Patent ID: 7940535
Filing Date: 2011-05-10
Classification: H05B,Y02B

Abstract:
1. A discharge lamp lighting device for lighting a discharge lamp, the device comprising: a primary side circuit section connected to a power supply; a transformer, connected to the primary side circuit section, for transforming a voltage; a secondary side circuit section, connected to the transformer, for applying the transformed voltage to the discharge lamp; a detection circuit section, provided in the secondary side circuit section, for detecting an output voltage and an output current of the discharge lamp to detect a deviation from a predetermined power; a signal transmission element, provided between the primary side circuit section and the secondary side circuit section, for transmitting a signal corresponding to the deviation, which has been detected by the detection circuit section, to the primary side circuit section; and a switching control section, provided in the primary side circuit section, for carrying out switching control for constant power lighting based on the signal transmitted from the signal transmission element, wherein a secondary side winding of the transformer comprises a first winding and a second winding, the secondary side circuit section comprising: