{"id":190474,"date":"2012-02-10T12:40:00","date_gmt":"2012-02-10T11:40:00","guid":{"rendered":"https:\/\/cms.galaxiemedia.fr\/tomshardware\/2012\/02\/10\/des-leds-flash-pour-les-smartphones\/"},"modified":"2023-06-22T19:18:34","modified_gmt":"2023-06-22T17:18:34","slug":"des-leds-flash-pour-les-smartphones","status":"publish","type":"post","link":"https:\/\/www.tomshardware.fr\/des-leds-flash-pour-les-smartphones\/","title":{"rendered":"Des LEDs \u00ab flash \u00bb pour les smartphones"},"content":{"rendered":"<p><span class=\"imgContent imgRight\"><span class=\"iZoom\"><img alt=\"Image 1 : Des LEDs \u00ab flash \u00bb pour les smartphones\" decoding=\"async\" width=\"200\" height=\"140\" src=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2012\/02\/stcf04-p3268big-200x140.jpg\" class=\"attachment-purch-200 size-purch-200\" alt=\"\" \/><\/span><\/span><\/p>\n<\/p>\n<p>Dans les <strong>smartphones<\/strong> et autres t\u00e9l\u00e9phones portables, le <strong>flash au x\u00e9non<\/strong> des appareils classiques et g\u00e9n\u00e9ralement remplac\u00e9 par une (ou plusieurs) LED, m\u00eame si quelques \u00ab photophones \u00bb ont utilis\u00e9 des flashs classiques. La raison est simple : les flashs au x\u00e9non ne sont pas aussi rapides que les <strong>LEDs<\/strong> mais surtout consomment beaucoup plus que ces derni\u00e8res. Mais les LEDs ont un d\u00e9faut : elles \u00e9clairent peu. Une LED classique utilis\u00e9e dans un smartphone produit l&#8217;\u00e9quivalent d&#8217;une <strong>ampoule de 2 W<\/strong>, ce qui est bien trop peu.<\/p>\n<\/p>\n<p><strong>ST Microelectonics<\/strong> vient d&#8217;annoncer une solution : la <strong>STCF04<\/strong>. Le syst\u00e8me utilise un <strong>supercondensateur<\/strong> et des LEDs de forte puissance pour d\u00e9charger l\u2019\u00e9nergie tr\u00e8s rapidement et la soci\u00e9t\u00e9 annonce que le \u00ab flash \u00bb peut atteindre l&#8217;efficacit\u00e9 d&#8217;une <strong>ampoule de 40 W<\/strong>, soit nettement plus que les mod\u00e8les classiques et l&#8217;\u00e9quivalent d&#8217;un flash au x\u00e9non d&#8217;appareil photo compact. La puce (qui vaut 2 $) est pr\u00e9vue pour les smartphones : en plus des fonctions de flash, elle peut aussi fonctionner en mode \u00ab lampe torche \u00bb et dispose de tout le n\u00e9cessaire pour \u00e9viter la surchauffe. Un capteur de luminosit\u00e9 est int\u00e9gr\u00e9 dans la puce pour r\u00e9gler finement la puissance de l&#8217;\u00e9clair et le syst\u00e8me permet m\u00eame d&#8217;effectuer des \u00ab pr\u00e9flash \u00bb pour \u00e9viter le ph\u00e9nom\u00e8ne des yeux rouges. <\/p>\n<\/p>\n<p>ST Microelectonics esp\u00e8re proposer son nouveau flash cette ann\u00e9e dans les smartphones.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans les smartphones et autres t\u00e9l\u00e9phones portables, le flash au x\u00e9non des appareils classiques et g\u00e9n\u00e9ralement remplac\u00e9 par une (ou plusieurs) LED, m\u00eame si quelques \u00ab photophones \u00bb ont utilis\u00e9 des flashs classiques.<\/p>","protected":false},"author":36,"featured_media":190475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[487,4107,4102,4079,4104],"tags":[],"hubs":[],"acf":{"post_show_excerpt":false,"post_source":{"title":"Tom's Hardware FR","url":"https:\/\/www.tomshardware.fr\/","target":""}},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Des LEDs \u00ab flash \u00bb pour les smartphones<\/title>\n<meta name=\"description\" content=\"Dans les smartphones et autres t\u00e9l\u00e9phones portables, le flash au x\u00e9non des appareils classiques et g\u00e9n\u00e9ralement remplac\u00e9 par une (ou plusieurs) LED, m\u00eame si quelques \u00ab photophones \u00bb ont utilis\u00e9 des flashs classiques.\" \/>\n<meta name=\"robots\" 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