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    Occupant tracking
    1.
    发明授权
    Occupant tracking 有权

    公开(公告)号：US10165650B1

    公开(公告)日：2018-12-25

    申请号：US15681941

    申请日：2017-08-21

    Applicant: Cree, Inc.

    Inventor： Paul Fini ,  Ronald W. Bessems

    IPC: H05B37/02

    Abstract: A lighting fixture has a communication interface; a light source configured to provide light output for general illumination; an image sensor configured to capture image information associated of with a field of view; and control circuitry, which is configured to provide a drive signal to the light source to control the light output. In one embodiment, the control circuitry is further configured to, for each object in the field of view, determine if an object in the field of view is an occupant based on the image information; if the object is an occupant, track movement of the occupant within the field of view; and determine a number of occupants in the field of view. The control circuitry may also be configured to provide occupancy information bearing on the number of occupants in the field of view to a remote entity via the communication interface.

    STABILIZED QUANTUM DOT STRUCTURE AND METHOD OF MAKING A STABILIZED QUANTUM DOT STRUCTURE
    6.
    发明申请
    STABILIZED QUANTUM DOT STRUCTURE AND METHOD OF MAKING A STABILIZED QUANTUM DOT STRUCTURE 有权
    稳定量子点结构和制造稳定量子点结构的方法

    公开(公告)号：US20170005241A1

    公开(公告)日：2017-01-05

    申请号：US15196906

    申请日：2016-06-29

    Applicant: Cree, Inc.

    Inventor： Kenneth Lotito ,  Ryan Gresback ,  Paul Fini ,  James Ibbetson ,  Bernd Keller

    IPC: H01L33/50 ,  H01L33/48 ,  H01L33/60 ,  H01L33/52

    CPC classification number: H01L33/505 ,  B82B1/00 ,  B82B3/00 ,  C09K11/02 ,  C09K11/565 ,  C09K11/883 ,  H01L33/483 ,  H01L33/502 ,  H01L33/52 ,  H01L33/60 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2924/181 ,  H01L2933/0041 ,  H01L2924/00012 ,  H01L2924/00014

    Abstract: A stabilized quantum dot structure for use in a light emitting diode (LED) comprises, according to one embodiment, a luminescent particle comprising one or more semiconductors, a buffer layer overlying the luminescent particle, where the buffer layer comprises an amorphous material, and a barrier layer overlying the buffer layer, where the barrier layer comprises oxygen, nitrogen and/or carbon. According to another embodiment, the stabilized quantum dot structure includes a luminescent particle comprising one or more semiconductors, and a treated buffer layer comprising amorphous silica overlying the luminescent particle, where the stabilized quantum dot structure exhibits a quantum yield of at least about 0.7 when exposed to a blue light flux of about 30 W/cm2 at a temperature of 80-85° C. and relative humidity of 5% for 500 hours.

    Abstract translation: 根据一个实施例，用于发光二极管（LED）的稳定的量子点结构包括：包含一个或多个半导体的发光颗粒，覆盖发光颗粒的缓冲层，其中缓冲层包括无定形材料，以及 阻挡层覆盖缓冲层，其中阻挡层包括氧，氮和/或碳。 根据另一个实施方案，稳定的量子点结构包括包含一个或多个半导体的发光粒子，以及包含覆盖发光粒子的无定形二氧化硅的经处理的缓冲层，其中稳定的量子点结构在暴露时显示出至少约0.7的量子产率 在80-85℃的温度和5％的相对湿度下达到约30W / cm 2的蓝光通量500小时。

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