EXHIBIT 32.1

                           CERTIFICATIONS REQUIRED BY
               RULE 13A-14(B)/15D-14(B) AND 18 U.S.C. SECTION 1350

In connection with the quarterly report of Universal Display Corporation (the
"Company") on Form 10-Q for the quarter ended June 30, 2004, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Sherwin
I. Seligsohn, Chairman of the Board and Chief Executive Officer of the Company,
hereby certify, based on my knowledge, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of
the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material
respects, the financial condition and result of operations of the Company.

Date: August 5, 2004               By:       /s/ Sherwin I. Seligsohn
                                         --------------------------------------
                                         Sherwin I. Seligsohn
                                         Chairman of the Board and Chief
                                         Executive Officer