Resolution

The amount of detail of a display or an image, the more pixels per unit more clearly detailed images.
Resolution is what determines the sharpness and clarity of the viewing image. It is expressed as the number of pixels from left to right (or columns) by the number of pixels from top to bottom (or rows). A resolution of 1024 x 768 indicates that the image or screen is 1024 pixels wide by 768 pixels high.

It is known as resolution to the array of pixels (dots) that form an image, defined by the number of horizontal pixels x the number of vertical pixels. These resolutions are known by initials or by these numbers: VGA = 600x480, 800x600 SVGA =, = 1024x768 XGA, SXGA 1280x1024 =, = UXGA 1600x1200, WVGA = 854x480, 1366x768 WXGA =.
Under the resolution is greater image quality will be higher, and the cost of the projector, too.

The sharpness of the video image, signal or display, usually described in terms of "lines of resolution," or pixels. The resolution that is depends on two factors: the resolution of your screen and resolution of the video signal. Since the video images always have the form of a rectangle, there is the horizontal resolution and vertical resolution. Vertical resolution: The number of horizontal lines (or pixels) that can be solved from the top of an image at the bottom. (Think of hundreds of points or lines horizontal piled on others.) The vertical resolution of NTCs NTSC analog TV standard is 525 lines. But some lines are used to transmit other information such as text captioning, test signals, and so on., To finish with about 480 lines in the final image, no matter the source.

Then, all the typical NTSC sources - VHS VCR, cable TV broadcasts or by air (analog), satellite digital TV other than HD DVD players, camcorders, etc.. - Have vertical resolution of 480 lines. The signals of DTV (Digital Television) have vertical resolution that ranges from 480 lines for SDTV, to 720 or 1080 lines for true HDTV. Horizontal resolution: The number of vertical lines (or pixels) that can be resolved from one side of the image to another. The horizontal resolution is a deceptive concept, because while the vertical resolution of all sources of video (NTSC) analog are the same (480 lines), the horizontal resolution varies according to the source. Some examples of typical sources: VHS VCR (240 lines), analog TV transmissions (330 lines), satellite digital TV that is not HDTV (up to 380 lines), and DVD players (540 lines). DTV signals have a horizontal resolution of between ([#]} lines for SDTV, to 640 lines (for 1280p HDTV) or 720 lines (1920i for HDTV).