Cold cathode fluorescent lamp tube with double layer lamp tube structure
A technology for cold cathode fluorescent lamps and fluorescent tubes, which is applied to parts of gas discharge lamps, discharge lamps, gas discharge lamps, etc., can solve the problems of scrapping, bursting, and restricting application prospects of fluorescent tubes, and achieves elimination of bursting and damage. The effect of burst breakage rate
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example 1
[0027] The inner fluorescent tube 3 of the straight cold cathode fluorescent tube is, for example, made of borosilicate glass with an outer diameter of 1.8 mm and a tube length of 250 mm. The electrode is filled with neon-argon mixed gas and mercury vapor inside the lamp tube. The outer glass tube 2 is for example made of borosilicate glass, with an outer diameter of 2.6 mm, an inner diameter of 2.0 mm, and a tube length of 255 mm. The tube end is sealed on a tungsten electrode, such as figure 2 shown. The gap between the inner and outer tubes is, for example, 0.1 mm, and there may be a very small portion of contact, and the gap is vacuumed, and the vacuum degree is 1-20 Pa. The cold cathode fluorescent lamp adopts a dedicated lighting circuit, its input voltage is, for example, 12V, the input current is, for example, 0.32A, the tube current is about 5.0mA, and the tube voltage is about 600V. In this example, the cold cathode fluorescent tube can emit about 40000cd / m2 surfa...
example 2
[0029] The inner fluorescent tube 3 of the L-shaped cold cathode fluorescent tube is, for example, made of borosilicate glass, with an outer diameter of 1.8 mm and a tube length of 420 mm. The inner wall is coated with fluorescent powder with a color temperature of 7000°K, and a tungsten-nickel welding electrode is arranged at the tube end. , The inside of the lamp tube is filled with a mixed gas of neon and argon and mercury vapor. Outer layer glass tube 2 adopts borosilicate glass for example, and outer diameter is 3.0 millimeters, and inner diameter is 2.1 millimeters, and tube length is 426 millimeters, and tube end is sealed on the tungsten electrode, as image 3 shown. The gap between the inner and outer tubes is, for example, 0.15 mm, and there may be a very small portion of contact, and the gap is vacuumed, and the vacuum degree is 1-20 Pa. The lighting circuit adopted by CCFL has an input voltage of 12.5 volts, an input current of 0.46 amps, a tube current of about 7...
example 3
[0031] The inner layer fluorescent tube 3 of the straight-tube cold cathode fluorescent tube is, for example, made of high borosilicate glass (expansion coefficient is about 3.2×10 -6 / °C), the outer diameter is 1.8 mm, the tube length is 140 mm, the inner wall is coated with fluorescent powder with a color temperature of 7000°K, the tube end is equipped with tungsten-nickel welding electrodes, and the inside of the tube is filled with neon-argon mixed gas and mercury vapor. Outer layer glass tube 2 adopts borosilicate glass (expansion coefficient is about 4.0 * 10 -6 / ℃), the outer diameter is 3.0 mm, the inner diameter is 2.1 mm, the tube length is 146 mm, and the tube end is sealed on the tungsten electrode, such as image 3 shown. The gap between the inner and outer tubes is, for example, 0.15 mm, and there may be a very small portion of contact, and the gap is vacuumed, and the vacuum degree is 1-20 Pa. The lighting circuit adopted by CCFL has an input voltage of 13.4V,...
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