Red phosphor and method of preparing the same, and red light...

Details Red phosphor and method of preparing the same, and red light... Red phosphor and method of preparing the same, and red light...

2004-11-01

2008-12-02

Williams, Joseph L. (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C252S30140R

Reexamination Certificate

active

07459846

ABSTRACT:
Provided is a red phosphor represented by formula 1:in-line-formulae description="In-line Formulae" end="lead"?(Li(2-z)-xMx)(MoO4)y:Euz,Smq  (1)in-line-formulae description="In-line Formulae" end="tail"?where M is an element selected from K, Mg, Na, Ca, Sr, and Ba, 0≦x≦2, 0.5≦y≦5, 0.01≦z≦1.5, and 0.001≦q≦1.0. The red phosphor has emission characteristics such as high brightness when excited by, in particular, an excitation light source of around 405 nm. The red phosphor is 6 times brighter than conventional phosphors. Furthermore, the red phosphor can be used in a red light emitting diode (LED) that has a UV excitation light source, a white LED, and an active dynamic liquid crystal device (LCD). In addition, the white LED using the red phosphor has a color rendering index of 90 or greater and so has excellent color rendition.

REFERENCES:
patent: 2004/0245532 (2004-12-01), Maeda et al.
patent: 2006/0017365 (2006-01-01), Nagatomi et al.
patent: 52-010881 (1977-01-01), None
patent: 4-104099 (1992-04-01), None
patent: 2003-41252 (2003-02-01), None
patent: 2003-0033864 (2003-05-01), None
patent: 03/018713 (2003-03-01), None
patent: 03/032407 (2003-04-01), None
Cheng-Huang Kuo et al., “n-UV+Blue/Green/Red White Light Emitting Diode Lamps,”Japan J. Appl. Phys., Apr. 2003, pp. 2284-2287, vol. 42.
J.K. Sheu et al., “White-Light Emission from Near UV InGaN-GaN LED Chip Precoated with Blue/Green/Red Phosphors,”IEEE Photonics Technology Letters, Jan. 2003, pp. 18-20, vol. 15, No. 1.
European Search Report for EP 04 25 6679, dated Feb. 8, 2005.
Official Action issued by the Japanese Patent Office in corresponding JP Patent Application No. 2004-316453, Jun. 12, 2007; and English translation thereof.
Office Action from Chinese Intellectual Property Office dated Apr. 4, 2008, with translation.

Affiliated with

Also associated with

Rating

Red phosphor and method of preparing the same, and red light... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Red phosphor and method of preparing the same, and red light..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Red phosphor and method of preparing the same, and red light... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4036132