Appeal No. 96-3564
Application 08/274,133
BACKGROUND
The present invention relates to a method and apparatus for displaying text on a
computer screen in a "dark on white" fashion, and particularly displaying text with a normal
mode and a highlighted mode on the screen at the same time. The method and apparatus
employ a highlight mode (second mode) where the text is black-on-white, and a normal
mode (first mode) where the text is gray-on-white. The background stays the same in both
modes which are concurrently displayed on the screen. The background has the highest
luminance and the foreground changes from gray to black. This change increases the
contrast/difference between the background and foreground, but decreases the overall
luminance on the screen. The luminance of the black-on-white is less than that of the gray-
on-white.
Appellants have indicated that claims 10-33 stand or fall together. (Brief at page 3.)
Independent claim 26 is representative of the invention and reproduced as follows:
26. A method of generating pixel luminance signals corresponding to text to
be displayed comprising the steps of:
a) selectively generating an intensity signal specifying a first mode or
a second mode;
b) receiving an intensity signal specifying a first mode for selected
first text or a second mode for highlighting selected second text
concurrently displayed with first text; and
2
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Last modified: November 3, 2007