Image projection apparatus and its control method
AssigneeCanon Kabushiki Kaisha
InventorsYoshiyuki Okada, Ryohei Mitazaki
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Abstract
An image projection apparatus configured to project image light and to display a projection image includes a light modulation element driven according to an image signal and configured to modulate incident light to generate the image light, a shifter configured to shift a plurality of pixels of the projection image by changing an optical path of the image light, and a controller configured to control driving of the shifter. The controller changes a driving method of the shifter according to a frame rate of the image signal.
Claims12
An image projection apparatus configured to project image light and to display a projection image, the image projection apparatus comprising:
- a light modulation element driven according to an input image signal and configured to modulate incident light to generate the image light;
- a shifter configured to shift a plurality of pixels of the projection image by changing an optical path of the image light;
- and
- a controller configured to control a driving of the shifter,
- wherein the controller selects a driving method of the shifter such that the plurality of pixels of the projection image are shifted by the shifter according to a frame rate of the input image signal,
- wherein when the frame rate of the input image signal is a first frame rate, the controller controls the driving of the shifter by a same driving method for two successive frame periods, and
- wherein when the frame rate of the input image signal is a second frame rate different from the first frame rate, the controller controls the driving of the shifter by different driving methods for two successive frame periods.
A control method of an image projection apparatus that includes a light modulation element driven according to an input image signal and configured to modulate incident light to generate image light, and a shifter configured to shift a plurality of pixels of a projection image formed by the image light by changing an optical path of the image light, the control method comprising:
- acquiring a frame rate of the input image signal;
- and
- selecting a driving method of the shifter such that the plurality of pixels of the projection image are shifted by the shifter according to the acquired frame rate of the input image signal,
- wherein when the frame rate of the input image signal is a first frame rate, the controller controls the driving of the shifter by a same driving method for two successive frame periods, and
- wherein when the frame rate of the input image signal is a second frame rate different from the first frame rate, the controller controls the driving of the shifter by different driving methods for two successive frame periods.
A non-transitory computer-readable storage medium storing a computer program that causes a computer in an image projection apparatus to execute a control method, the image projection apparatus including a light modulation element driven according to an input image signal input and configured to modulate incident light to generate image light, and a shifter configured to shift a plurality of pixels of a projection image formed by the image light by changing an optical path of the image light, the control method comprising:
- acquiring a frame rate of the input image signal;
- and
- selecting a driving method of the shifter such that the plurality of pixels of the projection image are shifted by the shifter according to the acquired frame rate of the input image signal,
- wherein when the frame rate of the input image signal is a first frame rate, the controller controls the driving of the shifter by a same driving method for two successive frame periods, and
- wherein when the frame rate of the input image signal is a second frame rate different from the first frame rate, the controller controls the driving of the shifter by different driving methods for two successive frame periods.
Dependencies are inferred from the claim text.