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US 2011/0298389 A1Published application
Discharge lamp lighting apparatus and discharge lamp lighting method
AssigneePanasonic Corporation
InventorKensuke Nagauchi
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AssigneePanasonic Corporation
InventorKensuke Nagauchi
Estimating the term…
A discharge lamp lighting apparatus of the present invention comprises: a power supply section for supplying a discharge lamp voltage prescribed in accordance with the characteristic of the discharge lamp; an inverter for inversely converting the discharge lamp voltage supplied by the power supply section into an AC voltage to be applied to the discharge lamp; and a control section for controlling the discharge lamp voltage in the power supply section and a drive frequency in the inverter, based on the AC voltage applied to the discharge lamp and an AC current flowing in the discharge lamp. The control section controls the discharge lamp voltage in the power supply section and the drive frequency in the inverter such that the AC current flowing in the discharge lamp becomes a square wave having a high-frequency block that is a high-frequency interval, and a low-frequency block that is a low-frequency interval, and that the square wave has spikes so as to make the current value (absolute value) of the AC current as it is just before the polarity of the AC current inverts larger than the current value (absolute value) as it is just after the polarity inverts.
A discharge lamp lighting apparatus for lighting a discharge lamp, the discharge lamp lighting apparatus comprising:
A discharge lamp lighting method executed by a discharge lamp lighting apparatus for lighting a discharge lamp, the discharge lamp lighting method comprising:
Dependencies are inferred from the claim text.