公开(公告)号：US11966071B2

公开(公告)日：2024-04-23

申请号：US18111741

申请日：2023-02-20

Applicant: Sharp Display Technology Corporation

Inventor： Shugo Yagi ,  Junichi Masuda ,  Yuuichi Kanbayashi ,  Satoshi Tsubooka

IPC: F21V8/00

CPC classification number: G02B6/0036 ,  G02B6/003 ,  G02B6/0038 ,  G02B6/0048 ,  G02B6/0053 ,  G02B6/0075 ,  G02B6/0076

Abstract: According to an aspect of the disclosure, an illumination device includes: a first sheet including a first light entering main surface, a first light emission main surface, two first light blocking portions disposed at an interval in a first direction, and a first light-transmitting portion disposed between the two first light blocking portions; a second sheet including a second light entering main surface facing the first light emission main surface, a second light emission main surface, and a first lens; and a third sheet including a third light entering main surface facing the second light emission main surface, a third light emission main surface, two second light blocking portions disposed at an interval in the first direction, and a second light-transmitting portion disposed between the two second light blocking portions.

公开(公告)号：US11988910B1

公开(公告)日：2024-05-21

申请号：US18379427

申请日：2023-10-12

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Junichi Masuda ,  Shugo Yagi ,  Akira Hirai ,  Hiroshi Tsuchiya ,  Takashi Satoh ,  Akira Sakai ,  Kiyoshi Minoura

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/1347

CPC classification number: G02F1/1323 ,  G02F1/133528 ,  G02F1/1347

Abstract: A viewing angle-controlling liquid crystal panel sequentially includes a first polarizing plate; a first liquid crystal panel; a second polarizing plate; a second liquid crystal panel; and a third polarizing plate, wherein an azimuthal angle φP1 of the absorption axis of the first polarizing plate, an azimuthal angle φ1 of a director of liquid crystal molecules near the first substrate and an azimuthal angle φ2 of a director of liquid crystal molecules near the second substrate in the first liquid crystal panel, an azimuthal angle φP2 of the absorption axis of the second polarizing plate, an azimuthal angle φ3 of a director of liquid crystal molecules near the third substrate and an azimuthal angle φ4 of a director of liquid crystal molecules near the fourth substrate in the second liquid crystal panel, and an azimuthal angle φP3 of the absorption axis of the third polarizing plate satisfy specific formulas.

公开(公告)号：US11942023B1

公开(公告)日：2024-03-26

申请号：US18233356

申请日：2023-08-14

Applicant: Sharp Display Technology Corporation

Inventor： Junichi Masuda ,  Shugo Yagi ,  Yuuichi Kanbayashi ,  Satoshi Tsubooka

IPC: G09G3/00 ,  G02F1/13357 ,  G09G3/20 ,  G09G3/34

CPC classification number: G09G3/2096 ,  G02F1/133603 ,  G09G3/342 ,  G09G2320/0247 ,  G09G2320/0626 ,  G09G2340/0435 ,  G09G2358/00 ,  G09G2380/10

Abstract: A display device includes a display panel, an illumination device, and a control unit, in which, when performing display in a first display mode, the control unit corrects an image signal to generate a correction signal, writes a first image based on the correction signal in the display panel, leaves a second light source unlit, and selectively turns on a plurality of first light sources based on the correction signal, and when performing display in a second display mode, the control unit generates a correction signal, writes a first image in the display panel, leaves the second light source unlit, and selectively turns on the plurality of first light sources based on the correction signal, in a first display period, and writes a second image based on the image signal in the display panel and turns on at least the second light source, in a second display period.

公开(公告)号：US11899305B2

公开(公告)日：2024-02-13

申请号：US17965816

申请日：2022-10-14

Applicant: Sharp Display Technology Corporation

Inventor： Koji Murata ,  Junichi Masuda ,  Shugo Yagi ,  Hiroshi Tsuchiya ,  Takashi Satoh ,  Shinji Shimada

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1343

CPC classification number: G02F1/133531 ,  G02F1/133514 ,  G02F1/133638 ,  G02F1/134363 ,  G02F1/134372

Abstract: Provided are a liquid crystal panel capable of achieving a small light-shielding angle in a narrow viewing angle mode and a display device including the liquid crystal panel. The liquid crystal panel sequentially includes: a first polarizing plate with a first absorption axis; a first substrate including a first electrode; a liquid crystal layer containing liquid crystal molecules; and a second substrate including a second electrode, wherein in a plan view, a director of the liquid crystal molecules with no voltage applied and the first absorption axis form an angle α of not smaller than 5° and not greater than 20° or not smaller than 65° and not greater than 80°.

公开(公告)号：US20250067922A1

公开(公告)日：2025-02-27

申请号：US18766705

申请日：2024-07-09

Applicant: Sharp Display Technology Corporation

Inventor： Shugo YAGI ,  Junichi Masuda ,  Yuuichi Kanbayashi ,  Satoshi Tsubooka

IPC: F21V8/00

Abstract: An illumination device is provided with a first light source, a first light guide plate including a second main surface, a second light source, a second light guide plate including a fourth main surface, a third light source, an optical member, and a first sheet. The main surfaces of the first light guide plate and the second light guide plate overlap each other and the first light guide plate and the second light guide plate are disposed on the opposite side of the first sheet from the optical member. The first sheet includes two first light blocking portions and a first light-transmitting portion. The first light reflection portion is selectively provided in a first region in the first opposite main surface, and the second light reflection portion is provided at least in a fourth region in the second opposite main surface.

公开(公告)号：US20240351441A1

公开(公告)日：2024-10-24

申请号：US18609941

申请日：2024-03-19

Applicant: Sharp Display Technology Corporation

Inventor： Ryuzo YUKI ,  Naru Usukura ,  Junichi Masuda ,  Shugo Yagi

IPC: B60K35/81 ,  B60K35/65 ,  G02F1/13357

CPC classification number: B60K35/81 ,  B60K35/656 ,  G02F1/133615 ,  B60K2360/336

Abstract: A liquid crystal display device includes a backlight module configured to switch between first light having a maximum luminance in a first direction and second light having a maximum luminance in a second direction different from the first direction and emit the first light and the second light from a main surface, a liquid crystal display panel, and a control device. The control device receives a first image and generates a first offset image based on the first image, the first offset image being an image obtained by reversing a color of the first image and having a luminance adjusted, controls the liquid crystal display panel such that a first display image including the first image and a second display image including the first offset image are alternately displayed, and controls the backlight module so that the first light is emitted when the first display image is displayed and the second light is emitted when the second display image is displayed. A luminance of the first offset image is substantially equal to a luminance in the second direction when the liquid crystal display panel displays the first display image.

公开(公告)号：US12111490B2

公开(公告)日：2024-10-08

申请号：US18213518

申请日：2023-06-23

Applicant: Sharp Display Technology Corporation

Inventor： Yuuichi Kanbayashi ,  Shugo Yagi ,  Junichi Masuda ,  Satoshi Tsubooka

IPC: F21V8/00

CPC classification number: G02B6/0053 ,  G02B6/003 ,  G02B6/0036

Abstract: An illumination device includes a plurality of light sources arranged in a row, a light guide plate having a plate shape and including a first end face at an outer peripheral end face of the light guide plate and a first main surface included in a pair of main surfaces of the light guide plate, the first end face facing the plurality of light sources and being configured to receive incident light, the first main surface being configured to emit light, and a plurality of first lenses disposed at the first main surface, arranged along a first direction, and extending along a second direction, the first direction being an arrangement direction of the plurality of light sources, the second direction intersecting the first direction and extending along the first main surface.

公开(公告)号：US12099229B2

公开(公告)日：2024-09-24

申请号：US18113022

申请日：2023-02-22

Applicant: Sharp Display Technology Corporation

Inventor： Shugo Yagi ,  Junichi Masuda ,  Yuuichi Kanbayashi ,  Satoshi Tsubooka

IPC: F21V8/00

CPC classification number: G02B6/0036 ,  G02B6/0046 ,  G02B6/0053 ,  G02B6/0068 ,  G02B6/0076

Abstract: According to an aspect of the disclosure, an illumination device includes: a first light source; a first light guide plate including at least a part of an outer circumferential end face as a first end face configured to face the first light source and receive incident light, a first main surface, and a second main surface; a first sheet including one main surface as a third main surface configured to face the first main surface and a fourth main surface; a second light source; and a second light guide plate including at least a part of an outer circumferential end face as a second end face configured to face the second light source, a fifth main surface, and a sixth main surface configured to face the fourth main surface.