Projection type image display apparatus

A projection type image display apparatus for projecting a laser beam on a projection surface through a projection window of a main body to display images, comprising:

• a main body having a laser beam emitting section for emitting said laser beam, said laser beam emitting section including
• a laser source for emitting said laser beam;
• a first laser beam deflector for deflecting said laser beam from said laser source to scan said laser beam either in a horizontal or a vertical direction;
• and
• a second laser beam deflector for deflecting said laser beam from said first laser beam deflector to scan said laser beam in the other direction;
• an infrared sensor for detecting human presence in a detection area including a projection area of said laser beam extending from said projection window to said projection surface and a peripheral area around said projection area, said infrared sensor having a light receiving angle larger than a maximum projection angle of said laser beam projected through said projection window;
• and
• a laser beam power controller for controlling a power level of said laser beam to a predetermined level when said infrared sensor detects human presence in said detection area while said laser beam is being outputted,
• wherein said infrared sensor is disposed behind said second deflector and aligned to said projection axis of said laser beam projected through said projection window.