Interference No. 104,649
Page No. 44
respect to a normal axis. As such, Keagy alleges that it would have been obvious to one of
ordinary skill in the art to reduce the aberration of Zhou by reducing the angle of the light rays
coming from the exit surfaces. Keagy states that a second prism sheet could be used to reduce
the angles. (Paper No. 30, pages 9-10).
Zhou disagrees with Keagy's analysis of the prior art and its teachings. At the outset,
Zhou argues that none of the prior art references cited by Keagy disclose or suggest the use of
two sheet prisms stacked substantially in parallel. Moreover, Zhou argues that Igaki teaches that
a trapezoidal distortion problem may be corrected through the use of a "holographic fingerprint
sensor." (See Igaki, KX 1002, p. 1794). As such, Zhou argues that one skilled in the art reading
Igaki would be guided to a holographic fingerprint sensor rather than the claimed addition of a
second-prism type device to bend light to a different location. (Zhou. Opposition 1, Paper No. 33,
pages 5-6).
Additionally, Zhou states that the brightness enhancement sheets (BEF) cited by Keagy
were commonly used for enhancing the brightness in displays. Specifically, Zhou argues that the
BEF sheets enhanced brightness by "converting a set of light rays occupying a large range of
angles into a set that occupies a smaller set of angles." (Paper No. 33, p. 6).
In support of its Opposition, Zhou cites a declaration of Prof. Mark A Neifeld.
Specifically, Professor Neifeld testified that:
(6) Based on my experience in the optics field, it is my opinion that the
invention of Zhou's claim I I would not have been obvious to a person of
ordinary skill at the time the invention was made, even if such a person
were presented with the fingerprint system of either claims I or 10 of the
'858 patent, taken in consideration with the references of Exhibits 1002
1004.
Page: Previous 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Next
Last modified: November 3, 2007