| 摘要 |
A flat panel lamp has internal walls 23 to 29 forming a serpentine discharge path 15 to 22 between two internal electrodes 40 and 41. Two glow mode electrodes 45 and 46 in the form of interdigitated combs are laid on the outside of the front panel 44 of the lamp, on top of the walls. The internal electrodes 40 and 41 are connected to a first drive circuit 51; the glow mode electrodes 45 and 46 are connected to a second drive circuit 52, which drives them at a frequency of about 10 MHz. At high brightness, only the internal electrodes 40 and 41 are operative; at low brightness, only the glow mode electrodes 45 and 46 are operative: and at intermediate brightness the two sets of electrodes are alternately energized. <IMAGE> |
