| 摘要 |
AN ADVERTISING BOARD CAN BE DISPLAYED ADVERTISING DURING BOTH DAYTIME AND NIGHTTIME. THE BOARD HAS A BLOCKING PANEL (4) HAVING PRINTED ADVERTISING MATERIAL ON ONE FACE LAYERED ON THE FRONT OF PCB BASE PLATES (6) INSTALLED WITH COMBINATION OF LED DEVICES. DURING NIGHTTIME, THE ADVERTISING BOARD DISPLAYS VARIOUS MOVING ADVERTISING PICTURES THROUGH THE SEVERAL LED DEVICES WHICH ARE ALIGNED WITH HOLES IN THE BLOCKING PANEL (4). DURING DAYTIME, THE ADVERTISING BOARD HAS A PRINTED ADVERTISING SHEET.
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