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Digital number may refer to: Numerical digit, the general concept of a digit-based numbering systems; Specific digital number systems such as: binary numeral system; octal; decimal; hexadecimal; Seven-segment display character representation, the "digital" font commonly associated with LED displays on calculators
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.
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.
Digital type became the dominant form of type in the late 1980s and early 1990s. Digital fonts store the image of each character either as a bitmap in a bitmap font, or by mathematical description of lines and curves in an outline font, also called a vector font. Bitmap fonts were more commonly used in the earlier stages of digital type, and ...
One application was in the Sharp EL-8, an early electronic calculator.The eight-segment display produces more rounded digits than a seven-segment display, yielding a more "script-like" output, with the trade-off that fewer possible alphabetic characters can be displayed because the bars F and G are merged (see table below).
A digital font's design space in digital type is called the em, which is a grid with arbitrary resolution. Scaling the em to a particular point size is how imaging systems—whether for screen or print—work. In digital type, the relationship of the height of particular letters to the em is arbitrarily set by the typeface designer.
The LED variant is typically manufactured in single or dual character packages, allowing the system designer to choose the number of characters suiting the application. Often a character generator is used to translate 7-bit ASCII character codes to the 14 bits that indicate which of the 14 segments to turn on or off.
The Unicode standard does not specify or create any font (), a collection of graphical shapes called glyphs, itself.Rather, it defines the abstract characters as a specific number (known as a code point) and also defines the required changes of shape depending on the context the glyph is used in (e.g., combining characters, precomposed characters and letter-diacritic combinations).