| 摘要 |
A traffic signal display (10) apparatus includes a display surface (12) havi ng a plurality of bicolor bipolar LEDs (16) thereon in an array. When current i s fed into the array in a first direction, the bicolor bipolar LEDs (16) displ ay a first color, which may be green. When current is fed into the array in a second direction, the bicolor bipolar LEDs (16) display a second color, whic h may be yellow or amber. When current is fed into the array alternately in th e first and second directions, the bicolor bipolar LEDs (16) display a third color, which may be red. The display apparatus may be subdivided into multip le independent zones, allowing arrows (20, 22) to be displayed. The single display apparatus (10) can therefore be used to replace the three to five stacked conventional traffic light display units.
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