Kev tsom xam ntawm cov laj thawj rau lub txaws screen ntawm LCD LCD npo
LCD (Ua Kua Crystal Zaub) LCD Screen tsuas yog tsim ntawm LCD panels, backlight modules, thiab tsav tsheb ci. Nws li qub kev ua haujlwm yog nyob ntawm kev sib koom tes sib koom tes xws li cov teeb meem hluav taws xob ruaj khov, thiab muaj cov electro- kev kho qhov muag.
Hauv cov ntawv thov engineering, LCD LCD cov ntxaij vab tshaus "}} kub,} kub tawm, ua kom muaj kev cuam tshuam ntawm kev cuam tshuam, kev tswj hwm kev sib cais lossis ib puag ncig kev cuam tshuam lossis ib puag ncig kev cuam tshuam.
Hom teeb meem no tsis tsuas yog cuam tshuam rau cov neeg siv kev paub, tab sis kuj tseem tuaj yeem ua rau muaj kev ntseeg tau, lossis cuam tshuam nrog kev ua haujlwm tag nrho EMC. Kab lus no yuav cuam tshuam cov ua rau LCD txaws Screens los ntawm ntau qhov ntev ntawm cov qauv kho vajtse, cov khoom siv tsav tsheb, cov software teeb tsa thiab ib puag ncig.
1. Kev tsom xam ntawm kho vajtse - muaj cov laj thawj
Cov zaub ua yeeb yam ntawm LCDs tau nyob ntawm kev sib koom tes ua haujlwm ntawm ntau yam sab hauv. Ib zaug ib feem ntawm cov haujlwm yog qhov txawv txav, nws yuav ua rau pom "txaws screen" kev ua tau zoo. Cov hauv qab no yuav soj ntsuam ob peb qhov tseem ceeb subsystems ib qho ntawm ib tug.
1. Backlight System Ua tsis tiav
Lub lcd npo nws tus kheej tsis emit teeb, thiab nws cov duab yuav tsum tau txais lub backlight kom muab ci ci. Niaj hnub nMDs niaj hnub feem ntau siv Bu Backlights, thiab cov kev ua txhaum xws li muaj xws li:
Kev Tsav Tsheb LED Tsav Tsheb tsis ruaj khov: yog tias lub voltage fluming thiab lub PWM Dimming zaus tsis meej los ntawm tib neeg lub qhov muag thaum nws qis dua 150Hz), nws yuav ua rau muaj kev nyuaj siab;
Lub backlight sawb yog puas: ib ntu ntawm LED ua tsis tiav, tag nrho Backlight cuam tshuam, ua rau muaj kev sib txig sib tsoo lossis kev tsaus ntuj hauv zos;
Cov teeb meem loj inverter teeb meem (thaum Ntxov CCFL LCD): Tsav tsis zoo tuaj yeem ua rau lub teeb pom kev thiab tawm mus.
2. Kev laus lossis kev puas tsuaj rau LCD vaj huam sib luag
Lub LCD Vaj Huam Sib Luag yog qhov tseem ceeb ntawm cov duab rov qab, thiab cov teeb meem feem ntau xav txog hauv:
Kev tsis pom zoo lossis xau ntawm cov kua siv ua kua crystal: ntev- TSHEM Siv Siv lossis sab nraud cuam tshuam ua rau cov kua siv tsis ruaj khov;
TFT tus neeg tsav tsheb array qhov txawv txav: qee qhov TFT Pixels tsis tuaj yeem tsav tau raug, ua rau thaj chaw rau flicker;
Polarizer Peeking lossis Kev Laus: Ua rau muaj kev tsis ncaj lossis tsis ruaj khov, uas tau pom tias yog flashing.
3. Tsis muaj kev sib cuag nrog txoj kev sib txuas
Feem ntau siv nyob rau hauv cov cuab yeej nyob rau hauv ntev - tsis siv lossis kev co ib puag ncig:
FPC cable xoob: Qhov muag muag ntawm LCD module thiab cov thawj coj tswj lub ntsiab yog desoldered lossis zoo soldered
Kev cuam tshuam nrog kab mob LVDs: Yog tias qhov siab - Ceev Xwm Txheej Txheem lossis thaiv tsis zoo, nws yuav ua rau cov duab tsis ruaj khov;
Lub interface qhov me nyuam hnav: Tom qab ntau dua ntais ntawv {}} Ins thiab unplugging cheem tsis kam thiab lub teeb liab yog attenuated.
Raug tshwm sim yog thaum cov khoom siv tau maj mam shaken, lossis lub vijtsam nyem, lossis tom qab re -} {0} -}}} Kuv yog rov qab ua ib ntus.
4. Lub zog siv hluav taws xob thiab kev tswj hwm circuit Court yog qhov txawv txav
Lub zog hluav taws xob voltage tsis ruaj khov: LCD vaj huam sib luag yuav tsum muaj ntau voltages (Vggl / VGD / AVS, thiab lwm yam). Yog tias LDD / Booset Circuit Court yog puas, nws yuav cuam tshuam ncaj qha rau kev tsav tsheb ruaj khov;
Sij hawm tswj kev tswj nti (ua yeeb yam) txhaum: Lub luag haujlwm rau moos / Cov ntaub ntawv synchronization. Thaum cov kauj ruam ploj, qhov screen yuav dhia dhia thiab tawm mus;
Main tswj kev txhim kho Soheating: Tom qab tus tsav nti nti kub tshaj 85 degree, nws yuav nkag mus rau hauv lub xeev tiv thaiv lossis dub ua haujlwm rau lub sijhawm luv luv.
Thaum lub sijhawm ntsuas, nws tau pom tias tus ton tus kub nce los ntawm 10℃thiab qhov ruaj khov txo li 7%; Yog tias cov qauv cua sov dissipation yog neeg pluag, ntev}}}} kev ua haujlwm siab yuav ua rau muaj qhov tshwm sim ntawm kev tawg.
5. Hwj chim -}} thiab nqis sij hawm sij hawm tswj kev txawv txav
Tsav Tsheb Tsav Tsheb IC yog qhov rhiab heev rau Hwj chim -} {{} {down tus cwj pwm:
Lub hwj huam muab hluav taws xob xws li avddd / VGGT / VGG tsis tau pib lossis kaw raws li cov lus qhia tshwj xeeb, ua rau tsis ua haujlwm sab hauv;
Cov hluav taws xob sawv dhau qeeb qeeb thiab cov IC tsis tuaj yeem paub txog cov khoom siv hluav taws xob zoo li qub;
MCU tseem tso tawm cov teeb liab tom qab fais fab -}} down, ua rau cov ntaub ntawv rov qab- sau lossis rooj vag mistrive.
6. Synchronous Kos Npe Txawv (VSync / HySync / de)
Cov Txheej Txheem Synchronous Cov teeb meem tsis ncaj qha rau kev tsis meej pem hauv duab Refresh Defres:
MCU Kev pib pib ua tsis tau tejyam, VSync tau daig (qib siab tsis hloov);
Lub teeb liab de yog ua tau zoo tsis tu ncua thiab qhia kom khov;
Tus maub los pib dua ua tsis tiav, cov duab duab yog misaligned lossis gsayscale kev zam.
2. Kev tsom xam ntawm cov laj thawj ntawm cov txheej txheem software
Ntxiv rau cov khoom siv kho vajtse, LCD cov lus tseem cia siab rau software {{}}}}}} ™ txheej txheej tswj, pcs.
1. Daim duab daim npav tsav tsheb yog tsis sib xws
Lub operating system tsis phim tus tsav npav: Qhov sib piv cov neeg tsav tsheb npav tsis raug muab kho dua tom qab kho dua cov txheej txheem ua haujlwm tsis raug;
Tsav tsheb cache tsis sib haum: Thaum ntau yam screen tawm los yog cov kev daws teeb meem nquag hloov, kev nco lub cim yuam kev ua rau lub vijtsam dhia;
Cov xim tob / zaus muaj kev ua txhaum: yog tias qhov yuam kev tau teem rau 30hz tso zis, nws yooj yim heev rau muaj "txaws vijtsam" lub siab.
Piv txwv li, thaum txuas rau lub TV sab nraud sab hauv hauv lub Windows system, yog tias tus nqi remes raws li tau teeb tsa rau 24Hz los ntawm lub kaw lus, lub vijtsam LCD yuav nyem ntau zaus, cuam tshuam rau kev pom kev pom.
2. Embedded System software teeb tsa yuam kev
Xws li cov terminals ntse, ntawm - Pawg Tswjhwm Saib Xyuas thiab lwm yam.
Kev pib ua haujlwm lub sijhawm ua yuam kev: piv txwv li, vSync thiab de teeb tsis tswj kom raug;
Kev sib txuas lus I2C tsis ruaj khov: Screen parameter nyeem yuam kev cuam tshuam rau GAMMA nkhaus thiab Backlight Tswj;
Dynamic Dimming algorithm yuam kev: Tsis siv neeg kaj lug hloov kho cov kev ua yuam kev tuaj yeem ua rau nquag backlight pooj jumps.
Lub synchronous configuration thiab sij hawm tawm ntawm cov tshuaj ntsuam xyuas feem ntau siv cov ntsuas ntsuas hluav taws xob feem ntau yog txhais tau tias daws teeb meem xws li.
3. Firmware lossis cov haujlwm ua haujlwm
Qee Linux lossis Android Kernel versions muaj cov kab tsis tiav nyob rau hauv cov qauv tsav tsheb uas yog:
Qee qhov nti nti version ntawm lub platform platform muaj kev sib tw thaum lub backlight pwm pwgm synchronous kev tswj hwm yog tswj hwm, ua rau muaj kev sib quas ntus;
Nyob rau hauv cov firmware ntawm qee cov tuam ntxhab cov tsev lag luam, qhov nkhaus dim tsis yog linearly tau npaj, ua rau muaj teeb meem loj ntawm qhov ci qis.
3. Kev siv ib puag ncig thiab cov khoom lag luam
Txawm hais tias LCD screen raug kaw hauv ib qho qauv ruaj, qee qhov chaw ib puag ncig tseem tuaj yeem ntxias lossis exacerbate qhov teeb meem screen:
1. Kev cuam tshuam hluav taws xob hauv hluav taws xob (EMI): muaj zog Electromagnetic teb xws li cov xov tooj cua sib txuas, ua rau lub xov tooj cua sib kis, ua rau lub cim ntsuas kev sib kis, ua rau lub ntsej muag ntsuas lossis deformation;
2. Electrostatate tawm (ESD): hluav taws xob hluav taws xob sau cia hauv ib qho chaw qhuav, thiab tawm tam sim ntawd thaum nws nkag mus rau hauv kev sib cuag lossis sib tham, ua rau kev tswj hwm hluav taws xob poob rau ib lub sijhawm luv;
3. Cov av noo thiab kub hloov pauv: hnyav kub (<0℃ or >60 degree) lossis cov av noo hloov yuav cuam tshuam kev npaj ua kua siv lead ua cov molecules, thiab tshwm sim ib ntus;
4. Fais Fab hloov pauv: Mains tsis ruaj khov, tsis muaj av hlau lossis lub zog tsis zoo kuj tseem ua rau pom cov duab sib quas sib deev tsis sib deev lossis cov flickering.
Txawm hais tias ib puag ncig cov khoom siv rau ib qho kev faib ua feem me me ntawm LCD txaws cov teeb meem, lawv tseem yuav tsum tau txiav txim siab nyob rau hauv high {}}} kev kub ntxhov lossis muaj ntees.
Qhov "txaws" teeb meem ntawm LCD cov ntxaij npog kho vajtse, cov chaw tsav tsheb, thiab yog ib qho kev sib tw hnyav hauv cov khoom lag luam tshuab nqus. Tsuas yog los ntawm kev pib los ntawm cov kev xav thiab kev txheeb xyuas txheej txheej thiab txheej txheem tsav tsheb kom ruaj khov, peb tau nrhiav qhov teeb meem ntawm qhov teeb meem.
Thaum lub sijhawm tsim qauv theem, lub sijhawm ua sijhawm rau kev sib cais thiab ua kom muaj kev sib cav sib ceg ntev thiab ua haujlwm ntev thiab ua haujlwm nyob ruaj khov ntawm LCD system.
