15x view of pixel matrix - take a look! - AVS Forum
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post #1 of 6 Old 06-12-2014, 10:56 PM - Thread Starter
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15x view of pixel matrix - take a look!

I painstakingly used a 15x loupe to check the pixel pattern for both my old LN40B530 and my new UN46EH5000.

When I first got the new one (UN46EH5000, manufactured in March of this year), I could see that it was not up to the superb quality of the older LN40B530 (manufactured in 2008).

I cannot take photos of the magnified views, as I haven't figured out how to focus my camera (even in macro mode) tightly enough. But, I have created a likeness of the two pixel patterns using MSPAINT, as close to what my eyes could see using the 15x loupe.

The first photo (LEDpixelmap.bmp) is what the newer one (UN46EH5000) looks like - a simple square pixel map alternating between green, red, and blue, with black borders.

The second photo (LCDpixelmap.jpg) is what my excellent older LN40B530 looks like - a much more complex pattern of two different sizes of alternating "greater than" signs in the color sequence (green, red, and blue). This older pixel pattern may be why it looks so much better to the eye - there is much more in the way of pixels, size and slant, to better represent the image to be presented.

I wonder if Samsung, or *anyone* makes panels using this earlier, more complicated, and more eye pleasing method.

Please, if anyone on here at AVSFORUM knows anything about LCD panel design and manufacture, please advise in light of what my 15x loupe has revealed to me.

More to the point, where can I get a new panel made like the older LN40B530, with its complex pixel pattern map?
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post #2 of 6 Old 06-13-2014, 08:34 AM - Thread Starter
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The pixel map for the newer UN46EH5000 didn't get a thumbnail originally, so I uploaded
it again so there will be two thumbnails to see. The first thumbnail (above) is the
one for the older LN40B530, which has a diagonal pixel matrix, while the next thumbnail\
(below) is the one for the newer LED, which has a square pixel matrix.

Over 60 views and not one comment? Surely there is someone here who knows
something about LCD design - tell us what you know. Why would the older LCD
have alternating diagonal pixels, even with two sizes (smaller diagonals and larger ones),
and the newer LED only have the larger square matrix? Is this secret industry information?
I was sure hoping someone on this board could tell us what is behind these very different
pixel matrices.
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post #3 of 6 Old 06-13-2014, 08:36 AM - Thread Starter
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(having trouble getting the thumbnail uploaded)
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post #4 of 6 Old 06-14-2014, 02:26 PM
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I don't have much to add except my own pictures of a Samsung LNT4065, which has a similar pixel structure to your LN40B530. I think it's quite fascinating. It looks as though the subpixels themselves have subparts that turn off.

White


255 Red


255 Green


255 Blue


128 Red


128 Green


128 Blue

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post #5 of 6 Old 06-14-2014, 04:34 PM - Thread Starter
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Thanks for your photos, GTRagnarok. What camera (and magnifier) did you use to get those photos?

I notice that the sequence in yours is: Green, Blue, Red
where on my old LN40B530 it is: Green Red, Blue

I guess the sequence isn't important, but it is surely a point of curiosity.

I'm betting that your LNT4065 looks very much like my old LN40B530 - is it an excellent display? Right?

I was hoping somebody here at AVSFORUM would tell us what gives with these different pixel matrix design.

I like my new UN46EH5000, but I can tell that the old panel is superior and I would like to find a link
to where I could read about what goes on behind the scenes with LCD panel design. Could it be that
nobody makes this superior panel matrix anymore? What a shame.
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post #6 of 6 Old 06-14-2014, 04:40 PM
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I havent seen that panel in a few years on a new set. I have seen the generation before on some though (including a 75" Sammy 7100).

That's a S-PVA panel.

After that they moved to square blocks because the off angle viewing was different Left vs Right on those (and the previous generation). Sometimes you see the previous generation in a horizontal orientation on newer sets....which would put the off angle differences now directed upwards and downwards.

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