I was wondering if someone would give me advice on how I may proceed to fix black crush issues on an older jvc x500 projector.
I have been using settings produced by others over the Internet and in general have been happy. Lately, though not sure how long it has been that way, I have noticed that the blacks appear crushed. Brightness had been set to +3, gamma 2.3. Looking at a dark scene, I up the brightness to +13 and now can see detail. However, image is washed out. In the gamma menu, I raise the dark level to +7 and reset brightness back to +3. I can now see more dark detail, though the image now appears to have less contrast. My first question, is this gamma droop, common to most jvc projectors as they age?
I see that it may be possible to fix gamma droop using a spyder 4 with the JVC autocal software. Basically I'm wondering if it's worth the effort to acquire a used spyder 4 and go through the process of re-calibrating the projector. I do understand that meters drift over time, so it will be a crapshoot on whether any spyder4 I pick up will be usable. Just for fun and to get my feet wet, I dusted off an old Eye One Display LT and ran it on old version of HCFR to see how the x500 measures. I did a 10 point greyscale measurement. Over the range from 10% to 90% grey, blue was 130%, green 110%, and red 30%. Using 80% grey test pattern and adjusting gains by lowering green and blue, I was able to get each of red/green/blue to approximately 100%. However, visually, the 80% grey did not look grey anymore. It was quite noticeably red. On the gamma graph, it was quite flat across the range, though average was at 1.9. Can I assume that this exercise has determined that the meter has drifted and that this old I1 Display LT is essentially not usable anymore?
I don't know if I understand the process very well, but I see through various postings that if I have a reference meter and Chromapure software I may be able to adjust the Spyder4 to produce correct results. Sorry I'm not sure of precise terminology. Obviously, this is additional cost, but may be worth it.
So, I'm wondering where to go from here. I'm generally happy with color, overall brightness, but not too happy with shadow detail and the image is kind of washed out when gamma dark level is increased on the projector control. I'm hoping to live with the projector for a few more years.
Do we know if any part of the JVC autocal process might be useful for me with a used spyder4 sensor? Perhaps I could follow up with manual calibration with an i1d3 with hcfr?
thanks to all in advance