Patent ID: 8564215
Filing Date: 2013-10-22
Classification: H05B,Y02B

Abstract:
1. A light emitting module device comprises: a plurality of light emitting modules; a power line through which supply power needed for the plurality of light emitting modules to emit light is supplied to the plurality of light emitting modules; and a signal generation unit which generates a control signal for setting the corresponding light emitting module, wherein the power line is shared by the plurality of light emitting modules, the power line has switches which turn on or off current conduction to each of the plurality of light emitting modules through open/close operations, the signal generation unit generates a signal for controlling the switches such that the switches are individually opened or closed, in the open/close control, a light-emission period and an extinction period are provided, in the light-emission period, the corresponding switch is closed to cause the corresponding light emitting module to emit light, in the extinction period, the corresponding light emitting module is extinguished, and if there is a control signal to be transmitted to the light emitting module, the corresponding switch is opened or closed, whereby the control signal is superimposed onto the supply power, and each of the plurality of light emitting modules has a control unit which reads the control signal superimposed onto the supply power and which controls the light emitting module such that the light emitting module is lit up based on the read control signal.