Teeb tsa lub projector video thiab tshuaj ntsuam tuaj yeem nyuaj. Feem ntau cov projectors tuaj nrog kev ua kom pom tseeb thiab zoom tswj los pab tsim cov duab ntawm qhov loj thiab qhov ntse. Koj tuaj yeem siv lub projector hloov ko taw lossis txav lub kaum sab xis ntawm lub qab nthab kom paub tseeb tias daim duab ntog qhov twg nws yuav tsum. Ua tsis tau li ntawd, siv lub lens hloov lossis kho qhov tseem ceeb los kho cov duab duab. Txawm hais tias ob leeg tuaj yeem kho qhov kev ua haujlwm tsis raug, lawv ua haujlwm sib txawv.
Lens Shift vs. Keystone Kho
- Tsiv lub lens sib dhos hauv txhua qhov kev qhia, tso cai rau tus neeg siv los nruab nrab cov duab ntawm lub vijtsam projection.
- Kho cov duab uas tsis sib luag lossis tsis nyob nruab nrab.
- Digitally alters projected image to ensure an even, rectangular projection.
- Kho cov duab uas dav lossis nqaim ntawm ib sab.
Ob lub lens hloov thiab kho qhov tseem ceeb tso cai rau koj hloov pauv cov duab thiab qhov chaw ntawm cov duab uas xav tau yam tsis tas yuav hloov lub projector. Thaum feem ntau cov yeeb yaj kiab yeeb yaj kiab suav nrog kev kho pob zeb tseem ceeb, qhov projectors pheej yig feem ntau tsis suav nrog lub lens hloov ua qhov kev xaiv ntxiv.
Lens hloov pauv tso cai rau koj lub cev txav lub projector lub lens sib dhos nce, nqis, sab-rau-sab, lossis kab pheeb ces kaum yam tsis tau txav lub projector. Keystone kho (tseem hu ua Digital Keystone Correction) digitally manipulates cov duab ua ntej nws dhau los ntawm lub lens. Nws yog npaj rau cov xwm txheej uas lub projector tsis nyob ib sab ntawm lub vijtsam, ua rau cov duab tsis sib xws, trapezoidal.
Lens Shift Pros and Cons
- Ua kom me me hauv kev taw qhia lub lens kom koj tsis tas yuav txav mus rau tag nrho lub projector.
- Qee qhov pricier video projectors feature chaw taws teeb tswj lens hloov.
- Feem ntau tsuas pom ntawm cov yeeb yaj kiab kim dua.
Nws ib txwm zoo dua los kho cov teeb meem duab ntawm qhov chaw los ntawm kev kho qhov chaw ntawm lub lens nws tus kheej. Projectors nrog lub lens hloov ua haujlwm tso cai rau koj txav lub lens nws tus kheej-ywj siab ntawm lub cev projector. Koj tuaj yeem txav lub lens sib dhos nce, nqis, sab-rau-sab, lossis diagonally yam tsis tau txav lub projector.
Feem ntau cov projectors uas muab lub lens hloov tso cai rau koj txav lub lens nrog lub pob qhov rooj lossis lub xov tooj. Qee qhov high-end projectors muaj lub cev muaj zog uas tso cai rau koj hloov lub lens nrog lub chaw taws teeb tswj. Qhov tshwj xeeb yog feem ntau tshwj tseg rau tus nqi qis dua video projectors, tab sis nws yuav tsim nyog rau kev nqis peev yog tias koj xav tias yuav muaj txheej txheem teeb tsa nyuaj.
Keystone Kho Pros thiab Cons
- Kho cov duab lub kaum sab xis thiab cov duab los ntawm qhov projector cov teeb tsa digital-tsis txhob txav lub projector nws tus kheej.
- Digital duab manipulation-tsis zoo li hloov cov duab ntawm qhov chaw (lub lens lossis lub projector lub cev).
- Tej zaum yuav ua rau cov khoom cuav digital, duab distortion, lossis txo qhov kev daws teeb meem.
Keystone kho hloov cov duab los ntawm qhov chaw los tsim ib qho duab, duab plaub. Nws yog nkag los ntawm lub projector lub on-screen zaub mov los yog ib tug tshwj xeeb tswj khawm ntawm lub projector los yog tej thaj chaw deb tswj. Thaum cov thev naus laus zis kho keystone tso cai rau ob qho tib si ntsug thiab kab rov tav manipulation, tsis yog txhua qhov projectors suav nrog ob qho kev xaiv.
Vim tias kev kho pob zeb tseem ceeb yog cov txheej txheem digital, nws siv compression thiab scaling los tswj cov duab ntawm cov duab projected. Qhov no tuaj yeem ua rau cov khoom qub, duab distortion, lossis txo qhov kev daws teeb meem.
Kev Txiav Txim Kawg
Yog tias lub projector ua tau zoo nrog lub vijtsam ntawm lub kaum sab xis, koj tuaj yeem kho qhov teeb meem nrog lub lens hloov. Yog tias lub projector nyob ntawm lub kaum sab xis nrog lub vijtsam, ua rau cov duab uas dav lossis nqaim ntawm ib sab, siv keystone kho.
Txawm hais tias lub lens hloov thiab kho cov keystone digital tuaj yeem pab tau, lawv yuav tsum raug saib raws li qhov kev xaiv zaum kawg. Yog tias ua tau, hais txog cov teeb meem duab sib dhos thaum txhim kho lub projector.
Yog tias koj tab tom yuav khoom rau lub projector uas yuav muab tso rau hauv ib puag ncig nrog kev txwv qhov chaw-xws li chav kawm lossis chav sib tham-saib seb nws puas muaj lub lens hloov lossis kho keystone ua ntej koj yuav nws. Tej zaum koj kuj yuav xav txog qhov tau txais tus qauv lossis luv luv projector rau qhov chaw me me, lossis lub TV uas haum rau tsev ua yeeb yam.
