These are basically of two types – Resistive and Capacitive.
Resistive touch screens contain two layer of conductive material with a very small gap between them which acts as a resistance. When it is is touched with finger (or stylus) the two layers meet at the point of touch thus making a circuit at the point of touch
These are not as responsive as capacitive touch screens and often require a stylus to identify point of touch accurately. These are used only in lower end smartphones and feature touch phones.
Capacitive Touch screen LCD consists of a layer of glass coated with a transparent conductor. When a human body(finger) touch this capacitive touch screen an interruption is created in the screens electrostatic field (which is measurable as a change in capacitance)and is detected by phone’s processor or chip and which in turn instructs phone’s operating system to trigger and event or action accordingly.
OLED (Organic Light Emitting Diode) is a newer technology for displays of mobiles and monitors. It is a layer of organic material (carbon based) is sandwiched between two conducting sheets (an anode and a cathode), which in turn are sandwiched between a glass top plate (seal) and a glass bottom plate (substrate). When electric pulse is applied the two conducting sheets, electro-luminescent light is produced directly from the organic material sandwiche between. Brightness and color can vary depending on the electric pulse.
AMOLED (Active-Matrix Organic Light-Emitting Diode.) are a type of OLED displays for mobiles and are rapidly gaining popularity in top end smartphone segment.These have all the attributes of an OLED display like brilliant color reproduction, light weight, better battery life, higher brightness and sharpness and light weight designs.
Super AMOLED is an advanced version displays better quality
It is a term used by Apple for its high resolution. It is called the Retina display because its pixels cannot be individually identified by the human eye, thus making the display super sharp and brilliant.
Haptic / Tactile touch screen has been used by Blackberry and Nokia for their touch screen smartphones targeted towards enterprise market. It provides a tactile feedback on a touch action on the screen thus providing an immediate and unmistakable confirmation to the user. This has been found to significantly improve user performance, accuracy and satisfaction while typing on a touch screen.
It is a special glass shield with exceptional damage resistance that helps protect mobile displays from scratches, drops, and bumps of everyday use. This feature is used in companies like Motorola, Samsung and Nokia are now using Gorilla Glass to make their mobile displays more durable and reliable.
Types of Mobile Screen Resolutions and Names
Gone are the day when people had to carry their cameras separately. Now Smartphone have been introduced which gives the picture quality just photos clicked from DSLR camera. Pictures are to keep the memories of your best moment. People buy phone with Front camera and back camera must be of good megapixels and generate a brilliant quality picture or selfie. Flash with a camera will enhance the mobile phone features.