| 摘要 |
A display device for allowing quick and easy manual modification of the displayed information. A set of display plates each having two sides and a central bore which are parallel to one another are kept releasably biased against a backboard by a corresponding set of resilient strips extending through the plates. Each one of the bores of the plates has a contrasting surface colored with a color contrasting with respect to the backboard. The plates are selectively pulled away from the backboard and pivoted about said bore in either direction to expose their contrasting surfaces in order to form displayed numerals, letters or other symbols. The pivoting action is very fast and the plates cover the same area of the backboard in both their pivoted positions.
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