COLOR-STABLE PHOSPHOR CONVERTED LED
First Claim
1. A light-emitting device, comprising at least one light-emitting diode (100;
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200;
300) for emitting light of a first color and a luminescent material (102;
202;
302) arranged on said at least one light-emitting diode to receive at least part of the light emitted by said light-emitting diode, characterized in that said light-emitting device further comprises a filter (103;
203;
303) arranged to receive light emitted by said light-emitting diode (101;
201;
301) and transmitted through said luminescent material (102;
202;
302) and to absorb light of said first color; and
said filter (103;
203;
303) comprises a pigment compound distributed in a matrix of silicon and oxygen atoms, in which matrix at least a portion of said silicon atoms are directly bonded to hydrocarbon groups.
6 Assignments
0 Petitions
Accused Products
Abstract
A light-emitting device is provided, comprising at least one light-emitting diode (100) for emitting light of a first color and a luminescent material (102) arranged on said at least one light-emitting diode to receive at least part of the light emitted by said light-emitting diode. The light-emitting device further comprises a filter (103) arranged to receive light emitted by said light-emitting diode (100) and transmitted through said luminescent material (102) and to absorb light of said first color. The filter comprises a pigment compound distributed in a matrix of silicon and oxygen atoms, in which matrix at least a portion of said silicon atoms are directly bonded to hydrocarbon groups.
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Citations
24 Claims
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1. A light-emitting device, comprising at least one light-emitting diode (100;
-
200;
300) for emitting light of a first color and a luminescent material (102;
202;
302) arranged on said at least one light-emitting diode to receive at least part of the light emitted by said light-emitting diode, characterized in that said light-emitting device further comprises a filter (103;
203;
303) arranged to receive light emitted by said light-emitting diode (101;
201;
301) and transmitted through said luminescent material (102;
202;
302) and to absorb light of said first color; andsaid filter (103;
203;
303) comprises a pigment compound distributed in a matrix of silicon and oxygen atoms, in which matrix at least a portion of said silicon atoms are directly bonded to hydrocarbon groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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200;
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17. A method for the manufacture of a light-emitting device, comprising:
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providing at least one light-emitting diode (100) for emitting light of a first color, on which light-emitting diode (100) a luminescent material (102) is arranged to receive at least part of the light emitted by said light-emitting diode; arranging, on said luminescent material (102), a filter (103) by arranging and polymerizing a polymerizable composition on said luminescent material, which polymerizable composition comprises at least an organically modified silane having the general formula R1-trialkoxysilane and a pigment compound in a liquid medium, wherein R1 is selected from the group consisting of aryls and alkyls, and wherein said pigment compound absorbs light of said first color. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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18. A method for the manufacture of a light-emitting device, comprising:
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providing at least one light-emitting diode (200;
300) for emitting light of a first color, on which light-emitting diode (200;
300) a luminescent material (202;
302) is arranged to receive at least part of the light emitted by said light-emitting diode;providing an optical element (204;
304);arranging, on said optical element (204;
304), a filter (203;
303) by arranging and polymerizing a composition on said optical element, which composition comprises at least an organically modified silane having the general formula R1-trialkoxysilane and a pigment compound in a liquid medium, wherein R1 is selected from the group consisting of aryls and alkyls, and wherein said pigment compound absorbs light of said first color; andarranging said optical element (204;
304) such that said filter receives light emitted by said light-emitting diode (200;
300) and transmitted through said luminescent material (202;
302).
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Specification