| 摘要 |
PROBLEM TO BE SOLVED: To control a plurality of light emitting modules individually, and reduce wirings to thereby reduce a manufacturing cost, in a light emitting module device. SOLUTION: The light emitting module device 1 includes a power line 3 for supplying power to the light emitting modules 2 and a signal generating unit 43 for generating a control signal. The power line 3 is shared among the plurality of light emitting modules 2 and has switches 31 and 32 for energization/de-energization of each light emitting module 2. The signal generating unit 43 controls opening and closing of the switches 31 and 32, individually, and its opening and closing control includes a light emission period in which the light emitting modules 2 are made to emit light and a quenching period in which the control signal is superimposed on the power to be supplied to each light emitting module and the light emitting modules 2 are made to quench light so long as there is a control signal to be sent. The control signal is superimposed on the power to be supplied to each light emitting module 2, so that the light emitting modules 2 can be controlled individually. Moreover, the power line 3 can be mode available as a communication line and the power line 3 is shared among the plurality of light emitting modules 2, so that the wirings can be reduced. COPYRIGHT: (C)2011,JPO&INPIT |
