发明授权
- 专利标题: Method and device for the modulation of the intensity of fluorescent lamps
- 专利标题(中): 用于荧光灯强度调制的方法和装置
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申请号: US09242092申请日: 1999-02-08
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公开(公告)号: US06211624B1公开(公告)日: 2001-04-03
- 发明人: Walter Holzer
- 申请人: Walter Holzer
- 优先权: DE19632282 19960809
- 主分类号: H05B3702
- IPC分类号: H05B3702
摘要:
The invention describes a method for the modulation of the light intensity of fluorescent lamps via the supply main by modification of the form and/or the amplitude of the power supply provided. An electronic control element, provided as a component of the logical circuit, temporarily blocks current flow after at least every second zero-crossing of the voltage, dependent upon time and/or voltage. Blocking of the current flow occurs only during the time period in which there is no flow of charging current for the downstream direct-current mains supply circuit. The advantage thus obtained is that the control pulses for the logical circuit do not influence the electric current flowing through the fluorescent lamps.