Discharge lamp lighting device, lamp failure detection method, and projector
AssigneeNEC Display Soilutions, Ltd.
InventorsKoichi TAGISHI, Hiroki TANAKA, Yasuji KAWAI
Life of this patent
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Abstract
A discharge lamp lighting device includes: a storage unit that stores information; a lamp drive unit that supplies drive power to the discharge lamp; a voltage detection unit that detects the lamp voltage of the discharge lamp; and a control unit that, on the basis of the voltage detection value supplied from the voltage detection unit, stores in the storage unit error log information that indicates the operating state of the discharge lamp when change of the lamp voltage indicates a predetermined voltage characteristic.
Claims19
A discharge lamp lighting device that controls lighting of a discharge lamp comprising:
- a storage unit that stores information;
- a lamp drive unit that supplies drive power to said discharge lamp;
- a voltage detection unit that detects lamp voltage of said discharge lamp;
- and
- a control unit that, on the basis of the voltage detection value that is supplied from said voltage detection unit, stores in said storage unit error log information that indicates the operating state of said discharge lamp when change of said lamp voltage indicates a predetermined voltage characteristic.
A lamp failure detection method that is implemented in a discharge lamp lighting device that controls lighting of a discharge lamp, said method comprising:
- detecting lamp voltage of said discharge lamp, and storing in a storage unit error log information that indicates the operating state of said discharge lamp when, on the basis of the voltage detection value, a change of said lamp voltage indicates a predetermined voltage characteristic.
Dependencies are inferred from the claim text.