2.6- What Is Raster Scan Display In Computer Graphics Hindi | Raster Scan System computer Graphics
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What Is Raster Scan Display In Computer Graphics Hindi | Raster Scan System computer Graphics
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   • 2.6- What Is Raster Scan Display In C...  

Raster Scan Display in this technique the electron beam is swept across the screen one row at a time from top to bottom. As it moves across each row, the beam intensity is turned on and off to create a pattern of illuminated spots. This scanning process is called refreshing. Each complete scanning of a screen is normally called a frame.

Raster scan is the most common method of displaying images on the CRT screen. In this method, the horizontal and vertical deflection signals are generated to move the beam all over the screen in a pattern shown in the Fig. Here, the beam is swept back and forth from the left to the right across the screen. when the beam is moved from the left to the right, it is ON. The beam is OFF, when it is moved from the right to the left as shown by dotted line in Fig. The refreshing rate, called the frame rate, is normally 60 to 80 frames per second.

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