Low-pressure mercury vapor discharge lamp having determined probability of failure
AssigneeKoninklijke Philips Electronics N.V.
InventorHerman Gielen
Life of this patent
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Abstract
Low-pressure mercury vapor discharge lamp has a discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and an inert gas in a gastight manner. The discharge vessel comprising electrodes (20a; 20b) arranged in the discharge space for maintaining a discharge in the discharge space. According to the invention, the probability of failure of the low-pressure mercury vapor discharge lamp being substantially determined by one of the electrodes. As upon igniting the low-pressure mercury vapor discharge lamp the ignition-related events influence the electrodes, preferably, the ignition-related events substantially are prevented affecting the one electrode.
Claims12
A low-pressure mercury-vapor discharge lamp comprising:
- a discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and an inert gas in a gastight manner,
- the discharge vessel (10) comprising electrodes (20a;
- 20b) arranged in the discharge space (13) for maintaining a discharge in the discharge space (13),
- the probability of failure of the low-pressure mercury vapor discharge lamp being substantially determined by one of the electrodes (20a).
Dependencies are inferred from the claim text.