-
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
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：US10229642B2
公开(公告)日：2019-03-12
申请号：US15609234
申请日：2017-05-31
Applicant: Japan Display Inc.
Inventor： Susumu Kimura , Fumitaka Gotoh , Naoyuki Takasaki , Tsutomu Harada
Abstract: According to an aspect, the liquid crystal display device includes: an expansion coefficient determining unit that determines an expansion coefficient of each of partial areas based on a signal level of the first, the second, and the third colors; a luminance level determining unit that determines a luminance level of each partial area based on the signal level; a signal processing unit that uses the expansion coefficient to expand the signal level; and a light source control unit that controls brightness of a light source based on the expansion coefficient and the luminance level. The light source can change the brightness of the partial areas individually. The light source control unit controls the light source such that the brightness of the light source in a partial area having a luminance level equal to or higher than a predetermined threshold is higher than the brightness based on the expansion coefficient.
-
公开(公告)号：US20190005869A1
公开(公告)日：2019-01-03
申请号：US16008548
申请日：2018-06-14
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki , Yuta Haga , Tsutomu Harada
Abstract: An image processing device includes a noise output circuit outputting noise data having an adjusted noise amplitude according to a gradation of input data, a data synthesis circuit synthesizing noise data output from the noise output circuit and the input data, and an error diffusion process circuit configured to perform an error diffusion process on data synthesized and obtained from the data synthesis circuit.
-
公开(公告)号：US10088770B2
公开(公告)日：2018-10-02
申请号：US15600825
申请日：2017-05-22
Applicant: Japan Display Inc.
Inventor： Kazunori Yamaguchi , Fumitaka Gotoh , Takayuki Nakanishi , Tsutomu Harada
IPC: G03G15/043 , H04N1/00
Abstract: According to one embodiment, an imaging display system includes an imaging device and a display device, which operate synchronously with each other. The imaging display system includes a control device. The control device is configured to measure light exposure when the imaging device captures an image and determine whether the measured light exposure is insufficient, and control the display device to decrease a refresh rate and the imaging device to prolong an exposure time, when determined that the light exposure is insufficient. The first scanning time for the imaging device to scan the image and the second scanning time required for the display device to scan the display panel are constant.
-
公开(公告)号：US10032417B2
公开(公告)日：2018-07-24
申请号：US15367091
申请日：2016-12-01
Applicant: Japan Display Inc.
Inventor： Susumu Kimura , Kazuhiko Sako , Tadafumi Ozaki , Naoyuki Takasaki , Fumitaka Gotoh , Tsutomu Harada
Abstract: According to one embodiment, a light source device includes a plurality of light emitting elements including at least first and second light emitting elements, lightguide, first circuit, second circuit, and controller. The lightguide includes a first surface on which light from light emitting elements is incident and a second surface through which the light exits. The first circuit connects light emitting elements in series. The second circuit can bypass each of light emitting elements. The controller turns on light emitting elements using the first circuit if light emitting elements function normally, and if one of light emitting elements functions abnormally, the controller turns on the light emitting element functioning normally using the second circuit.
-
Patent Agency Ranking
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
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：US20180097997A1
公开(公告)日：2018-04-05
申请号：US15819169
申请日：2017-11-21
Applicant: Japan Display Inc.
Inventor： Fumitaka Gotoh , Tsutomu Harada
Abstract: A display system includes an imaging apparatus installed on a mobile body; a display apparatus installed at a position different from that of the imaging apparatus on the mobile body and displaying a post-processing image; a first sensor detecting vibration at or near the imaging apparatus; a second sensor detecting vibration at or near the display apparatus; a first image processor clipping out a preprocessing image from an image captured by the imaging apparatus, based on the first sensor detection result; and a second image processor clipping out the post-processing image from the preprocessing image based on the second sensor detection result. The first image processor moves a clip-out region of the preprocessing image in a direction to counteract vibration at or near the imaging apparatus, and the second image processor causes a clip-out region of the post-processing image to follow vibration at or near the display apparatus.
-
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：US09804455B2
公开(公告)日：2017-10-31
申请号：US15046836
申请日：2016-02-18
Applicant: Japan Display Inc.
Inventor： Shinichiro Oka , Youichi Asakawa , Akira Sakaigawa , Tsutomu Harada
IPC: G09F13/04 , G02F1/1343 , G02F1/1335 , G02F1/1362
CPC classification number: G02F1/134363 , G02F1/133514 , G02F1/133621 , G02F1/136286 , G02F2001/133622 , G02F2001/134345
Abstract: According to one embodiment, a display device includes a first color film of a first color and a second color film of a second color, wherein the irradiator comprises a first light source of a third color and a second light source of a fourth color, the first color and the second color have a complementary color relationship, lightness of the first color is greater than lightness of the second color, a first total displayable area of the first color film is larger than a second total displayable area of the second color film, and the irradiator is configured to radiate light of the first light source and the second light source in a switching manner by time division.
-
公开(公告)号：US20170270846A1
公开(公告)日：2017-09-21
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
CPC classification number: G09G3/2059 , G09G2320/0247
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.
-
-
-
-
-
-
-
-
-
Search Results
140
records
(took 0.027 seconds)
