OLED-TV|Laser-TV|SED|Display|FED|

A very good article from http://www.technologyreview.com about the LASER-TV technology:
At the heart of a laser TV is the same technology found in projection-television systems. Indeed, many of the laser TVs sold by Mitsubishi and Samsung next year will include a popular projection system called digital light processing, or DLP, developed by Texas Instruments. The main difference between traditional projection and laser TV is the light source: most projection systems use a white-light lamp, whereas laser TV uses an array of lasers.

Lasers, emitting beams of red, green, or blue light, shine on an array of thousands of micro mirrors. Each mirror represents a single pixel. The mirrors are controlled by an electrical signal that causes it to tilt either toward or away from the light source. If the mirror tilts away from the laser, the corresponding pixel is black; if it tilts toward the laser, the corresponding pixel is the color of the laser light. These mirrors switch "on" and "off" thousands of times a second, and the lasers shine on the mirrors in varying intensity, mixing the fundamental red, green, and blue. The result is a huge gamut of colors.

In contrast, lamp projection systems produce color by using a color wheel--a spinning disk usually containing red, green, and blue--that is placed between the lamp and the micro mirrors. This spinning wheel also produces an array of hues. However, the main advantage that lasers offer over traditional projection is an increased richness in colors, says Mooradian. The color of light produced by a laser is, by definition, spectrally narrow, varying less than one nanometer on either side of the peak wavelength. The filters used for lamp-based projection systems aren't as spectrally pure, varying as much as 20 nanometers, he says. Our eyes can detect this difference, and when the colors are more spectrally pure, they appear more vivid.
Full article Technologyreview