公开(公告)号：US09933892B2

公开(公告)日：2018-04-03

申请号：US15265383

申请日：2016-09-14

Applicant: Japan Display Inc.

Inventor： Hayato Kurasawa ,  Kohei Azumi ,  Koji Ishizaki ,  Hideki Kaneko ,  Tsutomu Harada

IPC: G06F3/041 ,  G06F3/045 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1343 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G02F1/13338 ,  G02F1/133528 ,  G02F1/134363 ,  G02F2001/134318 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04103 ,  Y10T29/49117

Abstract: The reliability of a display device with an input device is improved. A plurality of detection electrodes (input position detection electrodes) forming an electrostatic capacity between them and a common electrode of a display device to detect an input position are formed on a different substrate from substrates configuring the display device. Moreover, a polarizing plate and the substrate on which the plurality of detection electrodes are formed are adhesively fixed via, for example, an adhesive layer so that the plurality of detection electrodes are fixed so as to be separated apart from the display device. Thus, a distance between electrodes (the detection electrode and a driving electrode) for detecting an input position can be set separately from a thickness of the display device, and therefore, reduction in detection sensitivity (detection reliability) for the input position due to increase in the electrostatic capacity can be suppressed.

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

IPC: G09G5/00 ,  G09G3/34

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：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.

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.

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

IPC: G09G3/34 ,  G09G3/36 ,  G09G3/20

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.

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.

公开(公告)号：US09349173B2

公开(公告)日：2016-05-24

申请号：US14755725

申请日：2015-06-30

Applicant: Japan Display Inc.

Inventor： Soichiro Kurokawa ,  Toshiyuki Nagatsuma ,  Tsutomu Harada

IPC: G06K9/40 ,  G06T5/40 ,  H04N5/20 ,  H04N5/202

CPC classification number: G06T5/40 ,  H04N5/20 ,  H04N5/202

Abstract: Disclosed herein is an image processor including: a random number sequence generation section adapted to generate a random number sequence; a random number-superimposed luminance variable generation section adapted to generate a random number-superimposed luminance variable by superimposing the random number sequence on a luminance variable; and a random number-superimposed image signal generation section adapted to generate a random number-superimposed image signal by superimposing the random number-superimposed luminance variable on an image signal.

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

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.

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。

公开(公告)号：US20150310828A1

公开(公告)日：2015-10-29

申请号：US14682520

申请日：2015-04-09

Applicant: Japan Display Inc.

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

IPC: G09G5/10 ,  G09G5/18

CPC classification number: G09G3/3406 ,  G09G2320/064 ,  G09G2320/0646

Abstract: Provided are a display apparatus and an illumination apparatus including: a light source; a time division control unit that performs a time division operation on a value represented by a first luminance control signal of a first bit number for controlling luminance of the light source to generate second luminance control signals each having a second bit number that is smaller than the first bit number and generates third luminance control signals each having a pulse width that corresponds to one of the values represented by the second luminance control signals; and a drive unit that generates drive signals for causing the light source to emit light on the basis of the third luminance control signals and supplies the drive signals to the light source.

Abstract translation: 提供一种显示装置和照明装置，包括：光源; 时分控制单元，对由第一位数的第一亮度控制信号表示的值进行时分运算，用于控制光源的亮度，以产生第二亮度控制信号，每个第二亮度控制信号的第二位数小于 产生第一亮度控制信号，每个具有对应于由第二亮度控制信号表示的值之一的脉冲宽度的第三亮度控制信号; 以及驱动单元，其产生用于使光源基于第三亮度控制信号发光的驱动信号，并将驱动信号提供给光源。

公开(公告)号：US20140267471A1

公开(公告)日：2014-09-18

申请号：US14184819

申请日：2014-02-20

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Masaaki Kabe ,  Fumitaka Goto ,  Toshiyuki Nagatsuma

IPC: G09G5/04

CPC classification number: G09G5/04 ,  G09G3/342 ,  G09G2320/0242 ,  G09G2320/062 ,  G09G2320/0646 ,  G09G2320/0666

Abstract: According to an aspect, a display device includes: an image display panel; a signal processing unit; and a signal processing circuit. The signal processing unit calculates an extension coefficient α for an input signal, calculates an output signal of a first sub-pixel, calculates an output signal of a second sub-pixel, calculates an output signal of a third sub-pixel, calculates an output signal of a fourth sub-pixel, and calculates a control signal. The signal processing circuit performs filtering processing on the control signal by a set first time constant to calculate and output a light-source device control signal, when the control signal is smaller than a set threshold value, and performs filtering processing on the control signal by a set second time constant to calculate and output the light-source device control signal, when the control signal is equal to or larger than the threshold value.

Abstract translation: 根据一方面，一种显示装置包括：图像显示面板; 信号处理单元; 和信号处理电路。 信号处理单元计算输入信号的扩展系数α，计算第一子像素的输出信号，计算第二子像素的输出信号，计算第三子像素的输出信号，计算输出 信号，并计算控制信号。 当控制信号小于设定的阈值时，信号处理电路对设定的第一时间常数对控制信号进行滤波处理，以计算和输出光源装置控制信号，并且通过 当控制信号等于或大于阈值时，设定第二时间常数来计算和输出光源装置控制信号。