A full-color matrix liquid-crystal display with color layers on the electrodes

A full-color matrix liquid-crystal display panel with color stripe layers of red, green, and blue on theY-electrodes is proposed. The color stripe layers of 300-µm pitch are made by photolithography. The color purities of greenish, bluish, and purplish colors obtained by the liquid-crystal display panel are as good as those of typical printed inks, while those of yellowish and reddish colors are poor at present. In addition, effects of the color layers on the display properties are discussed.     

A positive column discharge memory panel for color TV display

The dc gas-discharge display panel introduced combines internal memory characteristics with the positive column discharge, yielding high luminance and efficiency. The nature of the memory function is based on shifts in the discharge path between display and auxiliary discharge spaces. Because of this operating principle, the panel has a switching time as fast as 10 µs, enabling use of the panel for real-time color TV displays with 64 gray levels.     

High-resolution thick-film dielectric barriers for optical isolation in color plasma displays

The UV-excited phosphor plasma display is a promising technology for large area high-resolution color displays. The incorporation of multi-phosphor arrays in such displays requires the use of UV isolation barriers for effective color separation. The resolution limitations of current thick-film technology necessitate the development of new approaches to the fabrication of high density, high resolution barrier structures for flat display devices. A processing technique for the patterning of lead-bearing thick film dielectrics via selective chemical etching in fluoboric acid is presented, which makes possible the fabrication of dielectric barriers 0.025 mm wide and 0.025 mm high for full-color plasma displays with increased resolution.     

High-performance plasma display panel with cathodes in the cellwalls

An improved color DC plasma display structure was developed and its characteristics were investigated. The configuration of the device is formed using a multiple thick-film printing technique which allows the realization of a large-scale panel. Discharge occurs from thick cathodes formed on three of the cell sidewalls. The panel developed exhibits the following improvements when compared to a conventional panel with straight row-and-column electrodes: it generates a high luminous efficiency of 0.16 lm/W (a 1.3-fold improvement with a 200-μA/cell), produces high uniformity in light output (a 1.4-fold improvement), and has an increased lifetime under accelerated conditions of 240 h at 400 μA/cell (corresponding to a 4-fold improvement at 70% of initial brightness). The mechanisms of the improvements used in the new cathode structure are discussed     

Performance analysis of PLED based flat panel display with RGBW sub-pixel layout

PLED based flat panel displays with RGBW sub-pixel format utilizing a white emitter as the fourth primary, was analyzed theoretically and experimentally. Instead of the traditional white point characterization method, uniform luminance color space was introduced to characterize the display performance in a more realistic way. In the uniform luminance color space, after the power efficiency of the white emitter exceeds a threshold determined by the green emitter’s efficiency, the RGBW display becomes more energy efficient than the RGB display. To simulate the display performance in different applications, such as computer desktop visualization, or video application, the color usage frequency with Gaussian distribution was adopted. As the color usage frequency distribution gets closer to that in the real images, the full color pixel’s power efficiency of the RGBW display is more and more dependent on the EL performance of the white emitter. With a highly efficient white emitter as W sub-pixel, the RGBW display will be the preferable choice for displaying video information.     

LSI-Direct-controlled plasma display panel

A plasma display panel with auxiliary discharge cells to control the display cells has been developed. The panel can be directly controlled by low-voltage MOS-LSI switching circuits.     

OLED——提升人类视觉享受

与液晶显示器（LCD）相比,有机发光二极管显示器（organic light emitting display,OLED）具有主动发光、广视角、重量轻、厚度小、高亮度、高发光效率、发光材料丰富、易实现彩色显示、响应速度快、动态画面质量高、使用温度范围广、可实现柔软显示、工艺简单、成本低、抗震能力强等一系列优点,因此被专家称为未来的理想显示器。文章介绍了OLED的产生与发展过程,并着重介绍了OLED与目前占主导地位的LCD和等离子显示器（PDP）相比在显示性能和器件制造方面所具有的领先优势。     

Design for SOP AMOLED display panel

A novel full color SOP（system on panel） AMOLED display based on the MIUC polycrystalline silicon TFT technique, and a new control circuit for the panel, which can deal with both VGA and DVI input signals have been developed. To realize gray-scale a sub-frame technique has been designed and im- plemented by FPGA device, in which an 120 module has been inserted. Through actual circuit, the whole design has been proven and the advantages of the SOP AMOLED display panel have been confirmed.     

双色光柱等离子体显示板技术

本文介绍了一种双色光柱等离子体显示板,阐述了彩色光柱板的基本工作结构和工作原理,对研制过程中解决的关键工艺技术问题进行了总结。     

具有模块结构的高分辨率彩色AC等离子体大屏幕显示

采用模块结构拼装而成的高分辨率彩色等离子体大屏幕显示，色彩鲜艳，其面积可按需扩展，单元模块显示板象元集成度高，显示屏幕画面无拼缝，信息连续。本文介绍了这种高分辨大屏幕显示系统中彩色模块显示板的结构设计，大屏幕拼装的关键技术及适用于这类大屏幕显示装置中驱动电路的设计思想。     

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     

A new DC plasma display panel using microbridge structure andhollow cathode discharge

A newly designed dc plasma display panel (PDP) using a microbridge structure and hollow cathode has been proposed, and its characteristics have been measured. This new plasma display panel operates in an abnormal glow in the current range from 0-50 μA at 500 torr, with an effective internal resistance of 800 KΩ. This means that the internal resistance is high enough that a resistor-in-cell structure is not necessary any more for the dc PDP. The luminous efficiency of the hollow cathode discharge is at least five times as great as that of subnormal and normal glow discharges. The lifetime of the display panel is shown to be quite insensitive to gas pressure in the range of 400-1100 torr because the sputtered materials are trapped inside the hollow cathode     

A DC gas-discharge display panel for automobiles

A simple color instrument panel has been developed for automobile use that has a self-scanning function realized through a dc gas discharge. The panel, 120 mm × 270 mm × 5 mm in size, includes four separate bar graphs for the speedometer, tachometer, fuel gauge, and temperature gauge, as well as two digitmeters for the speedometer and odometer or trip distance display. Turn signals are also displayed. During fabrication of the panel all electrodes are screen printed simultaneously on a glass substrate using conductive ink. The anode and cathode electrodes are arranged reciprocally, and are connected to two busses and to two or four busses, respectively. Phosphors for the color display are deposited on nonglare front glass and are excited by UV radiation emitted by a negative glow discharge in a mixture of He + Xe.     

Multiple states and variable intensity in the plasma display panel

The plasma display panel, in its usual mode, retains information in the form of wall charges that determine whether or not a sequence of discharges will be maintained at a given cell. These discharges are stable in the sense that a perturbation in wall voltage at a particular discharge will damp out over the succeeding discharges. Recent work has shown that a cell in a plasma display panel can exist in one of several states, each with a unique set of wall voltages and each with a unique average intensity. As with the bistable case, each state is stable in the sense that perturbations damp out. Three states have been achieved simultaneously, with brightnesses that can be characterized as bright, medium, and dim. Within the constraints of a simple theoretical model, the conditions for stability can be stated in terms of the products of the slopes of charge transfer curves. This technique for achieving variable intensity retains the advantage, inherent in the plasma display technique, that the information, once imparted to the display, is retained as long as the sustaining signal is applied to the entire panel.     

A 20-in. color DC gas-discharge panel for TV display

A 20-in. diagonal color gas-discharge panel with 640×448 cells and an average cell pitch of 0.65 mm has been experimentally developed using thick-film printing and photolithographic phosphor deposition techniques. Improvements in both the cell structure and fabrication technique have produced wide memory margins for the pulse memory operation. Full-size NTSC color TV pictures with excellent uniformity have been displayed with an area luminance of 17 fL and a luminous efficacy of 0.13 lm/W     

An experimental real-time color-TV display with a DC gas-discharge panel

An experimental color-TV picture display is presented on a dc gas-discharge panel which is based on the Burroughs' "self-scan" panel. An array of 127 × 160 dots of three color phosphors were formed on the inner surface of the front glass plate to reproduce color pictures. A thinner center sheet of soda glass with a thickness of 0.25 mm was used so that the phosphors might be excited effectively by the UV radiation generated from the negative glow of the discharge. Based on our vacuum-spectroscopic measurements on various phosphors, Y2SiO5:Ce (blue), Zn2SiO4:Mn (green), and Y2O3:Eu (red) were selected. An excellent color picture was reproduced with a contrast ratio of greater than 30:1 with continuous gray scale.     

Electron transport self-shift display using an AC plasma panel

Using an electron transport mechanism, a self-shift display has been successfully implemented on an ac plasma panel providing higher resolution, higher shifting speed, and wider operating margins than previously obtained. The mechanism consists of a unidirectional and efficient transport of a large portion of electrons (generated during the display site discharge) to a neighboring OFF transfer site by a low transverse voltage. The process results in a large wall voltage build-up at the transfer site to switch its state from OFF to ON. The implemented electron transport self-shift display consists of a 7 × 128 site array of an Owens-Illinois 60 lines per inch panel where the 128 columns are driven by a four-phase driver. A resolution of one display site for every two electrodes and a shifting speed better than 600 characters per second have been successfully demonstrated. The ranges of the shifting voltages VDand VTare better than 15 V over a 10-V sustain range. The shifting operation also was successfully demonstrated on an 83 lines per inch panel with good operating margins.     

Electrophoretic image display (EPID) panel

A new reflective-type electrophoretic image display (EPID) panel is described which is based on electrophoresis. In the EPID panel, a suspension is mainly composed of pigment particles and a suspending liquid. A dc voltage applied across a suspension layer changes the reflective color of the suspension as a result of the electrophoretic migration of the particles. The precipitation of the particles in the suspension is prevented by making the densities of the pigment particles and the suspending liquid equal. Color combinations of both the pigment particles and the suspending liquid can be used to achieve a desired color display. A reversal between the colors of the displayed pattern and its background can be obtained by changing the polarities of the applied dc voltage. The EPID panel has a memory function because of the deposition of the pigment particles on the electrode surface. A reflective contrast ratio of 40:1 at 75 V dc is demonstrated with experimental EPID panels. Rise and fall times of the panels are 20 ms and 10 ms, respectively, at 100 V ac. Power dissipation of the panel is about 7.5 mW for displaying a numeral "8" (107 by 59 mm²).     

PDP的对比度增强技术研究

等离子体显示器(PDP)因其大尺寸、高响应速度等优点占据了较大的大屏幕高清晰度电视市场,但是对比度性能作为图像质量的关键技术指标仍有提高的余地.从结构、波形、算法等几个方面介绍了提高PDP对比度的常用技术,包括黑条结构、色彩滤波、改善驱动波形、分割低灰度子场、直方图均衡化等,并分析了它们的优缺点.     

Improved 40-inch plasma display for wall-hanging HDTV receiver

A new 40-inch-diagonal color dc plasma display panel (cell pitch: 0.65 mm, 800×1340 cells) with both a resistor-in-cell structure and a phosphor screen on the side wall and bottom of the cell has been developed through the improvement on the large-area panel fabrication technologies. Stable HDTV pictures have been experimentally reproduced on a compact display using the new panel and pulse memory drive circuits. The peak white luminance is 150 cd/m². The lifetime of the 40-inch panel is expected to be over 30,000 hours, judging from the results obtained using a medium-sized panel under the same conditions