Composition, light reflecting film, luminance-improving film, backlight unit, and liquid crystal display device
US-2017010398-A1 · Jan 12, 2017 · US
Optical film and optical laminate using same
US10120206B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10120206-B2 |
| Application number | US-201515321473-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 23, 2015 |
| Priority date | Jul 1, 2014 |
| Publication date | Nov 6, 2018 |
| Grant date | Nov 6, 2018 |
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Abstract
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[Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. An optical film, comprising: a light-reflecting layer R comprising a cholesteric liquid crystal layer having a right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer having a left-handed helical orientation, and a polarizing element layer, wherein the polarizing element layer is adhered or bonded to a film comprising the light-reflecting layer R and the light-reflecting layer L, wherein the difference of the center reflection wavelength between the light-reflecting layer R and the light-reflecting layer L is within 20 nm. 2. The optical film according to claim 1 , wherein the light-reflecting layer R is obtained by fixing the cholesteric crystal layer having a right-handed helical orientation and that the light-reflecting layer L is obtained by fixing the cholesteric crystal layer having a left-handed helical orientation. 3. The optical film according to claim 1 , wherein the center reflection wavelengths of the light-reflecting layer R and the light-reflecting layer L are 400 nm-800 nm. 4. The optical film according to claim 1 , wherein the polarizing element comprises a stretched polymer film containing a dichroic pigment. 5. Eyewear comprising the optical film according to claim 1 . 6. Eyewear according to claim 5 , wherein the eyewear is sunglasses, goggles, or a helmet visor. 7. An optical laminate, comprising a light-reflecting layer R comprising a cholesteric liquid crystal layer having a right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer having a left-handed helical orientation, and a polarizing element layer provided between a first support and a second support, wherein the polarizing element layer is adhered or bonded to a film comprising the light-reflecting layer R and the light-reflecting layer L, wherein the difference of the center reflection wavelength between the light-reflecting layer R and the light-reflecting layer L is within 20 nm. 8. The optical laminate according to claim 7 , wherein the light-reflecting layer R is obtained by fixing the cholesteric liquid crystal layer having a right-handed helical orientation and that the light-reflecting layer L is obtained by fixing the cholesteric crystal layer having a left-handed helical orientation. 9. The optical laminate according to claim 7 , wherein the center reflection wavelengths of the light-reflecting layer R and the light-reflecting layer L are 400 nm-800 nm. 10. The optical laminate according to claim 7 , wherein the polarizing element comprises a stretched polymer film containing a dichroic pigment. 11. The optical laminate according to claim 7 , wherein the supports are polycarbonate. 12. Eyewear comprising the optical laminate according to claim 7 . 13. Eyewear according to claim 12 , wherein the eyewear is sunglasses, goggles, or a helmet visor.
Assignees
Inventors
Classifications
Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title
- G02B5/3016Primary
involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title
Colouring materials · CPC title
- G02B5/30Primary
Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title
- G02C7/12Primary
Polarisers · CPC title
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Frequently asked questions
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- What does patent US10120206B2 cover?
- [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.
- Who is the assignee on this patent?
- Nippon Kayaku Kk, Mitsubishi Gas Chemical Co, Mgc Filsheet Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B5/3016. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 06 2018 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).