Why Displays are Different? Display Technology Explained!

     Now-a-day, different type of displays can be found everywhere. Also, you might heard about different display types. Different display technology developed for different segments, such as monitors, televisions, smartphones and different machines. If we look back to old televisions and computer monitor then we can see that they occupied large area but recent TVs and monitors can be fit in a wall. In a TV or monitor, the large component is the display and it got huge enhancements in terms of technology and size over times. Not only in TVs and monitors but also in the smartphones display, gets huge technological enhancements over times to provide superior colors, brightness and viewing angles. In this article, we have discussed about how we have came to today's displays which are more attractive to view and compact in sizes than the old generation CRT displays.

Displays in recent times both in smartphones and televisions have different types as they are developed over times by adopting new technologies. These different displays are as follows -

• Segment Display
• CRT Display
• LCD
• TFT LCD
• IPS LCD
• LED Display
• OLED Display
• AMOLED Display
• sAMOLED Display
• QLED Display
• PDP 

Segment Display - 

This is a type of display which we can see in digital clocks, calculators and display boards of machines. It can only show digits or alphanumeric characters. This kind of displays are divided into segments. These different segments switch on and off to give appearance of desired glyph. These segments are usually made of liquid crystals or LEDs.

There are several types of segment display and they are -

• Seven Segment Display
• Fourteen Segment Display
• Sixteen Segment Display etc.

CRT Display - 

CRT stands for Cathode Ray Tube. This type of displays can be found in old generation televisions and monitors. It was available both the black and white and colored output. In this display technology, CRT is used to display images and the CRT is a vacuum tube that contains one or more electron guns and a phosphorescent screen.

LCD - 

LCD stands for Liquid Crystal Display. These liquid crystals are arrayed in front of the light source to produce a color image. It is a flat crystal display consists of polarizers, liquid crystals and light modulating properties. These LCDs received technological enhancements over times. Thus, available in different form of variation and they are - 

TFT LCD - 

TFT stands for Thin-Film Transistors. So, this display is called Thin-Film Transistor Liquid Crystal Display. It is basically uses Thin-Film Transistor technology. It helps the normal LCDs to improve the quality of the images in terms of colors, contrast etc. These TFT LCDs are basically used in low end smartphones. This displays has the narrow viewing angles and poor visibility in direct sunlight.

IPS LCD - 

IPS stands for In-Plane Switching. So, this display is called In-Plane Switching Liquid Crystal Display. IPS LCDs are better than TFT LCDs in almost every aspects. These displays provides a better color reproduction and extra viewing angles than TFT LCDs. These IPS LCDs are very popular in recent times. Almost every midrange smartphones, computer monitors and low end televisions uses these IPS LCDs.

Apple introduced their high resolution IPS LCDs with more vibrant color reproduction ability, brightness and contrast, named it the Retina Display.

LED Display - 

LED stands for Light Emitting Diode. This type of display uses an array of LEDs on a flat panel. This is a very popular display now a day. Almost every TVs and monitors comes with these displays. It has more brightness than LCDs and can be visible even in sunlight.

OLED Display - 

OLED stands for Organic Light Emitting Diode. OLED display was developed over LED display technology. OLED display panels doesn't use polarization technology. Instead of this, it uses pixels consists of  subpixels of red, green and blue, which lights itself when gets voltage. This OLED display technology is the next generation display technology over LCD and regular LED display. OLED panels are more costlier than LCDs and LED displays. An OLED display drops the backlight as it can lights up each pixels individually which are tiny LED components. It can displays deep black levels and in low light conditions, it can achieve a higher contrast ration than any other LCDs, even LED displays too. These OLED displays mostly used in high end televisions, monitors and smartphones. It can be made flexible. Thus, in the latest foldable displays and curved displays used OLED panels. It is also capable to house an in-display optical fingerprint scanner as it can be made as transparent display.

AMOLED Display - 

AMOLED stands for Active Matrix Organic Light Emitting Diode. Samsung is the leading AMOLED display manufacturer in the world. This was developed over OLED technology. It doesn't uses any liquid mechanism. An array of tiny LEDs on TFT modules used in AMOLED panels. The mechanism behind this is quiet same as the technology used in OLED displays. Every individual LED switch on and off as per requirement to form or display a picture. It is called Active Matrix System. Like OLEDs, AMOLED displays also can produced more vibrant colors, brightness, sunlight visibility and carries other OLED panel features. AMOLED displays are basically used in smartphones and smart watches.

sAMOLED Display - 

sAMOLED stands for Super Active Matrix Organic Light Emitting Diode or Super AMOLED displays. It is developed over AMOLED displays to feature more viewing abilities in terms of viewing angles, color reproductions, brightness, sunlight readability etc. These displays are basically used in smartphones.

QLED Display - 

QLED stands for Quantun Dot Light Emitting Diode. This is a new display technology which uses a metallic quantum dot filter to enhance colors and contrast. This dot filter is basically crystal semiconductor particles film which replaces the RGB filter. These QLED displays can produces pure white colors as well as deepest black color and highest level of brightness. QLED display panels still using backlight which is not used in OLEDs. QLED displays are now can be seen in high end smart TVs and monitors.

PDP - 

PDP stands for Plasma Display Panels. It was popular because it replaced the CRT displays. These plasma displays offers better viewing angles and thinner set than CRT displays. It can also display more brighter colors and deeper black than CRTs and LCDs. It looses its popularity because of OLED panels. It is now used in large displays which can be found in markets to show advertisement, backside of a stage to show its theme etc.