'Retina Display' SFnally Perfect (Almost)

Apple's new retina display is certainly the highest resolution cell phone display evar. But is it really so perfect that the human retina is unable to distinguish pixels - that is, is it as good as reality?

Keep in mind that many science fiction writers need this level of display in order to present what are now called 'virtual realities' that are indistinguishable from the real world. Ray Bradbury's Veldt from The Illustrated Man and the Saga adventures from Arthur C. Clarke's 1956 novel The City and the Stars and the Star Trek: TNG holodeck require a display that is as good as reality.

Here's how Apple sets forth their argument:

... the Retina display’s pixel density is so high, your eye is unable to distinguish individual pixels.

By developing pixels a mere 78 micrometers wide, Apple engineers were able to pack four times the number of pixels into the same 3.5-inch (diagonal) screen found on earlier iPhone models. The resulting pixel density of iPhone 4 — 326 pixels per inch — makes text and graphics look smooth and continuous at any size.

Here's what the docs at MedGadget have to say:

The maximum spatial resolution (ability to differentiate two points) of the human eye occurs at the center of the visual field, corresponding to the fovea of the retina. At the fovea, the cone cells (there are no rods in the fovea) are jammed up close together at the highest density of the retina. Knowing this we can calculate the smallest pixels the fovea should be able to differentiate, but it takes a couple assumptions that we will lay out. The reader is encouraged to re-calculate the following based on their affinity for Apple.

1) Assuming 20/20 vision with bright lights and adequate contrast, the fovea has the ability to differentiate points around 1 arc-minute apart.

2) Assuming the user holds the phone at 1 foot (0.305 m) from their eyes, 1 arc-minute corresponds to 89 micrometers.

3) Apple's claim of 78 micrometers is smaller than 89 micrometers, however 2 points are needed to differentiate, so that is 78 x 2 = 156 micrometers, which is not.

Also, depending on the literature, there are claims the fovea can determine points 0.5 arc-minute apart, which is 44 micrometers. Regardless, it is close, and the user is unlikely to always be in perfect light or always using foveal vision and resolution drops off pretty dramatically a very short distance along the retina from the fovea.

From Apple, MedGadget and take a look at this very cool page on visual acuity.

Scroll down for more stories in the same category. (Story submitted 6/9/2010)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Display ")

Do You Still Want A Folding Screen Phone?
'A paper thin polycarbon screen unfurled...' - William Gibson, 1986.

'Princess Leia Project' Images That Float In The Air
Help me, Daniel Smalley; you're our only hope.

LG Rollable Version Of Niven's Poster TV
'A television that unrolled like a poster.' - Larry Niven, 1976.

Foldable Galaxy Phones, I Swear They're Coming (Maybe)
Apparently, it is very hard to do. We've been patient, though.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Sleeep PRO Earplug For Maximum Rest
'Merton... placed the electrodes of the sleep-inducer on his forehead.'

Inspired By Japan, Nap Pods For Hajj
It's always a good time for a nap.

Amphibio 3D Printed Gill Shirt
'... we can descend and live down there at one of those year-round aquatic resorts.'

How Do You Put An Asteroid Into Earth Orbit? Carefully!
'...she would have to be coaxed by another series of pats into a circular orbit.'

PD Aerospace Space Plane By 2023
'The sleek, tapered space shuttle lay immobile upon the private landing field...'

Foldimate Folds Your Clothes Perfectly
Look ma, my room is clean! I can hear you now.

Robots Help People Get Dressed, As Predicted In 1931
Yes, people of the future, robots will dress you.

International Space Station Leak Plugged - With Finger
'These tag-alongs search out stray leaks.'

Robot Snake Flies, Fights Fires
Just a prototype, but still amazing.

IPAL Chinese Robot Babysitter
'But Nanny is different...'

ZKZM-500 LASER Assault Rifle
'The Iranian reached back into the locker and got a pair of laserifles.'

LA Subway Scanner, As Seen In 'Total Recall'
'I'm afraid to tell you this Mr. Quaid, but you have suffered a schizoed embolism...'

Sion Electric Car Covered With Solar Panels
'It drew its power from six square yards of sunpower screens on its low curved roof.'

PAL-V Liberty Flying Helicopter Car
'...lifted themselves to skimming flight upon whirling helicopters."

Space Drones - UK's Effective Space To Launch Rocket Tugs
'Twenty rocket tugs towed it from its Earth hangar out into space.'

DIY Autonomous Robot Detects Trash
'The search-bug detached itself and rolled forward.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.