A method and device of geographically tagging images by capturing an image, determining a position based on detection of satellite signals and a wireless network signal, and tagging the image with the determined position is provided. The light conductor plate has an incident surface for a light from the light source, a light emitting surface for emitting the input light to the liquid crystal cell, and a plurality of dots constituted by small projecting portions or small recess portions for changing a moving direction of the light from the incidence surface toward a direction of the light emitting surface. Here, the auxiliary dopant has a higher band gap energy than the host. The system further produces one or more results which indicate an assessment of collision between the primary and non-primary principals. The pin can also be extendable through a pre-existing hole formed in the at least one seat bracket thereby preventing the at least one seat bracket from releasing from the floorboard of the vehicle. Furthermore, the incoming wavelength of a time frame determines to which output port the data units in this time frame will be switched, while the new wavelength determines to which output the data units in this time frame will be switched in the next switch on the route.