Method of driving discharge lamp, driving device, and projector
AssigneeSeiko Epson Corporation
InventorsKentaro Yamauchi, Takeshi Takezawa
Life of this patent
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Abstract
A method for driving a discharge lamp that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light includes, during a steady operation in which the AC current is supplied to the discharge lamp, changing a difference between the absolute values of average current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.
Claims13
A method for driving a discharge lamp that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light, the method comprising:
- during a steady operation in which the AC current is supplied to the discharge lamp, changing a difference between the absolute values of current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.
A driving device that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light, the driving device comprising:
- a current driving circuit that, during a steady operation in which the AC current is supplied to the discharge lamp, changes a difference between the absolute values of current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.
Dependencies are inferred from the claim text.