Light-emitting diode device
First Claim
1. A light-emitting diode device, comprising a light-emitting element for emitting light of blue to green region and a fluorescent substance containing a CaS phosphor activated by Eu for converting a wavelength of the light emitted from the light-emitting element.
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Accused Products
Abstract
A LED device which has an excellent color rendering property and no toxicity and does not bring about an increase in production cost more than necessary, and a covering member used for such a LED device can be provided.
The white LED device comprises a light-emitting element for emitting light of blue to green region and a fluorescent substance containing a red phosphor for converting a wavelength of the light emitted from the light-emitting element. The red phosphor is CaS or activated by Eu or a phosphor expressed by a general formula AEu(1-x)LnxB2O8 wherein A is an element selected from the group consisting of Li, K, Na and Ag; Ln is an element selected from the group consisting of Y, La and Gd; and B is W or Mo; and x is number equal to or larger than 0, but smaller than 1.
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Citations
30 Claims
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1. A light-emitting diode device, comprising
a light-emitting element for emitting light of blue to green region and a fluorescent substance containing a CaS phosphor activated by Eu for converting a wavelength of the light emitted from the light-emitting element.
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14. A light-emitting diode device, comprising
a light-emitting element for emitting light of blue to green region and a fluorescent substance containing a phosphor expressed by a general formula AEu(1-x)LnxB2O8 for converting a wavelength of the light emitted from the light-emitting element, wherein A is an element selected from the group consisting of Li, K, Na and Ag; - Ln is an element selected from the group consisting of Y, La and Gd; and
B is W or Mo; and
x is number equal to or larger than 0, but smaller than 1. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- Ln is an element selected from the group consisting of Y, La and Gd; and
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27. A covering member for covering a light-emitting diode device which includes a light-emitting element sealed by a transparent resin for emitting light of blue to green region, comprising
a base polymer, and a CaS phosphor activated by Eu.
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29. A covering member for covering a light-emitting diode device which includes a light-emitting element sealed by a transparent resin for emitting light of blue to green region, comprising
a base polymer, and a phosphor expressed by a general formula AEu(1-x)LnxB2O8 wherein A is an element selected from the group consisting of Li, K, Na and Ag; - Ln is an element selected from the group consisting of Y, La and Gd; and
B is W or Mo; and
x is number equal to or larger than 0, but smaller than 1. - View Dependent Claims (30)
- Ln is an element selected from the group consisting of Y, La and Gd; and
Specification