{"id":31423,"date":"2026-09-20T08:42:09","date_gmt":"2026-09-20T08:42:09","guid":{"rendered":"https:\/\/jiclcd.com\/?p=31423"},"modified":"2026-09-20T08:42:11","modified_gmt":"2026-09-20T08:42:11","slug":"tft-display-construction-and-working","status":"publish","type":"post","link":"https:\/\/jiclcd.com\/fr\/tft-display-construction-and-working\/","title":{"rendered":"Structure et fonctionnement d'un \u00e9cran TFT"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/jiclcd.com\/fr\/tft-display-construction-and-working\/#Structure_of_a_TFT_Display\" >Structure d'un \u00e9cran TFT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jiclcd.com\/fr\/tft-display-construction-and-working\/#Working_Principle_of_a_TFT_Display\" >Principe de fonctionnement d'un \u00e9cran TFT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jiclcd.com\/fr\/tft-display-construction-and-working\/#Applications_of_TFT_Displays\" >Applications des \u00e9crans TFT<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Structure_of_a_TFT_Display\"><\/span>Structure d'un \u00e9cran TFT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La structure de base d'un <a href=\"https:\/\/jiclcd.com\/fr\/module-lcd-tft\/\" data-type=\"link\" data-id=\"https:\/\/jiclcd.com\/tft-lcd-module\/\">\u00c9cran TFT<\/a> se compose principalement d'un module de r\u00e9tro\u00e9clairage, d'un polariseur inf\u00e9rieur, d'un substrat TFT, d'une couche de cristaux liquides, d'un substrat de filtre couleur et d'un polariseur sup\u00e9rieur.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Module de r\u00e9tro\u00e9clairage : les cristaux liquides n'\u00e9mettent pas de lumi\u00e8re par eux-m\u00eames ; le module de r\u00e9tro\u00e9clairage fait office de \u201c source lumineuse \u201d derri\u00e8re l'\u00e9cran, fournissant un \u00e9clairage uniforme et suffisant pour permettre un affichage correct de l'image. Il d\u00e9termine la qualit\u00e9 d'affichage et a une incidence \u00e0 la fois sur le co\u00fbt et la consommation d'\u00e9nergie.<\/li>\n\n\n\n<li>Polariseur inf\u00e9rieur : il filtre la lumi\u00e8re naturelle chaotique \u00e9mise par le r\u00e9tro\u00e9clairage pour la transformer en lumi\u00e8re polaris\u00e9e lin\u00e9airement \u2014 oscillant dans une seule direction \u2014 avant de la transmettre \u00e0 la couche de cristaux liquides.<\/li>\n\n\n\n<li>Substrat TFT : sa fonction principale est de servir de \u201c couche de commande \u201d \u00e0 l'\u00e9cran, permettant de contr\u00f4ler chaque pixel de mani\u00e8re ind\u00e9pendante et pr\u00e9cise afin de produire une image nette et stable.<\/li>\n\n\n\n<li>Couche \u00e0 cristaux liquides : elle sert principalement d'interrupteur de lumi\u00e8re et de r\u00e9gulateur de niveaux de gris. Elle n'\u00e9met pas de lumi\u00e8re elle-m\u00eame ; elle utilise plut\u00f4t une tension \u00e9lectrique pour modifier l'alignement mol\u00e9culaire, contr\u00f4lant ainsi l'intensit\u00e9 du r\u00e9tro\u00e9clairage traversant chaque pixel afin de cr\u00e9er diff\u00e9rents niveaux de luminosit\u00e9 et d'obscurit\u00e9.<\/li>\n\n\n\n<li>Substrat de filtre couleur : sa fonction principale consiste \u00e0 d\u00e9composer la lumi\u00e8re blanche provenant du r\u00e9tro\u00e9clairage en trois couleurs primaires \u2014 le rouge, le vert et le bleu \u2014 puis \u00e0 les combiner selon les exigences des pixels afin de produire une image en couleur.<\/li>\n\n\n\n<li>Polariseur sup\u00e9rieur : g\u00e9n\u00e9ralement orient\u00e9 \u00e0 un angle de 90\u00b0 par rapport au polariseur inf\u00e9rieur ; il ne laisse passer que la lumi\u00e8re polaris\u00e9e dans sa propre direction tout en absorbant la lumi\u00e8re polaris\u00e9e dans d'autres directions, cr\u00e9ant ainsi un effet d\u201c\u201d obturateur de lumi\u00e8re \u00bb.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Working_Principle_of_a_TFT_Display\"><\/span>Principe de fonctionnement d'un \u00e9cran TFT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le fonctionnement d'un \u00e9cran TFT repose sur les propri\u00e9t\u00e9s optiques des cristaux liquides et sur le contr\u00f4le \u00e9lectrique assur\u00e9 par des transistors \u00e0 couche mince (TFT). Fondamentalement, des signaux \u00e9lectriques sont utilis\u00e9s pour contr\u00f4ler avec pr\u00e9cision l'alignement des mol\u00e9cules de cristaux liquides, modulant ainsi la quantit\u00e9 de lumi\u00e8re de fond qui les traverse afin de former, au final, une image en couleur \u00e0 l'\u00e9cran. Dans un \u00e9cran \u00e0 matrice active, chaque pixel est associ\u00e9 \u00e0 un transistor comprenant un condensateur, ce qui permet \u00e0 chaque sous-pixel de conserver sa charge \u00e9lectrique. Les \u00e9crans TFT-LCD int\u00e8grent un transistor \u00e0 couche mince (TFT) ind\u00e9pendant \u00e0 chaque emplacement de pixel ; ce transistor agit comme un interrupteur miniature, contr\u00f4lant avec pr\u00e9cision la tension appliqu\u00e9e aux mol\u00e9cules de cristaux liquides au sein de ce pixel. Son principe de fonctionnement repose sur le fait que les mol\u00e9cules de cristaux liquides font pivoter la direction de polarisation de la lumi\u00e8re pour permettre la transmission (cr\u00e9ant un \u201c \u00e9tat clair \u201d) dans l\u2019\u00e9tat initial, tandis qu\u2019elles se tordent pour bloquer la transmission de la lumi\u00e8re (cr\u00e9ant un \u201c \u00e9tat sombre \u201d) lors de l\u2019application d\u2019un champ \u00e9lectrique ; le contr\u00f4le de l\u2019\u00e9chelle de gris est obtenu en r\u00e9gulant avec pr\u00e9cision la tension appliqu\u00e9e \u00e0 chaque sous-pixel. L\u2019affichage en couleur repose sur un trio de sous-pixels adjacents rouge (R), vert (G) et bleu (B), associ\u00e9s \u00e0 un filtre de couleur superpos\u00e9, qui m\u00e9lange les couleurs en contr\u00f4lant ind\u00e9pendamment les niveaux de gris de ces trois sous-pixels. Les transistors \u00e0 couche mince (TFT) remplissent deux fonctions principales : la commande de commutation \u2014 r\u00e9gulant la commutation et l\u2019entr\u00e9e de donn\u00e9es pour chaque TFT via un r\u00e9seau matriciel de lignes de balayage horizontales et de lignes de donn\u00e9es verticales \u2014 et la r\u00e9tention de tension, o\u00f9 un condensateur de stockage maintient temporairement la tension lorsque le TFT est d\u00e9sactiv\u00e9 afin d\u2019assurer la stabilit\u00e9 des mol\u00e9cules de cristal liquide.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applications_of_TFT_Displays\"><\/span>Applications des \u00e9crans TFT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Les \u00e9crans TFT offrent des avantages consid\u00e9rables <a href=\"https:\/\/jiclcd.com\/fr\/tft-display-pros-and-cons\/\" data-type=\"link\" data-id=\"https:\/\/jiclcd.com\/tft-display-pros-and-cons\/\">avantages<\/a> en mati\u00e8re de reproduction des couleurs et sont largement utilis\u00e9s dans divers secteurs, notamment les syst\u00e8mes domotiques, l'\u00e9lectrom\u00e9nager, les \u00e9quipements de contr\u00f4le industriel, l'Internet industriel, les \u00e9crans automobiles, les dispositifs m\u00e9dicaux, les \u00e9quipements de plein air, la robotique intelligente, l'\u00e9lectronique grand public et les appareils portables intelligents.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/jiclcd.com\/wp-content\/uploads\/2026\/04\/TFT-59-1.png.webp\" alt=\"\"\/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Structure of a TFT Display The core structure of a TFT display consists primarily of a backlight module, a bottom polarizer, a TFT substrate, a liquid crystal layer, a color filter substrate, and a top polarizer. Working Principle of a TFT Display The operation of a TFT display relies on the optical properties of liquid [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":26405,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[],"class_list":["post-31423","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tft-lcd"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>tft display construction and working - Jictech<\/title>\n<meta name=\"description\" content=\"The core structure of a TFT display consists primarily of a backlight module, a bottom polarizer, a TFT substrate, a liquid crystal layer, a color filter substrate, and a top polarizer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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