{"id":11782,"date":"2024-09-18T22:55:42","date_gmt":"2024-09-18T19:55:42","guid":{"rendered":"https:\/\/global.tab-tv.com\/sk\/?p=11782"},"modified":"2024-09-18T22:55:44","modified_gmt":"2024-09-18T19:55:44","slug":"co-je-to-kontrast-v-televizore-vysvetlenie","status":"publish","type":"post","link":"https:\/\/global.tab-tv.com\/sk\/co-je-to-kontrast-v-televizore-vysvetlenie\/","title":{"rendered":"\u010co je to kontrast v telev\u00edzore, vysvetlenie"},"content":{"rendered":"\n
Kontrast telev\u00edzora je parameter, ktor\u00fd sa \u010dasto spom\u00edna pri diskusii o kvalite obrazu, ale \u010do vlastne znamen\u00e1? Jednoducho povedan\u00e9, kontrast predstavuje rozdiel medzi najjasnej\u0161\u00edmi a najtmav\u0161\u00edmi \u010das\u0165ami obrazu, ktor\u00e9 obrazovka dok\u00e1\u017ee zobrazi\u0165. Meria, ako dobre telev\u00edzor dok\u00e1\u017ee uk\u00e1za\u0165 svetl\u00e9 a tmav\u00e9 odtiene. Napr\u00edklad kontrast 1000:1 znamen\u00e1, \u017ee najjasnej\u0161ie biele miesto na obrazovke je 1000-kr\u00e1t jasnej\u0161ie ako najtmav\u0161ie \u010dierne. Tento parameter zohr\u00e1va d\u00f4le\u017eit\u00fa \u00falohu pri vytv\u00e1ran\u00ed h\u013abky, jasnosti a celkov\u00e9ho vizu\u00e1lneho z\u00e1\u017eitku pri sledovan\u00ed. Vy\u0161\u0161\u00ed kontrast znamen\u00e1 jasnej\u0161\u00ed a realistickej\u0161\u00ed obraz, \u010do rob\u00ed sledovanie pr\u00edjemnej\u0161\u00edm.<\/p>\n\n\n\n
Av\u0161ak v\u00fdrobcovia<\/strong> \u010dasto manipuluj\u00fa s t\u00fdmto parametrom, aby ich produkty vyzerali atrakt\u00edvnej\u0161ie. Aby ste sa vyhli tak\u00fdmto marketingov\u00fdm trik\u00e1m, je d\u00f4le\u017eit\u00e9 pochopi\u0165, \u010do je kontrast a ako ovplyv\u0148uje kvalitu obrazu.<\/p>\n\n\n\n
Kontrast telev\u00edzora je rozdiel medzi najjasnej\u0161\u00edmi a najtmav\u0161\u00edmi \u010das\u0165ami, ktor\u00e9 obrazovka dok\u00e1\u017ee zobrazi\u0165. Tento parameter je d\u00f4le\u017eit\u00fd, preto\u017ee ovplyv\u0148uje jasnos\u0165 a detaily obrazu. Napr\u00edklad, v no\u010dnej sc\u00e9ne mesta dok\u00e1\u017ee telev\u00edzor s dobrou kontrastnos\u0165ou zobrazi\u0165 tmav\u00e9 nebo a z\u00e1rove\u0148 zv\u00fdrazni\u0165 najmen\u0161ie detaily mestsk\u00fdch svetiel. Nedostato\u010dn\u00fd kontrast povedie k menej \u017eiv\u00e9mu a detailn\u00e9mu obrazu.<\/p>\n\n\n\n
Dva hlavn\u00e9 typy kontrastu<\/strong><\/h2>\n\n\n\n
Existuj\u00fa dva typy kontrastu: statick\u00fd a dynamick\u00fd.<\/p>\n\n\n\n
Statick\u00fd kontrast<\/strong> meria rozdiel medzi najjasnej\u0161ou \u010das\u0165ou obrazovky a najtmav\u0161ou \u010diernou \u010das\u0165ou obrazovky, ktor\u00e9 telev\u00edzor dok\u00e1\u017ee zobrazi\u0165 s\u00fa\u010dasne. Toto poskytuje predstavu o re\u00e1lnych mo\u017enostiach obrazovky v r\u00e1mci jedn\u00e9ho sn\u00edmku.<\/p>\n\n\n\n
Dynamick\u00fd kontrast<\/strong> ukazuje rozdiel medzi najjasnej\u0161ou a najtmav\u0161ou oblas\u0165ou na obrazovke, ale v r\u00f4znych \u010dasoch. Napr\u00edklad, pri zobrazovan\u00ed tmav\u00fdch sc\u00e9n mo\u017eno zn\u00ed\u017ei\u0165 jas a podsvietenie pre zlep\u0161enie \u010diernych odtie\u0148ov a naopak \u2013 zv\u00fd\u0161i\u0165 ich pri jasn\u00fdch sc\u00e9nach. Tieto manipul\u00e1cie umo\u017e\u0148uj\u00fa dosiahnu\u0165 obrovsk\u00e9 hodnoty ako 1 000 000:1.<\/p>\n\n\n\n
Statick\u00fd kontrast<\/strong><\/h3>\n\n\n\n
Statick\u00fd (alebo \u201enativn\u00fd\u201c) kontrast meria rozdiel medzi najjasnej\u0161\u00edmi a najtmav\u0161\u00edmi \u010das\u0165ami obrazovky, ktor\u00e9 s\u00fa zobrazen\u00e9 s\u00fa\u010dasne. T\u00e1to hodnota presnej\u0161ie odr\u00e1\u017ea skuto\u010dn\u00fa kvalitu obrazu.<\/p>\n\n\n\n
Predstavte si sc\u00e9nu, kde rytier stoj\u00ed na pozad\u00ed jasn\u00e9ho slne\u010dn\u00e9ho svetla a za n\u00edm je tmav\u00fd les. Dobr\u00fd statick\u00fd kontrast umo\u017en\u00ed jasne vidie\u0165 ako leskn\u00face sa brnenie, tak aj detaily lesa. \u0160tandardn\u00e9 hodnoty statick\u00e9ho kontrastu sa pohybuj\u00fa od 1000:1 do 5000:1. \u010c\u00edm vy\u0161\u0161ie je toto \u010d\u00edslo, t\u00fdm jasnej\u0161\u00ed a detailnej\u0161\u00ed je obraz na obrazovke. Na meranie statick\u00e9ho alebo typick\u00e9ho kontrastu sa pou\u017e\u00edva \u0161peci\u00e1lna \u0161abl\u00f3na pozost\u00e1vaj\u00faca z \u010diernych a bielych \u0161tvorcov na hodnotenie rozdielu v jasnosti. Biely \u0161tvorce na obrazovke s\u00fa nastaven\u00e9 na ur\u010dit\u00fa \u00farove\u0148 jasnosti (zvy\u010dajne okolo 100 kd\/m\u00b2). Potom sa meria jas \u010diernych \u0161tvorcov a na z\u00e1klade t\u00fdchto \u00fadajov sa vypo\u010d\u00edta priemern\u00fd kontrast.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Dynamick\u00fd kontrast<\/strong><\/h3>\n\n\n\n
Dynamick\u00fd kontrast meria rozdiel v jasnosti medzi najtmav\u0161\u00edmi a najjasnej\u0161\u00edmi \u010das\u0165ami obrazu zobrazovan\u00fdmi v r\u00f4znych \u010dasoch. Tento parameter neodr\u00e1\u017ea re\u00e1lny kontrast v jednom sn\u00edmku, preto\u017ee dynamick\u00fd kontrast sa men\u00ed v\u010faka \u00faprave nastaven\u00ed podsvietenia alebo in\u00fdch parametrov displeja. Jednoducho povedan\u00e9, pri meran\u00ed dynamick\u00e9ho kontrastu sa prv\u00e9 meranie (tmav\u00e9 \u0161tvorce) vykon\u00e1va pri minim\u00e1lnych hodnot\u00e1ch jasnosti, kontrastu a podsvietenia. Druh\u00e9 meranie jasn\u00fdch \u0161tvorcov sa vykon\u00e1va pri maxim\u00e1lnych hodnot\u00e1ch nastaven\u00ed. V d\u00f4sledku toho dost\u00e1vame obrovsk\u00e9 \u010d\u00edsla, ktor\u00e9 v skuto\u010dnosti nezodpovedaj\u00fa realite, ale p\u00f4sobia p\u00f4sobivo pre marketing.<\/p>\n\n\n\n
QLED vs OLED: Ktor\u00e9 je lep\u0161ie?<\/strong><\/h2>\n\n\n\n
QLED telev\u00edzory<\/strong> pou\u017e\u00edvaj\u00fa kvantov\u00e9 bodky na vytv\u00e1ranie jasn\u00fdch farieb, zatia\u013e \u010do OLED telev\u00edzory<\/strong> m\u00f4\u017eu \u00faplne vypn\u00fa\u0165 jednotliv\u00e9 pixely, \u010d\u00edm vytv\u00e1raj\u00fa hlbok\u00e9 \u010dierne odtiene. OLED poskytuje hlb\u0161\u00ed kontrast, zatia\u013e \u010do QLED m\u00f4\u017ee pon\u00faknu\u0165 jasn\u00fd obraz, \u010do je obzvl\u00e1\u0161\u0165 u\u017eito\u010dn\u00e9 v jasn\u00fdch miestnostiach. Probl\u00e9m OLED je zn\u00e1my \u2013 n\u00edzka jasnos\u0165, hoci posledn\u00e9 modely telev\u00edzorov tento probl\u00e9m vyrie\u0161ili. LG<\/strong> vydala OLED EVO, ktor\u00fd m\u00e1 mini zrkadl\u00e1 na zv\u00fd\u0161enie sveteln\u00e9ho toku, a Samsung<\/strong> QD OLED s\u00e1m o sebe m\u00e1 jasnej\u0161ie LED di\u00f3dy v\u010faka ve\u013ekosti a \u0161pecifickej \u0161trukt\u00fare.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Ak preferujete sledovanie telev\u00edzie v tmavej miestnosti, OLED bude lep\u0161ou vo\u013ebou kv\u00f4li svojej schopnosti zobrazova\u0165 \u010dierne odtiene. V jasne osvetlenej miestnosti sa QLED m\u00f4\u017ee zda\u0165 v\u00fdhodnej\u0161\u00ed kv\u00f4li svojej vysokej jasnosti.<\/p>\n\n\n\n
Vplyv r\u00f4znych faktorov na kontrast<\/strong><\/h2>\n\n\n\n
Technol\u00f3gia v\u00fdroby<\/strong>: Typy LCD panelov tie\u017e ovplyv\u0148uj\u00fa kontrast. Panely VA zvy\u010dajne poskytuj\u00fa vy\u0161\u0161\u00ed kontrast (a\u017e 3000:1 a viac), ale menia farbu pri bo\u010dnom poh\u013eade. IPS a TN panely, ktor\u00e9 maj\u00fa zvy\u010dajne kontrast okolo 1000:1, maj\u00fa v\u00e4\u010d\u0161iu jasnos\u0165, ale slab\u0161\u00ed kontrast. OLED panely pon\u00fakaj\u00fa dobr\u00fd kontrast a s\u00fa najkvalitnej\u0161ie na zobrazovanie obrazu.<\/p>\n\n\n\n
Vplyv in\u00fdch parametrov<\/strong>: Kontrast je \u00fazko spojen\u00fd s \u010fal\u0161\u00edmi parametrami displeja: jasnos\u0165ou a podsvieten\u00edm obrazovky. \u00daprava jasnosti m\u00f4\u017ee v\u00fdrazne ovplyvni\u0165 vn\u00edmanie kontrastu. Pr\u00edli\u0161 vysok\u00e1 jasnos\u0165 m\u00f4\u017ee vies\u0165 k \u201evyblednutiu\u201c \u010diernych odtie\u0148ov, zatia\u013e \u010do pr\u00edli\u0161 n\u00edzka jasnos\u0165 m\u00f4\u017ee sp\u00f4sobi\u0165 stmavovanie detailov. Celkov\u00e9 podsvietenie zvy\u0161uje celkov\u00fa jasnos\u0165 displeja, hoci priamo neovplyv\u0148uje parametre kontrastu, ale nepriamo ovplyv\u0148uje, preto\u017ee pri zv\u00fd\u0161en\u00ed podsvietenia je potrebn\u00e9 nastavi\u0165 ni\u017e\u0161iu jasnos\u0165.<\/p>\n\n\n\n
Lok\u00e1lne stmavovanie<\/strong>: Lok\u00e1lne stmavovanie je funkcia, ktor\u00e1 automaticky men\u00ed jas ur\u010dit\u00fdch \u010dast\u00ed obrazovky v z\u00e1vislosti od obsahu sc\u00e9ny. T\u00e1to technol\u00f3gia pom\u00e1ha zlep\u0161i\u0165 kontrast, najm\u00e4 v tmav\u00fdch sc\u00e9nach, ale je dostupn\u00e1 len na pr\u00e9miov\u00fdch displejoch.<\/p>\n\n\n\n
Kontrast a HDR<\/strong>: HDR (High Dynamic Range) zosil\u0148uje kontrast t\u00fdm, \u017ee umo\u017e\u0148uje zobrazovanie ako hlbok\u00fdch \u010diernych, tak jasn\u00fdch bielych bodov na jednom a tom istom obrazovke. Pre pln\u00e9 vyu\u017eitie potenci\u00e1lu HDR je d\u00f4le\u017eit\u00e9, aby displej mal vysok\u00fd kontrast. HDR umo\u017e\u0148uje zobrazenie videa s r\u00f4znymi \u00farov\u0148ami expoz\u00edcie v jednej sn\u00edmke, pri\u010dom \u0161tandardn\u00e9 video m\u00e1 metad\u00e1ta, ktor\u00e9 menia parametre videa pre lep\u0161iu kvalitu obrazu.<\/p>\n","protected":false},"excerpt":{"rendered":"
Kontrast telev\u00edzora je parameter, ktor\u00fd sa \u010dasto spom\u00edna pri diskusii o kvalite obrazu, ale \u010do vlastne znamen\u00e1? Jednoducho povedan\u00e9, kontrast predstavuje rozdiel medzi najjasnej\u0161\u00edmi a najtmav\u0161\u00edmi \u010das\u0165ami obrazu, ktor\u00e9 obrazovka dok\u00e1\u017ee zobrazi\u0165. Meria, ako dobre telev\u00edzor dok\u00e1\u017ee uk\u00e1za\u0165 svetl\u00e9 a tmav\u00e9 odtiene. Napr\u00edklad kontrast 1000:1 znamen\u00e1, \u017ee najjasnej\u0161ie biele miesto na obrazovke je 1000-kr\u00e1t jasnej\u0161ie […]<\/p>\n","protected":false},"author":1,"featured_media":11785,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[26],"tags":[87],"class_list":{"0":"post-11782","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tv","8":"tag-technologia"},"_links":{"self":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11782","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/comments?post=11782"}],"version-history":[{"count":2,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11782\/revisions"}],"predecessor-version":[{"id":11787,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11782\/revisions\/11787"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media\/11785"}],"wp:attachment":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media?parent=11782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/categories?post=11782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/tags?post=11782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/global.tab-tv.com\/sk\/wp-content\/uploads\/sites\/5\/2024\/09\/Static-contrast-ratio.webp\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/global.tab-tv.com\/sk\/wp-content\/uploads\/sites\/5\/2024\/09\/OLED-vs-QLED-1024x344.webp\")
<\/figure>\n\n\n\n