Discharge lamp unit and projection type image display apparatus using the same
AssigneePanasonic Corporation
InventorMasaru IKEDA
Life of this patent
Estimating the term…
Abstract
Provided is a discharge lamp unit operable to detect a precursor of breakage of a lamp before the lamp is broken and to prevent breakage of the lamp. The discharge lamp unit includes: a discharge lamp; a lighting device for supplying a current to the discharge lamp; and a detection circuit for controlling, by controlling the lighting device, supply of current to the discharge lamp when the detection circuit detects expansion of the discharge lamp. The detection circuit detects a precursor of breakage before expansion of the discharge lamp causes breakage and terminates supply of current to the discharge lamp.
Claims13
A discharge lamp unit comprising:
- a discharge lamp;
- a lighting device for supplying a current to the discharge lamp;
- and
- a detection circuit for controlling, by controlling the lighting device, supply of current to the discharge lamp when the detection circuit detects expansion of the discharge lamp.
A method implemented by a discharge lamp unit including a discharge lamp, the method comprising the steps of:
- supplying a current to the discharge lamp;
- monitoring expansion of the discharge lamp;
- and
- controlling supply of current to the discharge lamp when the expansion of the discharge lamp is detected.
Dependencies are inferred from the claim text.