Appeal No. 2002-1849 Page 10
Application No. 09/116,710
or layers into the LCD to compensate for the color tainting, such
that the overall background illumination is perceptually
achromatic (col. 2, lines 54-60). It is a principal object of
the invention (col. 3, lines 41-44) to provide:
a chromatically-adjusted holographically-illuminated
display viewable under ambient light without
requirement of a supplemental internal light source,
thereby reducing bulk and power requirements.
As shown in figure 1, display 10 is chromatically adjusted and
comprises at least an image providing display element 200 and a
reflective holographic diffuser 100 (col. 4, lines 36-40).
Coloring material is added in quantities or densities
sufficient to effect the output of the display toward substantial
achromaticity (col. 5, lines 40-43). While the coloring material
can be added to the LCD stack 200 or to reflective holographic
diffuser 100, the coloring material is more easily incorporated
into a color compensatory light filter layer 300 (figure 1, and
col. 5, lines 47-51). Branca further discloses that although the
invention is not limited to any particular display format, that
the display is configured as a reflectively viewable LCD col. 6,
lines 55-58). Holographic diffuser 100 comprises a light
reflective layer 110 deposited onto holographic transmission
diffuser 100. A reflective holographic diffuser is accomplished
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