Yuav ua li cas yog ib tug cathode Ray Tube

Tej zaum tsis muaj tsis muaj xws li tus neeg uas yuav nyob rau hauv nws lub neej ntsib nrog cov pab kiag li lawm, tus tsim ntawm cov uas muaj xws li ib tug cathode txoj sab ci raj (los yog CRT). Tam sim no zoo xws li cov ntsiab yog nquag hloov los ntawm lawv cov ntau niaj hnub counterparts raws li nyob rau hauv cov kua siv lead ua qhia (LCD). Txawm li cas los, muaj ib tug xov tooj ntawm qhov chaw nyob rau hauv uas ib tug cathode txoj sab ci raj yog tseem indispensable. Piv txwv li, nyob rau hauv high-precision oscilloscopes LCD yuav siv tsis tau. Txawm li cas los, ib tug tshaj plaws yog tseeb - cov kev kawm ntaub ntawv zaub ntaus ntawv yuav nws thiaj li ua rau tag nrho cov ua hauj lwm ntawm lub CRT. Nws yog ib tug teeb meem ntawm lub sij hawm.

Cathode txoj sab ci raj: keeb kwm ntawm tshwm sim

Lub discoverer yuav xav tias Yu Plucker, uas nyob rau hauv 1859 xyoo, txoj kev tshawb ntawm tus cwj pwm ntawm cov hlau nrog rau ntau yam sab nraud los, ib tug tshwm sim sab tawg (emission) ntawm elementary hais - electrons. Tsim particle beams tau hu ua cathode rays. Nws kuj kos mloog mus rau lub tsos ntawm pom emission ntawm tej yam tshuaj (phosphor) nyob rau hauv kev sib cuag nrog cov electron kab teeb. Niaj hnub nimno CRT muaj peev xwm sawv ntawm tsim muaj ib qho duab vim ob tug no discoveries.

Tom qab 20 xyoo, nws tau pom empirically hais tias cov lus tsa suab taw qhia txog lub txim liab electrons yuav tswj tau los ntawm ib tug sab nraud magnetic teb. Qhov no yog yooj yim piav qhia yog hais tias peb nco ntsoov hais tias qhov tsis zoo xwb muaj yus los tsiv sib nqus thiab hluav taws xob teb.

Nyob rau hauv 1895, Karl F. Braun refined tswj nyob rau hauv lub raj, thiab yog li yog tau hloov cov vector ntawm lub particle txaus coj tsis yog tsuas yog ib tug teb ntawm lub cev, tab sis kuj yog ib tug tshwj xeeb daim iav uas yuav tau tig, uas qhib tshiab kiag li prospects rau kev siv ntawm cov invention. Nyob rau hauv 1903 godu Venelt muab tso rau hauv lub raj cathode electrode nyob rau hauv daim ntawv ntawm ib tug kheej kheej, ua rau nws tau los tswj cov kev siv ntawm cov tawm txim liab flux.

Nyob rau hauv 1905, Einstein formulated kab zauv rau xam cov photoelectric nyhuv, thiab tom qab 6 lub xyoo nws tau tau pom hais tias khiav duab hloov lwm lub tsev ntaus ntawv ntawm ib tug deb. Nqaj twb tswj los ntawm ib tug sib nqus teb, thiab cov capacitor them nyiaj ntawm brightness muaj nqis.

Thaum lub sij hawm pib ntawm zus tau tej cov thawj cov qauv ntawm cov CRT kev lag luam nws tsis yog npaj txhij los mus tsim cov ntxaij vab tshaus nrog ib tug loj kab pheeb ces kaum, yog li rau siab lo ntsiab muag siv raws li ib tug hais nruab nrab.

Apparatus cathode txoj sab ci raj

Txij li thaum lub ntaus ntawv tau raug muab hloov, tab sis cov kev hloov yog evolutionary tsuag, raws li muaj tsis muaj dab tsi fundamentally tshiab nyob rau hauv lub chav kawm ntawm kev ua hauj lwm muaj ntxiv lawm.

Khob lub cev yuav pib nrog ib tug conical raj extension txoj kev screen. Cov xim duab pab kiag li lawm, lub puab nto coated nrog ib tug tej kauj ruam peb hom phosphors (Liab, Ntsuab, Blue), muab ib tug luminescence xim nyob rau electron nqaj nkag mus rau. Raws li, muaj peb cathode (phom). Nyob rau hauv thiaj li yuav maj tawm lub electrons defocus thiab muab yam beam tam sim no yuav mus rau qhov kev kawm taw tes rau qhov kev tshuaj ntsuam ntawm cov cathode thiab cov phosphor txheej system txheej txheem steel tuav - daim npog qhov ncauj. Nws yuav muab piv nrog rau cov Stencil, txiav tawm tag nrho cov ruaj.

Nyob rau saum npoo ntawm lub rhuab cathode electron emission pib. Lawv maj mus rau lub anode (electrode nrog ib tug zoo xwb), kev cob cog rua rau lub conical feem ntawm lub raj. Ntxiv mus, beams yog teem tshwj xeeb kauj thiab poob mus rau hauv lub teb ntawm lub deflection system. Dhau los ntawm lub grate lub caij nplooj zeeg nyob rau hauv cov yam taw tes rau qhov kev tshuaj ntsuam, ua rau cov hloov dua siab tshiab ntawm nws kinetic zog mus rau hauv lub teeb.

computer technology

Saib nrog cathode-ray raj yog lug siv nyob rau hauv lub computer systems. Lub simplicity ntawm tsim, siab cia siab rau, yog xim, thiab tsis muaj kev ncua (tib yam millisecond teb matrix LCD) - qhov no yog lawv lub ntsiab kom zoo dua. Tsis ntev los no, txawm li cas los, raws li twb tau hais, lub CRT yog moog ntau yig thiab ergonomic LCD saib.