-
公开(公告)号：US12106703B2
公开(公告)日：2024-10-01
申请号：US18137817
申请日：2023-04-21
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.
-
公开(公告)号：US11620964B2
公开(公告)日：2023-04-04
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.
-
公开(公告)号：US10699652B2
公开(公告)日：2020-06-30
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 , G02F1/13357 , H04N9/67 , G09G3/34
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.
-
公开(公告)号：US10475366B2
公开(公告)日：2019-11-12
申请号：US15839146
申请日：2017-12-12
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Tsutomu Harada
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.
-
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.
-
Patent Agency Ranking
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.
-
公开(公告)号：US12183265B2
公开(公告)日：2024-12-31
申请号：US18241575
申请日：2023-09-01
Applicant: Japan Display Inc.
Inventor： Kazunari Tomizawa , Kazuhiko Sako , Tsutomu Harada
IPC: G09G3/32
Abstract: A display device includes a plurality of light-emitting elements, and a control circuit configured to control drive of the light-emitting elements. The control circuit divides one frame period into a plurality of subframe periods having different lengths and controls light emission and non-emission of the light-emitting elements for each of the subframe periods.
-
公开(公告)号：US11749214B2
公开(公告)日：2023-09-05
申请号：US17208682
申请日：2021-03-22
Applicant: Japan Display Inc.
Inventor： Kazuhiko Sako , Tsutomu Harada , Naoyuki Takasaki , Toshiyuki Nagatsuma
CPC classification number: G09G3/3406 , G09G3/2003 , G09G3/2074 , G09G3/3426 , G09G3/3607 , G09G3/3648 , G09G2300/0452 , G09G2310/08 , G09G2320/0233 , G09G2320/0238 , G09G2320/0646 , G09G2320/0653 , G09G2360/16
Abstract: A display device is provided and includes display panel comprising plurality of pixels; and light source device configured to emit light that illuminates display panel, wherein display panel is configured to control operation of light source device, display panel does not lower luminance of light for second predetermined time or longer after display panel has raised luminance of light by predetermined amount of luminance change or more within first predetermined time, and when image changes from first image other than raster image and ramp image to second image that is either of raster image and ramp image, display panel lowers luminance of light within time shorter than second predetermined time even after luminance of light has been raised by predetermined amount of luminance change or more within first predetermined time.
-
公开(公告)号：US11545101B2
公开(公告)日：2023-01-03
申请号：US17828644
申请日：2022-05-31
Applicant: Japan Display Inc.
Inventor： Kazunari Tomizawa , Kazuhiko Sako , Junji Kobashi , Tomoyuki Ishihara
Abstract: According to an aspect, a display device includes: a first liquid crystal panel; a second liquid crystal panel; a light source configured to emit light; and a controller configured to control the first liquid crystal panel and the second liquid crystal panel based on an image signal corresponding to a resolution of the second liquid crystal panel. The first liquid crystal panel includes dimming pixels, and the second liquid crystal panel includes pixels. More than one of the pixels is arranged within a region of each of the dimming pixels. The controller performs blurring processing and determination of dimming gradation values as processing related to operation of the second liquid crystal panel. Each of the dimming gradation values corresponds to a highest gradation value set after the blurring processing among gradation values set for the more than one pixel arranged within the region of each of the dimming pixels.
-
公开(公告)号：US10803829B2
公开(公告)日：2020-10-13
申请号：US15951783
申请日：2018-04-12
Applicant: Japan Display Inc.
Inventor： Tsutomu Harada , Kazuhiko Sako
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.
-
-
-
-
-
-
-
-
-
Search Results
44
records
(took 0.032 seconds)
