公开(公告)号：US20240170602A1

公开(公告)日：2024-05-23

申请号：US18425774

申请日：2024-01-29

Applicant: Japan Display Inc. ,  The University of Tokyo

Inventor： Hirofumi KATO ,  Takanori TSUNASHIMA ,  Makoto UCHIDA ,  Takashi NAKAMURA ,  Akio TAKIMOTO ,  Takao SOMEYA ,  Tomoyuki YOKOTA

IPC: H01L31/12 ,  G01J1/04 ,  G01J1/42 ,  G06T1/00 ,  G06V40/13 ,  H01L27/146 ,  H01L31/167

CPC classification number: H01L31/12 ,  G01J1/0492 ,  G01J1/4228 ,  G06T1/0007 ,  G06V40/1318 ,  H01L27/14612 ,  H01L27/14621 ,  H01L27/14636 ,  H01L31/167 ,  A61B2562/0233 ,  G06V40/14

Abstract: A detection device according to an aspect includes: a sensor base; a plurality of photoelectric conversion elements that are provided in a detection area of the sensor base and are configured to receive light incident thereon and output signals corresponding to the received light; a plurality of switching elements provided in the respective photoelectric conversion elements; a plurality of gate lines that are coupled to the switching elements and extend in a first direction; a first light source configured to emit first light having a first maximum emission wavelength; and a second light source configured to emit second light having a second maximum emission wavelength.

公开(公告)号：US20230015361A1

公开(公告)日：2023-01-19

申请号：US17951296

申请日：2022-09-23

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO ,  Ayato KITAMURA

IPC: G06F3/042 ,  G06V40/13 ,  G09G3/36

Abstract: A detection device includes: optical sensors; switching elements, gate lines, and signal lines corresponding to the optical sensors; a detection circuit that is supplied with signals from the optical sensors through the signal lines; and a signal line selection circuit for switching a coupling state between the signal lines and the detection circuit. A drive signal is supplied to the gate lines row by row to bring the switching elements belonging to a predetermined row into a coupled state. The signal line selection circuit couples the signal lines to the detection circuit column by column in a predetermined order in a reading period of the predetermined row. A reset potential is supplied to the optical sensors and the signal lines belonging to the predetermined row after completion of the reading period of the predetermined row and before start of the reading period of a row next to the predetermined row.

公开(公告)号：US20220338352A1

公开(公告)日：2022-10-20

申请号：US17718919

申请日：2022-04-12

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO ,  Yoshitaka KOJIMA

IPC: H05K1/18

Abstract: A detection device includes a sensor substrate provided with a plurality of photosensors, a control board provided with a control circuit configured to control the photosensors, and a flexible printed circuit board provided with wiring configured to electrically couple the sensor substrate to the control board. The flexible printed circuit board is provided with a plurality of cutting indication lines for changing a length between the sensor substrate and the flexible printed circuit board.

公开(公告)号：US20190213962A1

公开(公告)日：2019-07-11

申请号：US16352152

申请日：2019-03-13

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/34 ,  F21V8/00 ,  G02F1/1335 ,  G02F1/13 ,  G09G3/36 ,  G02F1/137 ,  G02F1/1343 ,  G02F1/1334

Abstract: In a display device, an image display panel updates an image in a frame cycle including an image scanning period and a vertical blanking period, a light modulation layer is disposed at a back of the panel and switched to a scattering or transmission state depending on an electric field applied, a light source emits light which enters the light modulation layer from its side and travels therethrough, electrodes are formed according to divided areas of the light modulation layer arranged in a direction of the light and apply the electric field to the light modulation layer, and a controller drives the electrodes in synchronization with image scanning to switch the divided areas to the scattering state in order during the image scanning period, and drives the electrodes according to distances from the side to control the scattering state on the individual divided areas during the vertical blanking period.

公开(公告)号：US20230301125A1

公开(公告)日：2023-09-21

申请号：US18121181

申请日：2023-03-14

Applicant: Japan Display Inc.

Inventor： Makoto HAYASHI ,  Hirofumi KATO ,  Yoshitaka KOJIMA ,  Yuta HAGA ,  Ayato KITAMURA ,  Yoshiyuki TERADA

IPC: H10K39/00 ,  G06V40/13 ,  G06V10/147

CPC classification number: H10K39/601 ,  G06V40/13 ,  G06V10/147

Abstract: According to an aspect, a detection device includes: a light source configured to emit light to an object to be detected; a plurality of photodiodes arranged in a detection area; one or more detection circuits; and a coupling switching circuit configured to switch coupling of one or more of the photodiodes to one or more of the detection circuits. The coupling switching circuit is configured to change the number of the detection circuits coupled to one or more of the photodiodes based on an output value from one or more of the photodiodes.

公开(公告)号：US20210241707A1

公开(公告)日：2021-08-05

申请号：US17238962

申请日：2021-04-23

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/36 ,  G09G3/34 ,  G02F1/1343 ,  G02F1/1368 ,  G02F1/1334 ,  G02F1/137 ,  G02F1/1362 ,  F21V8/00

Abstract: According to one embodiment, a display device includes a display panel including a display area where first drive areas and second drive areas are alternately disposed, and display function layers which include first display function layers and second display function layers and which are changed to a transparent state and a scattering state, and a control unit. The control unit applies a drive voltage to the first display function layers, in a first field period. The control unit applies the drive voltage to the second display function layers, in a second field period. A polarity of the drive voltage in the first field period is different from a polarity of the drive voltage in the second field period.

公开(公告)号：US20190228719A1

公开(公告)日：2019-07-25

申请号：US16244213

申请日：2019-01-10

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/34 ,  G09G3/36 ,  G02F1/1343 ,  G02F1/1368 ,  G02F1/1362 ,  G02F1/1334 ,  G02F1/137

Abstract: According to one embodiment, a display device includes a display panel including a display area where first drive areas and second drive areas are alternately disposed, and display function layers which include first display function layers and second display function layers and which are changed to a transparent state and a scattering state, and a control unit. The control unit applies a drive voltage to the first display function layers, in a first field period. The control unit applies the drive voltage to the second display function layers, in a second field period. A polarity of the drive voltage in the first field period is different from a polarity of the drive voltage in the second field period.

公开(公告)号：US20180211611A1

公开(公告)日：2018-07-26

申请号：US15847114

申请日：2017-12-19

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/34 ,  G02F1/1334 ,  G02F1/137 ,  G02F1/1335 ,  G02F1/1368 ,  G02F1/1343 ,  G02F1/1362 ,  G09G3/36

CPC classification number: G09G3/3413 ,  G02F1/1334 ,  G02F1/133621 ,  G02F1/134309 ,  G02F1/136286 ,  G02F1/1368 ,  G02F1/137 ,  G02F2001/13347 ,  G02F2001/133622 ,  G02F2201/121 ,  G02F2201/123 ,  G09G3/2092 ,  G09G3/342 ,  G09G3/3611 ,  G09G3/3614 ,  G09G3/3648 ,  G09G3/3655 ,  G09G2300/0478 ,  G09G2310/08 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/0666

Abstract: In an embodiment, a display device comprises a display panel, a light source and a controller. The display panel including pixels, a common electrode, pixel electrodes and a liquid crystal layer containing a polymer dispersed liquid crystal. The light source emits light to the display panel. The liquid crystal layer scatters light when scattering voltage is applied between the common electrode and the pixel electrodes, and transmits light when transparent voltage is applied between the common electrode and the pixel electrodes. The controller applies the transparent voltage in a first period, and applies voltage in accordance with image data in a second period.

公开(公告)号：US20180211610A1

公开(公告)日：2018-07-26

申请号：US15846782

申请日：2017-12-19

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/34 ,  G02F1/1334 ,  G02F1/137 ,  G02F1/1343 ,  G02F1/1335 ,  G09G3/36

CPC classification number: G09G3/3413 ,  G02F1/1334 ,  G02F1/133621 ,  G02F1/134309 ,  G02F1/137 ,  G02F2001/13347 ,  G02F2001/133622 ,  G02F2201/121 ,  G09G3/2092 ,  G09G3/342 ,  G09G3/3611 ,  G09G3/3614 ,  G09G3/3648 ,  G09G3/3655 ,  G09G2300/0478 ,  G09G2310/08 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/0666

Abstract: According to one embodiment, a display device includes a display panel, a light source unit, and a controller which controls the display panel and the light source unit, wherein the controller applies scattering voltage between a common electrode and a first pixel electrode in a first area and between the common electrode and a second pixel electrode in a second area, and a liquid crystal layer scatters light in a first display color in the first area, and scatters light in a second display color different from the first display color in the second area.

公开(公告)号：US20240180455A1

公开(公告)日：2024-06-06

申请号：US18437293

申请日：2024-02-09

Applicant: Japan Display Inc.

Inventor： Yasushi TOMIOKA ,  Akio TAKIMOTO ,  Hirofumi KATO ,  Takashi NAKAMURA ,  Chiharu KABURAGI ,  Hiroyuki KIMURA ,  Miharu MATSUSHIMA

IPC: A61B5/1455

CPC classification number: A61B5/14552 ,  A61B2562/0238 ,  A61B2562/0242

Abstract: According to an aspect, a transcutaneous muscle oxygen saturation detection device includes: a light source configured to emit light into a body; and a first light detector and a second light detector that are configured to detect reflected light reflected in the body. The second light detector is circumferentially displaced about the light source from a first imaginary line connecting the light source to the first light detector.