| 摘要 |
A method for regulating the ignition voltage of a discharge lamp (1) and the corresponding electronic ballast circuit, wherein said discharge lamp (1) is supplied with AC operating voltage by a half-bridge inverter circuit comprising two transistors (Q1, Q2). The current flowing through one transistor (Q1) of said two transistors (Q1, Q2) is detected, and the detected current iscompared with a predetermined reference value. When the detected current exceeds the predetermined reference value, the driving period of said one transistor (Q1) is immediately terminated and the driving period of the other transistor (Q2) of saidtwo transistors (Q1, Q2) is started, and the driving period of said other transistor (Q2) is made to bethe same as the terminated driving period of the one transistor (Q1).
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