Compact microdisplay illumination system
US6256151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Jun 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/283
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A miniature display system has light source, display panel, polarized beam reflector film, curved reflector, and quarter wave film. The light source supplies light polarized in a first direction. The light from the light source reflects off the polarized beam reflector film and impinges the display panel. The polarized beam reflector film is configured to reflect light polarized in the first direction but pass the light polarized in a second direction orthogonal to the first direction. The display panel produces images on its surface ("display surface"). The light hitting the display panel is reflected orthogonally (polarized in a second direction) and bearing the image, thus bearing a pattern. The modulated light passes through the polarized beam reflector film and is reflected on a curved reflector. The quarter wave film is disposed between the polarized beam reflector film and the curved reflector. Thus, the modulated light, traversing from the polarized beam reflector film toward the curved reflector and back, is rotated 90 degrees, thereby becoming polarized in the first direction. Then rotated light reflects off the polarized beam reflector film toward viewing area The displa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.