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    • 1. 发明授权
    • Color control of a discharge lamp during dimming
    • 在调光期间放电灯的颜色控制
    • US07928669B2
    • 2011-04-19
    • US12028068
    • 2008-02-08
    • Jianwu LiAlan G. Chalmers
    • Jianwu LiAlan G. Chalmers
    • H05B37/02
    • H05B41/3928Y02B20/202
    • A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for driving the lamp at less than the nominal power. The lamp ballast circuit generates a first alternating current waveform during the nominal power mode and generates a background alternating current waveform in the reduced power mode which is perturbed at intervals by a high intensity pulse which helps to reduce the change in correlated color temperature which would otherwise occur in the dimming mode.
    • 镇流器电路适用于以至少两种功率模式驱动高强度放电灯,包括用于以标称功率驱动高强度放电灯的标称功率模式和用于以小于标称功率驱动灯的降低功率调光模式 。 灯镇流器电路在标称功率模式期间产生第一交流电波形,并且以降低功率模式产生背景交流电波形,其以高强度脉冲间隔干扰,这有助于减小相关色温的变化 发生在调光模式。
    • 2. 发明授权
    • High pressure lamp with lamp flicker suppression and lamp voltage control
    • 高压灯,带灯闪烁抑制和灯电压控制
    • US07443103B2
    • 2008-10-28
    • US11166315
    • 2005-06-24
    • Jianwu LiAlan G. ChalmersViktor K. VargaTimothy B. GurinGary R. AllenAnjali KotkundeJames C. McNamara
    • Jianwu LiAlan G. ChalmersViktor K. VargaTimothy B. GurinGary R. AllenAnjali KotkundeJames C. McNamara
    • H05B41/36
    • H05B41/3928Y02B20/202Y10S315/07
    • A method and system to supply current to a high pressure lamp is provided, the method and system comprising an alternating lamp current waveform with a half cycle mean amplitude I1 and a half cycle time duration T, a current pulse waveform including at least one current pulse with a half cycle mean amplitude I2 and at least one current pulse occurring after the trailing edge of a half cycle of the alternating lamp current, the pulse having a half cycle duration of Tp. These waveforms are combined to generate a current waveform including a current pulse waveform, the current pulse waveform starting after a time delay Td from the trailing edge of a half cycle of the alternating lamp current waveform, the time duration Tp of the at least one current pulse lasting less than the remaining time before the leading edge of the second half cycle of the alternating lamp current waveform. The combined current waveform supplies current to a high pressure lamp and produces a cone shaped tip protrusion which reduces lamp flicker.
    • 提供了一种向高压灯提供电流的方法和系统,该方法和系统包括具有半周期平均振幅I 1和半周期持续时间T的交替灯电流波形,包括至少一个电流的电流脉冲波形 脉冲具有半周期平均幅度I 2和在交流灯电流的半周期的后沿之后出现的至少一个电流脉冲,脉冲具有Tp的半周期持续时间。 这些波形被组合以产生包括电流脉冲波形的电流波形,从交流灯电流波形的半周期的后沿开始的时间延迟Td之后的当前脉冲波形,至少一个电流的持续时间Tp 脉冲持续时间小于交流灯电流波形的第二个半周期的前沿之前的剩余时间。 组合电流波形将电流提供给高压灯,并产生锥形尖端突起,减少灯闪烁。
    • 3. 发明申请
    • COLOR CONTROL OF A DISCHARGE LAMP DURING DIMMING
    • 排料灯在调色时的颜色控制
    • US20090200954A1
    • 2009-08-13
    • US12028068
    • 2008-02-08
    • Jianwu LiAlan G. Chalmers
    • Jianwu LiAlan G. Chalmers
    • H05B41/39
    • H05B41/3928Y02B20/202
    • A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for driving the lamp at less than the nominal power. The lamp ballast circuit generates a first alternating current waveform during the nominal power mode and generates a background alternating current waveform in the reduced power mode which is perturbed at intervals by a high intensity pulse which helps to reduce the change in correlated color temperature which would otherwise occur in the dimming mode.
    • 镇流器电路适用于以至少两种功率模式驱动高强度放电灯,包括用于以标称功率驱动高强度放电灯的标称功率模式和用于以小于标称功率驱动灯的降低功率调光模式 。 灯镇流器电路在标称功率模式期间产生第一交流电波形,并且以降低功率模式产生背景交流电波形,其以高强度脉冲间隔干扰,这有助于减小相关色温的变化 发生在调光模式。