Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Solid State CRT Televisions

Notices

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #12  
Old 01-14-2015, 08:42 PM
Dave A's Avatar
Dave A Dave A is offline
VideoKarma Member
 
Join Date: Aug 2003
Location: SE Pennsylvania
Posts: 1,567
A few observations and questions...and thanks for the input from all with a few photos added tonight to hopefully help me figure this out.

Jr...The first is that the LCD shutters are variable in chroma density on this set depending on the user menu chroma setting. Not fixed color filters like a DLP or a Col-R-Tel. When I got this and the manual, I found the RGB shutter gains...on the side of the body...and did a by-eye setup to BW with the chroma down. It is as close as it gets to BW by my aging eyes. The camera white balance is a bit off. BW here. The shutters look clear at this point and it shows the finest scan lines I have ever seen. I can shine a flashlight through the front and easily see the CRT. 100% transmission to me in BW. The addition of color will change that to the users degree of chroma gain.

I added a "blue check" menu button photo from the front button selection. "Blue check" is an old, cheap way to set bars on a color monitor without a scope. This should also represent a frame/field of the blue processing and does show the luminance values in the blue space for it's moment in RGB color. R and G should be the same and sequentially add to balanced color in the scan at that moment. And your persistence of vision kicks in at this point.

etype...you mention two filters and the block shows one eprom going to two buffers before the LCD shutter. Is this not RGB or am I missing something? The video buffer shows two dram. Is this some kind of color +/- thing going on? Help me with the two shutter concept.

And help me more with the scan/field rate. I think I am close but a blow-by-blow of a frame in RGB/LCD processing would help.

Gotta go now so I can watch the 1960 Peter Pan in JVC field-sequential color. I am seeing colors I have never seen before.
Attached Images
File Type: jpg DSC02397.jpg (53.6 KB, 33 views)
File Type: jpg DSC02395.jpg (34.8 KB, 33 views)
File Type: jpg DSC02394.jpg (52.8 KB, 41 views)
File Type: jpg DSC02399.jpg (43.1 KB, 30 views)
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
Reply With Quote
 



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

Forum Jump


All times are GMT -5. The time now is 06:36 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.