For all its shortcomings, CES never disappoints when it comes to TV screens. A substantial advancement we were unable to squeeze into last week’s issue, no thanks to the show’s AI frenzy, came not from Sony or Samsung, but instead from Hisense – showcasing a new double-layered LCD panel technique which has been largely received as an engineering masterclass. Hisense unveiled the ULED XD, overcoming a problem called backlight bleed which is apparently quite common in LED TV sets. The Chinese electronics firm achieved this with an unconventional breakthrough in a secondary layer panel, essentially filtering brightness from the secondary panel (grayscale 1080p), halting any backlight bleed from reaching the primary layer, a 4K UHD LCD panel. The result –…