I've noticed that the viewing angles and visibility in sunlight of Samsung's Super AMOLED+ displays are below average, contrary to the company's claims.
I know for a fact that reflections in any touchscreen display can be eliminated by bonding the glass to the LCD panel using a transparent resin. As there are less layers of reflective surface redirecting the light rays (from sunlight and the display itself), visibility can be increased dramatically.
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(yeah, it's a great diagram isn't it?)
I disassembled an old Nokia X6 I had about a year ago and bonded the glass to the TFT LCD panel using high transparency superglue. When indoors it may seem to be about the same, but there is a big difference when outdoors. The Nokia X6 has surprisingly far better visibility in sunlight than the Samsung Galaxy S2.
When seen from nearly in-line with the glass, you can see quite a difference.
Some bonus photos from a while back when the screen wasn't cracked
Here's a video (it's in 1080p):
Imagine the possibilities if done to a Super AMOLED+ display like the Galaxy SII's.
Some questions:
Is there anyone here (on XDA) willing to do it?
Why hasn't Samsung already done so already?
Ah, back in the early days of SAMOLED displays with poor sunlight visibility...
Tough to really see a difference in those photos. I'm curious about the long term effects of this like yellowing and glue coming undone. Also, this adds a lot of unnecessary complexity to manufacturing process. Imagine if some bubbles got trapped in there. Anyone who's ever put a screen protector on a phone knows how annoying that can be.
It's not that hard
ben999_ said:
Tough to really see a difference in those photos. I'm curious about the long term effects of this like yellowing and glue coming undone. Also, this adds a lot of unnecessary complexity to manufacturing process. Imagine if some bubbles got trapped in there. Anyone who's ever put a screen protector on a phone knows how annoying that can be.
Click to expand...
Click to collapse
As of now, there aren't any signs of yellowing or glue becoming undone. In fact, the glass now survives a 1.5 meter drop. For the record, the glue only has bubbles around the side because I didn't seal the edges of the LCD panel.
Also, I did a bit of research. The iPhone 4 and 4S has already done this on a mass production scale, but with IPS displays. I don't think it would be much harder for Samsung to do as they manufacture their own displays anyway.
I'll post better pictures tomorrow.
ACTUALLY, as you can see in my last photo, barely any light is visible from the Galaxy SII's display at that angle. You may be able to see it on an AMOLED display but not on a mediocre contrast LCD display (I can't even see the Galaxy SII's display on my LCD monitor).
ben999_ said:
'm curious about the long term effects of this like yellowing and glue coming undone. Also, this adds a lot of unnecessary complexity to manufacturing process. Imagine if some bubbles got trapped in there. Anyone who's ever put a screen protector on a phone knows how annoying that can be.
Click to expand...
Click to collapse
Consider the fact that Superglue was invented for the purpose of gluing camera lenses together (in part, to eliminate reflections). The optical industry covered all of your concerns decades ago.
Pretty much, although they'd call it something else like bonding resin.
Sent from my GT-I9100 using XDA App
What case are you using? It's awesome!!
nikidorian said:
What case are you using? It's awesome!!
Click to expand...
Click to collapse
http://forum.xda-developers.com/showpost.php?p=22436462&postcount=24
It is called 'Sweet Armor GS2'. I also have an aluminium battery cover on it.
Sent from my GT-I9100 using XDA App
But i think there are already solutions for it atleast Chinese have it. Dont u heared of antiglare screen gaurds? Which is not so transperent( its darker) but u will never notice its presence over the screen. Which is also not that much smooth.
It can improve reading in sunlight and also is fingerprint and scratch resistant. But is costlier than normal gaurds. Its about 20$ .
Sent from my HTC HD2 using xda premium
ben999_ said:
Tough to really see a difference in those photos. I'm curious about the long term effects of this like yellowing and glue coming undone. Also, this adds a lot of unnecessary complexity to manufacturing process. Imagine if some bubbles got trapped in there. Anyone who's ever put a screen protector on a phone knows how annoying that can be.
Click to expand...
Click to collapse
If they use a colourless resin it stands a better chance of not yellowing and won't come undone. The biggest issue I see is bubbles. Resins are notorious for them as they are more syrup-like that glue. If the manage to get that thing on there though, they will never be able to get it off. Kiss the chance of replacing a digitizer goodbye.
I'd rather leave it to Samsung/hardware developers to find a solution. You're talking about a potentially dangerous, warranty voiding procedure to replace using your hand to cast a shadow.
vantt1 said:
As of now, there aren't any signs of yellowing or glue becoming undone. In fact, the glass now survives a 1.5 meter drop. For the record, the glue only has bubbles around the side because I didn't seal the edges of the LCD panel.
Also, I did a bit of research. The iPhone 4 and 4S has already done this on a mass production scale, but with IPS displays. I don't think it would be much harder for Samsung to do as they manufacture their own displays anyway.
I'll post better pictures tomorrow.
Click to expand...
Click to collapse
The one thing about the iPhone 4 is that there is still a gap layer between teh digitizer and the lcd. I have replaced many iPhone 4 digitizers in my time. That being said, there is an air gap there which will cause diffraction. In order todo this problem, the resin needs to be appied to the digitizer so it will be combined to the LCD.
showlyshah said:
But i think there are already solutions for it atleast Chinese have it. Dont u heared of antiglare screen gaurds? Which is not so transperent( its darker) but u will never notice its presence over the screen. Which is also not that much smooth.
It can improve reading in sunlight and also is fingerprint and scratch resistant. But is costlier than normal gaurds. Its about 20$ .
Sent from my HTC HD2 using xda premium
Click to expand...
Click to collapse
I know of anti glare screen protectors. In fact, I know them too well. Their light diffusing properties make an otherwise sharp display look fuzzy. Pixels are no longer in line with each other but instead appear to look scattered. The thing with anti glare screen protectors is that they prevent external reflections from travelling in a straight line, thereby reducing glare.
My aim here is that I want to reduce the reflections altogether, not spread them out.
Also, I am curious as to how you can pay $20 for a single screen protector. I always buy them from eBay because you can get at least 30 for the price of $20.
Some better photos
ben999_ said:
Tough to really see a difference in those photos. I'm curious about the long term effects of this like yellowing and glue coming undone. Also, this adds a lot of unnecessary complexity to manufacturing process. Imagine if some bubbles got trapped in there. Anyone who's ever put a screen protector on a phone knows how annoying that can be.
Click to expand...
Click to collapse
Here are some better photos. Sorry for the shakiness though.
To make a good comparison, I have a screenshot of the Nokia X6 on the Galaxy SII. Both displays are at full brightness but my camera decided to take the light metering value from the Galaxy SII so the Nokia X6 looks dimmer.
This is the Nokia X6's display viewed from around 85 degrees from where 0 degrees is perpendicular to the display (if that made sense). Look for the red Opera icon.
And this is the Galaxy SII's display from around the same angle. Also look for the red Opera icon.
As others mentioned, what are you supposed to do if the digitizer fails? There's a reason the screen isn't actually bonded.
O rly?
MissionImprobable said:
As others mentioned, what are you supposed to do if the digitizer fails? There's a reason the screen isn't actually bonded.
Click to expand...
Click to collapse
If the digitizer fails, you'll have to replace both the digitizer and the display panel.
It's not uncommon now; the Galaxy SII's display assembly is already a single piece, not separable into its individual parts without damaging the panel. The two parts were made to be a single assembly at the factory. Besides, they aren't expensive. The combined cost of a Nokia X6's digitizer and LCD doesn't exceed $50. If you want to replace a cracked Galaxy SII digitizer or faulty AMOLED panel, you'll have to buy the whole assembly anyway.
A genuine Samsung panel costs $180, but for reasons that shall remain unexplained, it is possible to buy third party Galaxy SII digitizers on the internet for around $10. I don't know how that's going to work. Maybe the stock digitizer and LCD panel can be separated into two separate pieces so if only the glass cracks you can replace the digitizer.
EDIT: I checked. The Galaxy SII's glass and the LCD panel are fused together using some glue which looks to be inseparable. This was supposedly meant to prevent dust from getting in. It's a reasonable excuse.
Oh yeah, as seen in the pictures I posted, the Nokia X6's digitizer is badly cracked but is still fully functional. I cracked the screen once before but to a much lesser extent, but the digitizer failed anyway.
As you can see, the display assemply can be separated.
It wasn't cracked that badly, but it didn't work.
Is there any easy way to spread out the super glue? This sounds like a great idea but superglue can be a huge PITA to work with, especially with something expensive.
xHausx said:
Is there any easy way to spread out the super glue? This sounds like a great idea but superglue can be a huge PITA to work with, especially with something expensive.
Click to expand...
Click to collapse
I used around a full bottle of Aron Alpha Instant Glue (the Alpha Cyanoacrylate one) for the Nokia X6's screen, and it's quite alright as long as there isn't any dust on the glass or the LCD. If bubbles form as you're applying the glue, just pop them with a needle. The glue is quite runny, so when applied to the glass on a flat surface it should just spread out evenly.
Unfortunately, one thing that I didn't do was have a rectangular foam border for the LCD to sit on so that the glue doesn't escape from underneath the LCD panel form bubbles after the LCD is placed on top of the glass.
Since there is no direct contact of surfaces for the glue to actually bond (and you're using a full 2 grams of it), drying takes a lot longer. I recommend letting it dry for a full 24 hours before moving it.
This is the closest I could find to the one that I used.
Mine came in an orange plastic bottle which looks exactly like this
vantt1 said:
Oh yeah, as seen in the pictures I posted, the Nokia X6's digitizer is badly cracked but is still fully functional.
Click to expand...
Click to collapse
Beware of using cracked screens without protecting your fingers with a screen protector (even packing tape works well in a pinch) You do NOT want to slice your fingertips with the ultra sharp edges on a cracked screen.
vantt1 said:
If the digitizer fails, you'll have to replace both the digitizer and the display panel.
It's not uncommon now; the Galaxy SII's display assembly is already a single piece, not separable into its individual parts without damaging the panel. The two parts were made to be a single assembly at the factory. Besides, they aren't expensive. The combined cost of a Nokia X6's digitizer and LCD doesn't exceed $50. If you want to replace a cracked Galaxy SII digitizer or faulty AMOLED panel, you'll have to buy the whole assembly anyway.
A genuine Samsung panel costs $180, but for reasons that shall remain unexplained, it is possible to buy third party Galaxy SII digitizers on the internet for around $10. I don't know how that's going to work. Maybe the stock digitizer and LCD panel can be separated into two separate pieces so if only the glass cracks you can replace the digitizer.
EDIT: I checked. The Galaxy SII's glass and the LCD panel are fused together using some glue which looks to be inseparable. This was supposedly meant to prevent dust from getting in. It's a reasonable excuse.
Click to expand...
Click to collapse
I can say for a fact and from experience that these "combined" or "bonded" screens come apart. I am not sure what they use but I highly doubt it's super glue. And if they are sealed together, I am assuming it's just an edge seal or else it would do what you are saying right?
I don't know how to explain this. The corner of the screen is somehow 'broken'. I am not familiar with the construction of such an LCD display. I thought it was the screen protector....but it isn't, I can see by pressing with the finger that it is BELOW the surface, and it is not a bubble of the screen protector. Also the nexus 7 surface is one single surface, and there would be no reason why the screen protector would lift exactly in that point. It has something to do with the real display, below the glass surface. See photos.
The colours are displayed correctly. Also the problem is not visible on high brightness or lighter colours. But i simply hate it not having everything in the right shape, as much as i hate dead pixels (I luckily haven't for the moment).
Would this be a good reason to have it replaced by warranty?
The device comes from 'Mediaworld' which is a chain in europe (or mediamarkt, in germany). Would I have to remove ROOT before I go and ask?
The flexible and curved screen technologies came out a few years ago, but there wasn't much practical use for them. These were solutions waiting for problems. That's cool. Even the giant curved screen TVs that came out since then seem to be useful only if you plan on viewing the TV from a four meter distance. That makes sense.
But the Galaxy Edge screen? "Uhhhhhh, okay, it's cute, but can we move along now?"
People seem to love their Galaxy Edge screens, but I honestly don't get it -- at all! I'm definitely a function-over-form kind of guy, and so I don't want the edges of my screen wraping around the sides of the device and facing away from me. Because this is less than optimal design, it actually looks ugly to me. So, it seems it's only function is to be a gimmick to sell more product to people who are more form-over-function than function-over-form.
This is my opinion, and other opinions may differ.
So now that Samsung is not offering their new Galaxy devices without the Edge wrap-around screens, I won't be buying them until they bring back the flat screens.
Are there some other practical uses for the screen wrapping around half of the device's side? And are these uses worth the trade off of sacrificing pixels that face you when viewing your screen normally?
If Samsung really must continue the gimmick I hope they get wise and bring back totally flat screen as a Galaxy product option.
That's my feelings, but what do others think about curved edges vs flat?
Really don't like curved edges either, I think it looks nice but functionally I'd just prefer flat. Also makes cases weird as they have to cut around the curved sides.
Gimmick I personally HATE curved displays. You can't fully protect it with tempered glass. There are curved ones but those have glue only on the edges not whole panel. It also gives ugly light reflexes. I believe that was designed to eliminate decent screen protection and make devices less shatter proof. I hope there will be flat Galaxy S9 if not i will probably (sadly) abandon samsung. 2,5D is a BS also
gimmick, i hate it. hard to protect with case, makes replacement screen more expensive too