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公开(公告)号：US20170316746A1
公开(公告)日：2017-11-02
申请号：US15496447
申请日：2017-04-25
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Naoyuki Takasaki , Tsutomu Harada , Tatsuya Yata , Shigenori Aoki
CPC classification number: G09G3/3426 , G02B27/0101 , G02B2027/0118 , G09G2320/0646 , G09G2360/16
Abstract: According to an aspect, a display apparatus includes: a plurality of light sources; a display device irradiated with light from the light sources; and a controller. The display area includes a plurality of partial areas corresponding to the light sources on a one-to-one basis. Each of the partial areas includes a first area and a second area, the first area being irradiated with light from a first light source that corresponds thereto, and the second area being irradiated with light from the first light source and a second light source adjacent to the first light source. The controller controls an operation of the first light source based on whether the first area requires the light from the first light source and whether the second area obtains light required for display output by receiving the light from the second light source.
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公开(公告)号：US11948522B2
公开(公告)日：2024-04-02
申请号：US17476857
申请日：2021-09-16
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Tsutomu Harada
CPC classification number: G09G3/342 , G09G3/36 , G09G2300/0452 , G09G2320/0233 , G09G2360/16
Abstract: According to an aspect, a display device includes: an image display panel having an image display surface on which display is to be controlled based on an image signal; a light source device that includes light sources provided corresponding to divided partial areas of the image display surface, and is configured to illuminate the image display surface; and a signal processor configured to calculate a light quantity of each light source for each of the partial areas. The signal processor is configured to calculate the light quantity for each partial area based on the image signal, set one of the partial areas as an adjustment target partial area for the light quantity, and adjust the light quantity in the adjustment target partial area when the light quantity of an adjacent partial area located around the adjustment target partial area is equal to or smaller than a predetermined value.
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公开(公告)号：US11663959B2
公开(公告)日：2023-05-30
申请号：US17727058
申请日：2022-04-22
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Kazunari Tomizawa , Tsutomu Harada
IPC: G09G3/32 , G09G3/20 , G09G3/3258
CPC classification number: G09G3/32 , G09G3/2007 , G09G3/3258 , G09G2320/0271 , G09G2340/06 , G09G2360/16
Abstract: According to an aspect, a display device includes a pixel including a first sub-pixel configured to emit light having a peak in a spectrum of red, a second sub-pixel configured to emit light having a peak in a spectrum of green, and a third sub-pixel configured to emit light having a peak in a spectrum of blue. The first sub-pixel, the second sub-pixel, and the third sub-pixel are inorganic light-emitting diodes. A light emission intensity of the second sub-pixel is increased at a predetermined ratio with respect to a light emission intensity of the first sub-pixel when the first sub-pixel emits light at a light emission intensity within a low-luminance range equal to or lower than a predetermined level of luminance.
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公开(公告)号：US11175500B2
公开(公告)日：2021-11-16
申请号：US16730237
申请日：2019-12-30
Applicant: Japan Display Inc.
Inventor： Tsutomu Harada , Kazuhiko Sako
Abstract: According to one embodiment, when displaying an image on a display panel, projecting an image which is displayed on the display panel, inclining the image which is projected from the display panel at a predetermined angle of bend, and reflecting the image which is projected from the display panel via a prism and guiding the image to a projection surface, a display device corrects input picture image of the prism based on characteristics contrary to the chromatic aberration characteristics of the prism.
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公开(公告)号：US10670915B2
公开(公告)日：2020-06-02
申请号：US15892001
申请日：2018-02-08
Applicant: Japan Display Inc.
Inventor： Daichi Suzuki , Kazuhiko Sako
IPC: G09G3/36 , G02F1/1335 , G02F1/13357 , G02F1/1343 , G02F1/1347 , H05B45/10
Abstract: According to an aspect, a display device includes: a display panel including a display area with pixels; a backlight; and a dimmer. The dimmer includes a dimming panel including a dimming area overlapping the display area and a control circuit. The dimming area includes a plurality of regions each including a first electrode and a second electrode. The control circuit includes a shift register configured to receive an electrical signal for controlling a potential of each of the first electrodes and including a plurality of sequential circuits coupled in series, a holding circuit to which an output of each of the sequential circuits is coupled, and a gradation voltage setter to which an output of the holding circuit is coupled. Each of the first electrodes is coupled to an output of the gradation voltage setter.
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Patent Agency Ranking
公开(公告)号：US10591769B2
公开(公告)日：2020-03-17
申请号：US16106537
申请日：2018-08-21
Applicant: Japan Display Inc.
Inventor： Tsutomu Harada , Daichi Suzuki , Kazuhiko Sako , Naoyuki Takasaki , Kazunari Tomizawa
IPC: G09G3/36 , G02F1/13357 , G09G3/34 , F21V8/00 , G02F1/1347 , G02F1/1335
Abstract: According to an aspect, a display device includes: a display panel including a display area provided with pixels; an illuminator including an illumination area configured to emit light to the display panel such that the display area is illuminated from one surface side of the display panel; and a liquid crystal dimming panel overlapping the display panel, and including a dimming area configured to be adjusted in transmittance of the light emitted to another surface side of the display panel through the display area. The illumination area includes first segment regions configured such that luminance levels thereof are individually adjusted. The dimming area includes second segment regions configured such that the light transmittances thereof are individually adjusted. Each of the first segment regions overlaps more than one of the second segment regions. Each of the second segment regions overlaps more than one of the pixels.
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公开(公告)号：US10453376B2
公开(公告)日：2019-10-22
申请号：US15442995
申请日：2017-02-27
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki , Kazuhiko Sako , Tsutomu Harada , Naoyuki Takasaki
IPC: G09G3/20
Abstract: An image display device includes a first pixel data calculator calculating first pixel data for a pixel of attention based on a first error value for a pixel adjacent thereto in the same error diffusion block; a second pixel data calculator calculating second pixel data for the pixel of attention based on a corrected error value for the adjacent pixel; a first error value calculator calculating the first error value based on the first pixel data; a second error value calculator calculating a second error value based on the second pixel data; and a corrected error value calculator calculating the corrected error value by correcting the second error value in a direction in which the second error value approaches the first error value in accordance with whether the pixel of attention is located within a predetermined range from a border among a plurality of error diffusion blocks.
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公开(公告)号：US10437101B2
公开(公告)日：2019-10-08
申请号：US16150949
申请日：2018-10-03
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Tsutomu Harada
IPC: G02F1/13357 , G02F1/1335 , G02F1/1333 , G09G3/36 , G09G3/34
Abstract: According to an aspect, a display device includes: a display panel having a display area including a plurality of pixels; and an illuminator provided so as to overlap the display panel and configured to illuminate the display area. The illuminator has a plurality of segment blocks set in different positions in the display area. Each of the segment blocks is provided such that the luminance of the segment block is individually controlled. At least one of the segment blocks satisfies a predetermined condition. The predetermined condition is such that at least two light source rows each including a plurality of light sources arranged in a first direction are arranged in a second direction intersecting the first direction, and that none of the light sources included in the two light source rows adjacent in the second direction are in the same straight line along the second direction.
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公开(公告)号：US20180374437A1
公开(公告)日：2018-12-27
申请号：US16012131
申请日：2018-06-19
Applicant: Japan Display Inc.
Inventor： Kazunari Tomizawa , Kazuhiko Sako , Yasuo Saruhashi
IPC: G09G3/36 , G09G5/02 , H04N9/67 , G02F1/1335
CPC classification number: G09G3/3607 , G02F1/133603 , G09G3/3413 , G09G3/3426 , G09G3/3648 , G09G5/02 , G09G5/026 , G09G2300/023 , G09G2300/0452 , G09G2310/0235 , G09G2320/0646 , G09G2330/021 , G09G2340/0457 , H04N9/67
Abstract: A signal processing device includes an elongation coefficient calculation circuit receiving a first image signal including a red pixel value, a green pixel value and a blue pixel value, and determining an elongation coefficient value with respect to one frame based on the first image signal, and an image signal processing circuit receiving the first image signal and the elongation coefficient value. The image signal processing circuit includes an image signal conversion circuit converting the first image signal into a second image signal including a red pixel value, a green pixel value, a blue pixel value and a white pixel value, an elongation processing circuit elongating the second image signal based on the elongation coefficient value, an image signal analysis circuit analyzing the elongated second image signal, and an adjustment circuit adjusting the elongated second image signal.
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公开(公告)号：US10089938B2
公开(公告)日：2018-10-02
申请号：US15168890
申请日：2016-05-31
Applicant: Japan Display Inc.
Inventor： Naoyuki Takasaki , Tsutomu Harada , Kazuhiko Sako
Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate, a first sidelight light source, and a second sidelight light source; and a control unit. The control unit sets first luminance determination blocks in a first display surface of the image display panel and identifies a first luminance determination block to be a target of luminance correction by referring to luminance information on the light sources. The control unit sets second luminance determination blocks in a second display surface of the image display panel and identifies a second luminance determination block to be a target of luminance correction by referring to the luminance information on the light sources. The control unit controls light source lighting amounts of the respective light sources to satisfy luminance of the identified first luminance determination block and the identified second luminance determination block.
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