In one aspect of the present invention, a distance to an object in a monitoring area can properly be measured using a laser beam. A plurality of convex lens regions (d1-d9) are horizontally provided in a light exit surface of a light projection optical sys...

The invention improves efficiency of a DC-DC converter. When it is determined that a high-voltage battery is not being charged in Step S1, a switching frequency of a switching circuit of the DC-DC converter is set in Step S4 based on an output current of t...

A breakdown of a load caused by abnormality of a high-voltage battery is prevented in starting supply of power from the high-voltage battery (111) to each load. In starting the supply of the power from the high-voltage battery (111) to a DC-DC converter (1...

A voltage drop of an output voltage of a DC-DC converter, caused by a wiring resistance, can properly be compensated at low cost, The DC-DC converter is connected to a low-voltage battery through an ignition switch and started up by the ignition switch. A ...

The invention provides a photo detection device (100) that can facilitate assembly while realizing miniaturization. The photo detection device comprises an illuminance sensor (1), a microcomputer (2) for controlling a headlight and a taillight based on a d...

The present invention relates to a power supply system (1) comprising a first battery (11) for supplying an electric power at first voltage, a second battery (15) for supplying an electric power at second voltage lower than the first voltage, a voltage con...

Charge information based upon predictions is displayed even when a portable device and an in-vehicle device cannot communicate with each other, to give benefits to a user. During charging of a battery, charge characteristic data on the battery is transmitt...