Yog tias koj tab tom yuav yuav lub TV lossis video projector thiab tsis tau yuav khoom hauv ob peb xyoos, tej zaum yuav tsis meej pem ntau dua. Txawm hais tias koj saib hauv online lossis ntawv xov xwm tshaj tawm lossis mus rau koj tus neeg muag khoom hauv zos txias qaib ntxhw, muaj ntau cov ntsiab lus thev naus laus zis pov tseg, ntau tus neeg siv khoom kawg rub tawm lawv cov nyiaj ntsuab thiab vam tias qhov zoo tshaj plaws.
Cov ntaub ntawv no siv rau TVs los ntawm ntau lub tuam txhab suav nrog, tab sis tsis txwv rau, cov tsim los ntawm LG, Samsung, Panasonic, Sony, thiab Vizio thiab cov yeeb yaj kiab video los ntawm cov tuam txhab xws li Epson, Optoma, BenQ, Sony, thiab JVC.
The HDR Factor
Ib lo lus "techie" uas tau nkag mus rau hauv TV sib xyaw yog HDR. HDR (High Dynamic Range) yog txhua qhov npau taws ntawm cov neeg tsim TV, thiab muaj qhov laj thawj zoo rau cov neeg siv khoom ceeb toom.
Txawm hais tias 4K tau txhim kho kev daws teeb meem, HDR tiv thaiv lwm qhov tseem ceeb hauv TV thiab video projectors, lub teeb tso zis (luminance).
Lub hom phiaj ntawm HDR yog txhawm rau txhawb nqa lub teeb pom kev zoo kom pom cov duab muaj cov yam ntxwv zoo li lub teeb pom kev zoo uas peb tau ntsib hauv "lub ntiaj teb tiag."
Raws li qhov tshwm sim ntawm kev siv HDR, ob lub ntsiab lus tsim kho tau nce mus rau qhov tseem ceeb hauv TV thiab video projector txhawb nqa: Nits thiab Lumens.
Txawm hais tias lo lus Lumens tau ua lub luag haujlwm tseem ceeb ntawm kev lag luam video projector rau qee xyoo, thaum yuav khoom rau TV, cov neeg siv khoom tam sim no raug cuam tshuam nrog lub sij hawm Nits los ntawm cov neeg tsim TV thiab cov neeg muag khoom.
Ua ntej HDR muaj nyob rau thaum cov neeg siv khoom lag luam rau TV, ib hom / qauv yuav tau saib "ci" dua li lwm tus, tab sis qhov sib txawv ntawd tsis muaj tseeb, koj tsuas yog yuav tsum tau muag qhov muag xwb.
Nrog HDR muaj nyob rau ntawm ntau lub TVs, lub teeb tso zis (daim ntawv ceeb toom kuv tsis tau hais qhov ci, uas yuav tau tham tom qab) yog qhov muaj nuj nqis hauv Nits - ntau Nits, txhais tau tias TV tuaj yeem tso tawm ntau lub teeb, nrog thawj Lub hom phiaj los txhawb HDR - nrog rau cov ntsiab lus sib xws lossis cov txiaj ntsig HDR generic tsim los ntawm TV's kev ua haujlwm sab hauv.
Dab tsi Nits thiab Lumens yog
Ntawm no yog txhais li cas Nits thiab Lumens.
Nits - Xav txog lub TV zoo li lub hnub, uas tawm lub teeb ncaj qha. Ib Nit yog ib qho kev ntsuas ntawm lub teeb lub TV ntau npaum li cas xa mus rau koj lub qhov muag (luminance) hauv ib cheeb tsam. Nyob rau theem kev tshaj lij, NIT yog tus nqi ntawm lub teeb pom kev sib npaug ntawm ib lub candela ib square meter (cd / m2 - ib qho qauv ntsuas ntawm luminous siv).
Muab qhov no tso rau hauv qhov kev xav, qhov nruab nrab TV yuav muaj peev xwm tso tawm 100 txog 200 Nits, thaum HDR-tshaj TVs yuav muaj peev xwm tso tawm 400 txog 2,000 nits.
Lumens - Lumens yog ib lub ntsiab lus dav dav piav txog lub teeb pom kev zoo, tab sis rau cov yeeb yaj kiab video, cov ntsiab lus raug siv tshaj plaws yog ANSI Lumens (ANSI sawv cev rau Asmeskas National Standards Institute).
Raws li Nits, ib qho ANSI lumen yog tus nqi ntawm lub teeb uas tau cuam tshuam los ntawm ib square meter cheeb tsam uas yog ib meter los ntawm ib tug candela teeb qhov chaw. Xav txog cov duab uas tso rau ntawm lub vijtsam video, lossis phab ntsa raws li lub hli, uas cuam tshuam lub teeb rov qab rau tus saib.
1000 ANSI Lumens yog qhov tsawg kawg nkaus uas lub projector yuav tsum muaj peev xwm tso tawm rau kev siv tsev ua yeeb yam, tab sis feem ntau lub tsev ua yeeb yam projectors nruab nrab ntawm 1, 500 txog 2, 500 ANSI lumens ntawm lub teeb tso zis. Ntawm qhov tod tes, ntau lub hom phiaj video projectors (siv rau ntau lub luag haujlwm, uas yuav suav nrog kev lom zem hauv tsev, kev lag luam, lossis kev siv kev kawm, tej zaum yuav muaj peev xwm tso tawm 3,000 lossis ntau dua ANSI lumens).
Nits vs. Lumens
Ib Nit sawv cev ntau dua lub teeb dua 1 ANSI lumen. Qhov sib txawv lej ntawm Nits thiab Lumens yog qhov nyuaj. Txawm li cas los xij, rau cov neeg siv khoom sib piv lub TV nrog lub projector video, ib txoj hauv kev los tso nws yog 1 Nit raws li qhov kwv yees sib npaug ntawm 3.426 ANSI Lumens.
Siv cov ntsiab lus siv dav dav, txhawm rau txiav txim siab kwv yees li ntawm Nits piv rau kwv yees tus lej ntawm ANSI lumens, koj tuaj yeem muab tus lej ntawm Nits los ntawm 3.426. Yog tias koj xav ua qhov thim rov qab, faib cov Lumens los ntawm 3.426.
Nov yog qee qhov piv txwv:
| NITS vs Lumens - kwv yees sib piv | |
|---|---|
| NITS | ANSI LUMENS |
| 200 | 685 |
| 500 | 1, 713 |
| 730 | 2,500 |
| 1,000 | 3, 246 |
| 1,500 | 5, 139 |
| 2,000 | 6,582 |
Rau qhov video projector kom ua tiav lub teeb pom kev sib npaug rau 1,000 Nits (nco ntsoov tias koj teeb pom kev zoo tib yam ntawm chav tsev thiab chav teeb pom kev zoo tib yam) - nws yuav tsum tau tso tawm ntau npaum li cas raws li 3, 426 ANSI Lumens, uas yog tawm ntawm ntau yam rau feem ntau lub tsev ua yeeb yam projectors.
Txawm li cas los xij, lub projector uas tuaj yeem tso tawm 1, 713 ANSI Lumens, uas tau yooj yim ua tau, tuaj yeem kwv yees li lub TV uas muaj lub teeb pom kev ntawm 500 Nits.
Tau txais meej dua, lwm yam, xws li TV npo loj kuj cuam tshuam rau Nits / Lumens kev sib raug zoo. Piv txwv li, 65-nti TV uas tso tawm 500 nits yuav muaj kwv yees li plaub npaug ntawm lumens tso zis ntawm 32-nti TV tso tawm 500 nits. Muab qhov kev hloov pauv no rau hauv tus account, thaum piv cov nits, lub vijtsam loj, thiab lumens, cov qauv siv yuav tsum yog
Lumens=Nits x Screen Cheeb Tsam x Pi (3.1416) Qhov screen yog txiav txim siab los ntawm kev sib npaug ntawm qhov dav thiab qhov siab teev hauv square meters. Siv 500 nit 65-nti TV uas yog 1.167 square meter screen cheeb tsam, qhov sib npaug lumens yuav yog 1, 833.
TV thiab Video Projector Lub Teeb Tso Tawm Hauv Ntiaj Teb tiag
Txawm hais tias tag nrho cov lus "techie" saum toj no ntawm Nits thiab Lumens muab cov txheeb ze siv, hauv cov ntawv thov hauv ntiaj teb tiag tiag, cov lej tsuas yog ib feem ntawm zaj dab neeg.
- Thaum lub TV lossis video projector yog touted li muaj peev xwm tso zis 1,000 Nits lossis Lumens, qhov ntawd tsis txhais hais tias TV lossis projector tso tawm lub teeb ntau txhua lub sijhawm. Ncej lossis scenes feem ntau tso saib ntau yam ntawm cov ntsiab lus ci thiab tsaus, nrog rau kev sib txawv ntawm cov xim. Tag nrho cov kev hloov pauv no xav tau ntau theem ntawm lub teeb tso zis.
- Yog tias koj muaj ib qho xwm txheej nrog lub hnub nyob saum ntuj, feem ntawm daim duab ntawd yuav xav tau lub TV lossis video projector kom tso tawm ntau tshaj Nits lossis Lumens. Txawm li cas los xij, lwm feem ntawm daim duab, xws li cov tsev, toj roob hauv pes, thiab duab ntxoov ntxoo, yuav tsum muaj lub teeb pom kev tsawg dua, tej zaum tsuas yog 100 lossis 200 Nits lossis Lumens. Tsis tas li, cov xim sib txawv uas tau tshwm sim ua rau muaj qhov sib txawv ntawm cov teeb pom kev sib txawv hauv ib lub thav duab lossis scene.
- Ib lub ntsiab lus tseem ceeb yog qhov sib piv ntawm cov khoom ci ntsa iab thiab cov khoom tsaus ntuj tshaj plaws yog tib yam, lossis ze rau tib yam li qhov ua tau, ua rau muaj kev cuam tshuam zoo ib yam. Qhov no yog qhov tshwj xeeb tshaj yog rau HDR-enabled OLED TVs nyob rau hauv kev sib raug zoo rau LED / LCD TVs. OLED TV thev naus laus zis tsis tuaj yeem txhawb nqa ntau npaum li cov Nits ntawm lub teeb tso zis li LED / LCD TV thev naus laus zis tuaj yeem ua tau. Txawm li cas los xij, tsis zoo li LED / LCD TV, thiab OLED TV tuaj yeem tsim cov xim dub.
- Txawm tias tus qauv HDR zoo tshaj plaws rau LED / LCD TVs yog lub peev xwm los tso saib tsawg kawg 1,000 Nits, tus qauv HDR rau OLED TVs tsuas yog 540 Nits xwb. Txawm li cas los xij, nco ntsoov, tus qauv siv rau qhov siab tshaj plaws Nits tso zis, tsis yog qhov nruab nrab Nits cov zis. Txawm hais tias koj yuav pom tias 1,000 Nit muaj peev xwm LED / LCD TV yuav zoo dua li OLED TV thaum, hais tias, ob qho tib si tab tom nthuav tawm lub hnub lossis lub ntuj ci heev, OLED TV yuav ua haujlwm zoo dua ntawm kev pom qhov tsaus ntuj ntawm tib daim duab ntawd, yog li tag nrho Dynamic Range (qhov taw qhia qhov nrug ntawm qhov siab tshaj plaws dawb thiab siab tshaj plaws dub yuav zoo sib xws).
- Thaum muab piv rau HDR-enabled TV uas tuaj yeem tso tawm 1,000 Nits, nrog rau HDR-enabled video projector uas tuaj yeem tso tawm 2,500 ANSI lumens, HDR cuam tshuam rau TV yuav ua rau muaj kev cuam tshuam ntau dua " perceived brightness."
- Rau cov yeeb yaj kiab video, muaj qhov sib txawv ntawm lub teeb pom kev zoo ntawm cov projectors uas siv LCD thiab DLP thev naus laus zis. LCD projectors muaj lub peev xwm ntawm kev xa cov teeb pom kev sib npaug ntawm qhov muaj peev xwm rau ob qho tib si dawb thiab xim, thaum DLP projectors uas ntiav cov xim log tsis muaj peev xwm ua kom muaj qhov sib npaug ntawm cov xim dawb thiab xim lub teeb tso zis.
Cov yam ntxwv xws li saib hauv chav tsaus, tsis zoo li chav teeb ci, qhov loj me, lub vijtsam cuam tshuam (rau qhov projectors), thiab qhov chaw zaum deb, ntau dua lossis tsawg dua Nit lossis Lumen tso tawm yuav tsum tau txais tib yam. xav pom kev cuam tshuam.
The Audio Analogy
Ib qho piv txwv los mus txog qhov teeb meem HDR / Nits / Lumens yog tib yam uas koj yuav tsum ua kom lub zog amplifier specifications hauv suab. Tsuas yog vim hais tias lub amplifier los yog lub tsev ua yeeb yaj kiab tau thov kom xa 100 watts ib channel, tsis tau txhais hais tias nws tso zis ntau zog txhua lub sijhawm.
Txawm hais tias lub peev xwm muaj peev xwm ua tau 100 watts muab qhov qhia txog qhov xav tau rau cov suab paj nruag lossis yeeb yaj kiab suab paj nruag, feem ntau, rau lub suab, thiab feem ntau cov suab paj nruag thiab suab cuam tshuam, tib lub receiver tsuas yog xav tau. tso zis 10 watts los yog li ntawd rau koj kom hnov qhov koj xav hnov.
Light Output vs. Brightness
Rau TVs thiab Video Projectors, Nits thiab ANSI Lumens yog ob qho tib si ntsuas ntawm lub teeb pom kev zoo (Luminance). Txawm li cas los xij, lo lus Brightness haum rau qhov twg?
- Brightness tsis zoo ib yam li qhov tseeb quantified Luminance (lub teeb tso zis). Brightness tuaj yeem raug xa mus rau qhov muaj peev xwm txheeb xyuas qhov sib txawv hauv Luminance.
- Brightness kuj yuav raug qhia raws li feem pua zoo dua lossis feem pua tsawg dua ci los ntawm cov ntsiab lus siv (xws li Kev Tswj Brightness ntawm TV lossis video projector-saib cov lus piav qhia hauv qab no). Hauv lwm lo lus, Brightness yog qhov kev txhais lus (ntau dua, ci dua) ntawm kev pom Luminance, tsis yog qhov tseeb tsim Luminance.
- Txoj kev uas TV lossis Video projector tswj qhov ci ua haujlwm yog los ntawm kev kho cov qib dub uas pom ntawm lub vijtsam. Kev txo qis "kev ci ntsa iab" ua rau ua rau qhov tsaus ntuj ntawm cov duab tsaus, ua rau txo cov ntsiab lus thiab "muddy" saib hauv qhov tsaus ntuj ntawm daim duab. Ntawm qhov tod tes, tsa qhov "ci ntsa iab" ua rau qhov tsaus ntuj ntawm cov duab ci dua, uas ua rau qhov tsaus ntuj ntawm cov duab tshwm ntau grey, nrog rau tag nrho cov duab zoo li ntxuav tawm.
- Txawm hais tias Brightness tsis zoo ib yam li qhov muaj nuj nqis Luminance (lub teeb tso zis), ob qho tib si TV thiab video projector tsim, nrog rau cov neeg tshuaj xyuas cov khoom, muaj tus cwj pwm ntawm kev siv lub sij hawm Brightness raws li kev ntes-tag nrho rau cov lus qhia ntxiv uas piav txog lub teeb tso zis, uas suav nrog Nits thiab Lumens. Ib qho piv txwv yog Epson siv lo lus "Color Brightness" uas tau hais ua ntej hauv kab lus no.
TV thiab Projector Light Output Guidelines
Kev ntsuas lub teeb pom kev zoo nrog rau kev sib raug zoo ntawm Nits thiab Lumens cuam tshuam nrog ntau tus lej thiab physics, thiab ua kom kub rau hauv cov lus piav qhia luv luv tsis yooj yim. Yog li, thaum lub tuam txhab TV thiab video projector ntaus cov neeg siv khoom nrog cov ntsiab lus xws li Nits thiab Lumens yam tsis muaj cov ntsiab lus, txhua yam tuaj yeem ua rau tsis meej pem.
Txawm li cas los xij, thaum xav txog cov teeb pom kev zoo, ntawm no yog qee cov lus qhia kom nco ntsoov.
- Rau 720p / 1080p lossis Non-HDR 4K Ultra HD TVs, cov ntaub ntawv ntawm Nits feem ntau tsis tau tshaj tawm tab sis nws txawv ntawm 200 txog 300 Nits, uas yog ci txaus rau cov ntsiab lus ib txwm muaj thiab feem ntau hauv chav teeb pom kev zoo (txawm tias 3D yuav yuav noticeably dimmer). Qhov twg koj yuav tsum xav txog qhov kev ntaus nqi Nits tshwj xeeb tshaj yog nrog 4K Ultra HD TVs uas suav nrog HDR - qhov siab dua lub teeb tso zis, qhov zoo dua.
- Rau 4K Ultra HD LED / LCD TVs uas yog HDR-tshaj, qhov ntsuas ntawm 500 Nits muab cov nyhuv HDR me me (saib daim ntawv lo xws li HDR hwm ), thiab TVs uas tso zis 700 Nits yuav muab cov txiaj ntsig zoo dua nrog cov ntsiab lus HDR. Txawm li cas los xij, yog tias koj tab tom nrhiav qhov txiaj ntsig zoo tshaj plaws, 1000 Nits yog tus qauv siv raws li tus qauv (saib cov ntawv xws li HDR1000), thiab Nits top-off rau qhov siab tshaj plaws HDR LED /LCD TVs yog 2,000.
- Yog tias yuav khoom rau OLED TV, lub teeb pom kev siab dej siab yog li 600 Nits - tam sim no, tag nrho HDR-muaj peev xwm OLED TVs yuav tsum muaj peev xwm tso tawm cov teeb pom kev tsawg kawg ntawm 540 Nits. Txawm li cas los xij, ntawm qhov sib npaug ntawm qhov sib npaug, raws li tau hais dhau los, OLED TVs tuaj yeem tso saib cov xim dub, uas LED / LCD TVs tsis tuaj yeem - yog li ntawd 540 txog 600 Nits kev ntsuam xyuas ntawm OLED TV tuaj yeem pom qhov txiaj ntsig zoo nrog HDR cov ntsiab lus dua li LED / LCD TV tuaj yeem ntsuas ntawm tib qib Nits.
- Txawm hais tias 600 Nit OLED TV thiab 1,000 Nit LED / LCD TV tuaj yeem saib zoo nkauj, 1,000 Nit LED / LCD TV tseem yuav ua rau muaj txiaj ntsig zoo dua, tshwj xeeb tshaj yog nyob rau hauv chav tsev zoo.. Raws li tau hais yav dhau los, 2, 000 Nits yog tam sim no lub teeb pom kev zoo tshaj plaws uas tuaj yeem pom hauv TV, tab sis qhov ntawd yuav ua rau pom cov duab uas khaus heev rau qee tus neeg saib.
- Yog tias koj tab tom yuav khoom video projector, raws li tau hais los saum toj no, lub teeb pom kev zoo 1,000 ANSI Lumens yuav tsum yog qhov tsawg kawg nkaus los txiav txim siab, tab sis feem ntau cov projectors muaj peev xwm tso tawm 1,500 txog 2,000 ANSI lumens, uas muab kev ua tau zoo dua nyob rau hauv chav tsev uas tej zaum yuav tsis tuaj yeem ua kom tsaus nti. Tsis tas li ntawd, yog tias koj ntxiv 3D los sib xyaw, xav txog qhov projector nrog 2, 000 lossis ntau dua lumens tso zis, vim 3D cov duab yog ib txwm dim ntau dua li lawv cov 2D counterparts.
- HDR-enabled video projectors tsis muaj "point-to-point raug" nrog rau cov khoom ci me me tiv thaiv keeb kwm yav dhau tsaus. Piv txwv li, HDR TV yuav tso cov hnub qub tawm tsam hmo ntuj dub ntau dua li qhov ua tau ntawm cov neeg siv khoom raws li HDR projector. Qhov no yog vim qhov projectors muaj teeb meem hauv kev nthuav tawm qhov ci ntsa iab hauv thaj chaw me me uas cuam tshuam nrog cov duab tsaus nti. Rau qhov zoo tshaj plaws HDR cov txiaj ntsig muaj nyob rau tam sim no (uas tseem poob qis ntawm qhov pom qhov ci ntawm 1,000 Nit TV), koj yuav tsum xav txog 4K HDR-enabled projector uas tuaj yeem tso tawm tsawg kawg 2500 ANSI lumens. Tam sim no, tsis muaj kev tshaj tawm HDR teeb pom kev zoo rau cov neeg siv khoom siv video projectors.
Txoj kab hauv qab
Ib yam li cov lus qhia tshwj xeeb lossis cov ntsiab lus thev naus laus zis uas cuam tshuam rau koj los ntawm cov chaw tsim khoom lossis tus neeg muag khoom, tsis txhob xav. Nits thiab Lumens tsuas yog ib feem ntawm qhov sib npaug thaum xav txog kev yuav lub TV lossis video projector.
Muab tag nrho cov pob rau hauv kev txiav txim siab, uas tsis yog suav nrog cov teeb pom kev zoo nkaus xwb tab sis yuav ua li cas tag nrho cov duab zoo rau koj raws li:
- Perceived brightness
- xim
- Kev sib tw
- Txoj lus teb
- Viewing Angle
- Yooj yim teeb tsa thiab siv
- Sound quality (yog tias koj tsis mus siv lub suab sab nraud)
- Cov yam ntxwv yooj yim ntxiv (xws li internet streaming hauv TVs).
Tseem nco ntsoov tias yog tias koj xav tau HDR-nruab TV, koj yuav tsum coj cov ntsiab lus nkag mus ntxiv rau hauv kev txiav txim siab (4K Streaming thiab Ultra HD Blu-ray Disc).
