Appeal No. 1997-0384
Application 08/086,498
display circuit and display signal generator used in
controlling the scrolling of characters across a display
screen. Scrolling is effected by first displaying a character
in a given location, followed by a "blanking" period where the
character is blanked at the given location for a length of
time, and lastly a different character is displayed at the
same given location. In this manner a word, symbol, or number
can be moved across an LCD screen. As indicated in the
specification (pages 2 and 4), appellants recognized that
prior art LCD’s suffered from difficulties in scrolling such
as interference between sequentially generated characters
which are being displayed on a display device (see
specification, page 4). Appellants have recognized that such
"runover" or "interference" degrades image quality of scrolled
images on the display (see specification, page 4). To
overcome this problem, appellants provide a display signal
generator to perform a blanking operation for a time interval
proportional to the decay rate of the display screen, thereby
overcoming the problem in the prior art of interference
between sequential characters which are displayed in the same
image frame during a scrolling operation.
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