Light emitting device including light emitting element with phosphor
First Claim
1. A light emitting device comprising:
- a light emitting element;
a molded member surrounding said light emitting element; and
a sealing member that covers said light emitting element, the sealing member containing;
a phosphor that is excited by light of said light emitting element and that emits luminescent radiation, and afiller material that contains at least one selected from the group consisting of neodymium hydroxide, neodymium aluminate and neodymium silicate, whereinsaid phosphor contains at least one selected from the group consisting of (Lu, Y, Gd)3(Al, Ga)5O12;
Ce, (Sr, Ca)AlSiN3;
Eu, (Ba, Sr, Ca)2SiO4;
Eu, Ca8MgSi4O16Cl2;
Eu, and Sr4Al14O25;
Eu, anda light emission intensity of the light emitting element decreases substantially for wavelengths between 580 to 600 nm and is at its maximum at around a wavelength of 630 nm.
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Abstract
A light emitting device includes a light emitting element, a molded member, and a sealing member. The light emitting element is arranged on or above the molded member. The sealing member covers the light emitting element. The sealing member contains a phosphor, and a filler material. The phosphor can be excited by light of the light emitting element, and emit luminescent radiation. The filler material contains neodymium hydroxide, neodymium aluminate or neodymium silicate. The filler material absorbs a part of the spectrum of the mixed light of the light emitting element and the phosphor so that the other parts of the spectrum of this mixed light are extracted from the light emitting device.
15 Citations
13 Claims
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1. A light emitting device comprising:
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a light emitting element; a molded member surrounding said light emitting element; and a sealing member that covers said light emitting element, the sealing member containing; a phosphor that is excited by light of said light emitting element and that emits luminescent radiation, and a filler material that contains at least one selected from the group consisting of neodymium hydroxide, neodymium aluminate and neodymium silicate, wherein said phosphor contains at least one selected from the group consisting of (Lu, Y, Gd)3(Al, Ga)5O12;
Ce, (Sr, Ca)AlSiN3;
Eu, (Ba, Sr, Ca)2SiO4;
Eu, Ca8MgSi4O16Cl2;
Eu, and Sr4Al14O25;
Eu, anda light emission intensity of the light emitting element decreases substantially for wavelengths between 580 to 600 nm and is at its maximum at around a wavelength of 630 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification