With reference to your request for the contrast between adjacent pixel rows this excerpt for a 2000 JVC white paper might be interesting.
4.2 Laser Illumination Sources
The xenon arc lamp has become the standard light source for
film-based projection and high brightness electronic displays.
Emerging laser light sources promise improved image qualitythrough improved MTF and color gamut.
properties of the laser output and the low divergence of the
beam lead to improvements in efficiency for small aperture
birefringent liquid crystal devices such as the D-ILA.
While the application of lasers to projection displays has been
reported for over 20 years, only recently has progress been made
in practical laser sources. These lasers show full-color visible
performance with greatly improved electrical-to-light
efficiencies. The full visible spectrum sources diode pumped
solid state lasers have been used as the illumination light
source for a projector using the 23mm SXGA D-ILA image
modulators.8 The results showed a sequential contrast ratio of
1330:1 and increases of 2-5 times in the modulation at high
spatial frequencies in the projected images.
The color gamut
area was twice as large as the SMPTE 240M color space and
actually two-thirds the total area inside uniform color space
spectrum locus. Speckle was maintained below visible
threshold for a display at SMPTE cinema standard brightness
(12 Ft-Lamberts). An efficiency of ~21/watt was achieved for
the 3000 lumen display.
I have attached a zip-archive of a pdf from Brightside that is now aquired by Dolby. This pdf has no 4-panel lcos diagram but another document from them had one but I am sure you get the picture. There was one extra lcos panel after the recomibation of the rgb lightpaths but before the projection lens. Three rgb lasers surely should simplify the light engine.
HDR_projection.zip 318.2958984375k . file