Displays bendable

Flexible displays have attracted enormous interest from research institutes. The images of the flexible displays include bendable display, and electronic paper. The technology of flexible displays includes many domains the display modes, flexible substrates, and... 

For those with sight problems the University of Tokyo has developed a thin flexible polymer display where a system of Nafion polymer cantilevers pushes up 0.9 mm radius dots through a 10 pm polydimethylsilane membrane to a height of 0.25 mm above the display surface to form a Braille display. The thin flexible 1 mm thick bendable display is driven by a Braille input. The system is powered at 3 V which is sufficient to cause electro-osmosis which bends the cantilever by differential osmotic pressure. Removal of the voltage allows the cantilever to straighten up and though, theoretically the device can operate at up to 2 Hz, this is not physically possible with the installed organic transistor circuitry. The dots are displayed in a typical 2x3 dot Braille character array - the 4 cm prototype features four rows of six characters. 

Other authors, such as Yano and co-workers (2005) have indicated the extraordinary potential of nanocellulose as a reinforcement material in optically transparent plastics, for instance, or as a substrate for bendable displays. In their opinion, the composite remained optically transparent even at high fiber contents. 

Category Bending radius (cm) Bendability Advantages over rigid displays... 

In this article, we presented the organic material issues for common AMOLED. It was also reviewed that unique materials of AMOLED could create the new applications such as paper-thin, foldable, bendable and transparent displays. Although there remain some problems unsolved, we are convinced that AMOLED should be the leader of information display in the near future. 

Another important applieation field for printable electronics are backplanes for active-matrix displays. These baekplanes, which contain up to several millions of transistors, ideally will be fully printed. When flexible plastic substrates are used, the displays can be bendable and rollable while retaining their original performance. The stacked layers of materials are extremely thin, in the order of hundreds of nanometers, and therefore light-weight ideal properties for an E-book reader. 

As described earlier in this chapter, polymers are long chains of atoms linked together. They may be flexible and bendable. To explain this, one may visual them as ball-and-stick model. In chemistry, the ball-and-stick model is a molecular model of a chemical substance which aims to display both the three-dimensional position of the atoms and the bonds between them. The atoms are typically represented by spheres, connected by rods which represent the bonds. Double and triple bonds are usually represented by two or three curved rods, respectively. The chemical element of each atom is often indicated by the sphere s color and size. The top of Figure 1.6 shows a drawing of a ball-and-stick model of a molecule. Figure 1.6 also indicates that there is free rotation around the single bonds. If there was a double or triple bond, there would not be any rotation possible around those bonds. 

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