HP LP2480zx Possible DisplayPort Calibration Issues with HP DreamColor LP2480z

Possible DisplayPort Calibration

Issues with HP DreamColor LP2480zx

Display

The HP DreamColor LP2480zx color-critical display supports the use of the DreamColor Advanced

Profiling Solution (APS) to recalibrate and/or modify any of the available display color spaces. This

hardware/software solution uses the DDC/CI (Display Data Channel/Command Interface) to

communicate with the HP DreamColor LP2480zx and to both read and write the color space

information.

DDC/CI is an industry standard interface defined by VESA (Video Electronics Standards Association)

and is available via VGA, DVI, DisplayPort, and HDMI connections. Unfortunately, we have found

that there are differences in the implementation of DDC/CI communications channel in the various

implementations of DisplayPort. Depending on the graphics card in your system and its driver, you

may not be able to successfully calibrate the HP DreamColor LP2480zx via this connection.

Though we working with DisplayPort silicon manufacturers to resolve this issue, if you encounter

problems using APS when the HP DreamColor LP2480zx display is connected to your graphics card

we recommend switching to a DVI connection and calibrating via the display via that connection.

All digital connections (DVI, HDMI, DisplayPort) to the HP DreamColor LP2480zx are routed via the

same chipset inside the display and, as a result, a calibration performed on

any

of the digital

connections is valid for

all

digital connections. This digital commonality for calibration was done by

design as otherwise it would be extremely difficult for most users to calibrate the display’s HDMI

input. (Analog VGA signals, on the other hand, can vary depending on the source signal’s accuracy

and are not recommended for calibration.)

It is hoped that we will be able to address this incompatibility in a future version of APS.

For more information

HP displays

HP DreamColor Technologies

© 2009 Hewlett-Packard Development Company, L.P.

The information contained herein is subject to change without notice. The only

warranties for HP products and services are set forth in the express warranty

statements accompanying such products and services. Nothing herein should be

construed as constituting an additional warranty. HP shall not be liable for technical

or editorial errors or omissions contained herein.

March 2009

580177-001