{"id":10947,"date":"2018-02-11T19:11:07","date_gmt":"2018-02-12T00:11:07","guid":{"rendered":"https:\/\/chenkse.com\/?p=10947"},"modified":"2021-10-03T02:25:17","modified_gmt":"2021-10-03T06:25:17","slug":"led-nayton-faktoja","status":"publish","type":"post","link":"https:\/\/chenkse.com\/fi\/led-nayton-faktoja\/","title":{"rendered":"LED-n\u00e4yt\u00f6n tosiasiat"},"content":{"rendered":"
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<\/div>\t\t<\/div>\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t
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Mik\u00e4 on LED?<\/strong><\/h2>

LED on lyhyt sanoista valodiodi. LED l\u00e4hett\u00e4\u00e4 valoa s\u00e4hk\u00f6isen luminesenssin seurauksena. Se tunnetaan my\u00f6s nimell\u00e4 "kylm\u00e4 valo", koska toisin kuin vanhanaikaisissa hehkulampuissa, valoa ei tuoteta kuumentamalla metallifilamenttia. Diodi puolestaan l\u00e4hett\u00e4\u00e4 valoa, kun se virtaa kahden erikoispinnoitetun piin puolijohteen l\u00e4pi. Se on yksi energiatehokkaimmista ja virtaa s\u00e4\u00e4st\u00e4vist\u00e4 tavoista tuottaa valoa.<\/p>

LED koostuu kiinteist\u00e4 materiaaleista, joissa ei ole liikkuvia osia, ja se on usein valettu l\u00e4pin\u00e4kyv\u00e4ksi muoviksi. T\u00e4m\u00e4 takaa korkean kest\u00e4vyyden. Kun LED palaa, se tuottaa melkein nolla l\u00e4mp\u00f6\u00e4. T\u00e4m\u00e4 v\u00e4hent\u00e4\u00e4 elektronisten osien j\u00e4\u00e4hdytysongelmaa.<\/p>

Ensimm\u00e4isen ledin loi ven\u00e4l\u00e4inen keksij\u00e4 Oleg Losev vuonna 1927. Monien vuosien ajan oli mahdollista tuottaa vain infrapuna-, punainen ja keltainen ledi\u00e4. N\u00e4m\u00e4 diodit l\u00f6ytyiv\u00e4t kaikesta kaukos\u00e4\u00e4timist\u00e4 kelloradioihin.<\/p>

Vasta 1994 japanilainen tiedemies Shuji Nakamura pystyi osoittamaan tehokkaan sinisen LEDin. Pian seurasivat valkoiset ja vihre\u00e4t LEDit, jotka loivat perustan LED-vallankumoukselle, jonka olemme n\u00e4hneet valaistuksessa ja n\u00e4ytt\u00f6tekniikassa.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t

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Kuinka LED-n\u00e4ytt\u00f6 toimii?<\/strong><\/h2>

An LED-n\u00e4ytt\u00f6<\/a> koostuu useista l\u00e4hekk\u00e4in olevista LED-valoista. Vaihtelemalla kunkin LEDin kirkkautta, diodit muodostavat yhdess\u00e4 kuvan n\u00e4yt\u00f6lle.<\/p>

Kirkkaan v\u00e4rikuvan luomiseen k\u00e4ytet\u00e4\u00e4n lis\u00e4aineiden sekoittamisen periaatteita, jolloin uudet v\u00e4rit syntyv\u00e4t sekoittamalla valoa eri v\u00e4reihin. LED-n\u00e4ytt\u00f6 koostuu punaisista, vihreist\u00e4 ja sinisist\u00e4 LEDeist\u00e4, jotka on asennettu kiinte\u00e4\u00e4n kuvioon. N\u00e4m\u00e4 kolme v\u00e4ri\u00e4 muodostavat pikselin. Diodien voimakkuutta s\u00e4\u00e4t\u00e4m\u00e4ll\u00e4 voidaan muodostaa miljardeja v\u00e4rej\u00e4. Kun katsot LED-n\u00e4ytt\u00f6\u00e4 tietylt\u00e4 et\u00e4isyydelt\u00e4, joukko v\u00e4rillisi\u00e4 pikseleit\u00e4 n\u00e4hd\u00e4\u00e4n kuvana.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t

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\u00a0<\/p>

\u00a0<\/p>

\u00a0<\/p>

\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t

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Mik\u00e4 on<\/strong> RGB?<\/strong><\/h2>

RGB on lyhenne sanoista punainen, vihre\u00e4 ja sininen. Se on v\u00e4rimaailma, jossa hy\u00f6dynnet\u00e4\u00e4n sit\u00e4, ett\u00e4 kaikki n\u00e4kyv\u00e4t v\u00e4rit voidaan sekoittaa n\u00e4ist\u00e4 kolmesta perusv\u00e4rist\u00e4. Sit\u00e4 k\u00e4ytet\u00e4\u00e4n l\u00e4hes kaikentyyppisiss\u00e4 n\u00e4yt\u00f6iss\u00e4, mukaan lukien LED-n\u00e4yt\u00f6t.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t

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MIK\u00c4 ON<\/strong>\u00a0SMD?<\/strong><\/h2>

SMD tarkoittaa pinta-asennettavaa laitetta. N\u00e4m\u00e4 ovat elektronisia komponentteja, jotka on asennettu pintaan suoraan piirilevylle - eik\u00e4 kuten aikaisemmin juotettaessa metallitappia piirilevyn alapuolelle.<\/p>

LED-n\u00e4ytt\u00f6tekniikassa SMD-konseptia k\u00e4ytet\u00e4\u00e4n hieman eri tavalla. SMD-n\u00e4ytt\u00f6 on LED-n\u00e4ytt\u00f6, jossa punaiset, vihre\u00e4t ja siniset diodit on asetettu pieneen muovikoteloon, joka on asennettu pintaan n\u00e4yt\u00f6n painetuille piirilevyille. Kun diodit kapseloidaan t\u00e4ll\u00e4 tavalla, ne viev\u00e4t paljon v\u00e4hemm\u00e4n tilaa, jolloin on mahdollista tuottaa n\u00e4ytt\u00f6j\u00e4, joissa diodien v\u00e4linen et\u00e4isyys on pienempi ja resoluutio suurempi.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t

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Kuinka paljon tehoannosta ja LED-n\u00e4ytt\u00f6\u00e4 k\u00e4ytet\u00e4\u00e4n?<\/strong><\/h2>

LED on eritt\u00e4in energiatehokas tekniikka, joten energiaa s\u00e4\u00e4st\u00e4vi\u00e4 LED-lamppuja k\u00e4ytet\u00e4\u00e4n nyky\u00e4\u00e4n laajasti. LED-n\u00e4yt\u00f6n diodien tehon m\u00e4\u00e4r\u00e4 riippuu n\u00e4yt\u00f6n tyypist\u00e4, kirkkaudesta ja k\u00e4yt\u00f6st\u00e4.<\/p>

LEDej\u00e4 ja n\u00e4ytt\u00f6j\u00e4 on monenlaisia. Esimerkiksi sis\u00e4n\u00e4yt\u00f6n virrankulutus on erilainen kuin ulkona olevan digikyltin, joka on n\u00e4ht\u00e4v\u00e4 suorassa auringonpaisteessa. N\u00e4yt\u00f6n kirkkaus on my\u00f6s t\u00e4rke\u00e4 tekij\u00e4. Kuvien on oltava selkeit\u00e4, mutta n\u00e4yt\u00f6n valo ei saa h\u00e4ik\u00e4ist\u00e4. An ulkona oleva LED-n\u00e4ytt\u00f6<\/a> t\u00e4ytyy olla paljon kirkkaampi p\u00e4iv\u00e4nvalossa kuin pime\u00e4ss\u00e4.<\/p>

N\u00e4yt\u00f6ll\u00e4 on my\u00f6s vaikutusta. LED n\u00e4ytt\u00e4\u00e4 kuvat kytkem\u00e4ll\u00e4 p\u00e4\u00e4lle ja s\u00e4\u00e4t\u00e4m\u00e4ll\u00e4 v\u00e4rillisten diodien kirkkautta. T\u00e4ysin valkoinen kuva mustalla tekstill\u00e4 vaatii siis paljon enemm\u00e4n valaistuja diodeja - ja paljon enemm\u00e4n virtaa - kuin valkoinen teksti mustalla taustalla.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t

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Kuinka kauan annos ja LED-n\u00e4ytt\u00f6 kest\u00e4v\u00e4t?<\/strong><\/h2>

LED-n\u00e4yt\u00f6n el\u00e4m\u00e4st\u00e4 on vaikea sanoa mit\u00e4\u00e4n erityist\u00e4, koska monet tekij\u00e4t tulevat esiin. Asianmukaisella huollolla n\u00e4ytt\u00f6 voi kuitenkin kest\u00e4\u00e4 yli kymmenen vuotta. Kuten kaikentyyppisen elektroniikan kohdalla, elini\u00e4nodotukseen vaikuttaa my\u00f6s p\u00e4ivitt\u00e4inen k\u00e4ytt\u00f6 ja n\u00e4ytt\u00f6ymp\u00e4rist\u00f6. Vaaleat kuvat ja korkea kirkkaus ovat enemm\u00e4n kuluvia n\u00e4yt\u00f6ll\u00e4 kuin tummemmat kuvat ja heikko kirkkaus. My\u00f6s ilmankosteus ja suolapitoisuus voivat tulla esiin.<\/p>

LED-n\u00e4yt\u00f6n k\u00e4ytt\u00f6i\u00e4n aikana diodien valoteho v\u00e4henee. Kuinka paljon riippuu diodien tyypist\u00e4 ja sukupolvesta. Monet LED-n\u00e4yt\u00f6t eiv\u00e4t koskaan k\u00e4yt\u00e4 t\u00e4ydellist\u00e4 valovoimaa, joten v\u00e4hennys on harvoin ongelma.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t

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Mik\u00e4 on Pixel-kuvake? Kuinka se liittyy resoluutioon?<\/strong><\/h2>

N\u00e4yt\u00f6n tarkkuus m\u00e4\u00e4r\u00e4ytyy n\u00e4yt\u00f6n pikselien kokonaism\u00e4\u00e4r\u00e4n mukaan.<\/p>

Suurempi pikselien m\u00e4\u00e4r\u00e4 tekee paremman resoluution, mik\u00e4 tarkoittaa parempaa kuvanlaatua. On an LED-n\u00e4ytt\u00f6<\/a>, pikseliv\u00e4li ja katseluet\u00e4isyys ovat eritt\u00e4in t\u00e4rkeit\u00e4 tekij\u00f6it\u00e4, jotka vaikuttavat merkin suorituskykyyn.<\/p>

\u00a0<\/p>

Mik\u00e4 on pikseliv\u00e4li?<\/strong><\/h3>

Pikseliv\u00e4li kuvaa kuvapisteiden (LED-klustereiden) tiheytt\u00e4\u00a0LED-n\u00e4ytt\u00f6<\/a><\/span>\u00a0ja korreloi resoluution kanssa. Joskus kutsutaan piki- tai pistev\u00e4liksi, pikseliv\u00e4li on et\u00e4isyys millimetrein\u00e4 pikselin keskustasta viereisen pikselin keskustaan. Koska pikseliv\u00e4li osoittaa kahden pikselin v\u00e4lisen tilan m\u00e4\u00e4r\u00e4n, pienempi pikseliv\u00e4li tarkoittaa, ett\u00e4 pikselien v\u00e4lill\u00e4 on v\u00e4hemm\u00e4n tyhj\u00e4\u00e4 tilaa. T\u00e4m\u00e4 vastaa suurempaa pikselitiheytt\u00e4 ja parempaa n\u00e4yt\u00f6n tarkkuutta.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t

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Mink\u00e4 resoluution sinun pit\u00e4isi valita?<\/strong><\/h2>

LED-n\u00e4yt\u00f6n tarkkuus riippuu katseluet\u00e4isyydest\u00e4. Milt\u00e4 et\u00e4isyydelt\u00e4 yleis\u00f6si n\u00e4ytt\u00e4\u00e4 n\u00e4ytt\u00f6\u00e4? Jos olet l\u00e4hell\u00e4 matalan resoluution LED-n\u00e4ytt\u00f6\u00e4 (kaukana diodien v\u00e4lill\u00e4), on vaikea n\u00e4hd\u00e4, mit\u00e4 n\u00e4yt\u00f6ll\u00e4 n\u00e4kyy.<\/p>

Pienempi pikseliv\u00e4li antaa paremman tarkkuuden, mutta on kalliimpaa. Materiaalit ja tuotantokustannukset ovat korkeammat pienemm\u00e4ll\u00e4 pikseliv\u00e4lill\u00e4, koska suuremman pikselitiheyden luomiseksi tarvitaan enemm\u00e4n LED-klustereita.<\/p>

Jos asennat digitaalisen kyltin p\u00e4\u00e4tielle tai rakennuksen julkisivulle, se n\u00e4kyy tietylt\u00e4 et\u00e4isyydelt\u00e4. T\u00e4ss\u00e4 korkean resoluution n\u00e4ytt\u00f6 olisi tarpeeton - ja tarpeettoman kallis. Jos se on lattiataso keskell\u00e4 tavarataloa, yleis\u00f6 p\u00e4\u00e4see paljon l\u00e4hemm\u00e4ksi sit\u00e4. T\u00e4ss\u00e4 korkean resoluution n\u00e4ytt\u00f6 toimii parhaiten.<\/p>

Hyv\u00e4 nyrkkis\u00e4\u00e4nt\u00f6 LED-n\u00e4yt\u00f6ille on: 1 mm pikselikorkeus kutakin katseluet\u00e4isyyden metri\u00e4 kohti.<\/p>\t\t\t\t\t\t\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/div>\t\t\t\t\t<\/div>\t\t<\/section>\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

What Is LED?LED is short for Light Emitting Diode. An LED emits light as a result of electric luminescence. It is also known as \u201ccold light\u201d as, unlike with old-fashioned incandescent bulbs, the light is not produced by heating a metal filament. The diode, on the other hand, emits light when flowing through two specially […]<\/p>\n","protected":false},"author":5,"featured_media":16778,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"categories":[1,20],"tags":[],"class_list":["post-10947","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-industry-news"],"yoast_head":"\nLED display factsLED Display Facts - CHENKSE %<\/title>\n<meta name=\"description\" content=\"LED display fis short for Light Emitting Diode. An LED emits light as a result of electric luminescence. Read more here.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/chenkse.com\/fi\/led-nayton-faktoja\/\" \/>\n<meta property=\"og:locale\" content=\"fi_FI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LED Display Facts\" \/>\n<meta property=\"og:description\" content=\"LED display fis short for Light Emitting Diode. An LED emits light as a result of electric luminescence. 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