Solid state white light emitter and display using same
DC CAFCFirst Claim
1. A light emitting device, comprising:
- at least one single-die semiconductor light-emitting diode (LED) coupleable with a power supply to emit a primary radiation which is the same for each single-die semiconductor LED present in the device, said primary radiation being a relatively shorter wavelength radiation outside the visible white light spectrum; and
a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation responsively emits radiation at a multiplicity of wavelengths and in the visible white light spectrum, with said radiation of said multiplicity of wavelengths mixing to produce a white light output.
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Litigations
1 Petition
Reexamination
Accused Products
Abstract
A light emitting assembly comprising a solid state device coupleable with a power supply constructed and arranged to power the solid state device to emit from the solid state device a first, relatively shorter wavelength radiation, and a down-converting luminophoric medium arranged in receiving relationship to said first, relatively shorter wavelength radiation, and which in exposure to said first, relatively shorter wavelength radiation, is excited to responsively emit second, relatively longer wavelength radiation. In a specific embodiment, monochromatic blue or UV light output from a light-emitting diode is down-converted to white light by packaging the diode with fluorescent organic and/or inorganic fluorescers and phosphors in a polymeric matrix.
790 Citations
26 Claims
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1. A light emitting device, comprising:
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at least one single-die semiconductor light-emitting diode (LED) coupleable with a power supply to emit a primary radiation which is the same for each single-die semiconductor LED present in the device, said primary radiation being a relatively shorter wavelength radiation outside the visible white light spectrum; and
a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation responsively emits radiation at a multiplicity of wavelengths and in the visible white light spectrum, with said radiation of said multiplicity of wavelengths mixing to produce a white light output. - View Dependent Claims (2)
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3. A light-emitting device, comprising:
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a semiconductor laser coupleable with a power supply to emit a primary radiation having a relatively shorter wavelength outside the visible light spectrum; and
a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation responsively emits polychromatic radiation in the visible light spectrum, with different wavelengths of said polychromatic radiation mixing to produce a white light output. - View Dependent Claims (4)
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5. A light-emitting device, comprising:
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at least one single-die semiconductor light-emitting diode (LED) coupleable with a power supply to emit a primary radiation which is the same for each single-die LED present in the device, said primary radiation being a relatively shorter wavelength radiation; and
a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation, is excited to responsively emit a secondary, relatively longer wavelength, polychromatic radiation, with separate wavelengths of said polychromatic radiation mixing to produce a white light output. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A liquid crystal display, including:
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a backlight member including a multiplicity of light-emitting devices, each light-emitting device comprising;
at least one single-die semiconductor light-emitting diode (LED) coupleable with a power supply to emit a primary radiation which is the same for each single-die LED present in the device, said primary radiation being a relatively shorter wavelength radiation, and a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation responsively emits a secondary, relatively longer wavelength, polychromatic radiation, with separate wavelengths of said polychromatic radiation mixing to produce a white light output.
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25. A display, including:
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a viewable panel including a multiplicity of light-emitting devices, each light-emitting device comprising;
at least one single-die semiconductor light-emitting diode (LED) coupleable with a power supply to emit a primary radiation which is the same for each single-die semiconductor LED present in the device, said primary radiation being a relatively shorter wavelength radiation, and a down-converting luminophoric medium arranged in receiving relationship to said primary radiation, and which in exposure to said primary radiation responsively emits a secondary, relatively longer wavelength, polychromatic radiation, with separate wavelengths of said polychromatic radiation mixing to produce a white light output.
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26. A light-emission device, comprising
a single-die, two-lead semiconductor light-emitting diode emitting radiation; - and
a recipient down-converting luminophoric medium for down-converting the radiation emitted by the light-emitting diode, to a polychromatic white light.
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Specification