LiFi thiab LED

Yog tsis muaj qhov tshwm sim ntawm lub xeev teeb pom kev zoo (SSL) yuav tsis muaj kev hloov pauv hauv kev sib txuas lus kho qhov muag wireless (OWC) thev naus laus zis. Lub plawv ntawm LiFi yog LED teeb pom kev zoo uas siv cov semiconductor diodes los tsim lub teeb. Thaum lub diode nyob rau pem hauv ntej biased (switched on) hla pn hlws ris, electrons nyob rau hauv n-hom semiconductor txheej thiab qhov nyob rau hauv p-hom semiconductor khaubncaws sab nraud povtseg ntws mus rau ib leeg thiab lub zog yog tso tawm nyob rau hauv daim ntawv ntawm lub teeb thaum lawv ua ke. Tsis zoo li emitting lub teeb los ntawm kev zoo siab ntawm qhov nruab nrab gaseous hauv lub hnab ntawv iav (piv txwv li, qhov muag teev), xws li cov teeb pom kev zoo ib txwm muaj, cov txheej txheem tawm ntawm lub teeb ntawm LED tshwm sim hauv lub xeev cov khoom lag luam thiab tuaj yeem tswj tau digitally tswj los ntawm kev tswj cov hluav taws xob. yam ntxwv ntawm kev tsav tsheb tam sim no. Qhov no txhais tau hais tias tsuas yog LEDs tuaj yeem ua haujlwm nrog zaus ntawm kev hloov pauv hauv qhov tshwj xeeb rau kev sib txuas lus pom. Txawm hais tias LiFi xa cov ntaub ntawv los ntawm kev hloov LEDs. Lub teeb pulses yog imperceptible rau tib neeg lub qhov muag vim hais tias qhov zaus ntawm cov "on" thiab "tawm" sequences yog siab heev uas lub qhov muag tsis pom qhov modulation los yog "flicker".