What is Pixel?

What is Pixel?
Pixels or image elements specify the quantity of dots on the screen. Pixels are composed of red, green and blue phosphor dots. The more dots, the clearer the image on the screen.

What is Dot Pitch or DPI (Dot Per Inch)?
Dot pitch (DPI) indicates the distance between phosphor dots of the same color (red, green, or blue). These distances are usually 25-39 mm. is in the range. A small DPI value indicates that there are more pixels on the screen, which means that the image is of higher quality.


How should the resolution settings be in Windows 95/98?
Desktop resolution is a measure of the number of dots on the screen in Windows. Higher resolution means more visible information, but in this case the information may be harder to see because the image information will be smaller.


Windows resolutions are specified as horizontal x vertical (ex: 640×480) and the number of dots in vertical is 3/4 of that in landscape. Generally, 640×480, 800×600, 1024×768, 1280×1040 resolutions are used in Windows. In order to adjust the resolution in Windows, it is necessary to enter the control panel, display and settings sections, respectively.

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How many MB should be the RAM of the video card according to the resolution and color settings?
The amount of video RAM required can be formulated as:

horizontal resolution x vertical resolution x bytes required for 1 pixel = minimum amount of ram (bytes) required on the video card


How should the refresh settings be in Windows 95/98?
Slow refresh rates will cause the image on the monitor to flicker. The refresh rate is on average 70 Hz. Some video card manufacturers provide software that automatically adjusts the refresh rate with their products.

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256, what is the difference between high and true color?
The number of colors that can be displayed on the monitor is related to the memory (RAM) of the video card rather than the monitor. The terms high and true color 256 indicate the number of bits used to store color information. It requires more bits, more colors and video ram. 256 colors use 8 bits, so when 256 colors are selected, only 256 different colors can be seen on the screen.


High color uses 16 bits, so when high color is selected, 65536 (64k) different colors can be seen on the screen. True color uses 24-bit, so when true color is selected, 16 million different colors can be seen on the screen.

The difference between 16 and 24 bits is difficult to perceive by the human eye. The difference between 8 and 16 bits is striking.

CD-ROM Drives

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CD (compact disc) offers 650 MB of data and up to 74 minutes of audio or video storage. 12 cm diameter by 1.2 mm thick CDs actually have a very simple structure. The writable structure of the CD consists of three thin layers, the drying layer at the top, the aluminum layer in the middle and the transparent layer at the bottom. The part where the data is written is the middle layer.