Patent ID: 7630112

Claim:
An image display apparatus capable of displaying an image on a given plane of projection by beam raster scanning, the image display apparatus comprising: (a) an actuator part capable of causing a movable part to oscillate about a first axis and a second axis, said movable part having a reflecting surface reflecting a light beam emitted from a given light source, said second axis intersecting with said first axis at approximately a right angle; and (b) a main scanning unit driving said actuator part based on a drive signal having a frequency component around a resonant frequency relevant to oscillatory motion of said movable part, to cause said movable part to oscillate about said first axis, thereby scanning said light beam reflected off said reflecting surface in a main scanning direction of said raster scanning, said main scanning unit including: (b-1) a correction-signal generator generating a correction signal for use in correcting distortion of a displayed image on said given plane of projection, said distortion occurring when said actuator part is driven based on a reference drive signal for use as said drive signal to cause said movable part to oscillate about said first axis; and (b-2) a regulator regulating said reference drive signal based on said correction signal to generate said drive signal, said image display apparatus further comprising: (c) a sub-scanning unit driving said actuator part to cause said movable part to oscillate about said second axis, thereby scanning said light beam reflected off said reflecting surface in a sub-scanning direction of said raster scanning.