Segment display/Three-segment display/Lifts

Lift

Elevator consoleLifts or elevators often indicate, both inside and next to doors, the direction they are moving and the floor they are currently at.Up ab and down bc arrows"}" data-file="3-segment_arrows_labeled.svg" style="margin: 0px 0px 1.125rem; padding: 0px; box-sizing: inherit; text-align: center;">Up  ab and down  bc arrows

Since they usually can only go up  and down, a 3-segment display may be used for arrows.

full arrows

^ | ↑ v ◊ ↓ ↕

Different cultures, countries and languages have different ways to designate floors. Probably the most universal approach is to assign the ground level zero   and count up from there, or down for underground floors. This requires an optional minus sign  in front of the digit   and additional digits are necessary    for skyscrapers; these can be combined with each other since there tend to be only few sub-levels   . A plus sign is redundant and is not possible with standard 7-segment displays.

If first letters are used instead, problems may arise. K is efhi with this arrangement of 9 segments"}" data-file="9-segment_´`_labeled.svg" style="margin: 0px 0px 1.125rem; padding: 0px; box-sizing: inherit; text-align: center;">K is efhi with this arrangement of 9 segments

In German, the ground floor is called Erdgeschoss, and Untergeschoss  may be used for basements (possibly followed by a digit   when it substitutes a minus sign), but Keller is preferred especially for single ones. Therefore, a German Aufzug ‘lift’ is not unlikely to employ a 9-segment display capable of displaying the letter K, if it does not use dot matrix displays of course. When there are only three floors – lower, main and upper  Obergeschoss – there may be no digits at all :,,– G representing Geschoss‘floor’, although the French loan  Etage is common elsewhere.