Order of LEDs on the Side

The movement to replace the traditional fluorescent (CCFL) backlighting for LCD displays with LEDs has become a flood. Sony’s 2011 lineup is dominated by LED-lit LCDs. While the line-topping XBR-HX929 sets have full-array LED backlighting with local dimming, the remainder position their LEDs just beyond the edges of the screen. Aside from lower power consumption compared with CCFL blacklights, LED backlights of either type offer another benefit: They can adjust rapidly in accordance with the changing signal. Edge-lit LED backlights have two primary advantages to manufacturers over the full-array approach that has made them the more widely used. One is lower cost; the other is the ability, at least in some HDTVs, to shrink the depth of the panel to something that seems to approach that of a credit card.

Performance
Value
Build Quality

Cue the Qs

KEF’s Q Series, improved over multiple generations since 1994, has long been the British speaker company’s bread-and-butter line. The new Qs, which began shipping earlier this year, were designed in the U.K. and are manufactured in China.

Up to the present, all 3D HDTVs have used active shutter glasses, and most still do. The two separate 3D images—one for each eye and each of them full 1920-by-1080 resolution—flash on the screen in sequence. Active shutter glasses are triggered by an IR signal generated by the 3DTV (or a separate transmitter attached to it). To isolate the 3D images to their respective eyes, the glasses alternately open and close each eyepiece. The alternating is rapid enough that even though the two pictures are displaced in time, the brain fuses them together and sees them as a single 3D image.