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25 条记录 (耗时 0.014 秒)

    WEISSE LUMINESZENZDIODE
    2.
    发明授权
    WEISSE LUMINESZENZDIODE 失效
    WHITE发光二极管

    公开(公告)号：EP0907970B1

    公开(公告)日：2007-11-07

    申请号：EP98903213.1

    申请日：1998-02-23

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

    发明人： JÜSTEL, Thomas ,  NIKOL, Hans ,  RONDA, Cees

    IPC分类号： H01L33/00

    CPC分类号： H01L33/504

    摘要： The invention relates to a light-emitting device comprising a UV diode with a primary emission of 300 nm ≤ μ ≤ 370 nm,and a phosphor layer consisting of a combination of a blue-light emitting phosphor with an emission band of 430 nm ≤ μ ≤ 490 nm, a green-light emitting phosphor with an emission band of 520 nm ≤ μ ≤ 570 nm and a red-light emitting phosphor with an emission band of 590 nm ≤ μ ≤ 630 nm, said device emitting high-quality white light. The colour rendering index CRI is 90 at a colour temperature of 4 000 K. As colour rendering depends only on the composition of the three phosphors and not on the relation of converted to non-converted light it is easyto control and regulate.

    PHOTONIC BAND GAP MATERIALS WITH PHOSPHORS INCORPORATED
    3.
    发明公开
    PHOTONIC BAND GAP MATERIALS WITH PHOSPHORS INCORPORATED 审中-公开
    存储轻质材料光子带隙材料

    公开(公告)号：EP1797159A1

    公开(公告)日：2007-06-20

    申请号：EP05758708.1

    申请日：2005-07-14

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

    发明人： RONDA, Cornelis, Reinder ,  MÖNCH, Holger ,  NIKOL, Hans

    IPC分类号： C09K11/08 ,  C09K11/06

    CPC分类号： G02B6/1225 ,  B82Y20/00 ,  H01L33/502

    摘要： The present invention relates to the use of photonic band gap materials with phosphors incorporated. Photonic band gap materials play an important role for LEDs as light sources in applications where either a high radiance is desirable or LEDs are used in optical systems. The optical properties of current LEDs are such that the radiance is rather low and cannot be increased by standard means. It is an object of the invention to improve the radiance of light emitting devices by making use of photonic band gap materials with phosphors incorporated. According to the invention there is provided as structured material comprising a pho tonic structure that adjusts a range of photon frequencies, also referred to as photon density of states, in specific directions only, further comprising phosphor material having at least one emission mode for which the photon frequency is in the range adjusted byy the photonic structure wherein the structured material has a symmetry lower than cubic such that the photonic structure adjusts the generation of photons emitted via said it least one emission mode of the phosphor material in less than three directions in this way increasing the radiance.