Patent ID: 8493289
Filing Date: 2013-07-23
Classification: G01J,G02B,G03B

Abstract:
1. In an imaging system wherein a modulated laser light spot is scanned by a scanning mirror onto a display surface, a method of detecting cessation of movement of the light spot, comprising: throughout a scanning interval, directing a portion of light of the scanned light spot during scanning by the scanning mirror onto the display surface onto a light sensor; determining spatial and temporal positioning of the scanned light spot throughout the time interval based on electrical signals from the light sensor; and where such determination indicates cessation of movement of the scanned light spot, controlling at least one of the laser light spot or the scanning mirror to discontinue directing the laser light spot onto the display surface; and further comprising scanning the modulated laser light spot with a test image in an overscan area not scanned onto the display surface; and calibrating at least one of a scanning pattern or color point based on the electrical signals from the light sensor sensing the portion of light from scanning in the overscan area.