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73 | NEC DISPLAY WALL CALIBRATOR - USER’S GUIDE

Chapter

Frequently Asked Questions

Conguration

Question: Can I use NEC Display Wall Calibrator to calibrate a single display?

Answer: Yes. Use the Layout Wizard to create a layout with a 1x1 video wall, and calibrate as normal.

Question: How can I congure a video wall that is not rectangular in shape?

Answer: Create a layout with the maximum number of rows and columns of displays. Then disable the displays in the

layout that are not part of the video wall. To disable a display, right click on the icon for the display in the main window

and select Disable. It may be necessary to manually re-congure the Connection settings for some of the displays since

the Layout Wizard will have assigned IP addresses or IDs sequentially for all displays, including the disabled ones.

Calibration

Question: How often will I need to use NEC Display Wall Calibrator to re-calibrate a video wall?

Answer: The time until the displays need to be re-calibrated will depend on many factors such as the environment and

duration they are used, the age of the displays, the calibration Target settings used, and how critical the color matching

requirements are. Newer displays will tend to drift more rapidly than displays that have been in use for several days or

weeks. Typical re-calibration periods could be six months for most applications and as low as one month for color critical

applications.

Question: If one of the displays in the video wall is replaced, will it be necessary to re-calibrate the entire video wall?

Answer: It depends on the particular type of calibration settings being used, and the performance of the new display

compared to the existing displays. If the new display is much brighter than the existing displays, then in most cases it

is possible to only calibrate the new display in order to match the others - since it can be adjusted down in luminance

to match the other displays.

However if the new display is about the same brightness as the existing displays, or less, then the existing displays may

need to be re-calibrated in order to match the new display since it may now be the dimmest display.

Also the existing displays may have drifted since the last calibration so it may be necessary to re-calibrate all of the

displays. Alternately, if re-calibrating the existing displays is not a suitable option, a new Target setting can be created

by measuring the actual white point of one of the existing displays using the “Custom White Point dialog” on page 44,

and using this new Target to calibrate the replacement display.

Question: Why can’t I get all of the displays to match perfectly, and what can be done to improve the matching?

Answer: The displays may not all match perfectly due to several reasons, such as:

1. The color and brightness uniformity of the screen is never perfect and will vary across the screen area. However the

color sensor is only measuring and adjusting the center of the screen.

2. When evaluating displays visually, we tend to look at the joints were adjacent displays meet. The edges of the

displays are typically most non-uniform.

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NEC Display Wall Calibrator Guía de usuario Pagina 73