View Full Version : Proper lens striping?


kj01
03-29-07, 03:40 PM
I've been attempting to correctly lens stripe my Panasonic rear-projection CRT for the longest while now... and in the end I decided to start from square one with the factory default: no striping at all. So now I can see what needs to be done. There seems to be green/blue coming from the left side, and red on the right side of the screen. This is reverse of how the three colors are situated inside the TV... (looking at the front of the TV, the colors go RGB from left to right -- makes sense) though I assume this is normal. What do I need to do to make a blank white screen one solid white rather than white with faint splotches of other colors? I've read the Keohi guide... but I was just seeing if there were some other ideas here.

kj01
04-02-07, 07:04 PM
Anyone?

ChrisWiggles
04-02-07, 10:56 PM
What do you mean by "faint splotches." Lens striping is used to counteract colorshifting from side to side which is going to be more or less uniform and progressively even from side to side. It is not at all splotchy. Splotches sound more like phosphor wear.

kj01
04-03-07, 12:21 AM
I guess splotchy was too vague of a word. I do indeed mean color shifting. I tried some trial-and-error lens striping... to some rather hideous results. Major blue on the left... major green in the center... major red on the right. Ugly, ugly, ugly. So I'm going to undo what I've done, and get some info on how to do it right. All I need to know is -- what does what? If I cover a bit of one color, what does it do to the overall picture? As I've said, I've just been doing it all trial-and-error... but I would like to know more precise instructions (than are given on the Keohi site). Like, "if there is x on the left/right side of the screen, cover y amount of the left/right side of the z." That's more complicated than what I mean... but you hopefully get the picture.

ltd76gold
04-03-07, 01:39 AM
I've done my own (panny) and a few others but never without the aid of measuring devices for helping the eyeball loss factor.

One thing for sure is that the tape used need not be wider than 1/2". I found that a strip of this tape placed on the red gun about 1/4 to 1/3 of the way in from the right side of the red gun (near the green gun side) helped remove some off center tinge.

Since you have been experimenting, you know how to apply the tape so it does not contact the lens surface.

This simple tweak, taught to me by Michael TLV did enhance white screen uniformity to a degree. Accurately setting up the grayscale did much more although.

Doug k