P H I I ST-2004-4354 Dr. Eliav Haskal Coordinator Philips - - PowerPoint PPT Presentation

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I ST-2004-4354

• Dr. Eliav Haskal

Coordinator Philips Research eliav.haskal@ philips.com

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W hat is a Flexible Display?

“A technology for making flat panel displays on thin, flexible substrates”.

• The technology is suitable for a variety of applications.
• The applications use different attributes of the technology.
• The substrates might be glass, metal or polymer.
• The display might not be flexible in its application .

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FlexiDis

• FlexiDis focuses on direct preparation of active matrix

circuitry on novel substrates, including metal and plastic.

Why active-matrix? Because active-matrix displays have the potential to impact the largest range of display products.

• The display effects being tested for use in flexible displays

include O LED and Electrophoretics.

Thin display effects with excellent viewing angles

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FlexiDis will work on the development of materials and process technology, with a connection to industrial equipment and handling, to demonstrate:

• Bendable/Rollable display (in a small volume)
• Video display (full-color, ultrathin)

The possibility of setting these two displays in different markets (including telecom, automotive, …) will be analyzed.

Goals of FlexiDis

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Flexible =

• Flat square
• Flat non square
• Curved (1D)
• Conformable (2D)
• Bendable (1D)
• 1x Foldable (1D)
• Fully Roll able (1D)

Business Business week week

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Demonstrator Displays

• Rollable Display

Electrophoretic displays on flexible plastic substrates with organic thin-film driving transistors,

• Video display (full-color, ultrathin)

Full-color, ultrathin organic light- emitting displays (OLED) prepared directly on bendable metal and/or plastic foils with inorganic thin-film driving transistors for video applications.

No direct-deposited AMOLED examples

X

*SUFTLA, Seiko-Epson

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W hat are the challenges for flexible displays ?

• Substrates

– Properties, coatings and permeability

• Processing and Patterning

– Dimensional stability and thermal expansion mismatch

• Mechanics + Reliability

– Bending and cracking – Display design, coatings and substrates

• Industrialization, Cost and Market Scenarios

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Technical W orkpackages

• Basic research on the necessary enabling processand materialstechnologies for both

inorganic and organic TFT fabrication, including work on organic TFT materials, low temperature poly-Si processing suitable for flexible substrates, and microcrystalline Si,

• Display fabrication, including interconnects, driving electronics, for both

electrophoretic displays and OLED (both small-molecule and polymer) integration in top-emitting structures,

• The improvement of flexible plastic and metal substratesand moisture barriers

suitable for silicon thin film transistor and display processing,

• The creation of distortion measurement and compensation systems for patterning on

flexible foils using ink jet printing and photolithography,

• In-depth physical studies of the mechanical properties and materials behavior of

multilayer composite structures under flexing,

• Flexible display reliability standards and testing methodologies, and handling

concepts for manufacturing of flexible displays,

• Market studies and product definition for automotive, mobile telecommunications

and toys, and

• Constant benchmarking of different display types, substrates and active-matrix

technologies.

• Training, Innovation and Dissemination activities, Exploitation of results

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Substrate Display Effect Degree of Flexibility Production Technique Thin Film Transistor Met al f oil Polymer subst rat e Polymer / barrier subst rat e Elect rophoret ics Conf ormal / Curved Bendable Organic Elect roluminescence Rollable Sheet by Sheet Handling Roll t o Roll Organic Low- Temperat ure poly - Si Microcryst alline- Si Ot her 2005 2006 2007 2008 St art : 2004 FlexiDis durat ion (36 mont hs)

FlexiDis Roadmap

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FlexiDis Partners

11. N okia Research 12. Plastic Logic 13. Institute of Polymer Mechanics,

• Univ. Latvia

14. N ovaLED 15. ASML 16. LEGO 17. BMW 18. CN RS-EP, Ecole Polytechnique Palaiseau 19. IMEC 20. University of Cambridge 1. Philips Research (UK and N L) 2. Thomson Research (F and D) 3. STMicroelectronics 4. Avecia 5. Ecole Polytechnique Federale de Lausanne 6. Unaxis Displays (F) 7.

• Univ. Stuttgart

8. CEA-LETI 9. CN R Roma 10. Philips Center for Industrial Technology (CFT)

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EU User needs Acceptance Criteria Equipment Manufacturers for Display fabrication Display Materials Suppliers Display Manufacturers Display Module Manufacturers Device Integrators End Users Materials characterization Materials R & D Display EO Effect R & D Backplane R & D Manufacturing R & D Display characterization Human Factors Market Research Packaging & Interconnects R & D Systems Eng. R & D Module Specification Display Specification Material Selection, Equipment spec. TRDF FER AVE EPFL IPM UNX-F USTUTT LETI CNRS-EP CNR IMEC PLL CFT NOVA NOK LEGO ASML BMW PRL TDTB PRL-E UCAM STM

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