I have an Optoma HD131X (not to be confused with the name "HD131Xe", it is just "HD131X") which has always impressed me when it comes to image quality, especially regarding colour accuracy and vibrancy.
I have previously calibrated the projector, with amazing results (average Delta-E of <1 across the board), so I know colour performance is normally good. However recently I've noticed the image it projects starting to look a bit dull. I at first put this down to lamp hours (as it is nearly at 4000 out of it's estimated 6000 and putting into the BRIGHT setting does bring back some of that vibrancy, as I normally use Eco), however I then noticed some other strange things regarding colour.
I brought up a 16-235 grayscale test pattern and noticed that value "232" has a blue tinge to it. Lowering the contrast setting by 1 alleviates it. I then brought up some color test patterns on my AVS 709 disc and took some measurements with my colorimeter. On the 100% Color patterns, I noticed red and yellow were slightly undersatured (moslty by red going towards magenta and yellow towards green). Something I know a degrading lamp wouldn't cause. Then I brought up 75% brightness ones and these saturation issues sorted themselves out. For saturation measurements, 25%, 50% and 75% look to be all over the place (so re-calibration cannot solve it). So it's the brighter colours (in luminance, not saturation, that have the issue).
Playing with the settings a bit, I noticed if I drop the contrast to -11 from it's correct -3 value to display all video levels, this issue with the colours goes away on 100% patterns (literally, it suddenly pops from being off to accurate going from -10 to -11). However, at that contrast level, the image would be way too flat looking and dim, plus besides, it was perfectly fine until recently.
I also want to point out this issue significantly worsens with 24Hz and 50Hz signals (also with those refresh rates, the colour wheel emits a buzzing sound, but it's always done that). For 60Hz, it isn't all too bad.
I did some digging around on Google and it seems to point towards a colour wheel issue? Is there anyone here with any knowledge on DLP projectors if you can confirm if it's the colour wheel that is on it's way out? I have attatched two pictures to show the difference before and after lowering the contrast or gain on red. Help would be much appreciated, thanks in advance.
100% Red pattern with the projector at it's correct calibrated values
100% Red pattern after lowering contrast/red gain (as it should be, or has been until recently)
I have previously calibrated the projector, with amazing results (average Delta-E of <1 across the board), so I know colour performance is normally good. However recently I've noticed the image it projects starting to look a bit dull. I at first put this down to lamp hours (as it is nearly at 4000 out of it's estimated 6000 and putting into the BRIGHT setting does bring back some of that vibrancy, as I normally use Eco), however I then noticed some other strange things regarding colour.
I brought up a 16-235 grayscale test pattern and noticed that value "232" has a blue tinge to it. Lowering the contrast setting by 1 alleviates it. I then brought up some color test patterns on my AVS 709 disc and took some measurements with my colorimeter. On the 100% Color patterns, I noticed red and yellow were slightly undersatured (moslty by red going towards magenta and yellow towards green). Something I know a degrading lamp wouldn't cause. Then I brought up 75% brightness ones and these saturation issues sorted themselves out. For saturation measurements, 25%, 50% and 75% look to be all over the place (so re-calibration cannot solve it). So it's the brighter colours (in luminance, not saturation, that have the issue).
Playing with the settings a bit, I noticed if I drop the contrast to -11 from it's correct -3 value to display all video levels, this issue with the colours goes away on 100% patterns (literally, it suddenly pops from being off to accurate going from -10 to -11). However, at that contrast level, the image would be way too flat looking and dim, plus besides, it was perfectly fine until recently.
I also want to point out this issue significantly worsens with 24Hz and 50Hz signals (also with those refresh rates, the colour wheel emits a buzzing sound, but it's always done that). For 60Hz, it isn't all too bad.
I did some digging around on Google and it seems to point towards a colour wheel issue? Is there anyone here with any knowledge on DLP projectors if you can confirm if it's the colour wheel that is on it's way out? I have attatched two pictures to show the difference before and after lowering the contrast or gain on red. Help would be much appreciated, thanks in advance.
100% Red pattern with the projector at it's correct calibrated values
100% Red pattern after lowering contrast/red gain (as it should be, or has been until recently)