Why flash?

thibaulthalpern · 03-18-2009, 01:12 PM

What is the purpose of the flashing when digital readers change screen display? it happens on all the readers I have seen either in person or on YouTube.

zelda_pinwheel · 03-18-2009, 01:15 PM

Quote:

Originally Posted by thibaulthalpern

What is the purpose of the flashing when digital readers change screen display? it happens on all the readers I have seen either in person or on YouTube.

the flash on e-ink screens is to set the display back to zero, so to speak, and reduce "ghosting" of previous pages showing under the new page.

JSWolf · 03-18-2009, 01:15 PM

It erases the screen so when the screen is drawn, there isn't ghosting.

kevindorsey · 03-18-2009, 03:14 PM

Good to know.

pilotbob · 03-18-2009, 03:17 PM

It's sort of like turning over your etch-a-sketch and shaking. The eink screen just does it really fast.

BOb

cerement · 03-18-2009, 03:24 PM

Quote:

Originally Posted by pilotbob

It's sort of like turning over your etch-a-sketch and shaking. The eink screen just does it really fast.

Why would you erase an Etch-a-Sketch?

MoboHobo · 03-18-2009, 10:57 PM

Quote:

Originally Posted by JSWolf

It erases the screen so when the screen is drawn, there isn't ghosting.

Did not know that. It's true when they say you learn something everyday.

Jellby · 03-19-2009, 06:12 AM

In the Cybook you can turn off the flashing, then you see why it is useful

zelda_pinwheel · 03-19-2009, 07:35 AM

Quote:

Originally Posted by cerement

Why would you erase an Etch-a-Sketch?

heh, i would have posted that if you hadn't.

CTH · 03-19-2009, 08:55 AM

I wonder if a white flash would work... It would probobly look nicer

S.Canton · 03-19-2009, 01:15 PM

I originally thought you were asking why flash memory is used. :P Anyway, interesting about the screen flash; I was wondering that myself, but a "refresh" makes sense.

mjh215 · 03-20-2009, 05:53 AM

Quote:

Originally Posted by CTH

I wonder if a white flash would work... It would probobly look nicer

Actually what it is doing is reversing the screen, it isn't just a black flash but black and white. It is just the largest percentage of the screen is white so you mostly notice a black flash. The black text flashes white. As Jon stated this zeroes out the screen prior to drawing the next page. This is at least my understanding of it.

-MJ

Lemurion · 03-20-2009, 08:03 AM

...because Green Lantern was busy.

Nate the great · 03-20-2009, 08:10 AM

Quote:

Originally Posted by thibaulthalpern

What is the purpose of the flashing when digital readers change screen display? it happens on all the readers I have seen either in person or on YouTube.

That's where they hide the subliminal messages.

yagiz · 03-20-2009, 08:52 AM

It's probably more expensive and less accurate to specifically discharge the particles in the writings so they do a total wipe-out...

03-18-2009, 01:12 PM	#1
thibaulthalpern Evangelist Posts: 478 Karma: 451808 Join Date: Feb 2009 Location: California, USA Device: my two eyes, KLiiK, Sony PRS-700	Why flash? What is the purpose of the flashing when digital readers change screen display? it happens on all the readers I have seen either in person or on YouTube.

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03-18-2009, 01:15 PM	#3
JSWolf Resident Curmudgeon Posts: 79,235 Karma: 145488788 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	It erases the screen so when the screen is drawn, there isn't ghosting.

03-18-2009, 03:14 PM	#4
kevindorsey Evangelist Posts: 488 Karma: 258 Join Date: Mar 2009 Device: kindle	Good to know.

03-18-2009, 03:17 PM	#5
pilotbob Grand Sorcerer Posts: 19,832 Karma: 11844413 Join Date: Jan 2007 Location: Tampa, FL USA Device: Kindle Touch	It's sort of like turning over your etch-a-sketch and shaking. The eink screen just does it really fast. BOb

03-19-2009, 06:12 AM	#8
Jellby frumious Bandersnatch Posts: 7,543 Karma: 19001583 Join Date: Jan 2008 Location: Spaniard in Sweden Device: Cybook Orizon, Kobo Aura	In the Cybook you can turn off the flashing, then you see why it is useful

03-19-2009, 08:55 AM	#10
CTH Zealot Posts: 129 Karma: 1000153 Join Date: Jan 2007	I wonder if a white flash would work... It would probobly look nicer

03-19-2009, 01:15 PM	#11
S.Canton Groupie Posts: 174 Karma: 12 Join Date: Jan 2009 Device: Kindle 2	I originally thought you were asking why flash memory is used. :P Anyway, interesting about the screen flash; I was wondering that myself, but a "refresh" makes sense.

03-20-2009, 08:03 AM	#13
Lemurion eReader Posts: 2,750 Karma: 4968470 Join Date: Aug 2007 Device: Note 5; PW3; Nook HD+; ChuWi Hi12; iPad	...because Green Lantern was busy.

03-20-2009, 08:52 AM	#15
yagiz http://is.gd/4flJX Posts: 134 Karma: 422 Join Date: Jan 2008 Device: Sony PRS-505, iPhone 3G	It's probably more expensive and less accurate to specifically discharge the particles in the writings so they do a total wipe-out...

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