| 摘要 |
To provide a lighting device which is enabled to light a lamp of an incandescent bulb or the like in high luminance by a battery to be amounted on a vehicle. A lighting source lighting device 10 includes: an inverter 11 for converting a direct current from a vehicle-mounted battery 15 into an alternating current; and current adding means 13 for adding the direct current from the vehicle-mounted battery 15 and alternating current generated by the inverter 11, to supply a light source 14, such as a head lamp, with the added electric current. In this construction, the light source 14 is driven with the electric current containing the direct current and alternating current superimposed thereon so that the light source luminance microscopically changes with the period of the alternating current. With the naked eye, however, what light is trapped from the light source by the afterimage phenomena is a light at a luminous time so that the light source appears more luminous than at a time when only the direct current is applied.
|
