Display Components


Liquid Crystal Displays is used in displays for electronic devices such as LCD monitor, car dashboard display, watches, calculators and televisions.


The advantages of liquid crystal display include the following.

  • LCD’s consumes less amount of power.

  • LCD’s are consist of some microwatts for display in comparison to some mill watts for LED’s

  • LCDs are of low cost.

  • Provides excellent contrast

  • LCD’s are thinner and lighter.


The disadvantages of liquid crystal display include the following.

  • Require additional light sources

  • Range of temperature is limited for operation

  • Low reliability

  • Speed is very low


The applications of liquid crystal display include the following.

Liquid crystal technology has major applications in the field of science and engineering as well on electronic devices.

  • Liquid crystal thermometer

  • Optical imaging

  • Used in the medical applications.

7 Segment Display

A seven-segment display is a form of electronic display device for displaying decimal numerals. Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information.

A 7-segment display can be either a Common Cathode (CC) or a Common Anode (CA) type display.

In the common cathode display, all the cathode (K) connections of the LED segments are tied together and connected to ground or zero-volts.

 In the common anode display, all the anode (A) connections of the LED segments are joined together to a positive voltage supply.