LED seven segment displays are of two types, common cathode and common anode.
When power is given to a particular segment, it glows and the desired digit can be displayed by powering the suitable combination of LEDs. In an LED 7 segment display, as the name indicates the 7 segments plus the dot segment are based on LEDs. Here in this article we give stress to the LED seven segment display. The segments may be based on incandescent bulbs, fluorescent lamps, LCD or LED. The slight inclination to the right is given to improve the readability.Some seven segment displays have an additional dot element which can be used for indicating decimal points. The seven elements (segments) are arranged in the form of a square shaped “8” which is slightly inclined to the right.
Numbers from 0 to 9 can be displayed using various combinations of the segments and in addition to this the hexadecimal letters A to F can be also displayed using a seven segment display. Seven segment display have seven segments which can be individually controlled (ON/OFF) to display the desired number. The idea of seven segment display is very old and they are in the scenario from early nineteenth century.
Seven segment display is a device that can display decimal numbers and are widely used in electronic clocks, electronic meters, digital display panels and a hand full of applications where numerical data is is displayed.
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