Display apparatus comprises three polarizers and a polarization control element whose orientation of a transmission axis changes according to a control signal
US8248555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2009 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present application provides a display apparatus including: a display panel having a plurality of pixels disposed in a matrix; a first polarizer; a second polarizer; a surface emitting light source; a third polarizer; and a polarization control element whose orientation of a transmission axis changes according to a control signal. A control section outputs a control signal that controls orientation of the transmission axis of the polarization control element so that a polarization axis of transmission light of the polarization control element is oriented in a direction crossing the transmission axis of the first polarizer in a part corresponding to a pixel position of black display and is oriented in a direction parallel to the transmission axis of the first polarizer in a part corresponding to a pixel position of white display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.