Eyewear for viewing liquid crystal displays
US7393100B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 20, 2005 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Oct 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Eyewear which preferentially transmits light from a liquid crystal display screen using spectral filtering, polarization filtering and/or spatial filtering. The eyewear transmits the relatively narrow red, green, and blue bands of light emitted by the display's fluorescent backlight lamp, while blocking ambient light falling outside of those relatively narrow bands of light. The eyewear can further include polarized lenses oriented at either + or −45 degrees, matching the polarization of the liquid crystal display emission, and thus blocking ambient light not matching that polarization orientation. The glasses can also be tinted except for a central portion matching the shape of the rectangular liquid crystal display screen, and thus preferentially blocking light not originating from the liquid crystal display screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.