Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book General > News

Notices

Reply
 
Thread Tools Search this Thread
Old 09-04-2007, 03:20 AM   #1
TadW
Uebermensch
TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.TadW ought to be getting tired of karma fortunes by now.
 
TadW's Avatar
 
Posts: 2,583
Karma: 1094606
Join Date: Jul 2003
Location: Italy
Device: Kindle
Study on ergonomics of e-paper

While I don't have access to the PubMed, here the abstract of an interesting paper that explores the optimal viewing distance and screen angle for e-paper (emphasis mine):

Quote:
Data analysis showed that the mean viewing distance and screen angle were 495 mm and 123.7 degrees. The mean viewing distances for Kolin Chlorestic Liquid Crystal display was 500 mm, significantly longer than Sony electronic ink display, 491 mm. Screen angle for Kolin was 127.4 degrees, significantly greater than that of Sony, 120.0 degrees. Various light sources revealed no significant effect on viewing distances; nevertheless, they showed significant effect on screen angles. The screen angle for sunlight lamp (D65) was similar to that of fluorescent lamp (TL84), but greater than that of tungsten lamp (F). Ambient illumination and E-paper type had significant effects on viewing distance and screen angle. The higher the ambient illumination was, the longer the viewing distance and the lesser the screen angle. Character size had significant effect on viewing distances: the larger the character size, the longer the viewing distance. The results of this study indicated that the viewing distance for E-Paper was similar to that of visual display terminal (VDT) at around 500 mm, but greater than normal paper at about 360 mm. The mean screen angle was around 123.7 degrees, which in terms of viewing angle is 29.5 degrees below horizontal eye level. This result is similar to the general suggested viewing angle between 20 degrees and 50 degrees below the horizontal line of sight.
TadW is offline   Reply With Quote
Old 09-04-2007, 07:36 PM   #2
igorsk
Wizard
igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.igorsk ought to be getting tired of karma fortunes by now.
 
Posts: 3,442
Karma: 300001
Join Date: Sep 2006
Location: Belgium
Device: PRS-500/505/700, Kindle, Cybook Gen3, Words Gear
127.4 degrees is "significantly greater than" 120.0?
igorsk is offline   Reply With Quote
Advert
Old 09-04-2007, 07:47 PM   #3
europas_ice
Groupie
europas_ice doesn't littereuropas_ice doesn't littereuropas_ice doesn't litter
 
europas_ice's Avatar
 
Posts: 188
Karma: 220
Join Date: Aug 2007
Location: Moscow, ID
Device: iPhone 11 (Kindle app & iBooks)
It is probably significantly greater than the mean variation within a group. For example, if the variations within a group were only about 1 degree, then finding a difference of 7 degrees between the groups would be significant. I haven't read the article but I'm assuming they got a bunch of people to read from the displays and they measured the distance and angle they held it at. And actually, considering that there's only a 90 degree difference between holding it flat and holding it vertical, 7 degrees does seem like quite a bit. I wonder what the difference was?
europas_ice is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Recent research study on e-paper doctorow News 1 02-09-2009 12:47 AM
Swedish design study of future e-paper Alexander Turcic News 13 03-04-2008 01:28 AM
Study announced on the commercial use of e-paper Alexander Turcic News 1 02-14-2006 02:31 PM
Study examines potential impact of e-paper Alexander Turcic News 0 10-24-2005 05:00 AM
Study - Paper or Pixels: What are People Reading Online? Colin Dunstan News 1 07-25-2004 07:59 AM


All times are GMT -4. The time now is 12:33 AM.


MobileRead.com is a privately owned, operated and funded community.