Abstract
As a rule, fluorescent lamps are filled with mercury and argon. As regards mercury dosiny into the bulb, the method which drops a few drops of liquid mercury through the exhaust tube has been employed. Such conventional method in production is of advantage to exhaust the gaseous impurities from the bulb but causes various defects of quality and characteristic. To eliminate such disadvantages, a manufacturing method which uses a mercury dispenser such as a strip mounted around the etctrode and releases mercury within the tube by means os R. F heating after sealing is introduced. Advantages using mercury dispenser are as follows:
(1) The quantity of mercury enclosed in the lamp is very precise.
(2) The pressure fluctuation of argon fill can be reduced, therefore it is possible to reduce the fluctuation of lamp life and to increse its average life.
(3) In addition, if the new production process is applied for conventional mercury dosing method it is possible to decrease the mercury contents of lamp.
