Ib txoj haujlwm tseem ceeb hauv kev tsim kom muaj lub siab nyiam ntawm daim duab thiab yees duab los ntawm tus projector ua si los ntawm qhov screen. Yuav kom txiav txim siab nws txoj kev xaiv, koj yuav tsum paub txog txhua yam, qhov ntau thiab tsawg thiab cov ntaub ntawv ntawm txheej.
Yuav ua li cas xaiv ib qho screenable portable rau ib lub projector rau ib lub kos?
Yog li, peb yuav xaiv qhov screen rau ntawm ib lub kos rau lub projector, relying nyob rau theem ua ke. Thiab nyob rau ntawm thawj ntawm lawv peb yuav tsum txiav txim siab rau hom tshuaj ntsuam peb xav tau.
Yog tias koj npaj yuav siv qhov kev tshuaj ntsuam tshwj xeeb tshaj li nyob rau hauv ib chav, koj tuaj yeem saib siab rau ntawm cov ntawv ntxig uas ntim rau sab nraud thiab phab ntsa. Tab sis yog tias koj xav tau kev nthuav tswv yim los ntawm ntau qhov chaw, koj xav tau ib qho khoom txawb nqa tawm ntawm ib qho chaw.
Tej zaum, tej zaum koj yuav xav tau ib qho screen nrog thim rov qab, thaum lub projector nyob tom qab nws. Xws li cov ntxaij vab tshaus uas tsis tshua muaj teeb pom kev zoo, qhov teeb meem ntawm lub tshuab raj thiab cov khoom siv tas yuav raug muab zais los ntawm cov neeg saib xyuas thiab yuav tsis cuam tshuam nrog lawv.
Qhov thib ob kauj ruam hauv kev xaiv ib qho screen rau lub projector yog txiav txim siab qhov loj me me. Cov kauj ruam no yog lub luag haujlwm, thiab ntawm no nws yog ib qho tsim nyog yuav tsum tau ua raws li cov cai no:
- Qhov kev tshuaj ntsuam yuav tsum tsis txhob dav dua 1/2 ntawm qhov kev ncua mus rau cov neeg saib hauv thawj kab;
- Qhov kev tshuaj ntsuam yuav tsum tsis txhob muaj ntau dua li ntawm 1/6 ntawm qhov kev ncua deb rau cov neeg pom nyob rau hauv lub xeem kab;
- Qhov screen yuav tsum tsawg kawg yog 1/8 ntawm qhov kev ncua deb ntawm cov neeg pom nyob rau hauv lub xeem kab;
- Qhov qis ciam ntawm qhov kev tshuaj ntsuam yuav tsum tsis txhob poob qis dua 125 cm hauv av, kom tag nrho cov neeg saib yuav pom daim duab kom meej.
Lub sijhawm tom ntej yog xaiv hom tshuaj ntsuam. Nyob ntawm tus projector, cov duab muaj ib qho piv txwv - qhov dav thiab dav dav. Rau overhead projectors nrog ib hom ntawv square, daim ntawv tshuaj ntsuam yuav muaj 1: 1 piv piv. Yog tias koj muaj lub tshuab raj multimedia uas pom hauv video hom, qhov piv txwv ntawm qhov screen yuav tsum yog 4: 3.
Rau cov phiaj xwm xaub nrog ib hom ntawm 35 hli, nam piv ntawm qhov screen yuav 3: 2. Zoo, rau saib cov yeeb yaj kiab hauv DVD thiab lwm hom HDTV, cov voj voos yuav tsum yog 16: 9.
Qhov tseeb, kom tau qhov zoo tshaj plaws qhov koj yuav tsum tau siv ib qho screen zoo ib yam li cov duab hom. Ua ib qho screen universal yob nrog ib hom 1: 1 thiab 4: 3. Piv txwv, muaj ib qho screen rau lub projector ntawm ib qho chaw ntsuas 200 x 200 cm, koj tuaj yeem ua rau lub yob mus rau ib qhov siab los ntawm kev kho hom ntawv ntsuas kom pom duab.
Thaum kawg, qhov ntsuas tseem ceeb kawg rau qhov kev xaiv ib lub vijtsam projection rau ntawm ib lub kos yog daim ntaub thiab txheej khoom rau lub vijtsam projector. Raws li kev muaj peev xwm ntawm cov khoom ua kom pom thiab diffuse lub teeb nkag mus rau nws, qhov ci ntawm cov duab yuav txawv.
Cov ntaub ntawv xaiv rau qhov screen yog nyob ntawm qhov laj thawj ntawm nws txoj kev siv. Tab sis nyob rau hauv txhua rooj plaub, koj yuav tsum xav txog qhov kaj ntawm lub projector thiab nws qhov chaw, thiab cov teeb pom kev zoo hauv chav thiab nws cov teeb meem.
Yog hais tias qhov screen npog cov khoom raug xaiv tsis raug, tsis yog txhua tus neeg saib yuav pom tau cov duab tso tawm ntawm qhov screen. Qhov feem ntau universal kev xaiv yog ib qho screen nrog matte dawb txheej nrog ib tug xav paub coefficient ze rau 1. Nws yuav tsum cuam tshuam thiab scatter
Tsis ntev los no, cov ntxaij vab tshaus nrog lub npog "txho" muaj ntau heev. On lawv saum npoo muaj me ntsis tsom iav los ntawm iav, rov qab pom teeb meem nyob rau hauv ib qho chaw nqaim. Cov duab xa mus rau qhov zoo li ib qho screen zoo nkaus li ci ntsa iab thiab zoo nkauj, yog tias koj ntsia nws ntawm txoj cai kaum. Txawm li cas los xij, rau cov neeg saib pom nyob ntawm ib sab, daim duab yuav muaj ntau qhov chaw nyob.