| 摘要 |
According to one embodiment, a projection type display apparatus, which modulates a laser beam generated from a laser beam generating element according to an input video signal and projects the modulated laser beam onto a screen via a projection lens so as to display a video, sets a light quantity of the laser beam based on information representing a size of the screen so that an optical power of the laser beam per unit area on the screen falls within a range conforming to predetermined safety standards and brightness on the screen can be secured at a maximum, and controls the laser beam generating element so that the laser beam of the set light quantity is generated.
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