Projection LCD having a sheet polarizer with protective layers on both sides thereof
US6094245A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1997 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Oct 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133528
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal projector has a pre-sheet polarizer and an incoming light side sheet polarizer on the incoming light side of a liquid crystal panel. Two sheet polarizers superimposed to each other are stuck on the outgoing light side face of the liquid crystal panel. The degree of polarization of the pre-sheet polarizer is smaller than that of the incoming light side sheet polarizer, so that both the sheet polarizers suitably share the quantity of absorbed light. Similarly, the degree of polarization of the incoming light side one of the sheet polarizers stuck on the outgoing light side face of the liquid crystal panel is smaller than that of the other one, so that both the sheet polarizers suitably share the quantity of absorbed light. With this configuration, the durability of the sheet polarizer is improved and the light output is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.