Optical device
US-2021003766-A1 · Jan 7, 2021 · US
Display device including a protective layer having a diffusion layer and gaming machine having the same
US11327216B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11327216-B2 |
| Application number | US-202017070967-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 15, 2020 |
| Priority date | Nov 15, 2019 |
| Publication date | May 10, 2022 |
| Grant date | May 10, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A display device according to one or more embodiments may include a lightguide plate comprising a transparent part, and an incident surface, the lightguide plate configured to display at least one pattern; and a light source facing the incident surface. The lightguide plate may include a plurality of prisms on a surface of the lightguide plate, the plurality of prisms being arranged along the at least one pattern to reflect light emitted from the light source and entering the lightguide plate through the incident surface out of the lightguide plate through an emission surface of the lightguide plate, and a transparent protective layer covering at least a part of the emission surface, the protective layer having a smaller refractive index than the lightguide plate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A display device, comprising: a lightguide plate comprising a transparent part, and an incident surface, the lightguide plate configured to display at least one pattern; and a light source facing the incident surface, wherein the lightguide plate further comprises: a plurality of prisms directly on a surface of the lightguide plate, which are arranged along the at least one pattern, thereby forming the at least one pattern and reflect light emitted from the light source and entering the lightguide plate through the incident surface then out of the lightguide plate through an emission surface of the lightguide plate, and a transparent protective layer covering at least a part of the emission surface, the protective layer having a smaller refractive index than the lightguide plate, wherein the protective layer comprises a diffusion layer which is located in a part of the protective layer, is shaped similarly to the at least one pattern and overlaps the at least one pattern as viewed in a direction normal to the emission surface, and the diffusion layer diffuses light emitted through the emission surface. 2. A gaming machine, comprising: a body; and a display device on a surface of the body to face a player, the display device including a lightguide plate comprising a transparent part, and an incident surface, the lightguide plate being configured to display at least one pattern, and a light source facing the incident surface, wherein the lightguide plate further comprises a plurality of prisms directly on a surface of the lightguide plate, which are arranged along the at least one pattern, thereby forming the at least one pattern and reflect light emitted from the light source and entering the lightguide plate through the incident surface then out of the lightguide plate through an emission surface of the lightguide plate to face a player, and a transparent protective layer covering at least a part of the emission surface, the protective layer having a smaller refractive index than the lightguide plate, wherein the protective layer comprises a diffusion layer which is located in a part of the protective layer, is shaped similarly to the at least one pattern and overlaps the at least one pattern as viewed in a direction normal to the emission surface, and the diffusion layer diffuses light emitted through the emission surface.
Assignees
Inventors
Classifications
- G02B6/005Primary
provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title
- G02B6/0036Primary
2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title
using total internal reflection, e.g. in a prism · CPC title
Pachinko · CPC title
Constructional details or arrangements of video game devices not provided for in groups A63F13/20 or A63F13/25, e.g. housing, wiring, connections or cabinets · CPC title
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Frequently asked questions
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- What does patent US11327216B2 cover?
- A display device according to one or more embodiments may include a lightguide plate comprising a transparent part, and an incident surface, the lightguide plate configured to display at least one pattern; and a light source facing the incident surface. The lightguide plate may include a plurality of prisms on a surface of the lightguide plate, the plurality of prisms being arranged along the a…
- Who is the assignee on this patent?
- Omron Tateisi Electronics Co
- What technology area does this patent fall under?
- Primary CPC classification G02B6/005. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 10 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).