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

IPC: G09G3/34 ,  G09G3/20 ,  G09G3/36

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：US11508292B2

公开(公告)日：2022-11-22

申请号：US17407344

申请日：2021-08-20

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Tadafumi Ozaki ,  Kazunari Tomizawa

IPC: G09G3/32 ,  H01L27/15

Abstract: According to one embodiment, a display device includes a first power supply line, a second power supply line, a reset line, pixels, gate lines, control wiring lines, source lines, a first driver and a second driver. Each of the pixels includes a drive transistor, a light emitting element, a pixel switch, a storage capacitor and a reset switch. The reset switch is connected between the reset line and a gate electrode of the drive transistor, and switched between an ON state and an OFF state by a second control signal provided via a corresponding control wiring line among the control wiring lines.

公开(公告)号：US10895782B2

公开(公告)日：2021-01-19

申请号：US16142926

申请日：2018-09-26

Applicant: Japan Display Inc.

Inventor： Tsutomu Harada ,  Shigenori Aoki ,  Koji Yoshida ,  Masayuki Mifune

IPC: G02F1/13357 ,  G02B27/01 ,  G09G3/32

Abstract: According to one embodiment, a display device includes a backlight device including a plurality of light sources, a display panel disposed to oppose the backlight device and incline with respect to a direction perpendicular to an optical axis of the backlight device and a diffusion plate provided between the display panel and the backlight device.

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

IPC: G09G5/10 ,  G09G3/34 ,  G09G3/20 ,  F21V8/00 ,  G09G5/06

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.

公开(公告)号：US10573252B2

公开(公告)日：2020-02-25

申请号：US15598552

申请日：2017-05-18

Applicant: Japan Display Inc.

Inventor： Shigenori Aoki ,  Tatsuya Yata ,  Tsutomu Harada

IPC: G09G3/34 ,  G02F1/1335 ,  G09G3/36

Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.

公开(公告)号：US10379682B2

公开(公告)日：2019-08-13

申请号：US14843316

申请日：2015-09-02

Applicant: Japan Display Inc.

Inventor： Makoto Hayashi ,  Tsutomu Harada

IPC: G06F3/044 ,  G06F3/041

Abstract: The touch sensor device and the display device include: a panel unit having a touch detection area in which a plurality of drive electrodes extend in an X-direction, a plurality of detection electrodes extend in a Y-direction, and a plurality of detection units each composed of a pair of the drive electrode and the detection electrode are formed in a matrix pattern; the drive electrodes each having a width forming two detection units in the Y-direction; and regions each formed by the intersection between one drive electrode and first to fourth detection electrodes. In this region, detection regions having a first sensitivity in which first to fourth detection units are provided and non-detection regions having a second sensitivity are alternately disposed. For example, the detection electrodes have different shapes between the detection region and the non-detection region.

公开(公告)号：US10121421B2

公开(公告)日：2018-11-06

申请号：US15794505

申请日：2017-10-26

Applicant: Japan Display Inc.

Inventor： Naoyuki Takasaki ,  Tsutomu Harada ,  Susumu Kimura

IPC: G09G3/34

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：US09977535B2

公开(公告)日：2018-05-22

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: G06F3/044 ,  G06F3/041 ,  G02F1/1333 ,  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：US20180121018A1

公开(公告)日：2018-05-03

申请号：US15858380

申请日：2017-12-29

Applicant: Japan Display Inc.

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

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

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.