Patent ID: 8066385

Claim:
A projection display which modulates a luminous flux into an optical image for an image display device, and projects the optical image from a projection lens, comprising: a laser light source configured to emit a luminous flux; a diffusion optical device configured to diffuse the luminous flux emitted from the laser light source; an oscillation unit configured to oscillate the diffusion optical device back and forth in a linear direction perpendicular to the direction of the luminous flux; an oscillation driving unit configured to drive the oscillation unit; a light source driving unit configured to drive the laser light source; a control unit configured to control the driving of the light source driving unit, based at least in part on a driving waveform; at least one additional oscillation unit; and at least one additional oscillation driving unit; wherein each additional oscillation driving unit corresponds to a respective additional oscillation unit; and wherein each oscillation driving unit generates a waveform with a phase different from a phase of a respective waveform generated by any other oscillation driving unit.