Why 4 inches? Because a bigger screen makes routine tasks much more plesant, browsing the web, reading ebooks, watching videos, playing games, everything looks much nicer on a bigger screen.
I get not wanting the phone to be larger. But it actually wouldn't have to be...
Originally Posted by Sedrick:
I worked some mock-ups in my cad program and a 4" screen will fit (in the iPhone, without making it bigger):
If Apple cuts down on the amount of room the bezel takes, the screen could be made 4 inches without making the phone any bigger. People get turned off by the size of some Android phones. But that's only because Andriod phones are often poorly designed, have a ton of extranous space for logos and unneeded buttons, waste a ton of space and are generally way bigger and thicker than they need to be. However, there is no rational reason why someone wouldn't want a 4" screen on the iPhone if the phone remains roughly the same size and shape as the iPhone 3GS, 3G and original iPhone.
If the resolution stays the same, none of the apps would have to be updated. And the resolution can stay the stame, the Retina Display would still keep it sharp. Many people don't realize just how high a 320 dpi really is. The vast majority of devices including your laptop probably have a dpi of under 140. A 4" screen with a 960x640 resolution would have a dpi of ~290 which is still twice the dpi of most devices including most Macbook Pros and Apple Cinema Displays.
The advantages of a 4 inch screen are numerous. Typing, websites, ebooks, emails, videos, games would all look and be much easier to use with a 4 inch screen. The iPhone, once cutting edge, currently has the smallest screen of any popular smartphone. I suggest playing around with smartphones with 4 inch screens to see just how much more pleasant a bigger screen can make browsing, book reading, gaming and video playback. The current iPhone has a large bezel that could be done away with to accommodate a 4 inch screen without increasing the overall size of the phone much at all. The Galaxy S has a much smaller bezel and is perfectly comfortable to hold inspite of this.
Take a look at this picture, comparing the iPhone to the Galaxy S which offers a 4" screen, and yet manages to be approximately the same size and weight as the iPhone 4.
Compare the screen size and display of the Galaxy S (4") and the iPhone 4 (3.5").
Externally, both phones are almost identical in size. The Galaxy S has a bigger screen but a smaller bezel.
"From my experience, it's far easier to use the on screen keyboard, browse online, read pdfs, emails and e-books, and watch movies with an extra inch of diagonal real estate. Everything just looks nicer, especially games, websites read easier when the text isn't quite so tiny, and movies feel more immersive. It's shocking how big a difference..." -iPhonedHome
Here is a picture of a mock iPhone that maintains the same identical height as the iPhone 4 (it is wider though) while managing to pack a whopping 4.5" screen...
The current home button is starting to look a little stale, this addresses that (though I'm not happy with this iteration either, I'm sure Apple could do better). Also examine how the design maximizes the screen size by reducing the bezel.
It's not only tech geeks that enjoy watching videos on the iPhone, browsing the web on the iPhone, reading ebooks on the iPhone, reading maps on the iPhone, looking at and showing off pics on the iPhone, all tasks that are made substantially easier with a bigger screen. I am willing to bet that a general sample of all iPhone owners would show similar stats, with most wanting a bigger screen that makes these tasks easier and more pleasent.
You probably already notice that colors on OLED display cellphones have deeper blacks, appear more vibrant and tend to pop more especially when viewing photographs and video, compared to the iPhone 4's display.
Any of the blurriness/inaccuracies that occur in some OLED screens occur as a result of the use of pentile subpixels. An OLED display that uses RGB subpixels as indicated wouldn't have any such issues. They would however retain the rich deep colors and deep blacks that OLED displays offer.
In addition to this, Wikipedia lists the following advantages of OLED displays over IPS displays such as those found in the iPhone 4.
Better power efficiency: LCDs filter the light emitted from a backlight, allowing a small fraction of light through so they cannot show true black, while an inactive OLED element does not produce light or consume power.
Response time: OLEDs can also have a faster response time than standard LCD screens. Whereas LCD displays are capable of a 1 ms response time or less offering a frame rate of 1,000 Hz or higher, an OLED can theoretically have less than 0.01 ms response time enabling 100,000 Hz refresh rates.
Light weight & flexible plastic substrates: OLED displays can be fabricated on flexible plastic substrates leading to the possibility of Organic light-emitting diode roll-up display being fabricated or other new applications such as roll-up displays embedded in fabrics or clothing. As the substrate used can be flexible such as PET, the displays may be produced inexpensively.
Wider viewing angles & improved brightness: OLEDs can enable a greater artificial contrast ratio (both dynamic range and static, measured in purely dark conditions) and viewing angle compared to LCDs because OLED pixels directly emit light. OLED pixel colours appear correct and unshifted, even as the viewing angle approaches 90 degrees from normal.
Compared to standard OLEDs, Active-matrix OLED displays provide higher refresh rates than their passive-matrix OLED counterparts, and they consume significantly less power. This advantage makes active-matrix OLEDs well suited for portable electronics, where power consumption is critical to battery life.
And compared to OLED displays, Super AMOLED displays have additional advantages...
20% brighter screen
80% less sunlight reflection
20% reduced power consumption
http://en.wikipedia.org/wiki/Super_AMOLED
This is why I hope to see a 4 inch Super AMOLED Active-Matrix 960x640 resolution display with full RGB subpixels in the next iPhone.
If you want to see such a display in the iPhone 5, email Steve Jobs...
I hear his email is sjobs@apple.com
I get not wanting the phone to be larger. But it actually wouldn't have to be...
Originally Posted by Sedrick:
I worked some mock-ups in my cad program and a 4" screen will fit (in the iPhone, without making it bigger):
If Apple cuts down on the amount of room the bezel takes, the screen could be made 4 inches without making the phone any bigger. People get turned off by the size of some Android phones. But that's only because Andriod phones are often poorly designed, have a ton of extranous space for logos and unneeded buttons, waste a ton of space and are generally way bigger and thicker than they need to be. However, there is no rational reason why someone wouldn't want a 4" screen on the iPhone if the phone remains roughly the same size and shape as the iPhone 3GS, 3G and original iPhone.
If the resolution stays the same, none of the apps would have to be updated. And the resolution can stay the stame, the Retina Display would still keep it sharp. Many people don't realize just how high a 320 dpi really is. The vast majority of devices including your laptop probably have a dpi of under 140. A 4" screen with a 960x640 resolution would have a dpi of ~290 which is still twice the dpi of most devices including most Macbook Pros and Apple Cinema Displays.
The advantages of a 4 inch screen are numerous. Typing, websites, ebooks, emails, videos, games would all look and be much easier to use with a 4 inch screen. The iPhone, once cutting edge, currently has the smallest screen of any popular smartphone. I suggest playing around with smartphones with 4 inch screens to see just how much more pleasant a bigger screen can make browsing, book reading, gaming and video playback. The current iPhone has a large bezel that could be done away with to accommodate a 4 inch screen without increasing the overall size of the phone much at all. The Galaxy S has a much smaller bezel and is perfectly comfortable to hold inspite of this.
Take a look at this picture, comparing the iPhone to the Galaxy S which offers a 4" screen, and yet manages to be approximately the same size and weight as the iPhone 4.
Compare the screen size and display of the Galaxy S (4") and the iPhone 4 (3.5").

Externally, both phones are almost identical in size. The Galaxy S has a bigger screen but a smaller bezel.
"From my experience, it's far easier to use the on screen keyboard, browse online, read pdfs, emails and e-books, and watch movies with an extra inch of diagonal real estate. Everything just looks nicer, especially games, websites read easier when the text isn't quite so tiny, and movies feel more immersive. It's shocking how big a difference..." -iPhonedHome
Here is a picture of a mock iPhone that maintains the same identical height as the iPhone 4 (it is wider though) while managing to pack a whopping 4.5" screen...

The current home button is starting to look a little stale, this addresses that (though I'm not happy with this iteration either, I'm sure Apple could do better). Also examine how the design maximizes the screen size by reducing the bezel.
With all the new media apps coming this yr and into next, it's ridiculous to watch all that on a 3.5 inch screen no matter how high the resolution. I'm a media guy and would much rather watch all that hi-res on a 4.whatever screen rather than a 3.5. At least sell two phones. One for the soon to be minority 3.5ers, and one for the rest of us. Why waste all that valuable iPhone space on those black bars on the side of the screen?
It's not only tech geeks that enjoy watching videos on the iPhone, browsing the web on the iPhone, reading ebooks on the iPhone, reading maps on the iPhone, looking at and showing off pics on the iPhone, all tasks that are made substantially easier with a bigger screen. I am willing to bet that a general sample of all iPhone owners would show similar stats, with most wanting a bigger screen that makes these tasks easier and more pleasent.
You probably already notice that colors on OLED display cellphones have deeper blacks, appear more vibrant and tend to pop more especially when viewing photographs and video, compared to the iPhone 4's display.
Any of the blurriness/inaccuracies that occur in some OLED screens occur as a result of the use of pentile subpixels. An OLED display that uses RGB subpixels as indicated wouldn't have any such issues. They would however retain the rich deep colors and deep blacks that OLED displays offer.
In addition to this, Wikipedia lists the following advantages of OLED displays over IPS displays such as those found in the iPhone 4.
Better power efficiency: LCDs filter the light emitted from a backlight, allowing a small fraction of light through so they cannot show true black, while an inactive OLED element does not produce light or consume power.
Response time: OLEDs can also have a faster response time than standard LCD screens. Whereas LCD displays are capable of a 1 ms response time or less offering a frame rate of 1,000 Hz or higher, an OLED can theoretically have less than 0.01 ms response time enabling 100,000 Hz refresh rates.
Light weight & flexible plastic substrates: OLED displays can be fabricated on flexible plastic substrates leading to the possibility of Organic light-emitting diode roll-up display being fabricated or other new applications such as roll-up displays embedded in fabrics or clothing. As the substrate used can be flexible such as PET, the displays may be produced inexpensively.
Wider viewing angles & improved brightness: OLEDs can enable a greater artificial contrast ratio (both dynamic range and static, measured in purely dark conditions) and viewing angle compared to LCDs because OLED pixels directly emit light. OLED pixel colours appear correct and unshifted, even as the viewing angle approaches 90 degrees from normal.
Compared to standard OLEDs, Active-matrix OLED displays provide higher refresh rates than their passive-matrix OLED counterparts, and they consume significantly less power. This advantage makes active-matrix OLEDs well suited for portable electronics, where power consumption is critical to battery life.
And compared to OLED displays, Super AMOLED displays have additional advantages...
20% brighter screen
80% less sunlight reflection
20% reduced power consumption
http://en.wikipedia.org/wiki/Super_AMOLED
This is why I hope to see a 4 inch Super AMOLED Active-Matrix 960x640 resolution display with full RGB subpixels in the next iPhone.
If you want to see such a display in the iPhone 5, email Steve Jobs...
I hear his email is sjobs@apple.com
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