US 11,057,596 B2
Image projection apparatus and its control method
Yoshiyuki Okada, Sakura (JP); and Ryohei Mitazaki, Chikusei (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 23, 2019, as Appl. No. 16/724,454.
Claims priority of application No. JP2018-244092 (JP), filed on Dec. 27, 2018.
Prior Publication US 2020/0213567 A1, Jul. 2, 2020
Int. Cl. H04N 9/31 (2006.01)
CPC H04N 9/3155 (2013.01) [H04N 9/3188 (2013.01)] 12 Claims
OG exemplary drawing
 
1. 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.