Appeal 2007-1351
Application 10/628,942
INTRODUCTION
The claims are directed to a display device that comprises a light
guide and a movable element. A force is exerted for optical contact between
the movable element and the light guide, with light emanating from the
display at the locations where optical contact takes place. Appellant’s
invention relates to different measures that may be taken to reduce the force
necessary for moving the movable element. (See Abstract.) Claims 1 and
19 are illustrative:
1. A display device comprising:
a light guide;
a movable element; and
selection means to locally bring the movable element into contact with
the light guide;
wherein the movable element is situated in an evacuated space below
0.1 atmosphere.
19. A display device comprising:
a light guide;
a movable element; and
selection means to locally bring the movable element into contact with
the light guide,
wherein at least one of the movable element and the light guide is
provided with an anti-adhesion layer on the side at which the contact is made
between the movable element and the light guide.
The Examiner relies on the following prior art references to show
unpatentability:
Adachi US 5,631,664 May 20, 1997
Stern US 5,771,321 Jun. 23, 1998
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