| 摘要 |
The invention relates to an electronic display system. The display system has a number of signs all linked together and to a controller by a mesh radio network. Each sign is made up of modular display units. Each display unit has a frame with at least two display sections (front and back) and clear frosted cover over the display sections. A pair of aperture stops is adjacent to the frosted covers. A circuit board has LEDs (Light Emitting Diodes) on both sides of the board is placed between the pair of aperture stops. Each sign is powered by a low voltage power source.
|
