公开(公告)号：US5680015A

公开(公告)日：1997-10-21

申请号：US539882

申请日：1995-10-06

申请人： Franz Bernitz ,  Andreas Huber ,  Hendrik Kornatz ,  Peter Niedermeier

发明人： Franz Bernitz ,  Andreas Huber ,  Hendrik Kornatz ,  Peter Niedermeier

IPC分类号： H05B41/282 ,  H05B41/02 ,  H05B41/292 ,  H05B37/02

CPC分类号： H05B41/2928 ,  Y02B20/208

摘要： To operate a discharge lamp, and more particularly a low-power high-pressure discharge lamp, only in quiet or stable lamp operation, a microprocessor (MC) is provided which establishes a test phase of limited time duration during which the frequency of operation of the lamp is varied by frequency modulation within a predetermined range. Lamp operation is monitored, for example by deriving a test voltage across a coupling capacitor (C6) receiving lamp current. If the monitored voltage, which is representative of lamp operation, shows that the lamp operates quietly and stably, the then pertaining frequency is stored by the microprocessor and, after the test phase is finished, the lamp is operated within a frequency window formed by the largest number of contiguous modulation frequencies which are suitable for, or result in, stable lamp operation. The test phase is carried out repetitively, at least upon each energization of the lamp, so that different operating characteristics of the lamp (e.g. due to changes in temperature, aging, or the like) are compensated.

摘要翻译： 为了操作放电灯，特别是低功率高压放电灯，仅在安静或稳定的灯操作中，提供微处理器（MC），其建立有限持续时间的测试阶段，在该期间，操作频率 该灯由预定范围内的频率调制变化。 监视灯操作，例如通过在接收灯电流的耦合电容器（C6）上导出测试电压。 如果代表灯操作的监测电压表明灯静音稳定地运行，则微处理器存储随之而来的频率，并且在测试阶段完成之后，灯在由 适用于或导致稳定的灯操作的最大数量的连续调制频率。 至少在灯的每次通电时，重复地执行测试阶段，从而补偿灯的不同操作特性（例如由于温度，老化等的变化）。