Here we go, my first attempt with a shiny new USB microscope. This shows the intersection of a one pixel diagonal line and a one pixel horizontal line. You can clearly see the driver uses individual sub-pixels for black, giving a slight colour fringe from the "left over" sub-pixels of each 2x2 block that are set at white.
Many more pictures to come I'm sure when I get the hang of it...
(click to embiggen...)
Andrew