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HC1080UB Projector Measurements and Calibration 2

Posted on January 18, 2008 by Art Feierman

It took some work to get good measurements, but the final results produced a very watchable picture, even if the range in color temperatures still varied quite a bit from white to dark gray. Further tweaking, of course, can tighten them up, but, it is, to a large extent, trial and error:

Color Temperature 8000K
Offsets Red -3 Green 5 Blue -14
Gain Red -6 Green 14 Blue -15
White (100 IRE) 7029K
Light gray (80 IRE) 7595K
Medium gray (50 IRE) 7968K
Dark gray (30 IRE) 7586K

For those looking for a "living room" setting closer to 6500K, I suggest simply dropping the Color Temp to 7000K.

Dynamic Mode

White (100 IRE) 6551K
Light gray (80 IRE) 6662K
Medium gray (50 IRE) 6553K
Dark gray (30 IRE) 6413K

That's about as good as it gets - except for green, which is pushed way up, to kick out more lumens, and cut through ambient light. Green was WAY up at white (100 IRE), and continuously dropped down to where it should be by 30 IRE (dark gray).

I targeted getting between 7500 and 8000K for my desired Dynamic mode, and getting there required these settings:

I set Color Temp for 8000K (probably should have used 7500K, so you might want to try that). Of the Offsets and Gain controls I left everything at 0, except for Green Offset 2, and Green Gain of 1.

The end result for Dynamic

Header Content
White (100 IRE) 7510K
Light gray (80 IRE) 7763K
Medium gray (50 IRE) 8291K
Dark gray (30 IRE) 8120K

This worked out very well. The green component was still a little high at 100 IRE, and just slightly low at 30 IRE.

Although I never remeasured, I ultimately spent most of my Living Room mode time, with the settings mentioned, except dropping Color Temp to 7500K from 8000K. On some content, 7000K looked even better (when comparing in a dark room). Remember, this mode is for cutting through ambient light, and gives up some overall picture quality. With over 1500 lumens, even after adjustments, it's very good at handling some ambient light.

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