They are versatile and efficient and feature exceptionally long life in comparison as well. When considering using a Cold Cathode Fluorescent light bulb for your project, keep in mind that they can be used as a direct replacement for incandescent bulbs in many applications, and will reduce energy costs in such situations drastically. To it inherent with a dimming function much, much better than the HCFL’s thin Furthermore, the metal thimble of a CCFL can withstand the abuse caused SinceĬCFLs do not require their cathodes to be heated to nearly as high a temperatureĪs standard fluorescent bulbs, they are able to be dimmed to a lower light Because of this, HCFL bulbs are not idealįor applications where dimming is needed – like in the casino example above. Keep the HCFL bulb lit, and if the temperature within the tube dips too low Regulate the flow of energy into the bulb (voltage), and dimming the bulb Image credit: travelview – Ĭan a cold cathode light bulb be used with a dimmer?Ĭontrary to a standard Fluorescent, CCFL bulbs are muchĮasier to dim due to their design. The Flamingo Hotel and Casino in Las Vegas, Nevada. They are even used by casinos in their grand displays and signs that light up the Las Vegas strip, drawing you in and showcasing the magic that awaits you inside! As such, CCFLs are a prime choice in lighting for laptop displays, cell phone and tablet screens, computer monitors, and TVs. The solid metal thimble which makes up each end of a CCFL tube can withstand deterioration from shock and vibration much better than a tungsten filament, making it more durable and able to weather a wider range of uses that would otherwise render a HCFL bulb useless, such as rapid on-off cycles. See where the name “cold cathode” came from.īecause a CCFL does not use a filament to produce heat and excite the mercury within its tube, they are much hardier in their design than a hot cathode (HCFL) light bulb, which uses a thin tungsten coil. To a standard Fluorescent bulb however, which heats up to around 900°, one can Heat up to roughly 200° F when in use, which is a far cry from being “cold”. Just not as much as a regular fluorescent or an incandescent. Light is energy and energy is generated by movement, and movement causesįriction, and friction generates heat. That the bulbs are going to be cold when in use. Now, I know with a name like “cold cathode” you would think Where does the “cold” part come into play? Starting voltage than a standard CFL, but the electrical current is lower. CCFLs use cathodes without a filament,Īnd instead rely upon the voltage potential present within the tube to activate Means they operate similar to a standard fluorescent lamp, by exciting electrodes,īut they just go about it differently. Utilizes both fluorescence and electron discharge in order to produce light. Light bulb? A cold cathode fluorescent lamp (CCFL) is a lighting system that ![]() This paper experimentally examined the etching utilizing the developed single grid rf ion source.Let’s start with the obvious question: what is a cold cathode We have proposed a bucket-type ion source which uses a microwave plasma cathode in place of a conventional filament. The advent of better filamentless ion sources is desired due to frequent utilization of reactive gases. (auth) « lessĪ large diameter and long-life ion source is considered desirable for plasma processes. But in higher ion beam current (about 250 mA) the efficiency decreases. At an optimum ratio r/d the electrical efficiency is about 90 percent and the divergence of the beam is 5$sup 0$ in low ion beam current (about 150 mA). ![]() The ratio r/d of the radius of extraction aperture to the distance between the positive and negative electrode is varied. 400 apertures are made by the photo- etching method. The multi-aperture electrodes are of copper 0.5 mm thick and 4 cm in diameter. This source is operated steady state at 0.5 A with ion energy of 0.5 to 1 keV. The temperatures of the plasmas are about 2 to 3 x 10$sup 40$K. The densities of hydrogen plasma and argon plasma are more » more than 10$sup 12$/cm$sup 3$ and more than 10$sup 13$/cm$sup 3$, respectively. The plasma diameter (2 to 4 cm in diameter) is controlled by the position of line cusp field near the cathode. ![]() High density, highly ionized, large uniform plasma is produced by glow discharge even with low discharge current. This plasma source consists of a thin grid in front of a cathode and of a large cylindrical anode mounted close to the extraction electrode. Experimental results are given for a new type of plasma source and for the beam efficiency of a multi-aperture three-electrode extraction system at energy 500 to 1000 eV.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |