Color generation device having first and second birefringence media for generating improved color by increasing tendency of linear-polarization and method for the same
US10746912B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 2, 2016 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | May 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color generation device 1000 according to the present invention has a light source 8, and also has a linear polarizing means 10, a first birefringence medium 30a and a second birefringence medium 30b attached to each other in sequence in front of the light source 8. A display means 500 is provided which is distanced from the linear polarizing means 10, the first birefringence medium 30a and a second birefringence medium 30b. The first birefringence means 30a is arranged for the principal axes thereof to be at angle of 45° or −45° with respect to the polarization direction a1 of the linear polarizing means 10 and the second birefringence medium 30b is arranged for the principal axes thereof to be the same as or perpendicular to polarization direction a1 of the linear polarizing means 10 and quarter wave plate is used therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.