LED lighting system for use in environments with high magnetics fields or that require low EMI emissions
    1.
    发明授权
    LED lighting system for use in environments with high magnetics fields or that require low EMI emissions 失效
    LED照明系统,用于具有高磁场或需要低EMI辐射的环境

    公开(公告)号:US07629570B2

    公开(公告)日:2009-12-08

    申请号:US11604118

    申请日:2006-11-24

    Abstract: This invention is a non-ferrous lighting fixture and non-ferrous lighting system that can be used in areas with high magnetic fields or that require low EMI emissions, such as MRI operating rooms. This invention uses LED's to provide a high-intensity, quality white or other color light that is softened by reflectors and diffusers, and can be dimmed to provide flexible lighting levels. The flexible lighting levels can range from the maximum light used for patient procedures and equipment servicing/maintenance to the lowest light level used to keep a patient comfortable while facing upward on the MRI scanning table. Moreover, by using an aluminum substrate printed circuit board, this invention resolves the thermal issues associated with high-intensity lighting. Not only does this invention resolve glare and hot spot issues, it protects the user and installer from electrical hazards associated with potentially high voltages, as well. Finally, because this invention is completely non-ferrous, it does not interfere with the integrity of the MRI equipment's readings.

    Abstract translation: 本发明是一种有色金属照明灯具和有色金属照明系统,可用于具有高磁场或需要低EMI辐射的区域,如MRI手术室。 本发明使用LED来提供由反射器和扩散器软化的高强度,高质量的白色或其它颜色的光,并且可以被调暗以提供柔性的照明水平。 灵活的照明水平可以从用于患者手术和设备维修/维护的最大光线到用于在MRI扫描台面朝上时使患者舒适的最低光线水平。 此外,通过使用铝基板印刷电路板,本发明解决了与高强度照明相关的热问题。 本发明不仅可以解决眩光和热点问题,还可以保护用户和安装人员免受与潜在高电压相关的电气危害。 最后,由于本发明是完全有色的,它不会影响MRI设备读数的完整性。

    Power supply for gas discharge lamp
    2.
    发明授权
    Power supply for gas discharge lamp 失效
    气体放电灯电源

    公开(公告)号:US06445141B1

    公开(公告)日:2002-09-03

    申请号:US09719322

    申请日:2001-02-05

    CPC classification number: H05B41/3925 H05B37/03 H05B41/2828 H05B41/2856

    Abstract: A power supply for a gas discharge lamp is claimed. An input circuit receives power from a power source. An output transformer having a primary winding and a secondary winding and has a lamp connected in circuit across the secondary winding. First and second power switches switch power to the primary winding. The driver drives the power switches at a drive frequency. A tuned LC resonant circuit having a resonant frequency is connected in circuit between the driver and the lamp. A controller generates control signals to the driver at a first frequency that is functionally related to the drive frequency, and regulates the lamp current by controlling the difference between the resonant frequency and the first frequency.

    Abstract translation: 要求用于气体放电灯的电源。 输入电路从电源接收电力。 一种输出变压器,其具有初级绕组和次级绕组,并且具有连接在次级绕组上的电路中的灯。 第一和第二电源开关将电源切换到初级绕组。 驱动器以驱动频率驱动电源开关。 具有谐振频率的调谐LC谐振电路在驱动器和灯之间的电路中连接。 控制器以与驱动频率功能相关的第一频率向驱动器产生控制信号,并且通过控制谐振频率和第一频率之间的差来调节灯电流。

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