A Brief History of the Crazy Old 7-Segment Display
6 hours ago
- #technology-history
- #electronics
- #display-design
- The concept of seven-segment displays dates back to the early 1900s, with patents filed around 1908-1910, predating the 1970s by decades.
- Early implementations used incandescent lamps or neon tubes in the 1930s-1940s, before LEDs became practical in the late 1960s.
- Seven segments became standard for balancing readability with minimal hardware, though variations like 14- or 16-segment 'Union Jack' displays emerged for better alphanumeric support.
- The design principle involves starting with the most complex digit (like an 8) and selectively removing segments to form others, a concept seen even in manual price tags.
- Seven-segment displays persist due to their simplicity and adaptability across technologies, from LEDs and LCDs to older mechanical systems.