View previous topic :: View next topic |
Author |
Message |
jbltecnicspro
Joined: 23 Apr 2016 Posts: 512
|
Link Posted: Sun Apr 23, 2017 9:00 pm Post subject: What am I doing wrong? |
|
|
Good afternoon all,
A couple of times, I've tried to calibrate my DLP projector (Yamaha DPX-1200 if you need the model number) using my old DTP-94 colorimeter and I've had terrible luck. I just cannot position the puck to see the screen properly it seems. I'm very sure that my meter isn't broken (it has no problem reading direct view displays).
I'm using HCFR and using Argyll CMS drivers for it, if that makes a difference.
And yes Kal - I'm aware that my meter is old and I probably need a new one for more guaranteed results. But I have what I have at the moment. I would love to afford an i3 Display and a spectro to recal it every time but I cannot afford to do so. Thanks in advance.
|
|
Back to top |
|
|
kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17860 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
|
|
Back to top |
|
|
jbltecnicspro
Joined: 23 Apr 2016 Posts: 512
|
Link Posted: Mon Apr 24, 2017 11:25 am Post subject: |
|
|
kal wrote: | When you say "I just cannot position the puck to see the screen properly" what do you mean exactly? What problem(s) are you having exactly?
Kal |
Whenever I try to take a reading from the screen, I'm getting some really "off" measurements. If I do a full white screen, for example, HCFR says that it's only getting a reading of Y = 7 (which is measured in cd/m2 or nits I believe). There's absolutely no way that the meter can be seeing the screen correctly because 7 cd/m2 is pretty dark. I don't remember the exact ft lamberts measurement but it's super low. Which can't be right because the light output is very much bright enough for movie viewing.
|
|
Back to top |
|
|
kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17860 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
|
|
Back to top |
|
|
jbltecnicspro
Joined: 23 Apr 2016 Posts: 512
|
Link Posted: Tue Apr 25, 2017 12:00 am Post subject: |
|
|
I'll give it a shot again tonight. I should have some time. I think I'm reading the shadow. Where should I place the meter? My projector is table mounted and is a DLP projector, so only a single source of light.
I want to place it near the screen but obviously the closer I get the more prone to reading its shadow the meter becomes. Do I need to hold the meter at an angle?
|
|
Back to top |
|
|
kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17860 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
|
|
Back to top |
|
|
jbltecnicspro
Joined: 23 Apr 2016 Posts: 512
|
Link Posted: Wed Apr 26, 2017 10:11 pm Post subject: |
|
|
Okay, well I was able to get the meter to read a little better but it was only 20 cd/m2 at the brightest iris mode of the projector. It's a new bulb (only 175 hours) and only projecting on a 92 inch 1.3 gain screen - not to mention it's pretty damn bright, so I'm sure I need to experiment more. I will probably need a tripod as my arm was tired after walking around the room and holding my meter up. Thanks for the help Kal.
|
|
Back to top |
|
|
kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17860 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
|
|
Back to top |
|
|
|
|