Appeal No. 96-0550
Application 07/960,148
optical system for projection of a display which includes a
matrix of mirrors. Each mirror in the matrix is individually
controllable between at least two states (Col. 3, line 66 to Col.
4, line 4, lines 33-41). In a quiescent state each mirror
reflects light along an optical path which impinges on a
reflecting portion of a Schlierin optical device and returns to
the original light source (Col. 4, lines 4-10). In a deformed
state, each mirror reflects light along an optical path directed
to a transmitting portion of the Schlierin optical device. The
light passes through to Schlierin's optical device onto a viewing
screen (Col. 4, lines 33-41). Each mirror may have
more than one deformed state so that the viewing screen can be
illuminated with different intensities so as to provide gray
scale (Col. 5, lines 7-12). According to the examiner, Ott does
not teach that the device can be used in a vehicle display system
or that gray scale can be used to reduce the perception of a
double image.
Iino discloses an optical projector for a head up
display for a vehicle (Fig. 1A, Col. 3, lines 8-11).
Lasher discloses a method of reducing the usual
perception of jagged or stepped edges produced by bilevel
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