公开(公告)号：US20230417978A1

公开(公告)日：2023-12-28

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 ,  G02B6/0036 ,  G02B6/003

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：US20230129697A1

公开(公告)日：2023-04-27

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

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：US20250076562A1

公开(公告)日：2025-03-06

申请号：US18799089

申请日：2024-08-09

Applicant: Sharp Display Technology Corporation

Inventor： Junichi MASUDA ,  Shugo YAGI ,  Satoshi TSUBOOKA ,  Yuuichi KANBAYASHI

IPC: F21V8/00 ,  G02F1/13357

Abstract: An illumination device includes a light source, a light guide plate including a first end face that is at least some of an outer peripheral end face of the light guide plate, a first main surface that is one main surface of the light guide plate, and a second main surface that is the other main surface of the light guide plate, a first prism sheet including a third main surface that is one main surface of the first prism sheet and disposed to face the second main surface and a fourth main surface that is the other main surface of the first prism sheet, the second main surface of the light guide plate is provided with a first inclined surface that is an inclination rising from a side opposite to the light source side toward the light source side in a first direction, the fourth main surface of the first prism sheet is provided with a plurality of first prisms extending along the first direction and disposed along a second direction, and the first prism includes a first base parallel to the second direction, and a pair of first oblique sides rising from both ends of the first base.

公开(公告)号：US20250067923A1

公开(公告)日：2025-02-27

申请号：US18777605

申请日：2024-07-19

Applicant: Sharp Display Technology Corporation

Inventor： Shugo YAGI ,  Junichi MASUDA ,  Yuuichi KANBAYASHI ,  Satoshi TSUBOOKA

IPC: F21V8/00

Abstract: An illumination device includes a first light source, a first light guide plate, a first sheet, a second light source, and a second light guide plate. The first sheet at least includes two first light blocking portions, and a first light-transmitting portion. A second opposite main surface of the second light guide plate includes a first inclined surface and a second inclined surface. The first inclined surface has an inclination rising from a side opposite to a second LED toward the second LED side in the first direction. An angle of the first inclined surface with respect to the first direction is a first angle that is greater than 27°, and an angle of the second inclined surface with respect to the first direction is a second angle that is greater than the first angle and smaller than 58°.

公开(公告)号：US20240160052A1

公开(公告)日：2024-05-16

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：US20240112619A1

公开(公告)日：2024-04-04

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: G09G3/20 ,  G02F1/13357 ,  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：US20230296821A1

公开(公告)日：2023-09-21

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.

公开(公告)号：US20230273362A1

公开(公告)日：2023-08-31

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: G02B6/003 ,  G02B6/0053 ,  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：US20220268987A1

公开(公告)日：2022-08-25

申请号：US17675276

申请日：2022-02-18

Applicant: Sharp Display Technology Corporation

Inventor： Yuuichi KANBAYASHI ,  Shugo YAGI ,  Satoshi TSUBOOKA

IPC: F21V8/00

Abstract: A backlight device includes at least a plurality of LEDs arranged in a row, a light guide plate including at least a light entering end face having a plate shape, and a light refracting portion configured with a plurality of unit light refracting portions arranged side by side on the light entering end face along an alignment direction of the plurality of LEDs, wherein in the light refracting portion, an occupancy rate occupied by the unit light refracting portion in an end side portion of the light entering end face in the alignment direction is made lower than an occupancy rate occupied by the unit light refracting portion in a central side portion of the light entering end face in the alignment direction.