Qhov txawv ntawm ib qho yog dab tsi?LCD projectorthiab ib qhoDLP projectorLub hauv paus ntsiab lus ntawm LCD projection thiab DLP projection yog dab tsi?
LCD (luv rau Liquid Crystal Display) yog cov kua siv lead ua zaub.
Ua ntej tshaj plaws, LCD yog dab tsi? Peb paub tias cov khoom muaj peb lub xeev: lub xeev khov, lub xeev kua, thiab lub xeev roj. Txawm hais tias qhov kev npaj ntawm qhov chaw ntawm cov kua molecules tsis muaj kev tsis tu ncua, yog tias cov molecules no ntev (lossis tiaj tus), lawv cov kev taw qhia molecular yuav yog kev sib deev tsis tu ncua. Yog li peb tuaj yeem faib lub xeev kua ua ntau hom. Cov kua nrog cov kev taw qhia molecular tsis tu ncua hu ua kua, thaum cov kua nrog cov molecules kev taw qhia hu ua "kua siv lead ua kua", tseem hu ua "kua siv lead ua kua". Cov khoom siv lead ua kua tsis yog neeg txawv teb chaws rau peb. Lub xov tooj ntawm tes thiab lub tshuab xam zauv uas peb feem ntau pom yog cov khoom siv lead ua kua. Kua siv lead ua kua tau tshawb pom los ntawm Austrian botanist Reinitzer hauv xyoo 1888. Nws yog ib qho organic compound nrog kev npaj molecular tsis tu ncua ntawm cov khoom khov thiab kua. Lub hauv paus ntsiab lus ntawm cov kua siv lead ua kua yog tias cov kua siv lead ua kua yuav qhia cov yam ntxwv sib txawv ntawm lub teeb nyob rau hauv qhov kev ua ntawm cov hluav taws xob sib txawv. Nyob rau hauv qhov kev ua ntawm cov hluav taws xob sib txawv thiab cov teb hluav taws xob, cov kua siv lead ua kua yuav raug teeb tsa rau hauv kev sib hloov tas li ntawm 90 degrees, ua rau muaj qhov sib txawv ntawm kev xa hluav taws xob, yog li qhov sib txawv ntawm lub teeb thiab tsaus ntuj yuav raug tsim nyob rau hauv lub zog ON / OFF, thiab txhua pixel tuaj yeem tswj tau raws li lub hauv paus ntsiab lus no los tsim cov duab xav tau.
LCD kua siv lead ua projector yog cov khoom ntawm kev sib xyaw ua ke ntawm cov kua siv lead ua zaub thev naus laus zis thiab cov thev naus laus zis projection. Nws siv cov nyhuv electro-optical ntawm cov kua siv lead ua los tswj qhov kev xa tawm thiab kev cuam tshuam ntawm cov kua siv lead ua los ntawm lub voj voog, yog li ntawd thiaj li tsim cov duab nrog cov xim grey sib txawv. Lub luag haujlwm tseem ceeb ntawm LCD projector yog Lub cuab yeej kos duab yog lub vaj huam sib luag kua siv lead ua kua..
Lub Ntsiab Cai
Lub hauv paus ntsiab lus ntawm ib lub LCD yooj yim heev, uas yog siv lub teeb ci siab los ua kom lub vaj huam sib luag LCD ci ntsa iab los ntawm lub lens condenser. Vim tias lub vaj huam sib luag LCD xa lub teeb, daim duab yuav raug ci ntsa iab, thiab daim duab yuav tsim los ntawm daim iav pem hauv ntej thiab lub lens.
3LCD rhuav tshem lub teeb uas lub teeb tso tawm ua peb xim ntawm R (liab), G (ntsuab), thiab B (xiav), thiab ua rau lawv hla dhau lawv cov kua siv lead ua kua kom muab lawv cov duab thiab kev ua. Vim tias peb lub xim tseem ceeb no raug tso tawm tas li, lub teeb tuaj yeem siv tau zoo, ua rau cov duab ci thiab meej. Lub projector 3LCD muaj cov yam ntxwv ntawm cov duab ci, ntuj thiab mos.
Qhov Zoo:
① Hais txog xim ntawm lub vijtsam, cov LCD projectors tam sim no yog peb lub tshuab peb-chip, siv cov vaj huam sib luag LCD ywj pheej rau peb xim tseem ceeb ntawm liab, ntsuab, thiab xiav. Qhov no tso cai rau qhov kaj thiab qhov sib piv ntawm txhua txoj kab xim kom raug kho ib tus zuj zus, thiab qhov projection zoo heev, ua rau muaj cov xim zoo. (DLP projectors ntawm tib qib tsuas yog siv tau ib daim DLP, uas feem ntau yog txiav txim siab los ntawm cov khoom siv lub cev ntawm lub log xim thiab qhov kub xim ntawm lub teeb. Tsis muaj dab tsi los kho, thiab tsuas yog xim raug xwb thiaj li tau txais. Tab sis nrog tib lub suab Vibrant tseem tsis txaus ntawm ntug ntawm thaj chaw duab piv rau cov LCD projectors kim dua.)
② Qhov zoo thib ob ntawm LCD yog nws lub teeb ci zoo heev. Cov projectors LCD muaj lub teeb ci ANSI lumen siab dua li DLP projectors nrog cov teeb ntawm tib lub wattage.
Qhov Tsis Zoo:
①Qhov kev ua tau zoo ntawm qib dub tsis zoo, thiab qhov sib piv tsis siab heev. Cov xim dub los ntawm LCD projectors yeej ib txwm zoo li muaj plua plav, nrog rau cov duab ntxoov ntxoo tsaus ntuj thiab tsis muaj qhov ntxaws.
② Daim duab uas tsim los ntawm LCD projector tuaj yeem pom cov qauv pixel, thiab qhov zoo thiab qhov xav tsis zoo. (Cov neeg tuaj saib zoo li tab tom saib daim duab los ntawm lub qhov rai)
DLP Projector
DLP yog lub npe luv ntawm "Digital Light Processing", uas yog, digital light processing. Cov thev naus laus zis no ua ntej ua cov duab teeb liab digital, thiab tom qab ntawd tso tawm lub teeb. Nws yog raws li cov khoom siv digital micromirror tsim los ntawm TI (Texas Instruments) - DMD (Digital Micromirror Device) los ua kom tiav cov thev naus laus zis ntawm kev tso saib cov ntaub ntawv digital. DMD digital micromirror device yog cov khoom siv semiconductor tshwj xeeb tsim thiab tsim los ntawm Texas Instruments. Lub DMD chip muaj ntau daim iav me me. Txhua daim iav micromirror hauv cov iav no sawv cev rau ib pixel. Thaj chaw ntawm ib pixel yog 16μm × 16, thiab cov iav tau teeb tsa ze rau hauv kab thiab kem, thiab tuaj yeem hloov thiab tig hauv ob lub xeev ntawm qhib lossis kaw los ntawm kev tswj hwm lub cim xeeb, yog li tswj kev cuam tshuam ntawm lub teeb. Lub hauv paus ntsiab lus ntawm DLP yog kom dhau lub teeb ci uas lub teeb tawm los ntawm lub lens condensing kom homogenize lub teeb, thiab tom qab ntawd dhau lub log xim (Coloured Log) los faib lub teeb ua RGB peb xim (lossis ntau xim), thiab tom qab ntawd tso cov xim rau ntawm DMD los ntawm lub lens, thiab thaum kawg tso rau hauv daim duab los ntawm lub lens projection.
Lub Ntsiab Cai
Raws li tus naj npawb ntawm DMD digital micromirrors uas muaj nyob hauv DLP projector, tib neeg faib lub projector ua ib lub DLP projector ib-chip, ob-chip DLP projector thiab peb-chip DLP projector.
Hauv ib lub tshuab DMD projection system uas siv ib lub chip xwb, yuav tsum muaj lub log xim los tsim ib daim duab uas muaj xim puv npo. Lub log xim muaj lub lim xim liab, ntsuab, thiab xiav, uas tig ntawm 60Hz. Hauv qhov kev teeb tsa no, DLP ua haujlwm hauv hom xim sib law liag. Lub teeb liab nkag mus rau hauv cov ntaub ntawv RGB, thiab cov ntaub ntawv raug sau rau hauv SRAM ntawm DMD ua ntu zus. Lub teeb dawb raug tsom mus rau lub log xim los ntawm lub lens tsom, thiab lub teeb uas hla lub log xim ces raug thaij duab rau ntawm qhov chaw ntawm DMD. Thaum lub log xim tig, lub teeb liab, ntsuab, thiab xiav raug tua ua ntu zus rau ntawm DMD. Lub log xim thiab daim duab video yog sib law liag, yog li thaum lub teeb liab ntaus rau DMD, lub lens raug tig "rau" rau hauv qhov chaw thiab qhov muaj zog uas cov ntaub ntawv liab yuav tsum qhia, thiab tib yam li ntawd rau lub teeb ntsuab thiab xiav thiab lub teeb video. Vim yog qhov cuam tshuam ntawm kev pom kev, tib neeg lub cev pom kev tsom mus rau cov ntaub ntawv liab, ntsuab, thiab xiav thiab pom ib daim duab xim puv npo. Los ntawm lub lens projection, daim duab tsim rau ntawm DMD nto tuaj yeem tso tawm rau ntawm lub vijtsam loj.
Ib lub projector DLP ib lub chip tsuas muaj ib lub DMD chip xwb. Lub chip no tau teeb tsa ze nrog ntau lub lens me me plaub fab ntawm lub node hluav taws xob ntawm lub silicon chip. Txhua lub lens reflective ntawm no sib raug rau ib pixel ntawm daim duab tsim tawm, yog li ntawd, yog tias lub digital micromirror DMD chip muaj ntau lub lens reflective, qhov siab dua qhov kev daws teeb meem ntawm lub cev uas DLP projector sib raug rau lub DMD chip tuaj yeem ua tiav.
Qhov Zoo:
DLP projector thev naus laus zis yog thev naus laus zis projection reflective. Kev siv cov khoom siv DMD reflective, DLP projectors muaj qhov zoo ntawm kev cuam tshuam, zoo heev hauv kev sib piv thiab kev sib xws, cov duab txhais siab, daim duab sib xws, xim ntse, thiab suab nrov ploj mus, cov duab zoo ruaj khov, cov duab digital raug tuaj yeem rov ua dua tas li, thiab kav ntev mus ib txhis. Txij li thaum DLP projectors ib txwm siv DMD chip, qhov zoo tshaj plaws yog tias lawv me me, thiab lub projector tuaj yeem ua kom me me heev. Lwm qhov zoo ntawm DLP projectors yog cov duab du thiab kev sib piv siab. Nrog kev sib piv siab, qhov cuam tshuam pom ntawm daim duab muaj zog, tsis muaj kev nkag siab ntawm cov qauv pixel, thiab daim duab yog ntuj.
Qhov Tsis Zoo:
Qhov tseem ceeb tshaj plaws yog qhov muag xim av, vim tias DLP projectors tso tawm cov xim tseem ceeb sib txawv rau ntawm lub vijtsam projection los ntawm lub log xim, thiab cov neeg uas muaj qhov muag rhiab heev yuav pom lub halo zoo li xim av. Qhov thib ob, nws nyob ntawm qhov zoo ntawm DMD, lub peev xwm hloov xim thiab qhov ceev ntawm lub log xim.
Lub sijhawm tshaj tawm: Plaub Hlis-07-2023
