| CPC G03B 21/142 (2013.01) | 22 Claims |
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19. A projection device, wherein the projection device comprises an illumination system, a light valve, a projection lens, and an actuator device, wherein
the illumination system is adapted to emit an illumination beam;
the light valve is located on a transmission path of the illumination beam, and the light valve is adapted to convert the illumination beam into an image beam;
the projection lens is located on a transmission path of the image beam, and the projection lens is adapted to project the image beam; and
the actuator device is located on a transmission path of the image beam, and the actuator device is disposed between the light valve and the projection lens or disposed in the projection lens, wherein the actuator device comprises a base, a frame body, an optical element, at least one driving assembly, and a controller, wherein
the frame body is disposed in the base;
the optical element is disposed in the frame body;
the at least one driving assembly is disposed between the base and the frame body; and
the controller is coupled to the at least one driving assembly,
wherein the controller is adapted to control the at least one driving assembly to drive the frame body by a signal so that the optical element reciprocally swings relative to the base based on a first moving shaft, a second moving shaft, and a third moving shaft,
wherein the signal comprises a first driving signal corresponding to the first moving shaft, a second driving signal corresponding to the second moving shaft, and a third driving signal corresponding to the third moving shaft,
wherein the first driving signal and the second driving signal comprise a first frequency, and the third driving signal comprises a second frequency different from the first frequency,
wherein a phase difference between the first driving signal and the second driving signal is not equal to zero.
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