Vacuum fluorescent display

From WikiMD.com Medical Encyclopedia

Vacuum Fluorescent Display[edit | edit source]

A vacuum fluorescent display (VFD) is a type of display device used commonly in consumer electronics, such as video cassette recorders, car radios, and microwave ovens. Unlike liquid crystal displays, a VFD emits a very bright light with high contrast and can support a wide range of colors.

A typical vacuum fluorescent display

History[edit | edit source]

The VFD was invented in 1959 by Noritake Itron Corporation, a Japanese company. The first commercial VFD was introduced in 1967 and was used in the Sharp EL-8, one of the first electronic calculators.

Display of the Sharp EL-8 calculator

Construction and Operation[edit | edit source]

A VFD consists of a cathode filament, anodes, and grids encased in a vacuum-sealed glass envelope. The cathode is heated to emit electrons, which are accelerated towards the anodes by the grid. The anodes are coated with phosphor, which emits light when struck by electrons.

Close-up of a VFD showing the filament and grid structure

Applications[edit | edit source]

VFDs are used in a variety of applications due to their brightness and ability to display multiple colors. They are commonly found in automobile dashboards, consumer electronics, and industrial equipment.

VFD used in a car dashboard

Advantages and Disadvantages[edit | edit source]

Advantages[edit | edit source]

  • High brightness and contrast
  • Wide viewing angle
  • Fast response time
  • Ability to display multiple colors

Disadvantages[edit | edit source]

  • Higher power consumption compared to LCDs
  • More expensive to manufacture

Related Pages[edit | edit source]

References[edit | edit source]

  • "Vacuum Fluorescent Display." Noritake Itron Corporation. Accessed October 2023.
  • "History of VFDs." Sharp Corporation. Accessed October 2023.

  • Vacuum fluorescent display

  • Vacuum fluorescent display

  • Vacuum fluorescent display

  • Vacuum fluorescent display

  • Sharp EL-8 Display 8 Digits Green Itron Fluorescent Tubes

  • Индикатор ИВ-4

  • Vacuum fluorescent digit

  • Vacuum fluorescent display in car

  • Casio M-1 Calculator

WikiMD
Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Search WikiMD

Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.

Retrieved from "https://wikimd.com/w/index.php?title=Vacuum_fluorescent_display&oldid=6326772"

Contributors: Prab R. Tumpati, MD