Not true, it all has to do with the pixel density: the higher the pixel density, the more trouble light has to pass through the display.That's not the real reason why the display brightness changed. The iPhone 3GS used TFT display technology while the iPhone 4 used significantly higher quality IPS technology. The iPad will not change in brightness, as the display technology will not change.
It's hardly a fraction of what it cost then, the estimate for the screen assembly for the iPad 2 was about 20-25% higher than that of the iPad 1. Not all component costs plummet. The costs for the iPhone 4S display assembly were pretty much the same as for the iPhone 4.People seem to not know that technology gets cheaper every year. If they would use the same display that's been used since the iPad 1, I would feel ripped off because it'll only cost a fraction of what it cost in 2010.
Well, they will be blurry, because they would need to be upscaled.Pictures on web sites will look identical to how they look now. Identical. Now, relative to the new crisper text next to them, they may feel worse, but they won't actually be different.
So why is my iPhone 4S then much brighter than my 3GS?Not true, it all has to do with the pixel density: the higher the pixel density, the more trouble light has to pass through the display.
Apple is rumoured to use either other screen technology (IGZO instead of IPS) ór to add a second LED bar for extra brightness.
Pixels are not halved - you need to have everything created in 4x resolution or it will be upscaled and look terrible (see non retina application on iPhone 4). Of course for vector things it done automatically, but for pixel things (icons, controls, most of apps graphics and pictures you need high resolution version.I made a simple diagram for you guys:
I used black lines to seperate pixels. Every pixels gets doubled, so for every pixels there was, two will be created. But since the pixel size is halved, the image will look exactly the same (think without the black lines).Of course it's not as simple as this, but this is the essence (if you don't look at the display at 1 inch distance).
yes there will be 4 pixels where there is one. You confused the issue by saying the pixels were halved in size when they are halved in BOTH height size and length size so there are 4 times as many pixels not twice as many. Also there will be text fonts and pictures in the higher resolution so it will be the scaler's problem to know when to quadruple the pixels or not to. That's where the problem with displayed content comes in. The current graphics processor on the iPhone handles this but the iPad 3 will have many more pixels to manipulate and a more powerful chipset will be needed.So 4 retina pixels are the same physical size as 1 non-retina pixel, right? If a scaler just doubles every pixel and maps it accordingly, the image will exactly the same. It's only logic.
The way this works is a bit weird - the cost of a chip is mostly based on the size of the chip. You're right, it'll need a new GPU to drive the screen, and the new GPU will be bigger than the current one. It'll likely have a new CPU too, which will make it even bigger. That means more expensive. On the other hand, they'll likely move the chip to a new 'process', which can make the same chip smaller than the old process. Basically all the tiny parts that make up the chip get shrunk. End result: the new chip might be the same size as the old one and use the same amount of power - despite it being faster and more powerful and containing more parts.The current graphics processor on the iPhone handles this but the iPad 3 will have many more pixels to manipulate and a more powerful chipset will be needed. I don't think they can make that for the same price as current iPads but we shall see soon enough.
Not perse if they lower the transistor size (which they will).psonice said:You're right, it'll need a new GPU to drive the screen, and the new GPU will be bigger than the current one.
Yes, the 3GS screen is indeed not as bright as the iPhone 4 screen.The display will be darker and not as bright like comparing the 3GS to Iphone 4.
TFT stands for thin film transistor. All smartphone screens, including AMOLED, use TFT technology.The iPhone 3GS used TFT display technology while the iPhone 4 used significantly higher quality IPS technology.
Comparing apple.com on an iPad 2 at full landscape width to an iPhone 4 showing the same page at the same physical scale, the images look indeed a bit blurrier on the latter. Mostly because the upscale filter is simple bilinear. But in my eyes text crispness and lack of any screen door effect are far more important.Well, they will be blurry, because they would need to be upscaled.
For example - take current apple.com webpage - its prepared for aproximately 1024px vertical resolution.
It's not how the eye perceives it, though. Seen from a typical distance, the pixel-doubled, resolution-doubled image will look somewhat sharper and more pixelated. Four dots of light (considering one subpixel color) spread over an area leave a different visual impression than a single, bigger dot of light.So 4 retina pixels are the same physical size as 1 non-retina pixel, right? If a scaler just doubles every pixel and maps it accordingly, the image will exactly the same. It's only logic.