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    Method and apparatus for determining a target light intensity from a phase-control signal
    3.
    发明授权
    Method and apparatus for determining a target light intensity from a phase-control signal 有权

    公开(公告)号：US10805994B2

    公开(公告)日：2020-10-13

    申请号：US16119670

    申请日：2018-08-31

    申请人： Lutron Technology Company LLC

    发明人： Donald F. Hausman, Jr.

    IPC分类号： H05B41/392 ,  H05B41/295 ,  H05B41/282 ,  H05B45/10 ,  H05B45/37 ,  H05B47/10 ,  H02M1/08

    摘要： A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-DC converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a DC voltage representative of the duty cycle of the phase-control voltage. Changes in the duty cycle of the phase-control voltage that are below a threshold amount are filtered out by the converter circuit, while intentional changes in the duty cycle of the phase-control voltage are reflected in changes in the target intensity level and thereby the intensity level of the lamp tube.

    Discharge lamp drive device, light source device, projector, and discharge lamp drive method
    4.
    发明授权
    Discharge lamp drive device, light source device, projector, and discharge lamp drive method 有权

    公开(公告)号：US10375808B2

    公开(公告)日：2019-08-06

    申请号：US16135274

    申请日：2018-09-19

    申请人： SEIKO EPSON CORPORATION

    发明人： Junichi Suzuki ,  Masaru Kono

    IPC分类号： H05B41/28 ,  H05B41/38 ,  H05B41/282 ,  H04N9/31 ,  G03B21/20 ,  H05B41/288

    摘要： A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. Each of the drive patterns has a plurality of drive parameters. The plurality of drive patterns includes a first drive pattern and a second drive pattern different from each other in a value of at least one of the plurality of drive parameters. The control section is configured to execute the first drive pattern and the second drive pattern in accordance with at least one of accumulated lighting time of the discharge lamp and an individual of the discharge lamp in a case in which an inter-electrode voltage of the discharge lamp is at a predetermined voltage value.

    Projector and control method for projector
    6.
    发明授权
    Projector and control method for projector 有权

    公开(公告)号：US09699423B2

    公开(公告)日：2017-07-04

    申请号：US15052006

    申请日：2016-02-24

    申请人： SEIKO EPSON CORPORATION

    发明人： Junichi Suzuki ,  Toru Terashima

    IPC分类号： H04N9/31 ,  H05B41/36 ,  H05B41/282 ,  H05B37/02 ,  G03B21/20

    CPC分类号： H04N9/3155 ,  G03B21/2026 ,  H04N9/3144 ,  H05B37/02 ,  H05B41/2828 ,  H05B41/36 ,  Y02B20/186

    摘要： In a projector, a reflection mirror configured to reflect light emitted from a discharge lamp is disposed on a first end of a discharge lamp main body, a first electrode is disposed on the first end side, each of a first AC period and a second AC period alternately includes a first polarity period in which the first electrode serves as an anode and a second polarity period in which a second electrode serves as an anode, a controller causes a period to transition from the first AC period to the second AC period in a case where an input reception unit receives a stop operation on the projector, and an absolute value of a driving current of the second polarity period in the second AC period is greater than an absolute value of the driving current of the second polarity period in the first AC period.

    AC-DC power converter
    7.
    发明授权
    AC-DC power converter 有权

    公开(公告)号：US09531281B2

    公开(公告)日：2016-12-27

    申请号：US14824303

    申请日：2015-08-12

    申请人： Silergy Semiconductor Technology (Hangzhou) LTD

    发明人： Jian Deng ,  Chen Zhao

    IPC分类号： H02M3/335 ,  H05B33/08 ,  H02M1/42 ,  H05B41/282

    CPC分类号： H02M3/33523 ,  H02M1/4258 ,  H05B33/0815 ,  H05B33/0845 ,  H05B41/2822 ,  Y02B20/348 ,  Y02B70/126

    摘要： In one embodiment, an AC-DC power converter can include: (i) a rectifier bridge and filter to convert an external AC voltage to a DC input voltage; (ii) a first energy storage element to store energy from the DC input voltage via a first current through a first conductive path when in a first operation mode; (iii) a second energy storage element configured to store energy from a second DC voltage via a second current through a second conductive path when in the first operation mode; (iv) a transistor configured to share the first and second conductive paths; (v) the first energy storage element releasing energy to a third energy storage element and a load through a third conductive path when in a second operation mode; and (vi) the second energy storage element releasing energy to the load through a fourth conductive path during the second operation mode.

    Vehicle lamp and vehicle lamp driving device
    8.
    发明授权
    Vehicle lamp and vehicle lamp driving device 有权
    车灯和车灯驱动装置

    公开(公告)号：US09386646B2

    公开(公告)日：2016-07-05

    申请号：US14657476

    申请日：2015-03-13

    申请人： KOITO MANUFACTURING CO., LTD.

    发明人： Masayasu Ito ,  Takao Muramatsu ,  Syouhei Yanagidu

    IPC分类号： H05B33/08 ,  H05B41/282

    CPC分类号： H05B33/083 ,  H05B33/0815 ,  H05B41/2828 ,  Y02B20/347

    摘要： There is provided a driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp. The driving device includes a current source which is configure to supply a drive current to the light source, and N bypass circuits which are provided in parallel to N light emitting units, respectively. Each of the bypass circuits includes a bypass transistor which is provided in parallel to a corresponding light emitting unit, a feedback capacitor which is provided between a gate and a drain of the bypass transistor, and a gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor according to a control signal.

    摘要翻译： 提供了一种驱动装置，其与包括串联连接的多个发光单元的光源一起构成车灯。 驱动装置包括被配置为向光源提供驱动电流的电流源和分别与N个发光单元并联设置的N个旁路电路。 每个旁路电路包括与对应的发光单元并联设置的旁路晶体管，设置在旁路晶体管的栅极和漏极之间的反馈电容器，以及被配置为提供驱动器的栅极驱动电路 根据控制信号在旁路晶体管的栅极和源极之间施加电压。

    Method of operating switch mode power converters, and controllers and lighting systems using such a method
    9.
    发明授权
    Method of operating switch mode power converters, and controllers and lighting systems using such a method 有权
    使用这种方法操作开关模式电源转换器，控制器和照明系统的方法

    公开(公告)号：US09385613B2

    公开(公告)日：2016-07-05

    申请号：US14168210

    申请日：2014-01-30

    申请人： NXP B.V.

    发明人： Wouter Groeneveld

    IPC分类号： G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H02M3/335 ,  H05B33/08 ,  H05B41/282 ,  G09G3/34 ,  H05B41/392

    CPC分类号： H02M3/33507 ,  G09G3/3406 ,  H05B33/0815 ,  H05B33/0818 ,  H05B33/0848 ,  H05B37/02 ,  H05B41/2828 ,  H05B41/3927 ,  Y02B20/346 ,  Y10S362/80

    摘要： A controller and method for operating a controller are disclosed. In an embodiment, a method involves in a mode-setting phase, polling connection pins to sense the presence and/or magnitude of a respective relatively high impedance connected between a respective connection pin and a predetermined electrical potential, and/or other connection pins to sense the presence and/or magnitude of a respective further impedance connected between the respective connection pin and a predetermined electrical potential. The method also involves selecting an operational mode from a plurality of possible operational modes. In an operational phase, the method involves operating in the selected operational mode, including providing a respective drive signal having a relatively low output impedance from each of the first group of connection pins, and measuring a sense voltage on each of the second group of connection pins.

    摘要翻译： 公开了一种用于操作控制器的控制器和方法。 在一个实施例中，一种方法涉及模式设置阶段，轮询连接引脚以感测连接在相应的连接引脚和预定电位之间的相应相对高阻抗的存在和/或幅度，和/或其它连接引脚 感测连接在相应的连接引脚和预定电位之间的相应另外的阻抗的存在和/或大小。 该方法还涉及从多个可能的操作模式中选择操作模式。 在操作阶段，该方法涉及以所选择的操作模式操作，包括从第一组连接引脚提供具有相对较低输出阻抗的相应驱动信号，以及测量第二组连接中的每一个上的感测电压 针脚。

    Method to control striations in a lamp powered by an electronic ballast
    10.
    发明授权
    Method to control striations in a lamp powered by an electronic ballast 有权
    控制由电子镇流器供电的灯的条纹的方法

    公开(公告)号：US09307623B1

    公开(公告)日：2016-04-05

    申请号：US14335526

    申请日：2014-07-18

    申请人： Universal Lighting Technologies, Inc.

    发明人： Stephen D. Mays, II ,  John J. Dernovsek ,  Brandon Dyer ,  Danny Pugh

    IPC分类号： H05B41/282 ,  H02M7/5375 ,  H02M7/5387

    CPC分类号： H05B41/2828 ,  H02M7/53803 ,  H05B33/0815 ,  Y02B20/348 ,  Y02B70/1441

    摘要： A high efficiency electronic ballast or driver circuit provides striation control at reduced power levels. The driver circuit includes a controller operating a half-bridge inverter to drive a resonant tank circuit. The controller provides asymmetric on-times to upper and lower switches of the half-bridge inverter when operating at low duty cycles (e.g., duty cycles of 50% or less). The resulting asymmetric output current eliminates striation in lamps driven by the ballast. In order to maintain light output (i.e., output current), the controller reduces the operating frequency of the half-bridge inverter to increase the gain and impedance of the resonant tank circuit.

    摘要翻译： 高效率电子镇流器或驱动电路以较低的功率级提供条纹控制。 驱动器电路包括操作半桥逆变器来驱动谐振回路的控制器。 当在低占空比（例如50％或更少的占空比）下工作时，控制器向半桥逆变器的上和下开关提供不对称接通时间。 所产生的非对称输出电流消除了由镇流器驱动的灯的条纹。 为了保持光输出（即输出电流），控制器降低半桥逆变器的工作频率，以增加谐振回路的增益和阻抗。