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    A LASER PROJECTION SYSTEM BASED ON A LUMINESCENT SCREEN
    4.
    发明授权
    A LASER PROJECTION SYSTEM BASED ON A LUMINESCENT SCREEN 有权
    光基于屏幕的激光投影系统

    公开(公告)号：EP1934652B1

    公开(公告)日：2012-02-22

    申请号：EP06809406.9

    申请日：2006-09-26

    申请人： Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

    发明人： WEICHMANN, Ulrich ,  SCHMIDT, Peter ,  HEUSLER, Gero

    IPC分类号： G03B21/60 ,  G02F1/13

    CPC分类号： G03B21/60 ,  G02F2203/12 ,  H04N5/7416 ,  H04N9/3129

    摘要： The present invention relates to a laser projection system consisting of at least one first laser light source (1), a projection screen (7) and a spatial light modulator (6) for projecting a laser beam of said laser light source (1) to form an image on said projection screen (7). The projection screen (7) comprises a luminescent layer (9) which upon excitation by said laser beam emits blue light. To this end, the luminescent layer (9) contains MSi6-aAlaN8-aOx+a:Eu2+ (with M = Sr, Ba, Ca; 0 ≤ x ≤ 1; 0 ≤ a ≤ 1) as a luminescent material. With this material laser light of a laser diode emitting in the wavelength region of 405 nm can be converted to blue light of 450 nm with high efficiency. The proposed projection system, therefore, is suitable for RGB projection using laser diodes as laser light sources.

    A LASER PROJECTION SYSTEM BASED ON A LUMINESCENT SCREEN
    7.
    发明公开
    A LASER PROJECTION SYSTEM BASED ON A LUMINESCENT SCREEN 有权
    光基于屏幕的激光投影系统

    公开(公告)号：EP1934652A1

    公开(公告)日：2008-06-25

    申请号：EP06809406.9

    申请日：2006-09-26

    申请人： Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

    发明人： WEICHMANN, Ulrich ,  SCHMIDT, Peter ,  HEUSLER, Gero

    IPC分类号： G03B21/60 ,  G02F1/13

    CPC分类号： G03B21/60 ,  G02F2203/12 ,  H04N5/7416 ,  H04N9/3129

    摘要： The present invention relates to a laser projection system consisting of at least one first laser light source (1), a projection screen (7) and a spatial light modulator (6) for projecting a laser beam of said laser light source (1) to form an image on said projection screen (7). The projection screen (7) comprises a luminescent layer (9) which upon excitation by said laser beam emits blue light. To this end, the luminescent layer (9) contains MSi6-aAlaN8-aOx+a:Eu2+ (with M = Sr, Ba, Ca; 0 ≤ x ≤ 1; 0 ≤ a ≤ 1) as a luminescent material. With this material laser light of a laser diode emitting in the wavelength region of 405 nm can be converted to blue light of 450 nm with high efficiency. The proposed projection system, therefore, is suitable for RGB projection using laser diodes as laser light sources.

    ILLUMINATION SYSTEM COMPRISING A RADIATION SOURCE AND A LUMINESCENT MATERIAL
    10.
    发明公开
    ILLUMINATION SYSTEM COMPRISING A RADIATION SOURCE AND A LUMINESCENT MATERIAL 审中-公开
    与辐射源和光管照明系统

    公开(公告)号：EP2013315A2

    公开(公告)日：2009-01-14

    申请号：EP07735514.7

    申请日：2007-04-17

    申请人： Philips Intellectual Property & Standards GmbH ,  Koninklijke Philips Electronics N.V.

    发明人： SCHMIDT, Peter ,  MAYR, Walter

    IPC分类号： C09K11/77

    CPC分类号： C09K11/7734 ,  C09K11/0883 ,  C09K11/7731 ,  C09K11/7738 ,  C09K11/7739 ,  C09K11/7774 ,  H01L33/504 ,  H01L2224/48091 ,  H01L2224/8592 ,  H01L2924/00014

    摘要： An illumination system, comprising a radiation source and a luminescent material comprising at least one phosphor capable of absorbing a part of the light emitted by the radiation source and emitting light having a wavelength different from that of the absorbed light; wherein said at least one phosphor is a yellow to red-emitting europium(II)-activated ortho-phosphosilicate of general formula EA2-x-yAxPxSi1-xO4:Euy, wherein EA is at least one bivalent metal selected from the group comprising calcium, magnesium, strontium, barium, zinc and manganese, A is at least one monovalent metal chosen from the group of lithium, sodium, potassium, rubidium, cesium, copper and silver, and wherein 0.01 ≤ x ≤ 1 and 0.0025 ≤ y ≤ O.1 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The red to yellow emitting europium(II)-activated ortho-phosphosilicate of general formula EA2-x-yAxPxSi1-xO4:Euy, wherein EA is at least one bivalent metal selected from the group comprising calcium, magnesium, strontium, barium, zinc and manganese, A is at least one monovalent metal chosen from the group of lithium, sodium, potassium, rubidium, cesium, copper and silver, and wherein 0.01 ≤ x ≤ 1 and 0.0025 ≤ y ≤ 0.1 is efficiently excitable by primary radiation in the near UV-to-blue range of the electromagnetic spectrum.