subpixel
Speech parts
1. subpixel - Noun
2. subpixel - Adjective
Meaning
subpixel (plural subpixels)
A subdivision of a pixel, typically used to show the amounts of red, green or blue at a location.
subpixel (not comparable)
In divisions smaller than pixels.
subpixel rendering
Synonyms
Examples
ClearType uses spatial anti-aliasing at the subpixel level to reduce visible artifacts on such displays when text is rendered, making the text appear "smoother" and less jagged.
Images which are scaled down also use subpixel sampling on LCD to increase level of detail.
Like most other types of subpixel rendering, ClearType involves a compromise, sacrificing one aspect of image quality (color or chrominance detail) for another (light and dark or luminance detail).
Note the changes in subpixel intensity that are used to increase effective resolution when ClearType is enabled without ClearType, all sub-pixels of a given pixel have the same intensity.
When the square pixel is divided into three subpixels, each subpixel is necessarily rectangular.
While CRT displays use red-green-blue-masked phosphor areas, dictated by a mesh grid called the shadow mask, it would require a difficult calibration step to be aligned with the displayed pixel raster, and so CRTs do not currently use subpixel rendering.