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Bluebermuda, do you have knowledge of these problems or is this all conjecture? Obviously some people are having problems, but the way you talk, no iMac would ever really be worth buying...

I would not touch a late 2009 iMac with a ten foot pole however I am an extremely well informed consumer. I suppose that they would however, make a nice boat anchor. :D
 
I would not touch a late 2009 iMac with a ten foot pole however I am an extremely well informed consumer. I suppose that they would however, make a nice boat anchor. :D

Ok, but you did not cite your SOURCE. Where did you GET this info regarding the yellow phosphor on the blue RGB's? As a course of my CAREER, I can't deal with a display with a poor color gamut. Really, I need to know ASAHP, so I can cancel my order if what you say is true, but I'm afraid I may need more than just your word. If this is a fact, and you can point it out, this needs to be KNOWN by the consuming public.
 
This post has me seriously reconsidering my purchase. Where are you getting this info?

The information on white vs rgb led's is common knowledge.

White LEDs
White light-emitting diodes are usually blue InGaN LEDs with a coating of a suitable material. Cerium(III)-doped YAG (YAG:Ce3+, or Y3Al5O12:Ce3+) is often used; it absorbs the light from the blue LED and emits in a broad range from greenish to reddish, with most of output in yellow. The pale yellow emission of the Ce3+:YAG can be tuned by substituting the cerium with other rare earth elements such as terbium and gadolinium and can even be further adjusted by substituting some or all of the aluminium in the YAG with gallium. However, this process is not one of phosphorescence. The yellow light is produced by a process known as scintillation, the complete absence of an afterglow being one of the characteristics of the process.
Some rare-earth doped Sialons are photoluminescent and can serve as phosphors. Europium(II)-doped β-SiAlON absorbs in ultraviolet and visible light spectrum and emits intense broadband visible emission. Its luminance and color does not change significantly with temperature, due to the temperature-stable crystal structure. It has a great potential as a green down-conversion phosphor for white LEDs; a yellow variant also exists. For white LEDs, a blue LED is used with a yellow phosphor, or with a green and yellow SiAlON phosphor and a red CaAlSiN3-based (CASN) phosphor.[14][15][16]
White LEDs can also be made by coating near ultraviolet (NUV) emitting LEDs with a mixture of high efficiency europium based red and blue emitting phosphors plus green emitting copper and aluminium doped zinc sulfide (ZnS:Cu,Al). This is a method analogous to the way fluorescent lamps work.

http://en.wikipedia.org/wiki/Phosphor
 
The information on white vs rgb led's is common knowledge.

Apparently less common than you might think, because I can find ZERO documentation indicating this. PLEASE, can you provide a link, not only for me, but for the whole community?
 
I would not touch a late 2009 iMac with a ten foot pole however I am an extremely well informed consumer. I suppose that they would however, make a nice boat anchor. :D

So in your well informed opinion is an iMac EVER worth buying? In 2010? I need an OSX desktop soon. At this rate, Apple has ZERO good desktop purchases.
 
The information on white vs rgb led's is common knowledge.

White LEDs
White light-emitting diodes are usually blue InGaN LEDs with a coating of a suitable material. Cerium(III)-doped YAG (YAG:Ce3+, or Y3Al5O12:Ce3+) is often used; it absorbs the light from the blue LED and emits in a broad range from greenish to reddish, with most of output in yellow. The pale yellow emission of the Ce3+:YAG can be tuned by substituting the cerium with other rare earth elements such as terbium and gadolinium and can even be further adjusted by substituting some or all of the aluminium in the YAG with gallium. However, this process is not one of phosphorescence. The yellow light is produced by a process known as scintillation, the complete absence of an afterglow being one of the characteristics of the process.
Some rare-earth doped Sialons are photoluminescent and can serve as phosphors. Europium(II)-doped β-SiAlON absorbs in ultraviolet and visible light spectrum and emits intense broadband visible emission. Its luminance and color does not change significantly with temperature, due to the temperature-stable crystal structure. It has a great potential as a green down-conversion phosphor for white LEDs; a yellow variant also exists. For white LEDs, a blue LED is used with a yellow phosphor, or with a green and yellow SiAlON phosphor and a red CaAlSiN3-based (CASN) phosphor.[14][15][16]
White LEDs can also be made by coating near ultraviolet (NUV) emitting LEDs with a mixture of high efficiency europium based red and blue emitting phosphors plus green emitting copper and aluminium doped zinc sulfide (ZnS:Cu,Al). This is a method analogous to the way fluorescent lamps work.

http://en.wikipedia.org/wiki/Phosphor

It's not that I don't believe you about the "white" LED functionality vs RGB, I want to know where you got the information that they were being USED in these displays, and also where you got the information that it has only a 45% of NTSC spec. THAT info is what we need, not a Wikipedia link.

Seriously, pony up, or I'm gonna have to call foul on this.
 
Unfortunately Apple did not choose to install a high quality screen in the new iMacs thus many screens are plagued by the yellow tinge issue. The new iMac's use a cheap "White" LED back lit screen instead of the more advanced Red Green Blue RGB LED back lit screens which HP developed in conjunction with Dreamworks and which are now being rolled out in HP and Dell computers.

Apple gambled that the average consumer was too unsophisticated to recognize the difference and they clearly lost the bet. If too much yellow phosphor is added to a blue LED so as to produce a "white" LED then the end result can be a (yellow sweat stained undershirt) area on the LCD screen directly over the defective "white LED's).

RGB LED based backlit screens use three separated colors (red, green, blue) contrary to the white ones (WLED) which use one (usually blue diode covered with yellow phosphor). They have significantly higher color gamut compared to white LEDs and standard CCFLs. In other words, better image quality, truer/richer/deeper.. whatever color. The white LED screens have a color gamut of 45% NTSC or Adobe RGB, the RGB LED screens are closer to or exceed 100%.
This is retarded. Do you have any idea how much more RGB LED backlit displays cost compared to white LED displays? Google it if you're curious. There's no way the price of the new iMac would be anywhere but in the stratosphere if RGB LED backlit displays were used.

bluebermuda has some good points, but his overall "Chicken Little" tone makes them hard to extract.
 
There is no Santa!! :-(

I have been dragging my feet in my desire and intention to jettison Windows for the Apple experience. It was love at first sight when I saw my first iMac.
Then, reading MacRumors, I'd learn about alleged and real improvements just around the corner.
The 27" i7 was everything I was waiting for and I was about to place an order.
THEN, it hit the fan.
The problems, some real, some imagined and some possibly overblown sound more like Windows than what I have been led to believe is the Apply "just working"!
Fortunately, my Windows machine still works. Fortunately, I've waited this long, so a few more weeks or months won't kill me.
My problem is naivete. Is this typical? Was I dreaming believing the Mac hype.?
Someone please tell me it isn't so. When will it be "safe" to get my new iMac 27-i7?
Cheers,
Steve
 
It's not that I don't believe you about the "white" LED functionality vs RGB, I want to know where you got the information that they were being USED in these displays, and also where you got the information that it has only a 45% of NTSC spec. THAT info is what we need, not a Wikipedia link.

Seriously, pony up, or I'm gonna have to call foul on this.

Well I wouldn't doubt they are using it. Apple lately is going as cheap as possible on every piece of hardware they make, which is disappointing. The fact their OS is tied to this incredibly cheap hardware is simply frustrating beyond belief. Let me install OSX on my own hardware please. I can make a machine that absolutely crushes the Mac Pro's in terms of performance AND quality for a thousand dollars.

The fact the screens are yellowing is proof enough they are using this. However I am not sure it is a huge deal overall unless you are doing absolutely critical color work. I use Dell 2209wa's which are also cheaper e-IPS displays, and they seem to have a bit of discoloration similar to what is described in the iMac's, but it's really not a big deal to me and I'm quite a perfectionist. It trounces TN any day of the week.
 
So in your well informed opinion is an iMac EVER worth buying? In 2010? I need an OSX desktop soon. At this rate, Apple has ZERO good desktop purchases.

I would not say that an iMac will never be worth buying, on the other hand I certainly would not purchase the current model at this time, but that is just me.

Think through things in a logical manner.

Intel should bring its new Arrandales processors to the market on January 3rd 2010, 4 days ahead of the opening of the 2010 CES in Las Vegas, 3 references are expected : 2 Core i5 and 1 Core i7. It is pretty obvious that the Macbook Pro will be refreshed with the new i5 and i7 processors and it is likely that the new Macbook Pro will have a RGB LED screen. In fact, in my opinion, Apple would have to be insane not to include a RGB LED screen in the new Macbook Pro.

A RGB LED in the new Macbook Pro would be startling in comparison to the "White" LED used in the late 2009 iMac and would serve to highlight the profound differences between the two displays. Once people see the difference side by side........well............the cat is out of the bag. :D
 
This is retarded. Do you have any idea how much more RGB LED backlit displays cost compared to white LED displays? Google it if you're curious. There's no way the price of the new iMac would be anywhere but in the stratosphere if RGB LED backlit displays were used.

bluebermuda has some good points, but his overall "Chicken Little" tone makes them hard to extract.

True, the price-tag of every RGB LED backlit display I've seen is incredibly high, over a thousand dollars even just for a 20". Clearly, a display of this type (other than perhaps a second monitor, and a TINY one), is out of my price range.

Every single review I've seen of the iMac has had nothing but excellent things to say about the display. If some of the white-LEDs are leaking yellow-phosphor, and mine happens to be one, I'll exchange it for one that does NOT have that problem. As for the color gamut allegations (45% of NTSC), I still want to see evidence of that. Everything I've read except a few threads on this forum and a couple articles CITING the threads on this forum and one or two others, has pointed to this simply being the best all-in-one ever, and perhaps the best display Apple currently offers. I'm keeping my order.
 
I would not say that an iMac will never be worth buying, on the other hand I certainly would not purchase the current model at this time, but that is just me.

Think through things in a logical manner.

Intel should bring its new Arrandales processors to the market on January 3rd 2010, 4 days ahead of the opening of the 2010 CES in Las Vegas, 3 references are expected : 2 Core i5 and 1 Core i7. It is pretty obvious that the Macbook Pro will be refreshed with the new i5 and i7 processors and it is likely that the new Macbook Pro will have a RGB LED screen. In fact, in my opinion, Apple would have to be insane not to include a RGB LED screen in the new Macbook Pro.

A RGB LED in the new Macbook Pro would be startling in comparison to the "White" LED used in the late 2009 iMac and would serve to highlight the profound differences between the two displays. Once people see the difference side by side........well............the cat is out of the bag. :D

But then what? Then you still have a 2009 iMac with the white backlighting? You think Apple doesn't realize this stuff? What makes you so sure the MBP will get the better backlighting anyway?

I think wringing hands over minor imperfections stands in the way of producing quality work. If an iMac worked 100% it would not really prevent you from doing anything. Of course, at this point, that could be a decent sized if. But if I wait 6 months to buy an iMac, then we are 6 months away again from another great upgrade. So what do I do in that time period? Sit here and fret away my time over if the next machine will have better backlighting?

If you NEED OSX for dev work, and the Mac Pro is a COMPLETE rip off, what other choice is there really? I don't want to keep using my laptop (which I am right now) for work...it's just too frustrating and not intended for what I am doing. I can't really think of an alternative...
 
It's not that I don't believe you about the "white" LED functionality vs RGB, I want to know where you got the information that they were being USED in these displays, and also where you got the information that it has only a 45% of NTSC spec. THAT info is what we need, not a Wikipedia link.

Seriously, pony up, or I'm gonna have to call foul on this.

It is very simple, ask a "Genius" at your local Apple store. Of course they will not have a clue, but that is beside the point. Apple uses "white" LED's in the new iMac.

I am not here to educate you. Read the the specs yourself. They are common knowledge.
 
I don't think its exactly a secret that Apple are using the cheapest possible e-IPS screens. Its made by LG for heavens sake.!

there have been other threads, either on here or on AI about it.
 
But then what? Then you still have a 2009 iMac with the white backlighting? You think Apple doesn't realize this stuff? What makes you so sure the MBP will get the better backlighting anyway?

I think wringing hands over minor imperfections stands in the way of producing quality work. If an iMac worked 100% it would not really prevent you from doing anything. Of course, at this point, that could be a decent sized if. But if I wait 6 months to buy an iMac, then we are 6 months away again from another great upgrade. So what do I do in that time period? Sit here and fret away my time over if the next machine will have better backlighting?

If you NEED OSX for dev work, and the Mac Pro is a COMPLETE rip off, what other choice is there really? I don't want to keep using my laptop (which I am right now) for work...it's just too frustrating and not intended for what I am doing. I can't really think of an alternative...

The reason that the new MBP will have to have a RGB LED screen is very simple, competition.

Contrary to popular believe RGB LED screens are no longer higher priced alternatives. Can you imagine Apple releasing a new Macbook Pro without a RGB LED screen and competing with Dell and HP laptops which have RGB LED screens? Let's be serious.
 
The reason that the new MBP will have to have a RGB LED screen is very simple, competition.

Contrary to popular believe RGB LED screens are no longer higher priced alternatives. Can you imagine Apple releasing a new Macbook Pro without a RGB LED screen and competing with Dell and HP laptops which have RGB LED screens? Let's be serious.

Well yeah, because Apple has been getting away with making some pretty crappy hardware and still trouncing the competition with it. Have you been paying attention to, you know...the news?
 
It is very simple, ask a "Genius" at your local Apple store. Of course they will not have a clue, but that is beside the point. Apple uses "white" LED's in the new iMac.

I am not here to educated you. Read the the specs yourself. They are common knowledge.

:rolleyes: Booooy, it's a good thing you're NOT here to "educated" me. Otherwise I might end up as confused as you.

The more googling I do about this display, the more good things I read about it. The only bad thing I've read about it is some flickering errors and some yellowing on some of them. It's under warranty. If it's bad, Apple will replace it. If it wears out after 3 years, I'm not going to care because I'll have a new computer by then anyhow. Even if they DO use white LED's, so do most of the displays out there, and even the 30" ACD still uses CFL, and not even LED backlighting. So whatever, chicken little. Keep on cluckin'.
 
It is very simple, ask a "Genius" at your local Apple store. Of course they will not have a clue, but that is beside the point. Apple uses "white" LED's in the new iMac.

I am not here to educated you. Read the the specs yourself. They are common knowledge.

HA, HA, HA!! What is this nonsense dribble you just wrote?

You don't know. Your just filling the forums with BS.
 
Well yeah, because Apple has been getting away with making some pretty crappy hardware and still trouncing the competition with it. Have you been paying attention to, you know...the news?

"No one ever went broke underestimating the intelligence of the American public."
--H.L. Mencken

Just wait until the consumer sees a RGB LED back lit Macbook Pro next to a "White" LED back lit iMac. Apple will have indeed hoisted itself on its own petard. :D
 
"No one ever went broke underestimating the intelligence of the American public."
--H.L. Mencken

Just wait until the consumer sees a RGB LED back lit Macbook Pro next to a "White" LED back lit iMac. Apple will have indeed hoisted itself on its own petard. :D

If they improve their products, then great. But if some of us have real work to do, what do you suggest? Seriously?

Life isn't perfect, so it's ok if my computer isn't, for the time being. Especially if it's generally good enough, and pays the bills.
 
HA, HA, HA!! What is this nonsense dribble you just wrote?

You don't know. Your just filling the forums with BS.

Please, grow up. Apple uses cheap "white" LED's for back lighting on the new iMacs. No serious photographer or graphic artist would even consider using such a display. Of course the average amateur, which is Apple's typical customer, would not have a clue unless they discover that they have a yellow tinged screen, similar to a sweat stained white under shirt.
 
Please, grow up. Apple uses cheap "white" LED's for back lighting on the new iMacs. No serious photographer or graphic artist would even consider using such a display. Of course the average amateur, which is Apple's typical customer, would not have a clue unless they discover that they have a yellow tinged screen, similar to a sweat stained white under shirt.

The iMac's are pretty much aimed at consumers, but are capable of some pro work, or perhaps "prosumer" work, depending on what you're doing.

The Mac Pro's are vastly overpriced for what you get so...not sure what other choice people have. It's either an Apple machine or windows, but I can't do on Windows what I need to do.
 
Also BB, who is making IPS panels with RGB backlighting, that are affordable? Just curious. A TN panel with an RGB backlight is useless.
 
Apple uses cheap "white" LED's for back lighting on the new iMacs. No serious photographer or graphic artist would even consider using such a display. Of course the average amateur, which is Apple's typical customer, would not have a clue unless they discover that they have a yellow tinged screen, similar to a sweat stained white under shirt.

OK so prove it. put up or shut up. Lets see what you have.

And your comment about pros not using these iMacs is just ridiculous.
 
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