Originally Posted by T( )( )L
It's impossible to get a stable reading @ ire 100 in continous mode on my display (lg oled b6) the white point creeps around on the screen since the panel luminance seems to fluctuate,it might be that i have both meters in contact mode (as close as possible together) and the uniformity on the screen gives me that error?
When you are measuring an OLED, just test 3-4 measurements of the same patch, to check repeatability, don't keep the same pattern displayed to the screen for much time.
If you look to any of the disk chapters, all patches are autochange to the next one after 10 sec and there 1.5 sec black frame between measurements, to separate the patches, you can use for example any Color Gamut Chapter of CalMAN which is starting my displaying 100% White (take 3 readings) and let the chapter flow to the next color (Red....Green...Blue etc..) and see the repeatability you have.
CalMAN use small exposure (to bright patches/higher to darker patches) time sample when you select 1 sample, when you select 10 sample, it's doing the same and it's displaying to you the average. I prefer better to use one of the selectable exposure times from xx sample selection.
Repeatability has to do with exposure time settng (a higher setting will provide a more stable readings) and the selected sync option. It needs to spend some time to find out what setting provides better balance between repeatability/quick measurment time).
Try dark shades also, small exposure time can provide read error in dark patches.
To find some dark patches (10% RGBCMY for example) go to the Meter Setup Page:
Select the DIP Mode 10-Point Cube and it will start displaying about 10% Luminance patches of the primary/secondary colors, there the patches are autochange per 20 sec, because meters like i1D3 (OEM/OEM Branded like C6/Retail) take more time to read dark patches.
The original purpose for these DIP Mode chapters is for LightSpace users where the software has an option to 'measure and log' so you can select to measure in continuous mode and when you press stop, it will export you an excel file with the xyY and measuring time per each meter read (in milliseconds) so it's easier to keep all the data per each meter setting, do all measurements with different meter modes, collect all measurement data, and when you have time examine the excel files to find out what meter setting is better for your display.
By selecting 'measure and log' from LightSpace, you will be prompt to enter a File Name, for Example you can type ''5% Red'' and after clicking ok, the LightSpace will take continuous readings of the pattern you are displaying, as long time as you want, to stop this , press ‘’Stop Measurement’’...
After doing that, a ‘5% Red.cvs’’ file will be created and you will be able to open it with Excel to see the xyY Readings and the time it took for your meter to read this patch.
This is an example of the CVS file Data contents: