Papichulo#64
Csak, hogy egy picit meg tisztazzuk a Retina Display elnevezes koruli felreerteseket, foleg NEXUS6 szemelyeben - amennyiben mar kijozanodott ;)
"Elarulom hogy nem, Raymond Soneira irta, a DisplayMate Technolgies elnoke, aki Ph.D.-es es szamos vezeto optikai kutatasban reszt vett"
Nezzuk meg, hogy ugyanez a Dr. Raymond Soneira mit ir az altalad emlitett oldalon:
"There is a widespread misunderstanding of exactly what constitutes an Apple "Retina Display" - or any display that has an equivalent visual sharpness. While the first Retina Display on the iPhone 4 has 326 Pixels Per Inch PPI, all Retina Displays don't need 326 PPI because the eye's resolution is not based on linear Pixels Per Inch, but rather on angular resolution, so visual acuity depends on the viewing distance. That is why you take a standard vision test at 20 feet and aren't allowed to walk right up to the chart and read the smallest letters on the bottom line - visual acuity depends on the viewing distance.
Apple's Retina Display definition is equivalent to standard 20/20 Vision - your eyes won't be able to resolve the individual pixels on the display provided you don't look at the screen from too close a viewing distance. If you have 20/20 Vision and view the iPhone 4 from 10.5 inches or more its display will appear "perfectly" sharp to your eyes - meaning the display appears at the visual acuity limit of your eyes. If the display were any sharper with a higher PPI or higher pixel resolution your eyes wouldn't be able to see the difference. That is what "Retina Display" means... Let's see what PPIs are needed for other displays in order to qualify as a Retina Display:
iPhone 4, new iPad 3, and MacBook Pro Retina Displays: The new iPad 3 and MacBook Pro have much lower PPIs than the iPhone 4 but Apple correctly markets them as Retina Displays because they are typically held further away from the eyes and therefore still appear "perfectly" sharp at their proper viewing distance. Below we have calculated the viewing distances needed to qualify as a 20/20 Vision Retina Display (defined as 1 arc-minute visual acuity). For a discussion on the difference between the Acuity of the Retina and 20/20 Vision Acuity
The iPhone 4 with 326 PPI is a Retina Display when viewed from 10.5 inches or more
The new iPad 3 with 264 PPI is a Retina Display when viewed from 13.0 inches or more
The MacBook Pro with 220 PPI is a Retina Display when viewed from 15.6 inches or more"