Not an answer, but an attempt to save the time of people looking for answers. The following have already been presented to the USPTO by the applicant so "finding" them will not add anything.
Issued Patents
1 76899087689908 2010-03-30 Yan,et al.
2 76895837689583 2010-03-30 Bozich, et al.
3 71805317180531 2007-02-20 Gery, et al.
4 65492146549214 2003-04-15 Patel, et al.
5 62136536213653 2001-04-10 Borg, et al.
Patent Applications
1 2008006566820080065668 A1 2008-03-13 Spence, et al.
2 2008003042520080030425 A1 2008-02-07 Fullerton, et al.
3 2005001272320050012723 A1 2005-01-20 Pallakoff, Matt.
Non-Patent Literature
"Overview of Resolution Independence", Retrieved at http://developer.apple.com/library/mac/#documentation/UserExperience/Conceptual/HiDPIOverview/HiDPIConceptslHiDPIConcepts.html, Retrieved Date: June 7, 2011, Pages 7.