| 摘要 |
<p>A low pressure metal vapour discharge lamp having an outer glass envelope (1) defining a closed discharging space an inner glass tube (2) disposed within said envelope (1) and having an open end (2 min ) and a closed end, a cathode (4) disposed within said tube (2) and a plurality of anodes (5,5 min ) disposed within said envelope (1) outside said tube (2). In order to provide discharge distributed over most of the discharging space, the voltage causing discharge is provided simultaneously to both or all the anodes (5,5 min ). through a discharge current shunting device (10). The discharge current is forcibly shunted to all anodes and a plurality of discharge plasmas are generated simultaneously. To prevent flicker, means e.g. notches (6,6 min ) in the tube (2), a partition member (1 min ,14,15) or filler material (19) may be provided to fix the locations of the disclarge paths to stabilize the plasmas.</p> |
