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HP LP2275w

Roundup: 22-Inch LCD Monitors
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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.

The LP2275w spec states a 6 ms response time. Don't panic: although TN screens regularly have a response time of 2 or 5 ms, you're not comparing apples with apples because this measurement of response times is absolutely useless and doesn't provide any useful information. These measurements rarely represent the actual response time of the monitors in question. That might seem like harsh criticism, but at least it makes our opinion clear. That's why we're going to forget about those 6 ms and take a good look at the screen itself.


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

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.

Films

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!

HP LP2275w
Pros
Cons
  • Base adjustable up and down, pivots
  • Response time
  • Even viewing angles
  • Color balance
  • Display Port + DVI + VGA
  • Default colors
  • Can't use OSD to set colors
  • Power consumption almost twice that of 22'' TNs

Once you've calibrated it, this screen as is near to perfect as you can get--it's just a shame that you have to pay almost twice the price of a standard model.

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