Exceptionally low power consumption of e-paper displays in comparison to standard LCD TFT modules results from the two characteristics of this technology. Firstly, EPD (Electronic Paper Display) does not require backlight what significantly reduces energy consumption. Secondly, e-paper consumes electricity only when changing the displayed content. It is a significant advantage over LCDs (the displayed content needs a continuous power supply in order to be visible) when it comes to energy efficiency.