Patent ID: 6650321
Filing Date: 2003-11-18
Classification: G09G

Abstract:
A method of controlling an image parameter of an image displayed on a multi-synchronization display, said image parameter being one of increase vertical size of image, decrease vertical size of image, increase horizontal size of image, decrease horizontal size of image, move image up, move image down, move image to right, and move image to left, said method comprising the steps of:(a) determining whether there is an image parameter input from a user for controlling an image parameter of the image; (b) setting a variable range of a reference value determined when the display was fabricated, upon it being determined that there is no image parameter input from the user; (c) upon the variable range being set, determining whether the user has operated a control key for changing an image parameter of the displayed image; and (d) upon it being determined that the user has operated the control key, increasing or decreasing image parameter data according to the image parameter input by the user; wherein all of said determining steps are carried out entirely by software means in a programmed microcomputer; and wherein the step (d) of increasing or decreasing image parameter data comprises the steps of: (d1) upon it being determined that the user has operated the control key for increasing the image parameter data, determining whether the increased image parameter data is greater than or equal to a predetermined maximum value of the variable range; (d2) if the increased image parameter data is not greater than or equal to the predetermined maximum value of the variable range, increasing the image parameter data according to the image parameter input from the user; (d3) upon it being determined that the user has operated the control key for decreasing the image parameter data, determining whether the decreased image parameter data is less than or equal to a predetermined minimum value of the variable range; and (d4) if the decreased image parameter data is not less than or equal to the predetermined minimum value of the variable range, decreasing the image parameter data according to the image parameter input from the user.