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    • 21. 发明申请
    • Vehicle lighting apparatus
    • 车辆照明装置
    • US20070132407A1
    • 2007-06-14
    • US11636915
    • 2006-12-11
    • Takanori NambaMasayasu Ito
    • Takanori NambaMasayasu Ito
    • H05B39/00
    • H05B37/036H05B33/0815H05B33/089Y02B20/346
    • A vehicle lighting apparatus includes a plurality of semiconductor light sources that are connected with each other in series, a switching regulator for supplying an electric power from a power source to each of said plurality of semiconductor light sources, forward voltage detection circuitry for detecting a forward voltage of each of said plurality of semiconductor light sources, and failure detection circuitry for detecting the failure of each of said semiconductor light sources based on the detected value of said forward voltage detection means. A semiconductor light source having a lower forward voltage is connected closer to a reference potential side of said power source among said plurality of semiconductor light sources.
    • 一种车辆用照明装置,其具有串联连接的多个半导体光源,用于从所述多个半导体光源中的每一个供给来自电源的电力的开关调节器,用于检测前端的正向电压检测电路 所述多个半导体光源中的每一个的电压以及用于根据所述正向电压检测装置的检测值检测每个所述半导体光源的故障的故障检测电路。 具有较低正向电压的半导体光源在所述多个半导体光源中更靠近所述电源的基准电位侧。
    • 24. 发明授权
    • Light emitting device drive circuit and vehicle lamp using the same
    • 发光装置驱动电路和使用其的车灯
    • US07868563B2
    • 2011-01-11
    • US11962726
    • 2007-12-21
    • Masayasu ItoYoshihiro UchiyamaTakanori Namba
    • Masayasu ItoYoshihiro UchiyamaTakanori Namba
    • G05F1/00
    • H05B33/08
    • A light emitting device drive circuit includes: a power conversion unit for receiving an input electric power and performing an electric power conversion on the input electric power in accordance with a control signal so as to generate the predetermined output current; a current detection unit for detecting an output current IL of the power conversion unit; a temperature detection unit for detecting a case internal temperature TD, which is an interior temperature of a case for accommodating the light emitting device drive circuit; a regulation unit being operable to a) detect whether a temperature TL of the light emitting device has reached a first predetermined temperature TLmax based on TD, IL, and a temperature rise coefficient α relative to IL, the temperature rise coefficient α being set in advance so that TL satisfies a relationship of TL=TD+α·IL, and b) generate a regulation signal for reducing a predetermined output current IL0 so that TL does not exceed TLmax in the event that a result of the detection indicates that TL has reached TLmax; and a control unit for controlling IL0 in accordance with the regulation signal from the regulation unit.
    • 发光器件驱动电路包括:电力转换单元,用于接收输入电力,并根据控制信号对输入电力进行电力转换,以产生预定的输出电流; 电流检测单元,用于检测电力转换单元的输出电流IL; 温度检测单元,用于检测作为用于容纳发光装置驱动电路的壳体的内部温度的壳体内部温度TD; 调节单元,其可操作以:a)检测所述发光装置的温度TL是否已经基于TD,IL达到第一预定温度TLmax,以及相对于IL的升温系数α,预先设定所述升温系数α 使得TL满足TL = TD +α·IL的关系,并且b)产生用于减小预定输出电流IL0的调节信号,使得在检测结果指示TL达到的情况下,TL不超过TLmax TLmax; 以及控制单元,用于根据来自调节单元的调节信号来控制IL0。
    • 25. 发明申请
    • Lighting control circuit for vehicle lighting device
    • 车灯照明装置照明控制电路
    • US20060125320A1
    • 2006-06-15
    • US11282246
    • 2005-11-18
    • Takanori NambaMasayasu Ito
    • Takanori NambaMasayasu Ito
    • H02G3/00
    • H05B33/0815H05B33/0818Y02B20/346
    • An ON/OFF-operation of a main switch SW and auxiliary switches SW1 to SW5 is controlled by a microcomputer 28. Electromagnetic energy in a transformer T is accumulated in an ON operation of the main switch SW and discharged in the transformer T sequentially to output blocks 14 to 22 on the secondary side in an OFF operation of the main switch SW. The electromagnetic energy is discharged twice separately to the output blocks 14, 18 connected to semiconductor light sources A, C having a heavy load, respectively, in one control period T, whereas the electromagnetic energy is discharged only once to the output blocks 16, 20, 22 connected to remaining semiconductor light sources B, D, E, respectively. Therefore, the peak value of the primary current I1 flowing through the primary winding L of the transformer T can be reduced.
    • 主开关SW和辅助开关SW 1〜SW 5的ON / OFF操作由微计算机28控制。 变压器T中的电磁能量累积在主开关SW的接通操作中并且在主开关SW的断开操作中顺序地放电到变压器T中以在次级侧输出块14至22。 在一个控制周期T中,电磁能量分别被分别连接到连接到具有重负载的半导体光源A,C的输出块14,18,而电磁能量仅向输出块16,20放电一次 ,22分别连接到剩余的半导体光源B,D,E。 因此,可以减小流过变压器T的初级绕组L的初级电流I 1的峰值。
    • 26. 发明申请
    • Lighting control circuit for vehicle lighting equipment
    • 汽车照明设备照明控制电路
    • US20060119181A1
    • 2006-06-08
    • US11296050
    • 2005-12-06
    • Takanori NambaMasayasu Ito
    • Takanori NambaMasayasu Ito
    • B60L1/14
    • H05B33/0887H05B33/0815Y02B20/341
    • This disclosure relates to protecting a switching regulator by sensing immediately a change in an input voltage when the input voltage of the switching regulator is changed suddenly. When an input voltage of a switching regulator 12 is changed suddenly and an interrupt request signal IRQ is provided from an input voltage sensing circuit 16 while electromagnetic energy accumulated in the switching regulator 12 is discharged to an output block 14 by turning ON/OFF a switch SW1 in accordance with a switching signal generated by a microcomputer 18, to control a lighting of an LED1, the microcomputer 18 reduces an ON duty of the switching signal provided to the switch SW1 in response to the interrupt request signal IRQ and limits an increase of a peak value of a current flowing through a primary side of the switching regulator 12.
    • 本公开涉及当开关调节器的输入电压突然改变时,立即感测到输入电压的变化来保护开关调节器。 当开关调节器12的输入电压突然改变并且从输入电压检测电路16提供中断请求信号IRQ时,同时开关调节器12中累积的电磁能量通过接通/断开来将开关放电到输出块14 根据微型计算机18产生的切换信号,为了控制LED1的点亮,微型计算机18响应于中断请求信号IRQ而减小提供给开关SW1的切换信号的导通占空比,并且限制增加 流过开关调节器12的初级侧的电流的峰值。
    • 27. 发明申请
    • Discharge lamp lighting circuit
    • 放电灯点亮电路
    • US20050062435A1
    • 2005-03-24
    • US10879579
    • 2004-06-30
    • Takanori NambaMasayasu Ito
    • Takanori NambaMasayasu Ito
    • H05B41/24H05B41/282H05B41/288H05B41/38H05B37/02
    • H05B41/388H05B41/2882H05B41/386
    • A discharge lamp lighting circuit includes an emission acceleration controller for detecting a lamp voltage for the discharge lamp, and supplying power greater than a rated value when the discharge lamp is initially lighted, and for gradually reducing the power supplied thereafter so as to shift the discharge lamp to a steady state. Power control is provided so that the power supplied to the discharge lamp is reduced in accordance with a rise in the voltage of a capacitor, and a charge current is supplied to the capacitor by current sources that provide a current that depends on the time elapsed since the lighting of the discharge lamp started and a second current that depends on a lamp voltage.
    • 放电灯点亮电路包括用于检测放电灯的灯电压并且在放电灯最初点亮时提供大于额定值的功率的发射加速度控制器,并且用于逐渐减小其后提供的功率,以便使放电灯 灯稳定。 提供功率控制,使得根据电容器的电压的上升,提供给放电灯的功率减小,并且通过提供电流的电流源向电容器提供充电电流,电流源取决于从过去经过的时间 放电灯的点亮开始,取决于灯电压的第二电流。