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Real-Time Anti-Aliasing for Laser Projectors

Real-Time Anti-Aliasing with Six-Beam Laser Projectors
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This device uses six laser beams instead of the usual three. It has two beams each of red, green and blue. One beam of each color is the same as that used in present systems. The other beam of each pair is about three pixels wide. Both lasers in each pair are modulated with the same signal, but the wide beams are kept much dimmer so that they mix a little of their color with the surrounding pixels. Both beams of each pair are aimed at the same pixel (they could actually work just as well if one lagged the other by up to one frame).

In this device, all pixels rely on three sources of illumination to achieve their intended color and brightness:
(1) The light from the three primary beams aimed at that pixel.
(2) The light from the centers of the three wide, dim beams aimed at that pixel.
(3) The light from the three wide, dim beams when aimed at its eight neighboring pixels

What would appear to be a flaw in this idea actually isn't:
It might seem that the antialiasing couldn't work in the case of a white pixel adjacent to one or more darker pixels since one can't darken a pixel by shining light on it. What must be considered, is that for the white pixel to actually BE white would require some light from its neighboring pixels, and in this case not all of them would be white and would therefore leave it slightly darkened. Although the quality of this antialiasing might not equal that achievable by software, it could be suitable for text and previewing vector graphics. The quality could be improved with lenses for the dim beams which yield a calibrated intensity fall-off (with increasing distance from the beam centers).

This device should be used in conjunction with a graphics card able to apply antialiasing to specified regions of the display, so one needn't choose between all of the display or none of it.

The concept could be applied to CRT monitors of course, but they're going out of style.

This is based on an idea from an annotation, but on further thought, it seemed it could be practical, especially for CRT monitors.
Alvin, May 23 2013


//I can only notice pixelation on HD devices if the original content was lower resolution.//
It could help make better use of memory and graphics cards if the pixels, and therefore the physical areas of displays could be larger without obvious pixelization.
Without antialiasing, one can only get so close to the display before he starts seeing the "jaggies" and diminishes his experience.
It would also be cheaper to use antialiasing than to keep increasing pixel counts in order to avoid pixelization.
Alvin, May 23 2013

I'm not insisting that this is equivalent to, or as good as "real" antialiasing. I'm just saying it could provide a fast, easy substitute to improve text and vector graphics and maybe games. It would leave more time for CPUs to do other things.
Alvin, May 23 2013


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