Join Date: Mar 2018
Location: Sunny (when it's not raining) Devon, U.K.
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After getting the opportunity to test both the Android and iOS beta versions of the upcoming release of LightSpace Connect, I can share some of my findings so far.
Testing was performed on an LG C9 in SDR Cinema picture mode. Prior to testing, I reset the picture mode and disabled ALL post processing, set OLED Light to 26 to output 100 nits, colour gamut was set to wide, gamma 2.4, and I did a very quick manual greyscale adjustment using the RPi PGenerator as my pattern source (controlled by CalMAN's UPGCI) and the manual calibration workflow in CalMAN Home for LG. I did this as it has been confirmed many times that the RPi Pgen is bit accurate when configured correctly.
Also, through previous testing I have compared RPi Pgenerator results to the LG iTPG results and found them to be matched, so after my (very quick) greyscale adjustment using the RPi, I connected to the LG iTPG and hit read series, the results of which can be seen in the attached screenshots. I then took a read of 100% R-G-B with 100% stimulus. These are the readings I have used to compare the results of the LightSpace Connect generated patterns via CalMAN's UPGCI.
With the beta version of the iOS App, I cast the generated patterns to the display using the Screen Mirroring function of my iPhone XS directly to the C9's built in Airplay 2 function as I only have an ATV 4K which is confirmed not to have an accurate output. Connection was quick and flawless, as was the rest of the process. I did get a warning flash on my phone screen as I reached the 25 patch limit (this did not display on the C9), but it continued to generate the patches, perhaps as it is the beat version? I would assume once this version is out of beta, the (modest) in app fee would be required to continue past the 25 patch limit of the free version. Results measuring greyscale and the same R-G-B patches were very, very good!! Any discrepancies could be attributed to panel drift (time between measurements). As the third generation ATV is confirmed to have an accurate output, this could conceivably be considered as a viable solution for patch generation!!
For the Android beta version of the App (again controlled via CalMAN's UPGCI), I had to unfortunately use my Chromecast Ultra as it I could not seem to find the built in Miracast function that was on my previous LG OLED's. If it's there, I can't find it. If it is still available and anyone knows how to enable it then I'd be happy to test that in the near future, otherwise I will test it on my C7 when I get the chance. But for now the CCU results will have to do despite the CCU output confirmed to not be accurate. To get the CCU to output 16-235 patterns within CalMAN, I had to set the patch range to 0-255 to read a 0% Black and 100% White. CCU obviously messes with the signal output significantly which caused luminance to drop a little, but other than that, results were "acceptable". An accurate Android (Fire Stick???) device is likely to have better results and thus could also be considered a viable patch generation solution. Direct casting to the TV may also work. I will test direct casting using Miracast at the earliest opportunity on my C7.
Finally, just for kicks I decided to compare these results against CalMAN's own MobileForge App, and this was done using both the iOS and Android versions in the same manner as I tested the LightSpace App. The results of the Android version of MobileForge using the same Android phone displayed via CCU can also be seen below and greyscale results were okay. I had to once again set patch scale in CalMAN to 0-255 as I did before, and luminance was actually a little closer to the initial RPi setup and iTPG readings. But the differences in the R-G-B measurements can clearly be seen, especially in Green luminance. I measured this 3 times to rule out a misread, but it returned the same values each time. I also tried several times to use the iOS MobileForge App directly Mirrored via Airplay 2 to the C9, but it crashed about halfway through the greyscale each and every time.
It should be noted that the tests I did were completely unscientific. The initial manual greyscale adjustment I did took all of 15 minutes (maximum), and was only done to set a fairly reasonable baseline for readings to be compared to. I also left the scales in the CalMAN result charts at their default values rather than narrow the scale range to a more zoomed in view. But even though it was an unscientific test without "reference equipment" or signal analyzers, the fact the RPi has been verified bit accurate and the iTPG matches it, comparing LightSpace Connect to those results shows that if using it on a device with an accurate output, it is, in my opinion, a viable test pattern generation solution at a very modest price if you unlock the full unlimited version via the in app purchases.
Nice work Steve!
LG OLED65C9MLB**Denon AVR-X3500H**Focal Sib Evo Atmos 5.1.2**Sky Q UHD**Xbox One X**Panasonic DP-UB820**ATV 4K**Harmony Elite
i1D3 OEM**i1D3 Retail**i1 Pro2 OEM**LightSpace HTP**CalMAN Home for LG**RPi Pgenerator**Ted's Disk & Media Files**S & M HD & UHD HDR Benchmark Disks**HD Fury Integral 2