Illuminating device and projection display device using the same
US8708499B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2009 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illuminating device includes: light source (101); light guiding means (102) where light from light (101) is supplied to one end surface, and light incident from the one end surface is propagated inside to exit from the other end surface; illuminating optical systems (103 to 107) that form an optical image formed on the other end surface of light guiding means (102) on display element (22); reflective polarizing plate (109) that is located between illuminating optical systems (103 to 107) and display element (12), and transmits first polarized light while reflecting second polarized light whose polarized state is different from the first polarized light toward illuminating optical systems (103 to 107); phase plate (108) located between light guiding means (102) and reflective polarizing plate (109); and reflecting means (21) that is located on a side opposite the one end surface of light guiding means (102), and reflects, among lights by reflective polarizing plate (109), light incident via phase plate (108), illuminating optical systems (103 to 107), and light guiding means (102) toward the one end surface of light guiding means (102). The light emitting center of light source (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.