![]() ![]() The origin of subpixel rendering as used today remains controversial. ![]() The word would appear white on the screen because red, green, and blue light combined are indistinguishable from white light to the human visual system. Pixels on an LCD are made up of separate red, green, and blue elements, which can be used to give finer control over rendering the curvature of text. For example, if the display uses triangularly-arranged subpixels, subpixel rendering that assumes RGB stripes will produce color fringing at the edges of text. If the subpixel rendering algorithm does not take into account a display's unconventional primary colors like in an RGBW LCD or an RGBW organic light emitting diodes (OLED) display, or unconventional subpixel locations like in a display that uses R, G, and B primaries placed in a triangular arrangement instead of using RGB stripes, subpixel rendering can fail. In a CRT it would require the designer to know precisely where each pixel hits the display's aperture grille, alignment variations that are part of the production process, and variation in the beam steering electronics, make this virtually impossible. The technique should have good application to RGB LCDs and other display technologies that organize subpixels in the same way as RGB LCDs. The technique needs to be matched to the panel that it is being applied on to work. Subpixel rendering is better suited to some display technologies than others. Over a certain resolution threshold the colors in the subpixels are not visible, but the relative intensity of the components shifts the apparent position or orientation of a line. The components are easily visible, however, when viewed with a small magnifying glass, such as a loupe. These pixel components, sometimes called subpixels, appear as a single color to the human eye because of blurring by the optics and spatial integration by nerve cells in the eye. Some displays have more than three primaries, such as the combination of red, green, blue, and yellow (RGBY) or red, green, blue, and white (RGBW) or even red, green, blue, yellow, and cyan (RGBYC). The previous image, with the R, G and B channel separated and animated.Ī single pixel on a color subpixelated display is made of several color primaries, typically three colored elements-ordered (on various displays) either as blue, green, and red (BGR), or as red, green, and blue (RGB). ![]()
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