Direct-lit liquid crystal displays with laminated diffuser plates
US7446827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2004 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Sep 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/086
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a directly-illuminated liquid crystal display (LCD), for example an LCD monitor or an LCD-TV, a number of light management films, including a diffuser layer, lie between the light source and the LCD panel to provide bright, uniform illumination. The diffuser layer is attached to a substrate which is separate from the light source and the LCD panel, or may be attached to either the LCD panel or, when using a two dimensional light source, to the light source. The other light management layers may also be attached to the separate substrate or to the LCD panel or two-dimensional light source. High levels of illumination uniformity at the LCD may be achieved with a uniform (non-patterned) diffuser, even with relatively low levels of diffusion, when the diffuser is used with a brightness enhancing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.