Appeal No. 96-1855
Application 07/953,807
the contents of the display data [as compared to the contents
of preceding display data held in a line memory], so that the
flickerless halftone displays are possible at all times
irrespective of display patterns." (Appellants' specification
at page 37 lines 6-13.)
In a second embodiment, Appellants generate
halftone data on the basis of the display data of a current
line (in other words, without employing any line memory and
without regard to the display data of a preceding line). In
this embodiment, the phase of changing over the first data
(e.g. ON) and the second data (e.g. OFF) is made different for
every pixel and for every line. For a halftone data pixel,
whether the first data (e.g. ON) or the second data (e.g. OFF)
is displayed first is previously determined based on (1) a
position of the pertinent line in a frame and (2) whether the
halftone pixel is assigned to an even frame or an odd frame.
The phase of changing over the first data (e.g. ON) and the
second data (e.g. OFF) is successively inverted at each
halftone data pixel on the pertinent line beginning with the
first halftone data pixel.
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