Citizen LCD retains image even when off
By Marc Perton 
posted Apr 17th 2006 11:03AM
posted Apr 17th 2006 11:03AM
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Now if only they could do an active matrix screen, in colour - this would be perfect for those digital phoo frames that are becoming popular.
Ben Hobbs
it looks black and white only. is this the case?
Now screen burn is a feature! Pure genius.
This is actually nothing new. Kent Displays sells these kind of displays. http://www.kentdisplays.com
OMG IT SAYS "BANANA"!!
So is this cooler than e-ink? Cheaper maybe? Something?
-KJ
Nice.
Imagine if your (digital) watch only has to power up a bit to refresh the display, instead of constantly providing a stream of power to display the time.
Talk about having a long battery life.
Um...e-ink anyone? same thing but better.
djdole:
Citizen made a watch that used an e-ink display, it only directed power to the display once a minute (hours, minutes, no seconds). The display was flexible too.
yeah and even more a cellphone external display. It would only have to change once per minute rather then only once per second
Do not confuse "active" display with "passive" display types. This is a passive type display using several key technologies for image rentention. However, with every refresh, there is the "paging" effect which will limit its applications.
Dammit Silver... I wanted to post bananna first :( Its like all these years of japanese are finally paying off ^_^
afaik it's just smectic LC (FLC in that case). with good bistability of course. at least they presented some prototypes based on smectics some times ago.
possibility to make such devices is well known.
and it's not the same thing what Kent Displays makes.
p.s. of course it can be new development and it has nothing to do with their previous work with smectics.
And to reset it, you just have to grab it by both sides and shake it up and down vigorously... Etch-A-LCD!
p.s. of course it can be new development and it has nothing to do with their previous work with smectics.
Well that reminds me of the time my buddy dropped his DS off of a school roof... Well now it retains its picture completley when powered off. It was pretty interesting.
Currently, LCDs already consume very minimal wattage, now this technology can cut even further to probably by 10 to 100 times. With this technology the power consumption now is based on the number of screen refreshes. Thus, screens which refresh less often, like minute timers, would reduce their power consumption dramatically; whereas, LCD refresh often will see less of a benefit.
Now which applications stand to benefit from this technology? Reasonably, I only see a small niche market of LCD devices which demand long battery life, for everything else the cost trade off which most like favor older LCD technology. The only application which comes to mind is low power consumption portable marketing displays.
Thanks Brian Glassman
Technology
www.techrd.com
Late post, but they should use it with ebooks. It will conserve power between page flips.
This is not new technology, remember a BBC programme call tomorrows world, where they showed memory LCDs, was being used as part of system for control a car speed, where a camera would scan a road sign, the LCD display would retain the image.
This is talking 5-8 years ago