The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric displays. Each segment in the display module is multiplexed, meaning it shares the same ...

i.e. from the anode terminal to the cathode terminal. But if the voltage is reversed, current won’t flow in the opposite direction. Et voila, a diode is born. An LED is a diode that emits light.

We fabricated a series of small-molecule fluorescent OLEDs, including a control device with an ITO anode and several experimental devices with multilayered graphene anodes (two, three or four ...