cold cathode

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cold cathode

[′kōld ′kath‚ōd]
(electronics)
A cathode whose operation does not depend on its temperature being above the ambient temperature.

cold cathode

A cathode in a gas-filled electron tube that is not heated by a filament in order to excite the electrons and cause current flow. The voltage potential within the tube is sufficient to ionize the gas in the tube and cause current flow. For example, the backlights in many flat panel LCD screens are cold cathode fluorescent tubes (see CCFL). See cathode.
References in periodicals archive ?
The term 'black frame insertion' refers to when you would blank an entire frame with cold-cathode tubes.
There are several inherent advantages for using a cold-cathode ionization sensor.
As its name implies, a cold-cathode gauge generates electrons by means of a high voltage that pulls them from a cold electrode.
The new Dell 30-inch monitor increases the coverage to 92 percent of the NTSC color space utilizing a Wide Cold-Cathode Fluorescent Lighting (W-CCFL) backlight that delivers gamers, photographers and digital media "prosumers" highly vibrant and vivid images such as deeper reds and crisper blues.
4W, and achieves a maximum luminance of approximately 220 cd/m, outperforming the higher-wattage displays equipped with cold-cathode fluorescence lamps.
Kyocera Industrial Ceramics Corporation announced that global parent Kyocera Corporation has released a new line of liquid-crystal displays (LCDs) that feature a unique light-emitting diode (LED) backlighting system instead of conventional cold-cathode fluorescent lamps (CCFLs).
LEDs are able to replace traditional cold-cathode fluorescent lamps (CCFLs) in the backlighting units of LCD televisions, offering advantages in terms of lifetime, environmental friendliness and most significantly enhanced color gamut," observed Asif Anwar, Director of Strategy Analytics GaAs service.
To serve the discriminating image-quality needs of the commercial market better, the PN-655 has a four-wavelength spectrum, cold-cathode fluorescent backlight that provides an enhanced color spectrum including deeper, more vibrant and vivid reds.
Currently, most flat-panel LCD television displays are backlighted using cold-cathode fluorescent lamps (CCFLs).
These LEDs provide a better color brilliance than conventional cold-cathode fluorescent lamps and deliver much greater picture vibrancy.
In 1999, MPS introduced the first integrated full bridge power IC solution for the cold-cathode fluorescent lamp (CCFL) backlight inverter marketplace.
All three Fairchild LEDs have distinct advantages over conventional cold-cathode fluorescent lamps (CCFL) and electroluminescent lamps (EL) for illumination in compact devices: they are smaller, more reliable, use dc (rather than ac) voltage, and do not require auxiliary circuitry.