Multi-mode LED illumination system

    公开(公告)号:US09866760B2

    公开(公告)日:2018-01-09

    申请号:US15403132

    申请日:2017-01-10

    Applicant: GOOGLE INC.

    Abstract: This application discloses a lighting emitting diode (LED) illumination system that operates at least in a boost mode and a bypass mode. The LED illumination system includes a plurality of LEDs and bypass elements. Each bypass element is coupled in parallel with one or more LEDs, and configured to bypass them selectively in the bypass mode. A boost converter is configured to drive the LEDs. The boost converter includes a boost controller that is configured to enable the boost mode in response to a boost enable signal. In the boost mode, the boost controller is electrically coupled to control the boost converter to drive the LEDs by a boosted drive voltage, and in the bypass mode, the boost controller is deactivated to allow the boost converter to drive a subset of the LEDs by a regular drive voltage that is substantially lower than the boosted drive voltage.

    SMOKE DETECTOR WITH REGULATED CONSTANT-CURRENT CIRCUIT FOR DRIVING OPTICAL SOURCES
    2.
    发明申请
    SMOKE DETECTOR WITH REGULATED CONSTANT-CURRENT CIRCUIT FOR DRIVING OPTICAL SOURCES 有权
    具有用于驱动光源的调节恒流电路的烟雾探测器

    公开(公告)号:US20160345394A1

    公开(公告)日:2016-11-24

    申请号:US14717739

    申请日:2015-05-20

    Applicant: Google Inc.

    Abstract: Systems and methods for driving optical sources operating at different wavelengths within a smoke sensor are described herein. Multiple optical sources such as light emitting diodes may be used in a photoelectric smoke sensor to detect particles of different sizes. Photoelectric smoke sensors can operate by pulsing the LEDs and measuring a response in a light sensor. The signal measured at the light sensor changes based on the quantity of particles existing in a smoke chamber. Each optical source may have different operational characteristics and thus require different drive currents to operate. LED driving circuitry according to embodiments discussed herein provide a consistent and reliable drive current to each optical source, while maximizing efficiency of power consumption across a range of possible voltages provided by different power sources.

    Abstract translation: 这里描述了用于驱动在烟雾传感器内以不同波长工作的光源的系统和方法。 多个光源(例如发光二极管)可用于光电烟雾传感器中以检测不同尺寸的颗粒。 光电烟雾传感器可以通过脉冲发光二极管和测量光传感器中的响应来进行操作。 在光传感器处测量的信号根据烟室中存在的粒子数量而变化。 每个光源可以具有不同的操作特性,因此需要不同的驱动电流来操作。 根据本文讨论的实施例的LED驱动电路为每个光源提供一致和可靠的驱动电流,同时在由不同电源提供的可能电压的范围内最大化功率消耗的效率。

    COMPONENT INTERFACING IN HAZARD SAFETY SYSTEMS
    3.
    发明申请
    COMPONENT INTERFACING IN HAZARD SAFETY SYSTEMS 有权
    组件接口危害安全系统

    公开(公告)号:US20150022346A1

    公开(公告)日:2015-01-22

    申请号:US14334159

    申请日:2014-07-17

    Applicant: Google Inc.

    CPC classification number: G05B11/01 G08B25/04 G08B29/06

    Abstract: Systems and methods for interfacing a hazard detection device with a control panel system via a dongle are provided. The dongle may be configured to alternate between drawing first and second amounts of power from the control panel system in response to the hazard detection device alternating between operating in a normal mode when no hazard is detected and an alarm mode when a hazard is detected. The hazard detection device may operate independently of any characteristics of the control panel system. For example, the hazard detection device may operate without drawing any power from the control panel system. Therefore, the dongle may allow for various types of hazard detection devices to interface with a common two-line power control system.

    Abstract translation: 提供了通过加密狗将危害检测装置与控制面板系统接口的系统和方法。 所述加密狗可以被配置为在不检测到危险的情况下响应于所述危险检测装置在正常模式下操作之间交替地在从所述控制面板系统抽出第一和第二数量的电力之间交替,并且在检测到危险时报警模式。 危害检测装置可以独立于控制面板系统的任何特性而操作。 例如,危害检测装置可以在不从控制面板系统中吸取任何电力的情况下操作。 因此,加密狗可以允许各种类型的危险检测设备与公共的两线电力控制系统相连接。

    Multi-Mode LED Illumination System

    公开(公告)号:US20170126949A1

    公开(公告)日:2017-05-04

    申请号:US15403132

    申请日:2017-01-10

    Applicant: GOOGLE INC.

    Abstract: This application discloses a lighting emitting diode (LED) illumination system that operates at least in a boost mode and a bypass mode. The LED illumination system includes a plurality of LEDs and bypass elements. Each bypass element is coupled in parallel with one or more LEDs, and configured to bypass them selectively in the bypass mode. A boost converter is configured to drive the LEDs. The boost converter includes a boost controller that is configured to enable the boost mode in response to a boost enable signal. In the boost mode, the boost controller is electrically coupled to control the boost converter to drive the LEDs by a boosted drive voltage, and in the bypass mode, the boost controller is deactivated to allow the boost converter to drive a subset of the LEDs by a regular drive voltage that is substantially lower than the boosted drive voltage.

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