Phosphors for light generation from light emitting semiconductors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 3, 2001
Grant Date -
N/A
app pub date -
May 26, 2000
filing date -
Feb 6, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The phosphor A.sub.2 DSi.sub.2 O.sub.7 :Eu.sup.2+, where A is at least one of Ba, Sr, Ca and D is Mg and Zn absorbs UV light, for example from an LED, and converts the UV light to green light. The phosphor can be combined with a red phosphor such as Y.sub.2 O.sub.3 :Eu.sup.3+,Bi.sup.3+ and one or more blue phosphors such as SECA ((Sr,Ba,Ca).sub.5 (PO.sub.4).sub.3 Cl:Eu.sup.2+) and BAM (BaMg.sub.2 Al.sub.16 O.sub.27 :Eu.sup.2+) to produce white light. Also, a light emitting apparatus is disclosed which comprises at least one of a red, green and blue phosphor for absorbing and converting ultraviolet radiation from a light emitting semiconductor into visible light. A laser diode can be used to activate the phosphors to provide improved efficiency and brightness.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully