Illumination device and display device using the same
US7230603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2003 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Jun 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0261
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device and display device using it display motion pictures without a blur and make a light utilizing efficiency of a backlight improved. An illumination device having a light pipe of a substantially parallel flat-form sheet, whose one surface is an outgoing light surface and a light source unit is placed at one side and both side edges, is equipped with a light axis of lights after having entered the light pipe from the light source unit being unparallel to the outgoing light surface of the light pipe, and a reflection body unit consisting of plural unit reflection bodies divided into m in a vertical direction of the light source unit at an opposite side surface of the outgoing light surface of the light pipe, wherein the reflection body unit can contact and separate from the opposite side surface the outgoing light surface of the light pipe for every unit reflection bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.