公开(公告)号：US20190237032A1

公开(公告)日：2019-08-01

申请号：US16380334

申请日：2019-04-10

Applicant: Japan Display Inc.

Inventor： Masaya TAMAKI ,  Tsutomu HARADA ,  Hirotaka HAYASHI

IPC: G09G3/36

Abstract: According to one embodiment, a display device, includes a first pixel line including a first sub-pixel and a second sub-pixel, a second pixel line including a third sub-pixel and a fourth sub-pixel, and a display driver supplying video signals which cause signal polarities of signal lines adjacent to each other to be opposite to each other, without varying the polarities in one frame period, the video signals having the same polarities as each other being written to the respective sub-pixels of the first pixel line, the video signals having the polarities which are the same as each other and opposite to the polarities of the video signals written to the first pixel line, being written to the respective sub-pixels of the second pixel line.

公开(公告)号：US20190221168A1

公开(公告)日：2019-07-18

申请号：US16248232

申请日：2019-01-15

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 ,  G09G3/3607 ,  G09G2300/0452 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2360/16

Abstract: According to an aspect, a display device includes a display unit including a plurality of pixels, a light source device that emits light that illuminates the display unit, and a controller that controls operation of the light source device. The controller does not lower luminance of the light for a second predetermined time or longer after the controller has raised the luminance of the light by a predetermined amount of luminance change or more within a first predetermined time.

公开(公告)号：US20190035339A1

公开(公告)日：2019-01-31

申请号：US16039440

申请日：2018-07-19

Applicant: Japan Display Inc.

Inventor： Kazuhiko SAKO ,  Daichi SUZUKI ,  Naoyuki TAKASAKI ,  Tsutomu HARADA ,  Kojiro IKEDA

IPC: G09G3/34 ,  G09G3/20

CPC classification number: G09G3/3426 ,  G09G3/2007 ,  G09G3/3648 ,  G09G2300/023 ,  G09G2300/0426

Abstract: According to an aspect, a display device includes a display panel comprising a plurality of pixels, a light guide plate, a light source configured to emit light from a lateral side of the light guide plate, a dimming panel, and a controller. The dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source. The dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel. When adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance.

公开(公告)号：US20240062707A1

公开(公告)日：2024-02-22

申请号：US18230459

申请日：2023-08-04

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Kazunari TOMIZAWA

IPC: G09G3/32 ,  G09G3/3225

CPC classification number: G09G3/32 ,  G09G3/3225 ,  G09G2320/0271 ,  G09G2320/0242

Abstract: A display device includes a plurality of light emitting devices included in a pixel, and a control circuit configured to define each of a plurality of subframe periods included in a frame period during which a frame image is displayed as one of an emission period in which the light emitting device is in an emission state and a non-emission period in which the light emitting device is in a non-emission state, and to control emission of the light emitting device, based on a gradation value of the pixel.

公开(公告)号：US20220382105A1

公开(公告)日：2022-12-01

申请号：US17886490

申请日：2022-08-12

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA

IPC: G02F1/13357 ,  G02F1/1335 ,  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：US20220221956A1

公开(公告)日：2022-07-14

申请号：US17706051

申请日：2022-03-28

Applicant: Japan Display Inc.

Inventor： Hayato KURASAWA ,  Kohei AZUMI ,  Koji ISHIZAKI ,  Hideki KANEKO ,  Tsutomu HARADA

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

Abstract: Display device is provided and includes display part including first and second substrates, first and second polarizing plates, display area that includes pixel electrodes, a common electrode and display functional layer each of which is arranged between first and second substrates, display image formed by applying display voltage between pixel electrodes and common electrode in display period, input part including third substrate having back surface facing front surface of display part, detection electrodes formed on back surface of third substrate, and conductive layer provided between back surface of third substrate and front surface of display part, wherein conductive layer overlaps third substrate without through detection electrodes outside display area, and part of detection electrodes is uncovered by conductive layer outside display area.

公开(公告)号：US20220005420A1

公开(公告)日：2022-01-06

申请号：US17476857

申请日：2021-09-16

Applicant: Japan Display Inc.

Inventor： Kazuhiko SAKO ,  Tsutomu HARADA

IPC: G09G3/34 ,  G09G3/36

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.

公开(公告)号：US20210174753A1

公开(公告)日：2021-06-10

申请号：US17181276

申请日：2021-02-22

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Kazunari TOMIZAWA ,  Kazunori YAMAGUCHI

IPC: G09G3/34 ,  H01L27/32

Abstract: According to one embodiment, a display device includes a display panel on which a plurality of pixels having a light emitting element is disposed and a display control unit configured to display an image on the display panel by causing each of the plurality of pixels to emit light based on a pixel signal that defines luminance of each of the plurality of pixels. The display control unit is configured to display the image by decreasing luminance of a first pixel which is a protection target pixel of the plurality of pixels and increasing luminance of a second pixel disposed around the first pixel.

公开(公告)号：US20190278404A1

公开(公告)日：2019-09-12

申请号：US16423980

申请日：2019-05-28

Applicant: Japan Display Inc.

Inventor： Koji ISHIZAKI ,  Kouji NOGUCHI ,  Tsutomu HARADA ,  Takeya TAKEUCHI ,  Yoshitoshi KIDA ,  Takayuki NAKANISHI

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

Abstract: A detection device includes a plurality of drive electrodes, wherein: in a first mode, a first drive electrode block including a first number of the drive electrodes are supplied with a first drive signal; in a second mode, a second drive electrode block including a second number of the drive electrodes are supplied with a second drive signal; and the first number is different from the second number.

公开(公告)号：US20180301116A1

公开(公告)日：2018-10-18

申请号：US15951783

申请日：2018-04-12

Applicant: Japan Display Inc.

Inventor： Tsutomu HARADA ,  Kazuhiko SAKO

IPC: G09G5/10 ,  F21V8/00 ,  G09G5/06

CPC classification number: G09G5/10 ,  G02B6/0068 ,  G09G3/2003 ,  G09G3/3413 ,  G09G3/3426 ,  G09G5/06 ,  G09G2320/0285 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2340/16

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.