White phosphor, light emission device including the same, and liquid crystal display device including the light emission device as backlight unit
US7839468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | May 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/63
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A white phosphor, a light emission device including the same, and a liquid crystal display (LCD) including the light emission device as a backlight unit. The white phosphor includes: 40 to 50 parts by weight of a blue phosphor selected from the group consisting of ZnS:(Ag,Cl), ZnS:(Ag,Al), ZnS:(Ag,Al,Cl), and a combination thereof; 23 to 36 parts by weight of a green phosphor including (Sr1-xCax)Ga2S4:Eu (0≦x<0.2) and a compound selected from the group consisting of ZnS:(Cu,Al), ZnS:(Cu,Au,Al), and a combination thereof; and 20 to 30 parts by weight of a red phosphor selected from the group consisting of Y2O3:Eu, Y2O3:(Eu,Tb), Y2O2S:Eu, Y2O2S:(Eu,Tb), and a combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.