This document explains how to use the camera calibration tool and please note that only one model of X-rite Calibration tool (SKU: EODIS3-DCOE) works Vestel Product.
Note: Must have above V7.66 firmware on product for X-rite WB calibration.
When “Colorimeter Support” is enabled at profile, “Auto Color Alignment” menu item becomes visible in the Signage Settings / Controls menu dialog as shown in Figure 1.
Figure 1: Control Menu
When the menu item is focused, pressing left and right arrow keys of remote controller enable setting target color temperature to one of the possible color temperatures in Figure 2:
“Warm (6500K)“, “Normal (9300K)“, and “Cool (13000K)“. After setting the target color temperature, auto white balance adjustment operation starts by pressing OK button of remote controller on the “Auto Color Alignment” menu item.
Figure 2: Color Temperatures: Warm-Normal-Cool
Operation Details
As auto white balance adjustment operation is started,
1)All of the menu dialogs are hidden.
2)Current color temperature is set to the selected target color temperature.
3)Red color pattern is applied to the TV screen.
4)Green color pattern is applied to the TV screen.
5)Blue color pattern is applied to the TV screen.
6)White color pattern is applied to the TV screen.
7)You can see luminance and backlight values on the screen
8)Press the back button on the Remote Controller
9)You should do same-steps other color temperature options ( Cool-Normal-Warm)
10)At the end of the operation, white balance setting for the selected target color temperature gets updated.
Note: You can access application video from here.
For a multiple VideoWall applications (2×2, 4×4 etc.), please note down the luminance value, in Figure 3, for each screen. Then let the luminance values of all screens be equal to the lowest luminance value by decreasing brightness on the other displays in order to get the almost equal picture performance.
Figure 3: Luminance Values
Below OSD Menu ways are followed to reach RGB gain parameters which will allow changing color adjustments on screen as shown in Figure 4.
MENU > System > Picture > Advanced Settings > RGB Gain > Red Gain/Green Gain/Blue Gain
Figure 4: RGB Gain Parameters
Examples of different white tones (temperatures) are below in Figure 5, please note that a standard production never ends up in such a wide variety/difference, these video walls are just manually forced to show different white cases. Hence, only a fine-tune may be needed in the field. All RGB gain parameters are default 1024 maximum valued. If a white fine-tuning is needed, below cases can be followed
Figure 5: Examples of different temperatures
A full white pattern must be applied to compare walls ;
1.If a VW is bluish than others,
- Blue Gain should be decreased one by one from 1023 comparing the result every step.
2.If a VW is greenish than others,
- Green Gain should be decreased one by one from 1023 comparing the result every step.
3.If a VW is reddish than others,
- Red Gain should be decreased one by one from 1023 comparing the result every step.
Note: Please pay attention to the following technical details:
Decreasing blue gain results in a warm white (visibly a yellow-white just like red and green are increased together)
Decreasing both red and green gain results a cool white (visibly bluish white)
Gain parameters should not be decreased excessively to prevent a color shift in pictures.