Kev sib tham txog Kev Txhim Kho Qhov Zoo Ntawm Cov Hluav Taws Xob Teeb Meem

1, ci ntsa iab thiab pom lub kaum ntse ntse

Brightness yog qhov tseem ceeb ntawm cov khoom. Lub ci ci ntawm cov zaub nyob ntawm qhov kev siv ntawm cov LED thiab qhov ntom ntawm cov LEDs ntawm cov zaub. Ib co ntawm cov ntxaij uas ntsia saum phab ntsa, lub kaum sab xis ntawm lub qhov cub ntawm lub raj yas muaj qee tus cawv rau ntawm tib neeg lub qhov muag los txiav txim rau lub luminous siv. Raws li SJ / T11141-2003 tus qauv ntawm Ministry of Information Kev lag luam, ci ntsa iab yog txhais tias yog siv qhov luminous ib cheeb tsam ntawm cov yeeb yam ntawm LED. Thaum pom lub kaum sab xis yog qhov ci ntsa iab ntawm txoj kev xav mus rau ib nrab ntawm qhov kev ci ci ntawm qhov coj ntawm lub teeb pom kev ntawm LED, lub kaum sab xis nruab nrab ntawm ob txoj kev qhia txog tib lub dav hlau thiab qhov kev taw qhia ncaj qha muab faib ua ib txoj kab saib lub kaum ntse ntse thiab lub kaum sab laj saib qhov ntswg. Cov duab xim ntawm cov zaub yog ib qho xim thawj zaug, ob chav xim thiab tag nrho xim. Muaj ob hom kev kawm: sab hauv tsev thiab sab nraum zoov saib. Tseem muaj qhov sib txawv ntawm qhov kev xaiv thiab cov cai ntawm cov tsis muaj. Lub ci ci xim ntawm sab hauv xim yuav tsum yog siab tshaj 800 cd / m2, thiab qhov ci ntsa iab ntawm sab nrauv xim xim yuav tsum yog siab tshaj 1,500 cd / m2 kom paub meej tias cov duab zoo li thaum lub tshuab ua haujlwm. Nyob rau hauv xyoo tas los, cov kev yees duab tshiab rau cov teeb meem ntawm LEDs hauv substrate, epitaxy, chip thiab pob tau tawm, tshwj xeeb tshaj yog siv cov ntaub ntawv indium tin oxide (ITO), qhov ruaj ntseg thiab kom loj hlob ntawm kev nthuav dav txheej txheem technology thiab txheej txheem, li ntawd cov kev ua haujlwm zoo ntawm LED muaj Greatly txhim kho. Tam sim no, feem ntau sab nraum zoov puv npo cov ntxaij vab tshaus muaj peev xwm muaj txoj kab rov tav dua sab nraud tshaj 120 ° thiab ib txoj kab saib ntsug dua 45 °. Thaum twg cov pixel spacing yog 16 hli, xim tas nrho xim dawb tshuav ci ci siab tshaj 6,000cd / m2, thiab pixel spacing yog 20mm. Cov lus dawb tshuav ci ci tuaj yeem tuaj yeem ncav tau ntau dua 5,500 cd / m2, thiab cov khoom yuav ua haujlwm nyob ib ncig ntawm lub moos ntawm ib cheeb tsam.

Qhov luminous siv ntawm cov hluav taws xob LED yog nyob ntawm qhov ua hauj lwm tam sim no ntawm lub raj. Thaum tam sim no, cov kev siv ntawm 1W LED raj no feem ntau yog 350mA. Nce kev ua hauj lwm tam sim no yuav ua rau kom muaj kev siv lub raj hauv cov raj LED, tab sis nws yuav ua rau cov hluav taws xob tub taws kub kom sov. Accelerating lub teeb lwj ntawm LED raj yuav ua tau rau tag nrho lub neej ntawm LED zaub, thiab LED raj tsis tau hloov ntau heev. Yog li, ib zaug ib txhia ntawm cov hlab ntsha LED muaj ib lub neej kawg ntawm ib qho screen, nws txhais tau tias cov zaub. Qhov kawg ntawm kev tshuaj ntsuam lub neej. Nyob rau hauv ib qho kev txiav txim zoo, lub neej ntawm LED raj txiav txim siab lub neej ntawm cov zaub. Lub neej ntawm txoj hlua hluav taws xob (LED tube) feem ntau yog lub neej thaum lub luminous intensity yog attenuated rau tus nqi pib ntawm 50%. Peb pom nyob rau hauv kev tshuaj ntsuam tias tsoomfwv qhov kev npaj yuav khoom tam sim no yuav tsum tau tus neeg muag khoom los muab kev tshuaj ntsuam xyuas zoo ntawm daim duab. Vim tias nws yog qhov kev ruaj ntseg zoo ua ntej qhov kev sib tw, kev kuaj tshuaj tau xa los ntawm tus neeg muag khoom raug xaiv thiab cov qauv txo. Qhov zoo ntawm cov khoom no yog tseeb kuj zoo. Tam sim no tsoom fwv muab khoom muaj zoo raws thiab nqi rau cov khoom. Tus nqi feem ntau yog rau 45 ntsiab lus ntawm qhov feem pua. Yog hais tias qhov zoo tsis txawv, qhov nqi plays lub luag haujlwm tseem ceeb. Cov khoom lag luam tam sim no, tsis hais seb qhov khoom zoo puas tuaj yeem ua tau, yuav tsum ua tiav thiab txaus siab, thiab tshawb xyuas hauv tsev yog qhov nyuaj. Tsuas yog tom qab txais qhov kev sib tw, lub tsev yuav khoom yuav nrhiav tau. Rau qee tus neeg txuas khoom uas tau txais qhov kev sib tw ntawm tus nqi qis, nws yog ib qho yooj yim los hloov cov yeeb nkab uas muaj yeeb nkab zoo. Yog li ntawd, thaum nriav cov khoom muag, sim xaiv cov chaw tsim khoom nrog lub npe zoo thiab lub npe nrov. Thaum ua tau, tus neeg muag khoom yuav tsum tau muab cov khoom hluav taws xob los ua kom cov LED tub thiab cov lus qhia.

2, tsis meej thiab meej

LED zaub uniformity muaj peb cov yeeb yam: pixel brightness uniformity, zaub module brightness uniformity thiab module brightness uniformity. Txij li thaum lub teeb pom kev ntawm pixel yog qhov teeb meem, lub LED raj raug tshem tawm ntawm qhov kev tshuaj ntsuam, qhov txheej txheem yog cov nyuab, thiab lub raj yuav raug puas ntsoog. Yog li ntawd, qhov ci ntawm cov qauv module los yog tus module feem ntau raug xaiv los ua qhov ntsuas qhov ntsuas. Module brightness uniformity hais txog qhov ci qhov sib npaug ntawm cov khoom nyob hauv tib qho screen, uas yog ib qho tseem ceeb tshaj plaws los ntsuas tus tshaj tawm thiab pom ntawm cov lus.

Txoj kev ntsuas no yog siv cov yeeb yaj duab kos tawm 9 tso rau hauv cov duab khwb puv npo (9 saib cov kab kos yog xaiv nyob hauv lub xeev xim dub), thiab tso tawm ib co xim thawj xim hauv puv npo thiab qib siab tshaj plaws, thiab ntsig txog kev ntsuas nrog ib tus kws tshawb xyuas xim. Qhov ci ntaiv ntawm lub cuaj ntawm cov duab yeeb yam, qhov kev sojntsuam theej qhov muag yuav tsum tsis pub tsawg tshaj 16 uas yog pixels, thiab tom qab ntawd tus lej nruab nrab ntawm kev xam pom, raws li qhia hauv formula (1).

LJ = × 100% (1)

Qhov twg LAV = Li / 9

Los ntawm peb qhov kev ntsuam xyuas cov ntxiab khoom sib txawv, nrog rau cov ntxiab hauv tsev thiab cov ntxaij dav hlau sab nraud, ntau yam pib ua yeeb yam tseem muaj peev xwm ua tau raws li tus qauv tsim nyog, mus txog C-qib. Tom qab cov kev sim thiab qhov kev tshuam ntawm kev ntsuam xyuas, kev hloov hauv lub teeb lwj thiab qhov muag kho qhov muag ua rau teeb meem tsis muaj teeb meem. Feem ntau peb pom tau tias tom qab lub sijhawm siv cov zaub, yuav muaj tsis sib xws, xws li "hmoov av" thiab "mosaic". Lub ntsiab yog vim li cas rau qhov kev tsis sib haum xeeb yog tias qhov kev ua tau ntawm cov hluav taws xob LED yog inconsistent, mas nrog rau kev siv lub teeb. Inconsistent, inconsistent optical axes, inconsistent xim coordinates, inconsistent teeb siv tis curves ntawm ntau hom xim, thiab inconsistent teeb lwj tom qab lub sijhawm. Tam sim no, muaj ob txoj kev los daws cov teeb meem ntawm LED tube kev ua tsis tau: Ua ntej, los ntawm kev ntxiv ntawm qhov muag ntawm LED tube specifications, txhim kho cov cai ntawm LED tube kev ua haujlwm; thib ob, txhim kho cov duab los ntawm kev hloov kho tom qab. Lub uniformity ntawm qhov screen. Peb ntseeg hais tias kev ua ntej kev faib tawm yog ib qho txiaj ntsim zoo dua los kho qhov kev daws teeb meem. Kev kho ntxiv tom qab yuav ua rau cov hluav taws xob ua hluav taws xob ua haujlwm dhau los, thiab muaj qee qhov tsis xws, xws li tsis pom kev ntawm qhov muag, tsis muaj lub teeb ntom ntu, tsis muaj teebmeem lub teeb meem, thiab tsis zoo los ntawm kev ua haujlwm. Etc., nws tsis tuaj yeem muab tshem tawm los ntawm kev kho tom qab.

LED zaub txheem txheem tsis qhia lub ntsiab txhais, tab sis lub pixel suab txhais. Lub me pixel suab, lub siab dua qhov txhais. Niaj hnub no, feem ntau siv hauv tsev puv npo pauv cov duab pixel pitches 2.5, 4, 4.75, 6mm, thiab lwm yam., Thiab cov duab kos qis tshaj 3 qho thiab ib lub pixel suab 6, 7.62, 10, 12 hli, thiab qhov zoo li. Vim yog cov txheej txheem tsim ntawm lub vijtsam duab thiab qhov kev pom ntawm LED raj, qhov pixel tsis yog qhov ntsuas rau kev txiav txim siab lub ntsiab lus, thiab nws muaj feem xyuam nrog ntau yam xws li kev daws teebmeem, kev tsis sib luag, kev ci ntsa iab, qhov sib txawv, thiab cov zoo li . Los ntawm tsuas yog txo lub cev pixel suab los txhim kho qhov kev daws teeb meem, txawm hais tias lub ntsiab lus yuav kho kom muaj qee yam, vim yog qhov khoom ntawm cov khoom tso tawm, tsuas yog cov saum toj no ntau cov cim ntsuas tau raws li qhov yuav tsum tau, thiaj li yuav tau txais ib daim duab zoo clarity.

3, tso saib pixel

Pixel tawm ntawm kev tswj yog muab faib rau qhov chaw dig muag thiab qhov chaw kaj. Lub qhov muag tsis pom kev, uas yog, qhov kho raws, tsis pom kev thaum nws xav tau kev kaj, thiab nws yog hu ua hnoos qeev; nws yog ib txwm kaj, thiab thaum nws xav tau unlit, nws yog ib txwm zes, thiab nws yog hu ua ib qho chaw kaj lug. Rau monochrome thiab ob-xim, nws zoo dua kom to taub tias rau txhua xim, muaj ib qho RGB teeb tawm ntawm kev tswj, peb xav tias qhov pixel no tawm ntawm kev tswj. Pixel tawm ntawm kev tiv thaiv tus nqi faib rau hauv puv npo pixel tawm ntawm kev tswj thiab lub regional pixel tawm ntawm kev tswj. Qhov tawm ntawm kev tswj cov pixel uas tsis muaj peev xwm sib npaug yog sib npaug ntawm qhov sib npaug ntawm cov teeb meem dig muag ntawm tag nrho cov npo rau cov naj npawb ntawm cov pwm ci hauv tag nrho lub vijtsam thiab cov pixels hauv tag nrho lub vijtsam. Tsis tas li ntawd, yuav kom tsis txhob muaj kev pixels tawm ntawm ib cheeb tsam, tus txheej txheem tawm tswv yim "thaj tsam pixel khiav tawm tus nqi", uas yog, qhov sib piv ntawm tus naj npawb ntawm cov pixels tawm ntawm tag nrho cov thaj chaw pixels (piv txwv li, 10,000) nyob rau thaj tsam 100 × 100 pixel. Qhov ntsuas no yog ntaus nqi hauv SJ / T11141-2003 "General Specification for LED Display" rau qhov yuav tsum tau ua kom "tsis muaj kev sib cais pixels", uas yog yooj yim thiab intuitive.

4. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb

Vim tias cov ntaub ntawv tuaj yeem siv rau ntau lub sijhawm, muaj qee txoj kev nyab xeeb rau cov khoom. Cov kev nyab xeeb ntawm kev nyab xeeb loj tshaj plaws uas tau hais los ntawm cov qauv muaj xws li grounding, lub ntiaj teb tawm mus tam sim no, hluav taws xob thiab kub sawv. Ntawm lawv, cov av tawm mus tam sim no thiab lub zog hluav taws xob yog qhov tseem ceeb tshaj plaws kev ruaj ntseg ntsuas. SJ / T11141-2003 "General Specification for LED Display" 5.4 taw qhia tias tus txheej txheem hais tias lub ntiaj teb tawm ntawm cov khoom yuav tsum tsis pub tshaj 3.5 mA ntawm 1.1 zaus qhov khoom siv fais fab tuag; lub hwjchim ua haujlwm yuav tsum yog nyob ntawm txoj haujlwm ntawm lub hwj chim. Tuav kev ntsuas ntawm qhov 1,500 V, 1 min yam uas tsis muaj kev sib tawg.

Tus nqi ntawm LED sab nraum zoov cov duab yog ntau dua qhov nyiaj ntawm sab hauv tsev. Qhov chaw hauv tsev sab nraud muaj tsawg tshaj plaws rau cheeb tsam ntawm adaptability, thiab cov khoom siv sab nraud muaj ntau tshaj li qhov yuav tsum tau ua rau kev hloov mus rau ib puag ncig. Vim tias cov cheeb tsam sib txawv thiab qhov chaw sib txawv, qhov kev lag luam sab nraud yuav tsum tau muaj peev xwm tiv thaiv cov teeb meem ntawm qhov ntev, uas yog, nws muaj peev xwm tiv taus cua, dej nag thiab av qeeg, thiab nws tuaj yeem siv feem ntau nyob hauv siab thiab tsis kub qhov chaw . Txhua yam ntawm ib puag ncig teeb meem saum toj no yuav ua rau tus qauv raug kaw ntawm qhov pom ntawm LED coj los ua kom puas tsuaj rau qib siab. Cov dej nag thiab cov plua tshauv tuaj yeem ua rau sab hauv lub voj voog, xws li khib nyiab khib nyiab ntawm cov nag thiab hmoov av nyob rau hauv qhov kev siv hluav taws xob. Hli xeb xeb ntawm cov tawv ntoo thiab cov hlau hluav taws xob ua tub rog. Yog li no, qhov kev ntsuas tsis zoo ntawm qhov chaw nruab ntug tsis yog qhov tseem ceeb.

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