{"id":988,"date":"2019-12-04T13:15:52","date_gmt":"2019-12-04T12:15:52","guid":{"rendered":"https:\/\/blog.exasoft.cz\/?p=988"},"modified":"2019-12-04T15:08:34","modified_gmt":"2019-12-04T14:08:34","slug":"vypalovani-oled-displeju-fama-nebo-skutecnost","status":"publish","type":"post","link":"https:\/\/blog.exasoft.cz\/index.php\/vypalovani-oled-displeju-fama-nebo-skutecnost\/","title":{"rendered":"Vypalov\u00e1n\u00ed OLED displej\u016f \u2013 f\u00e1ma, nebo skute\u010dnost?"},"content":{"rendered":"\n<p>OLED displeje se doslova st\u00e1vaj\u00ed hitem v&nbsp;modern\u00ed elektrotechnice.\nObjevuje se st\u00e1le v\u00edce chytr\u00fdch telefon\u016f, hodinek a televizor\u016f s&nbsp;t\u011bmito zobrazova\u010di.\nJak je to ale s&nbsp;jejich \u017eivotnost\u00ed?<\/p>\n\n\n\n<p><strong>Jak to\nfunguje?<\/strong><\/p>\n\n\n\n<p>Na za\u010d\u00e1tek by bylo dobr\u00e9 zrekapitulovat, jak to vlastn\u011b funguje.<\/p>\n\n\n\n<p>OLED, cel\u00fdm n\u00e1zvem&nbsp;<strong>Organic light-emitting diode<\/strong>, vyu\u017e\u00edv\u00e1 syst\u00e9m, kter\u00fd je tvo\u0159en z&nbsp;<strong>organick\u00fdch sv\u011bteln\u00fdch bod\u016f<\/strong>. Ka\u017ed\u00fd z&nbsp;nich produkuje <strong>vlastn\u00ed sv\u011btlo<\/strong>. Miliony sv\u011bteln\u00fdch bod\u016f pak vytv\u00e1\u0159\u00ed mozaiku barev, kterou pak lidsk\u00e9 o\u010di vn\u00edmaj\u00ed jako kompletn\u00ed obraz. Hlavn\u00ed v\u00fdhodou t\u00e9to technologie jsou <strong>v\u011brn\u00e9 a pln\u00e9 barvy<\/strong> spolu s&nbsp;mo\u017enost\u00ed zten\u010den\u00ed samotn\u00e9 obrazovky na neuv\u011b\u0159iteln\u011b tenou\u010dkou placku. Velk\u00fdm plusem, kter\u00e9mu se nedok\u00e1zala zat\u00edm p\u0159ibl\u00ed\u017eit \u017e\u00e1dn\u00e1 dal\u0161\u00ed technologie, je naprosto <strong>dokonal\u00e9 zobrazen\u00ed \u010dern\u00e9 barvy<\/strong>, kdy v&nbsp;dan\u00fd moment jsou sv\u011bteln\u00e9 body zhasnut\u00e9 a neprodukuj\u00ed \u017e\u00e1dn\u00e9 ru\u0161iv\u00e9 sv\u011btlo.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/azcd.harveynorman.com.au\/media\/catalog\/product\/l\/g\/lg-b8-stb-4k-uhd-oled-ai-thinq-smart-tv-left_1.jpg\" alt=\"V\u00fdsledek obr\u00e1zku pro oled tv\"\/><\/figure>\n\n\n\n<p><strong>M\u00e1 to v\u016fbec n\u011bjak\u00e1 negativa?<\/strong><\/p>\n\n\n\n<p>Ano, m\u00e1, neexistuje dokonal\u00e9 \u0159e\u0161en\u00ed, v\u0161e m\u00e1 sv\u00e9 mouchy. V&nbsp;p\u0159\u00edpad\u011b OLED obrazovek je hlavn\u00edm probl\u00e9mem tzv. \u201e<strong>vypalov\u00e1n\u00ed obrazu<\/strong>\u201c. V\u0161imli jste si, \u017ee nap\u0159. PC monitory nejsou nikdy vybaveny obrazovkou OLED? M\u00e1 to jednoduch\u00fd d\u016fvod. Pokud je na OLED dlouhou dobu zobrazen statick\u00fd nem\u011bnn\u00fd obsah, dojde k&nbsp;lidov\u011b \u0159e\u010deno \u201e\u00fanav\u011b\u201c jednotliv\u00fdch pixel\u016f, kter\u00e9 n\u00e1sledn\u011b ztr\u00e1cej\u00ed jas a na obrazovce jdou d\u00edky tomu <strong>vid\u011bt mapy<\/strong>, \u010d\u00edm\u017e je obraz znehodnocen. U monitor\u016f je riziko nem\u011bnn\u00e9ho obrazu docela vysok\u00e9, proto se zde tato technologie nehod\u00ed. Televize tento probl\u00e9m \u0159e\u0161\u00ed mnoha <strong>ochrann\u00fdmi syst\u00e9my<\/strong>. V\u011bd\u011bli jste, \u017ee obraz na OLED obrazovk\u00e1ch se neust\u00e1le lehce pohybuje tak, aby nedoch\u00e1zelo k&nbsp;tomu, \u017ee jednotliv\u00e9 body budou st\u00e1le sv\u00edtit stejn\u011b? Nav\u00edc v&nbsp;p\u0159\u00edpad\u011b del\u0161\u00ed ne\u010dinnosti se automaticky zap\u00edn\u00e1 <strong>spo\u0159i\u010d obrazovky<\/strong>, kdy jsou body vypnuty. Z\u00e1rove\u0148 funguje automatizovan\u00fd mechanismus, kdy po ka\u017ed\u00e9m vypnut\u00ed televize prob\u00edh\u00e1 n\u011bco jako zrychlen\u00e9 \u201e<strong>\u010di\u0161t\u011bn\u00ed obrazovky<\/strong>\u201c, p\u0159i kter\u00e9m jsou jednotliv\u00e9 body regenerov\u00e1ny. Po del\u0161\u00edm \u010dasov\u00e9m intervalu pak doch\u00e1z\u00ed k&nbsp;hloubkov\u00e9mu \u010di\u0161t\u011bn\u00ed, kter\u00e9 m\u016f\u017ee trvat i v\u00edce ne\u017e hodinu. I proto se d\u016frazn\u011b nedoporu\u010duje vyp\u00edn\u00e1n\u00ed OLED televiz\u00ed z&nbsp;elektrick\u00e9 z\u00e1suvky.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.pinimg.com\/originals\/c6\/66\/a9\/c666a9fff006e4fd4316c067d5d452aa.jpg\" alt=\"V\u00fdsledek obr\u00e1zku pro oled tv thin\"\/><\/figure>\n\n\n\n<p><strong>Vyp\u00e1l\u00ed se nebo ne?<\/strong><\/p>\n\n\n\n<p>Z&nbsp;vlastn\u00edch zku\u0161enost\u00ed, kdy\njsem se za posledn\u00ed p\u016flrok setkal se t\u0159emi za\u0159\u00edzen\u00edmi s&nbsp;vyp\u00e1lenou OLED\nobrazovkou, mohu \u0159\u00edci, \u017ee za ur\u010dit\u00fdch <strong>extr\u00e9mn\u00edch\npodm\u00ednek<\/strong> k&nbsp;tomu m\u016f\u017ee doj\u00edt. Prvn\u00edm takto po\u0161kozen\u00fdm p\u0159\u00edstrojem byl\ntelefon Huawei, kter\u00fd byl vystaven na prodejn\u011b a do\u0161lo k&nbsp;tomu, \u017ee v&nbsp;p\u0159edv\u00e1d\u011bc\u00edm\nre\u017eimu vysko\u010dilo ok\u00e9nko s&nbsp;varovnou hl\u00e1\u0161kou. To na displeji sv\u00edtilo n\u011bkolik\ndn\u00ed. N\u00e1sledn\u011b po restartu telefonu z\u016fstalo v&nbsp;displeji pr\u00e1v\u011b toto ok\u00e9nko\nz\u0159eteln\u011b vyp\u00e1leno a byla nutn\u00e1 v\u00fdm\u011bna cel\u00e9ho OLED panelu. <\/p>\n\n\n\n<p>Podobnou zku\u0161enost m\u00e1m i s&nbsp;vystavenou\n<strong>OLED TV<\/strong>, na kter\u00e9 b\u011b\u017eel pravideln\u011b\nn\u011bkolik m\u011bs\u00edc\u016f v&nbsp;kuse demo m\u00f3d, kter\u00fd ve smy\u010dce zobrazoval stejn\u00fd obsah.\nAsi by se nic nestalo, kdyby po vypnut\u00ed televize nedo\u0161lo tak\u00e9 k&nbsp;p\u0159eru\u0161en\u00ed dod\u00e1vky\nelektrick\u00e9 energie, co\u017e m\u011blo za n\u00e1sledek to, \u017ee n\u011bkolikr\u00e1t po sob\u011b nedo\u0161lo k \u201e\u010di\u0161t\u011bn\u00ed\u201c\nzobrazovac\u00edch pixel\u016f. V\u00fdsledkem byly viditeln\u00e9 mapy, kter\u00fdch se ji\u017e ne\u0161lo\nzbavit.<\/p>\n\n\n\n<p>T\u0159et\u00edm p\u0159\u00edpadem byl op\u011bt telefon, tentokr\u00e1te Samsung Galaxy S8, u kter\u00e9ho p\u0159i uveden\u00ed do tov\u00e1rn\u00edho nastaven\u00ed a modr\u00e9 obrazovce byly z\u0159eteln\u011b vyp\u00e1len\u00e9 n\u011bkter\u00e9 ze st\u00e1le zobrazen\u00fdch prvk\u016f \u2013 horn\u00ed li\u0161ta a spodn\u00ed ovl\u00e1dac\u00ed Android prvky. K&nbsp;tomuto po\u0161kozen\u00ed do\u0161lo po jednom roce pou\u017e\u00edv\u00e1n\u00ed a zde, jako v&nbsp;jedin\u00e9m ze t\u0159\u00ed zm\u00edn\u011bn\u00fdch p\u0159\u00edpad\u016f, se tak stalo za standardn\u00edho pou\u017e\u00edv\u00e1n\u00ed vlivem vady displeje.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.techadvisor.co.uk\/cmsdata\/features\/3682483\/ips-vs-oled-phone-screens_thumb800.jpg\" alt=\"V\u00fdsledek obr\u00e1zku pro smartphone oled\"\/><\/figure>\n\n\n\n<p><strong>Co \u0159\u00edci z\u00e1v\u011brem?<\/strong><\/p>\n\n\n\n<p>Modern\u00ed OLED displeje jsou proti vyp\u00e1len\u00ed za b\u011b\u017en\u00e9ho pou\u017e\u00edv\u00e1n\u00ed <strong>dostate\u010dn\u011b chr\u00e1n\u011bny<\/strong>. Jsou ale mnohem <strong>n\u00e1chyln\u011bj\u0161\u00ed na po\u0161kozen\u00ed<\/strong> ne\u017e klasick\u00e9 LED \u010di vylep\u0161en\u00e9 QLED, NanoCell, PLED atd. V\u00a0ur\u010dit\u00fdch nestandardn\u00edch situac\u00edch a extr\u00e9mn\u00edch podm\u00ednk\u00e1ch m\u016f\u017ee doj\u00edt k\u00a0jejich nevratn\u00e9mu po\u0161kozen\u00ed. Pokud v\u0161ak nem\u00e1te v\u00a0pl\u00e1nu zobrazovat dlouhodob\u011b stejn\u00fd a statick\u00fd obsah, nen\u00ed se \u010deho b\u00e1t a barevn\u00e9 pod\u00e1n\u00ed s\u00a0dokonalou \u010dernou za to rozhodn\u011b stoj\u00ed. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>OLED displeje se doslova st\u00e1vaj\u00ed hitem v&nbsp;modern\u00ed elektrotechnice. Objevuje se st\u00e1le v\u00edce chytr\u00fdch telefon\u016f, hodinek a televizor\u016f s&nbsp;t\u011bmito zobrazova\u010di. Jak je to ale s&nbsp;jejich \u017eivotnost\u00ed? Jak to funguje? Na za\u010d\u00e1tek by bylo dobr\u00e9 zrekapitulovat, jak to vlastn\u011b funguje. OLED, cel\u00fdm n\u00e1zvem&nbsp;Organic light-emitting diode, vyu\u017e\u00edv\u00e1 syst\u00e9m, kter\u00fd je tvo\u0159en z&nbsp;organick\u00fdch sv\u011bteln\u00fdch bod\u016f. Ka\u017ed\u00fd z&nbsp;nich produkuje vlastn\u00ed [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":993,"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":[19],"tags":[],"class_list":["post-988","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-prakticke-tipy","et-has-post-format-content","et_post_format-et-post-format-standard"],"_links":{"self":[{"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/posts\/988"}],"collection":[{"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/comments?post=988"}],"version-history":[{"count":3,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/posts\/988\/revisions"}],"predecessor-version":[{"id":992,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/posts\/988\/revisions\/992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/media\/993"}],"wp:attachment":[{"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/media?parent=988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/categories?post=988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.exasoft.cz\/index.php\/wp-json\/wp\/v2\/tags?post=988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}