Ikhwalithi Yesithombe Kumabonakude E-LED
Ithelevishini (i-TV) isibe yingxenye engenakuhlukaniswa yempilo yanamuhla. Njengoba ubuchwepheshe buthuthuka, ithelevishini nayo iye yathuthuka kakhulu, ikakhulukazi maqondana nekhwalithi yesithombe. Enye yezinto ezintsha ezinkulu embonini yethelevishini kwaba ukwethulwa kwamathelevishini e-LED (Light Emitting Diode). Amathelevishini e-LED manje aseyisinqumo esiyinhloko kubathengi abaningi ngenxa yezinzuzo zawo eziningi, ikakhulukazi maqondana nekhwalithi yesithombe. Lesi sihloko sizoxoxa ngekhwalithi yesithombe kumathelevishini e-LED ngokujulile kanye nezici ezithonya lokho.
Iyini iThelevishini ye-LED?
Ngaphambi kokuxoxa kabanzi ngekhwalithi yesithombe, kubalulekile ukuqonda ukuthi iyini ithelevishini ye-LED. Ithelevishini ye-LED empeleni uhlobo lwethelevishini ye-LCD (Liquid Crystal Display) esebenzisa ama-LED njengomthombo wayo wokukhanya. Amathelevishini e-LCD endabuko asebenzisa izibani ze-cathode fluorescent ezibandayo (ama-CCFL) zokukhanyisa ngemuva, kuyilapho amathelevishini e-LED esebenzisa ama-diode akhipha ukukhanya. Ukusetshenziswa kwama-LED njengomthombo wokukhanya kunikeza izinzuzo eziningana kunezinhlelo zokukhanyisa ze-CCFL, njengemibala ekhanyayo, ukugqama okuphezulu, kanye nokusetshenziswa kwamandla okuphansi.
Ikhwalithi Yesithombe Kumabonakude E-LED
1. Isixazululo
Ikhwalithi yesithombe sethelevishini ithonywa kakhulu yisinqumo sayo. Isinqumo yinani lamaphikseli angaboniswa esikrinini sethelevishini. Uma isinqumo siphezulu, isithombe esiphumelayo sibukhali futhi sinemininingwane eminingi. Amathelevishini e-LED afika ngezindlela ezahlukahlukene, kusukela ku-HD Ready (720p), i-Full HD (1080p), kuya ku-Ultra HD noma i-4K (2160p), ngisho ne-8K. Isinqumo se-4K njengamanje siyindinganiso entsha embonini yethelevishini, enikeza inani eliphindwe kane lamaphikseli esinqumo se-Full HD, okuholela ezithombeni ezibukhali nezinemininingwane eminingi.
2. Umehluko
Umehluko yisilinganiso esiphakathi kwezindawo ezikhanyayo nezimnyama zesithombe. Umehluko omuhle udala isithombe esiguquguqukayo nesingokoqobo. Amathelevishini e-LED ngokuvamile anesilinganiso somehluko omkhulu ngenxa yamandla ama-LED okukhiqiza abamnyama abajulile kunama-TV e-LCD avamile. Lokhu kungenxa yobuchwepheshe bendawo bokufiphaza, lapho izingxenye ezithile zesizinda se-LED zingafiphazwa noma zicinywe ngazinye, okuholela kubamnyama abajulile nemininingwane ecacile ezithombeni ezimnyama.
3. Ukukhanya
Ukukhanya kungenye into ebalulekile ekhwalithini yesithombe. Ukukhanya okuphezulu kwamathelevishini e-LED kuwenza afaneleke ukubukwa emakamelweni akhanyayo. Isikrini esikhanyayo sivumela izithombe ukuthi zibonakale zicacile futhi zicacile ngisho nasezimweni zokukhanya kwegumbi eziqinile. Lokhu kusiza futhi ukunciphisa ukubonakaliswa kwesikrini.
4. Ukukhiqizwa Kombala
Ikhono lokukhiqiza imibala le-TV ye-LED nalo liyisici esibalulekile esithinta ikhwalithi yesithombe. Ama-TV e-LED ayakwazi ukubonisa ububanzi bombala obanzi kunobuchwepheshe bethelevishini bangaphambilini. Ngobuchwepheshe be-Wide Color Gamut (WCG) kanye ne-High Dynamic Range (HDR), ama-TV e-LED angabonisa imibala egqamile, enembile, nengokoqobo, okuthuthukisa ulwazi lokubuka lonke.
5. Izinga Lokuvuselela
Izinga lokuvuselela liyinani lezikhathi isithombe esikrinini esibuyekezwa ngazo ngomzuzwana, elilinganiswa nge-Hertz (Hz). Uma izinga lokuvuselela liphezulu, ukunyakaza kwesithombe kubushelelezi, ikakhulukazi ekuboniseni okuqukethwe okusheshayo njengezemidlalo noma imidlalo. Amathelevishini e-LED ngokuvamile anikeza amazinga aphezulu okuvuselela kunamathelevishini e-LCD avamile, okusho ukuthi angabonisa izithombe ezibushelelezi ezingenayo i-motion blur.
6. I-engeli yokubuka
I-engeli yokubuka ibhekisela engela lapho isithombe esikrinini sihlala sicacile khona futhi imibala ayishintshi noma ifiphale. Enye yezingqinamba zamathelevishini e-LED i-engela yawo yokubuka encane uma iqhathaniswa nobuchwepheshe be-OLED. Kodwa-ke, abakhiqizi abaningi bathuthukise ama-engeli okubuka kumamodeli abo akamuva ngokusebenzisa amasu afana namaphaneli e-IPS (In-Plane Switching), athuthukisa ikhwalithi yesithombe uma ibukwa kusuka kuma-engeli ahlukahlukene.
Ezinye Izinto Ezithinta Ikhwalithi Yesithombe
Ngaphandle kwezici eziyinhloko okukhulunywe ngazo, kunezinye izici eziningana ezidlala indima ekunqumeni ikhwalithi yesithombe kuthelevishini ye-LED.
1. Iprosesa Yesithombe
Iprosesa yesithombe ingubuchopho obusemuva kwesibonisi sethelevishini, icubungula idatha ebonakalayo ngaphambi kokuba iboniswe esikrinini. Amaprosesa esithombe athuthukile ngokuvamile ayakwazi ukunciphisa umsindo, ukwandisa ukucaca, kanye nokwenza ngcono umbala nokuqhathanisa, okuholela kwikhwalithi yesithombe engcono.
2. Isignali yokufaka
Ikhwalithi yesithombe eboniswa esikrinini sethelevishini se-LED nayo incike kwikhwalithi yesignali yokufaka. Ukusebenzisa umthombo wevidiyo wekhwalithi ephezulu, njenge-Blu-ray, ukusakaza kwe-4K, noma ikhonsoli yegeyimu yakamuva, kungaqinisekisa isithombe esingcono kunokusebenzisa isignali ejwayelekile noma enesisombululo esiphansi.
3. Ukulinganiswa Kwesikrini
Ukulinganiswa kwesikrini ukulungiswa kwamapharamitha afana nokukhanya, ukugqama, ukucaca, kanye nokukhiqizwa kombala kuthelevishini. Ukulinganiswa okufanele kungathuthukisa ikhwalithi yesithombe, kufinyelele amandla aphelele kamabonakude we-LED.
4. Okuqukethwe kwe-HDR
Ukusetshenziswa okuthandwa kakhulu kokuqukethwe kwe-HDR (High Dynamic Range) nakho kunegalelo ekuthuthukiseni ikhwalithi yesithombe. Okuqukethwe kwe-HDR kunikeza ububanzi bemibala nokukhanya, okuvumela omabonakude ukuthi babonise izithombe ezinemininingwane eminingi nezingokoqobo.
Isiphetho
Ikhwalithi yesithombe samathelevishini e-LED iyamangalisa ngempela futhi ithuthuke kakhulu eminyakeni yamuva nje. Izici ezifana nokucaca, ukuqhathanisa, ukukhanya, ukukhiqizwa kombala, izinga lokuvuselela, kanye ne-engeli yokubuka konke kunegalelo ekudaleni isithombe esibukhali, esikhanyayo, nesingokoqobo. Ngaphezu kwalokho, ukufika kobuchwepheshe obusha njenge-HDR kanye nabacubunguli bezithombe abathuthukile kuthuthukisa kakhulu ulwazi lokubuka.
Njengoba ubuchwepheshe buqhubeka nokuthuthuka, cishe sizobona ukuthuthuka okwengeziwe kwikhwalithi yesithombe se-TV ye-LED esikhathini esizayo. Kodwa-ke, ngokuqonda izici ezibalulekile ezithonya ikhwalithi yesithombe namuhla, abathengi bangenza izinqumo ezinolwazi oluthe xaxa futhi bakhethe ithelevishini efanelana kahle nezidingo zabo kanye nezintandokazi zabo. Ama-TV e-LED abeke indinganiso ephezulu embonini yethelevishini yanamuhla, ethembisa isipiliyoni sokubuka esingenakuqhathaniswa kubathandi bezokuzijabulisa emhlabeni jikelele.
