Invention Grant
US09122060B2 Scanning image projector and method of driving scanning image projector 有权
扫描图像投影机和驱动扫描图像投影仪的方法

Scanning image projector and method of driving scanning image projector
Abstract:
A scanning image projector includes a laser light source, an MEMS scanner having a reflecting mirror which vibrates around first and second axes that are orthogonal to each other, and an MEMS control unit having a high speed drive circuit which causes resonant vibration of the reflecting mirror at high speed around the first axis, a low speed drive circuit which causes non-resonant vibration of the reflecting mirror at low speed around the second axis, and an offset drive circuit which offsets a position on the second axis in a non-resonant vibration region where the low-speed vibration is caused by a predetermined amount, wherein the MEMS control unit displays an image in a predetermined display region by drive signals from the high and the low speed drive circuits, and moves a position of the display region in the non-resonant vibration region by an offset signal from the offset drive circuit.
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