Backlight unit and display device
US-2024142692-A1 · May 2, 2024 · US
Collimating light injectors for edge-lit backlights
US9028108B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9028108-B2 |
| Application number | US-60089808-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 19, 2008 |
| Priority date | May 20, 2007 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Illumination devices whose function are to inject light into backlights, particularly into backlights that incorporate a recycling cavity formed by a front ( 50 ) and back ( 52 ) reflector, are described. In some embodiments, the device includes a light source ( 59 ) disposed proximate the back reflector, and first ( 42 ) and second ( 44 ) reflecting structures. The first reflecting structure includes an inner reflective surface ( 41 b ) at least a portion of which is inclined to form a wedge with the back reflector. The wedge partially collimates and directs light from the light source generally away from the recycling cavity. The second reflecting structure receives light exiting the wedge and redirects such light into an injection beam directed into the recycling cavity.
First claim
Opening claim text (preview).
What is claimed is: 1. An illumination device for injecting light into a hollow light recycling cavity formed by a front and back reflector, the front reflector being partially transmissive to provide an extended output area, the device comprising: a light source disposed proximate the back reflector; a first reflecting structure disposed between the front and back reflector, and having an inner reflective surface at least a portion of which is inclined relative to the back refl…
Assignees
Inventors
Classifications
Physics · mapped topic
Physics · mapped topic
- G02B6/0031Primary
Physics · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9028108B2 cover?
- Illumination devices whose function are to inject light into backlights, particularly into backlights that incorporate a recycling cavity formed by a front ( 50 ) and back ( 52 ) reflector, are described. In some embodiments, the device includes a light source ( 59 ) disposed proximate the back reflector, and first ( 42 ) and second ( 44 ) reflecting structures. The first reflecting structure i…
- Who is the assignee on this patent?
- Hoffend Jr Thomas R, Freier David G, Biernath Rolf W, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification G02B6/0031. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 12 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).