Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Project for the Research of Highly Rugged and Lightweight Liquid Crystal Displays

04.09.2013
Aiming for Unbreakability

Displays for smartphones or tablet-PCs should be highly ruggedized at little overall weight. For curved displays, that might play a role in advertising or the automotive sector, a certain flexibility of the display materials is mandatory.


Flexbible monochrome e-paper display from Plastic Logic. Picture: Plastic Logic

Together with national and international industry partners, scientists at the University of Stuttgart have started the development of very robust and extremely lightweight displays within the research project LiCRA. Instead of common glass substrates these displays are based on plastic foils what makes them flexible. The overall market for rugged displays is estimated to a total of seven billion (milliard) US$ until 2015 .

Partners of the LiCRA consortium other than the Institute of Large Area Microelectronics of the University of Stuttgart are the British company plastic logic, the Israelian company Etkes and sons, the south German company LOFO High Tech Film GmbH from Weilheim am Rhein, micro resist technology GmbH from Berlin and as an associated partner the pharmaceutical, chemical and life-science-company Merck KGaA from Darmstadt. The project is scheduled for 30 month and is funded with a total of 1.5 million Euros by the German federal ministry of science and education and the national funding agencies of the international partners, respectively.

Together with Plastic Logic, scientists of the University of Stuttgart will develop a process flow for the assembly of liquid crystal cells on plastic. For this purpose Plastic Logic will advance and adapt its organic thin film transistor (OTFT) technology, which has been used for monochrome e-paper displays so far. The actual mounting process for the liquid crystal cells will be developed at the University of Stuttgart. Challenges for these developments are in particular the necessity to work in the low temperature regime as well as the flexibility of the substrates.

In addition, the University of Stuttgart investigates the production of organic light emitting diodes (OLEDs) with polarized light emission. Such OLEDs would be advantageous in that way that an additional backlight and one of the two polarizer sheets, which so far are necessary for liquid crystal cells, could be omitted.

Etkes and sons will develop a back light unit (BLU), which fulfils the requirements of a rugged and lightweight display.

micro resist technology GmbH will develop materials and processes for nano imprint lithography. While the production if microelectronic structures with classic lithography means exposure of a photo resist with UV light and subsequent development of the resist, in nano imprint lithography the desired structures are directly transferred to an adequate nano imprint resist by the use of a mould. Within the LiCRA project, the use of this technology, which promises not only reduces production cost but also increased display resolution, will be investigated in the process chain of OTFTs on plastic substrates.

LOFO High Tech Film will develop the plastic films required for the realization of the liquid crystal displays. Special attention will be paid on low deformation during the successive production of the liquid crystal displays as well as minimized optical birefringence as both would degrade the optical performance of the displays. The solvent casting process used by LOFO is especially suitable for this purpose because the polymer solution can be filtered extremely fine, the films are barely stretched and are thus almost strainless.

Further information:
Prof. Dr. Norbert Frühauf, Universität Stuttgart, Institut für Großflächige Mikroelektronik, Tel. 0711/685-66922, E-Mail: igm (at) igm.uni-stuttgart.de
Andrea Mayer-Grenu, Universität Stuttgart, Abt. Hochschulkommunikation, Tel. 0711/685-82176,

E-Mail: andrea.mayer-grenu (at) hkom.uni-stuttgart.de

Andrea Mayer-Grenu | idw
Further information:
http://www.uni-stuttgart.de

More articles from Materials Sciences:

nachricht Researchers printed graphene-like materials with inkjet
18.08.2017 | Aalto University

nachricht Superconductivity research reveals potential new state of matter
17.08.2017 | DOE/Los Alamos National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>