Remote controls and IrDA devices use infrared light - emitting diodes ( LEDs ) to emit infrared radiation which is focused by a plastic lens into a narrow beam .
These devices usually conform to standards published by IrDA , the Infrared Data Association .
Remote controls and IrDA devices use infrared light - emitting diodes ( LEDs ) to emit infrared radiation which is focused by a plastic lens into a narrow beam .
These devices usually conform to standards published by IrDA , the Infrared Data Association .