By Topic

Display Technology, Journal of

Issue 7 • Date July 2012

Filter Results

Displaying Results 1 - 18 of 18
  • [Front cover]

    Publication Year: 2012 , Page(s): C1
    Save to Project icon | Request Permissions | PDF file iconPDF (399 KB)  
    Freely Available from IEEE
  • Journal of Display Technology publication information

    Publication Year: 2012 , Page(s): C2
    Save to Project icon | Request Permissions | PDF file iconPDF (35 KB)  
    Freely Available from IEEE
  • Table of contents

    Publication Year: 2012 , Page(s): 369 - 370
    Save to Project icon | Request Permissions | PDF file iconPDF (41 KB)  
    Freely Available from IEEE
  • The Inventors of LCD Receive the 2012 National Academy of Engineering Award

    Publication Year: 2012 , Page(s): 371
    Save to Project icon | Request Permissions | PDF file iconPDF (214 KB)  
    Freely Available from IEEE
  • Guest Editorial

    Publication Year: 2012 , Page(s): 372
    Save to Project icon | Request Permissions | PDF file iconPDF (80 KB)  
    Freely Available from IEEE
  • Reduced Graphene Oxide-ZnO Nanocomposites for Flexible Supercapacitors

    Publication Year: 2012 , Page(s): 373 - 376
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (971 KB) |  | HTML iconHTML  

    In this paper, we present a novel nanostructure of reduced graphene oxide supported by vertical aligned ZnO nanorods for flexible supercapacitors. Layer-by-layer strategies are adopted to fabricate the electrodes on PET flexible substrates. Cu foil, Al-doped ZnO film and chemical-vapor deposition graphene is introduced on PET to serve as current collectors. ZnO nanorods are synthesized by a hydrothermal method under low temperature. The structural and electrochemical properties of these nanostructured electrodes are systematically investigated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Stability of Interdigitated Microelectrodes of Flexible Chemiresistor Sensors

    Publication Year: 2012 , Page(s): 377 - 384
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3233 KB) |  | HTML iconHTML  

    One of the main challenges in flexible sensors is their performance degradation under different environmental conditions. In this work, high cycle bending fatigue experiments were conducted on a flexible sensor array deposited on a Polyethylene Terephthalate (PET) substrate. These sensors were designed and fabricated for detecting different types of chemical vapors. Molecularly-mediated thin film assemblies of gold nanoparticles were deposited on interdigitated microelectrodes with different line widths and spaces. The behavior of the sensor array was studied under repeated mechanical and thermal loadings. This work focuses on studying the failure modes when such devices are subjected to bending fatigue stresses, high temperature, and high humidity environments. The initial results showed that these devices were very stable under mechanical, thermal, and environmental loadings. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Stability of ITO Thin Film on Flexible Substrate Under Thermal Aging and Thermal Cycling Conditions

    Publication Year: 2012 , Page(s): 385 - 390
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1194 KB) |  | HTML iconHTML  

    Indium-tin-oxide (ITO) is a transparent conductive thin film that is widely used as a top conducive layer in photovoltaic solar cells. However, ITO is sensitive to environmental conditions and the electrical conductivity degrades as a consequence of harsh environmental conditions. Furthermore, the thermal expansion coefficient mismatch between the ITO film and the substrate creates stress/strain on the film when the package is subjected to fluctuating temperatures. This could create micro-cracks and consequently damage the film. Therefore, this study was designed to study the effect of the thermal cycling and thermal aging on the ITO thin films to simulate the effect of continuous high temperatures and fluctuating temperatures that may be applied on the thin films during the usage. In this study, two sets of experiments were conducted on a 60Ω/□square sputter-deposited ITO on 127 μm heat stabilized Poly Ethylene Terephthalate (PET) substrate. The first set of experiments contained four samples which were thermally aged at 100°C for 30 days and the other set of experiments contained another four samples which were thermally cycled for 900 cycles. The thermal profile consisted of a high temperature of 100°C, a low temperature of 0°C, dwell time of 10 minutes, and ramp rate of 10°C/min , as depicted in Fig. 1. The initial results showed that the ITO thin film is not stable in the thermal aging experiment and the electrical resistivity gradually increased for all samples until the end of the 30 days. The degradation happened during the thermal cycling as well. However, SEM images show that the morphology of the ITO surface is stable under both conditions. Energy-dispersive X-ray (EDX) spectroscopy analysis showed stability in the ITO thin film in terms of composition. XRD spectra confirmed the improved crystallinity for the thermally aged films, which corresponded to the- increased transmission in the visible region. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Gravure Printing of ITO Transparent Electrodes for Applications in Flexible Electronics

    Publication Year: 2012 , Page(s): 391 - 396
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2342 KB) |  | HTML iconHTML  

    The possibility to directly pattern indium-tin-oxide (ITO) layers at ambient conditions by printing has many benefits. Printing, being an additive process, would greatly reduce the amount of energy, labor and material used by the current manufacturing processes to deposit and pattern ITO. In this work, gravure printability of ITO nanoparticles on polyethylene terephthalate (PET) was studied. A wide range of sheet resistivites and film thicknesses was obtained by varying the specifications of the gravure cells. From the regression analysis of the results, a good estimation of sheet resistivity of the printed films at different gravure cell volumes and aspect ratios (AR) was achieved. The films also showed transparency above 95% in the visible light region. In addition, printed ITO films were assessed for mechanical flexibility and the results compared to commercially available sputtered ITO films on PET. The electrical performance of printed ITO layers was not deteriorated with bending in contrast to the sputtered films. Therefore, printed ITO films can be of great benefit for applications in flexible electronics such as organic photovoltaics (OPV), liquid crystal displays (LCD), organic light-emitting diodes (OLED), touch screens, biosensors and utilization in the field of energy efficiency, especially in buildings. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Autostereoscopic 3D Projection Display Based on a Lenticular Sheet and a Parallax Barrier

    Publication Year: 2012 , Page(s): 397 - 400
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (621 KB) |  | HTML iconHTML  

    Three-dimensional (3D) projection display is an effective approach to realize large size 3D images with high resolution. An autostereoscopic 3D projection display is proposed. It consists of four projectors, a projection screen, a lenticular sheet and a parallax barrier. Operation principle and calculation equations are described in details and the parallax images are corrected by the means of homography. A 50-inch autostereoscopic 3D projection display prototype is developed and it presents good stereoscopic images. The normalized luminance distributions of the viewing zones are measured, and the results agree well with the designed values. Compared with the conventional autostereoscopic 3D projection display based on two parallax barriers, the proposed prototype has much higher brightness. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Pico Projection System With Electrically Tunable Optical Zoom Ratio Adopting Two Liquid Crystal Lenses

    Publication Year: 2012 , Page(s): 401 - 404
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (517 KB) |  | HTML iconHTML  

    A pico projection system with electrically tunable optical zoom ratio adopting two liquid crystal (LC) lenses is first demonstrated. The projected image of the system is not only continuously focused, but also zoomed simultaneously by adjusting the focal lengths of LC lenses electrically. The related optical principle is discussed and a liquid-crystal-on-silicon (LCOS)-based pico projection system was used to demonstrate the designed concept. This study opens a new window in realizing pico projectors with electrically tunable optical zooms. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Anchoring Graph Cuts Towards Accurate Depth Estimation in Integral Images

    Publication Year: 2012 , Page(s): 405 - 417
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1467 KB) |  | HTML iconHTML  

    Integral imaging is a three-dimensional (3D) imaging technique that allows the displaying of full color images with continuous parallax. Its commercial potential has been increased, due to its ability of presenting to the viewers smooth 3D images, with full parallax, in a wide viewing zone. Being able to extract the inherent 3D information from the planar integral images and produce 3D reconstructions, offers advantages in various applications of immersive entertainment and communications. On this scope, this paper addresses the problem of accurate depth estimation in integral images. The proposed method, relying on the assumption that a pixel is the projection of a 3D imaging ray, aims to specify the first intersection of each pixel's projection ray with the 3D scene in order to assign to it the corresponding depth value. This task is formulated as an energy optimization problem and the graph cuts approach is utilized to solve it. The energy term is twofold; its first part aims to restrict the desired solution to be close to the observed data, i.e., the integral image, while the second one enforces regional smoothness in the depth estimation. This combination offers an accurate and spatially smooth scene structure. The novelty of the paper lies on the framework's formulation as one single optimization procedure and on the way that this optimization is constrained by a set of reliably estimated 3D surface points, called the “anchor points”. Anchoring the optimization results in enhanced depth estimation accuracy, while decreasing the optimization processing burden. The proposed algorithm is evaluated in both synthetic and real integral images consisting of complicated object scenes. A comparison against other state-of-the-art algorithms proves the superiority of the proposed method in terms of depth estimation accuracy. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Edge Contrast Failure Analysis on Vision Angle of Human Eyes for Curve Displays

    Publication Year: 2012 , Page(s): 418 - 423
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (681 KB) |  | HTML iconHTML  

    For curve displays, the purpose of this study is to present edge contrast failure analysis (ECFA) method on the vision angle of human eyes. In order to analyze edge contrast of curve display images, a flexible cholesteric liquid crystal display is bent for different radii of curvature by using a flexible-characteristic inspection system. To simulate the human eye factors, a charge-coupled device colorimeter is utilized based on ECFA to analyze a maximum vision angle of human eyes with respect to curve displays under different radii of curvature. According to analysis results, a designer or maker of curve displays can design large-vision-angle and comfortable curve-display products for human being. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Critical Fusion Frequency for Bright and Wide Field-of-View Image Display

    Publication Year: 2012 , Page(s): 424 - 429
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1663 KB) |  | HTML iconHTML  

    The use of bright and wide field-of-view (FOV) displays in future TV systems will enable us to enjoy TV programs with a rich sense of presence, i.e., a sense of “being there.” However, such displays can strongly stimulate human peripheral vision, which is sensitive to flicker. The recent widespread adoption of hold-type displays such as liquid crystal displays might circumvent the flicker problem in current TV systems. For temporal specification of future TV systems with bright and wide FOV displays, we measured the critical fusion frequency (CFF) in 26 participants, using varying luminance, duty ratios, and FOVs. We showed that CFF depended on the duty ratio and the FOV, and that more than 90 Hz was required to avoid flicker perception with wide FOV displays. Moreover, we demonstrated that flicker was regularly perceived in viewing wide FOV natural images presented at 60 Hz with a 50% duty ratio. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • [Blank page]

    Publication Year: 2012 , Page(s): 430
    Save to Project icon | Request Permissions | PDF file iconPDF (5 KB)  
    Freely Available from IEEE
  • Special issue on Green Technology

    Publication Year: 2012 , Page(s): 431
    Save to Project icon | Request Permissions | PDF file iconPDF (943 KB)  
    Freely Available from IEEE
  • Journal of Display Technology information for authors

    Publication Year: 2012 , Page(s): C3
    Save to Project icon | Request Permissions | PDF file iconPDF (31 KB)  
    Freely Available from IEEE
  • [Blank page - back cover]

    Publication Year: 2012 , Page(s): C4
    Save to Project icon | Request Permissions | PDF file iconPDF (5 KB)  
    Freely Available from IEEE

Aims & Scope

This publication covers the theory, design, fabrication, manufacturing and application of information displays and aspects of display technology.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Arokia Nathan
University of Cambridge
Cambridge, U.K.