Xaiv lub TV rau koj tus kheej, koj tus neeg koj hlub, los ntawm qhov kev xav ntawm kev tshawb fawb, tsis yog kev tshaj tawm

Nyob zoo txhua tus.

Kuv tau hais kom sau cov kab lus luv luv no los ntawm kev tsis sib haum xeeb txog kev xaiv TV.

Tam sim no nyob rau hauv cheeb tsam no - nrog rau hauv "megapixels rau lub koob yees duab" - muaj kev lag luam bacchanalia hauv kev nrhiav kev daws teeb meem: HD Npaj tau ntev tau hloov los ntawm Full HD, thiab 4K thiab txawm tias 8K twb dhau los ua neeg nyiam.

Cia peb xam nws - dab tsi peb xav tau tiag tiag?

Ib chav kawm geometry hauv tsev kawm ntawv thiab qee qhov kev paub yooj yim los ntawm Wikipedia yuav pab peb nrog qhov no.

Yog li raws li qhov no Wikipedia heev, qhov muag liab qab ntawm tus neeg nruab nrab yog ib qho cuab yeej tshwj xeeb uas muaj peev xwm ntawm ib txhij saib qhov chaw ntawm lub kaum sab xis ntawm 130 °-160 °, nrog rau qhov sib txawv ntawm lub kaum sab xis ntawm 1-2' (txog 0,02 ° - 0,03 °) . Qhov twg Kev ceev ceev tshwm sim ntawm qhov deb ntawm 10 cm (cov hluas) - 50 cm (feem ntau cov neeg 50 xyoo thiab laus dua) mus rau infinity.

Nws zoo li txias. Qhov tseeb, nws tsis yooj yim li ntawd.

Hauv qab no yog thaj tsam ntawm kev pom ntawm tus neeg lub qhov muag sab xis ( daim npav perimetric, cov lej ntawm qhov ntsuas yog angular degrees).

Lub txiv kab ntxwv qhov chaw yog qhov projection site ntawm fundus qhov muag tsis pom. Kev pom ntawm lub qhov muag tsis muaj cov duab ntawm lub voj voog tsis tu ncua, vim qhov kev txwv ntawm kev ntsia ntawm lub qhov ntswg ntawm sab nruab nrab thiab daim tawv muag saum toj thiab hauv qab.

Yog tias peb superimpose cov duab ntawm sab xis thiab sab laug ob lub qhov muag, peb tau txais qee yam zoo li no:


Hmoov tsis zoo, tib neeg lub qhov muag tsis muab qhov pom kev zoo tib yam thoob plaws lub dav hlau ntawm lub kaum ntse ntse. Yog lawm, nrog ob lub qhov muag peb tuaj yeem paub cov khoom nyob rau hauv qhov kev pab them nqi ntawm 180 ° nyob rau hauv pem hauv ntej ntawm peb, tab sis peb tuaj yeem paub lawv li peb-dimensional tsuas yog nyob rau hauv 110 ° (mus rau thaj chaw ntsuab), thiab raws li tag nrho cov xim - nyob rau hauv ib qho txawm. tsawg dua li ntawm 60 ° -70 ° (mus rau thaj tsam xiav). Yog lawm, qee cov noog muaj qhov pom ntawm yuav luag 360 °, tab sis peb muaj qhov peb muaj.

Yog li peb tau txais qhov ntawd ib tug neeg tau txais cov duab zoo tshaj plaws ntawm lub kaum sab xis ntawm 60 ° -70 °. Yog xav tau kev pab ntau dua, peb raug yuam kom "khiav" peb ob lub qhov muag hla daim duab.

Tam sim no - txog TVs. Los ntawm lub neej ntawd, xav txog TVs nrog qhov nrov tshaj plaws dav-rau-qhov siab piv li 16: 9, nrog rau lub vijtsam tiaj.

Ntawd yog, nws hloov tawm tias W: L = 16: 9, thiab D yog qhov screen kab pheeb ces kaum.

Yog li ntawd, nco txog Pythagorean Txoj Cai:


Yog li, xav tias qhov kev daws teeb meem yog:

• HD Npaj 1280x720 pixels
• Full HD muaj 1920x1080 pixels
• Ultra HD 4K muaj 3840x2160 pixels,

Peb pom tias pixel sab yog:

• HD Npaj: D / 720,88
• Full HD: D / 2202,91
• Ultra HD 4K: D / 4405,81

Kev suav ntawm cov nqi no tuaj yeem pom ntawm no

Tam sim no cia peb suav qhov kev pom qhov deb mus rau qhov screen kom lub qhov muag npog tag nrho cov duab.

Los ntawm daim duab nws yog tseeb hais tias


Txij li thaum qhov loj tshaj plaws ntawm qhov siab thiab qhov dav ntawm daim duab yog qhov dav - thiab lub qhov muag yuav tsum tau npog tag nrho qhov dav ntawm lub vijtsam - cia peb suav qhov pom kev deb ntawm qhov screen, coj mus rau hauv tus account tias, raws li qhia saum toj no, saib lub kaum ntse ntse. yuav tsum tsis txhob siab tshaj 70 degrees:

Ntawd yog: Txhawm rau kom lub qhov muag npog tag nrho qhov dav ntawm qhov screen, peb yuav tsum nyob deb tsis ze tshaj li ib nrab ntawm kab pheeb ces kaum ntawm lub vijtsam.. Tsis tas li ntawd, qhov kev ncua deb yuav tsum yog tsawg kawg 50 cm los xyuas kom meej haum rau cov neeg ntawm txhua lub hnub nyoog. Cia peb nco txog qhov no.

Tam sim no cia peb suav qhov kev ncua deb ntawm tus neeg yuav paub qhov txawv ntawm pixels ntawm qhov screen. Qhov no yog tib daim duab peb sab nrog lub tangent ntawm lub kaum sab xis, tsuas yog R nyob rau hauv cov ntaub ntawv no yog lub pixel loj:

Ntawd yog: ntawm qhov deb ntau dua 2873,6 pixel qhov ntau thiab tsawg, lub qhov muag yuav tsis pom cov nplej. Qhov no txhais tau tias, coj mus rau hauv tus account lub xam ntawm lub pixel sab saum toj, koj yuav tsum tau nyob rau ntawm qhov tsawg kawg nkaus nyob deb ntawm lub vijtsam rau daim duab kom zoo li qub:

• HD Npaj: D / 720,88 x 2873,6 = 4D, uas yog, plaub lub vijtsam kab pheeb ces kaum
• Full HD: D / 2202,91 x 2873,6 = 1,3D, uas yog, kwv yees li me ntsis tsawg dua ib thiab ib nrab kab pheeb ces kaum
• Ultra HD 4K: D / 4405,81 x 2873,6 = 0,65D, uas yog, me ntsis ntau dua li ib nrab ntawm kab pheeb ces kaum

Thiab tam sim no dab tsi nws tag nrho coj mus rau -

Cov lus xaus:

1. Koj yuav tsum tsis txhob zaum ze dua 50 cm rau qhov screen - lub qhov muag yuav tsis muaj peev xwm tsom rau cov duab ib txwm.
2. Koj yuav tsum tsis txhob zaum ze dua 0,63 lub vijtsam kab pheeb ces kaum - koj ob lub qhov muag yuav nkees vim lawv yuav tsum khiav ncig daim duab.
3. Yog tias koj npaj saib TV ntawm qhov deb ntau dua plaub kab pheeb ces kaum, koj yuav tsum tsis txhob yuav ib yam dab tsi txias dua HD Npaj - koj yuav tsis pom qhov txawv.
4. Yog tias koj npaj saib TV ntawm qhov deb ntau dua ib thiab ib nrab ntawm kab pheeb ces kaum, koj yuav tsum tsis txhob yuav ib yam dab tsi txias dua Full HD - koj yuav tsis pom qhov txawv.
5. Siv 4K tsuas yog xav tau yog tias koj saib ntawm qhov screen ntawm qhov deb tsawg dua ib thiab ib nrab kab pheeb ces kaum, tab sis ntau tshaj li ib nrab ntawm kab pheeb ces kaum. Tej zaum cov no yog qee yam ntawm cov khoos phis tawj saib xyuas lossis cov vaj huam sib luag loj, lossis lub rooj zaum sawv ze rau TV.
6. Kev siv cov kev daws teeb meem siab dua tsis muaj kev nkag siab - koj yuav tsis pom qhov txawv ntawm 4K, lossis koj yuav nyob ze rau ntawm qhov screen thiab lub kaum sab xis saib yuav tsis npog tag nrho lub dav hlau (saib point 2 saum toj no). Qhov teeb meem tuaj yeem daws tau qee qhov nrog lub vijtsam nkhaus - tab sis kev suav (ntau txoj hauv kev) qhia tias qhov kev nce qib no yog qhov tsis txaus ntseeg.

Tam sim no kuv xav kom ntsuas koj chav, qhov chaw ntawm koj lub rooj zaum uas koj nyiam, kab pheeb ces kaum ntawm lub TV thiab xav tias: nws puas tsim nyog them nyiaj ntau dua?

Tau qhov twg los: www.hab.com