公开(公告)号：US11436859B2

公开(公告)日：2022-09-06

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: G06V40/13

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：US11386860B2

公开(公告)日：2022-07-12

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：US20160231497A1

公开(公告)日：2016-08-11

申请号：US15011936

申请日：2016-02-01

Applicant: Japan Display Inc.

Inventor： Hirofumi Kato

IPC: F21V8/00 ,  G09G3/32 ,  G09G3/34 ,  G02F1/13 ,  G02F1/1334

CPC classification number: G02B6/0035 ,  G02B6/0083 ,  G02F1/1326 ,  G02F1/1334 ,  G02F1/1336 ,  G02F1/133615 ,  G02F2001/133601 ,  G09G3/3406 ,  G09G3/3473 ,  G09G2320/0646

Abstract: A display apparatus includes an image display panel, a light source device, and a control device. The light source device includes a light source that emits light and a light guide member arranged on the back surface side of the panel as seen from the display surface, receives the light via its side surface with respect to its surface facing the panel, and has divided areas arranged in a direction in which the light travels. Each area includes a light modulation layer brought in a light transmission state or in a light scattering state. The control device brings the layers in the scattering state in respective scattering control periods temporally different from each other. When bringing a light modulation layer in the scattering state, the control device controls the light source device with a drive pattern based on a distance between the side surface and the corresponding area.

Abstract translation: 显示装置包括图像显示面板，光源装置和控制装置。 光源装置包括发光部的光源和从显示面观察配置在面板的背面侧的导光部件，通过其相对于面向面板的面的侧面接收光，并具有 沿着光行进的方向排列的分割区域。 每个区域包括带有光透射状态或光散射状态的光调制层。 控制装置使各层在各个时间上彼此不同的散射控制周期中处于散射状态。 当将光调制层带入散射状态时，控制装置基于侧表面和对应区域之间的距离以驱动图案来控制光源装置。

公开(公告)号：US11719573B2

公开(公告)日：2023-08-08

申请号：US17010413

申请日：2020-09-02

Applicant: Japan Display Inc.

Inventor： Hitoshi Tanaka ,  Masahiro Tada ,  Takashi Nakamura ,  Hiroshi Mizuhashi ,  Fumitaka Gotoh ,  Hirofumi Kato

IPC: G01J1/44 ,  H03K17/693 ,  G01K7/16 ,  H03K17/687 ,  H03K19/20 ,  H01L29/786

CPC classification number: G01J1/44 ,  G01K7/16 ,  H03K17/6872 ,  H03K17/693 ,  H03K19/20 ,  H01L29/78633 ,  H01L29/78675

Abstract: Provided are a substrate, an organic material layer provided above the substrate at a position overlapping at least a detection region, a plurality of detection electrodes provided between the substrate and the organic material layer in a direction orthogonal to the substrate, a first switching element provided to each of the detection electrodes, a plurality of gate lines coupled with some first switching elements and extending in a first direction, a plurality of signal lines coupled with some first switching elements and extending in a second direction intersecting the first direction, and a drive circuit configured to supply gate drive signals having potentials determined for the respective gate lines based on a predetermined code to the respective first switching elements through the gate lines.

公开(公告)号：US11687196B2

公开(公告)日：2023-06-27

申请号：US17951296

申请日：2022-09-23

Applicant: Japan Display Inc.

Inventor： Hirofumi Kato ,  Ayato Kitamura

IPC: G06V40/13 ,  G06F3/042 ,  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：US10816843B2

公开(公告)日：2020-10-27

申请号：US16244213

申请日：2019-01-10

Applicant: Japan Display Inc.

Inventor： Hirofumi Kato

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

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：US11915096B2

公开(公告)日：2024-02-27

申请号：US17885716

申请日：2022-08-11

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：US10573256B2

公开(公告)日：2020-02-25

申请号：US16352152

申请日：2019-03-13

Applicant: Japan Display Inc.

Inventor： Hirofumi Kato

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

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：US10121420B2

公开(公告)日：2018-11-06

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

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：US12178059B2

公开(公告)日：2024-12-24

申请号：US17500329

申请日：2021-10-13

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: H01L29/78 ,  H01L29/786 ,  H10K39/32 ,  A61B5/021 ,  G06V40/13

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.