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Illumination system comprising a ceramic luminescence converter

A luminescence converter and lighting system technology, which is applied in the field of lighting systems and can solve problems such as unsatisfactory lighting applications

Inactive Publication Date: 2008-10-15
KONINK PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, it has been commented in the prior art that sulfide-based phosphors such as alkaline earth sulfides are less than ideal for lighting applications, especially for LED applications, since they interact with the encapsulating resin system and are particularly subject to hydrolytic attack ( hydrolytic attack), see US6682663B2

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  • Illumination system comprising a ceramic luminescence converter
  • Illumination system comprising a ceramic luminescence converter
  • Illumination system comprising a ceramic luminescence converter

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Embodiment Construction

[0055] Monolithic Ceramic Luminescence Converter

[0056] The present invention focuses on a monolithic ceramic luminescence converter (CLC) comprising at least one phosphor capable of absorbing a portion of the light emitted by the radiation source and emitting light of a different wavelength than the absorbed light. light, wherein said at least one phosphor is of the general formula AE 1-z S 1-y Se y :A z An alkaline earth metal sulfide excited by an activator A selected from Eu(II), Ce(III), Mn(II) and Pr(III), wherein AE is at least one of Mg, Ca, Sr and Ba An alkaline earth metal, 0≤y<1 and 0.0005≤z≤0.2. Such monolithic ceramic lighting converters may be used in any configuration of lighting systems that include primary radiation sources including, but not limited to, discharge lamps, fluorescent lamps, LEDs, LDs, OLEDs, and X-ray tubes. As used herein, the term "radiation" includes radiation in the UV, IR and visible regions of the electromagnetic spectrum.

[00...

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Abstract

An illumination system, comprises a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an alkaline earth metal sulfide of general formula AE1-zS1-ySey:Az , wherein AE is as least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 = y <1 and 0.0005 = z = 0.2, activated by an activator A selected from the group of Eu(II), Ce(III), Mn(II) and Pr(III). is highly efficient, especially if a blue light emitting diode is used as a radiation source, and provides excellent thermal and spectroscopic properties. The invention is also concerned with a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an alkaline earth metal sulfide of general formula AE1-zS1-ySey:Az, wherein AE is as least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 <= y <1 and 0.0005 <= z <= 0.2, activated by an activator A selected from the group of Eu(II), Ce(III), Mn(II) and Pr(III).

Description

technical field [0001] The invention generally relates to a lighting system comprising a radiation source and a ceramic luminescence converter. The invention also relates to a ceramic luminescence converter for use in such a lighting system. [0002] More specifically, the present invention relates to an illumination system and a ceramic luminescence converter for producing specific colored light by down-conversion luminescence (luminescentdown conversion) and additive color mixing based on a radiation source emitting ultraviolet or blue radiation, including white light. In particular light emitting diodes are contemplated as radiation sources. Background technique [0003] Today, luminescent lighting systems comprising diodes emitting visible colored light as radiation sources are used singly or in clusters for white or colored lighting requiring rugged, small, light weight, high efficiency, long life, low voltage in various applications. [0004] Such applications incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/14H01L33/00C09K11/77H05B33/18H01L33/50
CPCC04B35/547C09K11/0883C04B2235/3213H01L2224/48247H01L33/502H05B33/14C04B2235/3208H01L2924/0002C09K11/7718C04B2235/3224H01L2224/73265C09K11/7731C09K11/7734H01L2224/73253H01L2924/16195C09K11/77347C09K11/77342C09K11/77348
Inventor P·施米特
Owner KONINK PHILIPS ELECTRONICS NV
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