What is the difference between LCD and LED technology?

A liquid crystal display (LCD) is a thin, flat electronic visual display that allows information such as automated programming settings such operating hours and days, number of days to refill or battery replacement, to be displayed. This information makes maintenance easier to manage.
A light-emitting diode (LED) is a light-emitting source which is used as an indicator lamp. These are seen as flashing coloured lights on Hygiene Vision dispensers, indicating active operation or low battery life.