A cold cathode is a cathode in a gas-filled electron tube that is not heated by a filament. The voltage potential within the tube is sufficient to ionize the gas and cause the current to flow.

Micro-X cold cathode tubes use carbon nanotubes to emitelectrons and do not require oil to regulate heat. How Cold Cathode X-ray Technology Differs from Conventional X-rays In traditional X-ray ...

In this case, only four of the eight on the board are used to control red, white, blue, and green cold cathode tubes. The video after the break shows the device randomly rotating through different ...

In this case, it’s a cold cathode audio visualizer, powered by fluorescent tubes doing unexpected things. The build details are a little scant, but we were able to coax an imgur album of [James ...

The cathode tube was a prime example. By switching on some voltage, scientists could make fluorescent streams of electricity travel from the bottom part of a glass tube to the top -- but no one ...