公开(公告)号：EP1976343A1

公开(公告)日：2008-10-01

申请号：EP07706810.4

申请日：2007-01-16

申请人： MATSUSHITA ELECTRIC WORKS, LTD.

发明人： HAMAMOTO, Katunobu c/o Matsushita Electric Works, Ltd. ,  MITUYASU, Kei c/o Matsushita Electric Works, Ltd. ,  KADO, Yosikazu c/o Matsushita Electric Works, Ltd. ,  MURAYAMA, Hirosi c/o Matsushita Electric Works, Ltd. ,  HIROSE, Hiroyuki c/o Matsushita Electric Works, Ltd.

IPC分类号： H05B41/24 ,  H05B41/392

CPC分类号： H05B41/2825 ,  H05B41/295 ,  H05B41/392 ,  H05B41/3922

摘要： In order to suppress cost of an initial investment by a user and running cost to the user to a low extent while substantially constantly maintaining an apparent illuminance, and further, to realize resource saving, in a case of using a fluorescent lamp FHF 32 as a discharge lamp La, a lamp supply power is started to be supplied from a value lower than 45W as rated electric power at an initial period of an operation of the discharge lamp, a light adjustment signal is changed in response to an accumulated lighting time so that the lamp supply power can be a value higher than 45W as the rated electric power on and after a rated lifetime of the discharge lamp La, whereby the lamp supply power (output of an inverter circuit 2) is adjusted. In the fluorescent lamp FHF 32, a light/electric power ratio becomes substantially constant when the lamp supply power is 41W to 55W, and accordingly, a light quantity is increased without impairing light emission efficiency of the discharge lamp La, and as a result, the apparent illuminance can be maintained substantially constantly.

摘要翻译： 为了抑制使用者的初始投入的成本，并且在大幅度地保持表观照度的同时向用户运行成本低，并且进一步实现资源节省，在使用荧光灯FHF 32作为 放电灯La，在放电灯的操作的初始期间，从低于45W的值作为额定电力供应灯供给电力，响应于累积的点亮时间而改变调光信号，使得 灯电源功率可以是放电灯La的额定电力和额定寿命后的高于45W的值，从而调节灯供电功率（逆变器电路2的输出）。 在荧光灯FHF32中，当灯供电功率为41W至55W时，光功率比变得基本恒定，因此在不损害放电灯La的发光效率的情况下光量增加，结果， 可以基本上恒定地维持表观照度。