The document provides a historical overview of television, detailing its evolution from radio to the introduction of electronic television in 1946. It outlines various technologies such as cathode ray tubes (CRT), plasma, liquid crystal displays (LCD), and organic light emitting diodes (OLED), highlighting their advantages and applications. The future of OLED technology is also discussed, including potential uses in various electronic devices and innovations yet to be imagined.

1. Televisions
Made By-Hemant Sarthak

2. The History of Television

3. An Introduction to Television
 By the late 1930s, radio was woven into the fabric of
American life. It allowed millions to enjoy public events in
the comfort of their own home.
 Adding picture was the next logical step.
 By the 1950’s, television had already become the main
medium for shaping public opinion (Diggs-Brown, B.
2011).

4. The Birth of Television
Although the electronic television was demonstrated to the
public by Philo Farnsworth in 1928, “technical difficulties,
corporate competition, and World War II postponed its
widespread introduction to the public until 1946”.

5. Evolution of Television Technology
Cathode Ray Tubes
Plasma, LCD and
LED
OLED the future ….

6. What is cathode ray tube?
 The cathode ray tube (CRT) is a vacuum tube containing
an electron gun (a source of electrons) and a fluorescent screen,
with internal or external means to accelerate and deflect the
electron beam, used to create images in the form of light emitted
from the fluorescent screen. The image may represent
electrical waveforms (oscilloscope), pictures (television, computer
monitor), radar targets and others.

7. Basic Cathode Ray Tube
The CRT uses an evacuated glass envelope which is
large, deep, heavy, and relatively fragile.

8. Plasma, Liquid Crystal Display(LCD), Light
Emitting Diode(LED)
 Physical Size
 Compact and Lightweight
 Space saving
 Can be mounted on a wall or panel

9. Advantages compared to CRTs

10. O.L.E.D
(Organic Light
Emitting Diode)
The present and future

11. What is an OLED ?
OLED - Organic Light Emitting
Diode
An OLED is a light emitting
diode (LED) which emissive
electroluminescent layer is
composed of a film of organic
compounds.

12. HISTORY
• First developed in the early 1950s in France.
• 1960s-AC-driven electroluminescent cells using doped
anthracene was developed.
• In 1987 Chin Tang and Van Slyke introduced the first
light emitting diodes from thin organic layers.
• In1990 electroluminescence in polymers was
discovered.

13. APPLICATION OF OLED
• Televisions
• SONY
• LG transparent TV
• Cell Phone screens
• Wrist Watch
• Computer Screens
• Laptops
• Desktops
• Bendable Devices
• Portable Device displays
• Philips Go Gear MP3 Player

14. ADVANTAGES
• Faster response time than LCDs
• Consume significantly less energy
• Can be transparent when off
• Flexible and Conformal Displays
• Thinner display-No backlight required
• Better contrast ratio
• Safer for the environment
• Wider viewing angles; up to 170 degrees
• OLEDs refresh almost 1,000 times faster
then LCDs
• Low cost materials and fabrication method
• Less Expensive than LCD due to lesser
components
• Can be made using plastic screens; LCDs
require glass backing

15. FUTURE USES FOR
OLED
 Data glass
 GPS system
 OLED – in future cars
 Curved OLED displays, placed on non-flat surfaces
 And many more we cannot even imagine today
Scroll Laptop
• Nokia concept OLED Laptop

16. Thank You
PRESENTED BY-HEMANT SARTHAK