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AssigneeGeneral Electric Company
InventorsThomas Frederick Soules, William Winder Beers, Alok Mani Srivastava, Lionel Monty Levinson, Anil Raj Duggal
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The invention relates to a light source comprising a phosphor composition 14 and a light emitting device 12 such as an LED or a laser diode 32. The phosphor composition 14 absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO3:Ce3+,Tb3+; BaMgAl10O17:Eu2+,Mn2+; (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+; and Y3Al5O12—Ce3+; and at least one of: Y2O2S:Eu3+,Bi3+; YVO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; and (Ca,Sr)S:Eu2+. The phosphor composition 14 and the light source 12 together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.
A phosphor composition which absorbs radiation having a first spectrum and emits radiation having a second spectrum, the phosphor composition comprising:
A lamp comprising:
A method for producing white light comprising the steps of:
A light-emitting device comprising a blue light-emitting laser diode covered with a phosphor-containing covering, the phosphor-containing covering containing a green-emitting phosphor and a red-emitting phosphor, the green and red-emitting phosphors being excitable by said blue light-emitting laser diode, the green and red-emitting phosphors each having a full width half maximum value of less than 60.
A light emitting device comprising:
Dependencies are inferred from the claim text.