Problems noted by users
Lets be clear. The unit we received had no faults. But maybe we shouldnt completely ignore the problems some forum users have reported. After all, a stitch in time
- Green/blue line that flickers from time to time during use.
- Crackling problem when lowering brightness.
- And more rarely, black screen problems during use.
Note that these problems were confined to just a few users. They may well just result from a defective series.
Here is yet another monitor that skips the TN panel for something new. The LP2275w uses PVA technology, which promises excellent contrast, deep blacks and very even viewing angles, unlike TN screens which appear to dip to black when you look at them from above or below.
Essentially, this is a screen that's aimed at professional users. The design has been noticeably refined from what we're used to on other monitors from HP. With a matte finish and a square base, it's a long way from the look and feel of the more mass-market range. However, behind the scenes on this screen which looks like some of the first generation LCDs is a real gem: the base might not be much to look at, but it's height adjustable and can pivot. The frame shares this practical design philosophy, with VGA, DVI and Display Port inputs. On one side, there is a two-port USB hub adding to the other two at the back.
So, let's have a look at the 'orange circle test', where the move to PVA should allow for very wide viewing angles as well as homogenous colors that TN panels can't even dream of.
In fact, with an average of just 0.55 frames of ghosting with a colored image, the LP2275w is in fact more responsive than the average 2 ms TN screen, which would be closer to 0.8 frames. The record is still with a TN however, the Samsung 2253BW, which we measured at 0.35.
However, gamers should know that the LP2275w has about two frames of input lag.
Color quality suffers from a dominance of blue and even if this is almost invisible in the different shades of grey, it does alter the quality of other colors quite severely. Unfortunately, it wasn’t possible to correct this using the OSD. The only way of really improving color rendering is by callibrating with a sensor.
A question worth asking: is the black as deep as usual? No. 0.25 cd/m² for the black with white at 200 cd/m², is only 'acceptable'. If you are used to working on a fairly dark screen however, like image professionals, you will be delighted to hear that at 100 cd/m², the black goes down to 0.14 cd/m².
When it comes to films, this monitor is not like the others. A correction chip would have been some help in reducing flickering and compression faults. Nevertheless it does do better than your classic TN because at least you don’t have to point the screen in a particular direction to be able to see the image. This is what the PVA panel is all about: no blind spots from any direction!
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