Color separating backlight
US5748828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1997 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Jan 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0053
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight for use in a flat panel display backlight consists of three components, (1) a collimating means, optically coupled to a waveguide suitable for transmitting light, which collimates white light and directs the light at an angle to the normal (perpendicular) direction to the surface of the flat panel display, (2) diffraction means that extend across the entire display between the collimating means and the flat panel, which angularly separates the white light into red, green and blue components, and (3) light directing means, also extending across the entire display between the diffraction means and the flat panel display, for focusing the red, green and blue light components onto the individual red, green and blue color subpixels of the LCD in an aligned fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.