Appeal No. 2002-1468
Application 09/038,219
Claim 18 is representative of Appellants’ claimed invention
and is reproduced as follows:
18. A dither unit for a display system that generates
images with a linear display device having a predetermined
display resolution, comprising:
a random value source;
a temporal dither value source;
a first logic circuit for adding values from said random
value source and said temporal dither source to provide spatial-
temporal dither values;
a second logic circuit for receiving a high resolution
signal representing pixel values of said images, said high
resolution signal having a resolution per pixel greater than the
resolution of said display device, less significant bits of said
high resolution signal representing an error component of said
high resolution signal, said second logic circuit adding each
pixel value of said high resolution signal to said spatial-
temporal dither value to provide a dithered high resolution
signal; and
truncation circuitry operable to truncate said dithered high
resolution signal to provide a signal having the display
resolution of said display.
References
The references relied on by the Examiner are as follows:
Lum 5,479,594 Dec. 26, 1995
Shimazaki 5,530,561 Jun. 25, 1996
Rejection at Issue
Claims 18 through 25 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Shimazaki in view of Lum.
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