公开(公告)号：US20240160872A1

公开(公告)日：2024-05-16

申请号：US18418648

申请日：2024-01-22

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G06K7/14 ,  G06V40/13

CPC classification number: G06K7/1417 ,  G06V40/1318

Abstract: According to an aspect, a detection system includes: a sensor provided with a plurality of photosensors in a detection area; a controller configured to control the sensor; and a data storage configured to store correction value data including correction values for detection values of the photosensors and identification codes of a plurality of the sensors in such a manner that the identification codes are associated one-to-one with the correction value data. The controller is configured to acquire the correction value data corresponding to the identification code of the sensor from the data storage and correct the detection values of the photosensors based on the acquired correction value data.

公开(公告)号：US20240071128A1

公开(公告)日：2024-02-29

申请号：US18501351

申请日：2023-11-03

Applicant: Japan Display Inc. ,  The University of Tokyo

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

IPC: G06V40/13 ,  A61B5/1172 ,  G06F21/32 ,  G06V40/12 ,  G06V40/145

CPC classification number: G06V40/1324 ,  A61B5/1172 ,  G06F21/32 ,  G06V40/1341 ,  G06V40/1365 ,  G06V40/145

Abstract: A detection device includes a plurality of optical sensors arranged in a detection area, a light source configured to emit light that is emitted to an object to be detected and is detected by the optical sensors, and a processor configured to perform processing based on outputs from the optical sensors. The processor is configured to determine, based on the outputs of the respective optical sensors obtained at a cycle of a predetermined period, an optical sensor an output of which is to be employed from among the optical sensors.

公开(公告)号：US20230280865A1

公开(公告)日：2023-09-07

申请号：US18196252

申请日：2023-05-11

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO ,  Ayato KITAMURA

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

CPC classification number: G06F3/0421 ,  G06V40/13 ,  G09G3/3611

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：US20210240963A1

公开(公告)日：2021-08-05

申请号：US17233650

申请日：2021-04-19

Applicant: Japan Display Inc.

Inventor： Takashi NAKAMURA ,  Makoto UCHIDA ,  Takanori TSUNASHIMA ,  Hirofumi KATO ,  Akio TAKIMOTO

IPC: G06K9/00

Abstract: A fingerprint detection device includes a substrate, a plurality of photoelectric conversion elements that are provided to the substrate and each output a signal corresponding to light emitted thereto, a plurality of signal lines coupled to the photoelectric conversion elements, a detection circuit that is electrically coupled to the photoelectric conversion elements through the signal lines, and a signal line selection circuit that switches the number of the signal lines to be coupled to the one detection circuit.

公开(公告)号：US20210003870A1

公开(公告)日：2021-01-07

申请号：US17028374

申请日：2020-09-22

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G02F1/1334 ,  G09G3/34 ,  G09G3/36 ,  G02F1/1343 ,  G02F1/1368 ,  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：US20180211630A1

公开(公告)日：2018-07-26

申请号：US15872388

申请日：2018-01-16

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

IPC: G09G3/36 ,  G02F1/1334 ,  G02F1/1343 ,  G02F1/1345 ,  G02F1/137 ,  G02F1/1335 ,  G09G3/34

CPC classification number: G09G3/3696 ,  G02F1/1334 ,  G02F1/133621 ,  G02F1/134309 ,  G02F1/1345 ,  G02F1/137 ,  G02F2001/133342 ,  G02F2001/13347 ,  G02F2001/133616 ,  G02F2001/133622 ,  G02F2201/121 ,  G02F2201/123 ,  G09G3/2092 ,  G09G3/3413 ,  G09G3/3607 ,  G09G3/3611 ,  G09G3/3614 ,  G09G3/3648 ,  G09G3/3655 ,  G09G3/3674 ,  G09G2300/0456 ,  G09G2300/0478 ,  G09G2300/0495 ,  G09G2310/0237 ,  G09G2310/08 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/0666

Abstract: According to one embodiment, a display device includes a display panel including a plurality of pixel electrodes, a common electrode and a display function layer, a light source unit, and a controller. When a character is displayed in a first area of a display area, the controller applies a color other than the achromatic color to the first area, and makes a second area and a non-object area transparent. Transparency of the non-object area is higher than transparency of the second area.

公开(公告)号：US20170256210A1

公开(公告)日：2017-09-07

申请号：US15421554

申请日：2017-02-01

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO

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

CPC classification number: G09G3/3426 ,  G02F1/1326 ,  G02F1/1334 ,  G02F1/134309 ,  G02F1/137 ,  G02F2001/13756 ,  G09G3/342 ,  G09G3/3648 ,  G09G2310/024 ,  G09G2320/0646 ,  G09G2360/121 ,  G09G2360/16

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：US20250063883A1

公开(公告)日：2025-02-20

申请号：US18940007

申请日：2024-11-07

Applicant: Japan Display Inc. ,  The University of Tokyo

Inventor： Takashi NAKAMURA ,  Makoto UCHIDA ,  Masahiro TADA ,  Marina MOCHIZUKI ,  Hirofumi KATO ,  Akio TAKIMOTO ,  Takao SOMEYA ,  Tomoyuki YOKOTA

IPC: H10K39/32 ,  A61B5/021 ,  G06V40/13 ,  H01L29/786

Abstract: A detection device includes a photodiode, and a thin-film transistor coupled to the photodiode. The thin-film transistor includes a semiconductor layer between a light-blocking layer and the photodiode, and an electrode layer between the semiconductor layer and the photodiode, and the electric layer includes a source electrode and a drain electrode of the thin-film transistor. The source electrode extends to a position facing the light-blocking layer with the semiconductor layer interposed therebetween.

公开(公告)号：US20250008759A1

公开(公告)日：2025-01-02

申请号：US18883461

申请日：2024-09-12

Applicant: Japan Display Inc.

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

IPC: H10K39/00 ,  A61B5/024 ,  A61B5/1455

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 that each include a sensor electrode and an organic semiconductor layer and are arranged in a detection area; and one or a plurality of detection circuits coupled to the photodiodes. The photodiodes includes a first photodiode and a second photodiode that has a shorter distance from the light source than that of the first photodiode. A light-receiving area of the first photodiode is larger than a light-receiving area of the second photodiode.

公开(公告)号：US20240046694A1

公开(公告)日：2024-02-08

申请号：US18378501

申请日：2023-10-10

Applicant: Japan Display Inc.

Inventor： Hirofumi KATO ,  Yoshitaka KOJIMA

IPC: G06V40/13 ,  G06V40/145

CPC classification number: G06V40/1318 ,  G06V40/145

Abstract: According to an aspect, a detection device includes: a plurality of optical sensors that are arranged in a detection area and each of which is configured to output a signal corresponding to light irradiating the optical sensor; a detection circuit configured to be supplied with the signals from the optical sensors; and a control circuit configured to output first data and second data for which detection conditions for acquiring the signals differ from each other. The control circuit is configured to output detection information data in which the detection conditions for the first data and the detection conditions for the second data are added as attribute information to a head of a data string in which the first data and the second data are sequentially arranged.