{"id":101732,"date":"2019-06-06T10:07:48","date_gmt":"2019-06-06T08:07:48","guid":{"rendered":"http:\/\/riverdi.com\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/"},"modified":"2024-05-20T11:04:41","modified_gmt":"2024-05-20T09:04:41","slug":"dommages-causes-a-lecran-tft-et-comment-les-eviter","status":"publish","type":"post","link":"https:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter","title":{"rendered":"Dommages caus\u00e9s \u00e0 l&rsquo;\u00e9cran TFT et comment les \u00e9viter"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/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 of Content\"><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: #002175;color:#002175\" 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: #002175;color:#002175\" 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:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#La_structure_de_lecran_TFT\" >La structure de l&rsquo;\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:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#Comment_enqueter\" >Comment enqu\u00eater ?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#Endommagement_de_la_structure_des_cristaux_liquides\" >Endommagement de la structure des cristaux liquides<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#Endommagement_de_la_couche_de_transistors\" >Endommagement de la couche de transistors<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#Comment_eviter_dendommager_lecran_TFT\" >Comment \u00e9viter d&rsquo;endommager l&rsquo;\u00e9cran TFT ?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/riverdi.com\/fr\/blog\/dommages-causes-a-lecran-tft-et-comment-les-eviter\/#Dautres_types_de_dommages_pouvant_survenir_sur_les_ecrans_sont_causes_par_les_decharges_electrostatiquesESD\" >D&rsquo;autres types de dommages pouvant survenir sur les \u00e9crans sont caus\u00e9s par les d\u00e9charges \u00e9lectrostatiques(ESD).<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Cette semaine, dans la <a href=\"https:\/\/riverdi.com\/category\/display-101\">s\u00e9rie Display 101<\/a>, nous parlons des types de dommages qui peuvent survenir sur l&rsquo;\u00e9cran TFT et des moyens de les pr\u00e9venir.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"La_structure_de_lecran_TFT\"><\/span>La structure de l&rsquo;\u00e9cran TFT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pour en savoir plus sur les \u00e9crans LCD, il est n\u00e9cessaire de bien conna\u00eetre leur structure.<\/p>\n<p>Il est constitu\u00e9 de <strong>quatre \u00e9l\u00e9ments de base<\/strong> (Fig. 1) :<\/p>\n<ol>\n<li>source de lumi\u00e8re (r\u00e9tro\u00e9clairage),<\/li>\n<li>films de polarisation,<\/li>\n<li>\u00e9lectrodes,<\/li>\n<li>avec des cristaux liquides \u00e0 structure n\u00e9matique.<\/li>\n<\/ol>\n<p>La caract\u00e9ristique fondamentale des cristaux liquides est leur capacit\u00e9 \u00e0 se tordre \u00e0 45 ou 90 degr\u00e9s par rapport \u00e0 l&rsquo;axe des particules dispos\u00e9es parall\u00e8lement entre les deux surfaces des \u00e9lectrodes.<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Structure-of-TFT-display.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-7482 size-full\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Structure-of-TFT-display.jpg\" alt=\"\u00c9cran 101 Riverdi Structure de l'\u00e9cran LCD Image interne du poste\" width=\"1066\" height=\"664\"><\/a><\/p>\n<p style=\"text-align: center\"><em>Figure 1. Construction des \u00e9crans LCD<\/em><\/p>\n<p><span style=\"font-weight: 400\">Dans le LCD, la lumi\u00e8re passe par deux polariseurs, qui sont dispos\u00e9s perpendiculairement, puis par la couche de cristaux liquides. La couche peut bloquer la transition de la lumi\u00e8re ou modifier la polarisation. Enfin, la lumi\u00e8re tombe sur les filtres de couleur, qui lui donnent une couleur d\u00e9termin\u00e9e  <\/span><b>la cr\u00e9ation de l&rsquo;image.<\/b><\/p>\n<p><span style=\"font-weight: 400\">Les \u00e9crans LCD TFT sont constitu\u00e9s de transistors \u00e0 couche mince. Le transistor est produit par d\u00e9p\u00f4t chimique en phase vapeur (CVD), bas\u00e9 sur l&rsquo;utilisation d&rsquo;un m\u00e9lange d&rsquo;hydrog\u00e8ne liquide et de silicium dans un solvant organique, et en utilisant la m\u00e9thode d&rsquo;application par rotation du semi-conducteur mince.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Dans la matrice TFT, chaque pixel est contr\u00f4l\u00e9 par quatre transistors, dont l&rsquo;un est responsable de la luminosit\u00e9 et les trois autres de la couleur de base (rouge, bleu, vert). <\/span><b>l&rsquo;un d&rsquo;entre eux est responsable de la luminosit\u00e9, et les trois autres de la couleur de base (rouge, bleu, vert).<\/b><span style=\"font-weight: 400\">. Par cons\u00e9quent, cette solution permet d&rsquo;obtenir une haute r\u00e9solution, de meilleures couleurs et des param\u00e8tres g\u00e9n\u00e9ralement plus \u00e9lev\u00e9s pour les images affich\u00e9es, par rapport \u00e0 une matrice LCD classique.<\/span><\/p>\n<p><span style=\"font-weight: 400\">En raison du mat\u00e9riau \u00e0 partir duquel le TFT est construit, qui est du <\/span><b>verre<\/b><span style=\"font-weight: 400\">les \u00e9crans TFT ont <\/span><b>une faible r\u00e9sistance m\u00e9canique,<\/b><span style=\"font-weight: 400\"> et peuvent donc \u00eatre facilement endommag\u00e9s<\/span><span style=\"font-weight: 400\">. Les dommages les plus courants sont ceux caus\u00e9s par le TFT :<\/span><\/p>\n<ul>\n<li> <span style=\"font-weight: 400\"> violation de la structure des cristaux liquides &#8211; \u00ab\u00a0<\/span><i><br \/>\n  <span style=\"font-weight: 400\">d\u00e9versement de cristaux liquides<\/span><br \/>\n<\/i><span style=\"font-weight: 400\">\u00ab\u00a0,<\/span><\/li>\n<li><span style=\"font-weight: 400\">endommagement de la couche de transistors &#8211; \u00ab\u00a0<\/span><i><br \/>\n  <span style=\"font-weight: 400\">interruption des lignes ITO<\/span><br \/>\n<\/i><span style=\"font-weight: 400\">\u00ab\u00a0. <\/span> <\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Les deux d\u00e9fauts ci-dessus sont bas\u00e9s sur la fissuration de la base du verre, mais ils se caract\u00e9risent par des sympt\u00f4mes tr\u00e8s diff\u00e9rents.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comment_enqueter\"><\/span><b>Comment enqu\u00eater ?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Endommagement_de_la_structure_des_cristaux_liquides\"><\/span>Endommagement de la structure des cristaux liquides<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: left\"><span style=\"font-weight: 400\">Le d\u00e9sordre dans la structure des cristaux liquides appara\u00eet sous la forme d&rsquo;un \u00e9cran blanc avec des zones noires de forme al\u00e9atoire aux bords tranchants (Fig. 2). La zone noire est l&rsquo;endroit o\u00f9 les cristaux liquides ne transmettent pas la lumi\u00e8re.<\/span><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-2.-Defective-display-damage-of-the-liquid-crystal-structure.jpg\"><img decoding=\"async\" class=\"wp-image-7483 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-2.-Defective-display-damage-of-the-liquid-crystal-structure.jpg\" alt=\"Affichage 101 D\u00e9t\u00e9rioration de l'affichage de Riverdi sur l'\u00e9cran LCD\" width=\"606\" height=\"388\"><\/a><\/p>\n<p style=\"text-align: center\"><em>Figure 2. \u00c9cran d\u00e9fectueux &#8211; endommagement de la structure des cristaux liquides<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Endommagement_de_la_couche_de_transistors\"><\/span>Endommagement de la couche de transistors<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: left\">Les lignes horizontales sur l&rsquo;\u00e9cran (Fig. 3) peuvent indiquer une interruption des lignes ITO, qui contr\u00f4lent les transistors. Dans la plupart des cas, la ligne enti\u00e8re des transistors est interrompue, c&rsquo;est pourquoi les d\u00e9fauts sont observ\u00e9s en tant que ligne.<\/p>\n<p style=\"text-align: center\"><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-3.-Line-on-the-screen-caused-by-damage-of-the-ITO-lines-by-crack-of-the-TFT.png\"><img decoding=\"async\" class=\"wp-image-7484 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-3.-Line-on-the-screen-caused-by-damage-of-the-ITO-lines-by-crack-of-the-TFT.png\" alt=\"Affichage 101 Vue de la ligne Riverdi Image de la fissure des lignes ITO\" width=\"777\" height=\"506\"><\/a><br \/>\n<em>Figure 3. Les lignes sur l&rsquo;\u00e9cran caus\u00e9es par l&rsquo;interruption des lignes ITO par une fissure du TFT<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comment_eviter_dendommager_lecran_TFT\"><\/span>Comment \u00e9viter d&rsquo;endommager l&rsquo;\u00e9cran TFT ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>La plupart des dommages surviennent au cours du processus d&rsquo;assemblage dans les appareils de l&rsquo;utilisateur final. Une pression trop forte sur la construction fragile du TFT peut endommager la structure des cristaux liquides ou les lignes \u00e9lectriques.<\/p>\n<p>La force de compression \u00e9lev\u00e9e exerc\u00e9e sur le bo\u00eetier de l&rsquo;afficheur peut entra\u00eener l&rsquo;\u00e9crasement des coins (Fig. 4). En cons\u00e9quence, les lignes ITO sont interrompues.<\/p>\n<p><a href=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-4.-Crushed-display-corner-interrupt-of-the-electrical-lines.png\"><img decoding=\"async\" class=\"wp-image-7485 size-full aligncenter\" src=\"https:\/\/riverdi.com\/wp-content\/uploads\/2019\/06\/Figure-4.-Crushed-display-corner-interrupt-of-the-electrical-lines.png\" alt=\"Affichage 101 coin d'affichage \u00e9cras\u00e9\" width=\"853\" height=\"528\"><\/a><\/p>\n<p style=\"text-align: center\"><em>Figure 4. Coin d&rsquo;affichage \u00e9cras\u00e9 &#8211; interruption des lignes \u00e9lectriques<\/em><\/p>\n<p><span style=\"font-weight: 400\">Nous vous recommandons d&rsquo;\u00eatre toujours prudent pendant le processus d&rsquo;assemblage du module. Ce traitement sp\u00e9cial est n\u00e9cessaire pour prot\u00e9ger la matrice de l&rsquo;\u00e9cran contre les chocs et les pressions excessives.  <\/span><\/p>\n<p><span style=\"font-weight: 400\">Le module peut \u00eatre maintenu strictement par le bo\u00eetier, et il convient d&rsquo;\u00e9viter toute pouss\u00e9e inutile sur l&rsquo;\u00e9cran. Le d\u00e9montage du bo\u00eetier de l&rsquo;\u00e9cran n&rsquo;est pas recommand\u00e9, car ce processus est tr\u00e8s destructeur et, dans la plupart des cas, il vous laissera avec un TFT endommag\u00e9.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dautres_types_de_dommages_pouvant_survenir_sur_les_ecrans_sont_causes_par_les_decharges_electrostatiquesESD\"><\/span>D&rsquo;autres types de dommages pouvant survenir sur les \u00e9crans sont caus\u00e9s par les <em lang=\"en\">d\u00e9charges \u00e9lectrostatiques<\/em>(ESD).<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u00e9couvrez<strong> comment vous prot\u00e9ger des dommages caus\u00e9s par les d\u00e9charges \u00e9lectrostatiques (ESD<\/strong> ) dans cet <a href=\"https:\/\/riverdi.com\/fr\/blog\/comment-proteger-lecran-des-dommages-causes-par-les-decharges-electrostatiques-esd#\">article de blog<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cette semaine, dans la s\u00e9rie Display 101, nous parlons des types de dommages qui peuvent survenir sur l&rsquo;\u00e9cran TFT et des moyens de les pr\u00e9venir.<\/p>\n","protected":false},"author":19,"featured_media":100131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"categories":[1457],"tags":[4713,1405,4700,1400,657],"class_list":["post-101732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-affichage-101","tag-affichage-101-fr","tag-affichage-101-2","tag-ecran-fr","tag-ecran-2","tag-tft"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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