LIGHT SOURCE DEVICE AND PROJECTION TYPE DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a light source device which adjusts impedance.

SOLUTION: The impedance of a coaxial line is determined by determining and preparing quantities and positions of adjusting rings 55. There is advantage for widening an adjusting width of impedance by selecting the adjusting ring 55 as one piece or numerous pieces. Thus, the highly efficient light source device is attained since such troubles wherein a conventional lamp does not light up and light becomes dark is solved by adjusting impedance of the coaxial line.

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