Backlight/ Screen Uniformity Some sacrifices need to be made to build a flat-panel TV this thin, and the area that is usually hit the hardest is backlight/ screen uniformity, due to the sheer proximity of the LCD sheet to the front glass, a
s well as the edge-mounted nature of illuminating LEDs. Even after calibration, the 40D5520 exhibited a few patches of clouding on predominantly dark scenes, although these became less apparent when there’s a bright object on screen (to distract our gaze from the uneven patches), or under stronger ambient light (for example during the daytime). Dialing [Shadow Detail] down to the minimum setting of “
-2” did mask the clouding to a degree, but then any jump in black level would become too conspicuous when auto-dimming kicked in.
Generally speaking, the severity of clouding on LCD panels can vary from one unit to another. The Samsung UE32D5520 may fare better in this regard: smaller screen sizes are usually less prone to uniformity issues since it’s easier to illuminate them evenly.
Motion Resolution The Samsung UE40D5520 is equipped with 100Hz “Clear Motion Rate” MCFI technology, which can be activated via the [LED Motion Plus] option in the user menu. However, the result was not really what we had hoped for: engaging [LED Motion Plus] introduced obvious interpolation artefacts around and even within the moving objects, so much so that measured motion resolution actually dropped paradoxically to 250 if we went by the test pattern found in Chapter 31 of the “
FPD Benchmark Software For Professional” Blu-ray disc. Disabling [LED Motion Plus] restored the number of moving lines resolved to 300, the prevalent baseline figure for bog-standard LCD displays.
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