    <SEC-DOCUMENT>0001564590-21-020102-index.html : 20210422
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    <ACCEPTANCE-DATETIME>20210422160524
    ACCESSION NUMBER:		0001564590-21-020102
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20210422
    DATE AS OF CHANGE:		20210422

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			UNIVERSAL DISPLAY CORP \PA\
    		CENTRAL INDEX KEY:			0001005284
    		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRONIC COMPONENTS & ACCESSORIES [3670]
    		IRS NUMBER:				232372688
    		STATE OF INCORPORATION:			PA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12031
    		FILM NUMBER:		21844799

    	BUSINESS ADDRESS:
    		STREET 1:		375 PHILLIPS BOULEVARD
    		CITY:			EWING
    		STATE:			NJ
    		ZIP:			08618
    		BUSINESS PHONE:		6096710980

    	MAIL ADDRESS:
    		STREET 1:		375 PHILLIPS BOULEVARD
    		STREET 2:		375 PHILLIPS BOULEVARD
    		CITY:			EWING
    		STATE:			NJ
    		ZIP:			08618
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    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>oled-defa14a_20210617.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: oled-defa14a_20210617.htm

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    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>gtltuny1kwre000002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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