AMENDMENT #4 to the OLED PATENT LICENSE AGREEMENT (originally effective as of April 19, 2005) by and between Samsung Mobile Display Co., Ltd., as successor to Samsung SDI Co., Ltd. (“SMD”) and Universal Display Corporation (“UDC”)

AMENDMENT #4

to the

OLED PATENT LICENSE AGREEMENT

(originally effective as of April 19, 2005)

by and between

Samsung Mobile Display Co., Ltd., as successor to Samsung SDI Co., Ltd. (“SMD”)

and

Universal Display Corporation (“UDC”)

This Amendment #4 shall amend and modify, to the extent of any inconsistency, the provisions of the above-referenced OLED Patent License Agreement, as previously amended (the “Agreement”).  The effective date of this Amendment #4 is January 1, 2011.

1.   The Extension Period referred to in paragraph 1 of Amendment #2 to the Agreement is hereby extended for three (3) additional months, through March 31, 2011.

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

IN WITNESS WHEREOF, the parties by their duly authorized representatives have agreed to this Amendment #4:

Samsung Mobile Display Co., Ltd.			Universal Display Corporation
By:	/s/ Sungrak Son		By:	/s/ Xxxxxx X. Xxxxxxxx
Name:	Sungrak Son		Name:	Xxxxxx X. Xxxxxxxx
Title:	Vice President		Title:	President
Date:	Dec 15th 2010		Date:	Dec 17, 2010