CCFL Product Info
CCFL LAMPS - Plazmo is the largest supplier of CCFL (Cold Cathode Flourescent Lamp) lamps in North America. We currently have over 1,000,000 CCFL backlights in stock. Yes, you read that right, over 1 million premium LCD backlights in stock and ready to ship.
Our stock consists of hundreds of different sizes of raw Cold Cathode Fluorescent Lamps (CCFL's) available in diameters from 1.8mm - 6.0mm, and lengths from 40mm all the way up to 1,400mm. Additionally, we stock over 200,000 complete LCD backlight assemblies consisting of hundreds of different stock LCD backlight assemblies for many of the most common LCD screens from manufacturers such as AUO, Sharp, Samsung, NEC, LG, Chi Mei, Chunghwa, Sanyo Torisan, Hitachi, Optrex, Toshiba and many, many more.
We specialize in precision color matching technology utilizing the latest in testing equipment to allow us to both analyze and produce any color CCFL back light required. This includes the full spectrum of white lamps commonly used in various LCD screens as well as specialty color, UV, and infrared lamps used in a wide range of applications.
In addition to our standard CCFL Lamp offerings, we have complete engineering and manufacturing capabilities. We can make any type of CCFL backlight you might need! If you have an old obsolete LCD or even a new uncommon LCD requiring a specific or custom backlight, we can help you. We commonly make new specialty backlight lamps for all LCD applications, including straight and shaped lamps including C, U, L, and M shape lamps. In short, if you don't find the perfect solution for your LCD backlighting needs on our website www.CCFLwarehouse.com, just give us a call or send us an email with your specific needs.
HIGH VOLTAGE WIRE & HARNESSES - To compliment our vast array of CCFL backlights we have all of the most common CCFL wire harnesses used in LCD backlighting. We stock UL rated wire harnesses which include connector types from companies such as JST, JAE, Molex, Honda, and many more. We also stock all of the components to make your own custom harnesses such as High Voltage CCFL lamp wire, terminals, connectors, shrink tube, you name it. If you need a CCFL wire harness different from those found at www.CCFLwarehouse.com, feel free to give us a call and send us an email direct. We can make practically anything you might need in relation to backlights. Whether you are a small LCD repair facility or a large OEM...We are the experts, and we are here to help.
SILICONE END CAPS - To say we have a lot of different Silicone CCFL end caps would be an understatement. We stock hundreds of different model CCFL silicone end caps. These include a variety of single, dual, and triple LCD backlight lamp assembly varieties. Not all of these are available direct from our website, however feel free to contact us should you need a specific cap that you do not see, as there is a good chance we have a compatible cap available. In the rare occurrence that we do not, no problem, we can custom manufacture any silicone cap that might be needed. Feel free to contact us directly for more information on having custom CCFL silicone end caps made; we are here to help!
E-mail wholesale inquiries to: firstname.lastname@example.org
Or give us a call direct at +1 (402) 330-2222, 9am to 5pm CT, Monday - Friday
FURTHER BACKGROUND INFORMATION ON CCFL: CCFLs have been used for many years as a backlight source. They typically consist of a hollow glass cylinder, 2 to 10 mm in diameter, internally coated with a phosphorescent material, and filled with a noble gas (usually argon). The tube is then sealed at both ends. An iron-nickel electrode is located at each end of the tube.
CCFLs operate on high voltage AC. When the high voltage is applied, the resulting arc ionizes the internal gas producing ultraviolet energy. The ultraviolet energy excites the phosphor lining producing light in the visible (400 to 700 nm) range. The makeup of the phosphor determines the color temperature of the output. Typically the resulting color temperature is in the 2800 - 3200K range (warm to standard white).
As most systems that use LCD panels run on DC, the DC must be converted to AC to power the lamp. An inverter is typically used to create the high voltage AC. Moreover, CCFLs require constant current, not constant voltage. Also the strike voltage (the voltage at which the tube initially lights) of the CCFL is different than the sustaining voltage. An inverter that is designed to power an LCD CCFL will typically run at about 50 kHz. It must be matched to the specifications of the CCFL, particularly the current, strike voltage, and operating voltage.
When power is applied to the inverter, it starts by ramping up the output voltage until the CCFL ‘turns on’ (an arc strikes). The strike voltage may be several hundred volts higher than the sustaining voltage. After the tube strikes (identified by current flowing), the inverter drops the voltage until the rated current is flowing (typically around 5 to 7 mA). For example, a CCFL may have a strike voltage of approximately 1200 V, an operating voltage of approximately 800 V, and an operating current of 6 mA. The power draw would then be 4.8 watts. There is protection built into the inverter such that if the tube does not strike within a few hundred volts over the normal strike voltage, the tube is considered dead.
The life expectancy of CCFLs as used in backlights has evolved to around 50,000 - 60,000 hours. CCFLs rarely exhibit catastrophic failure like incandescent bulbs. Rather the tube slowly dims over time due to phosphor erosion. The useful life for all backlights is defined as when the light output from the tube reaches half of its initial brightness. Useful life is quoted at a specified ambient temperature and current. Increasing the current will decrease the life expectancy but will increase the brightness. The color temperature of the tube is not usually affected by age.
In many LCD panels, the CCFLs may be replaced if they have reached the end of their useful life. CCFLs typically have low heat generation, about 6-8 watts per tube, with most LCDs for the embedded market using 4 or less tubes. The heat is spread over the surface area of the tube easing heat dissipation. However, when many (greater than 4) CCFLs are used together in an enclosed panel, overall heat dissipation should be taken into account. The optimum ambient temperature range for best efficiency and brightness is 77 to 104°F (25 to 40°C). Depending on the design of the tube, it may operate at temperatures from -22 to +185°F (-30 to +85°C); however performance may be affected at either end, especially the lower end. At low temperatures the brightness decreases and the strike voltage increases. The typical efficiency of CCFLs is in the range of 70 to 90 lumens per watt, although with the competition of LED backlights, new advances have been made to boost efficiency.