The computer display standard is a combination of aspect ratio, display size, screen resolution, color depth, and refresh rate. They are associated with expansion cards, video connectors and certain monitors.
Video Computer display standard
Histori
Various standards of computer display or display mode have been used in the history of personal computers. They are often a combination of aspect ratio (determined as a wide-to-high ratio), screen resolution (specified as width and height in pixels), color depth (measured in bits per pixel), and refresh rate (expressed in hertz). Related to screen resolution and refresh rate is the display adapter. The previous display adapter is a simple frame buffer, but then the display standard also sets the wider display function and software-controlled interface.
Beyond display mode, VESA industry organizations have established several standards related to power management and device identification, while the ergonomic standards are set by TCO.
Maps Computer display standard
Standard
A number of common resolutions have been used with computers derived from genuine IBM PCs. Some of these are now supported by other families of personal computers. This is a de facto standard, usually derived from one manufacturer and reverse engineered by another, although the VESA group has coordinated the efforts of some of the leading video display adapter manufacturers. The standard video associated with the IBM-PC-down personal computer is shown in the diagram and table below, along with those on the original Macintosh and others for comparison. (From the early 1990s onwards, most manufacturers moved to standard PC screens thanks to widely available and affordable hardware).
Preferred display resolution
Although the standard prefixes of super and ultra do not show any special modifiers to base standard resolutions, others do:
- Quarter (Q or q)
- One quarter of the base resolution. For example. QVGA, a term for 320x240 resolution, half width and height VGA, then total quarter resolution. Prefix "Q" usually shows "Quad" (4 times more, not 1/4 times more) in higher resolution, and sometimes "q" is used instead of "Q" to specify quarter (by analogy with the SI prefix M/M), but this use is inconsistent.
- Width (W)
- Basic resolution increases by increasing width and maintaining altitude constant, for square or square pixels on widescreen display, usually with 16: 9 aspect ratio (adding 1/3 extra vs. Standard 4: 3 screen) or 16:10 (adding an extra 1/5). However, it is sometimes used to denote resolutions that will have the same total pixels as this, but in different aspects and share either horizontal OR vertical resolution - usually for narrower but higher 16:10 resolutions than Options 16: 9 , and therefore larger in both dimensions than the basic standard (for example, comparing 1366x768 and 1280x800, both are generally labeled "WXGA", vs base 1024x768 "XGA").
- Quad (ruple) (Q)
- Four times more pixels than the base resolution, which is twice the horizontal and vertical resolution.
- Hex (adecatuple) (H)
- Sixteen times more pixels than the base resolution, which is four times the horizontal and vertical resolution.
- The term vaguer which shows a gradual rise in a row on the ladder of a resolution of a few bases comparative, more established, it is usually somewhat less severe than quartering or Quadrupling - typically less than two-fold, and sometimes not even that much change as make "" wide version; for example, SVGA (800x600 vs. 640x480), SXGA (1280x1024 vs 1024x768), SXGA (1400x1050 vs. 1280x1024) and UXGA (1600x1200 vs 1024x768 - or more fitting, vs. 1280x1024 SXGA, "the next step" conceptual during Commencement UXGA or 1400x1050 of SXGA ). Given the use of "X" in "XGA", it is not often used as an additional modifier (eg no XVGA except the alternative designation for SXGA) unless the meaning is unambiguous.
These prefixes are also often combined, as in WQXGA or WHUXGA, with the stacking rate unimpeded by the same consideration of readability as a decrease of the additional "X" - especially since there is not even a hierarchy or value specified for S/X/U/modifiers.
See also
- Screen resolution; It also includes a standard television screen resolution and HD, which is sometimes used as a computer monitor.
- Graphical display resolution
- Visual display units
- List of common resolutions
- List of video connectors
References
- This article is based on material extracted from the Free Online Computing Dictionary before November 1, 2008 and is incorporated in the terms of the "license" of GFDL, version 1.3 or later.
External links
- Compute and compare display sizes, resolutions, and source material
- Displays the resolution and color bit depth of your current monitor
- Calculate screen dimensions according to the format and diagonal
- Standard resolutions used for computer graphics equipment, TV and video applications and mobile devices.
- Large image from the graphics card history tree
Source of the article : Wikipedia
0 Comments