Yuav ua li cas Backlight System Ua Haujlwm ntawm LED Televisions
Pengantar
Cov TV LED (Light Emitting Diode) tau dhau los ua qhov kev xaiv zoo tshaj plaws rau ntau tus neeg siv khoom, muab kev sib xyaw ua ke ntawm cov duab zoo, kev tsim qauv zoo nkauj, thiab kev siv hluav taws xob zoo dua piv rau cov thev naus laus zis yav dhau los xws li CRT (Cathode Ray Tube) lossis plasma TVs. Ib qho ntawm cov khoom tseem ceeb uas ua rau muaj kev pom zoo dua ntawm cov TV LED yog lub kaw lus backlight. Tsab xov xwm no yuav tham txog seb lub kaw lus backlight ua haujlwm li cas ntawm cov TV LED, txij li lub tswv yim yooj yim mus rau cov thev naus laus zis tshiab tshaj plaws.
1. Lub Tswv Yim Tseem Ceeb ntawm Backlight ntawm LED Televisions
Yeej, lub vijtsam TV LED muaj lub vaj huam sib luag LCD (Liquid Crystal Display), uas tsis tuaj yeem tsim lub teeb ntawm nws tus kheej. Cov vaj huam sib luag LCD xav tau lub teeb ntxiv kom pom cov duab meej thiab ci. Qhov no yog qhov uas lub teeb backlight, lossis lub teeb tom qab, ua lub luag haujlwm tseem ceeb. Lub teeb backlight yog lub teeb pom kev zoo nyob tom qab lossis raws ntug ntawm lub vaj huam sib luag zaub, uas ci lub vaj huam sib luag LCD los ntawm tom qab, ua rau daim duab pom tau rau tus neeg saib.
2. Hom Teeb Pom Kev
Muaj ntau hom backlight systems siv hauv LED TVs, txhua tus muaj nws tus kheej qhov zoo thiab qhov tsis zoo.
a. LED Teeb Ci Ntawm Ntug
Edge-Lit yog ib hom backlight uas cov LEDs muab tso rau ntawm ntug lossis sab ntawm lub vijtsam, thiab lub teeb raug xa mus los ntawm lub teeb qhia tom qab lub vijtsam kom ci tag nrho lub LCD vaj huam sib luag.
Keuntungan:
- Tsim qauv nyias dua
- Cov nqi tsim khoom qis dua
Tsis Muaj:
- Lub teeb tsis sib xws; qee qhov ntawm lub vijtsam yuav zoo li ci dua lossis tsaus dua li lwm qhov.
- Cov qib sib piv qis dua piv rau cov kab ke Full-Array.
b. Tag Nrho-Array LED
Full-Array muab cov LEDs hla tag nrho thaj chaw tom qab ntawm LCD vaj huam sib luag, ua rau muaj teeb pom kev zoo dua thiab muaj peev xwm teeb tsa thaj chaw teeb pom kev zoo ib tus zuj zus.
Keuntungan:
- Kev sib npaug zoo dua ntawm lub teeb pom kev zoo
- Cov qib sib piv siab dua los ntawm Local Dimming technology
Tsis Muaj:
- Tsim qauv tuab dua me ntsis
- Cov nqi tsim khoom ntau dua
c. Kev Tsaus Ntuj Hauv Zos
Local Dimming yog ib qho thev naus laus zis uas feem ntau siv ua ke nrog Full-Array systems. Cov thev naus laus zis no tso cai rau qee qhov chaw ntawm lub teeb nraub qaum kom raug tua lossis txo qhov ci, nyob ntawm cov ntsiab lus tso tawm ntawm lub vijtsam. Piv txwv li, cov cheeb tsam ntawm lub vijtsam uas tso tawm cov xim dub lossis tsaus tuaj yeem muaj lawv qhov ci ci txo qis lossis kaw tag nrho kom txhim kho qhov sib piv thiab qhov tob ntawm dub.
3. Lub Teeb Pom Kev Ua Haujlwm Li Cas
Tom qab nkag siab txog cov hom backlight, cia peb tshawb nrhiav seb lub backlight system ua haujlwm li cas kom ntxaws ntxiv.
a. LED Teeb Ci Ntawm Ntug
Hauv lub tshuab Edge-Lit LED, cov LEDs raug muab tso rau ntawm ntug ntawm lub vijtsam, txawm tias nyob rau sab saud, hauv qab, lossis sab. Lub teeb los ntawm cov LEDs no ces raug coj los ntawm ntau cov ntaub ntawv reflective thiab cov phaj coj teeb kom faib lub teeb thoob plaws tag nrho lub vijtsam. Txawm hais tias yooj yim, qhov kev sib tw loj tshaj plaws ntawm lub tshuab no yog xyuas kom meej tias lub teeb sib npaug yam tsis muaj 'bleeding' lossis 'halo' teebmeem hauv qee qhov chaw ntawm lub vijtsam.
b. Tag Nrho-Array LED
Hauv lub kaw lus Full-Array LED, cov LEDs raug muab tso rau thoob plaws thaj chaw tom qab lub vaj huam sib luag LCD. Lub kaw lus no muaj lub diffuser los nthuav lub teeb LED kom sib npaug thoob plaws lub vijtsam. Vim tias cov LEDs tau faib sib npaug, kev faib lub teeb zoo dua li Edge-Lit. Ntxiv mus, lub kaw lus no txhawb nqa Local Dimming technology, uas tso cai rau kev tswj hwm lub teeb pom kev zoo dua raws li cov ntsiab lus uas tau tso tawm, ua rau daim duab zoo dua.
4. Cov Txuj Ci Tshiab Tshaj Plaws hauv Backlight System
Nrog rau kev nce qib ntawm thev naus laus zis, cov kab ke teeb pom kev zoo ntawm cov TV LED kuj tau dhau los ua qhov kev nce qib tseem ceeb. Qee cov thev naus laus zis teeb pom kev zoo tshiab siv hauv cov TV LED niaj hnub no suav nrog:
a. Cov Quantum Dots
Cov thev naus laus zis Quantum Dot siv cov semiconductor nanocrystals uas tsim lub teeb thaum raug lub zog. Quantum Dots tuaj yeem txhim kho qhov zoo ntawm daim duab los ntawm kev muab cov xim dav dua thiab raug dua. Cov kab ke backlight uas siv Quantum Dots feem ntau yog cais ua Full-Array thiab tsim los ua haujlwm ua ke nrog cov LEDs xiav los tsim cov xim zoo dua.
b. MicroLED
MicroLED yog ib lub thev naus laus zis backlight yav tom ntej uas siv cov LEDs me me heev rau txhua lub sub-pixel ntawm qhov screen. Tsis zoo li cov LEDs ib txwm muaj, MicroLED tuaj yeem tsim xim thiab lub teeb yam tsis tas yuav muaj LCD vaj huam sib luag. Txawm hais tias tseem nyob rau theem pib ntawm kev txhim kho thiab kim heev, cov thev naus laus zis no cog lus tias yuav muaj cov duab zoo heev nrog cov xim tseeb dua, qhov sib piv siab, thiab lub sijhawm teb sai.
c. MiniLED
MiniLED yog ib kauj ruam ntawm cov LEDs ib txwm muaj thiab MicroLED. Cov thev naus laus zis no siv cov LEDs me dua li cov LEDs ib txwm muaj, ua rau muaj kev tswj hwm zoo dua ntawm cov cheeb tsam teeb pom kev zoo. Nrog rau cov cheeb tsam uas tswj tau ntau dua, MiniLED thev naus laus zis txhawb nqa cov qib sib piv siab heev thiab txo cov nyhuv "halo".
5. Txoj kev
Lub kaw lus backlight yog ib qho tseem ceeb hauv lub tshuab LED TV, uas cuam tshuam ncaj qha rau qhov zoo ntawm daim duab. Txij li cov thev naus laus zis yooj yim Edge-Lit mus rau cov kab ke nyuaj dua xws li Full-Array nrog Local Dimming, thiab cov kev tsim kho tshiab tshaj plaws xws li Quantum Dots, MicroLED, thiab MiniLED, txhua qhov kev nce qib yog tsim los txhim kho lub teeb pom kev zoo thiab kev tso saib zoo. Qhov kev xaiv zoo tshaj plaws nyob ntawm txhua tus neeg siv khoom xav tau thiab nyiaj txiag. Kev nkag siab txog seb cov backlights ua haujlwm li cas thiab cov hom backlights tuaj yeem pab koj xaiv lub TV LED uas haum rau koj cov kev nyiam pom thiab kev xav tau.
