Solid state white light emitter and display using same
DCFirst Claim
1. A light emission assembly, comprising at least one light emission device including an LED emitting radiation with an emission maximum in a spectral range of the blue to ultraviolet spectrum, and a luminophoric medium impinged by radiation emitted from the LED and responsively emitting radiation in a range of wavelengths, which combine to produce a white light output from the light emission device, wherein said light emission device comprises at least one of the characteristics of:
- (i) the luminophoric medium being coated on and/or dispersed in light-transmissive material enclosing the LED; and
(ii) the luminophoric medium being in contact with an emitting face of the LED.
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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.
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Citations
41 Claims
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1. A light emission assembly, comprising at least one light emission device including an LED emitting radiation with an emission maximum in a spectral range of the blue to ultraviolet spectrum, and a luminophoric medium impinged by radiation emitted from the LED and responsively emitting radiation in a range of wavelengths, which combine to produce a white light output from the light emission device, wherein said light emission device comprises at least one of the characteristics of:
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(i) the luminophoric medium being coated on and/or dispersed in light-transmissive material enclosing the LED; and (ii) the luminophoric medium being in contact with an emitting face of the LED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A light emission assembly, comprising at least one light emission device including an LED emitting radiation with an emission maximum in a spectral range of the blue to ultraviolet spectrum, and a luminophoric medium impinged by radiation emitted from the LED and responsively emitting radiation in a range of wavelengths, which combine to produce a white light output from the light emission device, wherein said light emission device comprises the luminophoric medium being coated on and/or dispersed in light-transmissive material forming a wall of an enclosure in which the LED is disposed.
- 30. A light emission assembly, comprising at least one light emission device including a GaN-based LED die emitting blue light, and a luminophoric medium impinged by blue light emitted from the LED die and responsively emitting radiation in a range of wavelengths, which combine to produce a white light output from the light emission device, wherein the luminophoric medium comprises phosphor material, and wherein (i) a layer of the phosphor material is on an interior or exterior surface of a light-transmissive enclosure defining an interior volume in which the LED die is mounted, and/or (ii) the phosphor material is contiguously arranged about an emitting surface of the LED die, and/or (iii) the phosphor material is in a polymeric matrix overlying the LED die.
Specification