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Light redirecting film and display system incorporating same
US9229239B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9229239-B2 |
| Application number | US-201414186363-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 21, 2014 |
| Priority date | Jun 2, 2009 |
| Publication date | Jan 5, 2016 |
| Grant date | Jan 5, 2016 |
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- Title
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- Abstract
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Abstract
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Light redirecting film is disclosed. The light redirecting film includes a first major surface that includes a plurality of first microstructures that extend along a first direction. The light redirecting film also includes a second major surface that is opposite to the first major surface and includes a plurality of second microstructures. The second major surface has an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%. The light redirecting film has an average effective transmission that is not less than about 1.75.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical film comprising a structured major surface comprising geometrical symmetry and asymmetric slope distribution, wherein no more than about 7% of the structured major surface has a slope magnitude greater than about 3.5 degrees or no more than about 4% of the structured major surface has a slope magnitude greater than about 5 degrees. 2. An optical film comprising a structured major surface comprising geometrical symmetry and asymmetric slope distribution, the optical film having an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%. 3. An optical film comprising a structured major surface comprising geometrical asymmetry and symmetric slope distribution, wherein no more than about 7% of the structured major surface has a slope magnitude greater than about 3.5 degrees or no more than about 4% of the structured major surface has a slope magnitude greater than about 5 degrees. 4. An optical film comprising a structured major surface comprising geometrical asymmetry and symmetric slope distribution, the optical film having an optical haze that is not greater than about 3% and an optical clarity that is not greater than about 85%.
Assignees
Inventors
Classifications
- G02B6/0053Primary
Prismatic sheet or layer; Brightness enhancement element, sheet or layer · CPC title
Diffusing elements; Afocal elements · CPC title
Physics · mapped topic
- G02B5/045Primary
Prism arrays · CPC title
having particular optical properties · CPC title
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Frequently asked questions
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- What does patent US9229239B2 cover?
- Light redirecting film is disclosed. The light redirecting film includes a first major surface that includes a plurality of first microstructures that extend along a first direction. The light redirecting film also includes a second major surface that is opposite to the first major surface and includes a plurality of second microstructures. The second major surface has an optical haze that is n…
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification G02B6/0053. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 05 2016 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).