Patent ID: 7180232
Filing Date: 2007-02-20
Classification: H01J

Abstract:
1. A low-pressure mercury vapor discharge lamp comprising: a light-transmitting discharge vessel ( 10 ) enclosing, in a gastight manner, a discharge space ( 13 ) provided with a filling of mercury and a rare gas, the discharge vessel ( 10 ) comprising discharge means for maintaining a discharge in the discharge space ( 13 ), the discharge vessel ( 10 ) being provided with a container ( 3 ) comprising an amalgam ( 2 ), the container ( 3 ) being provided with releasing means ( 4 ) for the controlled release of mercury vapor from the amalgam ( 2 ), the releasing means ( 4 ) being open during lamp operation when the temperature of the amalgam is lower than a predetermined temperature, the releasing means ( 4 ) being substantially closed when, during lamp operation, the temperature of the amalgam ( 2 ) becomes higher than the pre-determined temperature.