Patent ID: 8373690
Filing Date: 2013-02-12
Classification: G02B,G03B,H04N

Abstract:
1. A scanning image display apparatus comprising: a light source section that emits a laser beam; a scan mirror that scans the laser beam two-dimensionally in a first direction and a second direction which intersects the first direction; and a control section that drives the scan mirror, wherein the control section drives the scan mirror such that a scan frequency in the first direction becomes higher than a scan frequency in the second direction, and changes the scan frequency in the first direction in synchronization with a period of the scan frequency in the second direction to change a scan amplitude in the first direction, wherein when the laser beam scanned by the scan mirror is obliquely projected onto a projection plane, the second direction is set to a direction that a projection distance from the scan mirror to the projection plane is changed, and wherein the control section gradually raises the scan frequency in the first direction from the fundamental frequency when the projection distance is increased gradually by the scan operation in the second direction, and gradually lowers the scan frequency in the first direction to return the scan frequency to the fundamental frequency when the projection distance is decreased gradually by the scan operation in the second direction.