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11. 发明专利

CA2622855A1 PROGRAM START BALLAST 未知
公开(公告)号：CA2622855A1
公开(公告)日：2008-11-11
申请号：CA2622855
申请日：2008-02-26
申请人： OSRAM SYLVANIA INC
发明人： WANG KAIYU , YU QINGHONG
IPC分类号： H05B41/02 , H05B41/04 , H05B41/288 , H05B41/36
摘要： A ballast (10) for powering at least one gas discharge lamp (70) in a progra m start mode comprises an inverter (200), a resonant output circuit (400), and a control circuit (600). During operation of ballast (10), control circuit (600) monitors a voltage within resonant output circuit (400). When the monitored voltage reaches a first specified level that is indicative of sufficient filament preheating, control circuit (600) maintains the inverter operating frequency at a first present value for a preheating period so as to provide preheating of lamp filaments (72,74). Following completion of the preheating period, control circuit (600) allows the inverter operating frequency to decrease. When the monitored voltage reaches a second specified level that is indicative of sufficient ignition voltage, control circuit (600) maintains the inverter operating frequency at a second present value for an ignition period so as t o provide ignition of lamp (70).

12. 发明专利

CA2620605A1 BALLAST WITH IGNITION VOLTAGE CONTROL 未知
公开(公告)号：CA2620605A1
公开(公告)日：2008-11-11
申请号：CA2620605
申请日：2008-02-08
申请人： OSRAM SYLVANIA INC
发明人： PARISELLA JOSEPH L , YU QINGHONG
IPC分类号： H05B41/02 , H05B37/03 , H05B41/04 , H05B41/288 , H05B41/36
摘要： A ballast (10) for powering a lamp load (70) comprising one or more gas discharge lamps (72,74) includes an inverter (200), a resonant output circuit (400), a nd a control circuit (600). During operation of ballast (10), control circuit (600) monitors at least one voltage within one or more series resonant circuits of output circuit (400). When the monitored voltage reaches a specified level, control circuit (600) directs inverter (200) to maintain its operating frequency at a present value for a predetermined period of time, so as to allow output circuit (400) to provide a suitably high voltage for igniting the lamp(s). If the lamp(s) ignite within the predetermined period of time, control circuit (600) ceases controlling inverter (200) to maintain its operating frequency at the present value, so as to allow for normal operation of the lamp(s). Control circuit (600) also provides a lamp stabilization function, in which the inverter operating frequency is prevented from falling below a specified minimum value, and a protective function, in which inverter (200) is deactivated in response to failure of the lamp(s) to ignite within the predetermined period of time.

13. 发明公开

EP2062465A4 BALLAST WITH ARC PROTECTION CIRCUIT 有权
标题翻译：弓保护电路镇流器
公开(公告)号：EP2062465A4
公开(公告)日：2010-12-01
申请号：EP07837486
申请日：2007-08-29
申请人： OSRAM SYLVANIA INC
发明人： KONOPKA JOHN G , PARISELLA JOSEPH L , TRESTMAN GRIGORIY A , YU QINGHONG
IPC分类号： H05B41/285
CPC分类号： H05B41/2851 , Y02B20/185 , Y02B20/186

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