A signal transceiving section transmits a transmission signal to a transmission path, each frame in the transmission signal is divided into a plurality of periods in a time axis direction, and the plurality of periods includes superimposing period for superimposing a superimposed signal. As a result, the video presenter, which is an optical image electronic device having mounted therein an embedded system dedicated to a device control, can respectively and simultaneously output any two different images to two different display units. The support platform is pivotally mounted to the terminating end of the frame assembly for being arcuately pivoted between a first, stowed position and a second, deployed position wherein the support platform is substantially perpendicular to the plane established by the frame assembly. The sensor control unit also includes two or more conductive contacts disposed on the housing and configured for coupling to two or more contact pads on the sensor. A controlled voltage component is operatively coupled the plurality of inverter circuits, and adapted to supply a desired supply voltage. The disclosed lock core includes a core body, a core sleeve, a core plug, and a side pin assembly including a side pin, a region pin, and a spring.