Optical film
US9310619B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 15, 2013 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Feb 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13363
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet (5) of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (13), a ¼ wavelength plate (11), and a polarized-light separating element (12), the plurality of first prisms (13) each having (i) a first surface (13a) through which light enters the first prism and (ii) a second surface (13b) that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism (14) that reflects light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.