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IBM Journal of Research and Development

Issue 1 • Date Jan. 1992

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Displaying Results 1 - 12 of 12
  • Preface

    Publication Year: 1992 , Page(s): 2
    Click to expandAbstract | PDF file iconPDF (122 KB)  

    This special issue of the IBM Journal of Research and Development marks the advent of an important new core technology for IBM. More than seven years ago we beganto focus on the technologies required for compact, lightweight, portable personal computers and terminals. While the path to meeting requirements in major areas such as processor and memory technology and storage was reasonably clear, the... View full abstract»

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  • Thin-film-transistor/liquid crystal display technology—An introduction

    Publication Year: 1992 , Page(s): 3 - 10
    Cited by:  Papers (4)  |  Patents (2)
    Click to expandAbstract | PDF file iconPDF (658 KB)  

    Liquid crystals are simple and very efficient electro-optic transducers, or light valves. Thin-film transistors are simple electronic control devices which can be fabricated on large transparent substrates. These two technologies, when combined, allow the fabrication of electronic displays which challenge the dominance of the cathode ray tube (CRT). This paper reviews the history of this important... View full abstract»

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  • A gray-scale addressing technique for thin-film-transistor/liquid crystal displays

    Publication Year: 1992 , Page(s): 11 - 22
    Cited by:  Patents (35)
    Click to expandAbstract | PDF file iconPDF (938 KB)  

    An addressing technique allowing continuous-tone color images to be rendered on thin-film-transistor/liquid crystal displays having bilevel drivers is described. The technique uses multiple subfields per frame, with driver voltages changed synchronously with the field data. By using N bits of data per pixel, excitation is applied to the display one bit-plane per field for N consecutive fields. The... View full abstract»

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  • Cell design of gray-scale thin-film-transistor-driven liquid crystal displays

    Publication Year: 1992 , Page(s): 23 - 42
    Click to expandAbstract | PDF file iconPDF (1147 KB)  

    The desirable liquid crystal (LC) panel design (here called “cell design”) for a gray-scale thin-film-transistor (TFT)-driven twisted nematic (TN) liquid crystal display (LCD) is discussed in terms of display legibility and ease of fabrication. To optimize cell design for gray-scale application, some key display factors such as contrast ratio, color change, and viewing cone are evalu... View full abstract»

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  • Color filter for 10.4-in.-diagonal 4096-color thin-film-transistor liquid crystal displays

    Publication Year: 1992 , Page(s): 43 - 50
    Cited by:  Papers (1)  |  Patents (4)
    Click to expandAbstract | PDF file iconPDF (632 KB)  

    Color filters with a wide color reproduction gamut and high transmittance were developed for 10.4-in.-diagonal 4096-color thin-film-transistor liquid crystal displays using pigment-dispersed photosensitive polymers. The transmission spectrum of each color pixel was designed in conjunction with other components such as backlight and polarizers in order to meet front-of-screen quality requirements. ... View full abstract»

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  • Lateral field effect in twisted nematic cells

    Publication Year: 1992 , Page(s): 51 - 58
    Cited by:  Papers (4)  |  Patents (4)
    Click to expandAbstract | PDF file iconPDF (720 KB)  

    The lateral field existing in the ON state of a liquid crystal display (LCD) can result in an undesired reverse tilt domain in each pixel, thereby leading to poor contrast ratio of the display. As pixel size becomes smaller to meet the requirements of a high-information-content display, the problem becomes worse. In this paper, we present experimental results and theoretical analysis of the latera... View full abstract»

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  • Functional testing of TFT/LCD arrays

    Publication Year: 1992 , Page(s): 59 - 68
    Cited by:  Papers (4)  |  Patents (8)
    Click to expandAbstract | PDF file iconPDF (810 KB)  

    The thin-film-transistor liquid crystal display (TFT/LCD) is emerging as the leading flat-panel display in computer applications. TFT array characterization is important to the research, development, and manufacturing of TFT/LCDs. This paper describes a new Dynamic Array Tester developed for that purpose and describes some examples of its use. View full abstract»

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  • Reactive ion etching technology in thin-film-transistor processing

    Publication Year: 1992 , Page(s): 69 - 75
    Cited by:  Papers (1)  |  Patents (4)
    Click to expandAbstract | PDF file iconPDF (656 KB)  

    This paper discusses reactive ion etching (RIE) process issues in preparing thin-film transistors (TFTs) for liquid crystal displays (LCDs). Three areas were examined in detail: gate metal etch, dielectric etch, and a-Si:H etch, both intrinsic and n+ doped. Although there are different requirements for each step, the basic principles for the etching process are similar. For example, eac... View full abstract»

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  • Study of the Vth shift of the thin-film transistor by the bias temperature stress test

    Publication Year: 1992 , Page(s): 76 - 82
    Cited by:  Papers (2)  |  Patents (2)
    Click to expandAbstract | PDF file iconPDF (520 KB)  

    Amorphous silicon thin-film transistors (a-Si:H TFTs) are now widely used as the switching device in the active-matrix addressing of liquid crystal displays. One concern is the potential instability problems associated with the threshold voltage (Vth) shifts to higher values after prolonged operating times. The reason for this Vth shift has been widely discussed, and two mode... View full abstract»

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  • TDI charge-coupled devices: Design and applications

    Publication Year: 1992 , Page(s): 83 - 106
    Cited by:  Papers (14)  |  Patents (6)
    Click to expandAbstract | PDF file iconPDF (1832 KB)  

    The design and applications of charge-coupled devices (CCDs) operated in the time-delay-and-integration (TDI) mode are reviewed. Design issues regarding the use of the TDI-CCD imager for visible imaging applications are discussed. Aspects pertaining to its parallel array, serial-to-parallel interface, serial register, modulation transfer function (MTF), discrete charge motion, motion synchronizati... View full abstract»

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  • Recent publications by IBM authors

    Publication Year: 1992 , Page(s): 107 - 127
    Click to expandAbstract | PDF file iconPDF (1788 KB)  

    The information listed here is supplied by the Institute for Scientific Information and other outside sources. Reprints of the papers may be obtained by writing directly to the first author cited. Information on books may be obtained by writing to the publisher. Journals and books are listed alphabetically by title; papers are listed sequentially for each journal View full abstract»

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  • Recent IBM patents

    Publication Year: 1992 , Page(s): 128 - 136
    PDF file iconPDF (640 KB)  
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center