A thin-film transistor for flat planel displays

This paper reports the measured results of a thin-film transistor (TFT) for the flat panel display application. The TFT has a double-gate structure and uses a very thin (80-100 Å) CdSe film as the semiconductor. The device has less than 10^-10-A zero-gate-bias leakage current and greater than 10⁶ON/OFF current ratio. It has been found that the only severe stability requirement on the device is in the OFF condition, Both dc and dynamic life tests have been made. The device performs better in the multiplexed condition than in the dc condition. Excellent maintenance of device parameters has been observed.     

蓝色磷光OLED可以改善平面显示器

有机发光器件(OLED)制造商,Universal Display公司(位于新泽西州的Ewing),和它的研究合作伙伴普林斯顿大学(位于新泽西州的Princeton),和南加州大学(位于加州的Los Angeles),成功地开发出来了蓝色磷光OLED。据称这是世界上第一次开发出效率比较高的蓝色磷光OLED。这种器件,与已经开发成功的红色,绿色磷光OLED器件一     

平板显示器件蓝光危害评估

近年来,随着互联网的高速发展以及各种智能设备(包括手机、平板和其他智能终端)的普及,人的各种器官,特别是眼睛和皮肤会越来越多的受到这些设备发出的光的照射.这些光对人的身体健康有什么影响？是当前的热门话题.这其中,蓝光危害是其中最热门的.媒体上有各种介绍蓝光危害的文章,市场上有很多蓝光防护的产品,但对于平板显示器件蓝光危害的定量化的分析和研究则相对较少,为此进行了专题研究.     

Technology development and production of flat panel displays inKorea

The Korean display industry, led by the Samsung and LG Group, has been investing more than 3 billion US dollars in the development and production of large bright high-definition liquid-crystal displays (LCDs) and plasma display panels (PDPs) using new fifth-generation substrate glass. Recent developments have been significant and wide-ranging, with brighter and longer life characteristics as well as improving the manufacturing process for lowered production cost. Samsung Electronics has developed the world's largest 40-in ultra-extended graphics adapter (UXGA) thin-film transistor (TFT) LCD panel for high-definition televisions and engineering workstations, while LG Electronics manufactured a brighter high-definitional 65-in wide UXGA PDPs competing with projection televisions for home theater. Since the first-stage National Research Project for developing TFT LCDs and PDPs was terminated in September 2001, the second-stage Advanced New Research Program for developing more wearable and reliable organic light-emitting diodes than conventional types are proposed by a group of research scientists and engineers working for novel display materials in academia and government-funded research institutes as well as display industries in 2002     

Sputter deposition of phosphors for electroluminescent flat panel displays

Thin film electroluminescent (TFEL) phosphors for flat panel displays have been produced by several different growth methods including atomic layer epitaxy, chemical vapor deposition, and sputter deposition. There is a great deal of interest in sputter deposition due to the extensive knowledge base and equipment from other existing thin film manufacturing. However, deposition of sulfide-based TFEL phosphors by conventional radio frequency magnetron sputtering has proven to be difficult due to the formation of negative sulfur ions near the target which are accelerated to the growing film by the self-bias developed on the target. This negative-ion resputtering can result in amorphization or re-sputtering of the phosphor films. In severe cases, a net sputtering of the substrate can result. In order to remedy this negative ion resputtering problem, modifications of the magnetron geometry and ion-beam sputtering have been evaluated for production of Ca_xSr_1−xGa₂S₄:Ce and SrS:Ce TFEL phosphors. Sputter deposited TFEL films also typically require a postdeposition anneal which adds to expense and can cause other problems for the flat panel display. Ion-beam assist during deposition of undoped ZnS was studied as a method to induce surface-atom mobility and a more crystalline as-deposited film for use in monochrome TFEL displays.     

Two mask step polysilicon TFT technology for flat panel displays

The deep relationship between MDS codes and threshold schemes in cryptography is initially reported in this paper. It is found that by using the generation matrices or the parity check matrices, MDS codes, one can implement a new class of threshold systems in cryptography     

平板显示器件制造中的柔性连接带热压工艺

介绍了平板显示器件制造中的柔性连接带热压工艺,用此工艺实现显示板和驱动电路板的连接具有方便快捷,可靠性高的特点。     

Gas source molecular beam epitaxy growth of SrS:Ce for flat panel displays

SrS:Ce thin films have been grown by gas source molecular beam epitaxy (GSMBE). The growth conditions have been systematically investigated as a function of growth temperature, sulfur to strontium flux ratio, and cerium flux. Single crystal SrS and high quality SrS:Ce were successfully grown on GaAs and glass substrates, respectively, without post-annealing process at temperature as low as 600°C. It was found that the electroluminescence (EL) performance was greatly improved by addition of ZnS during the growth.     

Full color and monochrome passive-matrix polymer light-emitting diodes flat panel displays made with solution processes

1.5 in. diagonal red, green, and blue monochrome passive-matrix (PM) polymer light-emitting diodes (PLED) flat panel displays (FPDs) with format 96 × 64 were fabricated by spin-coating technology with device structure of ITO/PEDOT/Emissive layer/Ba/Al. During spin-coating process, by rearranging the location and the direction of the panel with respect to the center of the spinner, the piling of organic materials under the cathode separator was significantly reduced, resulting in a more uniform light emission. The final display showed neither dead pixels nor dead lines. Current efficiencies of 1.37, 9.5 and 1.44 cd/A, and CIE color coordinates of (0.62, 0.37), (0.37, 0.60) and (0.15, 0.13), for red, green, and blue monochrome displays, respectively, have been achieved. Further, 1.5 in. full color PM PLED FPDs with format 96 × RGB × 64 was successfully fabricated by inkjet printing technology. The current efficiency was about 0.75 cd/A at full screen white with color coordinates located at (0.34, 0.35). A color gamut of 50% NTSC was obtained. For all the displays, the 5-point uniformity was more than 80%.     

Light wave coupled flat panel displays and solid-state lighting using hybrid inorganic/organic materials

We present a review of light-emitting materials and devices that combine inorganic and organic lumophores and hosts. The essence of this hybrid inorganic/organic (I/O) approach is to combine materials, structures and devices from each category in such a way as to obtain best-of-both-worlds performance. The combination of high power/high efficiency inorganic light pump sources with high conversion efficiency organic lumophores is discussed in detail. In this type of Hybrid I/O device, near-ultraviolet (UV) or blue pump light is selectively converted to various visible colors based on the molecular structure of each lumophore. Since the lumophores are optically pumped their reliability is greatly increased compared to electrically pumped organic emitters. Methods for coupling the light from pumps to lumophores include direct path excitation (DPE) and light wave coupling (LWC). DPE uses one pump per lumophore pixel, which allows for active matrix style addressing, but requires large arrays of pumps. LWC uses either a single source or a small number of pump sources. To obtain pixelation for Hybrid I/O LWC devices we have developed a novel electrowetting switching method. Examples of Hybrid I/O displays and solid-state lighting are discussed.     

The history of liquid-crystal displays

The modem history of liquid crystals has been dominated by the development of electronic displays. These developments began in 1964, when Heilmeier of RCA Laboratories discovered the guest-host mode and the dynamic-scattering mode. He thought a wall-sized flat-panel color TV was just around the corner From that point on, twisted-nematic (TN) mode, super TN mode, amorphous-Si field-effect transistor and room-temperature liquid crystals were developed. In the beginning, liquid-crystal displays (LCDs) were limited to niche applications such as small-size displays for digital watches, pocket calculators, and small handheld devices. That all changed with the development of the notebook computer industry. In 1988, Washizuka et al. of Sharp Corporation demonstrated an active-matrix full-color full-motion 14-in display using a thin-film-transistor array. The electronics industries now recognized that Heilmeier's 25-year dream of a wall-hanging television had become reality. LCDs could be used to replace existing cathode ray tubes. Through the cooperation and competition of many electronics giants, the LCD industry was firmly established     

The flat panel's future

The development of active-matrix liquid crystal displays (AMLCDs) to overcome the limitations of passive LCDs is reviewed. The decision of video graphics adapter (VGA) versions of these displays, the market for these displays, and the companies involved in producing them are discussed. Two alternatives to AMLCDs, one involving a method for driving passive LCDs that would give them most of the benefits of active-matrix displays and the other involving standard passive-matrix color LCDs, are also discussed. The possibility of transferring LCD technology to the high-definition television (HDTV) market and the most likely candidate for that market, plasma display panels (PDPs), are examined     

新技术的结晶:头盔显示器

头盔显示器（Ｈｅｌｍｅｔ－Ｍｏｕｎｔｅｄ Ｄｉｓｐｌａｙｓ，ＨＭＤ）由１９６８年哈佛大学的Ｉｖａｎ Ｓｕｔｈｅｒｌａｎｄ首先提出，并设计出应用ＣＲＴ的名为达摩克里斯之剑的头盔显示器。经过３０年的发展，头盔显示器取得了巨大的进步和广泛的应用。特别是在微型液晶显示器、虚拟现实（ＶＲ）、袖珍计算机、可视移动电话以及现代数字化部队的装备中的逐渐普及，使得头盔显示器在这些领域中占据了重要的地位。 头盔显示器应用 无论是要求在现实世界的视场上同时看到需要的数据，还是要体验视觉图像变化时全身心投入的临场感，模拟训…     

Gas-discharge displays: The state of the art

The physics of the cold-cathode gas discharge is reviewed, with emphasis on such display-related aspects as the visible light output and the use of priming as a method of moving the light-emitting site through the display. Displays used for numerics, alphanumeric characters, and computer graphics are described, with attention being given both to commercially available units and to those which are still in the laboratory. Attempts to produce gas-discharge TV displays are reviewed. Such related problems as drive circuitry and overall system cost are discussed, with emphasis on considering the entire display system, including all the required power supplies and drive-circuit components.     

Three-dimensional displays

Three-dimensional display techniques can be classified as binocular and autostereoscopic types, still and animated types, nontransmitted and transmitted types, and nonholographic and holographic types. This paper deals mainly with autostereoscopic still nontransmitted techniques. Holographic and nonholographic tecniques are described on about equal footing. For the sake of brevity, emphasis is placed upon those techniques that appeared in the past several years. However, some old techniques of historical and/or practical importance are also mentioned because rather few textbooks are available in this field. In the final part, state of the art of three-dimensional display for animated and transmitted images (three-dimensional television) is described. Speculations on the direction of the development are presented.     

Plasma displays

Gas discharge displays (or plasma displays, as they are now frequently called) have evolved into two distinct forms. In dc displays, exciting electrodes are immersed in the gas, and currents are usually unidirectional. In ac displays, electrodes are separated from the gas by dielectrics. Contributions to both forms of display are discussed with particular emphasis on the conception and early history of the ac Display.     

The interchange of time and frequency in television displays

The paper discusses the properties of display systems using frequency rather than time coding of the individual image elements. Various coding techniques, all making use of a dispersive delay line, are compared by means of time-frequency diagrams showing the nature of the coding operation. A detailed analysis is given of one such technique used in conjunction with an acoustic light diffraction cell as the display device. Experimental results for this system are presented in the form of measured modulation transfer functions and photographs of standard television test patterns displayed with this technique.     

兆像素3-D彩色显示器实现高清晰度显示

日本先于其他国家提出了用于移动电话的彩色显示器.预计到2003年底,全球彩屏移动电话的市场占有率将达到50%,在日本、韩国、欧洲、中国和美国,彩色显示器的市场容量是显而易见的.     

平板电视中的开关电源发展趋势

消费电子应用的电源设计一直都存在着外型、成本和能效目标等方面的困难挑战.电视终端市场已经从阴极射线管(CRT)技术转向等离子、液晶显示(LCD)和背授多种数字电视显示技术.其中,LCD已经确立了明显的领先优势,据预测,2008年液晶电视(LCD TV)的全球付运量将首次超过CRT电视的付运量,预计达到1亿部.