公开(公告)号：US20170315660A1

公开(公告)日：2017-11-02

申请号：US15468114

申请日：2017-03-24

Applicant: Japan Display, Inc

Inventor： Kouji Noguchi ,  Tsutomu Harada ,  Yoshitoshi Kida ,  Takayuki Nakanishi ,  Koji Ishizaki ,  Takeya Takeuchi

IPC: G06F3/041 ,  G02F1/1333 ,  G06F3/044 ,  G09G3/36

CPC classification number: G06F3/0416 ,  G02F1/13338 ,  G06F3/0412 ,  G06F3/044 ,  G09G3/3614 ,  G09G3/3696 ,  G09G2310/06

Abstract: A capacitance-type touch panel, allowing disturbance noise and touch detection time to be reduced and having a simple configuration, is provided. The capacitance-type touch panel including: a plurality of drive electrodes each having a strip shape; a drive control circuit performing control such that a drive signal for touch detection is selectively applied to the drive electrodes; a plurality of touch detection electrodes arranged to intersect with the drive electrodes in such a manner that capacitance is formed in each intersecting part, and each outputting a detection signal in synchronization with the drive signal; and a detection circuit detecting an external proximity object based on the detection signal. The drive control circuit controls application of the drive signal in such a manner that the detection signal is a polarity-alternating signal including a positive-negative asymmetrical signal component which is due to presence of the external proximity object.

公开(公告)号：US09691827B2

公开(公告)日：2017-06-27

申请号：US14950487

申请日：2015-11-24

Applicant: Japan Display Inc.

Inventor： Masaaki Kabe ,  Kojiro Ikeda ,  Tsutomu Harada ,  Akira Sakaigawa

IPC: H01L27/32

CPC classification number: H01L27/3218 ,  H01L27/3216 ,  H01L27/3244

Abstract: According to an aspect, a display device includes a display unit in which a plurality of pixels are arranged in a matrix along two directions intersecting with each other. Each of the pixels includes three sub-pixels corresponding to three of four colors including a first color, a second color, a third color, and a fourth color. An area of one sub-pixel among the three sub-pixels is larger than the area of each of the other two sub-pixels. A sub-pixel of the fourth color is one of the other two sub-pixels. Pixels each including the sub-pixel of the fourth color are not adjacent to each other in at least one of the two directions in the display unit.

公开(公告)号：US09691338B2

公开(公告)日：2017-06-27

申请号：US14947669

申请日：2015-11-20

Applicant: Japan Display Inc.

Inventor： Susumu Kimura ,  Fumitaka Gotoh ,  Naoyuki Takasaki ,  Tsutomu Harada

IPC: G09G3/36 ,  G09G3/34

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：US20160260395A1

公开(公告)日：2016-09-08

申请号：US15016341

申请日：2016-02-05

Applicant: Japan Display Inc.

Inventor： Kazuhiko SAKO ,  Naoyuki Takasaki ,  Tsutomu Harada

IPC: G09G3/36

CPC classification number: G09G3/3607 ,  G09G3/3426 ,  G09G3/3648 ,  G09G2300/0443 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2320/0646 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2360/148 ,  G09G2360/16

Abstract: A display device includes an image display panel, a light source unit, and a signal processing unit. The tentative expansion coefficient calculating unit calculates a tentative expansion coefficient. The tentative index value calculating unit calculates a tentative index value serving as an index of the irradiation amount of light based on the tentative expansion coefficient. The low-saturation pixel detecting unit detects low-saturation pixels in a certain region on an image display surface. The light irradiation amount calculating unit calculates a comparative light irradiation amount based on a detection by the low-saturation pixel detecting unit, a display quality maintenance reference value at which the display quality of colors displayed by the low-saturation pixels is maintained, and an index value calculated based on the tentative index value and calculates, based on the comparative light irradiation amount, a light irradiation amount serving as the irradiation amount of light.

Abstract translation: 显示装置包括图像显示面板，光源单元和信号处理单元。 暂定膨胀系数计算单元计算暂定膨胀系数。 临时指标值计算单元基于暂时膨胀系数计算用作光照射量的指标的暂定指数值。 低饱和度像素检测单元检测图像显示面上某一区域的低饱和度像素。 光照射量计算单元基于低饱和度像素检测单元的检测来计算比较光照射量，维持由低饱和度像素显示的颜色的显示质量的显示质量维持基准值，以及 基于试验性指标值计算出的指标值，并且基于比较光照射量计算用作光照射量的光照射量。

公开(公告)号：US20150364094A1

公开(公告)日：2015-12-17

申请号：US14731038

申请日：2015-06-04

Applicant: Japan Display Inc.

Inventor： Naoyuki Takasaki ,  Tsutomu Harada ,  Fumitaka Gotoh

IPC: G09G3/34 ,  G06T7/40 ,  G06T3/40 ,  G09G3/20 ,  G06T5/00

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.

Abstract translation: 显示装置包括基于图像信号显示图像的图像显示面板部分，根据基于图像信号的控制信号通过调光控制向图像显示面板部分发光的光源部分，以及 控制部分，其基于来自所述光源部分的发光亮度的变化模式的图像信号来确定所述图像显示面板部分显示的图像是动态图像还是静态图像，并且根据 静态图像控制速度与调光控制的动态图像控制速度之间的确定结果。 显示装置抑制在显示动态图像或静态图像时引起的图像质量劣化。

公开(公告)号：US20150339965A1

公开(公告)日：2015-11-26

申请号：US14705420

申请日：2015-05-06

Applicant: JAPAN DISPLAY INC.

Inventor： Tsutomu Harada ,  Naoyuki Takasaki ,  Toshiyuki Nagatsuma ,  Hirokazu Tatsuno

IPC: G09G3/20

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.

Abstract translation: 显示装置包括安装在与构成显示面板的透光性基板分离的基板上的第一处理电路和安装在透光性基板上的第二处理电路。 第一和第二处理电路接收相同的图像数据。 第一处理电路包括：确定单元，其基于图像数据使用构成图像的多个像素的颜色值，以确定用作提高图像亮度的值的展开系数值，并将展开系数值输出到 第二处理电路。 第二处理电路包括扩展处理单元，该扩展处理单元使用扩展系数值来提供用于基于图像数据提高图像的图像的亮度的扩展处理。

公开(公告)号：US20150109359A1

公开(公告)日：2015-04-23

申请号：US14505084

申请日：2014-10-02

Applicant: Japan Display Inc.

Inventor： Fumitaka Gotoh ,  Tsutomu Harada ,  Naoyuki Takasaki

IPC: G09G3/34 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G3/3406 ,  G09G3/3648 ,  G09G5/04 ,  G09G2300/0452 ,  G09G2320/0242 ,  G09G2320/0646 ,  G09G2320/0666 ,  G09G2330/023 ,  G09G2380/10

Abstract: A display device includes: an image display unit in an image display region, the image display unit including a plurality of main pixels each including sub-pixels; a light source portion that irradiates the image display region; a signal correction unit that calculates saturation and value of the main pixels based on first color information to be displayed on a predetermined pixel, the first color information being obtained based on an input video signal, and generates second color information by correcting the first color information based on the calculated saturation and value; a signal generation unit that calculates the saturation and the value of the main pixels based on the second color information, and generates a signal for determining light source luminance of the light source based on the calculated saturation and value; and a light source control unit that controls luminance of the light source based on the signal.

Abstract translation: 显示装置包括：图像显示区域中的图像显示单元，所述图像显示单元包括各自包括子像素的多个主像素; 照射所述图像显示区域的光源部; 信号校正单元，其基于要在预定像素上显示的第一颜色信息来计算主像素的饱和度和值，基于输入视频信号获得第一颜色信息，并且通过校正第一颜色信息来生成第二颜色信息 基于计算的饱和度和值; 信号生成单元，其基于所述第二颜色信息计算所述主像素的饱和度和所述值，并且基于所计算的饱和度和值生成用于确定所述光源的光源亮度的信号; 以及光源控制单元，其基于该信号来控制光源的亮度。

公开(公告)号：US20150109351A1

公开(公告)日：2015-04-23

申请号：US14519755

申请日：2014-10-21

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Naoyuki Takasaki ,  Susumu Kimura ,  Yasuhisa Shiraishi

IPC: G09G3/36 ,  G09G3/34

CPC classification number: G09G3/3607 ,  G09G3/3413

Abstract: According to an aspect, a display device includes: an image display panel; and a planar light source including a light guide plate and an edge-lit light source, the light guide plate illuminating the image display panel from a back side, the edge-lit light source including a plurality of light sources arranged facing a plane of incidence; and a controller that controls luminance of each of the light sources independently. The controller stores therein, as lookup tables for the respective light sources, information on light intensity distributions of light that is incident on the light guide plate from the respective light sources and is emitted to a plane of the image display panel from the light guide plate, and controls a light quantity of each of the light sources based on information on an input signal of an image, and on the lookup tables.

Abstract translation: 根据一方面，一种显示装置包括：图像显示面板; 以及包括导光板和边缘照明光源的平面光源，所述导光板从背面照射所述图像显示面板，所述边缘照明光源包括面向入射平面布置的多个光源 ; 以及独立地控制各个光源的亮度的控制器。 控制器作为各个光源的查找表存储有关于从各个光源入射到导光板上的光的光强度分布的信息，并从导光板发射到图像显示面板的平面 并且基于关于图像的输入信号的信息以及查找表来控制每个光源的光量。

公开(公告)号：US12222600B2

公开(公告)日：2025-02-11

申请号：US17886490

申请日：2022-08-12

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada

IPC: G02F1/00 ,  G02F1/1335 ,  G02F1/13357 ,  G09G3/34

Abstract: According to one embodiment, a display device includes a display panel including a display area which displays images, a plurality of light sources irradiating light to display an image on the display area and a control unit which sequentially causes the plurality of light source, which correspond to a plurality of areas divided from the display area, to emit light for each of the areas. The control unit repeatedly causes the light source, which corresponds to an area specified from the plurality of areas based on the image, to emit light during one frame period of displaying an image on the display area.

公开(公告)号：US11948522B2

公开(公告)日：2024-04-02

申请号：US17476857

申请日：2021-09-16

Applicant: Japan Display Inc.

Inventor： Kazuhiko Sako ,  Tsutomu Harada

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/342 ,  G09G3/36 ,  G09G2300/0452 ,  G09G2320/0233 ,  G09G2360/16

Abstract: According to an aspect, a display device includes: an image display panel having an image display surface on which display is to be controlled based on an image signal; a light source device that includes light sources provided corresponding to divided partial areas of the image display surface, and is configured to illuminate the image display surface; and a signal processor configured to calculate a light quantity of each light source for each of the partial areas. The signal processor is configured to calculate the light quantity for each partial area based on the image signal, set one of the partial areas as an adjustment target partial area for the light quantity, and adjust the light quantity in the adjustment target partial area when the light quantity of an adjacent partial area located around the adjustment target partial area is equal to or smaller than a predetermined value.