Middle East Journal of Applied Science & Technology (MEJAST)
(Peer Reviewed International Journal) Volume 3, Issue 1, Pages 05-09, January-March 2020 Design and Verification of New Generation Flexible Electronics and Display
M.Srimathidevi1, C.Jerlin Christina Grace2, N.Esakiammal Sivaranjani3, B.Nisharni4 & G.Jayaraman5
1,2,3,4UG Scholar, 5Assistant Professor, Department of ECE, Francis Xavier Engineering College, Tirunelveli, India. Email: [email protected], [email protected], [email protected], [email protected], [email protected]
Article Received: 09 November 2019 Article Accepted: 17 January 2020 Article Published: 05 February 2020
ABSTRACT
This technology is increasingly being used in a number of applications which benefit from their light weight, favourable dielectric properties, robust, high circuit density and conformable nature. Flexible circuits can be rolled away when not required. To replace glass, plastic substrate must offer properties like clarity, dimensional stability, low coefficient of thermal expansion, elasticity etc. Using the leading cholesteric liquid crystal technology of ITRI, we develop a rewritable, environmentally friendly thermal printable e-paper. The e-paper, devised to reduce traditional paper consumption, achieves a high resolution of 300 dpi with a memory function. In addition, we report on the ITRI's initial success in demonstrating a complete R2R process for multisensing touch panels on thick glass substrates provided by Corning. Recent advances in organic and inorganic based electronics proceeds on flexible substrate, offer substantial rewards in terms of being able to develop displays that are thinner, lighter and can be rolled when not in use. This paper will discuss about the properties, preparation methods, applications and challenges in this rapidly growing industry.
1. INTRODUCTION
The characteristic of flexible electronics not only reduces cost and they have light weight, thinner, non-breakable & new forms to create many new applications. These new displays can be bent and, in some cases, even folded, or rolled, which was unthinkable with previous displays. This is largely because the rigid glass part of a traditional at panel display can now be replaced with plastic or ultrathin glass. ITRI has developed cross-divisional, multidisciplinary teams that engage engineers and scientists with broad professional backgrounds and training. It is optically transparent, viscoelastic, chemically and thermally stable, highly flexible, hydrophobic and can easily be moulded with high resolution and aspect ratio. Numerous people in the display industry are increasingly considering roll-to-roll (R2R) manufacturing for its potential in reducing the cost of slower batch processing and capital-intensive vacuum- based processing. Basically, flexible electronics deals with circuits developed using Thin Film Transistors (TFT). Different TFT technologies are available today to develop circuits.
The main driving force for OLED display is its emissive characteristics, good colour saturation and clarity. It is also sunlight readable. This technology is suitable for the bi-stable displays such as electrophoretic and cholesteric displays can be used in applications which require only occasional image updates such as advertising, map applications, point of sale labels etc.
Additionally, they achieve high-precision alignment by means of image scaling to compensate for substrate distortion due to processing; and they also performs high-throughput photoablation, patterning millions of pixels simultaneously, by means of projection imaging. This technology is attractive for current and emerging applications, such as flexible circuit boards and flexible chip carriers, as well as for potential future applications such as such as flexible displays and macroelectronic systems.
5 | P a g e ISSN (Online): 2582- 0974 Website: www.mejast.com
Middle East Journal of Applied Science & Technology (MEJAST)
(Peer Reviewed International Journal) Volume 3, Issue 1, Pages 05-09, January-March 2020
2. EXISTING SYSTEM
Of the many critical components in personal mobile devices, the display is perhaps the most important because it facilitates interactions between man and machine. Recent trends in the development of screen technology have focused on the form factor, energy conservation, and eco-friendliness. Meanwhile, e-paper-based bistable displays have the potential to meet the need for displays that conserve energy and can operate for long periods.
Vices on flexible as well as rigid substrates, the substrates undergo several processing steps that can cause the boards to expand or contract asymmetrically. Such distortion arises from exposure to elevated temperatures, mechanical stresses from handling and changes in surface material compositions. In the manufacturing of many large-area electronic devices on flexible as well as rigid substrates, the substrates undergo several processing steps that can cause the boards to expand or contract asymmetrically. Such distortion arises from exposure to elevated temperatures, mechanical stresses handling and changes in surface material compositions vices on flexible as well as rigid substrates, the substrates undergo several processing steps that can cause the boards to expand or contract asymmetrically. Such distortion arises from exposure to elevated temperatures, mechanical stresses from handling and changes in surface material compositions.
Before introducing the different types of flex displays, an overview of the enabling technologies is necessary. These technologies include many components that must be compatible and convergent to enable a truly flexible display. The necessary technologies include robust flexible substrates, conducting transparent conducting oxides and/or conducting polymers, electro-optic materials, inorganic and organic electronics, and packaging technologies. In applications such as smart phones and tablets, and AMOLED production technology using plastic substrates is under development among display Manufacturers. Samsung Electronics and LG Electronics have already announced that they will introduce AMOLED products to the marketplace. LCD backplanes are patterned at critical dimensions of 3–5 m, and TFT backplanes-on-flex would call for similar requirements. In addition to the advantages of thinner and lighter LCD displays that will result from flexible TFT backplanes, roll-able displays will be possible when flexible backplanes are used to drive organic light-emitting diode (OLED)-based displays
3. PROPOSED SYSTEM
Personal mobile devices serve as the driving force of these displays, and increasing demands are being made to meet the battery capacity and lightweight needs of these devices. The proposition in the second stage is for the individualization and development of a framework for foldable products. The driving force behind this development includes trendy designs and personal wearable applications, such as health-monitoring devices, local-based services, handsets, foldable tablets, and smart phones. The various types of electro-optic materials for flexible display fall into three categories emissive, reflective, and trans missive. For emissive applications, small molecules and polymers are being used for OLED applications. In order to have a truly low power display, a reflection mode of operation will have to be implemented on flexible substrates. Polymer-dispersed liquid crystals, encapsulated electro phoretics, gyricon, and bichromic ball composites all operate in the reflective mode. For
6 | P a g e ISSN (Online): 2582- 0974 Website: www.mejast.com
Middle East Journal of Applied Science & Technology (MEJAST)
(Peer Reviewed International Journal) Volume 3, Issue 1, Pages 05-09, January-March 2020 electronic book and paper applications, an efficient reflective mode display is crucial to eliminate the power consuming backlight.
4. RESULT
In this project future Aspects Development strategy of flexible electronics is dependent on global technology progresses and market today, flexible circuits which are also known around the world as flexible printed wiring, forecasts.
As flexible displays become cheaper to manufacture we will likely see new functions of this technology. While curved devices are the first to hit the market, recent patent filings by top display manufacturers suggest that foldable, bendable, and rollable devices are not that far away. Foldable displays will likely come first to accommodate the growing demand for larger displays and the need for portability. As the wearable device market grows, bendable displays could be used to wraparound an individual’s wrist. Finally, displays that can be rolled up may be used in televisions and eventually a tubular device with a retractable roll out display.
5. CONCLUSION
As the components and manufacturing processes of flexible electronics mature, the concept of flexible flat panel display will eventually become a reality. Flexible displays offer tremendous advantages over conventional flat panel displays, like light weight, durability, low power consumption, portability etc. In particular, OLED displays offer bright sharp images at wide viewing angles and bright light, but are difficult to encapsulate. Although this field is growing and getting matured, it has been expanding rapidly and dynamically. The keys to success include grasping the tempo, building up a complete value chain and attracting the necessary entities to join the efforts and cooperate. LCD displays are already mature, but making the sandwich-structured device flexible is still
7 | P a g e ISSN (Online): 2582- 0974 Website: www.mejast.com
Middle East Journal of Applied Science & Technology (MEJAST)
(Peer Reviewed International Journal) Volume 3, Issue 1, Pages 05-09, January-March 2020 challenging. Once technical difficulties are overcome and roll to roll processing becomes feasible, flexible flat panel displays will widely commercialize and enter all of our lives.
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8 | P a g e ISSN (Online): 2582- 0974 Website: www.mejast.com
Middle East Journal of Applied Science & Technology (MEJAST)
(Peer Reviewed International Journal) Volume 3, Issue 1, Pages 05-09, January-March 2020
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