http://stuffo.howstuffworks.com/tv3.htm�
http://bugclub.org/beginners/history/MonitorsHistory.html
Pixel� � A pixel on a monitor is a number of red, green, and blue phosphor dots. These dots are "excited" to varying degrees by the monitor's three electron guns, and the results mix additively to generate a specific color. By manipulating large numbers of pixels in precise ways, patterns emerge to make up an identifiable picture.
http://www.grc.com/ctdialog.htm
Confusion over Sub-Pixels and CRTs
The single most often asked question is: "Why can't sub-pixel technology be used with CRT's?" This is an important point because so many CRTs are being used today and everyone wishes that they could also achieve the promise of this display clarity gain! I don't blame anyone for being confused by this since this is a place where our intuition fails.
So that you can get some sense for the various approaches and very good ideas suggested by these people and really come to trust my reply here is a characteristic sampling of people's thoughts and questions:
Why will only LCD displays users gain all advantages? I disagree with "... this technique is not applicable to high-resolution Cathode Ray Tube (CRT) displays". In my opinion the matter is geometry and algorithms, not the screen design. Suppose that CRT display's pixel consists of three round "subpixels" arranged in a triangle 
traditional CRTs. With rather evident changes in rendering algorithm (it will be a little bit more complicated) the same approach is applicable as for rectangular subpixels and with almost the same resolution improvement.
I understand that most CRTs can't use the (alleged) ClearType system, since a phosphor tri-dot tube has the RGB elements arranged in a cluster. However, Sony Trinitron tubes have columns of R,G,B elements wedged tightly together (I believe in that order). Why would the pixel-splitting trick not work on such a CRT? I have a Sony monitor on my desk, and I can see the color fringe on the RGB sub-pixel rendering examples.........
What is a Pixel 
Stands for one picture element (one dot on a computer monitor); commonly used as a unit of measurement.
www.oit.ohio-state.edu/glossary/gloss3.htmlOften referred to as
dot, as in "dots per inch". "Pixel" is short for picture elements, which make up an image, similar to grains in a photograph or dots in a half-tone. Each pixel can represent a number of different shades or colors, depending on how much storage space is allocated for it. Pixels per inch (ppi) is sometimes the preferred term, as it more accurately describes the digital image.
coloradodigital.coalliance.org/glossary.htmlThe picture elements that make up an image, similar to grains in a photograph or dots in a halftone. Each pixel can represent a number of different shades or colors, depending upon how much storage space is allocated for it. Raster the grid pattern applied when an image is scanned.
memory.loc.gov/ammem/techdocs/qgloss.htmpicture element:
a dot, a grid point on a computer display, the smallest entity that can be drawn on a computer display
www.piensa.com/lpi/p-glossary.html
http://www.computerwriter.com/Star/2000/oct/cw1-0500%20-%20mailbag%20-%20LCD%20monitors.htm
On a CRT, each pixel (picture element, defined as the smallest area of the screen that the computer can change) will contain at least three, but often many more, fluorescent dots on the inside of the monitor face. The distance between the dots (dot pitch on a shadow mask monitor with round holes, stripe pitch on an aperture grille model with a rectangular array), determines whether the picture is sharp or grainy.
http://www.clintonelectronics.com/cmdmedical.htm
The CRT line of displays ranges from 2 mega-pixel to 5 mega-pixel in both Portrait and Landscape formats. All displays feature digital controls, Laminated Anti-Reflective coated panels, different input options, and Dispenser Cathodes. In addition, custom phosphor options are also available on all display models. .......
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