one direction on the insulating substrate and formed in a strip shape, a first inorganic insulating film covering the first electrodes and a plurality of second electrodes intersecting the first electrodes on the first inorganic insulating film and formed in a strip shape.

公开(公告)号：US10802354B2

公开(公告)日：2020-10-13

申请号：US16268204

申请日：2019-02-05

Applicant: Japan Display Inc.

Inventor： Tae Kurokawa ,  Akira Sakaigawa ,  Masaaki Kabe ,  Kojiro Ikeda ,  Amane Higashi

IPC: G02F1/1343 ,  G02F1/13357

Abstract: According to one embodiment, a display device includes a display panel, a light source, a light guide and a prism sheet. The display panel includes a display area in which unit pixels each containing first sub-pixels and second sub-pixels are arranged along a first direction and a second direction. In the display area, the first sub-pixels have a width different from that of the second sub-pixel in at least one of the first direction and the second direction, or each unit pixel contains different numbers of first sub-pixels and second sub-pixels. The prism sheet is interposed between the light guide and the display panel and includes prisms extending along a third direction inclined with respect to the second direction by an acute angle of inclination.

公开(公告)号：US10431146B2

公开(公告)日：2019-10-01

申请号：US15672699

申请日：2017-08-09

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Kazunari Tomizawa ,  Tsutomu Harada ,  Naoyuki Takasaki ,  Tae Kurokawa

IPC: G09G3/22 ,  G09G3/34 ,  G09G3/20 ,  G09G3/36

Abstract: A signal processor of a display device includes: a light emission value calculating unit that calculates a light emission value; a chunk determining unit that determines whether pixels within a predetermined luminance value range are continuously present and determines an area of the continuous pixels as a chunk; a maximum luminance value detecting unit that detects a maximum luminance value inside the chunk in one of the partial areas; a luminance gain value determining unit that determines a luminance gain value based on the maximum luminance value such that a corrected light emission value that is a value acquired by multiplying the light emission value by the luminance gain value is a value of an upper limit emission value or less; and a light emission control unit that causes the light source units to emit light based on the corrected light emission value.

公开(公告)号：US10338441B2

公开(公告)日：2019-07-02

申请号：US15474095

申请日：2017-03-30

Applicant: Japan Display Inc.

Inventor： Kentaro Okuyama ,  Tae Kurokawa

IPC: G02F1/137 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/139

Abstract: According to one embodiment, a display device includes a first polarizing element, a second polarizing element, and a light-modulating layer located between the first polarizing element and the second polarizing element, each of the first polarizing element and the second polarizing element includes a guest-host liquid crystal layer and a control electrode in an active area including at least one sub-area, the guest-host liquid crystal layer including dye having anisotropy in absorptive power for visible light, the control electrode controlling an alignment direction of the dye in the sub-area.

公开(公告)号：US09972253B2

公开(公告)日：2018-05-15

申请号：US14682520

申请日：2015-04-09

Applicant: Japan Display Inc.

Inventor： Fumitaka Gotoh ,  Tsutomu Harada ,  Toshiyuki Nagatsuma ,  Akira Sakaigawa ,  Masaaki Kabe ,  Tae Kurokawa ,  Kojiro Ikeda

IPC: G09G3/36 ,  G09G3/34

CPC classification number: G09G3/3406 ,  G09G2320/064 ,  G09G2320/0646

Abstract: Provided are a display apparatus and an illumination apparatus including: a light source; a time division control unit that performs a time division operation on a value represented by a first luminance control signal of a first bit number for controlling luminance of the light source to generate second luminance control signals each having a second bit number that is smaller than the first bit number and generates third luminance control signals each having a pulse width that corresponds to one of the values represented by the second luminance control signals; and a drive unit that generates drive signals for causing the light source to emit light on the basis of the third luminance control signals and supplies the drive signals to the light source.

公开(公告)号：US20170336676A1

公开(公告)日：2017-11-23

申请号：US15595696

申请日：2017-05-15

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Kazuhiko Sako ,  Tae Kurokawa

IPC: G02F1/1335 ,  G09G3/34 ,  G09G3/20 ,  G09G3/36

CPC classification number: G02F1/133602 ,  G09G3/2022 ,  G09G3/3413 ,  G09G3/342 ,  G09G3/3607 ,  G09G3/3666 ,  G09G2310/0232 ,  G09G2320/0238 ,  G09G2320/0285 ,  G09G2320/0646 ,  G09G2360/16

Abstract: According to an aspect, a display apparatus includes: an image display panel that displays an image thereon; a planar light source that includes a plurality of light sources and irradiates a plurality of divided areas of the image display panel with light from the back side of the image display panel; and a signal processor that drives the light sources individually based on input signals of the image to control brightness of the individual divided areas. The signal processor performs image display on the image display panel using output signals obtained by lowering brightness of a dark region in the image represented by the input signals.

公开(公告)号：US20170330530A1

公开(公告)日：2017-11-16

申请号：US15648177

申请日：2017-07-12

Applicant: Japan Display Inc.

Inventor： Kojiro Ikeda ,  Toshiyuki Nagatsuma ,  Masaaki Kabe ,  Amane Higashi ,  Tae Kurokawa ,  Fumitaka Gotoh ,  Akira Sakaigawa

IPC: G09G5/10 ,  G09G5/02 ,  G09G3/36

CPC classification number: G09G5/10 ,  G09G3/3607 ,  G09G3/3648 ,  G09G5/02 ,  G09G2300/0452 ,  G09G2340/0457 ,  G09G2340/06 ,  G09G2360/16

Abstract: A display device includes a signal processing unit that receives input signals, and calculates output signals to a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The signal processing unit calculates a frequency of pixels belonging to each of a plurality of partitions using a light quantity of a surface light source. The signal processing unit calculates an index value for each of the partitions by at least multiplying the cumulative frequency being obtained by sequentially adding the frequency of pixels from a partition having the maximum light quantity among the partitions, and the number of partitions representing a position of a partition to which the cumulative frequency belongs counted from the partition having the maximum light quantity. The signal processing unit controls luminance of the surface light source based on a partition in which the index value exceeds a threshold.