Today the technology and smart devices we use have certainly become of immense importance to us. One of the most crucial elements of these devices and how we interact with them is the display of the device we are using, whether its our Smart-phone, tablet, laptop, or desktop. In earlier days vacuum tube displays dominated the market. Today, most of the market uses LCD displays. A very few high-end products use the OLED display technology. In the following section we will focus on the merits and demerits of the two dominant display technologies namely LCD and OLED.