| 摘要 |
An improved multi-segment, electronically-actuated display array that displays (a) a multiplication symbol configured approximately like "x", and, centered in the same location, (b) one or more of an addition symbol, a subtraction symbol, and a division symbol configured approximately like "+", "-", and "/", respectively. A novel central segment or central segment group of the array displays a central portion of the multiplication symbol and of the other displayable arithmetic operation symbols-essentially the entire intersection of (a) the multiplication symbol and (b) a horizontal bar constituting the entire subtraction symbol, the horizontal portion of the addition symbol, and/or the vertically-centered portion of the division symbol. A novel feature of the central segment or central segment group is that its maximum horizontal dimension significantly exceeds the height of the just-mentioned horizontal bar and the thickness of the arms of any displayable addition symbol.
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