Lub Cathode Ray Tube, lossis CRT, saib yog daim ntawv qub tshaj plaws ntawm cov duab video rau PC systems. Ntau lub khoos phis tawj thaum ntxov tau saib xyuas uas tso tawm rau tus qauv sib xyaw video teeb liab kom lub vijtsam tuaj yeem tso tawm ntawm lub TV tsis tu ncua. Raws li lub sijhawm tau nce mus, qib ntawm kev siv tshuab tau zoo li cas. Nov yog CRT saib xyuas kev daws teeb meem tshwj xeeb kom koj tuaj yeem ntsuas cov lus qhia ua ntej yuav ib qho.
Saib Qhov Loj thiab Saib Thaj Chaw
Txhua CRT saib yog muag raws li qhov screen loj. Qhov loj me ntawm lub vijtsam yog nyob ntawm qhov ntsuas kab pheeb ces kaum ntawm lub kaum sab xis mus rau lub kaum sab sauv sab saud ntawm lub vijtsam hauv nti. Txawm li cas los xij, tus saib loj tsis txhais mus rau qhov tseeb qhov loj me. Tus saib lub raj feem ntau yog ib feem los ntawm sab nraud ntawm lub vijtsam.
Tsis tas li, lub raj feem ntau tsis tuaj yeem ua cov duab rau ntawm cov npoo ntawm lub raj puv. Yog li, thaum nrhiav kev yuav CRT, saib qhov ntsuas thaj tsam uas tau muab los ntawm cov chaw tsim khoom. Qhov no feem ntau yog kwv yees li.9 txog 1.2 ntiv tes me dua lub raj kab pheeb ces kaum.
Resolution
Txhua tus saib CRT raug xa mus ua multisync saib. Cov saib no tuaj yeem kho cov kab hluav taws xob, yog li nws muaj peev xwm ua kom pom ntau qhov kev daws teeb meem ntawm qhov sib txawv ntawm qhov hloov tshiab. Nov yog cov npe ntawm qee qhov kev daws teeb meem uas siv ntau dua nrog rau lawv cov lus sau:
- SVGA: 800x600
- XGA: 1024x768
- SXGA: 1280x1024
- UXGA: 1600x1200
Muaj ntau yam kev daws teeb meem uas nyob nruab nrab ntawm cov qauv no uas tuaj yeem siv los ntawm CRT saib. Qhov nruab nrab 17-nti CRT tuaj yeem ua tau yooj yim SXGA daws teeb meem thiab tuaj yeem ncav cuag UXGA daws teeb meem. Ib qho 21-nti lossis loj dua CRT tuaj yeem ua UXGA thiab siab dua.
Refresh tus nqi
Tus nqi refresh yog hais txog cov sij hawm uas tus saib hla lub beam hla tag nrho cheeb tsam ntawm cov zaub. Tus nqi no tuaj yeem sib txawv nyob ntawm lub computer teeb tsa thiab daim npav duab.
Txhua qhov kev ntsuas tshiab los ntawm cov tuam txhab lag luam zoo li teev qhov siab tshaj plaws refresh tus nqi ntawm qhov kev daws teeb meem. Tus lej no tau teev nyob rau hauv Hertz lossis cycles ib ob. Piv txwv li, ib daim ntawv saib spec yuav sau qee yam xws li 1280x1024 @ 100Hz. Qhov no txhais tau tias tus saib xyuas qhov screen 100 zaug ib ob ntawm 1280-pixel-by-1024-pixel daws teeb meem.
Yog li vim li cas qhov kev hloov tshiab tseem ceeb? Kev saib CRT zaub nyob rau lub sijhawm ntev tuaj yeem ua rau qhov muag nkees. Cov saib ua haujlwm ntawm tus nqi qis qis ua rau qhov qaug zog hauv lub sijhawm luv dua. Feem ntau, nws yog qhov zoo tshaj plaws kom tau txais ib lub monitor uas qhia ntawm 75 Hz lossis zoo dua ntawm qhov xav tau daws teeb meem.60 Hz yog suav tias yog qhov tsawg kawg nkaus thiab yog qhov zoo li qub tshiab rau cov tsav tsheb video thiab saib hauv Windows.
Dot Pitch
Qhov no yog hais txog qhov loj ntawm qhov muab pixel ntawm lub vijtsam hauv millimeters. Qhov no yog ib qho teeb meem nyob rau hauv lub xyoo dhau los thaum cov ntxaij vab tshaus uas tau sim ua kom muaj kev daws teeb meem loj nrog cov qhab nia loj me me nyiam muaj cov duab fuzzy vim cov xim los ntshav ntawm pixels ntawm lub vijtsam.
Ntau lub tuam txhab thiab cov khw muag khoom tsis sau cov qhab nia dot-pitch.
Kev ntsuas qis qis dua yog qhov nyiam vim tias cov no muab cov duab pom meej dua. Feem ntau qhov kev ntsuas rau qhov no yog nyob nruab nrab ntawm.21 thiab.28 mm, nrog rau feem ntau cov ntxaij vab tshaus muaj qhov ntsuas nruab nrab ntawm.25 mm.
Cabinet Size
Ib thaj chaw uas cov neeg siv khoom feem ntau saib thaum yuav CRT saib yog qhov loj ntawm lub txee. CRT saib tuaj yeem loj thiab hnyav. Yog tias koj muaj qhov tsawg ntawm qhov chaw ntawm lub rooj, qhov loj ntawm tus saib koj xav kom haum rau hauv cheeb tsam yog txwv. Qhov no yog qhov tseem ceeb tshwj xeeb rau lub ntsuas qhov tob.
Ntau lub chaw ua haujlwm hauv computer thiab cov rooj sib tham zoo li muaj cov txee uas haum nyob ib puag ncig tus saib uas tseem muaj vaj huam sib luag rov qab. Cov saib loj hauv ib puag ncig zoo li no tuaj yeem raug yuam kom ze rau cov neeg siv lossis txwv kev siv cov keyboard.
Screen Contour
CRT cov lus qhia muaj ntau yam contours rau pem hauv ntej ntawm lub vijtsam lossis raj. Cov raj qub zoo ib yam li TV teeb muaj qhov sib npaug kom yooj yim rau cov kab hluav taws xob scanning kom muab cov duab meej. Raws li thev naus laus zis tau nce zuj zus, cov ntxaij vab tshaus tuaj txog uas muaj qhov contour ntawm sab laug thiab sab xis tab sis ib qho chaw tiaj tus vertically.
Tam sim no, CRT saib muaj nyob nrog cov ntxaij vab tshaus zoo kawg nkaus rau ob qho tib si kab rov tav thiab ntsug. Yog li, vim li cas qhov contour tseem ceeb? Rounded screen nto zoo li xav pom lub teeb ntau dua thiab ua rau pom qhov pom ntawm qhov screen. Zoo ib yam li tus nqi qis qis, qhov loj ntawm glare ntawm lub vijtsam computer ua rau qhov muag qaug zog.
