LCD Backlight Kho

Muaj ib txoj hauv kev yooj yim los sim nrog lub tshuab hluav taws xob dav dav. Ua ntej, sim lub teeb kom pom tias qhov teeb meem tshwm sim los ntawm lub teeb. Yog tias tsis yog, tsuas yog hloov lub high-voltage bar. Txoj kev yooj yim tshaj plaws yog kho qhov siab-voltage feem. Muaj ntau qhov laj thawj, xws li high-voltage coils.

Nthuav tag nrho

Tam sim no, kev ua lag luam yog tag nrho ntawm LCD saib, thiab kev saib xyuas ntawm LCD saib yog nyuaj dua li CRT saib. Kab lus no yuav piav qhia qee qhov kev paub thiab cov tswv yim ntawm kev saib xyuas LCD. Cov kua siv lead ua kua yog ib yam khoom nruab nrab ntawm cov khoom thiab cov kua. Nws yog ib qho organic compound nrog kev hloov pauv tsis tu ncua. Yog hais tias nws yog rhuab, nws yuav tshwm sim nyob rau hauv lub pob tshab kua lub xeev, thiab yog hais tias nws yog txias, nws yuav tshwm sim turbid solid lub xeev ntawm crystalline hais, uas muaj cov yam ntxwv ntawm cov kua thiab siv lead ua, yog li nws yog hu ua" kua. siv lead ua".

Lub hauv paus ntsiab lus ntawm cov kua siv lead ua kua yog tsuas yog ua kom lub zog ntawm cov kua siv lead ua kua tso rau ntawm ob lub electrodes, thiab cov txheej txheem ntawm cov kua siv lead ua kua molecules yuav hloov thaum cov electrodes tau energized, yog li hloov txoj kev kho qhov muag ntawm lub teeb kis tau tus mob thiab paub txog kev tswj cov khoom siv hluav taws xob. duab. Lub TFT kua siv lead ua vaj huam sib luag yog tsim los ntawm cov iav tiv thaiv nto, ternary xim lim phaj, polarizing phaj, FET transistor (thin film transistor) electrode tso rau ntawm iav substrate, kua siv lead ua, thiab cov electrode feem ntau tso rau ntawm iav substrate. Hauv qab txheej yog tsim los ntawm polarizing phaj, backlight phaj (lub teeb qhia) thiab backlight qhov chaw. Lub teeb yog kis tau los ntawm cov txheej hauv qab, thiab yog tswj los ntawm cov kua siv lead ua kua thiab cov phaj polarizing, thiab cov yeeb yuj duab yog tsim los ntawm kev pab los ntawm cov phaj lim.

Raws li cov qauv ntawm lub cev, cov kua siv lead ua kua ntau tuaj yeem muab faib ua hom hauv qab no: TN, STN, DSTN peb cov kua siv lead ua kua yog passive matrix LCDs, lawv cov ntsiab lus yog tib yam, qhov sib txawv yog tias lub kaum sab xis ntawm txhua cov kua siv lead ua kua molecule. txawv me ntsis. Ntawm lawv, DSTN (feem ntau hu ua" pseudo-xim") tau dav siv nyob rau hauv cov phau ntawv computer saib thaum ntxov thiab handheld game consoles, tab sis vim hais tias nws yuav tsum tau qiv lwm qhov chaw teeb pom kev zoo, nws muaj. Cov kev txwv zoo tshaj plaws, tab sis cov kev xav thaum ntxov Cov xim lossis xim LCD tsis muaj teeb pom kev zoo tuaj yeem ua rau nyias, sib dua thiab muaj zog dua. Yog tias nws tuaj yeem tsim kho thev naus laus zis, cov khoom no tseem muaj txiaj ntsig zoo rau cov khoos phis tawj thiab cov game consoles. TFT nyias zaj duab xis transistor nquag matrix LCD yog lub ntsiab siv hauv peb cov kua siv lead ua kua hnub no. Nws muaj qhov zoo ntawm cov lus teb ceev ceev, zoo sib xws, siab ci, pom lub kaum ntse ntse, thiab xim nplua nuj.

Txhua tus paub tias txhua qhov ntawm TFT kua siv lead ua kua zaub muaj peb ntu: liab, ntsuab thiab xiav. Feem ntau, cov dot pitch ntawm 15-nti TFT kua siv lead ua zaub nrog kev daws teeb meem ntawm 1024X768 yog li 0.30mm. Lub TFT kua siv lead ua zaub yog txawv ntawm CRT zaub nyob rau hauv uas nws muaj ib tug taag daws teeb meem. Daim duab zoo yog qhov zoo tshaj plaws nyob rau hauv qhov kev daws teeb meem, thiab daim duab tuaj yeem pom nyob rau hauv txoj kev nthuav dav lossis compression nyob rau hauv lwm qhov kev daws teeb meem.

Tsis tas li ntawd, nws yuav tsum raug sau tseg tias cov khoom siv ib txwm siv phom hluav taws xob los tawm cov kab hluav taws xob, uas yuav tsim hluav taws xob los ntawm kev ntaus lub vijtsam. Txawm hais tias nws cov khoom uas twb muaj lawm tau txhim kho zoo heev hauv kev siv tshuab, cov hluav taws xob puas tsuaj tsis tu ncua, tab sis nws tseem ua tsis tau. Kev kho mob radical; thiab LCD saib muaj hluav taws xob tsawg heev. Lub vijtsam zaub ntawm cov khoom siv ib txwm siv phosphors, uas tso tawm cov duab los ntawm kev tawm tsam cov phosphor nrog cov kab hluav taws xob. Yog li ntawd, qhov ci ntsa iab ntawm cov zaub yog ci dua li cov pob tshab ntawm cov kua siv lead ua kua, thiab qhov pom lub kaum ntse ntse zoo dua li ntawm TFT kua siv lead ua zaub. Nyob rau hauv cov nqe lus ntawm cov lus teb ceev, cov tsoos zaub muaj ib tug zoo heev teb ceev vim nws technical zoo.

Yuav ua li cas txiav txim lub backlight puas

Cov kua siv lead ua kua nws tus kheej tsis tawm lub teeb, thiab cov tsos thiab qhov ci ci ntawm nws cov duab yog nyob ntawm qhov kev hloov ntawm lub teeb ci ntawm lub backlight. Thaum cov kua siv lead ua kua ua haujlwm, lub teeb tawm los ntawm lub teeb rov qab dhau los ntawm cov kua siv lead ua kua los cuam tshuam cov duab cov ntsiab lus tshwm sim ntawm cov kua siv lead ua kua rau hauv tib neeg lub qhov muag. Tsuas yog tom qab ntawd peb tuaj yeem pom cov ntawv nyeem thiab cov duab tso tawm ntawm cov kua siv lead ua kua. Yog tias lub teeb rov qab puas lawm, yuav tsis muaj lub teeb, thiab peb tuaj yeem' tsis pom dab tsi nyob rau lub sijhawm no. Txawm li cas los xij, yog tias peb ua tib zoo saib lub vijtsam LCD, peb yuav pom cov duab tsaus nti ntawm lub vijtsam LCD, uas txhais tau hais tias lub teeb pom kev cuam tshuam txog lub teeb ci tawg. Yog hais tias lub backlight Circuit Court tsis zoo thiab muaj teeb meem nrog cov zaub Circuit Court, ces peb yuav pom lub teeb ci dawb ntawm qab lub LCD npo. Feem ntau ntawm kev ua tsis tiav ntawm cov kua siv lead ua kua yog cov teeb meem ntawm lub teeb rov qab los yog teeb meem ntawm cov khoom siv hluav taws xob. Qhov feem ntau yuav ua rau lub teeb ci tsis ua haujlwm yog qhov luv luv hauv Circuit Court lossis qhib Circuit Court ntawm boost coil.

Ua ntej lub zog ntawm LCD cais, saib xyuas qhov tshwm sim txhaum, seb puas muaj qhov ua txhaum saum toj no. Tom qab ntawd txuas cov kab teeb liab mus rau tus tswv tsev, tig rau ntawm cov zaub, thiab saib seb lub hwj chim ntawm cov zaub yog ib txwm ntsuab thiab seb puas muaj cov duab ntawm lub vijtsam LCD (txawm tias lub teeb rov qab puas lawm, koj yuav pom cov duab tsaus muag. los ntawm kev txheeb xyuas kom zoo).

Vim li cas lub vijtsam LCD zoo li muaj xim?

Muaj ob txoj hauv kev rau qhov pom ntawm cov xim xim. Ib qho yog tias lub vijtsam LCD yog ib feem ntawm kev ntxhov siab, ua rau thaj tsam loj ntawm cov pixels tuag. Lwm qhov yog kev sib cuag tsis zoo ntawm tus tsav screen cable.

Lub high voltage board yog dab tsi?

Lub high-voltage fais fab mov board yog lub luag hauj lwm rau muab lub hwj chim rau lub teeb ntawm lub LCD. Nws hloov lub DC low-voltage fais fab mov mus rau hauv high-frequency high-voltage fais fab mov los teeb lub teeb. Nws yog ib qho khoom siv hluav taws xob hloov hluav taws xob thiab nws yooj yim rau kev tsim hluav taws xob, yog li nws yooj yim dua rau kev puas tsuaj. Lub vijtsam tsaus yog feem ntau lub siab-voltage board tawg!

Nyob rau hauv qhov tseeb, lub high-voltage board yog ib tug switching fais fab mov, tab sis piv rau cov zoo tib yam switching fais fab mov, nws tsis muaj lub rectification thiab filtering ib feem ntawm lub tom ntej no theem, thiab tsom rau kev hloov ntawm high-frequency thiab high-voltage. Nws hloov cov hluav taws xob tsis tshua muaj hluav taws xob ncaj qha (feem ntau yog 3 ~ 14V) ntawm lub rooj tsav xwm tseem ceeb rau hauv lub siab zaus hloov tam sim no los ntawm kev hloov, thiab tom qab ntawd boosts nws los ntawm high-frequency transformer mus txog qhov voltage rau teeb pom kev zoo ntawm lub teeb. Lub hwj chim thiab cov teeb liab ntawm lub rooj tsavxwm high-voltage los ntawm lub rooj tsavxwm loj. Feem ntau, muaj ntau cov xov hlau txuas nrog lub rooj tsav xwm tseem ceeb: fais fab mov V+, lub zog hauv av G, hloov teeb liab S, thiab teeb ci ci F (qee qhov tsis yog). Thaum lub khoos phis tawj qhib, cov khoom siv hluav taws xob tau muab, lub teeb liab hloov S pib hloov oscillating circuit, lub raj hloov ua haujlwm, lub transformer ua qhov voltage nce, thiab lub teeb lub raj yog lit. Cov khoom tsis zoo ntawm lub rooj tsavxwm high-voltage feem ntau yog cov khoom siv hluav taws xob oscillating, hloov cov raj, thiab cov pob khoom siab.

Taw qhia rau tus qauv kev faib tawm interface ntawm LCD zaub

Kev hais lus theoretical, txij li cov lus qhia LCD yog cov khoom siv digital nkaus xwb, cov kev cuam tshuam digital yuav tsis hloov pauv cov analog interfaces. Txawm li cas los xij, feem ntau cov LCD zaub ntawm kev ua lag luam tam sim no siv cov teeb liab analog interfaces. Qhov laj thawj tseem ceeb yog qhov tsis sib xws ntawm cov qauv thiab cov qauv.

Tam sim no, cov txheej txheem thev naus laus zis rau digital interfaces tau maj mam koom ua ke. Ntau thiab ntau cov zaub chips muaj peev xwm txhawb nqa cov duab tso tawm digital. Graphics card manufacturers tab tom pib koom ua ke cov duab digital interfaces ntawm daim npav duab. Hauv qab no peb yuav qhia peb tus qauv video digital interface ib qho los ntawm ib qho.

① P&D

Lub Digital Plug-and-Display (P& D) tus qauv tau tsim los ntawm Pawg Neeg Saib Xyuas Hluav Taws Xob Hluav Taws Xob (VESA), tab sis thaum tus qauv tau tso tawm xyoo 1997, nws tau dhau los ua qhov cuam tshuam nrog qhov xwm txheej tiag tiag ntawm lub sijhawm. Piv txwv li, cov teeb liab teeb liab interface tau teev tseg hauv P& D tus qauv yog ntau qhov kev sib txuas uas tuaj yeem xa cov duab digital thiab analog teeb liab tib lub sijhawm. Lub teeb liab kis tau tus mob yog superfluous, thiab tsis muaj daim card chaw tsim tshuaj paus txaus siab ntxiv xws li ib tug kim thiab tsis siv interface rau lawv cov khoom. Nws yog qhov tseeb vim yog VESA' qhov ncua sij hawm ua tsis tau raws li tus qauv tsim nyog. Ntau lub tuam txhab tau sib koom ua ke tsim lawv tus kheej cov qauv nrog lawv cov neeg koom tes, uas tau ua rau qhov xwm txheej tam sim no ntawm cov qauv digital interface chaotic.

② DFP

Tus qauv DFP-Digital Flat Panel Group tus qauv yog cov qauv kev lag luam uas tau hais los ntawm Compaq. 20-pin DFP interface tuaj yeem txhawb qhov kev daws teeb meem siab tshaj plaws ntawm 1280X1024.

Lub tuam txhab loj uas txhawb nqa tus qauv DFP yog Canada ATL, uas tsim thawj daim npav duab nrog DFP interface. Tom qab ntawd, VESA kuj tau xaiv DFP interface raws li kev hloov pauv ntawm P& D tus qauv. Qhov tseeb, ntev npaum li qhov kev ua haujlwm txhais ntawm ob tus qauv kev sib txuas sib piv, koj yuav pom tias tsis muaj qhov sib txawv loj ntawm ob. Hauv kev txhais ntawm hluav taws xob kev ua tau zoo, ob qho tib si zoo ib yam. Tus qauv DFP tshem tawm cov kev xaiv kim kim thiab siv tsis tau hauv thawj P& D interface tus qauv, xws li USB, IEEE 1394, thiab lwm yam, yog li tus qauv DFP yuav tsum tau ua thaum nws ua tiav. pheej yig dua. Txawm li cas los xij, tus qauv DFP tsuas yog txhawb nqa qhov kev daws teeb meem ntawm 1280X1024, thiab qhov tsis zoo ntawm qhov kev daws teeb meem tsis txaus ua rau DFP interface tsis tuaj yeem ntev dhau.