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Found this article on ars technica about the Nexus One screen:
http://arstechnica.com/gadgets/news...exus-ones-screen-science-color-and-hacks.ars/
In this article, I'll explore the issue of the Nexus One's screen resolution in some detail. I'll also talk a bit about the science behind how the screen works, and I'll show you some cool image hacks that let you turn greyscale images into color, just by using pinch-and-zoom in the Nexus One's gallery application.
Note: We offered a Google a chance to comment on the issues raised in this article, but we received no reply as of press time.
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A very interesting article. Ars is a cut above the rest when it comes to in depth discussion.
Thanks for the link.
Good read. I had a very hard time with small text when I first got the N1, and with a Droid side-by-side with my N1, a had people who could not see the artifacting that I was seeing. At least I know I wasn't going ape****, and now I have an explanation. Oddly, I don't mind these things about the screen now.
Great article, thanks for sharing.
Excellent article, thx for sharing this. While it was a bit beyond my scope of expertise, I do nonetheless appreciate an in-depth analysis.
I have no idea what they're saying. oO
Anyone want to provide the cliff's notes' version?
They're saying that the use of the PenTile matrix for the display means that text on the N1 is less sharp/crisp than text on non-PenTile displays such as the Droid, and that the effective resolution is actually much smaller (392x653) than the advertised 800x480 due to the fact that the read and blue blocks are twice the width of green.
danguyf said:
They're saying that the use of the PenTile matrix for the display means that text on the N1 is less sharp/crisp than text on non-PenTile displays such as the Droid, and that the effective resolution is actually much smaller (392x653) than the advertised 800x480 due to the fact that the read and blue blocks are twice the width of green.
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So this has no effect on anything but text then?
Paul22000 said:
I have no idea what they're saying. oO
Anyone want to provide the cliff's notes' version?
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There is another thread somewhere on N1 forum which has a better explanation.
Anyways... here are my notes and some extra stuff that will help you understand things better []
This article is about AMOLED screen in general. Author uses N1 for reference as it is the first mainstream phone to use this screen.
In traditional screen language, a pixel is a small square with three colors. Red Green Blue (RGB). In AMOLED, we have three independent LEDs each of different colors grouped together to create these colors.
Now traditionally, one would think that AMOLED will have RGB LED combinations and we can call them pixels... this would have made AMOLED as perfect replacements for traditional LCDs.
When LCDs were introduced... people realized that fonts look bad as LCDs are pixel blocks and create jagged looking fonts. Companies like MS devoted years of research to comeup with truetype/cleartype fonts so that LCDs can display smooth fonts.
However, AMOLED uses RGBG format. R and B are twice the thickness of green. So better way to write them is "RRGBBG" where each R,G,B are of same width. This is for LED life reasons. Thus, your pixel, in traditional sense (RGB together) will be approximately twice the width.
Thus all the font display technologies that works on LCD doesn't work anymore. and fonts look bad on AMOLED.
Now, when I was watching windows 7 presentations... MS has developed new font rendering schemes for AMOLEDs. They showed some results and you can zoom in continuously without seeing jaggedness of fonts.
Thus, this is not an screen issue... AMOLED is a new technology... people haven't figured out everything yet. having said that... AMOLED has way too many advantages over LCD and therefore.. most new devices are adopting it. Soon we should see a solution.
BTW.. i am a mechanical engineer.. so I might have used some wrong technical terms.... I might be wrong as well. []
arkavat said:
However, AMOLED uses RGBG format. R and B are twice the thickness of green. So better way to write them is "RRGBBG" where each R,G,B are of same width. This is for LED life reasons. Thus, your pixel, in traditional sense (RGB together) will be approximately twice the width.
Thus all the font display technologies that works on LCD doesn't work anymore. and fonts look bad on AMOLED.
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Lost me here. I don't see the connection between the two paragraphs... Let's see...
So you're saying that text looks bad on AMOLED screens because Microsoft technologies don't work on them, correct?
If so, what does Microsoft have to do with Android phones? How would their technologies get into Android in the first place?
And does that mean that Google just has to release new font "smoothing" in Android 2.2 and all issues will go away?
Paul22000 said:
Lost me here. I don't see the connection between the two paragraphs... Let's see...
So you're saying that text looks bad on AMOLED screens because Microsoft technologies don't work on them, correct?
If so, what does Microsoft have to do with Android phones? How would their technologies get into Android in the first place?
And does that mean that Google just has to release new font "smoothing" in Android 2.2 and all issues will go away?
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oh.. no... Microsoft cleartype font is just an example.... there are other things available... it think truetype is by apple... then there is opentype (opensource) etc...
Google should be able to solve it by using different rendering algorithms.
Again... just for the sake of example... Micorosft has developed a new sub-pixel redndering to handle AMOLED on Windows Phone 7. http://www.flickr.com/photos/marypcb/4362590066/
So yes.. it is possible.
Ah I see.
So just to make it clear, the entire Ars Technica article can be solved with software, correct?
Paul22000 said:
Ah I see.
So just to make it clear, the entire Ars Technica article can be solved with software, correct?
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yes... but it is not so easy. The pixel structure in AMOLED is quite different than LCD. Sub-pixel rendering technologies need to be optimized for this pixel structure.
arkavat said:
There is another thread somewhere on N1 forum which has a better explanation.
Anyways... here are my notes and some extra stuff that will help you understand things better []
This article is about AMOLED screen in general. Author uses N1 for reference as it is the first mainstream phone to use this screen.
In traditional screen language, a pixel is a small square with three colors. Red Green Blue (RGB). In AMOLED, we have three independent LEDs each of different colors grouped together to create these colors.
Now traditionally, one would think that AMOLED will have RGB LED combinations and we can call them pixels... this would have made AMOLED as perfect replacements for traditional LCDs.
When LCDs were introduced... people realized that fonts look bad as LCDs are pixel blocks and create jagged looking fonts. Companies like MS devoted years of research to comeup with truetype/cleartype fonts so that LCDs can display smooth fonts.
However, AMOLED uses RGBG format. R and B are twice the thickness of green. So better way to write them is "RRGBBG" where each R,G,B are of same width. This is for LED life reasons. Thus, your pixel, in traditional sense (RGB together) will be approximately twice the width.
Thus all the font display technologies that works on LCD doesn't work anymore. and fonts look bad on AMOLED.
Now, when I was watching windows 7 presentations... MS has developed new font rendering schemes for AMOLEDs. They showed some results and you can zoom in continuously without seeing jaggedness of fonts.
Thus, this is not an screen issue... AMOLED is a new technology... people haven't figured out everything yet. having said that... AMOLED has way too many advantages over LCD and therefore.. most new devices are adopting it. Soon we should see a solution.
BTW.. i am a mechanical engineer.. so I might have used some wrong technical terms.... I might be wrong as well. []
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good stuff thanks
Since the Pentile matrix pattern does a sort of hardware based antialiasing, is there a way to turn off the sub pixel rendering engine in Andriod? Since it would be redundant.
I've read on several sites about this phone and i'm planning to buy one but the problem is i'm confused whether this device is pumped up with a LCD, TFT capacitive or AMOLED screen? now some websites state that it has AMOLED tft capacitive screen. I would like to have some clarification about this. and some feedback would be appreciative about this device...
The first stock had AMOLED screens, now they are produced with TFT's you may be able to find an AMOLED one via ebay etc.
Many people will say there isn't much difference anyway.
Well actually, there's a huge difference..see for yourself !
Zte Blade tft vs AMOLED
shad0wboss said:
Well actually, there's a huge difference..see for yourself !
Zte Blade tft vs AMOLED
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Yes it's brighter etc but also the con being screen burn!
Anyway you will have to buy second hand or old stock for AMOLED
Glad baught mine when first came out...
It's actually quite easy to find out if your Blade has the AMOLED or TFT screen.
Go to settings> About phone> Build number
If it ends in 05, it's an AMOLED. If it ends in 08, you've got yourself a LCD. (This is only true for grey devices.)
After I've changed my HD2 screen for about 1 week. (because the touchscreen is broken) I found that the color is change (not be the same as the old one).
Is it possible to calibrate screen color on HD2?
Thank advance
patta1982 said:
After I've changed my HD2 screen for about 1 week. (because the touchscreen is broken) I found that the color is change (not be the same as the old one).
Is it possible to calibrate screen color on HD2?
Thank advance
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No, as far as I know...
Some details about what's wrong with your colours?
bib*oops said:
No, as far as I know...
Some details about what's wrong with your colours?
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The white balance (too much green color). I think it's look like samsung galaxy.
BTW, After i try to search, i found this thread. Calibration profile for Nexus One v5.1
http://forum.xda-developers.com/showthread.php?p=23492991#post23492991
but it's not work for HD2
Anyone suggestion
i think your repair center use a non-original Chinese lcd screen for you.
try to change it with original one
satinfo50 said:
i think your repair center use a non-original Chinese lcd screen for you.
try to change it with original one
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Theoretically it's possible, if you changed LCD too.
If LCD done done too, sounds like it was either a cheap one or faulty. Is viewing angle also very poor!. Had trouble with all LCDs I have ever purchased here in Thailand as most supply sources get the cheapest rubbish from China possible & lie with claims of original part to top quality grade replacement. Buy all my parts out of Thailand cheaper & with better quality ...
Just wondering. When the screen is off, why is it as black as the bezel around it, same on my One S, but on my Galaxy tablet and some other phones, it's grey and you can clearly see where the screen is?
I thought maybe the glass is darker, but wouldn't this screw up the contrast/colours of the screen? Or maybe the material doesn't reflect light as much, but what material is this?
It's the screen. Amoled's backlight is from the pixel itself and doesn't need any source for backlight. It's those backlights on non Amoled screens that make black look grey.
Edit...
Misread what you asked. Thought you meant when the screen is on displaying black.
Sent from my SAMSUNG-SGH-I337 using XDA Premium HD app
bigblue95z said:
It's the screen. Amoled's backlight is from the pixel itself and doesn't need any source for backlight. It's those backlights on non Amoled screens that make black look grey.
Edit...
Misread what you asked. Thought you meant when the screen is on displaying black.
Sent from my SAMSUNG-SGH-I337 using XDA Premium HD app
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You're pretty much right. Its the sheet of plastic that they use in the screen. It all depends on what type they use. It varies from screen to screen. Samsung uses AMOLED screens so they use a different type of backlight. Samsung tablets use PLS though, which is like their version of IPS. They use a lighter backlight so it looks different. I personally don't like PLS screens or bad IPS screens (like this phone). The off viewing angles are pathetic. Good IPS screens like on the Lenovo Yoga or the HTC One are great, but otherwise I prefer normal LCD. Just my opinion
aooga said:
You're pretty much right. Its the sheet of plastic that they use in the screen. It all depends on what type they use. It varies from screen to screen. Samsung uses AMOLED screens so they use a different type of backlight. Samsung tablets use PLS though, which is like their version of IPS. They use a lighter backlight so it looks different. I personally don't like PLS screens or bad IPS screens (like this phone). The off viewing angles are pathetic. Good IPS screens like on the Lenovo Yoga or the HTC One are great, but otherwise I prefer normal LCD. Just my opinion
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Even cheap IPS destroys a TN panel..
I personally love IPS screens best.
-Sent from Marino's Maxx-
I thought it was because of this?
I Am Marino said:
I personally love IPS screens best.
-Sent from Marino's Maxx-
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Yeah but the viewing angles (in my experience) are bad if its not a high quality panel. I find the veiwing angles of this phone terrible and there's no denying it. Compared to the htc one, its horrible. I'm not trying to start a fight here, i know this phone is $300 cheaper than the htc one, but still, I prefer wide veiwng angles.
Actually my only gripe about the Nexus 4 aesthetically is that it's NOT as black as the bezel when it's off.. Sometimes it's grayish, sometimes it's actually darker (depends on the lighting). the Gnex was uniformly black when it was off (which is the one thing I loved about the design), while outdoors I can easily see the "gray" of the N4's bezel (screen if you're indoors) when the screen is off. Wish it was all black, looks much better that way.
The LCD itself is an important part of why it looks like it does, but the more important factor is that the LCD is optically bonded to the touch surface, leaving no space for light reflections, air, etc. between the touch surface and the LCD itself. In LCDs that are not so bonded you see light reflecting off the touch surface, but also light that passes through the touch surface and reflects back off the LCD surface. In an optically bonded display assembly much less light reflects off the LCD surface because they put glue or a similar substance between the touch surface and LCD so there's no air between them.
From memory it is the polarizing filter/layer(s) that dictate how dark the panel is when it is off.
aooga said:
You're pretty much right. Its the sheet of plastic that they use in the screen. It all depends on what type they use. It varies from screen to screen. Samsung uses AMOLED screens so they use a different type of backlight. Samsung tablets use PLS though, which is like their version of IPS. They use a lighter backlight so it looks different. I personally don't like PLS screens or bad IPS screens (like this phone). The off viewing angles are pathetic. Good IPS screens like on the Lenovo Yoga or the HTC One are great, but otherwise I prefer normal LCD. Just my opinion
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AMOLED doesn't use any backlight. IPS/PLS/TN/PVA/etc. all use either CCFL or LED for backlighting, the brightness/dimness of the light source effect brightness when the display is on but not when it is off.
threeclaws said:
From memory it is the polarizing filter/layer(s) that dictate how dark the panel is when it is off.
AMOLED doesn't use any backlight. IPS/PLS/TN/PVA/etc. all use either CCFL or LED for backlighting, the brightness/dimness of the light source effect brightness when the display is on but not when it is off.
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I know...I said PLS screens use a backlight, thats why they look different.
aooga said:
I know...I said PLS screens use a backlight, thats why they look different.
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You said AMOLED uses a different kind of backlight, AMOLED uses no backlight so no you didn't know; and no the type of backlight isn't why they look different when the screen is off.
Hi guys
I have a used V20 but the colors of the icons etc are quite dull compared to my wifes V20 and also the whites are more yellowish when compaing side by side. Which part of the phone affects/determines the LCD colors? Is it the digitizer itself or does it have to do with the mainboard producing the colors?
Thx!!
markmessier8888 said:
Hi guys
I have a used V20 but the colors of the icons etc are quite dull compared to my wifes V20 and also the whites are more yellowish when compaing side by side. Which part of the phone affects/determines the LCD colors? Is it the digitizer itself or does it have to do with the mainboard producing the colors?
Thx!!
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May be comfort view is turned on? It's intended to yellow the screen.
nkirk said:
May be comfort view is turned on? It's intended to yellow the screen.
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No its off and i played around with the Vision color setting but it doesnt really help. Id like to order replacement part but i want to make sure that I order the correct part that is associated with the colors of the screen?
Thx
Activate the high contrar mode either with the high contrast theme or the option(i dont remember where it is in the settings)
Sorry for the double comment
nkirk said:
May be comfort view is turned on? It's intended to yellow the screen.
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XsaucerX said:
Activate the high contrar mode either with the high contrast theme or the option(i dont remember where it is in the settings)
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Yes i have it turned on. Screen colors are still quite poor compared to my other V20. Colors seem faded a bit.
Im thinking maybe its due to age or wear. But our phones arent THAT old.