Liquid crystal displays with repositionable front polarizers
US6642977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jun 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/0283
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention includes electronic devices having liquid crystal display modules and repositionable front polarizers. A viewer views the display module through a front polarizer, which can be repositioned to change the display appearance, enhance the display contrast, invert the image, increase ambient light exposure, provide privacy, or the like. Repositionable front polarizers can be tiltably and/or rotatably mounted in front of the display module, or can be remotely located, for example on a pair of polarizing eye glasses. The present invention also includes reflective liquid crystal displays that have internal front light guides disposed between a liquid crystal cell and a front polarizer. As such, the light from the front light guide can illuminate the liquid crystal cell without being attenuated by the front polarizer, resulting in a brighter front lit display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.