Surface light source device and adjusting method of chromaticity thereof
US6508564B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Nov 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/812
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In this surface light source device, light is incident from a plurality of point light sources 2 arranged on a one side end surface of a light guide plate 1, is reflected on a light reflecting surface 11 on a rear surface of the light guide plate 1, and is emitted from a front surface of the light guide plate 1. The point light sources 2 comprise white light emitting diode elements. Two white light emitting diode elements out of six of the white light emitting diode elements having chromaticity outermost from a center of an aimed chromaticity range in opposite hue directions are arranged in an approximately center of a group of the white diode elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.