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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="GUID-8C22AF20-EE0E-5AD2-BEFD-FED5A7DBB09B" xml:lang="en"><title>LCD Extension</title><shortdesc/><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>The LCD Extension is a kernel extension that manages the screen hardware.
This section describes how to create a port of it for your phone hardware. </p>
<p>The user-side interface to the LCD Extension is defined by the <codeph>EHalGroupDisplay</codeph> group
of HAL functions defined by the User-Side Hardware Abstraction (HAL). The
LCD Extension implements a handler for this group of functions. </p>
</conbody><related-links>
<link href="GUID-2D977A02-5928-5441-8AE7-42A722F2A4B8.dita#GUID-2D977A02-5928-5441-8AE7-42A722F2A4B8/GUID-4DA41221-40B9-5BC7-B2C6-7C6EB4522508">
<linktext>User-Side Hardware   Abstraction</linktext></link>
<link href="GUID-8DF46A11-874A-52E5-9298-C083EA633BA0.dita"><linktext>Implementing
Dynamic DSA Allocation</linktext></link>
</related-links></concept>