LCD ua hauj lwm txoj cai thiab hom

LCDs ua haujlwm li cas?

Cov zaub yog tsim los ntawm ntau lab pixels. Qhov zoo ntawm cov zaub feem ntau yog hais txog tus naj npawb ntawm pixels; Piv txwv li, 4K zaub yog ua los ntawm 3840 x2160 lossis 4096x2160 pixels. Ib pixel yog ua los ntawm peb subpixels; liab, xiav thiab ntsuab-feem ntau hu ua RGB. Thaum cov subpixels hauv pixel hloov xim sib xyaw ua ke, cov xim sib txawv tuaj yeem tsim tau. Nrog rau tag nrho cov pixels ntawm cov zaub ua haujlwm ua ke, cov zaub tuaj yeem ua rau ntau lab ntawm cov xim sib txawv. Thaum lub pixels hloov pauv sai thiab tawm, daim duab yog tsim.

Txoj kev tswj hwm pixel sib txawv hauv txhua hom zaub; CRT, LED, LCD thiab hom tshiab ntawm kev qhia txhua qhov kev tswj pixels txawv. Hauv luv luv, LCDs tau teeb los ntawm lub teeb nraub qaum, thiab pixels tau hloov pauv thiab tawm hauv hluav taws xob thaum siv cov kua siv lead ua kua los tig lub teeb polarized. Lub iav polarizing yog muab tso rau pem hauv ntej thiab tom qab tag nrho cov pixels, pem hauv ntej lim yog muab tso rau ntawm 90 degrees. Nyob rau hauv nruab nrab ntawm ob lub lim dej yog cov kua siv lead ua kua, uas tuaj yeem hloov hluav taws xob rau thiab tawm.

LCDs yog tsim nrog ib tug passive matrix los yog ib tug active matrix daim phiaj. Lub active matrix LCD tseem hu ua nyias zaj duab xis transistor (TFT) zaub. Lub passive matrix LCD muaj ib daim phiaj ntawm cov neeg xyuas pib nrog pixels nyob ntawm txhua qhov kev sib tshuam hauv daim phiaj. Ib qho tam sim no raug xa mus hla ob lub conductors ntawm daim phiaj los tswj lub teeb rau txhua pixel. Lub active matrix muaj ib tug transistor nyob rau ntawm txhua pixel kev sib tshuam, yuav tsum tau tsawg tam sim no los tswj lub luminance ntawm ib pixel. Vim li no, tam sim no nyob rau hauv ib qho active matrix zaub tuaj yeem hloov mus rau thiab tawm ntau zaus, txhim kho lub sijhawm tshiab ntawm lub vijtsam.

Qee qhov passive matrix LCD's muaj dual scanning, txhais tau hais tias lawv luam theej duab daim phiaj ob zaug nrog tam sim no nyob rau tib lub sijhawm uas nws coj mus rau ib qho scan hauv thawj thev naus laus zis. Txawm li cas los xij, active matrix tseem yog cov thev naus laus zis zoo tshaj ntawm ob.

1. Twisted Nematic (TN)- uas pheej yig thaum muaj lub sij hawm teb siab. Txawm li cas los xij, TN cov lus pom muaj qhov sib piv qis, saib cov ces kaum thiab xim sib txawv.

2. Hauv Vaj Huam Sib Luag Hloov Cov Lus Qhia (IPS Panels) - uas khav theeb zoo dua qhov sib piv, saib cov ces kaum thiab xim sib piv thaum piv rau TN LCDs.

3. Vertical Alignment Panels (VA Vaj Huam Sib Luag)- uas tau pom tias yog qhov zoo nruab nrab ntawm TN thiab IPS zaub.

4. Advanced Fringe Field Switching (AFFS)- uas yog qhov ua tau zoo tshaj plaws piv rau IPS cov lus hauv cov xim luam tawm ntau yam.