An image display method of alternately displaying first and second video frames on a liquid crystal display panel comprising a pixel region, wherein the first and second video frames correspond to left eye and right eye images or mutually-different view images respectively and black insertion by black-mask pixels is provided to the first and second video frames, characterized by the steps of: - dividing each first of the first and second video frames, in a time division manner, into f divided first video frames, f being an integer equal to or greater than 2, and f divided second video frames, respectively, and alternately arranging each of the divided first video frame with a respective divided second video frame, - defining basic regions in the pixel region of the liquid crystal panel, each basic region being a pixel region having m pixels arrayed in a matrix, wherein m is an even number equal to or greater than 4; - setting the number n of the black-mask pixels in the basic region, wherein n is an even number less than m and equal to or greater than 2; - preparing m mask patterns by disposing the black-mask pixels in the basic region in m different arrangements, respectively, whereby each of the m mask patterns has a different arrangement of the n black-mask pixels in the basic region; - selecting for each of the arranged divided first and second video frames one mask pattern of the m mask patterns, and obtaining m sequentially synthesized successive frames by applying the m selected mask patterns to the basic regions such that a black-mask pixel is disposed in each of the pixels in the basic regions by the same number of times throughout the alternatively arranged divided first video frames of the m sequentially synthesized successive frames and throughout the alternatively arranged divided second video frames of the m sequentially synthesized successive frames, - alternately displaying the m sequentially synthesized successive frames on the liquid crystal panel wherein one synthesized divided first video frame and one synthesized divided second video frame are displayed in turn. - dividing each first of the first and second video frames, in a time division manner, into f divided first video frames, f being an integer equal to or greater than 2, and f divided second video frames, respectively, and alternately arranging each of the divided first video frame with a respective divided second video frame, - defining basic regions in the pixel region of the liquid crystal panel, each basic region being a pixel region having m pixels arrayed in a matrix, wherein m is an even number equal to or greater than 4; - setting the number n of the black-mask pixels in the basic region, wherein n is an even number less than m and equal to or greater than 2; - preparing m mask patterns by disposing the black-mask pixels in the basic region in m different arrangements, respectively, whereby each of the m mask patterns has a different arrangement of the n black-mask pixels in the basic region; - selecting for each of the arranged divided first and second video frames one mask pattern of the m mask patterns, and obtaining m sequentially synthesized successive frames by applying the m selected mask patterns to the basic regions such that a black-mask pixel is disposed in each of the pixels in the basic regions by the same number of times throughout the alternatively arranged divided first video frames of the m sequentially synthesized successive frames and throughout the alternatively arranged divided second video frames of the m sequentially synthesized successive frames, - alternately displaying the m sequentially synthesized successive frames on the liquid crystal panel wherein one synthesized divided first video frame and one synthesized divided second video frame are displayed in turn.