Display device and electronic timepiece
US6147937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Aug 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133621
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device including a color polarizer (11), a liquid-crystal panel (8) and a polarizing splitter (32). The color polarizer (11) transmits all wavelengths (arrows Q and S) or a specific wavelength of a light ray (arrows P and R) depending on the direction of the polarization axis of the linearly polarized light ray. The polarizing splitter (32) transmits a light ray linearly polarized in one direction (arrows Q and R) and reflects the remainder of the linearly polarized light rays. A reflective display presents two display states depending on light paths P and S, and a transmissive display presents two display states depending on light paths T and U, and in either case, a multi-color display is obtained. Since the light reflection from the polarizing splitter is used during a reflective displaying, a bright display results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.