negative electrode
fluorescigenic
Lamps (cold cathode fluorescent lamps) have the advantages of high power, high brightness and low energy consumption, and are widely used in display and lighting fields. It is filled with inert gas (including some mercury vapor) and has a fluorescent layer on its inner wall. It looks like a fluorescent lamp in appearance and a little like a neon lamp in the city. CCFL tube has the advantages of small tube, simple structure, small surface temperature rise and high surface brightness, and can be easily processed into various shapes (straight tube, L-shaped, U-shaped, annular, etc.). ). It has the advantages of long life, good color rendering and uniform light emission, so it is also an ideal light source for TFT-LCD, which is widely used in advertising light boxes, scanners, backlights and so on.
Before CCFL, EEFL backlight technology was widely used. CCFL backlight technology and WLED below are very mature technologies at present, while RGB
At present, LED is not mature enough, to be exact, it requires higher design, so it is difficult for many third-rate manufacturers to design good quality RGB.
LED backlight display.
Advantages of CCFL backlight screen: low cost, simple manufacturing process and mature technology.
The shortcomings of CCFL backlight screen: short life (fast aging), low luminous efficiency (power consumption), low brightness uniformity, low color purity, poor color gradation, environmental protection, large volume, high driving voltage and shock resistance.