Appeal No. 2002-1996 Page 3
Application No. 09/086,312
(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.
5. 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,
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