23. Spatial Uniformity

We measured the uniformity of the panel's lighting.

The panel showed adequate uniformity; there were no halos of light in the corners. But the left side was a little less bright than the right, and that was slightly visible when our test model's panel was uniformly lit.

Samsung 960BF: Full Metal Overdrive

Among engineers who design LCD panels there are those who take great pains to keep the overdrive from overshooting too much, and then there are those who just put the pedal to the metal. And here, they've clearly stomped on the overdrive pedal. The overshoot sometimes reached 2.5 video frames before stabilizing (roughly between 50 and 100). Between 100 and 150, things were better, and were down to one frame of overshoot. Beyond that, performance was normal.

But that kind of overshoot is unacceptable, and as we'll see later, it can engender some very dramatic problems.