Neon discharge lamp for generating amber light
First Claim
Patent Images
1. A rare gas discharge lamp for generating amber light comprising:
- an envelope formed of a light transmissive material, the envelope having a wall defining an enclosed volume, a first electrode extending through the wall to contact the enclosed volume, a second electrode extending through the wall to contact the enclosed volume, the electrodes being sufficiently separated for producing a discharge therebetween, a neon gas fill contained within the enclosed volume, a pulse generator connected to the first and second electrodes for forming a discharge to electrically stimulate the neon gas fill; and
a phosphor coating enclosed in the envelope;
the phosphor coating comprising a phosphor formulated according to a general formula;
space="preserve" listing-type="equation">Y.sub.3-(a+b+c) Ce.sub.a M.sub.b V.sub.c Al.sub.5 O.sub.12where M is Gd or La;
V are lattice vacancies;
0.01≦
a≦
0.08;
0.60≦
b≦
2.4; and
0≦
c≦
0.1.
1 Assignment
0 Petitions
Accused Products
Abstract
A neon gas discharge lamp is provided which produces an acceptable amber color emission for automotive applications. The red emission from the neon discharge when the lamp is operated in a pulsed mode is combined with a green emission from a substituted Y3 Al15 O12 :Ce phosphor coated on the interior surface of the lamp. The resulting amber emission meets both SAE and ECE amber color requirements. In particular, phosphor has the general formula:
Y.sub.3-(a+b+c) Ce.sub.a M.sub.b V.sub.c Al.sub.5 O.sub.12
where M is Gd or La;
V are lattice vacanies;
0.01≦a≦0.08;
0.60≦b≦2.4; and
0≦c≦0.1.
13 Citations
23 Claims
-
1. A rare gas discharge lamp for generating amber light comprising:
-
an envelope formed of a light transmissive material, the envelope having a wall defining an enclosed volume, a first electrode extending through the wall to contact the enclosed volume, a second electrode extending through the wall to contact the enclosed volume, the electrodes being sufficiently separated for producing a discharge therebetween, a neon gas fill contained within the enclosed volume, a pulse generator connected to the first and second electrodes for forming a discharge to electrically stimulate the neon gas fill; and a phosphor coating enclosed in the envelope;
the phosphor coating comprising a phosphor formulated according to a general formula;
space="preserve" listing-type="equation">Y.sub.3-(a+b+c) Ce.sub.a M.sub.b V.sub.c Al.sub.5 O.sub.12where M is Gd or La; V are lattice vacancies; 0.01≦
a≦
0.08;0.60≦
b≦
2.4; and0≦
c≦
0.1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for producing amber light, comprising:
-
operating a rare gas discharge lamp in a pulsed mode; the lamp having an envelope formed of a light transmissive material, the envelope having a wall defining an enclosed volume, a first electrode extending through the wall to contact the enclosed volume, a second electrode extending through the wall to contact the enclosed volume, the electrodes being sufficiently separated for producing a discharge therebetween, a neon gas fill contained within the enclosed volume, a pulse generator connected to the first and second electrodes for forming a discharge to electrically stimulate the neon gas fill; and a phosphor coating enclosed in the envelope;
the phosphor coating comprising a phosphor formulated according to a general formula;
space="preserve" listing-type="equation">Y.sub.3-(a+b+c) Ce.sub.a M.sub.b V.sub.c Al.sub.5 O.sub.12where M is Gd or La; V are lattice vacanies; 0.01≦
a≦
0.08;0.60≦
b≦
2.4; and0≦
c≦
0.1. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method for producing amber light, comprising:
- stimulating neon gas to emit ultraviolet light and red light in the presence of a green emitting phosphor, the ultraviolet light causing the emission of green light from the phosphor, the green and red light combining to form an amber light, and the phosphor comprising a gadolinium or lanthanum substituted cerium activated yttrium aluminum garnet.
- View Dependent Claims (20, 21, 22, 23)
Specification