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    LUMINAIRE HAVING A LIGHT GUIDE WITH CLADDING
    1.
    发明公开
    LUMINAIRE HAVING A LIGHT GUIDE WITH CLADDING 审中-公开

    公开(公告)号：US20230408748A1

    公开(公告)日：2023-12-21

    申请号：US18098669

    申请日：2023-01-18

    申请人： Quarkstar LLC

    发明人： Eric Bretschneider ,  Ferdinand Schinagl

    IPC分类号： F21V8/00

    CPC分类号： G02B6/0055 ,  G02B6/0028 ,  G02B6/0031

    摘要： A luminaire module includes light-emitting elements (LEEs) arranged to provide light; a light guide including a receiving end and an opposing end, the receiving end arranged to receive light provided by the LEEs, a core including a first transparent material with a first refractive index, the core having a pair of opposing side surfaces extending along a length of the light guide between the receiving and opposing ends, and a cladding including a second material having a second smaller refractive index, the cladding extending across and being in contact with at least a portion of the opposing side surfaces forming a cladding-core interface. The cladding-core interface is optically smooth. Additionally, the luminaire module includes an optical extractor arranged to receive guided light from the opposing end of the light guide and configured to output into the ambient environment at least some of the received guided light.

    Light-emitting devices providing asymmetrical propagation of light
    6.
    发明授权
    Light-emitting devices providing asymmetrical propagation of light 有权

    公开(公告)号：US11353167B2

    公开(公告)日：2022-06-07

    申请号：US17321112

    申请日：2021-05-14

    申请人： Quarkstar LLC

    发明人： Roland H. Haitz ,  George E. Smith ,  Robert C. Gardner ,  Louis Lerman

    IPC分类号： G02B19/00 ,  F21K9/60 ,  G02B5/02 ,  F21V13/08 ,  F21V13/02 ,  H01L33/58

    摘要： A variety of light-emitting devices for general illumination utilizing solid state light sources (e.g., light emitting diodes) are disclosed. In general, the devices include a scattering element in combination with an extractor element. The scattering element, which may include elastic and/or inelastic scattering centers, is spaced apart from the light source element. Opposite sides of the scattering element have asymmetric optical interfaces, there being a larger refractive index mismatch at the interface facing the light emitting element than the interface between the scattering element and the extractor element. Such a structure favors forward scattering of light from the scattering element. In other words, the system favors scattering out of the scattering element into the extractor element over backscattering light towards the light source element. The extractor element, in turn, is sized and shaped to reduce reflection of light exiting the light-emitting device at the devices interface with the ambient environment.

    Lifetime color stabilization of color-shifting artificial light sources
    7.
    发明授权
    Lifetime color stabilization of color-shifting artificial light sources 有权

    公开(公告)号：US11337282B2

    公开(公告)日：2022-05-17

    申请号：US16488463

    申请日：2018-02-28

    申请人： QUARKSTAR LLC

    发明人： Eric Bretschneider ,  Louis Lerman ,  Hans Peter Stormberg

    IPC分类号： H05B45/22 ,  H05B45/24 ,  H01L33/50 ,  H05B45/28

    摘要： A system includes two or more phosphor-containing white LEDs (or other color-shifting artificial light sources) selected so that their combined color shift over at least 8,000 hours (e.g., at least 10,000 hours, at least 20,000 hours, at least 30,000 hours, at least 40,000 hours, up to 200,000 hours, up to 100,000 hours, up to 80,000 hours) of operation is less than at least one of the LED's (or the other color-shifting artificial light source's) color shift over that time. Here, the combined color shift (Δ′v′) over the at least 8,000 hours (e.g., at least 10,000 hours, at least 20,000 hours, at least 30,000 hours, at least 40,000 hours, up to 200,000 hours, up to 100,000 hours, up to 80,000 hours) of operation can be less than 0.007 (e.g., 0.006 or less, 0.005 or less, 0.004 or less, 0.003 or less, 0.002 or less, 0.001 or less, 0.0005 or less).