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Calibrated LED TV too bright and washed out

 
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    CurtPalme.com Forum Index -> Audio & Video Calibration
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daddycool



Joined: 13 Jul 2012
Posts: 1


Posted: Fri Jul 13, 2012 12:55 pm    Post subject: Calibrated LED TV too bright and washed out

Hi,
Great dummys guide on calibration, if it wasn't for that I wouldn't even own a calibrator Smile

I spent a couple of hours calibrating my new TV last night, it's a Panasonic 42ET5B.
I'm using an i1d2 and colourHCFR, with the AVSHD709 test disc (windows).

This is what I did...
Turned all the extra settings off;
Set the picture modes to Cinema and Warm
Set the contrast on the 100% white to around 35ftL;
Set the brightness using basic reference test 1 (the image with the flashing black bars and reference black at 16 or 17);
Adjusted greyscale at 80 and 30 with white balance.

I ran the greyscale measure and my graphs were awful, despite most of the x and y readings being 0.313 and 0.329 +/- upto 0.003 (IRE 0-20% still a bit off).

So I adjusted the gamma in the tv menu from 2.2 to 1.8 and ran greyscale measurement again. The results according to the graphs were pretty good (the averages at least). I've attached the colourHCFR file.

But, the picture is very bright and washed out. I was in a dark room, so I'm wondering if just need to turn CATS on (I'm at work at the moment).

I'm sure it's the low gamma that's washing out- does that mean I have the wrong contrast or brightness set?

I'm a tiny bit confused on how I can get good greyscale readings but have such a washed out picture?

Thanks



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D6500Ken



Joined: 12 May 2008
Posts: 10
Location: Indianapolis, IN

Posted: Tue Jul 17, 2012 3:28 pm    Post subject: Re: Calibrated LED TV too bright and washed out

daddycool wrote:
Hi,
Great dummys guide on calibration, if it wasn't for that I wouldn't even own a calibrator Smile

I spent a couple of hours calibrating my new TV last night, it's a Panasonic 42ET5B.
I'm using an i1d2 and colourHCFR, with the AVSHD709 test disc (windows).

This is what I did...
Turned all the extra settings off;
Set the picture modes to Cinema and Warm
Set the contrast on the 100% white to around 35ftL;
Set the brightness using basic reference test 1 (the image with the flashing black bars and reference black at 16 or 17);
Adjusted greyscale at 80 and 30 with white balance.

I ran the greyscale measure and my graphs were awful, despite most of the x and y readings being 0.313 and 0.329 +/- upto 0.003 (IRE 0-20% still a bit off).

So I adjusted the gamma in the tv menu from 2.2 to 1.8 and ran greyscale measurement again. The results according to the graphs were pretty good (the averages at least). I've attached the colourHCFR file.

But, the picture is very bright and washed out. I was in a dark room, so I'm wondering if just need to turn CATS on (I'm at work at the moment).

I'm sure it's the low gamma that's washing out- does that mean I have the wrong contrast or brightness set?

I'm a tiny bit confused on how I can get good greyscale readings but have such a washed out picture?

Thanks


You have two errors here.

The backlight control is used to set your desired light output. Contrast should ideally be set to display all bars out to the 255 level, but at least to 235 (video white) if the set clips above-white information.

Studio gamma is around 2.4 for CRT monitors and 2.2 for digital displays. The shallower 1.8 gamma will reduce perceived contrast, making the image appear washed out.

Good luck!

Ken Whitcomb

Calibrations Inc
Indianapolis, IN
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