High dynamic range displays using filterless LCD(s) for increasing contrast and resolution
US9772530B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2012 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Jul 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display provides increased contrast and resolution via first LCD panel energized to generate an image and a second LCD panel configured to increase contrast of the image. The second panel is an LCD panel without color filters and is configured to increase contrast by decreasing black levels of dark portions of images using polarization rotation and filtration. The second LCD panel may have higher resolution than the first LCD panel. A half wave plate and/or film is placed in between the first and the second panel. The panels may be directly illuminated or edge lit, and may be globally or locally dimmed lights that may also include individual control of color intensities for each image or frame displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.