| 摘要 |
One of technical tasks to be achieved by an embodiment of the present invention is to provide a light-emitting device with a direct driving method by an alternating current, which is capable of modifying an output luminous flux easily. An aspect of the present invention provides a light-emitting device comprising: a circuit board and multiple light-emitting modules arranged on the circuit board and including first to n^th light source groups (n is an integer greater than or equal to 2), wherein each of the first to n^th light source groups includes at least one LED; a driving module for supplying a driving power to the multiple driving modules and determining the number of light source groups, which operate in the multiple light-emitting modules respectively, depending on the size of the driving power; and a module connecting part for connecting, in parallel, the first to n^th light source groups, which are included in any one light-emitting module among the multiple light-emitting modules, to the first to n^th light source groups, which are prepared in a light-emitting module other than the one light-emitting module, respectively to be able to be attached and detached. |
