{"id":235,"date":"2016-04-27T14:36:57","date_gmt":"2016-04-27T21:36:57","guid":{"rendered":"https:\/\/www.crystalfontz.com\/blog\/?post_type=encyclopedia&#038;p=235"},"modified":"2018-09-26T17:35:28","modified_gmt":"2018-09-27T00:35:28","slug":"lcm","status":"publish","type":"encyclopedia","link":"https:\/\/www.crystalfontz.com\/blog\/glossary\/lcm\/","title":{"rendered":"LCM"},"content":{"rendered":"<p>LCM stands for Liquid Crystal Module or <a href=\"\/blog\/glossary\/lcd\/\">LCD Module<\/a>. An LCM consists of an <a href=\"https:\/\/www.crystalfontz.com\/blog\/glossary\/lcd\/\" target=\"_self\" title=\"LCD stands for Liquid Crystal Display. An LCD is composed of two pieces of glass with a thin layer of liquid crystals between the glass layers. When a voltage is applied to the glass, the orientation of the crystals can be changed. This change in the crystal's orientation (called polarization) will make either a dark&hellip;\" class=\"encyclopedia\">LCD<\/a> or &ldquo;LCD glass&rdquo; and a connected LCD controller IC. In the US, LCMs are commonly called LCDs, although this is strictly incorrect. An LCM typically also includes a <a href=\"https:\/\/www.crystalfontz.com\/blog\/glossary\/backlight\/\" target=\"_self\" title=\"A backlight is used behind the LCD glass to allow the LCM to be read in dark conditions. The vast majority of backlights are now LED. Historically there were also EL (electroluminescent) and CCFL (Cold Cathode Fluorescent Light) backlights, but as LED efficiency has increased and cost has decreased, EL and CCFL backlights have all&hellip;\" class=\"encyclopedia\">backlight<\/a>.<\/p>\n<h3>Detailed Definition<\/h3>\n<p class=\"p1\">Many LCMs have a PCB (printed circuit board) that functions as a mechanical chassis&nbsp;and connects the LCD controller IC to the LCD through zebras (conductive elastomeric strips). Mechanical tension holds the transparent conductors of the LCD against the zebra on one side and bare conductors of the PCB on the other, allowing signals from the LCD controller IC to travel to the LCD.<\/p>\n<p class=\"p1\">Mechanical tension holds the transparent conductors of the LCD against the zebra on one side and bare conductors of the PCB on the other, allowing signals from the LCD controller IC to travel to the LCD.<\/p>\n<figure id=\"attachment_236\" aria-describedby=\"caption-attachment-236\" style=\"width: 1000px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-236 size-full\" src=\"https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module.jpg\" alt=\"COB Construction LCD Module - www.crystalfontz.com\" width=\"1000\" height=\"523\" srcset=\"https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module.jpg 800w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module-250x131.jpg 250w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module-768x402.jpg 768w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module-700x366.jpg 700w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COB_Construction_LCD_Module-120x63.jpg 120w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\"><figcaption id=\"caption-attachment-236\" class=\"wp-caption-text\">COB Construction LCD Module<\/figcaption><\/figure>\n<p class=\"p1\">LCMs are not required to have a PCB or backlight. In what might be thought of as the simplest form of LCM, the LCD controller IC is mounted directly onto transparent conductors of the LCD glass using ACF (Anisotropic Conductive Film), with signals brought to the same glass through a <a href=\"https:\/\/www.crystalfontz.com\/blog\/glossary\/ffc\/\" target=\"_self\" title=\"FFC stands for flat flex cable, sometimes called ribbon cables. FFCs are cables that carry signals. This is in contrast with an FPC, which typically includes components or printed circuitry, thereby changing signals. FFCs are often connected between ZIF connectors on PCBs. It is important to ensure the pitch, number of pins, side of connection,&hellip;\" class=\"encyclopedia\">FFC<\/a>\/<a href=\"https:\/\/www.crystalfontz.com\/blog\/glossary\/fpc\/\" target=\"_self\" title=\"FPC stands for flexible printed circuit. An example of an FPC is the gold tail on most of our TFTs and touchscreens. FPCs commonly included components, in contrast with an FFC. FPCs are typically used with a ZIF connector to connect to a PCB. When looking for a compatible ZIF connector for a given FPC,&hellip;\" class=\"encyclopedia\">FPC<\/a> (Flat Flex Cable \/ Flexible Printed Circuit).<\/p>\n<figure id=\"attachment_237\" aria-describedby=\"caption-attachment-237\" style=\"width: 1000px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-237 size-full\" src=\"https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module.jpg\" alt=\"COG Construction LCD Module - www.crystalfontz.com\" width=\"1000\" height=\"484\" srcset=\"https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module.jpg 800w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module-250x121.jpg 250w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module-768x372.jpg 768w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module-700x339.jpg 700w, https:\/\/www.crystalfontz.com\/blog\/wp-content\/uploads\/COG_Construction_LCD_Module-120x58.jpg 120w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\"><figcaption id=\"caption-attachment-237\" class=\"wp-caption-text\">COG Construction LCD Module<\/figcaption><\/figure>\n<h3>Questions?<\/h3>\n<p>If you have any questions, please&nbsp;<a href=\"https:\/\/www.crystalfontz.com\/contact.php\">contact our knowledgeable and friendly support staff<\/a> by email, phone, or chat.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>LCM stands for Liquid Crystal Module or LCD Module. An LCM consists of an LCD or &#8220;LCD glass&#8221; and a connected LCD controller IC. In the US, LCMs are commonly called LCDs, although this is strictly incorrect. An LCM typically also includes a backlight. Detailed Definition Many LCMs have a PCB (printed circuit board) that [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"class_list":["post-235","encyclopedia","type-encyclopedia","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LCM - Crystalfontz LCD Glossary<\/title>\n<meta name=\"description\" content=\"LCM : LCM stands for Liquid Crystal Module or LCD Module. An LCM consists of an LCD or &quot;LCD glass&quot; and a connected LCD controller IC. In the US, LCMs are\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.crystalfontz.com\/blog\/glossary\/lcm\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Crystalfontz Glossary - LCM\" \/>\n<meta property=\"og:description\" content=\"LCM stands for Liquid Crystal Module or LCD Module. An LCM consists of an LCD or &quot;LCD glass&quot; and a connected LCD controller IC. In the US, LCMs are commonly called LCDs, although this is strictly incorrect. 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