A personal identification system, which uses a vein pattern of a finger, optimizes the amount of light of a light source based on a captured finger image and emphasizes the vein pattern during image processing for identification. According to an embodiment, phosphor layers fabricated by filling phosphor layer pattern holes within an area of the vertical frame with a phosphor solution are detached from the phosphor layer pattern holes by applying force downwardly or upwardly in a vertical manner. The assembly includes a cover and a shield secured on the cover. A risk of establishing the new network connection outside of the tunnel is determined based on a plurality of predefined criteria. A down command execution decision unit compares the number of received down commands with the number of executed down commands, and determines whether to execute the down command according to the comparison result. Therefore, the force is introduced perpendicular via the center sleeve sliders, and absorbed via the supporting plate or moving identification plate.