Appeal No. 1998-1331
Application No. 08/357,626
BACKGROUND
The invention is directed to a touch-sensitive display apparatus which automatically
adjusts calibration data upon the changing of display parameters. Claim 1 is reproduced
below.
1. A touch-sensitive display apparatus comprising:
a display screen;
a display drive means connected to said display screen for displaying an
image within a display area of said display screen in response to an input video
signal;
a display processor connected to said display drive means for generating, in
response to one or more image control signals, at least one drive control signal for
configuring said display drive means to adjust a parameter of said display area
such that a selected portion of said display area has a different position relative to
said display screen than said selected portion of said display area when said
touch-sensitive display apparatus was last calibrated;
a touch sensing means for generating a touch input signal in response to a
tactile stimulus of said display screen, said touch input signal being indicative of a
location of said tactile stimulus on said display screen;
a touch processor connected to said touch sensing means for converting,
utilizing calibration data stored in a touch memory, said touch input signal into
coordinates defining said location of said tactile stimulus on said display screen
relative to features in said image displayed within said display area of said display
screen;
wherein said display processor includes means for communicating
correction data to said touch processor indicative of said different position of said
selected portion of said display area relative to said display screen, and said touch
processor includes means for automatically adjusting said calibration data stored in
said touch memory to re-align said coordinates generated by said touch processor
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