What is a cold cathode fluorescent lamp? Introduction to the light-emitting principle of a cold cathode fluorescent lamp
A cold cathode fluorescent lamp (CCFL) is a light source that uses high Piezoelectric excitation of the mercury vapor produces ultraviolet light, which then excites the fluorescent coating inside the tube to emit visible light. The principle is similar to that of neon lights.
Cold cathode lamps, the light-emitting principle is basically the same as that of fluorescent lamps (fluorescent lamps). That is, “gas discharge tube” + “fluorescent paint”, two stages. Cold cathode lamps: usually use an inverter (inverter) to generate a higher voltage to achieve the voltage required for gas discharge. Because the voltage is higher and the current at the same power is relatively lower, the temperature is lower and the life is longer.
Many LCD monitors use CCFLs as backlight components, and some chassis retrofits also use them.
In the lighting industry, the term usually refers to light-emitting tubes over 20 mm in diameter that use 120 to 240 microamps of current. Larger products are often used for general lighting purposes. [1] [2] Neon lights refer to products with a diameter of less than 15 mm and a current of about 40 microamps. This product is usually used as an indicator.
