Discharge lamp lighting device for lighting discharge lamps
A transformer and a photocoupler are provided to ensure insulation between a primary side circuit section connected to an alternating current power supply , and a secondary side circuit section for applying a voltage to a lamp . A detection circuit section E, provided in the secondary side circuit s...
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| Main Authors | , , , |
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| Format | Patent |
| Language | English |
| Published |
10.05.2011
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| Online Access | Get full text |
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| Summary: | A transformer and a photocoupler are provided to ensure insulation between a primary side circuit section connected to an alternating current power supply , and a secondary side circuit section for applying a voltage to a lamp . A detection circuit section E, provided in the secondary side circuit section , detects an output voltage and an output current of the lamp to detect a deviation from a predetermined power. A signal corresponding to the deviation, which has been detected by the detection circuit section E, is transmitted to the primary side circuit section via the photocoupler provided between the primary side circuit section and the secondary side circuit section . A switching control section , provided in the primary side circuit section , carries out switching control for constant power lighting based on the signal transmitted from the photocoupler |
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