| 摘要 |
PURPOSE:To make a fluorescent lamp to have high brightness by placing each of other electrodes, for making discharge toward a common electrode, at each corner of a luminous room, whose plane shape is a quadrangle, so as to extend the length of each discharge path. CONSTITUTION:A plane quadrangle luminous room 11 is partitioned into four parallel discharge paths 13a to 13d by a cross partition plate 12, and each forms luminous small room. And a common electrode 15 is provided at the bottom center of the luminous room 11. Other electrodes 16, for making discharge toward the common electrode 15, are placed at corners of the small luminous rooms 13a to 13d respectively. Accordingly, the distance between each electrode l1, for example, 16b and the center of the common electrode 15 is longer than l2, the distance between conventional electrode 17 and the center of the common electrode 15 by L. That is, each discharge path can be extended by L so that more wattage of power can be input to the fluorescent lamp, thus high brightness of the fluorescent lamp can be obtained to that extent. |
