公开(公告)号：US09734772B2

公开(公告)日：2017-08-15

申请号：US14695072

申请日：2015-04-24

Applicant: Japan Display Inc.

Inventor： Masashi Mitsui ,  Toshiyuki Nagatsuma

IPC: G09G3/36 ,  G09G3/20 ,  G09G5/24

CPC classification number: G09G3/3607 ,  G09G3/2066 ,  G09G3/2081 ,  G09G3/3648 ,  G09G5/243 ,  G09G2300/0452 ,  G09G2320/04 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2340/06 ,  G09G2340/145

Abstract: A display device includes: a display unit including pixels arranged in a matrix therein, each of the pixels including a first sub-pixel that displays a first color component, a second sub-pixel that displays a second color component, a third sub-pixel that displays a third color component, and a fourth sub-pixel that displays a fourth color component; and a signal processing unit that receives input signals that are capable of being displayed with the first sub-pixel, the second sub-pixel, and the third sub-pixel, and calculates output signals to the first, second, third, and fourth sub-pixels. The signal processing unit generates converted input signals with changed saturation among the input signals. The signal processing unit calculates output signals to the first sub-pixel, the second sub-pixel, and the third sub-pixel based on the converted input signals and an amount of increase in brightness caused by the fourth sub-pixel.

公开(公告)号：US09378691B2

公开(公告)日：2016-06-28

申请号：US14936435

申请日：2015-11-09

Applicant: Japan Display Inc.

Inventor： Fumitaka Gotoh ,  Tsutomu Harada ,  Masaaki Kabe ,  Tae Kurokawa ,  Kojiro Ikeda ,  Toshiyuki Nagatsuma ,  Akira Sakaigawa ,  Naoyuki Takasaki ,  Amane Higashi

IPC: G09G5/02 ,  G09G3/36 ,  G09G5/10

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.

公开(公告)号：US09311886B2

公开(公告)日：2016-04-12

申请号：US14073443

申请日：2013-11-06

Applicant: Japan Display Inc.

Inventor： Kojiro Ikeda ,  Fumitaka Goto ,  Tae Nakahara ,  Masashi Mitsui ,  Amane Higashi ,  Hiroki Uchiyama ,  Toshiyuki Nagatsuma ,  Hirokazu Tatsuno ,  Masaaki Kabe ,  Akira Sakaigawa

IPC: G09G5/00 ,  G09G3/36 ,  G09G5/02

CPC classification number: G09G5/02 ,  G09G3/3648 ,  G09G2300/0452 ,  G09G2340/06

Abstract: According to an aspect, a display device includes an image display panel on which pixels each including sub-pixels for displaying a first color, a second color, a third color, and a fourth color are arranged, and a signal processing unit that converts an input value of an input signal for an input HSV color space into an output signal for an extended HSV color space. The signal processing unit divides the extended HSV color space into a plurality of spaces, sets limit proportion values different from each other with respect to at least two spaces of the divided spaces respectively, calculates an extension coefficient α with respect to the input signal by using the input signal and a limit proportion value set with respect to a space according to the input signal, and calculates the output signal based on at least the input signal and the extension coefficient α.

Abstract translation: 根据本发明的一个方面，一种显示装置包括图像显示面板，在该图像显示面板上布置有各自包括用于显示第一颜色，第二颜色，第三颜色和第四颜色的子像素的像素，以及信号处理单元， 用于输入HSV色彩空间的输入信号的输入值作为扩展HSV色彩空间的输出信号。 信号处理单元将扩展HSV颜色空间分割为多个空格，分别相对于分割空间的至少两个空格设定彼此不同的极限比例值，通过使用相对于输入信号计算扩展系数α 输入信号和根据输入信号相对于空间设置的限制比例值，并且至少基于输入信号和扩展系数α来计算输出信号。

公开(公告)号：US20160063935A1

公开(公告)日：2016-03-03

申请号：US14936435

申请日：2015-11-09

Applicant: Japan Display Inc.

Inventor： Fumitaka Gotoh ,  Tsutomu Harada ,  Masaaki Kabe ,  Tae Kurokawa ,  Kojiro Ikeda ,  Toshiyuki Nagatsuma ,  Akira Sakaigawa ,  Naoyuki Takasaki ,  Amane Higashi

IPC: G09G3/36 ,  G09G5/10

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.

公开(公告)号：US20140347410A1

公开(公告)日：2014-11-27

申请号：US14455203

申请日：2014-08-08

Applicant: Japan Display Inc.

Inventor： Amane Higashi ,  Toshiyuki Nagatsuma ,  Akira Sakaigawa ,  Masaaki Kabe

IPC: G09G3/34

CPC classification number: G09G3/3413 ,  G09G3/3426 ,  G09G3/3648 ,  G09G2300/0452 ,  G09G2320/0646 ,  G09G2340/06 ,  G09G2360/145

Abstract: An image display device includes an image display panel configured of pixels made up of first, second, third, and fourth sub-pixels being arrayed in a two-dimensional matrix shape, and a signal processing unit into which an input signal is input and from which an output signal based on an extension coefficient is output, and causes the signal processing unit to obtain a maximum value of luminosity with saturation S in the HSV color space enlarged by adding a fourth color, as a variable, and to obtain a reference extension coefficient based on the maximum value, and further to determine an extension coefficient at each pixel from the reference extension coefficient, an input signal correction coefficient based on the sub-pixel input signal values at each pixel, and an external light intensity correction coefficient based on external light intensity.

Abstract translation: 图像显示装置包括由以二维矩阵形状排列的第一，第二，第三和第四子像素构成的像素构成的图像显示面板和输入输入信号的信号处理单元 输出基于扩展系数的输出信号，并且使信号处理单元通过添加第四颜色作为变量来获得HSV颜色空间中的具有饱和度S的亮度的最大值，并且获得参考扩展 基于最大值的系数，并且还根据参考扩展系数确定每个像素处的扩展系数，基于每个像素处的子像素输入信号值的输入信号校正系数和基于 外部光强度。

公开(公告)号：US20140168284A1

公开(公告)日：2014-06-19

申请号：US14086476

申请日：2013-11-21

Applicant: Japan Display Inc.

Inventor： Masaaki Kabe ,  Toshiyuki Nagatsuma ,  Amane Higashi ,  Kojiro Ikeda ,  Tae Kurokawa ,  Masashi Mitsui ,  Hiroki Uchiyama ,  Hirokazu Tatsuno ,  Fumitaka Goto ,  Akira Sakaigawa

IPC: G09G3/36 ,  G09G3/20

CPC classification number: G09G3/3607 ,  G09G3/2003 ,  G09G3/3648 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2340/06 ,  G09G2360/16

Abstract: According to an aspect, a display device includes a first sub-pixel, a second sub-pixel, a third sub-pixel; and a fourth sub-pixel. A signal obtained based on at least an input signal for the first sub-pixel and an extension coefficient is supplied to the first sub-pixel. A signal obtained based on at least an input signal for the second sub-pixel and the extension coefficient is supplied to the second sub-pixel. A signal obtained based on at least an input signal for the third sub-pixel and the extension coefficient is supplied to the third sub-pixel. A signal obtained based on at least the input signal for the first sub-pixel, the input signal for the second sub-pixel, the input signal for the third sub-pixel, and the extension coefficient is supplied to the fourth sub-pixel. The extension coefficient varies based on at least a saturation of the input signals.

Abstract translation: 根据一个方面，显示装置包括第一子像素，第二子像素，第三子像素; 和第四子像素。 至少基于第一子像素的输入信号获得的信号和扩展系数被提供给第一子像素。 至少基于第二子像素的输入信号获得的信号和扩展系数被提供给第二子像素。 至少基于第三子像素的输入信号获得的信号和扩展系数被提供给第三子像素。 基于至少基于第一子像素的输入信号，第二子像素的输入信号，第三子像素的输入信号和扩展系数获得的信号被提供给第四子像素。 扩展系数至少基于输入信号的饱和度而变化。

公开(公告)号：US09978339B2

公开(公告)日：2018-05-22

申请号：US15648177

申请日：2017-07-12

Applicant: Japan Display Inc.

Inventor： Kojiro Ikeda ,  Toshiyuki Nagatsuma ,  Masaaki Kabe ,  Amane Higashi ,  Tae Kurokawa ,  Fumitaka Gotoh ,  Akira Sakaigawa

IPC: G09G5/02 ,  G09G5/10 ,  G09G3/36

CPC classification number: G09G5/10 ,  G09G3/3607 ,  G09G3/3648 ,  G09G5/02 ,  G09G2300/0452 ,  G09G2340/0457 ,  G09G2340/06 ,  G09G2360/16

Abstract: A display device includes a signal processing unit that receives input signals, and calculates output signals to a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The signal processing unit calculates a frequency of pixels belonging to each of a plurality of partitions using a light quantity of a surface light source. The signal processing unit calculates an index value for each of the partitions by at least multiplying the cumulative frequency being obtained by sequentially adding the frequency of pixels from a partition having the maximum light quantity among the partitions, and the number of partitions representing a position of a partition to which the cumulative frequency belongs counted from the partition having the maximum light quantity. The signal processing unit controls luminance of the surface light source based on a partition in which the index value exceeds a threshold.

公开(公告)号：US09830886B2

公开(公告)日：2017-11-28

申请号：US14710110

申请日：2015-05-12

Applicant: Japan Display Inc.

Inventor： Amane Higashi ,  Toshiyuki Nagatsuma ,  Akira Sakaigawa ,  Masaaki Kabe

IPC: G09G5/24 ,  G09G3/36 ,  G09G3/20

CPC classification number: G09G5/243 ,  G09G3/2066 ,  G09G3/2081 ,  G09G3/3607 ,  G09G3/3648 ,  G09G2300/0452 ,  G09G2320/04 ,  G09G2330/021 ,  G09G2340/06 ,  G09G2340/145

Abstract: According to an aspect, a display device includes an image display panel in which pixels each including first to fourth sub-pixels are arranged in a two-dimensional matrix; and a signal processing unit that converts an input signal into an output signal and outputs the generated output signal to the image display panel. The signal processing unit determines an expansion coefficient, obtains a generated signal of the fourth sub-pixel in each pixel based on input signals of the first to the third sub-pixels in the pixel itself and the expansion coefficient, obtains an output signal for the fourth sub-pixel in each pixel based on a generated signal of the fourth sub-pixel in the pixel itself and a generated signal of the fourth sub-pixel in an adjacent pixel to be output to the fourth sub-pixel.

公开(公告)号：US09734766B2

公开(公告)日：2017-08-15

申请号：US14804479

申请日：2015-07-21

Applicant: Japan Display Inc.

Inventor： Akira Sakaigawa ,  Toshiyuki Nagatsuma

IPC: G09G5/00 ,  G09G3/34

CPC classification number: G09G3/3406 ,  G09G2320/02 ,  G09G2320/062 ,  G09G2320/0653

Abstract: A lighting device includes a light source and a control section. The control section has a first mode and a second mode as luminance setting modes of the light source and sets, in order to exercise variable control of a reach time taken to change luminance of the light source to a determined value, the reach time on the basis of the first mode for a determined period at the time of switching from the first mode to the second mode.

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

IPC: G09G3/36 ,  G09G3/20 ,  G09G3/34

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.