Patent ID: 7239308

Claim:
An image display apparatus comprising: a plurality of scanning lines extending in the horizontal direction and arranged in the vertical direction; a scanning line control circuit connected to any one of right and left ends of said plurality of scanning lines and for applying a scanning voltage to said plurality of scanning lines successively in the vertical direction; a plurality of signal lines extending in the vertical direction and arranged in the horizontal direction; a signal line control circuit connected to said plurality of signal lines and for applying a drive voltage conformable to an inputted image signal to said plurality of signal lines; electron sources each connected to each of intersections of said plurality of scanning lines and said plurality of signal lines and emitting electrons in accordance with a potential difference between said scanning voltage and said drive voltage; and a correction circuit wherein said correction circuit produces a first correction signal for giving an offset to said drive voltage supplied to each of said electron sources of one selected line or said scanning voltage and a second correction signal for increasing said potential difference at each of said electron sources of said one selected line in accordance with a distance between said electron sources and said scanning line control circuit when respective image signals for said electron sources of said one selected line are equal to each other.