| http://www.w3.org/ns/prov#value | - When the projection type display apparatus is a rear projection type display apparatus always used for appreciation, the present invention is applicable within a range that the laser beam power of the semiconductor light source satisfies class-1 laser safety standard. [0074] (Breakdown Display by Laser Beam Source) [0075] If the discharge bulb and the semiconductor light-emitting element such as l
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