Light-emitting device, white light-emitting device, illuminator, and image display
US8232717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2006 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Dec 13, 2028 |
Classification
- Technology area (CPC —)General
Abstract
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x1(17.5) and the color coordinate y1(17.5) of the light emitted at a driving current density of 17.5 A/cm2 and the color coordinate x1(70) and the color coordinate y1(70) of the light emitted at a driving current density of 70 A/cm2 satisfy the following Expressions (D) and (E):−0.006≦x1(17.5)−x1(70)≦0.006 (D),−0.006≦y1(17.5)−y1(70)≦0.006 (E).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.