Light scattering guiding light source device and liquid crystal display
US6322225A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1996 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Aug 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light scattering guiding light source device with a good directionality, having a simplified construction and usable for a backlight source of a liquid crystal display device and the like. A fluorescent lamp is arranged on one lateral surface side of a wedge shaped light scattering guide of an emitting directionality. A light emitting direction correcting element having a line shaped prism face is disposed on a light output surface side of the light scattering guide. A surface light source device using a flat surface of the light emitting direction correcting element as a brightened light can be obtained. Any particular treatment for producing an intensive light scattering such as a light dispersing ink pattern or an irregular diffusing surface or the like, is not provided on a back surface of the light scattering guide. A silver foil sheet is arranged opposing the back surface as a reflection portion having a regular reflection property. Thereby, a light which is emitted along the light output surface is reduced and a directionality of an illuminating light flux is improved. In addition, the liquid crystal display panel arranged on the upper portion provides a liquid crystal dis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.