Sculptured transflector for dual mode active matrix liquid crystal display backlight
US6039451A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133626
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a backlight and avionics display using the same to provide light to a liquid crystal display (LCD) device. In the backlight, a day mode light source positioned on a first side of the LCD device and adapted to provide a first source of light for use by the LCD device during day mode operations. A night mode light source positioned on the first side of the LCD device is adapted to provide a second source of light for use by the LCD device during night mode operations. A sculptured transflector positioned between the day mode light source and the night mode light source has, at a first side adjacent the day mode light source, a transflective material and a plurality of arcuate or parabolic surfaces in order to maximize a percentage of light from the day mode light source which is reflected toward the LCD device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.