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Calibrate with Local Dimming On or Off?

12-28-2009, 10:30 AM
I am looking for some input from those that might have experience calibrating a local dimming television set.

I have a Toshiba 55SV670U LED Backlit LCD set with Local Dimming, which I am attempting to calibrate. I have the Enhanced Chroma 5 probe and Calman Home software.

Should calibration be done with Local Dimming (LD) enabled or disabled? I know the light output is reduced when LD is enabled.

Also Toshiba has a anti-blur technology called "Clearscan240" that inserts black frames in between normal frames. This also seems to reduce light output. Should this be disabled when Calibrating?

Thanks in advance.


12-28-2009, 11:17 AM
Local dimming should be enabled but all other features turned off. Leave them off after calibration as well.

12-29-2009, 06:21 PM
Check with Spectracal on the use of the C5 probe with LED Local Dimming displays.... Might need an update, I'm not positive although.

1. Take your time with the B/W level. Make sure that the environment is stable for critical viewing, some backlighting but very limited ambient. A very inexpensive "backlight" of about 5% total light output is just a 5 watt nightlight behind the display. If that's not an option, wall mounting or ??? do without.
2. If you are going to use the service controls for CT, check readings after leaving service. On the other hand, the advanced user controls will get you so darn close, the very slight possibility of improvement via service may be outweighed by the inherent calamities of experimenting in there.
3. Use of the CMS provided in ad/user will improve test pattern readings but the eyeballs might not really see much in the way of improvement. Do not worry 'bout it.

Nice display, stable and proficient. Good price too!

Doug k