Nitride phosphor, method for producing this nitride...

Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C313S503000, C257S098000

Reexamination Certificate

active

07854859

ABSTRACT:
A red phosphor with excellent luminescent characteristics, and a light emitting device that uses this phosphor are provided. The phosphor is a nitride phosphor that is activated by europium, and absorbs light from the near ultraviolet range to the blue range to emit red light. The nitride phosphor has the following general formula,in-line-formulae description="In-line Formulae" end="lead"?MwAlxSiyBzN((2/3)w+x+(4/3)y+z):Eu2+in-line-formulae description="In-line Formulae" end="tail"?where M is at least one element selected from the group consisting of Mg, Ca, Sr and Ba. In the general formula, w, x, y and z fall within the following ranges.0.056≦w≦9, x=1, 0.056≦y≦18, and 0.0005≦z≦0.5In addition, the mean particle diameter of the nitride phosphor is preferably not less than 2 μm and not more than 15 μm. Additionally, the light emitting device includes a light source with a first light emission spectrum that emits light from the near ultraviolet range to the blue range, and one or more kinds of phosphors that absorb at least part of the first light emission spectrum and thus emit light with a second light emission spectrum. The aforementioned phosphor can be used as the phosphors.

REFERENCES:
patent: 7252788 (2007-08-01), Nagatomi et al.
patent: 7273568 (2007-09-01), Nagatomi et al.
patent: 7476338 (2009-01-01), Sakane et al.
patent: 155047 (1985-09-01), None
patent: 1278250 (2003-01-01), None
patent: 1296376 (2003-03-01), None
patent: 1433831 (2004-06-01), None
patent: 60-206889 (1985-10-01), None
patent: 2003-124527 (2003-04-01), None
patent: 2003-147351 (2003-05-01), None
patent: 2003-206481 (2003-07-01), None
patent: 2003-321675 (2003-11-01), None
patent: 2004-182780 (2004-07-01), None
patent: 2004-182781 (2004-07-01), None
patent: 2006-8862 (2006-01-01), None
patent: 2006-008889 (2006-01-01), None
patent: 2006-63214 (2006-03-01), None
patent: WO 01-40403 (2001-06-01), None
patent: PCT/JP2005/024134 (2006-05-01), None
International Preliminary Report on Patentability, PCT/JP2005/024134, mailed Jul. 3, 2007.
K.Uheda et al., “The crystal structure and Photoluminescence Properties of a New Red Phosphor, Calcium Aluminum Silicon Nitride doped with Divalent Europium”, 206th Meeting, The Electrochemical Society (Abstract 2073), XP-002592218.
Extended European Search Report for corresponding EP Application No. 05844881.2 - 2111, Aug. 25, 2010.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Nitride phosphor, method for producing this nitride... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nitride phosphor, method for producing this nitride..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nitride phosphor, method for producing this nitride... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4234599

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.