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Display Technology, Journal of

Issue 1 • Date March 2006

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Displaying Results 1 - 19 of 19
  • [Front cover]

    Publication Year: 2006 , Page(s): c1
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  • Journal of Display Technology publication information

    Publication Year: 2006 , Page(s): c2
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  • Table of contents

    Publication Year: 2006 , Page(s): 1
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  • Analytical solutions for uniaxial-film-compensated wide-view liquid crystal displays

    Publication Year: 2006 , Page(s): 2 - 20
    Cited by:  Papers (48)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1040 KB)  

    The uniaxial-film-compensated wide-view liquid crystal displays, with initially homogeneous alignment and vertical alignment, are analyzed. For each compensation scheme, the analytical solutions with the illustration of Poincare sphere representation are derived. Based on the analytical solutions, the 100:1 iso-contrast contours at any viewing angle can be easily achieved for most of the compensation schemes. View full abstract»

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  • IPS-LCD using a glass substrate and an anisotropic polymer film

    Publication Year: 2006 , Page(s): 21 - 25
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1824 KB)  

    A lightweight in-plane-switching liquid crystal display (IPS-LCD) using a single glass substrate and an anisotropic polymeric film is demonstrated. The liquid crystal molecules are aligned by the elongated polymer grain of the film. The alignment capability of the anisotropic film is comparable to a buffed polyimide layer. Compared to the LCD using two glass substrates, our new device exhibits a comparable contrast ratio (∼514:1), driving voltage, and response time because of good LC alignment. Such an anisotropic film can also function as a phase compensation film for widening the viewing angle. This technology is particularly attractive for making single-substrate displays and also has potential for a double-layered guest-host display and a flexible display using IPS LCDs. View full abstract»

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  • Characteristic parameters of liquid crystal cells and their measurements

    Publication Year: 2006 , Page(s): 26 - 31
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    The concept of equivalent characteristic parameters of a liquid crystal (LC) cell is introduced together with the characteristic circle and the characteristic ellipse. They are all related to the twist angle and retardation of the LC cell. Such equivalent characteristic parameters can provide a framework for analyzing LC modes, as well as providing a means to measure LC cell parameters. A new Stokes parameter method is also introduced to measure these characteristic parameters. Thus the twist angle and retardation of the LC cell can be determined accurately. View full abstract»

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  • Flexible bistable cholesteric reflective displays

    Publication Year: 2006 , Page(s): 32 - 37
    Cited by:  Papers (21)
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    Cholesteric liquid crystals (ChLCs) exhibit two stable states at zero field condition - the reflecting planar state and the nonreflecting focal conic state. ChLCs are an excellent candidate for inexpensive and rugged electronic books and papers. This paper will review the display cell structure, materials and drive schemes for flexible bistable cholesteric (Ch) reflective displays. View full abstract»

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  • POLICRYPS switchable holographic grating: a promising grating electro-optical pixel for high resolution display application

    Publication Year: 2006 , Page(s): 38 - 51
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4280 KB) |  | HTML iconHTML  

    POLICRYPS, an acronym of POlymer LIquid CRYstal Polymer Slices, is a structure made of perfectly aligned liquid crystal films separated by slices of almost pure polymer. Under suitable experimental and geometrical conditions, the structure is obtained by curing a homogeneous syrup of liquid crystal, monomer and curing agent molecules with a spatially modulated pattern of ultraviolet (UV) radiation. From an optical point of view, POLICRYPS is a holographic diffraction grating with a spatial periodicity that can be easily made of sub-micrometric scale, exhibiting diffraction efficiency values as high as 98%. Depending on the used geometry, the POLICRYPS grating can be utilized both in transmission or reflection, with negligible scattering losses, and can be switched ON and OFF by application of an external electric field of the order of few V/μm. In this paper, we review: 1) the "recipe" to fabricate POLICRYPS holographic gratings, along with their main optical and electro-optical properties; 2) a chemical-diffusive model that, taking into account sample temperature and intensity of the curing radiation, indicates the best conditions to fabricate these gratings; 3) a Kogelnik-like model that accounts for the dependence of the diffraction efficiency on material parameters, sample temperature, and applied electric field. Finally, we discuss the possibility of utilizing a micrometric sized POLICRYPS grating as a Grating Electro-Optical Pixel for high resolution display application. View full abstract»

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  • Device and circuit level optimization for high performance a-Si:H TFT-based AMOLED displays

    Publication Year: 2006 , Page(s): 52 - 59
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB)  

    Active matrix organic light-emitting diode (AMOLED) displays with amorphous hydrogenated silicon (a-Si:H) thin-film transistor (TFT) backplanes are becoming the state of art in display technology. Though a-Si:H TFTs suffer from an intrinsic device instability, which inturn leads to an instability in pixel brightness, there have been many pixel driving methods that have been introduced to counter this. However, there are issues with these circuits which limit their applicability in terms of speed and resolution. This paper highlights these issues and provides detailed design considerations for the choice of pixel driver circuits in general. In particular, we discuss the circuit and device level optimization of the pixel driver circuit in a-Si:H TFT AMOLED, displays for high gray scale accuracy, subject to constraints of power consumption, and temporal and spatial resolution. View full abstract»

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  • Effect of dual coplanar electrodes on Mercury-free flat fluorescent lamps for liquid crystal display

    Publication Year: 2006 , Page(s): 60 - 67
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3176 KB)  

    The effects of dual coplanar electrodes on a Hg-free flat fluorescent lamp were studied. For a dual coplanar lamp, brightness and efficacy were improved by 80% compared to a conventional coplanar lamp. The improvement is regarded as the result of reduced diffusion loss and the effective usage of the discharge volume in the dual coplanar lamps. An efficacy of 35.9 lm/w (14900 cd/m2) was achieved for 250 torr of a Xe(30%)/Ne(70%) gas mixture, by a 20-kHz ac pulse driving. View full abstract»

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  • Review of the properties of up-conversion phosphors for new emissive displays

    Publication Year: 2006 , Page(s): 68 - 78
    Cited by:  Papers (48)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1152 KB) |  | HTML iconHTML  

    In this paper, we review the properties of up-conversion (UC) materials and assess their potential for a new display technology. UC materials absorb near infrared light and re-emit in the visible. Some of their most appealing characteristics for displays are: a wide color gamut with very saturated colors, very high brightness operation without damage to the emitters, long lifetimes and efficiencies comparable to those of existing technologies. Other advantages include simplicity of fabrication, versatility of operation modes, and the potential for greatly reduced display weight and depth. View full abstract»

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  • Removal of hot spot speckle on rear projection screen using the rotating screen system

    Publication Year: 2006 , Page(s): 79 - 84
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3864 KB) |  | HTML iconHTML  

    This paper investigates a method to remove hot spot speckle, which is produced by laser-long coherence, on a projection screen. The objective of the work has been to first create an image from a digital light processing (DLP) display system using an RGB laser source. We then successfully obtained a high-quality image with speckle contrast, which is less than 2% when the screen was rotated by piezoelectric motor. View full abstract»

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  • High performance de-interlacing algorithm for digital television displays

    Publication Year: 2006 , Page(s): 85 - 90
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (400 KB) |  | HTML iconHTML  

    In this paper, a high performance de-interlacing algorithm is proposed to reduce the artifact effects produced by interlaced scanning TV systems. In the proposed algorithm, a moving-stationary detector is presented to determine where the missing pixels belong to moving or stationary region. If the missing pixel belongs to the stationary region, the temporal-wise interpolation is adopted; otherwise, the spatial-temporal-wise interpolation is applied. In addition, the proposed algorithm has simple operations chiefly involves addition and subtraction. This simple computation conducts the proposed algorithm to real-time applications efficiently. Experimental results show that the proposed algorithm can improve the subjective and objective qualities compared with other de-interlacing algorithms. View full abstract»

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  • Activation process-dependent characteristics of novel thermionic oxide cathodes for CRT application

    Publication Year: 2006 , Page(s): 91 - 97
    Cited by:  Papers (2)
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    The emission and conductivity characteristics of oxide cathodes depend largely on the activation process. In this paper, the electrical properties of new type of oxide cathodes for cathode ray tube (CRT) application, supplied by LG Philips Displays, have been investigated in relation to different cathode activation regimes. The influence of the activation process over different durations has been investigated. A temperature of T=1425 K was chosen to be higher than the optimum cathode activation temperature (T=1200 K), and the other temperature of T=1125 K was lower than that. The electron activation energy (E) was found to vary in the range from 0.58 to 2.28 eV for cathodes activated at the higher temperature regime, and from 1.08 to 1.9 eV for those activated at the lower temperature regime. Scanning electron microscopy (SEM) and electron diffraction X-ray (EDX) analyses show a structural phase transformation in the oxide material that was activated at 1125 K for a period of 1-12 hours. The SEM mapping shows a large contamination of Ba in the top layer of oxide material. The activator agents tungsten and aluminum are found to penetrate into the BaO/SrO layer in two different ways. View full abstract»

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  • Corrections to “Sparse Orthogonal Matrices for Scanning Liquid Crystal Displays”

    Publication Year: 2006 , Page(s): 98
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  • Call for papers on progress in solid-state, fiber, and tunable sources

    Publication Year: 2006 , Page(s): 99
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  • Special issue on intelligent sensors

    Publication Year: 2006 , Page(s): 100
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  • Journal of Display Technology Information for authors

    Publication Year: 2006 , Page(s): c3
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  • [Blank page]

    Publication Year: 2006 , Page(s): c4
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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.