COMPUTER SCIENCE AND ENGINEERING
COMPUTER GRAPHICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Control grid
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Focusing system
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Deflection system
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Phosphorous
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Detailed explanation-1: -Electron Tubes The beam intensity varies as a function of the beam-control element in the electron gun. In a TV or computer-display CRT, the electrical signal that controls the beam intensity corresponds to the desired picture information and is referred to as the video signal.
Detailed explanation-2: -The deflection coils are used to deflect or tilt the electron beam off-axis.
Detailed explanation-3: -With a voltage connected to the plates, the electrons experience a vertical force. The constant vertical force causes the beam to follow a parabolic path. This will be increasingly curved as the deflecting voltage is increased.
Detailed explanation-4: -The horizontal deflection of the electron beam across the wider screens of larger TVs requires a high voltage (20-kV) at a frequency of 100 kHz [55].