Dab tsi yog qhov txawv ntawm ibLCD projectorthiab aDLP projector? Lub hauv paus ntsiab lus ntawm LCD projection thiab DLP projection yog dab tsi?
LCD (luv rau Liquid Crystal Display) kua siv lead ua kua.
Ua ntej tshaj, LCD yog dab tsi? Peb paub tias qhov teeb meem muaj peb lub xeev: solid state, liquid state, thiab gas state. Txawm hais tias qhov kev npaj ntawm qhov nruab nrab ntawm cov kua molecules tsis muaj qhov tsis tu ncua, yog tias cov molecules elongated (los yog tiaj tus), lawv cov molecular orientation tej zaum yuav yog kev sib deev tsis tu ncua. Yog li peb tuaj yeem faib cov kua hauv lub xeev mus rau ntau hom. Cov kua uas muaj qhov tsis sib xws ntawm cov molecular orientations yog hu ua kua, thaum cov kua uas muaj qhov taw qhia molecules hu ua "kua muaju", kuj hu ua "kua muaju". Cov khoom ua kua siv lead ua kua yog qhov tseeb tsis muaj neeg txawv rau peb. Cov xov tooj ntawm tes thiab lub tshuab xam zauv peb feem ntau pom yog tag nrho cov khoom siv lead ua kua. Cov kua siv lead ua kua tau tshawb pom los ntawm Austrian botanist Reinitzer hauv xyoo 1888. Nws yog ib qho organic compound nrog kev sib xyaw molecular ntawm cov khoom thiab cov 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 ntawm lub teeb sib txawv raws li qhov kev txiav txim ntawm qhov sib txawv voltages. Nyob rau hauv qhov kev txiav txim ntawm cov hluav taws xob sib txawv thiab cov hluav taws xob, cov kua siv lead ua kua molecules yuav raug teeb tsa hauv qhov kev sib hloov tsis tu ncua ntawm 90 degrees, ua rau muaj qhov sib txawv ntawm lub teeb xa hluav taws xob, kom qhov sib txawv ntawm lub teeb thiab tsaus yuav raug tsim los ntawm lub zog ON / OFF, thiab txhua pixel tuaj yeem tswj tau raws li txoj cai no los tsim cov duab xav tau.
LCD kua siv lead ua projector yog cov khoom lag luam ntawm kev sib xyaw ua ke ntawm cov kua siv lead ua kua siv tshuab thiab cov tshuab ua haujlwm. Nws siv cov nyhuv electro-optical ntawm cov kua siv lead ua kua los tswj cov kev xa tawm thiab kev cuam tshuam ntawm cov kua siv lead ua kua los ntawm Circuit Court, thiaj li tsim cov duab nrog ntau qib grey. Lub luag haujlwm tseem ceeb ntawm LCD projector yog Cov duab thaij duab yog lub vaj huam sib luag ua kua.
Txoj Cai
Lub hauv paus ntsiab lus ntawm ib qho LCD yog qhov yooj yim heev, uas yog siv lub teeb hluav taws xob siab rau irradiate lub LCD vaj huam sib luag los ntawm condenser lens. Txij li thaum lub LCD vaj huam sib luag yog lub teeb-hloov, daim duab yuav irradiated, thiab cov duab yuav raug tsim nyob rau hauv lub screen los ntawm lub pem hauv ntej tsom iav thiab lens.
3LCD decomposes lub teeb tawm los ntawm lub teeb rau hauv peb xim R (liab), G (ntsuab), thiab B (xiav), thiab ua rau lawv hla lawv cov kua siv lead ua vaj huam sib luag los muab lawv cov duab thiab kev ua. Txij li thaum peb cov xim tseem ceeb no tau tsim los tas li, lub teeb tuaj yeem siv tau zoo, ua rau cov duab ci thiab meej. Lub 3LCD projector muaj cov yam ntxwv ntawm cov duab ci, ntuj thiab mos.
Qhov zoo:
① Nyob rau hauv cov nqe lus ntawm kev tshuaj ntsuam xim, tam sim no mainstream LCD projectors yog tag nrho peb-chip tshuab, siv ywj siab LCD panels rau peb thawj xim liab, ntsuab, thiab xiav. Qhov no tso cai rau qhov ci ntsa iab thiab qhov sib txawv ntawm txhua qhov xim channel hloov kho ib tus zuj zus, thiab qhov projection yog qhov zoo heev, ua rau cov xim fidelity siab. (DLP projectors ntawm tib qib tsuas yog siv ib daim DLP xwb, uas yog qhov loj heev txiav txim siab los ntawm lub cev lub zog ntawm cov xim log thiab xim kub ntawm lub teeb. Tsis muaj dab tsi los kho, thiab tsuas yog ib qho xim zoo tuaj yeem tau txais. . Tab sis nrog tib lub suab nrov tseem tsis muaj nyob ntawm cov npoo ntawm thaj chaw duab piv rau kim dua LCD projectors.)
② Qhov thib ob qhov zoo ntawm LCD yog nws lub teeb pom kev zoo. LCD projectors muaj ANSI lumen lub teeb tso zis ntau dua li DLP projectors nrog cov teeb ntawm tib lub wattage.
Qhov tsis txaus:
①Qhov kev ua tau zoo ntawm qib dub yog qhov tsis zoo, thiab qhov sib piv tsis siab heev. Cov dub los ntawm LCD projectors ib txwm saib plua plav, nrog cov duab ntxoov ntxoo tshwm tsaus thiab tsis meej.
② Daim duab tsim los ntawm LCD projector tuaj yeem pom cov qauv pixel, thiab qhov zoo thiab qhov tsis zoo. (Cov neeg tuaj saib zoo li tau saib daim duab ntawm lub pane)
DLP Projector
DLP yog lub ntsiab lus ntawm "Digital Light Processing", uas yog, kev ua cov teeb pom kev zoo. Cov tshuab no ua ntej ua cov duab teeb liab digitally, thiab tom qab ntawd ua haujlwm rau lub teeb. Nws yog raws li cov micromirror tivthaiv tsim los ntawm TI (Texas Instruments) - DMD (Digital Micromirror Device) kom ua tiav cov thev naus laus zis ntawm kev pom cov ntaub ntawv digital. DMD digital micromirror ntaus ntawv yog cov khoom siv tshwj xeeb semiconductor tshwj xeeb tsim thiab tsim los ntawm Texas Instruments. DMD nti muaj ntau lub iav me me. Txhua micromirror hauv cov iav no sawv cev rau pixel. Thaj tsam ntawm ib lub pixel yog 16μm × 16, thiab cov lo ntsiab muag tau zoo nyob rau hauv kab thiab kab, thiab tuaj yeem hloov thiab tig hauv ob lub xeev ntawm kev qhib lossis tawm los ntawm kev tswj hwm kev nco, thiaj li tswj tau qhov kev xav ntawm lub teeb. Lub hauv paus ntsiab lus ntawm DLP yog kom dhau lub teeb ci tawm los ntawm lub teeb los ntawm lub lens condensing kom homogenize lub teeb, thiab tom qab ntawd dhau lub log xim (Color Wheel) kom faib lub teeb rau hauv RGB peb xim (lossis ntau xim), thiab tom qab ntawd qhov project cov xim ntawm DMD los ntawm lub lens, thiab thaum kawg projected rau hauv ib daim duab los ntawm ib tug projection lens.
Txoj Cai
Raws li tus naj npawb ntawm DMD digital micromirrors muaj nyob rau hauv DLP projector, tib neeg faib lub projector mus rau hauv ib-chip DLP projector, ob-chip DLP projector thiab peb-chip DLP projector.
Hauv ib qho-chip DMD projection system, lub log xim yuav tsum tsim kom muaj cov duab puv xim. Lub log xim muaj xim liab, ntsuab, thiab xiav lim system, uas tig ntawm qhov zaus ntawm 60Hz. Hauv qhov kev teeb tsa no, DLP ua haujlwm hauv hom xim sib txuas. Lub teeb liab tawm tswv yim tau hloov pauv mus rau RGB cov ntaub ntawv, thiab cov ntaub ntawv tau sau rau hauv SRAM ntawm DMD hauv ntu. Lub teeb dawb yog tsom rau ntawm lub log xim los ntawm lub tsom iav tsom, thiab lub teeb dhau los ntawm lub log xim yog tom qab ntawd duab rau saum npoo ntawm DMD. Thaum cov xim log tig, liab, ntsuab, thiab xiav lub teeb raug txhaj rau ntawm DMD. Cov xim log thiab cov duab yees duab tau ua raws, yog li thaum lub teeb liab tsoo DMD, lub lens yog qaij "rau" hauv txoj hauj lwm thiab kev siv uas cov ntaub ntawv liab yuav tsum tau qhia, thiab tib yam mus rau lub teeb ntsuab thiab xiav thiab cov teeb liab video. . Vim qhov ua tsis pom kev tsis pom kev, tib neeg qhov muag pom qhov system tsom rau cov ntaub ntawv liab, ntsuab, thiab xiav thiab pom cov duab puv xim. Los ntawm qhov projection lens, cov duab tsim ntawm DMD nto tuaj yeem ua rau lub vijtsam loj.
Ib qho-chip DLP projector tsuas muaj ib qho DMD nti xwb. Cov nti no tau zoo sib xws nrog ntau lub ntsej muag me me ntawm lub ntsej muag ntawm lub tshuab hluav taws xob ntawm silicon nti. Txhua lub lens reflective ntawm no sib raug rau ib pixel ntawm cov duab tsim, yog li Yog hais tias lub micromirror DMD nti muaj ntau lub teeb pom kev zoo, qhov siab dua lub cev daws teeb meem uas DLP projector sib haum rau DMD nti tuaj yeem ua tiav.
Qhov zoo:
DLP projector thev naus laus zis yog kev siv tshuab ua kom pom kev pom. Daim ntawv thov ntawm cov khoom siv cuam tshuam DMD, DLP projectors muaj qhov zoo ntawm kev xav, zoo heev hauv qhov sib piv thiab sib xws, cov duab siab txhais, cov duab zoo ib yam, cov xim ntse, thiab cov duab suab nrov ploj, cov duab ruaj khov zoo, cov duab digital muaj peev xwm tuaj yeem txuas ntxiv, thiab kawg. mus ib txhis. Txij li cov khoom siv DLP zoo tib yam siv DMD nti, qhov pom tseeb tshaj plaws yog tias lawv yog cov compact, thiab lub projector tuaj yeem ua tau zoo heev. Lwm qhov zoo dua ntawm DLP projectors yog cov duab du thiab zoo sib xws. Nrog rau qhov sib txawv siab, qhov pom kev cuam tshuam ntawm daim duab muaj zog, tsis muaj kev nkag siab ntawm pixel qauv, thiab cov duab yog ntuj.
Qhov tsis txaus:
Qhov tseem ceeb tshaj plaws yog qhov muag zaj sawv, vim DLP projectors projectors sib txawv xim rau ntawm qhov projection screen los ntawm cov xim log, thiab cov neeg uas muaj lub qhov muag rhiab yuav pom cov xim zoo li zaj sawv zoo li halo. Qhov thib ob, nws nyob ntawm qhov zoo ntawm DMD, kev hloov xim muaj peev xwm thiab kev sib hloov ceev ntawm cov xim log.
Post lub sij hawm: Apr-07-2023
