公开(公告)号：US20250044637A1

公开(公告)日：2025-02-06

申请号：US18754636

申请日：2024-06-26

Applicant: Sharp Display Technology Corporation

Inventor： Hisashi WATANABE ,  Hirotoshi YASUNAGA ,  Masato KURAHASHI

IPC: G02F1/1335 ,  G02F1/1343

Abstract: Provided is a display device with reduced interface reflection and high luminance. The display device includes: a display panel; and a front surface plate disposed closer to an observer side than the display panel is. The display panel in a plan view includes a display region and a frame region surrounding the display region. The front surface plate in a plan view includes a design layer that overlaps the display region. The front surface plate transmits at least part of light incident from the display panel and reflects at least part of light incident from the observer side. A transmittance of a region of the front surface plate overlaps the display region being 50% or higher. The front surface plate and the display panel are attached to each other with an optical adhesive layer. A refractive index of the optical adhesive layer is 1.4 or higher and 1.6 or lower.

公开(公告)号：US20240141139A1

公开(公告)日：2024-05-02

申请号：US18370022

申请日：2023-09-19

Applicant: Sharp Display Technology Corporation

Inventor： Hisashi WATANABE ,  Hirotoshi YASUNAGA

IPC: C08K9/00

CPC classification number: C08K9/00 ,  C08K2201/005

Abstract: Provided is a display device that makes a desired pattern or the like visible in the non-display state and is capable of displaying a display image without allowing perception of the complementary color of the color of the pattern or the like. The display device includes: a dot matrix display panel; and a design layer disposed in front of a front surface side of the display panel. The design layer includes a design part that includes a binder resin and light-reflective colored particles dispersed in the binder resin. The light-reflective colored particles reflect light having a specific wavelength while absorbing light having a wavelength other than the specific wavelength.

公开(公告)号：US20240419034A1

公开(公告)日：2024-12-19

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：US20240126117A1

公开(公告)日：2024-04-18

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

CPC classification number: G02F1/133555 ,  G02F1/133533 ,  H01L25/167 ,  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：US20230168540A1

公开(公告)日：2023-06-01

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

CPC classification number: G02F1/133606 ,  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：US20240385477A1

公开(公告)日：2024-11-21

申请号：US18633417

申请日：2024-04-11

Applicant: Sharp Display Technology Corporation

Inventor： Hisashi WATANABE ,  Hirotoshi YASUNAGA

IPC: G02F1/1335 ,  G02B5/30

Abstract: Provided are a display device and an optical film that are capable of providing vivid reflective display without a decrease in luminance. The display device includes: an optical film; and a display panel placed closer to a back surface side than the optical film is. The optical film includes a colored semi-transparent component and a first linear polarizer or louver film being placed closer to the back surface side than the colored semi-transparent component is and being integrated with the colored semi-transparent component, the louver film including a light absorptive part and a light transmissive part arranged in a pattern. The semi-transparent component is configured to transmit part of light incident from the back surface side and reflect part of light incident from a viewer side opposite to the back surface side.

公开(公告)号：US20240280856A1

公开(公告)日：2024-08-22

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 ,  H01L25/075 ,  H01L33/52 ,  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：US20240176183A1

公开(公告)日：2024-05-30

申请号：US18371788

申请日：2023-09-22

Applicant: Sharp Display Technology Corporation

Inventor： Hirotoshi YASUNAGA ,  Hisashi WATANABE ,  Takeshi MASUDA

IPC: G02F1/13357

CPC classification number: G02F1/133603 ,  G02F1/133605

Abstract: An illumination device includes a plurality of light sources, each having a light-emission surface that faces a side opposite to a display panel; a light-source substrate that has a mount surface on a side opposite to the display panel, and that has light transmissivity, the mount surface being provided for mounting the plurality of light sources thereon; and a reflecting layer that is provided on a side of the light-source substrate opposite to the display panel so as to be spaced from the light-emission surfaces by a predetermined interval, and that reflects toward the light-source substrate light coming from the light sources, wherein the illumination device illuminates the display panel with light.

公开(公告)号：US20240142820A1

公开(公告)日：2024-05-02

申请号：US18370026

申请日：2023-09-19

Applicant: Sharp Display Technology Corporation

Inventor： Hirotoshi YASUNAGA ,  Hisashi WATANABE ,  Takeshi MASUDA

IPC: G02F1/13357 ,  G02F1/1335

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：US20220308399A1

公开(公告)日：2022-09-29

申请号：US17690553

申请日：2022-03-09

Applicant: Sharp Display Technology Corporation

Inventor： Takeshi MASUDA ,  Hisashi WATANABE ,  Hirotoshi YASUNAGA

IPC: G02F1/1335 ,  F21V8/00

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.