Thaum nws tawm los tso saib tshuab, cov neeg xav ua ntej cov kua siv lead ua kua (LCD). Nrog rau sijhawm ntawm ntau zaus, qee cov duab tshiab tau pib nkag mus rau tib neeg lub neej. LED zaub technology yog ib qho ntawm lawv. Yog tias tsis muaj kev nkag siab txog kev sib txawv ntawm ob qhov kev yees duab, nws nyuaj rau nrhiav qhov txawv. Qhov tsab xov xwm no yuav piav qhov txawv ntawm LCD thiab LED ntawm qhov tseemceeb ntawm cov zaub thiab lub hauv paus ntsiab lus ntawm lub teeb.
LED teeb pom kev zoo
Cov teeb pom kev tom qab siv lub teeb ci tawm ntawm lub teeb ci ntsa iab. Lub teeb-emitting diodes yog ua los ntawm ob peb txheej txheej ntawm doped semiconductor cov ntaub ntawv, ib txheej nrog ntau npaum li cas ntawm electrons, thiab lwm yam tsis muaj electrons los tsim daim ntawv zoo. Tam sim no dhau los ntawm kev khiav hauj lwm, thiab electrons thiab qhov muab sib txuas nrog txhua lwm yam. Lub zog tso tawm hauv daim ntawv ntawm lub teeb tawg. Thaum siv cov khoom sib txawv ntawm semiconductor, lub teeb emitting diodes muaj sib txawv emitting yam ntxwv tau.
LED teeb pom kev zoo tshuab muaj kev pom zoo nyob rau hauv cov xim, yog li nws nyiam nyob rau hauv cov khoom tsim. Tam sim no dhau CCFL (Txias Cathode Backlight) technology muaj kev txwv ntawm ntau yam xim gamut vim nws qhov kev txwv ntawm cov kev txwv spectrum. Cov kev kawm zoo tshaj plaws tsuas yog li 70% ntawm NTSC cov xim gamut, thiab cov xim siab dua gamut nyhuv yuav tau them tus nqe ntau dua. nqi.
Txawm li cas los xij, kev siv ntawm cov teeb pom kev zoo xws li lub teeb pom kev zoo (LED) (Lub teeb Emitting Diode) siv lub teeb pom kev ntawm lub teeb, lub teeb emitting cheeb tsam yog ntau dua, thiab qhov xim zoo li lub cev muaj peev xwm ncav cuag 100% mus rau 130% tsis zoo li tsoos CCFL backlighting. Tib yam li 30% xim poob tshwm sim. Yog li ntawd, cov xim ntawm LED-backlit zaub ntau dua, qhov kev nthuav dav ntawm daim duab yog dlaim phaj, thiab hloov cov xim ntau dua.
CCFL backlight txuj
Lub teeb ntawm lub CCFL (txias cathode fluorescent lamp) Backlight yog Nebula roj Ne + Ar roj roj, uas muaj cov kab mob mercury vapor (ob peb mg), thiab lub cev fluorescent coated rau sab hauv txheej ntawm cov iav . Txoj haujlwm ua haujlwm yog tias thaum muaj kev kub nyhiab yog siv rau ob hnub ntawm lub teeb, muaj tsawg tsawg ntawm cov electrons hauv lub teeb yuav cuam tshuam lub electrode ntawm kev kub ceev kom tsim hluav taws xob tawm hauv tsev thiab pib tawm. Tom qab cov tshuaj mercury los yog cov pa hauv ntxig hauv lub raj raug cuam tshuam los ntawm cov electrons, cov hluav taws xob caw UV ntawm 253.7 nm. Nyob rau hauv lub teeb, lub generated ultraviolet lub teeb excites lub phosphor coated nyob rau hauv sab hauv phab ntsa ntawm lub raj kom tsim pom lub teeb. CCFL teeb lub neej yog feem ntau txhais tias yog: Nyob rau hauv ambient kub ntawm 25 ° C, nrog qhov nqi txheeb kom tsav lub teeb, qhov ci yuav txo kom pib thaum pib ntawm 50% ntawm lub sijhawm ua haujlwm ntev ntawm lub teeb lub teeb. Tam sim no, lub npe nom ntawm LCD TV backlight yuav ncav cuag 60000 teev. Lub CCFL (Txias Cathode Fluorescent Teeb) Backlight yog characterized los ntawm tus nqi qis, tab sis qhov kev ua haujlwm xim tsis zoo rau cov teeb pom kev hauv LED.
Tseem tshuav ib feem ntawm cov zaub uas siv cov teeb pom kev zoo CCFL, tab sis tam sim no tus nqe zoo dua piv rau cov lus qhia txog LED rov qab los ua me thiab me dua, thiab tus nqi ntawm LED-backlit cov lus hauv qab 18 inches yog yuav luag tib yam li CCFL saib. Nws xav pom tias hauv ib nrab xyoo thib ob, tus nqe 23-inch tseem yuav zoo ib yam li qhov sib npaug ntawm CCFL backlight display.
Tsis tas li ntawd, nws yuav tsum tau muab sau tseg tias feem ntau cov neeg saib xyuas nyob rau hauv lub khw niaj hnub no siv ob lub yees, ib qho yog lub teeb cathode fluorescent teeb thiab lwm tus yog ib qho kev lag luam ntawm LED. Txawm li cas los xij, muaj ntau tus neeg ua lub siab LCD nrog cov hlab ntaws cathode fluorescent leeg. Qhov no yog obviously tsis muaj tseeb. Nws yuav tsum paub qhov txawv ntawm qhov kev pom ntawm qhov kev pom tseeb. Qhov no yog qhov tseeb tshaj plaws los nkag siab. Kuv vam tias txhua leej txhua tus tuaj yeem nyeem zaj lus tom qab sau qoob.
