The document discusses the evolution and technology of computer monitors, highlighting their role as essential output devices. It covers the history from early cathode ray tube (CRT) monitors to modern liquid crystal displays (LCD) and organic light-emitting diode (OLED) monitors, emphasizing improvements in size, clarity, and energy efficiency. Additionally, it notes the decreasing use of the term 'visual display units' and presents other types of monitors briefly.

1. MONITORS
PRESENTED BY –
CHETAN MALVIYA

2. INTRODUCTION
 A computer monitor is an output
device that displays information in
pictorial form.
 A monitor usually comprises the
display device, circuitry, casing,
and power supply.
 Monitors are very important
because without them you wouldn't
be able to view your output.

3. HISTORY
 Originally, Monitors were used for data processing while
Television sets were used for entertainment .
 As technology developed engineers realized that the output of a
CRT display was more flexible than a panel of light bulbs and
eventually, by giving control of what was displayed in the
program itself, the monitor itself became a powerful output
device in its own right.
 Computer monitors were formerly known as visual display units
(VDU), but this term had mostly fallen out of use by the 1990s.

4. TECHNOLOGY
Cathode Ray Tube monitors
 The first computer monitors used were cathode
ray tubes (CRTs) and these monitors employed
the use of CRT technology.
 The display was monochrome and far less
sharp and detailed than on a modern flat-panel
monitor.
 This necessitated the use of relatively large text
and severely limiting the amount of information
that could be displayed at one time.
 Later on , high-resolution CRT displays were
developed for the specialized military, industrial
and scientific applications.

5. TECHNOLOGY
Liquid crystal display
 The LCD monitor makes use of one of the
most advanced tech available today by using
CCFL(cold cathode fluorescent) for back
lighting.
 The advantages of LCDs include their
compact size which makes them lightweight.
 The images transmitted by LCDs do not get
geometrically distorted and they do not
consume much electricity and can be run off
of batteries.
 They also have a larger viewing area , with
a typical widescreen monitor having a 16:9
aspect ratio ,compared to 4:3 aspect ratio of
a typical standard width monitor.

6. TECHNOLOGY
Organic LED (light-emitting diode) monitors
 OLEDs are flat panel , or slightly curved displays which make use of light-
emitting diodes for back lighting instead of CCFL used in LCDs for back-lighting.
 Organic light-emitting diode (OLED) monitors provide higher contrast and better
viewing angles than LCDs . It has a very short depth and is light in terms of its
weight.
 They are often less expensive , more reliable , longer lifespan and less
environmental impact.

7. ADVANCEMENT
Some other types of Monitors:-

8. THANK YOU