| 摘要 |
A multidisplay apparatus forms one screen of image by having projection pictures of a plurality of image display apparatuses to be adjacent to each other. Each image display apparatus includes: a brightness decreasing characteristic memory unit that stores a look up table indicating an average brightness decreasing characteristic of a projection lamp; a timer unit that counts lighting hours of a lamp of the image display apparatus itself; a lighting hours memory unit that stores therein lighting hours accumulated since the operating start of a lamp of the image display apparatus; and an external communication unit that communicates with the other image display apparatuses. Each of the plurality of image display apparatuses exchanges lighting hours with one another via the external communication units, estimates brightness of a lamp of an image display apparatus whose lighting hours are the longest of all the image display apparatuses, by referring to the lighting hours of the image display apparatus whose lighting hours are the longest and the look up table in the brightness decreasing characteristic memory unit of its own, and corrects the brightness of its own projection picture in accordance with the estimated lamp brightness. <IMAGE> |
