http://www.epapercentral.com/forums/ The definitive site for electronic paper news & information en Sat, 11 Feb 2012 17:28:04 +0000 http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-431 Fri, 17 Jul 2009 12:23:01 +0000 keysersoze 431@http://www.epapercentral.com/forums/ <blockquote><p><cite>genixez <a href="http://www.epapercentral.com/forums/topic/limits-in-flexible-e-paper-technology/#post-429">said</a>:</cite><br /> Are they more focused on making a flexible back plane as compared to a flexible front plane?</p> </blockquote> <p>Back plane. </p> http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-429 Mon, 13 Jul 2009 15:23:04 +0000 genixez 429@http://www.epapercentral.com/forums/ <p>I agree that there are many limits with these emerging technologies. My key question is: What is the key priority for manufacturers of flexible e-paper displays? Are they more focused on making a flexible back plane as compared to a flexible front plane? </p> http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-426 Wed, 08 Jul 2009 18:51:41 +0000 keysersoze 426@http://www.epapercentral.com/forums/ <p>Unfortunately there are teething problems with almost all of the technologies you mention. I am not intimately familiar with all of them but by way of an example nanowires suffer from difficult deposition, poor yields and high levels of contaminants in the final products. I don't think that nanotubes (and likely wires) will really make it because of the health worries. they are all roughly the same size dimensions and are almost all linked to asbestosis - this is not a worry as a product, but unfortunately people take these things apart and expose themselves. As an example, the black in E-Ink is either carbon black or a copper based particle - I am not sure which and E-Ink don't give this much info. If they are the copper one that particle is carcinogenic and people just take them apart and put videos on youtube, and I always wonder "do you know the dangers of the materials you're handling??!!".</p> <p>In my opinion organic electronics will be the solution, but I could well be wrong!! I often am! </p> http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-423 Mon, 06 Jul 2009 20:21:38 +0000 genixez 423@http://www.epapercentral.com/forums/ <p>keysersoze: </p> <p>Thanks for the insights! My next question would be: There are so many technologies out there such as single walled carbon nanotubes, PEDOT:PSS and silver nanowires which are much more flexible than ITO as a transparent electrode and are looking to replace ITO in the flexible display market. It seems to me that back plane technology is the limiting factor for e-paper, OLEDs and such. Would there be real and sustainable interest from e-paper display manufacturers in ITO replacement technologies? </p> http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-422 Mon, 06 Jul 2009 19:36:40 +0000 keysersoze 422@http://www.epapercentral.com/forums/ <p>Hey - ask all the questions you want! I just hope we can come up with the answers!</p> <p>The target for "flexible" means to be able to be rolled up like sheets of PVC - the coloured plastic people use to cover lights sometimes to give them colours. I think if the epaper were to be actually folded almost all would fail, but that's also dependant on the cell technology and architecture.</p> <p>The limit for this isgoing to be set by the frontplane and backplane technology combination. The current frontplane is quite flexible really, but this is limited by materials and by the thickness of the frontplane. This is the easy part in my opinion.</p> <p>The backplane is harder to make flexible - that breakthrough will probably come when organic electronics really hits as current backplanes are mostly relaint on using non-flexible materials and keeping them aligned using something solid like ITO.</p> <p>For the particles being misaligned, that won;t really be the problem, but fracturing of the microcapsules could happen, though they are also made from flexible materials too and I'm not sure what the limit of this will really be! They will find that certain frontplanes will lend themselves to flexibility better.</p> <p>The other problem may be that if you bend and the front and backplanes become slightly misaligned, you will get cross-talk between the 2 meaning cells which shouldn;t be switched, might be because they are now in contact with an electrode they shouldn't have been in contact with. Also, if the electrophoretic display uses a colour filter and this become misaligned when flexed....well....you get the picture...or not ;) </p> http://www.epapercentral.com/forums/general-discussion/limits-in-flexible-e-paper-technology/#post-421 Mon, 06 Jul 2009 18:44:01 +0000 genixez 421@http://www.epapercentral.com/forums/ <p>Just wondering: How flexible can a flexible e-paper be with current e-paper technology? PVI has been boasting their Magic Mirror and EpLAR manufacturing technology. Can the e-paper made be rolled up like a real piece of paper or just simply bent at the edges? What is the ultimate limiting factor for flexible e-paper? I am thinking if these companies are still using ITO as front plane electrodes, the device can't be too flexible? Also, there is the issue of making flexible back planes. Is flexibility also limited by electrophoretic technology? Will the particles become misaligned if you bend the device too much? </p> <p>I have so many questions about e-paper! Will be great to get some suggestions. </p>