发明名称 |
Fluorescent lamp circuit with regulation responsive to voltage, current, and phase of load |
摘要 |
In a fluorescent lamp, a "soft" start-up circuit initially applies a lamp, or inter-electrode, voltage which is limited to a peak voltage that will not start the lamp prior to heating of the lamp cathode to the proper temperature. The lamp cathode is then heated to the proper start-up temperature after which the lamp voltage is increased to a value well in excess of the ignition voltage required for all lamp types and operating characteristics in initiating lamp operation. The increased lamp voltage is applied in a pulsed manner until the lamp is ignited, whereupon the lamp may be operated at normal lamp current and cathode voltages or the lamp filaments may even be turned off with a consequent savings in input power.
|
申请公布号 |
US4791338(A) |
申请公布日期 |
1988.12.13 |
申请号 |
US19860878819 |
申请日期 |
1986.06.26 |
申请人 |
THOMAS INDUSTRIES, INC. |
发明人 |
DEAN, THOMAS E.;HENRICH, WILLIAM H. |
分类号 |
H05B41/295;H05B41/298;H05B41/392;(IPC1-7):H05B41/24;H05B41/233 |
主分类号 |
H05B41/295 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|