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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

cold cathode

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. For example, the backlights in earlier LCD screens were cold cathode fluorescent tubes, which were later replaced with LEDs (see CCFL). See cathode.
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References in periodicals archive ?
Mark Lessard, business development manager for Oxford Instruments, Boston, says the company has patented a cold cathode digital X-ray tube made from carbon nanotubes.
A number of applications are still using LCDs backlit by CCFLs (cold cathode fluorescent lamps) powered by DC/AC inverters.
Consuming less power and with no mercury, inherent in traditional cold cathode fluorescent lamps, ReadyScan LED technology enables the Epson V300 Photo to offer an environmentally-friendly scanning solution.
All signs include the options of having the units illuminated by florescent tube, cold cathode tube and tungsten halogen lamp technology.
"We believe this increase in brightness opens up new market opportunities for our customers and gives them a competitive alternative to today's Cold Cathode Fluorescent Lamp (CCFL) backlighting technology for large format LCDs."
Both LCDs feature LCD panel, driver Ics, control circuit, and two replaceable CCFL (cold cathode fluorescent lamp) backlights with a typical life of 50,000 hours, They also provide a wide viewing angle, reverse scan capability, an operating temperature of 0[degrees]C to 60[degrees]C, and AGLR (anti-glare, low reflection) surface treatment.
The upper ring houses four curved cold cathode tubes each nearly 1.5m long.
The Skion system replaces the gun with a flat oxidized-cesiated-diamond film, which performs as a cold cathode electron emitter structure placed a short distance behind the phosphor screen.
makes low-cost, compact gauges and controllers, including capacitance, piezo, Pirani, cold cathode, and Full-Range gauges.
of Houston is developing a diamond cold cathode electron source used in flat-panel display screens.