公开(公告)号：US12174487B1

公开(公告)日：2024-12-24

申请号：US18586741

申请日：2024-02-26

Applicant: Sharp Display Technology Corporation

Inventor： Hirotoshi Yasunaga ,  Hisashi Watanabe

IPC: G02F1/13357 ,  G02F1/133

Abstract: A lighting device includes light sources, a board having a mount surface on which the light sources are arranged, and a reflection member disposed on the mount surface of the board and having a rectangular plan view shape. The reflection member includes insertion holes in each of which at least one of the light sources is disposed and wall portions defining a surface area of the reflection member into reflection areas in a grid. Some of the wall portions surround at least one of the insertion holes. The reflection areas include a first reflection area at a corner portion of the reflection member. The wall portions include one wall portion that is included in the first reflection area and the one wall portion includes a passing portion through which light from one of the light sources that is adjacent to the reflection area via the one wall portion passes.

公开(公告)号：US12158658B2

公开(公告)日：2024-12-03

申请号：US18234607

申请日：2023-08-16

Applicant: Sharp Display Technology Corporation

Inventor： Hisashi Watanabe

IPC: G02F1/1335 ,  H01L25/16 ,  H01L33/60

Abstract: Provided is a display device allowing perception of any design in a non-display state while allowing perception of display images in a display state without hindrance by the design. The display device includes, in the following order from a viewer side: a front plate; and a display panel. The front plate includes: a transflective component; a design layer having a first design and being disposed on or in front of a viewer side of the transflective component; and an inverted design layer disposed on or behind a side opposite to the viewer side of the transflective component. The transflective component transmits light incident on its display panel side and partially reflects light incident on its viewer side. The inverted design layer has a second design overlaid with the first design in a plan view and being an inversion of the first design in terms of brightness or hue.

公开(公告)号：US12111537B2

公开(公告)日：2024-10-08

申请号：US18418899

申请日：2024-01-22

Applicant: Sharp Display Technology Corporation

Inventor： Takeshi Masuda ,  Hisashi Watanabe ,  Hirotoshi Yasunaga

IPC: G02F1/13357 ,  G02F1/1335 ,  H01L25/075 ,  H01L33/00 ,  H01L33/52 ,  H01L33/54 ,  H01L33/60

CPC classification number: G02F1/133605 ,  G02F1/133603 ,  H01L25/0753 ,  H01L33/52 ,  H01L33/60 ,  H01L2933/0058

Abstract: A lighting device includes a substrate, a first conductive portion, a second conductive portion disposed with a spacing as to the first conductive portion, a first reflective layer having a first opening coinciding with the first conductive portion and a second opening coinciding with the second conductive portion, a light-emitting part connected to the first conductive portion through the first opening, a non-light-emitting part connected to the second conductive portion through the second opening, and a second reflective layer. The second reflective layer includes a first reflective portion disposed around the light-emitting part, and a second reflective portion disposed around the non-light-emitting part.

公开(公告)号：US11977293B1

公开(公告)日：2024-05-07

申请号：US18370026

申请日：2023-09-19

Applicant: Sharp Display Technology Corporation

Inventor： Hirotoshi Yasunaga ,  Hisashi Watanabe ,  Takeshi Masuda

IPC: G02F1/1335 ,  F21V8/00 ,  G02F1/13357

CPC classification number: G02F1/133603 ,  G02F1/133605 ,  G02F1/133628

Abstract: An illumination device includes a light source, a first optical member, and a fixing portion. The first optical member includes a light reflection portion configured to reflect light, at least a part of the light reflection portion overlapping with the light source, and a light transmitting portion configured to transmit light, the light transmitting portion not overlapping the light reflection portion. A center of the light source in a plan view is defined as a first center, and a center of the light reflection portion in a plan view is defined as a second center. In the light reflection portion, the second center is located between the fixing portion and the first center at a first temperature, and at a second temperature higher than the first temperature, a position of the second center is closer to the first center than a position of the second center at the first temperature.

公开(公告)号：US11789312B2

公开(公告)日：2023-10-17

申请号：US17987803

申请日：2022-11-15

Applicant: Sharp Display Technology Corporation

Inventor： Hirotoshi Yasunaga ,  Hisashi Watanabe ,  Takeshi Masuda

IPC: G02F1/13357 ,  F21V8/00

CPC classification number: G02F1/133606 ,  G02B6/0076 ,  G02F1/133605 ,  G02F1/133603

Abstract: According to an aspect of the disclosure, a lighting device includes: a plurality of light sources; and a plurality of optical sheets disposed to be stacked at a position away from the plurality of light sources. The plurality of optical sheets include a first optical sheet and a second optical sheet. Each of the first optical sheet and the second optical sheet has a unit region that modulates light emitted from a light source for each of the plurality of light sources. The unit region includes a modulation region including a light source region facing the light source, and having a relatively high modulation action of the light as compared with other regions.

公开(公告)号：US11789311B2

公开(公告)日：2023-10-17

申请号：US17690553

申请日：2022-03-09

Applicant: Sharp Display Technology Corporation

Inventor： Takeshi Masuda ,  Hisashi Watanabe ,  Hirotoshi Yasunaga

IPC: G02F1/13357 ,  F21V8/00 ,  G02F1/1335

CPC classification number: G02F1/133606 ,  G02B6/0055 ,  G02B6/0088 ,  G02F1/133601 ,  G02F1/133603 ,  G02F1/133614 ,  G02F1/133615

Abstract: An illumination device includes a light source, a wavelength conversion sheet configured to perform wavelength conversion on light from the light source, and a first light reduction portion disposed in a frame shape as a whole overlapping an outer peripheral portion of the wavelength conversion sheet in a plan view between the light source and the wavelength conversion sheet, and configured to reduce a light amount of incident light.

公开(公告)号：US20240412701A1

公开(公告)日：2024-12-12

申请号：US18648234

申请日：2024-04-26

Applicant: Sharp Display Technology Corporation

Inventor： Hisashi Watanabe ,  Hirotoshi Yasunaga

IPC: G09G3/34 ,  G02F1/1333 ,  G02F1/13357 ,  G09G3/36

Abstract: Provided is a display device in which a boundary between a display area and a frame area is less noticeable even when a liquid crystal panel is in a black display state. A display device includes: a liquid crystal panel and a backlight. The liquid crystal panel includes: a display area; and a frame area, the front surface plate includes a design layer that overlaps the display area and is configured to transmit at least a part of light incident from the liquid crystal panel and to reflect at least a part of light incident from the observer side, the backlight includes: a third area that overlaps the display area; and a fourth area that overlaps the display area, and a luminance of the fourth area is 50% or less of a luminance of the third area when the backlight is turned on.