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When introducing the iPhone 4 , Steve Jobs said the number of pixels needed for a Retina display is about PPI for a device held 10 to 12 inches from the eye. Any display's viewing quality from phone displays to huge projectors can be described with this size-independent universal parameter. Note that the PPD parameter is not an intrinsic parameter of the display itself, unlike absolute pixel resolution e. It can be calculated by the formula.
That aperture, which can be measured by visual field tests , varies widely among different human subjects. In practice, thus far Apple has converted a device's display to Retina by doubling or tripling the number of pixels in each direction, quadrupling the total resolution. This increase creates a sharper interface at the same physical dimensions. The sole exception to this has been the iPhone 6 Plus, which renders its display at triple the number of pixels in each direction, before down-sampling to a p resolution.
The displays are manufactured worldwide by different suppliers. Reviews of Apple devices with Retina displays have generally been positive on technical grounds, with comments describing it as a considerable improvement on earlier screens and praising Apple for driving third-party application support for high-resolution displays more effectively than on Windows. Reviewing the iPhone 4 in , Joshua Topolsky commented:. Not only are the colors and blacks deep and rich, but you simply cannot see pixels on the screen…webpages that would be line after line of pixelated content when zoomed out on a 3GS are completely readable on the iPhone 4, though the text is beyond microscopic.
That much resolution is stunning. It will set a bar for future resolution that every other manufacturer of devices and PCs will have to jump. Writer John Gruber suggested that the arrival of Retina displays on computers would trigger a need to redesign interfaces and designs for the new displays:. The sort of rich, data-dense information design espoused by Edward Tufte can now not only be made on the computer screen but also enjoyed on one.
Regarding font choices, you not only need not choose a font optimized for rendering on screen, but should not. Fonts optimized for screen rendering look cheap on the retina MacBook Pro—sometimes downright cheesy—in the same way they do when printed in a glossy magazine. He says that the physiology of the human retina is such that there must be at least pixels per inch in a pixelated display for the pixels to become imperceptible to the human eye at a distance of 12 inches mm. The picture will look pixelated.
So in my opinion, what Jobs said was fine. Soneira, while technically correct, was being picky. However, near visual acuity is usually poor due to presbyopia  in nearly everyone over 40, such that decreasing reading distance can actually reduce perceivable resolution.
This was an isolated case for the platform however, as all other Symbian-based devices had larger displays with lower resolutions. Some older Symbian smartphones, including the Nokia N80 and N90 , featured a 2. The first Android smartphones with the same display - Meizu M9 was launched a few months later in beginning of In October of the same year Galaxy Nexus was announced, which had a display with a better resolution.
Aside from resolution, all generations of iPhone Retina displays receive high ratings for other aspects such as brightness and color accuracy, compared to those of contemporary smartphones, while some Android devices such as the LG G3 have sacrificed screen quality and battery life for high resolution. Ars Technica suggested the "superfluousness of so many flagship phone features—the move from p to p to p and beyond From Wikipedia, the free encyclopedia.
This article is about the HD screens of Apple products. For the heads-up-display technology, see Virtual retinal display. Brand name for high resolution displays featured in many products from Apple Inc. Part of a Retina display on an iPhone 4. The pixels are not visible at normal viewing distance, creating an impression of sharp print-like text. Part of a non-Retina display on an iPhone 3GS. The pixels are visible at normal viewing distance.
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Retrieved Archived from the original on Rather, it is simply a display in which the pixels are so dense that you can see each of them from a normal viewing distance. This allows you to read the texts more clearly and view crispier images. Though the number of pixels and resolution of the screen are important for a retina display, but, the more important aspect of it is the pixel density.
This pixel density is measured in PPI or Pixels Per Inch and usually the pixel density on a retina display is more than pixels per square inch. This pixel density is what makes the screen live up to its claim. It is this density that makes the individual pixels imperceptible to the human eye when it is viewed from a normal distance. This is because this is actually the limit of a human eye that shows a clear image when viewed from a distance of up to 10 to 12 inches away from the eyes.
However, there are a few specific displays of these types that come with much lower pixel density, which, in turn, owes to its greater viewing distance. The further you are from the screen, lower the pixel density can be, and still make it impossible for you to see individual pixels. The screen resolution of a retina display is of x pixels. This means that the pixel density of such screens is PPI. However, the MacBook Air released in came with a resolution of x pixels. The resolutions of these screens may also vary.
The resolution of the cheaper and older models seems to have a lower resolution, but, alternately, the newer and higher priced models tend to deliver much crispier and better images. There are also a few other types of displays on the laptops and smartphones of today that are simply better in comparison to the retina displays. These displays do not only have a higher screen resolution, but are also better in several other factors as well. Few high-end laptops come with such displays.
There are several reasons for it such as:. However, in comparison to a retina display, the downside to an AMOLED display is that the colors may look more saturated at times which may make the images look unrealistic. It also makes the screen more vulnerable to image burns. There is a common belief among people that a retina display may cause harm to the eyes.
Well, there are quite a few complaints about eye issues, but several studies and researches have shown that it is actually not due to the retina display itself but, in fact, it is for the blue light emitted by the screens. Remember, a retina display is so designed that the resolution itself of it is safe because it is the amount that the human eyes are traditionally used to. As said earlier, the specific element that does the magic is the Pixels Per Inch of the display, which is approximately PPI.
Since the human eye can detect a pixel density of around pixels per inch and the retina display comes with a pixel density, this improves the quality of the image. This is because the pixels are almost invisible to the users and have smoother lines and higher resolution. This makes it easier for the users to read the texts on the screen. On the other hand, it also offers a far better and cleaner user interface. Due to the improvements made in the technology and design of a retina display, it offers a wider viewing angle than those devices without it.
This means you can see the images clearly from any side of it and not only from the front of the screen. The Retina display comes with a better and wider color gamut which enhances the color saturation of the screen as well as the images displayed on it. The users will have a much better viewing experience while using a retina display. This is because these screens have a higher contrast ratio between different colors, which means the images will have better color accuracy, reproduction, and presentation.
Screen real estate. The high resolution of the retina display provides more real estate of the screen to fit in more info on it and still keep them legible. This makes the screen more useful for not only the users but also for the app developers as they can make the most out of the screen space available.
A retina display allows better consumption of content whether it is simple images or videos, graphics or websites, eBooks or web articles, and even games. This feature makes these types of high-resolution displays best suited for creative professionals who are into photo editing , graphic designing , and more.
It is all due to its ability to reproduce images with more and finer details. A retina display will cause less eye strain even if you spend a lot of time in front of your computer. This is due to its ability to produce sharper images and you will not need to put an extra effort or strain your eyes to focus on a specific area on the display.
This is a much better technology that promises better outdoor visibility even under direct sunlight. In this high-end emissive display technology, the individual pixels are turned off to demonstrate the blacks in a given area. Though the initial investment on a retina display will be more in comparison to an ordinary display but it will provide more value in return down the road. It also consumes less energy making it more cost efficient. Laptops, or any other product with a screen for that matter, that comes with a retina display is much more expensive.
Though the high pixel density is good for the images or the eyes, there are quite a few specific web contents or apps that cannot make the most out of it because these are not optimized fully. Therefore, the images of these websites and apps are not adaptable and are not reproduced accurately and look slightly distorted. It also looks a bit pixelated on a retina display. Sometimes, the high contrast ratio of the retina display causes the backlights to leak out.
This is because the pixels on the darker areas of the images are turned off selectively, thanks to its emissive technology. The pixel response time may be slower at times as well, especially in those retina displays on low-end devices. However, the liquid retina displays do not come with this drawback because the hardware is much better which improves the refresh rate of the display to make it as high as Hz.
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As mentioned above, resolution higher than retina may not make a very noticeable difference. The retina displays also have very good colour balance, brightness. pewees.online › Laptops. The cost of Apple MacBook Air With Retina Display Laptop is Rs. The cost of HP Pavilion cctx Laptop is Rs. Display comparison. HP.