Single lens glare-reducing eyewear without causing lcd screen blackout
US-2016377889-A1 · Dec 29, 2016 · US
Optical film for eyewear, and optical laminate and eyewear using the optical film
US2019049754A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019049754-A1 |
| Application number | US-201816152904-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 5, 2018 |
| Priority date | Apr 8, 2016 |
| Publication date | Feb 14, 2019 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An optical film for eyewear includes a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the light control layer is a quarter wave plate.
First claim
Opening claim text (preview).
What is claimed is: 1 . An optical film for eyewear comprising a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer, the light reflection layer including a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range; and the light control layer being a quarter wave plate. 2 . The optical film for eyewear according to claim 1 , wherein two or more light reflection layers are laminated; and each of the two or more laminated light reflection layers reflects circularly polarized light in an identical direction. 3 . The optical film for eyewear according to claim 1 , wherein a slow axis of the light control layer is arranged in a direction in which s-polarized light incident on the light control layer is converted into circularly polarized light in a direction the same as the direction of circularly polarized light reflected by the light reflection layer. 4 . An optical laminate comprising a first support body, a second support body, and the optical film for eyewear according to claim 1 arranged between the first support body and the second support body. 5 . The optical laminate according to claim 4 , wherein the first support body and the second support body are each a substrate formed of a plastic material. 6 . Eyewear comprising the optical film according to claim 1 . 7 . The eyewear according to claim 6 , the eyewear being protection glasses for use after a cataract operation. 8 . Eyewear comprising the optical laminate according to claim 4 .
Assignees
Inventors
Classifications
Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title
- G02C7/12Primary
Polarisers · CPC title
Laminated or compound lenses · CPC title
used for attenuating light intensity, e.g. comprising rotatable polarising elements · CPC title
involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title
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- What does patent US2019049754A1 cover?
- An optical film for eyewear includes a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the light control layer is a qua…
- Who is the assignee on this patent?
- Nippon Kayaku Kk
- What technology area does this patent fall under?
- Primary CPC classification G02C7/12. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Feb 14 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).