{"id":81221,"date":"2012-01-04T00:00:00","date_gmt":"2012-01-03T23:00:00","guid":{"rendered":"http:\/\/b.bati-journal.com\/un-plafond-qui-simule-le-ciel-et-ses-variations-lumineuses\/81221"},"modified":"2019-07-15T11:29:23","modified_gmt":"2019-07-15T09:29:23","slug":"un-plafond-qui-simule-le-ciel-et-ses-variations-lumineuses","status":"publish","type":"post","link":"https:\/\/batijournal.com\/index.php\/un-plafond-qui-simule-le-ciel-et-ses-variations-lumineuses\/81221\/","title":{"rendered":"Un plafond qui simule le ciel et ses variations lumineuses"},"content":{"rendered":"<p>Les chercheurs de l&rsquo;Institut Fraunhofer de Stuttgart ont cr\u00e9\u00e9 un plafond lumineux qui simule les conditions d&rsquo;\u00e9clairage du ciel et les variations de lumi\u00e8re dues au d\u00e9filement des nuages. Ils ont \u00e9tudi\u00e9 la lumi\u00e8re naturelle afin de savoir comment, et avec quelle rapidit\u00e9, le spectre lumineux changeait lorsque les nuages se d\u00e9pla\u00e7aient. Il ont alors fabriqu\u00e9 un plafond constitu\u00e9 de dalles de 50 par 50 cm qui comprenaient chacune une carte \u00e0 LED avec 288 diodes \u00e9lectroluminescentes. Ils ont fix\u00e9 un film diffuseur blanc \u00e0 30 cm en dessous pour \u00e9liminer la perception des points lumineux et cr\u00e9er un \u00e9clairage homog\u00e8ne. Afin d&rsquo;obtenir une palette de couleur compl\u00e8te, ils ont combin\u00e9 des LED rouge, bleu, vert et blanc, plus de 16 millions de teintes peuvent \u00eatre ainsi g\u00e9n\u00e9r\u00e9es. Les LED permettent de simuler des changements dynamiques d&rsquo;\u00e9clairage qui ne sont pas directement perceptibles \u00e0 l&rsquo;oeil nu. Un prototype de ce ciel virtuel a \u00e9t\u00e9 d\u00e9velopp\u00e9, il comprend un total de 34 560 diodes couvrant une surface de 34 m\u00e8tres carr\u00e9s. A pleine puissance, le ciel s&rsquo;allume avec une intensit\u00e9 de plus de 3000 lux, mais de 500 \u00e0 1000 lux sont suffisants pour cr\u00e9er un niveau confortable d&rsquo;\u00e9clairage. Actuellement, le co\u00fbt du ciel virtuel est de 1000 euros par m\u00e8tre carr\u00e9, il est appel\u00e9 \u00e0 baisser avec le d\u00e9veloppement de ce produit. Les chercheurs disposeront d&rsquo;un stand de d\u00e9monstration au salon CeBIT \u00e0 Hanovre du 6 au 10 mars 2012.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les chercheurs de l&rsquo;Institut Fraunhofer de Stuttgart ont cr\u00e9\u00e9 un plafond lumineux qui simule les conditions d&rsquo;\u00e9clairage du ciel et les variations de lumi\u00e8re dues au d\u00e9filement des nuages. Ils ont \u00e9tudi\u00e9 la lumi\u00e8re naturelle afin de savoir comment, et avec quelle rapidit\u00e9, le spectre lumineux changeait lorsque les nuages se d\u00e9pla\u00e7aient. Il ont alors [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":81222,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[6340],"tags":[],"class_list":["post-81221","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-architecture-conception"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Un plafond qui simule le ciel et ses variations lumineuses<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/batijournal.com\/index.php\/un-plafond-qui-simule-le-ciel-et-ses-variations-lumineuses\/81221\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un plafond qui simule le ciel et ses variations lumineuses\" \/>\n<meta property=\"og:description\" content=\"Les chercheurs de l&rsquo;Institut Fraunhofer de Stuttgart ont cr\u00e9\u00e9 un plafond lumineux qui simule les conditions d&rsquo;\u00e9clairage du ciel et les variations de lumi\u00e8re dues au d\u00e9filement des nuages. Ils ont \u00e9tudi\u00e9 la lumi\u00e8re naturelle afin de savoir comment, et avec quelle rapidit\u00e9, le spectre lumineux changeait lorsque les nuages se d\u00e9pla\u00e7aient. 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