The C6 needs and has (¤ correct me if I am wrong ¤) only one profile: his own spectral sensitivity characteristics (it's a hard job to build, you need a special light generator, various tiles, not „only” a lab spectro...).
But it needs various display spectra profiles to work (every different backlight+LCD panel combinations, every different plasma panels, every different projector designs - not to mention the projector+screen combo if you wish to measure the screen and ypu should... etc... etc.. --- if you want really good absolute accuracy...).
The EDR file is easier to create, you just measure a few color patches on a display panel or a screen with a spectro (but preferably with a reference grade spectro which is not cheap...).
Could some please explain more simply (not too simple either:D) what the above really means?
1. His own spectral sensitivity characteristics?
2. The difference between the profiles in EDR files and the profliling done by Chromapure (the traditional way), which appears to be the
way it is/was done (Four-Color Matrix Method for Correction)
Now, I know the EDR-magic is what makes the C6 field upgradable. However, how does this factor in the drifting of the filters used in these devices? Would not the drifting change these "spectral sensitivity characteristics"?