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Old 09-30-2007   #7
Join Date: Sep 2007
Location: Bettendorf, Iowa
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Default Re: Rear Projection at CEDIA - missing???

Originally Posted by JerryDelColliano View Post

At CEDIA the DLP booth a had a promo for their new Dark Chip 4 with 100,000:1 contrast.

The human eye can only see 1800:1.

This numbers game of all on and all off measurments needs to stop
i cant disagree about that the human eye not seeing 100,000:1 contrast ratio. I also have to agree with getting sick of all the faulty contrast ratios that are out there right now and how every company just jacks up ratios that are in conjuction between there modle numbers but not to the other brands tv to the right. there needs to be a strict standord when it comes to measuring contrast.
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Old 10-01-2007   #8
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Default Re: Rear Projection at CEDIA - missing???

Tough to expect standardization of specifications when their are no standards...

It seems everyone just makes a number larger than everyone elses then releases it! I know their is a push to 'standardize' subwoofer specifications but the system is inherently flawed, so now we'll have bogus standards that don't work, I don't know which is worse. In the face of 'standards' more people will believe the data, but when it's flawed, maybe that is worse than just out and out lying.
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Old 10-01-2007   #9
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Default Re: Rear Projection at CEDIA - missing???

Hi All,

Actually the human eye can only see 1200:1 in the dark. The other thing about Contrast Ratio is that the environment (read: The Room) is a huge variable that has a major impact on the real contrast ratio achieved. What you typically get in a movie theater is around 180:1 as a point of reference. If you design a home theater well, and calibrate the display properly you might acheive a Real World Contrast Ratio of 500 or 600:1, and that my friends is outstanding! The Contrast Ratio spec war is the industry's latest stupidity. In the late 1990s projector manufacturers were doing the same thing with light output in Lumens before the industry moved to ANSI lumens. Sam Runco called them Bull**** Lumens!
Kevin Miller
Phone: 718-274-0236
Email: kevin@ISFTV.COM
Web Site: www.ISFTV.COM ;
Founding Imaging Science Foundation Member since 1994. Industry Consultant ~ ISF Instructor
Contributing Editor to CNET.COM, &
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