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The following phrases come from a portable media player's seven-segment display. They give a good illustration of an application where a seven-segment display may be sufficient for displaying letters, since the relevant messages are neither critical nor in any significant risk of being misunderstood, much due to the limited number and rigid domain specificity of the messages.
A typical 7-segment LED display component, with decimal point in a wide DIP-10 package. A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.
Segment display/Seven-segment display/T; Usage on eo.wikipedia.org Sep-segmenta montrilo; Usage on es.wikipedia.org Visualizador de siete segmentos; Usage on fr.wikipedia.org 7 (chiffre) Usage on ja.wikipedia.org 7セグメントディスプレイ; Usage on ko.wikipedia.org 7세그먼트 표시 장치; Usage on nl.wikipedia.org Waarheidstabel
It is an expansion of the more common seven-segment display, having an additional four diagonal and two vertical segments with the middle horizontal segment broken in half. A seven-segment display suffices for numerals and certain letters, but unambiguously rendering the ISO basic Latin alphabet requires more detail. [ 3 ]
The idea is to use a display font where a single burned out or missing segment in a digit will not display as a different valid digit." So, we don't want to have 9 display with segment D, because then a dead segment E would fail to distinguish 8 and 9. Makes sense. Except that now a dead segment A will fail to distinguish 4 and 9.
A vane display is an electro-mechanical type of 7-segment display. Unlike LED and VFD segmented displays, vane displays are composed of seven physical surfaces, typically painted white, but occasionally other colors, such as yellow or fluorescent green. If a segment is to be displayed as "off", it will be rotated so that its edge faces forward ...
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