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 Decoding cement's shape promises greener concrete
08.12.2016 | Rice University

nachricht Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D
08.12.2016 | DOE/Brookhaven 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: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>