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1. A projection-type display apparatus, comprising: a liquid crystal panel including a panel pixel; an optical path shift element configured to shift a position of a projection pixel every k unit periods, from a first unit period to a k-th unit period, included in one frame period, the projection pixel being projected from the panel pixel, k being an integer of 2 or greater; and a display control circuit configured to control the liquid crystal panel and the optical path shift element, wherein the display control circuit is configured to supply a data signal corresponding to a gray scale level designated by pixel data forming video data, to the panel pixel for each unit period, control the optical path shift element to shift the position of the projection pixel for each unit period, control the optical path shift element so that a position of the projection pixel in a first frame period and a position of the projection pixel in a second frame period after the first frame period include different positions, and when in the first frame period, a difference in gray scale level between pixel data corresponding to a first panel pixel and pixel data corresponding to a second panel pixel is equal to or larger than a threshold in one unit period, the first panel pixel and the second panel pixel being adjacent to each other, correct at least one of a gray scale level of first pixel data corresponding to the first panel pixel in a unit period subsequent to the one unit period or a gray scale level of second pixel data corresponding to a panel pixel to which the first pixel data is supplied in the second frame period, so as to reduce a difference in luminance between a panel pixel to which the first pixel data is supplied in the subsequent unit period and a panel pixel to which the second pixel data is supplied in the second frame period.
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