Скачать или смотреть VGA - Display Connectors Explained | Diazonic Labs

VGA - Connectors Explained | Diazonic Labs

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When it comes to being an IT professional, you have to be prepared to work on different types of systems. One of the biggest issues is having the correct video display connector. With more than ten different types of connectors it can be difficult to identify the correct one. The connections look and act differently from each other.

VGA, Video Graphics Array is a standard type of connection for video devices such as monitors and projectors. This is also called as D-SUB interface. This graphics interface standard for video display controller was first introduced with the IBM PS/2 line of computers in 1987.

VGA cables have 15-pin connectors: 5 pins at the top, 5 in the middle, and the other 5 at the very bottom.

Each pin has its own function. For example, the first pin is for transferring the color red, while the second and third are for green and blue, respectively. Red, green and blue are the primary colors in the color palette and any bit of video signal transferred will be a combination of red, green and blue.

Disadvantages:
-analog signal, so signal loss is expected. That means, the quality signal generated by the monitor board or the graphics card is not exactly replicated on the output screen, the quality will be at least slightly degraded
Bulky connectors
-Higher resolutions not supported
Aspect ratio being 4:3, we could see black bars on the sides or the image may be stretched

Hence, use this monitor only when you not have an option to use any other interfaces


VGA was introduced with a 640 x 480 resolution color display screens with a refresh rate of 60 Hz and 16 colors displayed at a time. If the resolution is lowered to 320 x 200, 256 colors are shown.
This is still the mode PCs boot into, and it is also used in Safe Mode with the display driver disabled (in case the driver is the problem).

In a short time, non-IBM vendors boosted resolution and colors, calling them "Super VGA" (see SVGA). IBM later introduced XGA (1024x768), and over the years, more resolutions were added that were fractions or multiples of the total number of pixels in VGA and XGA resolutions.

The maximum resolution achieved with this interface is 2048x1536 at 85Hz.(which is pretty good, even by today’s standards). Comparatively, the popularly known Full HD resolution of today is 1920x1080.

The aspect ratios of most common display resolutions supported by VGA family connections is 4:3, but most common monitors today have a aspect ratio corresponding to 16:9

#vga #diazoniclabs #displayconnectors

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