HP LP2475w

Even though the HP LP2475w is a monitor that's primarily aimed at the business market, lots of readers have asked us to test it. It has plenty of sought-after features for both consumer and business users - an IPS panel for a start - making this monitor an attractive choice that everyone's got their eye on.

Impressive design and handling

Monitors intended for business use often boast better design and handling than those designed for the consumer market, and the LP2475w is no exception with its impressive range of features. It has a height-adjustable stand that's mounted on a rotating base and it even has a portrait mode. It has an IPS panel, offering wider viewing angles than a TN panel, as well as improved colour homogeneity. It also has DVI, HDMI, DisplayPort, YUV, S-Video and composite connections, not to mention a 6-port USB hub (two on the side and four at the rear). Audio connections include a coaxial S/PDIF output, allowing sound coming from the HDMI entry to be channelled through an amplifier or a 5.1 speaker-set with a decoder such as the Logitech Z5500.

Colours need recalibrating

Default colours

Ideal colours Compare the LP2475w to other LCD monitors in our product Face-Off

Before doing anything whatsoever that requires any degree of image quality, it's essential to recalibrate the LP2475W either by yourself or using a ready-made profile. The default colours are crazy and can't be corrected via the internal menu. This is almost certainly due to the fact that this is a wide-gamut monitor, as although this type of screen can display more colours than regular screens, they have real trouble effectively scaling colours back down to the sRGB colour space. There's usually some kind of mode available to help take care of this, but in the LP2475W it made no visible improvement. So with the risk of repeating myself, I'll say it again: you need to recalibrate!

Although HP is advertising a contrast ratio of 1000:1, we measured a best value of 680:1. If the brightness is dropped to 15 to reach 100 cd/m² (brightness widely used in image-processing industries), the contrast ratio drops to 650:1. But that's one of the problems associated with IPS technology: this type of panel has real trouble displaying a deep, rich black and this directly impacts the quality of the contrast.

Responsiveness: watch out for the reverse ghosting!

Coloured   Transparent
Average ghosting over ten frames

Bad news! The LP2475w suffers from fairly marked reverse ghosting. In other words, moving objects on the screen are followed by a streak of complementary colours.


This makes the ghost images much more visible than with regular ghosting. It also means that this monitor is no good for gaming and is better left to general office computing or image editing (after calibration of course).

Upscaling: could be better

Given that we were reasonably impressed with the upscaling on the Philips 240PW9, a monitor with the same type of panel, we had high hopes for the LP2475w. Unfortunately, with both a 1080p and a 576p source, this 24-inch monitor really struggled with its upscaling. The only good thing is that granular noise is kept pretty much under control.