This document discusses the history and features of different types of display screens. It describes cathode ray tubes from 1897, LCD screens that were developed in 1963, plasma monitors from 1964, touch screens introduced in 1965 but became popular after 2007, and OLED screens which were introduced in 1987 but brought to consumers in 2009 and have advantages over LCD and plasma screens.

1. DISPLAY DEVICES
Output Screens

2. CRT Cathode Ray Tube

3. cathode ray tube (CRT) A cathode ray tube (CRT) is a
specialized vacuum tube in which images are produced
when an electron
1897

4. LCD Liquid Crystal display
 LCD (liquid crystal display) is the technology
used for displays in notebook and other smaller
computers.
1963

5. Plasma Monitors
 A plasma display is a computer video display in
which each pixel on the screen is illuminated by a tiny
bit of plasma or charged gas, somewhat like a tiny
neon light.Plasma displays are thinner than cathode
ray tube ( CRT ) displays and brighter than liquid
crystal displays ( LCD ).
1964

6. Touch Screen Monitors
 A user can give input or control the information processing
system through simple or multi-touch gestures by touching
the screen with a special stylus or one or more fingers.
1965
 Popular after Apple release of touch iphone in 2007

7. OLED Organic Light Emitting Display
 1987
 Introduced to consumers in 2009
 An OLED display uses a new
technology called OLED (Organic
Light Emitting Diodes). OLED
screens are brighter, more efficient,
thinner and feature better refresh
rates and contrast than LCD or
Plasma. OLEDs are made by
placing thin films of organic (carbon
based) materials between two
conductors.