A commercial trailer camera interface for providing an apparatus and method for connecting video cameras (42) and data buses (41) from a trailer (40) to a tow vehicle (50). The trailer camera interface generally includes a nose box (10), which affixes to the front of the trailer, a tail box (20) which affixes inside the rear of the tow vehicle, and an umbilical cable (30) which connects the nose box to the tail box. The nose box encodes the video signals, for example as differential signals, for transmission over the umbilical cable and the tail box decodes the received encoded signals to recover the video signals. The nose box and the tail box may each include a plurality of video camera connectors (11). The tail box may include a video handler (53) to display or record or stream the video signals.

A vehicle-mounted stereo camera device that achieves high-precision distance detection is provided, including a left camera and a right camera disposed to cause visual fields to overlap each other, a first enclosure and a second enclosure that enclose the left camera and the right camera and have portions within the visual fields of the left camera and the right camera, respectively, and a stereo processor that calculates a distance to a body outside the vehicle based on images captured by the left camera and the right camera and on positions of the left camera and the right camera on the vehicle. The stereo processor detects displacement amounts of the left camera and the right camera based on amounts of change in positions of the first enclosure and the second enclosure within the visual fields of the left camera and the right camera, and changes a cutout position in the images captured by the left camera and the right camera.

Provided are a power supply control device, which is configured such that a current supplying capacity required by a power supply means can be reduced even when power is supplied to a prescribed external device, and an instrument device equipped with the power supply control device. The power supply control device is equipped with: a first power supply means (1000) for supplying power to a pointer instrument (30); a first control unit (100) that operates with power from the first power supply means (1000) and controls driving of the pointer instrument (30) and supply of power from the first power supply means (1000) to the pointer instrument (30); and a second control unit (200) for controlling supply of power from the first power supply means (1000) to an external memory (500). Upon receiving a prescribed command, the first control unit (100) causes the first power supply means (1000) to stop supplying power to the pointer instrument (30), and the second control unit (200) causes the first power supply means (1000) to start supplying power to the external memory (500) in response to the stoppage.