Detail study about the Video Graphics Array
VGA full form is Video Graphics Array, it is an analog display standard used in computer monitors, projectors and some televisions. The VGA was the most successful display standard for two decades because of its high luminance, affordability, and good colour reproduction on displays. The VGA was the first display based digital-to-analog converter that made it a true colour device. It became the standard digital display format that replaced the previous analog CRT monitors. The VGA has a maximum resolution of 640 x 480 pixels with 16 colours at a maximum refresh rate of 60 Hz.
How does it work?
In the video monitor, an analog VGA signal is created by mixing a sine wave with the white brightness of the screen. The Video Graphics Array signal is converted to an analog voltage which will be scanned across a series of phosphors on the CRT. The phosphors absorb light at different wavelengths which reflect light waves at different rates and create an image on a phosphor screen. Phosphor screens have two states: Brightness and Red. The relationship between red, green and blue dots on the screen is commonly known as RGB (Red, Green and Blue). The brightness levels between Red, Green and Blue dots are fixed in 480 units for each dot.
Final Verdict:
This paper has been written in an attempt to explain the beauty of the graphic system in a very funny way, this is just one of many fun and interesting books on the subject. In the final analysis, I feel that the VGA format has been over hyped. The fact that all VGA monitors are no longer made makes me think that perhaps there is more to this than meets the eye. After all, you can’t go wrong with a Video Graphics Array monitor for your computer workstation.