| 摘要 |
PURPOSE:To obtain a fluorescent lamp ingitor unit with a resistance ballast that can suppress the resistance ballast loss low, improve its circuit efficiency, and be suitable for energy saving by restraining the current value low. CONSTITUTION:In the figure, the left domainIof Point P indicates that the ballast loss increases as power consumption WL increases. On the contrary, the right domain II of point P indicates that the ballast loss increases even when WL decreases. This indicates that when a circuit is designed and the output of a fluorescent lamp is set to a value WLO, there are two operating points (P1, P2) of the fluorescent lamp from which the output can be obtained. In this case, when the operating point is assigned at Point P1 in the domainI, the ballast loss Q1 can be suppressed low and when the operating point is assigned at Point P2, the ballast loss Q2 is increased. For this example, the circuit current value should be preferably set belowIp in Equation (i). |
