Explain the raster scan monitors, Computer Engineering

Assignment Help:

Explain the raster scan monitors

The refresh process must also be performed for raster scan monitors. Most television monitors are raster scan display devices : one scan-line at a time. Raster scan systems uses a memory buffer called frame buffer (or refresh buffer) in which the intensities of the pixels are stored. Refreshing the screen is performed using the information (intensity of each pixel) stored in the frame buffer. Frame buffer can be treated as a two-dimensional array. Raster display devices read the frame buffer and activate the three phosphor dots in the triad according to the value read from the frame buffer.

The entire contents of the frame buffer should be read and the pixels should be activated appropriately at a sufficiently high rate to avoid flickering of the picture. Depending on the persistence of the phosphor coated inside the screen, the monitors require different refresh rates. In some raster display devices, a frame buffer is displayed in two passes. This kind of refreshing is called interlaced. In the first pass the odd rows are refreshed, while the even rows are refreshed in the second pass. Thus, the screen is refreshed in half the time. Though this approach does not really increase the rate of refreshing the screen, but is quite effective in reducing the flicker.

 


Related Discussions:- Explain the raster scan monitors

Induction that your closed formula , Show by induction that your closed for...

Show by induction that your closed formula from (c) is the number of times that the given statement is implemented for a problem of size n.Note: if your proof is easily  a proof th

.image forgery detection, what is the code to detect image forgery using Ma...

what is the code to detect image forgery using Matlab..??

What are the different types of parameters, What are the different types of...

What are the different types of parameters? Formal Parameters: Parameters, which are described during the definition of subroutine with the FORM statement.

Importance of spectrum to the mobile sector, (a) The statement "Standards ...

(a) The statement "Standards create markets or markets create standards" has been the subject of considerable debate. Discuss the advantages and disadvantages to having multiple

Micrography technology, Micrography: Micrographic technology is an out...

Micrography: Micrographic technology is an outgrowth of photographic technology. Since this technology is being increasingly used to supplement computer systems, strong electr

Domains of artificial intelligence, The major domains of AI research and...

The major domains of AI research and development. AI applications can be grouped under three major areas cognitive science robotics and natural interfaces though these class

Why does microprocessor contain rom chips?, Microprocessor have ROM chip be...

Microprocessor have ROM chip because it have instructions to implement data. It have the monitor program which not only include implementation instruction but also interfacing

What are the characteristics of digital ics, What are the characteristics o...

What are the characteristics of digital ICs used to compute their performance? Ans: Characteristics of Digital Integrated Circuits 1. Speed of operation:   The Speed o

Functions for various communication modes, Q. Functions for various communi...

Q. Functions for various communication modes? MPI offers both non-blocking and blocking send/transmitting and receive operations for all modes. Functions for various commun

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd