ISSN:1071-0922    

DOI:10.1889/1.1984866

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

ISSN:1071-0922    

DOI:10.1889/1.1984867

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—Ferroelectric LCDs have shown promise for use in high‐speed or highly multiplexed flat‐panel displays. Before ferroelectric liquid‐crystal technology could be implemented in practical devices, a number of significant problems had to be overcome. It is believed that all the remaining problems have now been removed, leaving the way open for large‐scale production of computer displays and the potential for larger devices to rival competing active‐matrix and supertwist display technologies. This paper will review the significant developments of FLCDs, illustrated by examples from both CRL and other l

ISSN:1071-0922    

DOI:10.1889/1.1984868

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—Different approaches were used to examine the possibility of using surface‐stabilized ferroelectric liquid‐crystals (SSFLCs) in video displays. The advantages of such displays lie in the viewing‐angle independence and the high switching speed. The large number of gray levels needed for video can, in principle, be obtained by digital or analog techniques. From simulation experiments on a high‐resolution CRT, it is estimated that for video, for the case of equidistant luminance levels, 128 levels for each primary colour are needed. Discrete gradation by means of bi‐level subpixels (spatial dither) is simulated for projection and direct‐view displays. Efficient subpixelation (minimum number of extra connections) results in perceptual artefacts when the three primary colours (RGB) are projected onto each other, as in a projection system. In the case of a direct‐view display with mosaic colour filter, the layout of this mosaic turns out to be more important than subpixelation. Analog gradation methods are based on in‐pixel domain switching effect. They require accurate control of the multidomain structures. Active‐matrix addressing for the SSFLC strongly enhances the reproducibility of the multidomain gray levels via the charge‐control process. This is demonstrated on test displays. Passive‐matrix addressing takes advantage of the bistability and switching speed of the SSFLC effect. One approach to control the multidomain gray levels in passive‐matrix addressing is the “texture method,” which is based on a distribution of the threshold voltage for switching within each pixel. The mechanism, the addressing scheme, the obtainable contrast in the different textures, the applicability of various FLC mixtures, and the resulting temperature sensitivity are discussed. The performance of test displays, operating at video rate, is evaluated. Several issues, such as temperature sensitivity, texture stability, and hysteresis in the transmission‐voltage cu

ISSN:1071-0922    

DOI:10.1889/1.1984869

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—The mass production of surface‐stabilized ferroelectric liquid‐crystal (SSFLCD) displays has been an elusive goal for several years. In this paper, some of the effects that structural and process variations in the alignment polymer can have in an SSFLC cell are considered. From the examples given here and in previous work, the general requirements for the design of alignment layers used in SSFLC devices are out

ISSN:1071-0922    

DOI:10.1889/1.1984870

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—The influence of the spontaneous polarization of liquid‐crystal materials and polyimide surface treatments on layer tilt angle in surface‐stabilized ferroelectric liquid‐crystal (SSFLC) cells has been studied by x‐ray diffraction. For the case of liquid‐crystal molecules with the same core structure, the layer tilt angle is not influenced by the magnitude of the spontaneous polarization of the liquid crystals (Ps). Three kinds of polyimides which result in different pre‐tilt angles for the typical nematic material result in the same layer tilt angle for the ferroelectric liquid‐crystal materials. The layer tilt angle vs. molecular tilt angle characteristics are expressed by a universal straight line and its slope is

ISSN:1071-0922    

DOI:10.1889/1.1984871

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—New chiral γ‐lactone compounds were developed as chiral dopants for ferroelectric liquid‐crystal (FLC) mixtures. They were found to induce fast response times when they were doped into achiral liquid‐crystal host mixtures. In addition, the effect of the molecular structure on the melting point and the helical twist properties in the nematic phase were investigated. Some FLC mixtures and their applications to FLC devices are d

ISSN:1071-0922    

DOI:10.1889/1.1984872

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—A6‐in.‐diagonal multicolor antiferroelectric liquid‐crystal display (AFLC) with 200 × (320 × 3) color pixels has been developed. To obtain high contrast and high‐multiplex driving, newly synthesized AFLC materials which show fast response and a good hysteresis loop were mixed into the main component. A new driving scheme, including a reset time in addition to the line time, w

ISSN:1071-0922    

DOI:10.1889/1.1984873

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—Large‐area (12 × 100 cm) flexible displays were successfully fabricated using ferroelectric liquid‐crystalline polymers (FLCPs). The polymers were comb‐shaped and had side chains which consisted of a flexible spacer unit, a rigid core moiety, and an optically active end‐group. These displays are lightweight and durable against mechan

ISSN:1071-0922    

DOI:10.1889/1.1984874

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Abstract—Innovations affect the lives of many people, whereas inventions, although important, are chiefly felt by specialists. Graceful growth is a path by which an innovation becomes successful in the marketplace. Lifetime employment, as practiced in Japan, can encourage both innovation and graceful growth. A multi‐layered hierarchical structure can inhibit innovation and graceful growth. Multiple formal presentations can impair the vitality of an organization. The growth of LCD technology is an example of graceful growth; the story of Asahi'sSuper Drybeer is an illustration of the virtues of lifetime‐employment pol

ISSN:1071-0922    

DOI:10.1889/1.1984875

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY