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Display Technology, Journal of

Issue 7 • Date July 2010

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Displaying Results 1 - 12 of 12
  • [Front cover]

    Publication Year: 2010 , Page(s): C1
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  • Journal of Display Technology publication information

    Publication Year: 2010 , Page(s): C2
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  • Table of contents

    Publication Year: 2010 , Page(s): 245
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  • Blank page

    Publication Year: 2010 , Page(s): 246
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  • Power Recycling of Large-Area OLEDs Using Solar Cells

    Publication Year: 2010 , Page(s): 247 - 251
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (682 KB) |  | HTML iconHTML  

    We demonstrate that power recycling is feasible by merging a large-area (30 ×120 mm2) OLED panel and a solar cell into each other. The power recycling efficiency of 0.152% is achieved under the illumination of one side-emitting white OLED at 2450 cd/m2 when the conversion efficiency of a reference solar cell is 4% and the distance between the OLED and solar cell is 1.5 mm. We have found that the power recycling efficiency is decreased under high brightness due to a decrease in the power efficiency of OLED and a loss of current induced by the resistance of a transparent electrode. We have also shown that local heat generation of the large-area OLED panel would be an issue for power recycling. View full abstract»

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  • Solution-Processed Flexible ITO-Free Organic Light-Emitting Diodes Using Patterned Polymeric Anodes

    Publication Year: 2010 , Page(s): 252 - 256
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (533 KB) |  | HTML iconHTML  

    We discuss a thin-film spin-coating and patterning process of a conductive polymer electrode for flexible organic light-emitting diodes (OLEDs). For the polymeric anode, dimethylsulfoxide (DMSO)-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has been spin coated on a non-ionic surfactant layer that was pre-coated on the polyethersulfone (PES) substrate. A peel-off method has then been employed to pattern the conductive polymer anode without UV irradiation or heat treatment involved. A peel-off pattern is induced by different adhesion energy among a hydrophobic flexible substrate, a hydrophilic polymeric anode layer, and an adhesive film peeler that is in contact with the polymer anode. With this process technology, we have successfully fabricated solution-processed flexible green OLEDs, showing a peak luminescence of 6000 and a maximum current efficiency of 16.2 cd/A. View full abstract»

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  • 3D Integral Imaging Reconstruction of Occluded Objects Using Independent Component Analysis-Based K-Means Clustering

    Publication Year: 2010 , Page(s): 257 - 262
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (478 KB) |  | HTML iconHTML  

    We explore algorithms of independent component analysis and K-means applied to 3D reconstruction of occluded objects using integral imaging. 3D reconstruction of occluded objects is implemented using the elemental images of the separated objects from occlusion. Experimental and theoretical results are presented. We show that the 3D reconstructed images using the proposed method may perform better than those using the conventional method in terms of contrast, sharpness and average normalized rms error (RMSE) metrics. View full abstract»

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  • Dynamics and Electrooptics of Vertically Aligned Nematics With Induced Pretilt on {\hbox {SiO}}_{x}

    Publication Year: 2010 , Page(s): 263 - 268
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    The response time and contrast of vertically-aligned negative nematics depend critically on the aligning surface and its induced pretilt. Pretilt can be tuned up using obliquely evaporated inorganic oxides as alignment surface. A thorough study of pretilt angles induced by aligning surfaces of thermally evaporated SiO¿ has been carried out on several commercial and experimental negative nematic mixtures. Morphology of SiO¿ with different evaporation angles has been studied by Field Emission Scanning Electron Microscopy. Some morphological variations appear at specific evaporation angles. These are related to the pretilt induced by the surface and to the dynamic response of the device. View full abstract»

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  • A PDM-Based Digital Driving Technique Using Delta-Sigma ( \Delta \Sigma ) Modulation for QVGA Full-Color AMOLED Display Applications

    Publication Year: 2010 , Page(s): 269 - 278
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1867 KB) |  | HTML iconHTML  

    We propose a digital driving technique using pulse-density modulation (PDM) for an active-matrix organic light-emitting diode (AMOLED) to effectively suppress the false image contour in conventional pulsewidth modulation (PWM) while achieving considerably low operating frequency. A compact first-order digital ΔΣ modulator provides the PDM signal to the panel. A 2.2-inch QVGA AMOLED system using the proposed technique shows no false image contour problem while allowing relaxed minimum gate scan time. View full abstract»

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  • Easy Process and Performance Improvement for Top-Emission Organic Light-Emitting Diodes by Using UV Glue as the Insulation Layer on Copper Substrate

    Publication Year: 2010 , Page(s): 279 - 283
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (974 KB) |  | HTML iconHTML  

    A high heat dissipation material (copper, Cu) was employed as the substrate for top emission organic light-emitting diodes (TEOLEDs). The UV glue was spin-coated onto the Cu substrate as the insulation layer to effectively improve Cu surface roughness and reduce process complexity. From the optoelectronic results, the optimized device with the Cu substrate shows the maximum luminance of 14110 cd/m2 and luminance efficiency of 7.14 cd/A. The surface and junction temperatures are measured to discuss the heat-dissipating effect on device performance. From the results, TEOLED fabricated on a Cu substrate has lower junction (55.34°C) and surface (25.7°C) temperatures, with the lifetime extended seven times. We employed Cu foil as the substrate for flexible TEOLED with maximum luminance of 10310 cd/m2 and luminance efficiency of 7.3 cd/A obtained. View full abstract»

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  • IEEE copyright form

    Publication Year: 2010 , Page(s): 284 - 285
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  • Journal of Display Technology information for authors

    Publication Year: 2010 , Page(s): C3
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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.