It's true that LEDs can help illuminate your life in all kinds of ways. You can use them to light your home, your garden, your pool; they're used in cars, on planes, streetlamps and in almost every civic application you can think of. But LEDs can also emit light waves that are invisible to the human eye: infrared waves. Infrared (IR) LEDs are most often the types of lights used in remote control devices and in security systems across the globe, including covert devices used by the US Military.
Infrared LEDs feem ntau yog siv nyob rau hauv lub koob yees duab kev ruaj ntseg, tso cai rau lub koob yees duab los ntes ob hnub thiab hmo ntuj dluab. Lub teeb infrared tsis pom ntawm tib neeg lub qhov muag, tab sis raug tso tawm los ntawm txhua yam uas ua rau muaj cua sov, xws li tib neeg lub cev lossis lub cav tseem - lub cav sov. Raws li tsis pom kev hmo ntuj tsom iav, uas tsuas pom lub teeb infrared, Infrared lub koob yees duab ob leeg ntes thiab tawm lub teeb infrared raws li lub teeb pom kev zoo. Cov koob yees duab infrared feem ntau muaj lub kaw lus sensor uas tuaj yeem saib xyuas lub teeb theem hauv cheeb tsam kaw. Raws li lub ntuj lub teeb theem poob, lub sensor yuav xam ntau npaum li cas lub teeb infrared xav tau los teeb duab, thiab infrared LEDs yuav tig rau raws li. Lub zog ntawm IR LED strips yuav nce zuj zus mus txog thaum nws tsaus nti tag nrho, thaum lub sijhawm ntawd cov duab yuav pom hauv 100 feem pua IR teeb. Qhov tsuas yog qhov tsis zoo rau IR thev naus laus zis yog tias cov duab tua hauv IR tsuas tuaj yeem saib dub thiab dawb xwb.
Infrared LEDs are also used in most remote-control devices; an infrared beam carrying instructions in binary code is sent from the remote control to the device (your television or your child's Tonka truck), which receives these commands and performs the action given.
