Closed-circuit TV (CCTV) tau tsim nyob rau hauv 1942 los ntawm German engineer, W alter Bruch, kom nws thiab lwm tus tuaj yeem soj ntsuam qhov kev tso tawm ntawm V2 foob pob hluav taws ntawm lub kaw lus ntiag tug.
Leej twg ua thawj lub koob yees duab kev ruaj ntseg?
Marie Van Brittan Brown Tsim Lub Koob Yees Duab Kev Nyab Xeeb thawj zaug.
Leej twg tsim kev ruaj ntseg?
Marie Van Brittan Brown (Lub Kaum Hli 30, 1922 - Lub Ob Hlis 2, 1999) yog tus kws saib xyuas neeg mob thiab tus tsim kho tshiab. Xyoo 1966, nws tau tsim ib qho kev ruaj ntseg hauv tsev nrog nws tus txiv Albert Brown, tus kws tshaj lij hluav taws xob.
Leej twg tsim tsev kawm ntawv?
Credit rau peb niaj hnub version ntawm lub tsev kawm ntawv system feem ntau mus rau Horace MannThaum nws tau los ua Tus Tuav Ntaub Ntawv Kev Kawm hauv Massachusetts xyoo 1837, nws tau tsim nws lub zeem muag rau cov kws qhia ntawv tshaj lij uas yuav qhia cov tub ntxhais kawm cov txheej txheem txheej txheem ntawm cov ntsiab lus yooj yim.
Leej twg invented peepholes?
Tus neeg pephole yuav tsis zoo ib yam ntxiv. Marie Van Brittan Brown muaj kev ntxhov siab hauv nws lub zej zog thiab tub ceev xwm tsis ntseeg. Yog li, nws tau coj teeb meem ntawm nws tus kheej txhais tes thiab patented lub tsev niaj hnub kev ruaj ntseg system. Tshaj li 50 xyoo tom qab, thev naus laus zis tau teeb tsa hauv ntau lab lub tsev thiab chaw ua haujlwm thoob ntiaj teb.