CRT, Ntshav, LCD, DLP, thiab TV Cov Kev Txhawb Zej Zog
Kev yuav ib lub TV yuav yog cov nyuab heev hnub no, tshwj xeeb tshaj yog thaum sim ua kom paub seb hom TV twg koj xav tau lossis xav tau. Ploj mus yog qhov CRT (daim duab tube) thiab kev tsav tsheb tom qab-uas yog qhov chaw nyob hauv thaj tsam thib ob ntawm xyoo pua 20th. Tam sim no peb tau zoo mus rau lub xyoo pua 21st, qhov ntev-awaited phab ntsa-mountable TV yog tam sim no.
Txawm li cas los xij, ntau cov lus nug nyob ntawm seb cov kev yees duab tshiab dua li cas yuav ua hauj lwm los ua cov duab. Cov txheej txheem cej luam no yuav tsum tau qee lub teeb rau ntawm qhov sib txawv ntawm TV yees yav dhau los thiab tam sim no.
CRT Technology
Txawm hais tias koj tsis tuaj yeem nrhiav cov CRT TV tshiab tom khw muag khoom ntxiv, ntau ntau cov qub qub yog tseem ua haujlwm nyob rau hauv cov tsev neeg. Nov yog qhov lawv ua haujlwm.
CRT sawv cathode txoj kab tshav dav hlau, uas yog ib qho tseem ceeb ntawm lub tshuab nqus tsev-uas yog vim li cas CRT TVs loj thiab hnyav. Mus tso saib cov duab, CRT TV ntiav siv ib qho hlau kab hluav taws xob uas soj cov kab ntawm phosphors ntawm lub raj ntawm lub raj ntawm kab hauv-kab pib los ua kom muaj duab. Cov nqaj hlau electron originates los ntawm lub caj dab ntawm ib daim duab raj. Cov nqaj yog deflected ntawm nruam tas li uas nws txav hla cov kab ntawm phosphors nyob rau sab laug-rau-txoj cai, txav mus rau kab tom ntej. Qhov kev ua no yog ua kom sai li sai tau tias tus neeg saib xyuas tau pom qhov tshwm sim los ua tiav cov duab txav.
Nyob ntawm seb hom teeb duab tawm sab nraud, cov phosphor lines tuaj yeem raug luam kom raug, uas yog hu ua interlaced scanning, lossis sequentially, uas yog raug xa mus raws li kev xaav scan .
DLP Tshuab
Lwm cov cuab yeej siv, siv hauv xov tooj cua hauv tshuab raj, yog DLP (cov teeb ci), uas tau tsim, tsim, thiab muaj ntawv tso cai los ntawm Texas Instruments. Txawm hais tias tsis muaj kev muag khoom hauv TV daim ntawv txij thaum xyoo 2012, DLP technology yog ciaj sia thiab zoo nyob rau hauv qhov project projectors . Txawm li cas los xij, qee lub DLP TV yeej tseem siv tau hauv tsev.
Lub ntsiab rau DLP tshuab yog DMD (digital micro-iav cuab yeej), ib lub ntim ua los ntawm cov iav tiltable iav. Lub tsom iav tseem hu ua pixels (daim duab ntsiab) . Txhua txhua pixel ntawm DMD nti yog ib daim duab zoo me me uas ntau lab tus lawv muab tso tau rau ib lub nti.
Daim duab duab tso tawm ntawm DMD nti. Lub micromirrors ntawm lub nti (nco ntsoov, txhua micromirror sawv cev ib pixel) ces qaij sai heev thaum hloov duab.
Cov txheej txheem no ua lub hauv paus gray-scale rau daim duab. Cov xim no tau ntxiv thaum lub teeb kis tau los ntawm kev siv cov xim tha xim thiab thau tawm lub micromirrors ntawm DLP nti thaum lawv ceev nrooj los mus deb ntawm lub teeb ci. Cov degree ntawm qaij ntawm txhua lub micromirror ua ke nrog cov kiv nrawm spinning kauj txiav txim siab cov qauv xim ntawm daim duab duab. Raws li nws ua rau cov micromirrors tawm, lub teeb puv ntoob yog xa los ntawm lub lens, thim tawm ib lub iav loj loj, thiab mus rau hauv lub vijtsam.
Plasma Technology
Plasma TVs, thawj TVs muaj nyias, tiaj tus, "hang-on-wall" daim ntawv qhov zoo tshaj plaws, tau siv txij li thaum xyoo 2000s, tab sis nyob rau xyoo 2014, lub xeem plasma TV ua lag luam (Panasonic, Samsung, thiab LG) ) txiav txiav lawv cov neeg siv khoom siv. Txawm li cas los xij, ntau tus tseem siv, thiab koj tseem tuaj yeem nrhiav tau ib qhov rov qab siv dua tshiab, siv, lossis ua kom tiav.
Plasma TVs ntiav cov tswv yim nthuav. Zoo li ib lub TV CRT, ib lub TV ntshav tau tsim cov duab los ntawm teeb pom kev zoo phosphors. Txawm li cas los xij, cov phosphors tsis tau zes los ntawm kev xa khoom hluav taws xob. Xwb, cov phosphors nyob rau hauv ib lub TV ntshav yog lit los ntawm superheated charged roj, zoo ib yam li lub teeb fluorescent. Tag nrho cov phosphor daim duab ntsiab (pixels) tuaj yeem nyob ib zaug, qhov tsis muaj kev luam los ntawm ib txoj hlua hluav taws xob, raws li yog rooj plaub nrog CRTs. Tsis tas li ntawd, txij li thaum lub tshuab hluav taws xob tsis sib haum (electron beam) tsis tsim nyog, qhov kev xav tau rau ib daim duab tub yees duab (CRT) yog muab tshem tawm, ua rau cov khoom sib tw nyias nyias.
Yog xav paub ntxiv txog kev siv ntshav hauv TV, mus saib peb tus khub qhia .
LCD Tshuab
Ua lwm txoj haujlwm, LCD TVs kuj muaj nyias qhov txee profile zoo li lub TV ntshav. Lawv kuj yog hom TV tshaj plaws. Txawm li cas los xij, tsis txhob teeb pom kev ua phosphors, cov pixels tsuas yog muab tua los yog ntawm ib qho kev ua tshiab tshiab.
Hauv ntawv, tag nrho cov duab tau tso tawm kom pom (los yog ua kom zoo dua) txhua txhua txhua lub sijhawm, 30th, 30th, 60th, lossis 120th ntawm ib pliag. Ua tau, nrog LCD koj tuaj yeem tsim kho tshiab ntawm 24, 25, 30, 50, 60, 72, 100, 120, 240, lossis 480 (kom deb li deb). Txawm li cas los xij, feem ntau siv cov khoom noj tshiab hauv LCD TVs yog 60 lossis 120. Nco ntsoov tias qhov tshiab ua tsis zoo ib yam li tus nqi ntawm tus nqi .
Nws tseem yuav tsum tau sau tseg tias LCD pixels tsis ua lawv lub teeb. Hauv kev txiav txim siab rau LCD TV los tso saib pom duab, LCD's pixels yuav tsum tau "backlit." Lub qab nteg, feem ntau, yog qhov. Nyob rau hauv cov txheej txheem no, cov pixels tau qhib rau thiab rho tawm raws li cov cai ntawm daim duab. Yog pixels tawm, lawv tsis txhob cia cov teeb pom kev rov los ntawm, thiab thaum lawv nyob rau, qhov teeb pom kev rov qab los.
Qhov kev teeb tsa kev lag luam rau LCD TV tuaj yeem yog CCFL lossis HCL (fluorescent) lossis LED. Lub sij hawm "LED TV" yog hais txog kev siv lub teeb nruab nrig. Tag nrho cov TV TVs yog cov TV LCD ua tau .
Tseem muaj cov yees siv ua ke nrog cov nrig txog kev lag luam, xws li thoob ntiaj teb dimming thiab lub zos dimming. Cov dimming technologies ntiav ib qho LED-raws tag nrho array los yog ntug kev nruab ntug.
Ntiaj teb dimming yuav sib txawv ntawm cov teeb pom kev rov qab txhua lub pixels rau cov duab tsaus nti los sis qhov kaj ntug, thaum lub zos dimming yog tsim los ntaus cov duab tshwj xeeb ntawm pixels nyob ntawm seb cov cheeb tsam ntawm daim duab yuav tsum tau tsaus zog los yog sib zog tshaj qhov seem ntawm daim duab.
Ntxiv rau kev teeb tsa thiab ua kom tsis muaj zog, lwm lub tshuab ua haujlwm tau siv rau kev xaiv LCD TVs los txhim kho cov xim: quantum dots . Cov no yog cov tshwj xeeb "zus" nanoparticles uas yog cov xim tshwj xeeb. Quantum dots yog muab tso rau hauv LCD npo npo los yog ntawm ib zaj duab xis txheej nruab nrab ntawm lub teeb thiab lub pixels LCD. Samsung hais txog lawv tus cwj pwm quantum-dot li TVs QLED: Q rau quantum dots, thiab LED rau LED backlight-tab sis tsis muaj ib yam uas qhia txog TV ua tus LCD TV, nws yog.
Rau ntau LCD TVs, nrog rau qhov kev xav tau tswv yim, kuj tshawb xyuas peb Kev Qhia rau LCD TVs .
OLED Technology
OLED yog cov cuabyeej tshiab hauv TV rau cov neeg siv. Nws tau raug siv hauv xov tooj ntawm tes, ntsiav tshuaj, thiab lwm yam kev siv tshuaj ntsuam me me rau ib ntus, tab sis txij li thaum 2013 nws tau raug ntse dhau siv rau cov ntawv loj hauv TV siv.
OLED sawv cev rau cov teeb pom kev zoo ntawm lub teeb-emitting diode. Kom nws yooj yim, qhov screen yog ua los ntawm pixel tsuas, organically raws li (tsis yog, lawv tsis tau ciaj). OLED muaj qee tus yam ntxwv ntawm LCD thiab ntshav TV.
Qhov OLED muaj ntau tus lej nrog LCD yog tias OLED tuaj yeem tso tau rau hauv cov txheej txheej heev, ua kom nyias thev duab teeb pom kev zoo thiab siv zog siv zog. Txawm li cas los xij, xws li LCD, OLED TVs yuav raug tuag pixel tsis xws luag.
Yuav ua li cas OLED muaj ntau nrog cov ntshav tawm yog tias cov pixels muaj kev cia siab (tsis muaj teeb ci ntsa iab, ci ci, los yog lub zos qhov tsis sib haum), yuav tsum ua tau tob tob dub (qhov tseeb, OLED tuaj yeem tsim dub), OLED muab ib lub dav uas tsis muaj qhov pom ntawm lub kaum ntse ntse, sib piv hauv cov lus teb. Txawm li cas los xij, xws li ntshav, OLED yog raug mob rau hauv.
Tsis tas li ntawd, qhov qhia tau tias cov ntxiab OLED muaj luv luv dua li LCD lossis ntshav, tshwj xeeb tshaj yog nyob rau ntawm xiav qhov ntawm cov xim spectrum. Tsis tas li ntawd, tam sim no cov nqi hluav taws xob ntawm cov hluav taws xob hauv OLED rau cov vijtsam loj loj uas yuavtsum tau muaj rau TVs yog piv rau txhua tus uas twb muaj nyob hauv TV.
Txawm li cas los xij, mus nrog ob qho zoo thiab cov negatives, OLED yog suav hais tias yog los ntawm ntau yam los tso saib cov duab zoo tshaj plaws nyob rau hauv lub TV technology. Tsis tas li ntawd, ib qho tawm ntawm lub cev ntawm OLED TV yog tias cov phiajcim yog nyias nyias uas lawv ua tau yooj ywm, uas ua rau kev tsim ntawm nkhaus hauv TV . (Qee cov LCD TVs tau nrog cov ntxaij lim dej zoo li.)
OLED cuab yeej siv tau los ua ntau txoj hauv kev TV. Txawm li cas los xij, ib tus txheej txheem uas tsim los ntawm LG yog ib qho kev siv ntau tshaj plaws. LG txheej txheem hu ua WRGB. WRGB muab cov xim OLED uas yog tus kheej tso tawm nrog cov xim liab, ntsuab, thiab xiav xim. LG's txoj kev xav yog kom txwv cov nyhuv thaum ntxov xiav xim degradation uas zoo li tshwm sim nrog xiav tus kheej emitting OLED pixels.
Tsau-Pixel Lus Qhia
Txawm tias cov kev sib txawv ntawm cov ntshav, LCD, DLP, thiab OLED TV, lawv sib qhia ib yam nkaus.
Plasma, LCD, DLP, thiab cov TVs OLED muaj ib cov pixels pixels qhov kawg; Yog li, lawv yog cov "taag-pixel". Cov tswv yim tawm tswv yim uas muaj ntau dua kev tsim nyog yuav tsum tau scaled kom haum pixel teb suav ntawm cov ntshav qab zib, LCD, DLP, los yog OLED tso saib. Piv txwv, ib qho teeb meem raug 1080i HDTV tshaj tawm yuav tsum muaj cov duab ntawm 1920 x 1080 pixels rau ib qho taw qhia ib qho ntawm HDTV duab.
Txawm li cas los xij, vim ntshav, LCD, DLP, thiab OLED TV tsuas pom cov duab thaij, 1080i qhov chaw pib muaj kev sib deev sib tw rau 1080p TV, lossis deinterlaced thiab scaled mus rau 768p, 720p, lossis 480p, nyob ntawm seb native pixel daws teeb meem ntawm lub TV. Technically, tsis muaj ib qho zoo li 1080i LCD, ntshav, DLP, los yog TV hauv TV.
Lub Kab Hauv Qab
Thaum nws los mus tso duab ntawm lub vev xaib, ntau cov tshuab siv, thiab txhua lub tshuab siv yav dhau los thiab tam sim no muaj qhov zoo thiab qhov tsis zoo. Txawm li ntawd los, qhov kev tshawb nrhiav yeej ib txwm ua kom qhov tshuab "invisible" rau tus neeg saib. Txawm hais tias koj xav ua kom paub txog cov cuab yeej hluav taws xob, nrog rau tag nrho lwm cov nta uas koj xav tau thiab dab tsi yuav haum hauv koj chav , cov kab hauv qab yog seb koj pom ntawm qhov screen zoo li zoo rau koj thiab koj yuav tau ua dab tsi uas tshwm sim.