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Display Technology, Journal of

Issue 9 • Date Sept. 2012

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Displaying Results 1 - 16 of 16
  • [Front cover]

    Publication Year: 2012 , Page(s): C1
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  • Journal of Display Technology publication information

    Publication Year: 2012 , Page(s): C2
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  • Table of contents

    Publication Year: 2012 , Page(s): 493
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  • [Blank page]

    Publication Year: 2012 , Page(s): 494
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  • Guest Editorial

    Publication Year: 2012 , Page(s): 495
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  • High-Resolution Multi-View Projection Display With a Quantized-Diffusion-Angle Screen

    Publication Year: 2012 , Page(s): 496 - 504
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2507 KB) |  | HTML iconHTML  

    In this paper, we have devised a novel projection screen using a double-sided lenticular lens with a diffusion angle range quantized by the incident light angle and a constant diffusion light intensity, independent of the angle of the incident light. We developed high-resolution multi-view projection display using a novel projection screen and multiple projectors. Our display system has the advantage of making it easy to align multiple projectors, and the capability of simultaneously projecting multiple different images at different viewing angles at any distance from the projection screen. View full abstract»

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  • Optimization of Size of Pixel Blocks for Orthogonal Transform in Optical Watermarking Technique

    Publication Year: 2012 , Page(s): 505 - 510
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3770 KB) |  | HTML iconHTML  

    We previously proposed a novel technology with which the images of real objects with no copyright protection could contain invisible digital watermarking, using spatially modulated illumination. In this “optical watermarking” technology, we used orthogonal transforms, such as a discrete cosine transform (DCT) or a Walsh-Hadamard transform (WHT), to produce watermarked images, where 1-b binary information was embedded into each pixel block. In this paper, we propose an optimal condition for a technique of robust optical watermarking that varies the size of pixel blocks by using a trade-off in the efficiency of embedded watermarking. We conducted experiments where 4 × 4, 8 × 8, and 16 × 16 pixels were used in one block. A detection accuracy of 100% was obtained by using a block with 16 × 16 pixels when embedded watermarking was extremely weak, although the accuracy did not necessarily reach 100% by using blocks with 4 × 4 or 8 × 8 pixels under the same embedding conditions. We also examined the effectiveness of using a Haar discrete wavelet transform (Haar DWT) as an orthogonal transform under the same experimental condition, and the results showed that the accuracy of detection was slightly inferior to DCT and WHT under very weak embedding conditions. The results from experiments revealed the effectiveness of our new proposal. View full abstract»

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  • Video Conference 3D Display That Fuses Images to Replicate Gaze Direction

    Publication Year: 2012 , Page(s): 511 - 520
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2141 KB) |  | HTML iconHTML  

    We propose a new video conference display that replicates the eye contact back channel information available to the attendees of actual conferences. The display consists of multiple screens that present remote participants' faces so as to show their gaze direction, i.e., the direction in which they are looking. We introduce a prototype video conference terminal with two screens and demonstrate that it offers eye contact with directivity of up to 17 deg. In addition, the screens replicate the participants' gaze direction from the relative positions of the face and eyes. View full abstract»

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  • Cost-Effective Driving System Based on Switching Scan IC for AC Plasma Display Panels

    Publication Year: 2012 , Page(s): 521 - 528
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2019 KB) |  | HTML iconHTML  

    A low-cost driving system for plasma display panels (PDPs) is proposed from standpoints of the entire driver. The proposed driving system is developed with no path switches, based on the series connection of the ramp-generating switches with the sustain circuit. In addition, the proposed driver is arranged in such a way that the scan integrated circuits (ICs) can be utilized with switching operation during sustain periods. The operation of the switching scan ICs results in a simplified sustain circuit with low-cost and low-voltage-rating circuit components. Since the proposed driver is designed by circuit devices with low voltage rating, it can take advantages of semiconductor devices with reduced conduction and switching losses as well as cost effectiveness. Furthermore, the developed driving system requires no power supply assigned to the bias circuit, and parts of the sustain circuit can be used for the bias circuit as well. As a result, the PDP driving system presented in this paper can feature low-cost structure, reduced number of switching devices, smaller size, and high efficiency. View full abstract»

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  • Resolution Analysis of N -Ocular Imaging Systems With Tilted Image Sensors

    Publication Year: 2012 , Page(s): 529 - 533
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (815 KB) |  | HTML iconHTML  

    In this paper, we present an N-ocular imaging system with tilted image sensors to improve the depth resolution for objects under fixed system resource constraints. A nonplanar arrangement of image sensors enables one to improve the system performance due to the increase in the common field of view (FOV). We analyze the depth resolution based on the two point sources resolution criterion as a function of sensing parameters such as the number of cameras, the number of pixels, parallax, pixel size, and focal length. We carry out Monte Carlo simulations in the analysis. The results indicate that the proposed method may improve the common FOV zone and thus provide improved depth resolution for N -ocular imaging system when the objects are not very far from the sensors. View full abstract»

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  • Color Realization of Reflective Electronic Display Using Particle-Moving Method

    Publication Year: 2012 , Page(s): 534 - 538
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (697 KB) |  | HTML iconHTML  

    We propose a color realization method of a reflective display based on quick response-liquid powder display (QR-LPD). We use the particle-moving method in order to address the color particles cyan, magenta, yellow, and black (CMYK) into their respective cells. We fabricated a color addressed reflective display panel using indium-tin-oxide (ITO) glass with a rib width of 15 μm, a cell size of 300 μm × 300 μm, an average particle diameter of 8 μm, and a particle charge to mass ratio (q/m) from +8.5 μC/g to -4 μC/g. Most particles are inserted into their cells on the upper substrate, with non-movable particles removed in a previous step. The fabricated color panel shows a well-addressed CMYK array in microscopic photographs. An additional color display is fabricated using line-by-line addressing in order to facilitate the addressing process. View full abstract»

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  • Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator

    Publication Year: 2012 , Page(s): 539 - 545
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (899 KB) |  | HTML iconHTML  

    In contrast to the mechanical scanning procedure described in the standard ISO/DIS 11146, the use of electronically tunable focal length lenses has proved its capability for the measurement of the laser beam propagation factor (M2) without moving components. Here, we demonstrate a novel experimental implementation where we use a low-cost programmable liquid crystal spatial light modulator (SLM) for sequentially codifying a set of lenses with different focal lengths. The use of this kind of modulators introduces some benefits such as the possibility for high numerical aperture or local beam control of the phase of the lenses which allows for minimizing systematic errors originated by lens aberrations. The beamwidth, according to the second-order moment of the irradiance, is determined for each focal length by using a digital sensor at a fixed position with respect to the spatial light modulator. After fitting the measured data to the theoretical focusing behavior of a real laser beam, the beam propagation factor is obtained. We successfully validated the results in the laboratory where a full digital control of the measurement procedure without mechanical scanning was demonstrated. View full abstract»

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  • Visualization of Viewing Zones Formed in a Contact-Type Multiview 3D Imaging System

    Publication Year: 2012 , Page(s): 546 - 551
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1272 KB) |  | HTML iconHTML  

    The light intensity distribution in front space of the display panel in the contact-type multiview 3D imaging systems is measured to visualize viewing zone characteristics of the systems. It allows comparing visually the optical characteristics of two possible optical configurations such as radial and parallel in the systems. The distribution insure that the light field from each pixel cell is mixed with those from other pixel cells as a consequence no images viewed at different areas of the viewing zone have the same pixel compositions as others. It also reveals that the light field for the parallel configuration has almost the same characteristics as that for either side along the parallel plane to the display panel, which is at the viewing distance of the radial configuration. View full abstract»

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  • Special issue on Green Technology

    Publication Year: 2012 , Page(s): 552
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  • Journal of Display Technology information for authors

    Publication Year: 2012 , Page(s): C3
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  • [Blank page - back cover]

    Publication Year: 2012 , 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.