Ungayikhetha njani idigital yesikrini seTV
ukubuzwa
Iithelevishini zokuqala ezifakwe kwimveliso zibonisa umfanekiso kusetyenziswa i-cathode ray tube (CRT) okanye ityhubhu yomfanekiso. Itekhnoloji ayizange igqibelele, kodwa ngelo xesha ukuveliswa kwesininzi kwi-1934, yayiyinguqu. Ukungafezeki kwetekhnoloji bekungumgaqo we-kinescope. Ityhubhu ye-cathode ray ikhuphe umjelo weelectron ezibetha kwiscreen kunye nombala wasekhohlo.
Ngelishwa, enye yeelektroni ziye zadlula kwiscreen zaza zafikelela kumbukeli, kwaye le meko yabizwa ngokuba yi "radiation". Ngenxa yemisebe kunye nefuthe layo emzimbeni womntu, bekukho imiqobo kumgama ongayibukela umabonwakude, kunye nezithintelo ngexesha ekwenzeka ngalo, ngokukhuselekileyo, ukonwabela iinkqubo zakho ozithandayo zeTV. Ikhuselekile, yathathelwa ingqalelo umgama we-4-5 m kwiscreen seTV, inikezwe imbonakalo encinci kakhulu yeethelevishini zeCRT, kunzima ukubiza ukubonwa kweTV kube lula.
Ixesha langoku
Ixesha elininzi lidlulile ukusukela kutshintsho lweTV yeTV kunye neteknoloji entsha kabisa iPlasma, i-LCD (amakristali alwelo), i-LED (ukukhanya kwe-LED) ungene kwinqanaba. Ngaphandle kweeTV ze-plasma TVs, ezithi, njengee-CRT TVs, zibe nomgangatho ophakamileyo wemitha, ii-LCD kunye neeTV ze-TV zinqongopheleyo kwimitha, kuba zisebenza kumgaqo owahlukileyo wokuphuma kwemifanekiso.
Endaweni ye-cathode ray ityhubhu eqhoqhoqhoqhoqhoqhoqhoqhoqho, iithelevishini zekristalu engamanzi zisebenza kusetyenziswa amaza okukhanya adlula kwi-matrix yeskrini. Ukungabikho kwemitha ye-elektroni kuphantse kwasusa isidingo sokuhamba kude neTV kumgama okhuselekileyo. Ngoku ngetekhnoloji entsha, umgama onokuwubukela kuyo umabonwakude unokuba iyintoni na.
Zonke ezi zinto zikhankanywe apha ngasentla zenzelwe ukuhambisa uluvo loqhelaniso lomgama oqhele ukubukela umabonakude kunye nedigonal yayo, kuba indawo yemisebe kunye nomgama okhuselekileyo kwenza ingqiqo kuphela kwimeko yeTVT, kwaye le yimbali.
Kodwa kukho inqaku elibalulekileyo!
Ungayikhetha njani idigital yesikrini seTV?
Inqaku elibalulekileyo elikhankanywe apha ngasentla sisigqibo sesikrini. Inyani yile yokuba ukuba umabonakude one-diagonal enkulu, umzekelo, i-intshi ye-55, unesisombululo sesikrini se-Full HD (i-1920x1080 pixels), ke xa ubukele umabonakude ngokusondele kakhulu, malunga nemitha ye-1, unokubona iipikseli kwiscreen.
Kodwa benikwe loo nto, njengomthetho, babukela umabonakude kumgama we-1,5-2 m, kunzima kakhulu ukubabona bevela kula mgama. Ukongeza, iithelevishini ezine-diagonal ezifikelela kwi-intshi ye-40 ngoku zine-HD HD isisombululo, iithelevishini ezine-diagonal enkulu sele zinesisombululo se-Ultra HD 4K (i-3840 × 2160 pixels).
Ungayikhetha njani idigital yesikrini seTV? Impendulo ilula: kokukhona kungcono ngakumbi. Ukuba unethuba lokuthenga iTV kunye ne-diagonal ye-intshi ye-40 -ilungile! Ukuba unako ukuthenga iTV ene-intshi ye-80-ingcono ngakumbi. Kodwa jonga ukusonjululwa kwesikrini seTV, ii-elektroniki ukuya kuthi ga kwi-intshi ye-50 inokuba nesisombululo ESIMAHLA se-HD, kuba isinxibo esinjalo isisombululo se-Ultra HD 4K siyakuba shushu kakhulu, kuba akuyi kuba lula ukuqaphela umohluko.
Kodwa ii-TVs ezivela kwi-52-55 intshi nangaphezulu kufuneka sele zinesisombululo esikrinini se-Ultra HD 4K, kuba ngesisombululo esisezantsi kwi-diagonal enkulu, ukhula kwengqolowa kuya kuphawuleka xa ubukele iTV ngokusondele.