Samsung Galaxy S IV might come with 'Green PHOLED' screen tech, but what is it?

The latest rumor about the Galaxy S IV is that Samsung might have used a new screen technology for the Full HD OLED panel on the phone, called Green PHOLED. We've been tipped that would indeed be the case, too, and the new technology offers about 25% better energy efficiency than the older one, which we've heard before about the S IV screen.

We hope someone is not confusing FOLED, which marks an OLED screen with a flexible plastic substrate, like Samsung's YOUM brand, and PHOLED, which stands for phosphorescent organic light-emitting diodes, but let's assume it's the latter, as we've been hearing about Samsung experimenting with hybrid production methods for the different diode colors for a while now.

Phosphorescent diodes have the advantage to be up to four times more power-efficient than fluorescent ones, the type that Samsung has mostly been using so far, where the "Green" moniker of the technology might stem from. The problem, however, is that green and red PHOLEDs last magnitudes longer than blue ones, as you can see in the table below, and you need all of those to make a pretty picture that won't start deteriorating over time when the blue PHOLEDs start giving up the ghost.


That is why the reporting is that Samsung used the good old fluorescent material for the blue diodes, but decked up the rest with power-efficient PHOLED tech, thus ensuring consistent color quality, but overall lower power consumption by about a third or a fourth, depending on which speculation is to be believed. Given that the screen on our smartphones consumes the bulk of its battery charge, this would result in the Galaxy S IV lasting longer, too.

The Green PHOLED rumor actually ties up with the OLED Association observations last year that Samsung has developed technology to combine production methods for its AMOLED displays, using the costlier but easily scalable Fine Metal Mask method for fluorescent blue diodes, and the more advanced LITI for the green and red ones.

We probably have something similar in store for the Galaxy S IV, and Samsung is reported to adopt a new, diamond-shaped pixel matrix to achieve the rumored Full HD resolution. The company is no stranger to the PHOLED technology either - let's not forget that it entered in a licensing agreement with the PHOLED inventors from Universal Display back in 2011, which runs until 2018, letting them produce and sell devices with phosphorescent diodes.

In a nutshell, the Full HD AMOLED display on the Galaxy S IV should be an exceptional OLED panel with the highest pixel density, brightness and power-saving levels Samsung has ever produced, and if that indeed translates to much longer battery life, the company could have a winner with the screen tech of the phone alone. Check out this purported video of the phone to have an idea what the luminant PHOLED display might look like.

Related phones

Galaxy S4
  • Display 5.0" 1080 x 1920 pixels
  • Camera 13 MP / 2 MP front
  • Processor Qualcomm Snapdragon 600, Quad-core, 1900 MHz
  • Storage 64 GB + microSDXC
  • Battery 2600 mAh(17h 3G talk time)

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51 Comments

1. _Bone_

Posts: 2155; Member since: Oct 29, 2012

Having never owned an AMOLED screen... is the problematic blue sub-pixel an issue in terms of a couple of them dying over a year or three?

3. PapaSmurf

Posts: 10457; Member since: May 14, 2012

You've never owned a AMOLED screen? Whaaaa.... From my past experience, no. I've been using my GS3 the day it came out. I'm never going back to LCD.

11. amansingal14

Posts: 309; Member since: Sep 08, 2012

This time it might die, according to the table, at 95%, the light blue life is just 700 hrs...

13. linneti15

Posts: 49; Member since: Sep 26, 2012

I've got a galaxy nexus and my mum has a galaxy s2, and they are starting to turn warmer in colour like a redish tinge whereas when we got them they had a blue-ish tinge... the blue sub-pixels are dying i'm afriad. You defiantly notice it after around 1.5 years.

46. haroonazeem638

Posts: 141; Member since: Mar 29, 2011

I second that. It started happening to my phone after 1 year. As much as I love the super amoled screen and their deep blacks and viewing angles, I hated how the colors were so different. My friend got a new SGSII a year after me and the difference was too much to not notice. I was disappointed because a $600 phone should at least last 1-2 years without hardware issues like these. But now I have the Nexus 4, and I miss the deep blacks and amazing viewing angles

16. ReaperChief

Posts: 31; Member since: Dec 21, 2012

The pixels might die, but the contrast and the deep blacks are PHenomenal..

50. danny_a2005

Posts: 362; Member since: Oct 06, 2011

htc one x is the best screen ive ever seen... And Ive had the note 2.. Im not a fanboy, Im just saying the truth..

20. EXkurogane

Posts: 863; Member since: Mar 07, 2013

AMOLED is a love-hate to me, both. I love the deep blacks, but i dislike the oversaturated colors. But to me i rarely feel much difference - im using 2 phones, one with AMOLED and one with LCD, the only thing noticeable is the degree of the blacks like i mentioned under normal circumstances, and only noticeable when u crank up the brightness, or you are using the phone in a dark room. It also depends what kind of LCD as well, HTC's Super LCD on the One X ( i didnt mention the Butterfly, to be fair since im comparing 720p screens) and the one on the Lumia 920 is pretty good.

43. buccob

Posts: 2968; Member since: Jun 19, 2012

I agree... I had the Galaxy S3 and then was stolen, but I save for a Sony Xperia Acro S phone... The screen of last year Sony's might not be as good as the one on HTC, but it is definitely awesome for pictures and video with bravia engine turned on... I compared to a friend's S3 side by side and the difference was not much... Of course blacks were great on AMOLED, but colors were both vibrant, and the Sony seemed more realistic without looking pale...

32. SleepingOz unregistered

Never experienced any blue dead sub-pixel or burn-in whatsoever since I'm using OLED based screens(N8, GSII, GNOTE II). But I upgrade every 8-12months so idk.

2. PapaSmurf

Posts: 10457; Member since: May 14, 2012

John Ive talking in the background lol.

4. XPERIA-KNIGHT unregistered

Looks sooooooooooo cheap! Its not even funny how garbage they are.

7. PapaSmurf

Posts: 10457; Member since: May 14, 2012

It's a prototype, meaning the final design will be different. Yes it will be made out of plastic, but if they can make it durable and not cheap, they'll take my money.

17. daftastic

Posts: 87; Member since: Jan 07, 2013

Hate to break the mood but the phone in this vid has the exact same curves and bezel as the teased SIV photo. This is no prototype.

44. kclgphilsbsa

Posts: 765; Member since: Jan 21, 2013

no the teased s4 photo has larger bezel.. somewhat s3ish and it has no ear speaker.. why would samsung deploys s4 looks when its video ads dont say something at all? anyway 14th is near :D

51. daftastic

Posts: 87; Member since: Jan 07, 2013

You weren't meant to brighten the image, and in the default image the speaker grills couldn't be seen because it was dark. Based on that teaser picture, you mean to tell me the SIV won't come with an ear speaker? The point is the bezel size and corner curves are an exact match. That is the SIV.

22. EXkurogane

Posts: 863; Member since: Mar 07, 2013

Im afraid that picture is the real Galaxy S4. You know, it;s not surprising for one reason - last year, Samsung's ad on the Galaxy S3 said "Real Phones have Curves" printed all over almost every newspaper i read... if they make a square Galaxy S4 that would mean .. you know... it;s not real phone LMAO. Still, a lousy design...

18. maccess

Posts: 742; Member since: Jan 16, 2013

so what dude.. even if the device looks awesome you'll still bash samsung no matter what.. why so butthurt?? if you don't like samsung just STFO!!

23. rgxVOiD

Posts: 440; Member since: Aug 30, 2012

*STFU Not here to bash it but how is stating that its ugly a butthurt?

26. maccess

Posts: 742; Member since: Jan 16, 2013

xperia knight is a well known samsung hater.. you just new to this site kid..

28. rgxVOiD

Posts: 440; Member since: Aug 30, 2012

I'm new to this site? lol, I'm here before him and you

33. SleepingOz unregistered

Calm down buddy, let these envious sony fanboys troll while they still can, until the launch of the real thing. Then they'll STFU.. Oh wait, they're biased sony fanboys, right?! Those who call every tech site that gives Samsung flagships more points than sony's biased. LMAO, haters gonna hate anyway..

25. rodkurt

Posts: 128; Member since: Nov 29, 2012

then go and buy expensive phones then.

27. nasznjoka

Posts: 418; Member since: Oct 05, 2012

heheeee!!!!!! Mr 'washed-out screen' aka 'the fisherman' aka 'the diver'........... Heard that you enjoy bashing SIV via your xperia Z while you're 'in the pool' or while bottom sea. is ma source correct?????

30. terry_wil

Posts: 6; Member since: Mar 12, 2013

rather look cheap and be the best than look Premium but be basic (HTC) looks are overrated with these smartphones when most users have to use some form of a case. Nothing special about htc phones except the physical look

47. Taters

Posts: 6474; Member since: Jan 28, 2013

Honestly, HTC is pretty bad in looks too. Sony makes some sexy phones though and the Nokia Lumia iPod design was nice until it got as big as a 920.

41. heyhi

Posts: 137; Member since: Feb 19, 2013

xperia-knight....i wonder why you always come into samsung articles and starts bashing the brand and a phone that is not even on the market...why XPERIA-knight? playstaion logo and xperia-knight? sonyfanboy maybe?? guys, im not here to defend sammy, but do you think they put this particular video and spend millions of dollars on mysterious ads videos to make everybody curious about whats inside a box?? it was like the S3 when they didnt reveal till its launching day...i guess they know how to create a hype

42. SleepingOz unregistered

It's beacuse he's the biggest, in-denial, Samsung fanboy! He's more obssessed by Samsung than sony. "Baseless hatred is all about jealousy, which is just confuse admiration." Nuff said.

48. Taters

Posts: 6474; Member since: Jan 28, 2013

Because he feels very strongly about Sony getting owned in North America and needs to release his frustrations by attacking the company he thinks that is the cause of Sony's problems.

5. xperiaDROID

Posts: 5629; Member since: Mar 08, 2013

Sounds cool, hope it will have decent viewing angles.

* Some comments have been hidden, because they don't meet the discussions rules.

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