Patent ID: 7661830
Filing Date: 2010-02-16
Classification: F21V,H01J,H04N

Abstract:
1. A lamp device, comprising: an arc tube provided with a bulb portion, a pair of sealing portions formed continuously from the bulb portion in a longitudinal direction, a pair of electrodes encapsulated inside of the bulb portion, electrode axes sealed respectively inside of the pair of sealing portions, and conductor foils sealed respectively inside of the pair of sealing portions, each of the electrode axes having a first termination and a second termination, each of the first terminations of the electrode axes bring respectively the conductor foils into conduction, each of the electrodes being respectively at the second terminations of the electrodes; a main reflection mirror, to which one of the pair of sealing portions is fixed, that reflects light emitted from the arc tube toward an illuminated region; and a sub-mirror, the sub-mirror having a cup-shaped reflection base portion where a reflection surface is formed and a cylinder portion formed to extend from the reflection base portion, the reflection surface reflecting light emitted from the bulb portion toward the bulb portion, an outer diameter of the cylinder portion being smaller than an outer diameter of the cup-shaped reflection base portion, the sub-mirror being bonded with a bonding agent between the other of the pair of sealing portions and the cylinder portion, wherein the bonding agent is located in a portion away from the bulb portion and without overlapping, in the longitudinal direction, the first termination of the electrode axis.