The pin diagram of seven segment display is shown in the above figure. Generally seven segment displays are available in 10 pin package. Later in 1970’s, with the advent of LEDs usage of seven segment displays increased to a large extent. They are used in electric power plants but has gained no much reputation. After that in 1910 seven segment display is invented and is illuminated using incandescent bulbs. Wood invented eight segment displays which displays the digit ‘4’ by using diagonal bar. The seven segment display dates back to century old. Single seven segment or number of segments arranged in an order meets our requirements. These LED’s or LCD are used to display the required numeral or alphabet. Liquid crystal displays (LCD) use the properties of liquid crystal for displaying. LED or light emitting diode is P-N junction diode which emits the energy in the form of light, differing from normal P-N junction diode which emits in the form of heat. The seven segment displays are made up of either LEDs (Light emitting diode) or LCDs (Liquid crystal display). Its wide range of applications is in microwave ovens, calculators, washing machines, radios, digital clocks etc. The binary information can be displayed in the form of decimal using this seven segment display. Use of LEDs in seven segment displays made it more popular.
You can see the Seven Segment Display devices in TV shows counting down to ‘0’.
Seven segment display is the most common device used for displaying digits and alphabet. Driving a Seven Segment Display with Transistorĭriving a Seven Segment Display with Integrated Circuit.