| 摘要 |
PURPOSE:To prevent malfunctions of an electronic circuit for illumination lighting, by receiving the illumination lighting light by a photovoltaic element such as a solar battery to compensate drop of the battery voltage. CONSTITUTION:When switch 10 is closed to light lamp 6, the illumination light is received by photovoltaic element 11 such as a solar battery to generate electromotive force in element 11 in the direction where the low potential-side power source terminal of compensated circuit part 9 is lower-potential at the view from the negative pole of battery 7, and voltage drop of battery 7 dependent upon internal resistance 8 caused by lighting of illumination 6 is compensated and prevented. Consequently, the voltage applied to circuit 9 connected in series through forward diode 12 is not dropped, and electronic circuits such as circuit 9 can be prevented from being stopped and being operated erroneously even for illumination lighting. |
