Fluorescent lamp, method of manufacturing the same, and backlight unit having the same
View Patent ↗A fluorescent lamp that can be easily manufactured to provide high brightness and high efficiency, a method of manufacturing the same, and a backlight unit having the same are provided. First and second non-emissive glass tube are joined to an emissive glass tube coated with a phosphor, and first and second electrodes are formed on outer surfaces of the first and second non-emissive glass tubes. The first and second non-emissive tubes may have the same diameter as the emissive glass tube. The first and second non-emissive glass tubes are simply joined to the emissive glass tube, thereby reducing the manufacturing process and cost. The first and second non-emissive glass tubes are formed to be thinner than the emissive glass tube, thereby enhancing the brightness and efficiency of the fluorescent lamp.
1. A method of manufacturing a fluorescent lamp, the method comprising:
forming an emissive glass tube having a first thickness, a first diameter, and both opened ends;
forming first and second non-emissive glass tubes having a second diameter larger than the first diameter, a second thickness identical to the first thickness, and one opened end;
joining both ends of the emissive glass tube to the first and second non-emissive glass tubes, respectively; and
forming first and second electrodes on entire outer surfaces of the first and second non-emissive glass tubes,
wherein the first and second electrodes have a cap shape and cover entire circumferences of two joints formed by joining the both ends of the emissive glass tube to the first and second non-emissive glass tubes,
wherein the first and second non-emissive glass tubes are made of the same material as the emissive glass tube,
wherein each of the first and second non-emissive glass has a opening portion corresponding to the both ends of the emissive glass tube, and
wherein joining both ends of the emissive glass tube to the first and second non-emissive glass tubes performed using a gas torch or static electricity.
2. The method according to claim 1 , further comprising filling gas into an inner space defined by the emissive glass tube and the first and second non-emissive glass tubes.
3. The method according to claim 2 , wherein the filling of the gas is performed after the joining of the emissive glass tube to the first and second non-emissive glass tubes.
4. The method according to claim 2 , wherein the filling of the gas is performed after the forming of the first and second electrodes.
5. A method of manufacturing a fluorescent lamp, the method comprising:
forming an emissive glass tube having a first thickness, a first diameter, and both opened ends;
forming first and second non-emissive glass tubes having a second diameter larger than the first diameter, a second thickness smaller than the first thickness, and one opened end;
joining both ends of the emissive glass tube to the first and second non-emissive glass tubes, respectively; and
forming first and second electrodes on entire outer surfaces of the first and second non-emissive glass tubes in whole,
wherein the first and second electrodes have a cap shape and cover entire circumferences of two joints formed by joining the both ends of the emissive glass tube to the first and second non-emissive glass tubes,
wherein the first and second non-emissive glass tubes are made of the same material as the emissive glass tube,
wherein each of the first and second non-emissive glass has a opening portion corresponding to the both ends of the emissive glass tube, and
wherein joining both ends of the emissive glass tube to the first and second non-emissive glass tubes performed using a gas torch or static electricity.
6. The method according to claim 1 , further comprising forming a phosphor on the emissive glass tube.