Dynamic Light Emitting Diode (LED) display for giving train information at station has rectangular frame with mitered corners and watertight electrical connections in bottom frame member

摘要

The display assembly (2) has a rectangular aluminum or copper frame (2a) with a long horizontal top (3) and bottom (4) side and short vertical sides (5,6). The sides of the frame are mitered together at their ends. There are transparent sheets (9,10) between the frame members to cover the LEDs and at the sides of the frame. There are waterproof electrical connections (7,8) in the bottom frame member.