Contrast and Burn-in - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 9 Old 11-05-2002, 01:48 PM - Thread Starter
Member
 
Shubster's Avatar
 
Join Date: Oct 2002
Location: St. Paul, MN
Posts: 25
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Alright, here's what I know: having the contrast set too high dramatically increases the risk of burn in on a CRT RPTV.

Now the question: how high is too high?

I have a mitsu 65909 and was wondering at what point does the contrast become dangerous. 50%, 40%? Is there any form of general rule, or does it vary from tv to tv?

Thanks.
Shubster is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 11-05-2002, 02:19 PM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,753
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 132
Greetings

It will happen even at low contrast settings, but it just takes much much longer.

Like how much mercury can I consume and not die right away ... :)

The consensus is still around 30% or a light output of 15 to 20 ft-l for RPTV's.

Regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #3 of 9 Old 11-06-2002, 07:18 AM
Member
 
sachse's Avatar
 
Join Date: Nov 2002
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Once you have burn in is there any way to correct it?
sachse is offline  
post #4 of 9 Old 11-06-2002, 07:20 AM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,753
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 132
Greetings

Yes ... replace the crt where the burn in ... aka ... uneven wear occurred.

Regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #5 of 9 Old 11-06-2002, 07:46 AM
Member
 
sachse's Avatar
 
Join Date: Nov 2002
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
What do you think the replacement should cost me?
sachse is offline  
post #6 of 9 Old 11-06-2002, 08:04 AM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,753
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 132
Greetings

Replacing three guns usually runs about $1000 to $1500.

Regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #7 of 9 Old 11-06-2002, 09:00 AM
Member
 
sachse's Avatar
 
Join Date: Nov 2002
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Thanks. Some have suggested that if you quit watching with the sides pulled in and only watch full screen the problem will eventually heal itself. What do you Think?
sachse is offline  
post #8 of 9 Old 11-06-2002, 10:46 AM
AVS Special Member
 
Michael TLV's Avatar
 
Join Date: Feb 2000
Location: THX/ISF Calibrationist/Instructor, Calgary, AB, Canada
Posts: 6,753
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 132
Greetings

It will lessen over time, but it will never completely go away.

Other methods to try ... reverse image at high contrast ... but may do more harm than good. (Never tried ... simply a theory people have postulated.)

Reduce the contrast and learn to watch everything in full or just modes.

Regards

Michael Chen @ The Laser Video Experience
ISF/THX/TLV Video Instructor
The Video Calibration Education Hub - www.TLVEXP.com

Michael TLV is offline  
post #9 of 9 Old 11-07-2002, 07:08 AM
AVS Addicted Member
 
Mfusick's Avatar
 
Join Date: Aug 2002
Location: Western MA
Posts: 22,383
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 142 Post(s)
Liked: 771
Quote:
Originally posted by Michael TLV
Greetings

Replacing three guns usually runs about $1000 to $1500.

Regards
OUCH!:(

-

"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."
Mfusick is offline  
Closed Thread Rear Projection Units

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off