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AMENDMENT #1
 
to the
 
COMMERCIAL SUPPLY AGREEMENT
(Originally effective April 5, 2007)
 
by and between
 
Chi Mei EL Corporation (“CMEL”)
 
and
 
Universal Display Corporation (“UDC”)

This Amendment #1 shall amend and modify, to the extent of any inconsistency,
the provisions of the above-referenced Commercial Supply Agreement (the
“Agreement”).  The effective date of this Amendment #1 is December 31, 2008.

The Agreement is hereby amended to such that the term of the Agreement shall
continue for one (1) additional year, through December 31, 2009.  Toward this
end, the Section 9.1 of the Agreement is hereby amended and restated as follows:

“Unless otherwise extended by mutual written agreement of the parties, the term
of this Agreement shall commence on the Effective Date and shall continue until
the sooner of December 31, 2009, or the date on which this Agreement is
terminated as permitted hereunder.”

Except as set forth herein, all other terms and conditions of the Agreement
shall remain in full force and effect.

IN WITNESS WHEREOF, the parties by their duly authorized representatives have
agreed to this Amendment #1:

Chi Mei EL Corporation
 
Universal Display Corporation
     
By:
   /s/ Sung Soo Park
 
By:
   /s/ Steven V. Abramson
Name:
   Sung Soo Park
 
Name:
   Steven V. Abramson
Title:
   President
 
Title:
   President
     
Date:
   2009.2.26
 
Date:
   March 16, 2009