an intro to television
DESCRIPTION
This is Presented By Vishnu, Who s member of KanchiLUG... It is created by Open Office ImpressTRANSCRIPT
INTRODUCTION TO TELEVISION
- K. Vishnu MCA KanchiLUG Member
Television history was not
overnight and not invented by a
single inventor.
MECHANICAL TELEVISION
- John Logie Baird (1920)
The idea of using arrays of
transparent rods to transmit
images for television.
- Charles Francis Jenkins (1923)
Radiovision claimed to have
transmitted the earliest moving
silhouette images.
ELECTRONIC TELEVISION CRT
Electronic television is based on the
development of the cathode ray tube.
Now it is the picture tube
found in modern TV sets.
MAIN INVENTORS OF CRT TELEVISION
Vladimir Kosma Zworykin (1925)
Philo T. Farnsworth (1939)
1. Glass Tube
2. Electron Gun
3. Electron Beam
4. Upper & Lower Leds
5. Shadow Mask
6. Phosporous Coated Screen
LCD TELEVISION
* An LCD TV is a flat panel TV
* It based on liquid crystal display
* Inter active properties
# liquid crystals # light
* The liquid crystals are broken down into small particles.
* These smaller particles are known as pixels.
* Crystals are located in the middle of two electrodes.