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1. 发明授权

US11620964B2 Display device 有权
公开(公告)号：US11620964B2
公开(公告)日：2023-04-04
申请号：US17343074
申请日：2021-06-09
申请人： Japan Display Inc.
发明人： Tomoyuki Ishihara , Kazuhiko Sako
IPC分类号： G09G5/10 , G09G3/3275
摘要： 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.

2. 发明授权

US10699652B2 Signal processing device and display device having the same 有权
公开(公告)号：US10699652B2
公开(公告)日：2020-06-30
申请号：US16012131
申请日：2018-06-19
申请人： Japan Display Inc.
发明人： Kazunari Tomizawa , Kazuhiko Sako , Yasuo Saruhashi
IPC分类号： G09G3/36 , G09G5/02 , G02F1/13357 , H04N9/67 , G09G3/34
摘要： 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.

3. 发明授权

US10475366B2 Display device and method for driving display device 有权
公开(公告)号：US10475366B2
公开(公告)日：2019-11-12
申请号：US15839146
申请日：2017-12-12
申请人： Japan Display Inc.
发明人： Kazuhiko Sako , Tsutomu Harada
IPC分类号： G09G3/20 , G09G3/34 , G09G3/36 , G02F1/133
摘要： 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.

4. 发明授权

US10140933B2 Display apparatus and method for driving display apparatus 有权
公开(公告)号：US10140933B2
公开(公告)日：2018-11-27
申请号：US15496447
申请日：2017-04-25
申请人： Japan Display Inc.
发明人： Kazuhiko Sako , Naoyuki Takasaki , Tsutomu Harada , Tatsuya Yata , Shigenori Aoki
IPC分类号： G09G3/34 , G02B27/01
摘要： 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.

5. 发明授权

US09898973B2 Display device, electronic apparatus and method of driving display device 有权
公开(公告)号：US09898973B2
公开(公告)日：2018-02-20
申请号：US15084523
申请日：2016-03-30
申请人： Japan Display Inc.
发明人： Naoyuki Takasaki , Kazuhiko Sako , Tsutomu Harada
IPC分类号： G09G5/00 , G09G3/34
CPC分类号： G09G3/342 , G09G2320/0285 , G09G2320/0646 , G09G2330/023 , G09G2360/16
摘要： 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.

6. 发明授权

US11545101B2 Display device 有权
公开(公告)号：US11545101B2
公开(公告)日：2023-01-03
申请号：US17828644
申请日：2022-05-31
申请人： Japan Display Inc.
发明人： Kazunari Tomizawa , Kazuhiko Sako , Junji Kobashi , Tomoyuki Ishihara
IPC分类号： G09G3/36 , G09G3/34
摘要： 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.

7. 发明授权

US10803829B2 Display device and display module 有权
公开(公告)号：US10803829B2
公开(公告)日：2020-10-13
申请号：US15951783
申请日：2018-04-12
申请人： Japan Display Inc.
发明人： Tsutomu Harada , Kazuhiko Sako
IPC分类号： G09G5/10 , G09G3/34 , G09G3/20 , F21V8/00 , G09G5/06
摘要： 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.

8. 发明授权

US10540931B2 Display apparatus with reduced amount of calculation 有权
公开(公告)号：US10540931B2
公开(公告)日：2020-01-21
申请号：US15720328
申请日：2017-09-29
申请人： Japan Display Inc.
发明人： Kazuhiko Sako
IPC分类号： G09G3/34 , G09G3/20
摘要： 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.

9. 发明申请

US20180061368A1 DISPLAY APPARATUS 审中-公开
公开(公告)号：US20180061368A1
公开(公告)日：2018-03-01
申请号：US15677326
申请日：2017-08-15
申请人： Japan Display Inc.
发明人： Kazuhiko Sako , Kazunari Tomizawa , Tsutomu Harada , Naoyuki Takasaki , Tae Kurokawa
IPC分类号： G09G5/10 , G06T5/00
CPC分类号： G09G5/10 , G06T5/007 , G09G3/3208 , G09G3/3406 , G09G3/342 , G09G3/3607 , G09G3/3611 , G09G2300/0452 , G09G2320/0271 , G09G2320/0646 , G09G2320/066 , G09G2340/06 , G09G2360/16
摘要： According to an aspect, a display apparatus includes: an image display panel including a plurality of pixels and displaying an image; and a signal processor generating a second signal by multiplying signal values for a plurality of sub-pixels making up each of the plurality of pixels by a gain, the signal values being included in a first signal that is an input signal of the image. The the signal processor calculates a luminance of each of the plurality of pixels based on the signal values of the sub-pixels included in the respective pixels. The signal processor increases the gain by which the signal values of the sub-pixels of the pixel having a luminance greater than a first luminance threshold are multiplied, in accordance with the luminance of the corresponding pixel.

10. 发明授权

US09633614B2 Display device and a method for driving a display device including four sub-pixels 有权
公开(公告)号：US09633614B2
公开(公告)日：2017-04-25
申请号：US14972250
申请日：2015-12-17
申请人： Japan Display Inc.
发明人： Masaaki Kabe , Fumitaka Gotoh , Kazuhiko Sako , Toshiyuki Nagatsuma , Kojiro Ikeda , Tsutomu Harada
IPC分类号： G09G3/36 , G09G3/20
CPC分类号： G09G3/3607 , G09G3/2092 , G09G2300/0452 , G09G2340/00 , G09G2340/06
摘要： According to an aspect, a display device includes an image display panel and a signal processing unit. The signal processing unit derives a generation signal for a fourth sub-pixel in each of pixels based on an input signal for a first sub-pixel, an input signal for a second sub-pixel, an input signal for a third sub-pixel, and an extension coefficient. The signal processing unit derives a correction value based on a hue of an input color corresponding to a color to be displayed based on the input signal for the first sub-pixel, the input signal for the second sub-pixel, and the input signal for the third sub-pixel. The signal processing unit derives the output signal for the fourth sub-pixel in each of the pixels based on the generation signal for the fourth sub-pixel and the correction value and outputs the output signal to the fourth sub-pixel.

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