The trend-forward world of display technology relies on innovative materials and novel approaches to steadily advance the visual experience, for example through higher pixel densities, better contrast, larger formats or user-friendler design. Fraunhofer ISC’s newly developed materials for optics and electronics now broaden the application potential of next generation displays. Learn about lower cost-effective wet-chemical printing procedures and the new materials at the Fraunhofer ISC booth # 1021 in North Hall D during the SID International Symposium on Information Display held from 22 to 27 May 2016 at San Francisco’s Moscone Center.
To enable mass production in advanced display technology, manufacturing must be cost-effective and simple. This can best be achieved through more adaptable and cheaper materials but solutions for some important key details had been lacking and conventional materials tend to be expensive or not versatile enough.
The new Fraunhofer ISC sol-gel materials and inorganic-organic hybrid polymers now allow just such a simple and cost-effective processing with wet-chemical printing or roll-to-roll processes. They also advance optical, mechanical and electrical properties to open up a whole new range of applications and design options for flexible, transparent or 3D displays.
Transparent and flexible touchscreens
Up to now, there was no technology to realize flexible and transparent touchscreens with corresponding electronics. Fraunhofer ISC now presents the adequate material, already put to use within the EU-funded “Flashed!” project: printed quasi-transparent polymer piezo-sensors.
These sensors register it all: deformation, e.g. when bending a display, pressure, e.g. applied by a fingertip, and, if demanded, changes in temperature. This is why they work equally well for large curved surfaces, for turn-over displays or the on-screen operation of a flexible tablet – none of which is possible with an indium-tin-oxide-based touchscreen display.
A simple screen printing process is all it takes to apply the sensor pastes onto PET films.
The application potential of Fraunhofer ISC’s novel flexible and transparent materials does not stop here. They are also suitable to realize passivation layers and insulators in circuit boards or conductive and semi-conductive layers.
As an alternative to expensive indium tin oxide (ITO) or further metal oxide semiconductors, such as IGZO, indium-free metal oxides could be applied by dip-coating, spraying or printing in a sol-gel process.
Better light yield
Fraunhofer ISC materials are equally beneficical as intermediate layers, e.g. in OLED lighting panels. While OLEDs can be produced at low cost and are economical in use, they nevertheless suffer from scatter loss of light owing to rough interfaces between conductive and protective layers.
The scattering action could be much better controlled with a smooth, high refractive index, sol-gel based layer incorporating scatter centers. Depending on the composition, the actual light output could be significantly increased to more than 50%. Other applications for better light management in displays are feasible.
There is much room for improvement in 3D representation and virutal reality. To advance holographic »true-to-life« 3D representations, manufacturers look to new methods and materials. Fraunhofer ISC offers novel solutions for diffractive and holographic optical elements and 3D patterning by two-photon polymerization (2PP).
Direct laser writing with two-photon absorption (TPA) – the underlying process of 2PP – enables an almost arbitrary microstructuring of surfaces and is fast, cheap and simple in comparison to conventional 3D patterning methods. In 3D displays, porous layers for liquid crystals enable switchable optical elements of variable thickness. These are suitable techniques to further optimize true 3D representations.
Marie-Luise Righi | Fraunhofer-Institut für Silicatforschung ISC
Scientists channel graphene to understand filtration and ion transport into cells
11.12.2017 | National Institute of Standards and Technology (NIST)
Successful Mechanical Testing of Nanowires
07.12.2017 | Helmholtz-Zentrum Geesthacht - Zentrum für Material- und Küstenforschung
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
14.12.2017 | Health and Medicine
14.12.2017 | Physics and Astronomy
14.12.2017 | Life Sciences