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公开(公告)号：US20180096658A1
公开(公告)日：2018-04-05
申请号：US15720328
申请日：2017-09-29
Applicant: Japan Display Inc.
Inventor： Kazuhiko SAKO
Abstract: According to an aspect, a display apparatus includes a segment necessary luminance calculator, a segment necessary luminance corrector, and a light emission amount calculator. The segment necessary luminance calculator creates segment necessary luminance data indicating the luminance necessary for each of light-emitting segments in accordance with image data. The segment necessary luminance corrector corrects the segment necessary luminance data for each of light-emitting blocks according to the highest luminance of one or a plurality of light-emitting segments included in each light-emitting block, in accordance with control data for dividing a light-emitting region and a display region into a plurality of blocks and the segment necessary luminance data. The light emission amount calculator calculates the amount of light emission from the light-emitting segments in accordance with the segment necessary luminance data corrected by the segment necessary luminance corrector and outputs a light emission amount control signal to the light emitter.
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22.发明申请公开(公告)号：US20160300522A1
公开(公告)日：2016-10-13
申请号：US15084523
申请日：2016-03-30
Applicant: Japan Display Inc.
Inventor： Naoyuki TAKASAKI , Kazuhiko SAKO , Tsutomu HARADA
IPC: G09G3/20
CPC classification number: G09G3/342 , G09G2320/0285 , G09G2320/0646 , G09G2330/023 , G09G2360/16
Abstract: The signal processing unit 20 includes a pixel index value calculating unit that calculates a pixel index value based on an input signal for each pixel 48, a chunk determining unit that performs consecutiveness determination which determines whether or not a pixel 48, having a pixel index value between an upper boundary value and a lower boundary value is consecutive from the starting pixel, and determines consecutive pixels as a chunk, a chunk index value calculating unit that calculates a chunk index value, a region index value calculating unit that calculates a region index value of a target region, and a light irradiation amount deciding unit that compares the chunk index value with the region index value, and decides the irradiation amount of the light of the light source unit in the target region based on the one by which the irradiation amount of the light is increased.
Abstract translation: 信号处理单元20包括：像素指标值计算单元，其基于每个像素48的输入信号计算像素索引值;块确定单元，执行连续性确定，其确定具有像素索引值的像素48 在上边界值和下边界值之间，从起始像素连续起来，并且确定连续像素作为块，计算块指数值的块指数值计算单元，计算区域索引值的区域索引值计算单元 以及光照射量决定单元，其将块指标值与区域指标值进行比较，并且基于照射量决定目标区域中的光源单元的光的照射量 的光增加了。
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公开(公告)号：US20250159382A1
公开(公告)日：2025-05-15
申请号：US18939767
申请日：2024-11-07
Applicant: Japan Display Inc.
Inventor： Kazuhiko SAKO , Kazunari TOMIZAWA
Abstract: According to an aspect, an imaging system includes: a display device that includes a display panel on which a plurality of pixels are arranged in a first direction and a second direction intersecting the first direction and a light source configured to emit light to a side surface of the display panel; and an imaging device that is provided with the display panel interposed between the imaging device and a subject and is configured to capture an image of the subject transmitted through the display panel. The display device is configured to have: a first period in which pixel data is written to the pixels; and a second period in which the light source emits the light after the first period. The imaging device is configured to generate imaged data of the subject using exposure data acquired during the first period.
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公开(公告)号：US20240259704A1
公开(公告)日：2024-08-01
申请号：US18425111
申请日：2024-01-29
Applicant: Japan Display Inc.
Inventor： Kazuhiko SAKO
IPC: H04N25/531 , G09G3/36 , H04N7/18
CPC classification number: H04N25/531 , G09G3/3648 , H04N7/183 , G09G2320/0666
Abstract: According to one embodiment, a display system includes a display device, a rolling shutter camera, a shutter and a control device. The display device includes a display area and a light emitting element. The rolling shutter camera is arranged behind the display device. The shutter is arranged between the display device and the camera. The control device controls the operation of the shutter to block light traveling toward the camera during a first sub-frame period during which the light emitting element is turned on and an image is displayed on the display area, and to transmit light traveling toward the camera during a second sub-frame period during which the light emitting elements is not turned on and the display area is made transparent.
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Patent Agency Ranking
公开(公告)号：US20220005420A1
公开(公告)日：2022-01-06
申请号：US17476857
申请日：2021-09-16
Applicant: Japan Display Inc.
Inventor： Kazuhiko SAKO , Tsutomu HARADA
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：US20210390925A1
公开(公告)日：2021-12-16
申请号：US17343074
申请日：2021-06-09
Applicant: Japan Display Inc.
Inventor： Tomoyuki ISHIHARA , Kazuhiko SAKO
IPC: G09G5/10 , G09G3/3275
Abstract: According to an aspect, a display device includes: a display panel that has a display area in which a plurality of pixels are arranged; a light source configured to illuminate the display area; a first control circuit configured to receive first signals corresponding to a first partial image to be displayed in a portion of the display area; and a second control circuit configured to receive second signals corresponding to a second partial image to be displayed in another portion of the display area. The light source has a plurality of light-emitting areas in each of which a light emission intensity is individually controllable. The first control circuit is configured to transmit lighting quantity information indicating the light emission intensity of each of the light-emitting areas to the second control circuit.
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公开(公告)号：US20210390919A1
公开(公告)日：2021-12-16
申请号：US17342783
申请日：2021-06-09
Applicant: Japan Display Inc.
Inventor： Tomoyuki ISHIHARA , Kazuhiko SAKO
IPC: G09G3/36
Abstract: A liquid crystal display device includes: a liquid crystal panel having pixels with a first electrode and a second electrode; a control circuit; and a counter. The number and an arrangement of pixels where a potential of the second electrode is higher than that of the first electrode in a first mode equal the number and an arrangement of pixels where the potential of the first electrode is higher than that of the second electrode in a second mode. The counter increases a count while the panel operates in the first mode, and decreases the count while the panel operates in the second mode. The control circuit operates the panel in the first mode when the count at a determination timing is not greater than a first threshold, and operates the panel in the second mode when the count at the determination timing is not less than a second threshold.
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公开(公告)号：US20180301116A1
公开(公告)日：2018-10-18
申请号：US15951783
申请日：2018-04-12
Applicant: Japan Display Inc.
Inventor： Tsutomu HARADA , Kazuhiko SAKO
CPC classification number: G09G5/10 , G02B6/0068 , G09G3/2003 , G09G3/3413 , G09G3/3426 , G09G5/06 , G09G2320/0285 , G09G2320/0666 , G09G2320/0673 , G09G2340/16
Abstract: A display device includes: a first controller that outputs an output image signal having the same resolution as that of pixels to an image display panel; and a second controller that transmits an input image signal to the first controller, generates second luminance distribution data divided into regions at a second density lower than a first density equal to the resolution, and transmits the second luminance distribution data to the first controller. The second controller generates first luminance distribution data divided into regions at a third density lower than the second density, controls an illuminator based on the first luminance distribution data, and generates the second luminance distribution data by applying a polynomial interpolation to the first luminance distribution data. The first controller generates third luminance distribution data having the resolution, and generates the output image signal by adjusting the input image signal based on the third luminance distribution data.
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公开(公告)号：US20180166002A1
公开(公告)日：2018-06-14
申请号：US15839146
申请日：2017-12-12
Applicant: Japan Display Inc.
Inventor： Kazuhiko SAKO , Tsutomu HARADA
CPC classification number: G09G3/2003 , G02F1/133 , G09G3/2074 , G09G3/3413 , G09G3/3426 , G09G3/36 , G09G3/3607 , G09G2310/0243 , G09G2310/0264
Abstract: A display device includes: an image display panel having a display area; a light source device configured to illuminate the image display panel with light sources; and a controller configured to control a lighting amount of each light source. The display area includes segment areas each illuminated by one or more of the light sources. Each segment area includes subsegment areas. The controller is configured to: calculate luminance required for each subsegment area, based on an image signal for each subsegment area; temporarily set luminance values of the respective segment areas for determining the lighting amounts of the light sources based on maximum luminance among the required luminance values of the respective subsegment areas of each segment area; and reset, based on at least the maximum luminance, the luminance value of at least the segment area adjacent to the corresponding subsegment area having the required luminance of the maximum luminance.
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