Appeal No. 2002-1849 Page 6
Application No. 09/116,710
Appellants assert (brief, page 6) that Abileah does not
involve the formation of a holographic image or a hologram in a
holographic screen, but rather relates to a liquid crystal
display. Appellant acknowledges that Abileah discloses a
holographic diffuser, but argues (brief, page 7) that Abileah has
no disclosure of a holographic screen for display of a
holographic image.
From our review of Abileah, we find that Abileah is directed
to a liquid crystal display having an enlarged viewing zone (col.
1, lines 5 and 6). Abileah discloses (col. 2, lines 37-41) that
it is desirable to have an LCD reflect as little ambient light as
possible. In addition,(col. 8, line 56 through col. 9, line 35)
the normally white and normally black displays of Abileah,
referred to by the examiner, result from a change in orientation
of the transmission axes of polarizers 3 and 15, and do not
relate to an intrinsic surface coloration of the holographic
screen. The optional holographic diffuser 21, like facets 19 of
optical film 17 of Abileah, act to diffuse or spread the image of
the liquid crystal display in a large number of directions, as
the image is reflected from light scattering or roughened surface
133 of diffuser 21, so that the sharp images of the display are
clearly viewable over a wide range of horizontal and vertical
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