Cold Cathode Lamp
Ccfls are used in a number of different specialty applications such as cold weather lighting display back lighting and signage. A cold cathode fluorescent lamp ccfl is a type gas discharge lamp similar to linear fluorescent or compact fluorescent lamps.
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Cold cathodes or cold cathode fluorescent lights ccfls are very similar to a normal fluorescent tube used in lighting many offices and signs.
Cold cathode lamp. A ccfl power supply that operates from 2v to 6v is detailed in figure 35 9. These are different in that they do not require a large high voltage ballast but they rather run cold with small inverters that amplify voltage to activate a paint coating inside of the tube. Inside the lamp end of a preheat bi pin lamp.
Our cold cathode luminaires have no equal in the superiority of the lighting effect color consistency evenness of illumination or dimming compatibility. This precludes lower power operation from 2 or 3 cell batteries often used in palmtop computers and portable apparatus. Optoelectronics ship same day.
A cold cathode is a cathode that is not electrically heated by a filament. Cold cathode germicidal ultraviolet lamps tubes and bulbs ster l ray cold cathode germicidal lamps are instant starting and utilize a large cylindrical cathode instead of a tungsten filament. A fluorescent lamp or fluorescent tube is a low pressure mercury vapor gas discharge lamp that uses fluorescence to produce visible light.
Optoelectronics lamps cold cathode fluorescent ccfl uv are in stock at digikey. Due to this construction the lamp is not adversely affected by frequent starting and the life is considerably in excess of other lamp types. Tcp 8g2508cl cold cathode decorative g25 40 watt eq.
Most cold cathode fluorescent lamp ccfl circuits require an input supply of 5v to 30v and are optimized for bulb currents of 5ma or more. Mainly but not exclusively used for indirect cove lighting our innovative product line utilizes the unique end to end illumination feature of time proven cold cathode lamp technology. A cathode may be considered cold if it emits more electrons than can be supplied by thermionic emission alone.
It is used in gas discharge lamps such as neon lamps discharge tubes and some types of vacuum tube. In this lamp the filament is surrounded by an oblong metal cathode shield which helps reduce lamp end darkening. Cold cathode lamps have no thermionic emission coating to wear out and can have much longer lives than hot cathode thermionic emission tubes however cold cathode lamps are less efficient than hot cathode lamps lamps because the cathode fall voltage is much higher see resources.
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