LED illuminated waveguide projector display
US-12135447-B2 · Nov 5, 2024 · US
Area light source device
US8939633B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939633-B2 |
| Application number | US-201113172002-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2011 |
| Priority date | Jun 30, 2010 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
An area light source device has a light guide plate including a light incident end face, a light guide plate main body thinner than a thickness of the light incident end face, and a light introducing unit formed in continuation with the light guide plate main body and so that thickness gradually becomes thinner from the light incident end face side towards the light guide plate main body side, a light source arranged at a position facing the light incident end face, a diffuser plate and one or more prism sheets arranged on a surface on a light emission side of the light guide plate main body, and a light shielding sheet arranged on an upper side of the diffuser plate and the prism sheet in a region excluding a light emitting region of the light guide plate main body.
First claim
Opening claim text (preview).
What is claimed is: 1. An area light source device comprising: a light guide plate including: a light incident end face, a light guide plate main body thinner than a thickness of the light incident end face, and a light introducing unit formed in continuation with the light guide plate main body and so that thickness gradually becomes thinner from the light incident end face side towards the light guide plate main body side; a light source arranged at a position facing the…
Assignees
Inventors
Classifications
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G02B6/0028Primary
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8939633B2 cover?
- An area light source device has a light guide plate including a light incident end face, a light guide plate main body thinner than a thickness of the light incident end face, and a light introducing unit formed in continuation with the light guide plate main body and so that thickness gradually becomes thinner from the light incident end face side towards the light guide plate main body side, …
- Who is the assignee on this patent?
- Yabe Mamoru, Shimoda Tomokazu, Masu Yoshiyuki, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G02B6/0028. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).