A sixteen-segment display, sometimes called a "Union Jack" display or a "British Flag" display, is a type of display based on 16 segments that can be turned on or off according to the graphic pattern to be produced. It is an extension of the more common
seven-segment display, adding four diagonaland two vertical segments and splitting the three horizontalsegments in half (A fourteen-segment displaysplits only the middle one).
Before the advent of inexpensive
dot-matrixdisplays, sixteen and fourteen-segment displays were some of the few options available for producing alphanumericcharacters on calculatorsand other embedded systems. However, they are still sometimes used on VCRs, car stereos, microwave ovens, telephone Caller IDdisplays, and slot machinereadouts.
Sixteen-segment displays may be based on one of several technologies, the three most common
optoelectronicstypes being LED, LCD and VFD. The LED variant is typically manufactured in single or dual character packages, to be combined as needed into text line displays of a suitable length for the application in question.
As with seven and fourteen-segment displays, a
decimal pointand/or comma may be present as an additional segment, or pair of segments; the comma (used for triple-digit groupings or as a decimal separator in many regions) is commonly formed by combining the decimal point with a closely 'attached' leftwards-descending arc-shaped segment. This way, a point or comma may be displayed between character positions instead of occupying a whole position by itself, which would be the case if employing the bottom middle vertical segment as a point and the bottom left diagonal segment as a comma. Such displays were very common on pinball machines for displaying the score and other information, before the widespread use of dot-matrix display panels.
Dot matrix display
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