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公开(公告)号：US10438547B2
公开(公告)日：2019-10-08
申请号：US15371571
申请日：2016-12-07
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki
Abstract: A display device includes a display panel and a processor. The panel has pixels including first to fourth sub-pixels. The processor determines candidates for an expansion coefficient of pixels when displaying an image of one frame, determines the coefficient for the one frame, based on each candidate, calculates the output values of a pixel, based on the coefficient and the input values of the pixel, and outputs the output values to the panel. The processor calculates a candidate for the coefficient in the second frame of a pixel, when the input values of this pixel are not substantially the same between first and second frames, and calculates no candidate for the coefficient when the input values of the pixel are substantially the same between the first and second frames.
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公开(公告)号：US12051383B2
公开(公告)日：2024-07-30
申请号：US17745090
申请日：2022-05-16
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki , Tsutomu Harada
IPC: G09G3/36 , G02F1/1334
CPC classification number: G09G3/3607 , G02F1/1334 , G09G3/3677 , G09G2310/08
Abstract: According to an aspect, a display device includes: a display panel including a display area provided with a plurality of pixels; and a light source configured to emit light to the display panel. Writing periods and lighting periods are alternately provided in one frame period for at least one color. Each writing period is a period in which part of a pixel signal is written to a corresponding one of the pixels. Each lighting period is a period in which light is emitted to the pixel after a corresponding one of the writing periods. A light amount in at least one of the lighting periods is larger than a light amount in other lighting periods.
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公开(公告)号：US11735132B2
公开(公告)日：2023-08-22
申请号：US17552679
申请日：2021-12-16
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki , Tsutomu Harada
CPC classification number: G09G3/3648 , G02F1/133 , G09G3/2003 , G09G2310/08
Abstract: A display device includes: a display panel to display a frame image by arranging line images; and a light source. One frame period includes sub-frame periods each including a writing period and a display period. The line images are written in units of a predetermined number of lines during the writing period. The line images that are written at a time in units of the predetermined number of lines are the same image. In two continuous sub-frame periods in the one frame period, when a line image to be written during the writing period in a preceding sub-frame period differs from a line image to be written during the writing period in a subsequent sub-frame period, a start position of the writing period in the preceding sub-frame period and a start position of the writing period in the subsequent sub-frame period are shifted by one line from each other.
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公开(公告)号：US11289032B2
公开(公告)日：2022-03-29
申请号：US16922211
申请日：2020-07-07
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki
Abstract: A display device includes: a display panel including pixel rows to which line images are written; and a red, a green, and a blue light source. A display period of a frame image includes six subframe periods, each including a writing period and a lighting period. The line image of a color component corresponding to a combination of light emitted during the lighting period of a preceding period of two consecutive subframe periods, and light emitted during the lighting period of a subsequent period is written during the writing period of the preceding period. The subframe periods includes a first and a second subframe period provided alternately and consecutively, the first subframe period includes the writing period during which the line image is written to a first pixel row, and the second subframe period includes the writing period during which the line image is written to a second pixel row.
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公开(公告)号：US10777117B2
公开(公告)日：2020-09-15
申请号：US16010893
申请日：2018-06-18
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki
Abstract: An image processing device including a storage part storing an error value corresponding to at least one of second pixels in an image display device, the image display device having a display screen, the display screen having a plurality of pixels, the plurality of pixels having a first pixel and the second pixels, the second pixels surrounding a first pixel, a pixel data calculating pixel data corresponding to the first pixel based on a coefficient in response to a gradation of input data in the second pixel and the error value corresponding to the second pixel, a quantized data calculator quantizing the calculated pixel data and calculating quantized data, and an error value calculator corresponding the calculated pixel data and an error value with the quantized data and storing in the storage part.
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Patent Agency Ranking
公开(公告)号：US20190130860A1
公开(公告)日：2019-05-02
申请号：US16162908
申请日：2018-10-17
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki
IPC: G09G3/36 , G02F1/1343
Abstract: A display device including applying a positive polarity first voltage with respect to the plurality of first electrodes to the plurality of second electrodes, and applying a voltage according to an image signal to one of the plurality of first electrodes in a first time period, applying a negative polarity second voltage with respect to the plurality of first electrodes to the plurality of second electrodes, and applying a voltage according to an image signal to one of the plurality of first electrodes in a second time period, and applying to the plurality of first electrodes a common voltage larger than a minimum value of an allowable range of a voltage according to an image signal applied to one of the plurality of first electrodes and determined in a range equal to or less than the first voltage in a third time period.
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公开(公告)号：US11631366B2
公开(公告)日：2023-04-18
申请号：US17560398
申请日：2021-12-23
Applicant: Japan Display Inc.
Inventor： Tadafumi Ozaki
IPC: G09G3/32
Abstract: According to one embodiment, a display device includes pixels, gate lines, source lines, a first driver, and a second driver selecting a gradation voltage corresponding to a gradation value of input image data from either of a plurality of gradation voltages of a first system and gradation voltages of a second system, and supplying the selected gradation voltage to the corresponding source line of the plurality of source lines. In at least a gradation region of all gradation regions of the image data, a value of the corresponding gradation voltage of the second system is relatively different from a value of the corresponding gradation voltage of the first system, for each of same gradation values.
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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.
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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.
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公开(公告)号：US11935881B2
公开(公告)日：2024-03-19
申请号：US17103341
申请日：2020-11-24
Applicant: Japan Display Inc.
Inventor： Masanobu Ikeda , Yasuhiro Kanaya , Tadafumi Ozaki
CPC classification number: H01L25/167 , G06F3/04166 , G06F3/044 , G09G3/32 , G09G2300/0809 , H01L33/60 , H01L33/62
Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixels arrayed on the substrate; a plurality of inorganic light-emitting elements that are provided in the pixels, respectively; a transistor provided to a first surface of the substrate and coupled to one of the inorganic light-emitting elements; wiring provided to the first surface of the substrate and coupled to the transistor; and a circular polarization plate provided on a first side of the substrate.
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