<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2020-10-27T16:29:53.3932961+00:00 -->
<!-- Version            : 5.0.1.513 -->
<!-- Package ID         : 553d52b8fa2a45f58378f731d145c2be -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="oled_PercentageOfRevenueRecordedFromProvisionOfServices" name="PercentageOfRevenueRecordedFromProvisionOfServices" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="oled_UnbilledReceivablesNoncurrent" name="UnbilledReceivablesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="oled_ContractExpirationYear" name="ContractExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="oled_BacklogAssociatedWithCommittedPurchaseOrdersFromCustomers" name="BacklogAssociatedWithCommittedPurchaseOrdersFromCustomers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="oled_NetIncreaseDecreaseInDeferredRevenue" name="NetIncreaseDecreaseInDeferredRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="oled_UnbilledReceivablesIncreaseDecreaseNet" name="UnbilledReceivablesIncreaseDecreaseNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="oled_IncreaseDecreaseInUnbilledReceivablesAbstract" name="IncreaseDecreaseInUnbilledReceivablesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
