Sida loo doorto garaafka shaashadda TV-ga

prehistory

Telefishanadii ugu horreeyay ee la soo saaray wax soo saar ayaa lagu soo bandhigay muuqaal iyadoo la isticmaalayo tuubbooyinka loo yaqaan 'cathode ray tube' (CRT) ama tuubada sawirka. Tikniyoolajiyaddu qummanayn, laakiin xilligii waxsoosaarka baaxadda lahaa laga bilaabay 1934, waxay ahayd kacaan. Faa'iido darrooyinka tikniyoolajiyada waxay ahayd mabda'a loo yaqaan 'einesines'. Tuubbooyinka loo yaqaan 'cathode ray tube' wuxuu soo saaray durdurro elektarooniin ah oo ku dhacay shaashadda iyo midab bidix.

 

 

Nasiib darrose, qayb ka mid ah elektaronnada ayaa marayey shaashadda oo waxay gaareen aragtida, waxaana ifafaalahaas loogu magac daray "shucaac". Shucaaca iyo saamaynta uu ku leeyahay jidhka bini’aadamka darteed, waxaa jiray xayiraad dhanka masaafada aad ku daawan karto TV, iyo xayiraad waqtiga ay suurtogal ahayd, si amaan ah, inaad ku raaxeysato bandhigyada TV-ga aad jeceshahay. Ammaan ahaan, waxaa loo tixgeliyay masaafada 4-5 m ilaa shaashadda TV-ga, iyadoo la siinayo diagonals-yada aad u yar ee telefishannada CRT, way adag tahay in loogu yeero sida daawashada TV-ga oo ku habboon.

Casriga

Waqti badan ayaa soo maray ilaa kacaankii telefishanka CRT iyo gebi ahaanba teknoolojiyadda cusub ee Plasma, LCD (kiristaalada dareeraha ah), LED (Nalalka iftiinka) ee LED-ka ayaa galay masraxa. Marka laga reebo TV-yada plasma, oo, sida CRT TVs, oo leh shucaac aad u sareeya, LCD iyo LED TV-yada waxay la'yihiin shucaac noocan ah, maxaa yeelay waxay ku shaqeeyaan mabda'a gabi ahaanba ka duwan soo saarista sawirka.

 

 

Halkii tuubada rayidka cathode ee ay qarxiyeen elektaroonigga, telefishannada dareeraha ah ee dareeraha ah waxay ku shaqeeyaan iyagoo adeegsanaya mowjado iftiin ah oo ka gudbaya shaashadda RGB ee shaashadda. Maqnaanshaha shucaaca elektaroonigga ah ayaa ku dhowaad meesha ka saaray baahida loo qabo in laga guuro telefishanka meel fogaan aamin ah. Hada oo leh teknolojiyad cusub, masaafada aad ku daawan karto TV ayaa noqon kara wax kasta.

Dhammaan waxyaabaha kor ku xusan waxaa loogu talagalay in lagu kala diro fikradda ah masaafada u jirta masaafada aad ka daawan karto TV-ga iyo jaantuskiisa, maxaa yeelay Aagga shucaaca iyo masaafada aaminka ah waxay macno u sameysaa kaliya telefishanka CRT, waana tan taariikh.

 

Laakiin waxaa jira barta muhiimka ah!

Sidee loo doortaa garaafka shaashadda TV-ga?

Qodobka muhiimka ah ee aan kor ku soo sheegnay waa xalka shaashadda. Xaqiiqdu waxay tahay haddii TV leh jaantus ballaaran, tusaale ahaan, injiyooyinka 55, uu leeyahay xallinta shaashadda FULL HD (Pixels 1920x1080), markaa markaad daawato telefishinka aad ugu dhow, oo ku saabsan mitirka 1, waxaad arki kartaa pixels shaashadda.

Laakiin markii la eego, sida caadiga ah, waxay telefishanka ka daawadaan masaafada u jirta 1,5-2 m, way adag tahay in laga arko masaafadahan. Intaa waxaa sii dheer, telefishannada leh jaantus cabbir ah oo leh illaa iyo dhererkoodu yahay 40 inji hadda waxay leeyihiin FUL HD xallinta, telefishannada leh jaantus ballaaran ayaa durba leh qaraarka Ultra HD 4K (3840 × 2160 pixels).

 

 

Sidee loo doortaa garaafka shaashadda TV-ga? Jawaabtu way fududahay: inbadan ayaa ka fiican. Haddii aad fursad u leedahay inaad ku iibsato TV leh jaantus cabbirkiisu yahay 40 inji - taasi waa wax fiican! Hadaad awoodo iibso TV oo leh qiyaasta 80 - waa xitaa ka sii fiican. Laakiin fiirso xallinta shaashadda telefishanka, elektiroonigga illaa iyo cabbirka 50 inji ayaa yeelan kara FUL HD qaraar, waayo diagonals-yada noocaan ah Ultra HD 4K ayaa noqon doona mid aad u badan, maadaama aysan suurtagal noqon doonin in la dareemo farqiga.

 

 

Laakiin TV-yada ka soo jeeda 52-55 inji iyo wixii ka sareeya waa inay horeba u lahaadaan xalka screen HD HD 4K, maxaa yeelay xalka hoose ee jaantus ballaaran, miyir beelid waa la arki doonaa marka aad si dhow u daawaneyso TV.