Nrog rau kev txhim kho thiab kev siv cov ntxaij vab tshaus LED sab hauv tsev ntau thiab ntau dua, tsis hais nyob rau hauv qhov chaw hais kom ua, chaw saib xyuas lossis txawm tias lub studio, koj tuaj yeem pom tias LED zaub screen tau siv dav. Txawm li cas los xij, kev txiav txim siab los ntawm tag nrho cov kev ua tau zoo ntawm LED zaub system, cov lus qhia no puas tuaj yeem ua tau raws li qhov xav tau ntawm cov neeg siv? Puas yog cov duab tso rau ntawm cov duab LED no ua tau raws li tib neeg lub zeem muag? Cov LED no puas tuaj yeem tiv taus qhov sib txawv ntawm lub koob yees duab? Qhov kev sim ntawm lub koob yees duab los ntawm ntau lub kaum ntse ntse? Cov no yog tag nrho cov teeb meem uas yuav tsum tau xav txog rau LED zaub. Hauv qab no, kuv yuav txheeb xyuas ntau yam tseem ceeb (nrog rau tus nqi refresh, qib grey, thiab lwm yam) uas cuam tshuam rau LED cov nyhuv.
1. Refresh zaus ntawm LED zaub (visual refresh zaus)
"Visual refresh npaum li cas" yog hais txog lub vijtsam hloov tshiab, feem ntau qhia hauv Hertz (Hz). Feem ntau hais lus, qhov pom kev ua kom pom tseeb yog siab dua 3, 000 Hz, uas yog qhov ua tau zoo ntawm LED zaub. Qhov siab dua qhov pom kev ua kom pom tseeb dua, qhov ruaj khov ntawm qhov screen zaub, thiab qhov me dua qhov pom kev flicker. Qhov qis "visual refresh npaum li cas" ntawm LED zaub screen muaj kev cuam tshuam ntxiv rau cov kab txaij kab rov tav tshwm sim thaum tua thiab thaij duab, tab sis kuj muaj cov duab zoo ib yam li kaum tawm txhiab lub teeb nyem tib lub sijhawm, uas yuav ua rau tsis xis nyob thaum saib. los ntawm tib neeg lub qhov muag, Thiab txawm ua rau lub qhov muag puas.
Qhov thib ob, qib grey ntawm LED zaub
"Grey Level" yog hais txog cov xim hierarchy ntawm ntau yam xim nrog txawv kev hloov ntawm cov xim tsaus thiab ci tshaj plaws. Feem ntau hais lus, qib grey yog siab dua 14 khoom, uas yog, muaj tsawg kawg yog 16,384 xim hierarchies. High-kev ua tau zoo LED zaub. Yog hais tias tus naj npawb ntawm cov qib grey tsis txaus, cov xim xim tsis txaus lossis cov xim gradient tsis zoo txaus, thiab cov xim ntawm cov vis dis aus tsis tuaj yeem pom tag nrho. LED zaub nyhuv txo qis heev. Qee qhov kev ua haujlwm qis LED tuaj yeem kuaj pom nrog pom tseeb xim thaj chaw faib hauv qab lub kaw ntawm 1/500s. Yog tias peb nce lub shutter ceev, xws li 1/1, 000s lossis 1/2,{12}}s, qhov xwm txheej yuav hnyav dua. pom tseeb.
Thib peb, dab tsi cuam tshuam rau qhov refresh zaus thiab qib grey ntawm LED zaub
Peb paub ntau yam tseem ceeb ntawm LED zaub, xws li LED switching fais fab mov, LED tsav nti, LED teeb hlaws, thiab lwm yam. Rau qhov refresh zaus thiab grey theem ntawm LED zaub, LED tsav nti ncaj qha txiav txim siab qhov pom kev tshiab zaus ntawm LED zaub, Kev ua haujlwm ntawm grey nplai. Ntawm cov chips LED tsav tam sim no, thev naus laus zis tshiab yog "ScrambledPWM (S-PWM) technology". S-PWM thev naus laus zis yog kev txhim kho ntawm cov qauv pulse width modulation (PWM) technology. Ob peb lub sijhawm luv luv kom nce qhov pom kev hloov tshiab tag nrho. Txhawm rau piav qhia ntxiv, S-PWM thev naus laus zis tau tsim los rau tiam tshiab ntawm LED tsav tsheb chips tuaj yeem suav ib zaug ib lub thav duab (LED tuag ON → LED tuag OFF) thiab tawg mus rau ntau qhov suav ntawm qhov nruab nrab. , Thiab txhua qhov sib faib aliquot tuaj yeem tswj hwm qhov qub On / Off piv ua ntej tawg.
S-PWM thev naus laus zis muab ntau hom kev suav, yog li nws tuaj yeem ua kom cov duab refresh tus nqi mus txog 64 npaug. Yog tias koj hloov mus rau S-PWM txhawm rau ua kom cov duab refresh npaum li cas, koj tuaj yeem yooj yim nce qhov pom ntawm qhov pom los ntawm 64 zaug nrog lub moos qis (xws li 5MHz), thiab nws tuaj yeem ncav cuag ntau dua 4,800Hz. Piv nrog rau cov yeeb yaj kiab dav dav, qhov pom kev ua kom pom tseeb yog tsawg kawg 10 npaug siab dua. Nws kuj tseem tuaj yeem zam cov teeb meem ntawm kev cuam tshuam ntau zaus electromagnetic cuam tshuam (EMIissue), overshoot thiab undershoot.
LED zaub ntawm S-PWM tsav nti yog yees duab nrog lub siab ceev shutter ntawm lub koob yees duab digital, thiab tseem tsis tau muaj kab rov tav dub scan kab thiab xim thaj tsam faib. Nws qhov pom kev refresh npaum li cas thiab qhov kev ua tau zoo ntawm grey nyob deb tshaj li LED cov ntxaij vab tshaus siv cov kev hloov-hom tsav tsheb chips.
Qhov zoo tshaj plaws LED tsav nti nti, built-in S-PWM thev naus laus zis, ua rau lub zog tshiab mus txog 3840Hz, qib grey tuaj yeem ncav cuag 16bit, thiab kab rov tav dub scan kab thiab xim thaiv kev faib tawm yuav tshwm sim thaum tua nyob rau hauv cov xwm txheej siab. - ceev shutter.
