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公开(公告)号：US10477169B2
公开(公告)日：2019-11-12
申请号：US16225736
申请日：2018-12-19
Applicant: Japan Display Inc.
Inventor： Tatsuya Yata , Naoyuki Takasaki
Abstract: According to one embodiment, a display device includes an optical modulation element configured to emit image light corresponding to an image by using illumination light from an illumination device, a polarization control element configured to emit first polarized light, and second polarized light on the basis of the image light receiving from the optical modulation element, a polarization separation element configured to transmit the first polarized light as transmitted light and reflect the second polarized light as reflected light, and a projector configured to project the transmitted light onto a first projection area of a projection plane, and projects reflected light onto a second projection area of the projection plane.
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公开(公告)号：US10269313B2
公开(公告)日：2019-04-23
申请号：US15492640
申请日：2017-04-20
Applicant: Japan Display Inc.
Inventor： Tsutomu Harada , Naoyuki Takasaki , Akira Sakaigawa , Amane Higashi
Abstract: In a display device, pixels each including first to fourth subpixels that respectively display first to third primary colors and fourth color are arranged on an image display panel. A lighting unit emits light to the panel from the rear thereof. A control unit calculates a required luminance value for each block of the display surface of the panel based on an input image signal, determines a light source lighting amount of the lighting unit based on luminance distribution information on the lighting unit so as to satisfy the required luminance value, generates luminance information on each pixel based on the luminance distribution information and light source lighting amount, generates an output image signal that drives the subpixels based on the luminance information and input image signal, controls the lighting unit by the light source lighting amount, and controls the panel by the output image signal.
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公开(公告)号：US10140933B2
公开(公告)日：2018-11-27
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
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：US20180120562A1
公开(公告)日：2018-05-03
申请号：US15797717
申请日：2017-10-30
Applicant: Japan Display Inc.
Inventor： Tatsuya Yata , Naoyuki Takasaki
IPC: G02B27/01 , G02F1/137 , G02F1/1368 , G02B5/30 , G02B27/28 , G02F1/01 , G02F1/1335 , G03B21/28 , G09G3/34
CPC classification number: G02B27/0101 , G02B5/3083 , G02B27/283 , G02B2027/0118 , G02B2027/014 , G02F1/0136 , G02F1/133528 , G02F1/1368 , G02F1/137 , G03B21/28 , G09G3/002 , G09G3/3406 , G09G2320/041 , G09G2320/0646 , G09G2320/0686 , G09G2330/045 , G09G2380/10
Abstract: According to one embodiment, a display device includes a polarization separation element which transmits first polarized light, and reflects second polarized light, a first optical modulation unit which displays a first image by using transmitted light, a second optical modulation unit which displays a second image by using reflected light, and a projector which projects the first image onto a first projection area of a projection plane, and projects the second image onto a second projection area different from the first projection area of the projection plane.
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公开(公告)号：US09898973B2
公开(公告)日：2018-02-20
申请号：US15084523
申请日：2016-03-30
Applicant: Japan Display Inc.
Inventor： Naoyuki Takasaki , Kazuhiko Sako , Tsutomu Harada
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.
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Patent Agency Ranking
公开(公告)号：US09830867B2
公开(公告)日：2017-11-28
申请号：US14697820
申请日：2015-04-28
Applicant: Japan Display Inc.
Inventor： Naoyuki Takasaki , Tsutomu Harada , Susumu Kimura
IPC: G09G3/34
CPC classification number: G09G3/3426 , G09G3/3413 , G09G2320/062 , G09G2320/0626 , G09G2320/0646 , G09G2360/16
Abstract: A display device includes an image display panel whose display is controlled by an image signal, a backlight which includes light sources and lights the image display panel from behind, and a display control section which calculates, based on the image signal, the required luminance value of the backlight for each divided area of the image display panel, calculates a tentative lighting level of each light source based on luminance distribution information for the backlight stored previously and the required luminance values, sets the lighting level of a first light source whose tentative lighting level exceeds an upper limit to the upper limit, determines the lighting level of a second light source whose tentative lighting level does not exceed the upper limit, based on the lighting level of the first light source, luminance distribution information, and required luminance value, and controls the backlight by the lighting levels.
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公开(公告)号：US20170263199A1
公开(公告)日：2017-09-14
申请号：US15609234
申请日：2017-05-31
Applicant: Japan Display Inc.
Inventor： Susumu Kimura , Fumitaka Gotoh , Naoyuki Takasaki , Tsutomu Harada
IPC: G09G3/36
CPC classification number: G09G3/3607 , G09G3/3426 , G09G2300/0452 , G09G2320/0276 , G09G2320/0646 , G09G2340/06 , G09G2360/16
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.
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公开(公告)号：US09754541B2
公开(公告)日：2017-09-05
申请号：US14731038
申请日：2015-06-04
Applicant: Japan Display Inc.
Inventor： Naoyuki Takasaki , Tsutomu Harada , Fumitaka Gotoh
CPC classification number: G09G3/342 , G09G3/2096 , G09G3/3607 , G09G2300/0452 , G09G2320/064 , G09G2320/0646 , G09G2320/103 , G09G2340/06 , G09G2360/16
Abstract: A display device includes an image display panel section which displays an image on the basis of an image signal, a light source section which emits light to the image display panel section by dimming control according to a control signal based on the image signal, and a control section which determines on the basis of the image signal from a mode of change in light emission luminance of the light source section whether the image displayed by the image display panel section is a dynamic image or a static image and which performs switching according to a determination result between a static image control speed and a dynamic image control speed of the dimming control. The display device suppresses image quality degradation caused at the time of displaying a dynamic image or a static image.
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公开(公告)号：US09704426B2
公开(公告)日：2017-07-11
申请号：US14705420
申请日：2015-05-06
Applicant: Japan Display Inc.
Inventor： Tsutomu Harada , Naoyuki Takasaki , Toshiyuki Nagatsuma , Hirokazu Tatsuno
CPC classification number: G09G3/2003 , G09G3/3406 , G09G3/36 , G09G2300/0452 , G09G2320/064 , G09G2320/0646 , G09G2320/0673 , G09G2360/16
Abstract: A display device includes a first processing circuit mounted on a substrate separate from a translucent substrate constituting a display panel, and a second processing circuit mounted on the translucent substrate. The first and the second processing circuits receive the same image data. The first processing circuit includes a determination unit that uses color values of a plurality of pixels constituting an image based on the image data to determine an expansion coefficient value serving as a value for improving luminance of the image, and outputs the expansion coefficient value to the second processing circuit. The second processing circuit includes an expansion processing unit that uses the expansion coefficient value to provide expansion processing for improving the luminance of the image for the image based on the image data.
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公开(公告)号：US09214118B2
公开(公告)日：2015-12-15
申请号：US14505145
申请日：2014-10-02
Applicant: Japan Display Inc.
Inventor： Fumitaka Gotoh , Tsutomu Harada , Masaaki Kabe , Tae Kurokawa , Kojiro Ikeda , Toshiyuki Nagatsuma , Akira Sakaigawa , Naoyuki Takasaki , Amane Higashi
CPC classification number: G09G3/3607 , G09G5/10 , G09G2300/0452
Abstract: A display device includes: an image display unit that includes a plurality of main pixels in an image display region, the image display unit including sub-pixels; a light source that irradiates the image display region; a light source control unit that controls luminance of the light source; and a color information correction processing unit that corrects first color information that is obtained based on the luminance of the light source and an input video signal to second color information, when color information of at least one of a red pixel, a green pixel, and a blue pixel included in the first color information exceeds a predetermined threshold, the second information is corrected by degenerating color information of the red pixel, the green pixel, and the blue pixel, and by adding color information of the white pixel included in the first color information based on the degenerated color information.
Abstract translation: 显示装置包括：图像显示单元，其包括图像显示区域中的多个主要像素，所述图像显示单元包括子像素; 照射图像显示区域的光源; 光源控制单元，其控制所述光源的亮度; 以及颜色信息校正处理单元，当将红色像素，绿色像素以及绿色像素中的至少一种的颜色信息作为颜色信息时，将基于光源的亮度和输入视频信号的亮度获得的第一颜色信息校正为第二颜色信息 包括在第一颜色信息中的蓝色像素超过预定阈值，通过对红色像素，绿色像素和蓝色像素的颜色信息进行退化来校正第二信息，并且通过将包括在第一颜色信息中的第一颜色信息中的白色像素的颜色信息相加 基于退化颜色信息的颜色信息。
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