Appeal No. 2002-1849 Page 8
Application No. 09/116,710
specified [in the claims], and asserts (id.) that Branca was
introduced to show the particular feature of intrinsic surface
coloration. The examiner asserts (answer, page 5) that Branca
teaches the use of a holographic screen wherein a property of a
surface of the holographic screen is that it has an intrinsic
coloration which is one of black, grey and a dark color. The
examiner points to col. 3, lines 20-31, lines 40-44, col. 9,
lines 26-30 and 38-48, and col. 2, lines 37-46.
Appellants assert (brief, pages 8 and 9) that Branca is
directed to a color compensation arrangement which compensates
for the fact that polarizers used in the display create a
distinctly perceptible hue, for example "bluish", "redish", etc,
and that Branca provides a chromatically adjusted display which
is diffusely illuminated by and viewable under ambient light. It
is argued (id.) that Branca provides a liquid crystal display,
not a holographic display, and does not teach or suggest the use
of a holographic screen which is black, grey or a dark color in
ambient light. It is further argued (brief, page 9) that the
purpose of the holographic diffuser element in Branca is to
achieve uniformity of illumination, and that Branca discloses the
use of reflective pigments into light reflective layer 110 which
is applied to the holographic transmission diffuser.
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