![]() But in the future, you could see e-Paper being used for video displays, ones that require very little current and that have a very wide viewing angle and that are useable in daylight. These advanced displays are beyond the reach of most experimenters, at least for now. As a result, the pattern is retained for a very long time, literally years or even decades.Īdvances in e-Paper technology have allowed for full-color displays, as well as improved switching time. This has the effect of changing the display pixels, which produces the pattern you see from the top.Īs an added bonus the charge on the capsules is retained indefinitely, the polarity reversal only needs to happen to change the existing display. When electrical charges are applied to the electrodes, with the top and bottom electrodes at the opposite polarity, the e-Ink capsules align themselves according to the electric charge. In an e-Paper display, these e-Ink capsules are suspended in a liquid polymer between two grids of electrodes, with each electrode being the width of an individual pixel. Multicolored e-Ink displays use colors other than black. The two different spheres have different colors, so their arrangement within the e-Ink capsule depends upon external electrical charges.īy altering the polarity of the electrical field around the capsules, their internal spheres can be attracted or repelled to show either a black or white surface. These displays employ millions of e-Ink capsules, each of these capsules contains both spheres that are either positively or negatively charged. When a charge is applied, the spheres move towards or away from the electric field, depending upon polarity. The original product was called “Gyricon”, and it consisted of polyethylene spheres measuring about 100 micrometers across.Į-Paper displays work using the principle of Electrophoresis, the movement of electrically charged molecules within an electric field. How e-Paper WorksĮ-Paper displays were originally developed in the early 1970s by Nick Sheridon at the XEROX Palo Alto Research Center (PARC). They also can be a good choice for portable instruments and “intelligent” price tags. Their low-power consumption and paper-like appearance make them ideal for replacing standard paper in books.Į-Paper also finds application in large display panels, such as the ones used in airports or bus terminals. A very common application is with e-readers, like the Amazon Kindle. They are more expensive than most other technologies.ĭespite these disadvantages, there are areas where e-Paper displays really shine.They don’t have very fast refresh rates.They work well in bright sunlight, and they provide a very wide viewing angle.Īside from visibility, there are other factors to consider with e-Paper displays. They are very much like conventional paper, readable in normal and brightly lit situations, but not in dim or dark lighting. ![]() Organic Light-Emitting Diodes, or OLEDs, are high-brightness displays that can be used in almost all lighting conditions, although they are a bit hard to see in direct sunlight.Įlectronic Paper, or e-Paper, displays are a bit of a different beast. ![]() ![]() Liquid Crystal Displays, or LCDs, are low-cost and are suitable for use in normal or low-light situations. We’ve used a number of different types of displays in our projects here in the DroneBot Workshop. While e-Paper displays might not be perfect for every application, they are great choices if you need a low-powered display that is visible in daylight.
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