<SEC-DOCUMENT>0001005284-20-000021.txt : 20200309
<SEC-HEADER>0001005284-20-000021.hdr.sgml : 20200309
<ACCEPTANCE-DATETIME>20200309160523
ACCESSION NUMBER:		0001005284-20-000021
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200305
FILED AS OF DATE:		20200309
DATE AS OF CHANGE:		20200309

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ABRAMSON STEVEN V
		CENTRAL INDEX KEY:			0001232980

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12031
		FILM NUMBER:		20697984

ISSUER:		

	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

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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    <periodOfReport>2020-03-05</periodOfReport>

    <issuer>
        <issuerCik>0001005284</issuerCik>
        <issuerName>UNIVERSAL DISPLAY CORP \PA\</issuerName>
        <issuerTradingSymbol>OLED</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001232980</rptOwnerCik>
            <rptOwnerName>ABRAMSON STEVEN V</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UNIVERSAL DISPLAY CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>375 PHILLIPS BLVD.</rptOwnerStreet2>
            <rptOwnerCity>EWING</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08618</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <securityTitle>
                <value>Common Stock</value>
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                <value>Common Stock</value>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Grantor Retained Annuity Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2020 of 831 shares of restricted stock previously granted to Mr. Abramson.</footnote>
        <footnote id="F2">These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2020 of 992 shares of restricted stock previously granted to Mr. Abramson.</footnote>
        <footnote id="F3">These units were granted to Mr. Abramson under the Company's Long Term Incentive Plan as part of his 2020 compensation and are subject to a time-based restriction, with one-third of the total unit amount vesting on each of March 6, 2021, 2022, and 2023.</footnote>
        <footnote id="F4">These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2020 of 1,359 shares of restricted stock previously granted to Mr. Abramson.</footnote>
        <footnote id="F5">These shares were granted to Mr. Abramson as performance units under the Company's Long Term Incentive Plan as part of his 2017 compensation and vested on March 7, 2020 subject to the satisfaction of certain performance conditions, which our Compensation Committee certified on February 13, 2020 as having occurred.</footnote>
        <footnote id="F6">These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2020 of 4,080 shares of restricted stock previously granted to Mr. Abramson.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Steven V. Abramson (by Mauro Premutico as power of attorney)</signatureName>
        <signatureDate>2020-03-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</DOCUMENT>
</SEC-DOCUMENT>
