Editing Display device (section)

==== Segment displays ====
[[Image:Digital clock changing numbers.jpg|thumb|right|300px|Digital clocks display changing numerals]]
[[File:Common segment displays.svg|right|thumb|The common segment displays shown side by side: [[Seven-segment display|7-segment]], [[Nine-segment display|9-segment]], [[Fourteen-segment display|14-segment]] and [[Sixteen-segment display|16-segment]] displays]]
Some displays can show only [[numerical digit|digits]] or [[alphanumeric]] characters. They are called '''segment displays''', because they are composed of several segments that switch on and off to give appearance of desired [[glyph]]. The segments are usually single [[LED]]s or [[LCD|liquid crystals]]. They are mostly used in [[digital watch]]es and [[pocket calculator]]s. Common types are [[seven-segment display]]s which are used for numerals only, and alphanumeric [[Fourteen-segment display|fourteen-segment displays]] and [[sixteen-segment display]]s which can display numerals and Roman alphabet letters.