A New AC Plasma Display Panel With Auxiliary Electrode for High Luminous Efficacy

A new ac plasma display panel (PDP) for high luminous efficacy is proposed, and its characteristics are investigated. The new ac PDP has a coplanar gap of 200 mum and an auxiliary electrode located between the scan and common electrodes. The periodic pulses are applied to the auxiliary electrode during the sustain period, which plays the roles of enhancing the infrared emission and reducing the discharge current. The sustain voltage decreases with the increase of the auxiliary pulse voltage until 80 V. When the voltage of the pulse applied to the auxiliary electrode is 50 V, the luminous efficacy reaches its peak value and is approximately 8.7 lm/W obtained from the measurement of Ne + 20% Xe gas-mixture discharges in the green cells. The luminous efficacy of the new proposed test ac PDP with Ne + 13% Xe and Ne + 20% Xe gas mixtures is improved by 190% and 320%, respectively, compared to that of the conventional ac PDP with a Ne + 13% Xe gas mixture     

Luminance Uniformity of Large-Area OLEDs With an Auxiliary Metal Electrode

One of the key issues of a large-area organic light-emitting diode (OLED) for flat panel lighting applications is to enhance the uniformity of light emission. In this work, we have investigated the effect of an auxiliary metal (chrome) electrode in association with a device configuration on the luminance uniformity of a large-area (15$times$15 cm $^{2}$) white OLED. We demonstrate that the ratio between the effective horizontal resistance of anode (indium–tin–oxide (ITO) with the grid patterned metal electrode) and the vertical resistance of the OLED device is the critical factor to determine the luminance uniformity. Moreover, the luminance uniformity is shown to be a function of the current density and degraded with increasing current density. Namely, the OLED panel with the 200-$mu$ m-wide metal lines exhibits the luminance uniformity as high as 90% at 200 mA and 85% at 500 mA.      

表面放电型AC-PDP电极制作工艺研究

电极制作是大面积彩色ＰＤＰ应用研究所涉及到的一个很重要的工 艺制作技术，本文将从薄膜和厚膜两方面对表面放电型ＡＣ－ＰＤＰ中的电极制作工 艺进行介绍。     

PDP扫描电极高压驱动电路的研究

介绍了PDP驱动电路的构成,在分析扫描电极高压驱动波形和驱动电路设计考虑的基础上,研究了扫描电极高压驱动电路的实现方法,并对能量恢复电路作了一定的介绍。通过电路分析,该驱动电路能够完成各个时期输出相应脉冲的要求,且能量恢复电路能够降低系统功耗。     

Characteristics of an address discharge time lag in terms of a wall voltage in an AC PDP

The characteristics of an address discharge have been investigated in terms of a wall voltage, which plays an important role in achieving a high-speed address discharge in an ac plasma display panel. The wall-voltage conditions generated in a reset period are a considerable factor to reduce the address-discharge time lag. Based on the experimental results, the reset driving scheme in which an address bias voltage is applied to the address electrode in a reset period is proposed to enhance the characteristics of an address-discharge time lag.     

一种PDP电极缺陷自动检查系统的设计

提出一种PDP电极缺陷自动检查系统的设计方案,系统分为机械部分、数据采集部分和图像处理部分.机械部分为整个系统提供扫描平台.数据采集部分由FPGA控制线阵CCD数据的采集与传输,并通过USB2.0接口将数据存储到PC机上.图像处理部分通过介绍一种简单的图像处理方法,在PC机上实现了简单的PDP电极缺陷的识别.本系统可及时、快速、准确地查找PDP电极缺陷的位置及其种类.     

彩色PDP驱动技术研究

介绍的彩色 ＰＤＰ驱动技术,已成功地将彩色 ＰＤＰ进行动态驱动显 示。     

AC Microplasma Device With a Cylindrical Hollow Electrode for Improving Luminous Efficacy

In this paper, a device utilizing the hollow cathode discharge is demonstrated to diagnose the possibility of improving luminous efficacy of a microplasma device. A series of experiments is conducted by measuring luminous efficacy, which is an important factor in display devices, in accordance with specifications of the cylindrical hollow and gas pressure. The proposed structure has two electrodes, and one of them contained a cylindrical hole and is called a hollow electrode. The hollow electrode works as either a cathode or an anode alternately due to the ac operating conditions. When the hollow electrode operated as a cathode, the luminous efficacy is higher than that of the anode case, and this tendency is observed consistently throughout all experiments. Moreover, from the measurement results on the tendency of luminous efficacy in terms of hole specifications, different aspects of luminous efficacy are obtained, depending on whether the variation is in the diameter or in the depth. In case of the diameter, the luminous efficacy is improved when $p cdot D$ (i.e., the product of the gas pressure and the diameter of the cylindrical hole) is less than one $hbox{Torr} cdot hbox{cm}$. In the case of the depth, the maximum value of luminous efficacy exists at the certain $p cdot d$ (i.e., the product of the gas pressure and the depth of the cylindrical hole).      

AC PDP介质膜的实验研究

研究了用薄膜 Ｓｉ Ｏ２ 作介质的可行性。并对电子束蒸发制备的 Ｓｉ Ｏ２ 介质膜进行了微观分析。     

热处理工艺对AC PDP中MgO保护膜性能的影响

保护膜的表面特性严重影响ＡＣ ＰＤＰ的性能,本文以电子束蒸发法制得的ＭｇＯ保护膜为例,有关热处理条件对保护膜表面基本特性,如结晶结构,表面形貌及成分等的影响进行了研究。     

彩色PDP低功耗驱动技术探讨

目前彩色PDP的功耗比较大,这主要是由于它的发光效率比较低,高压高速电路损耗较大,以及显示屏寄生电容的充、放电而带来的无用功耗比较大而造成的。为了降低彩色PDP的功耗,介绍了能量恢复技术、降低电路损耗的电路技术、以及多种提高发光效率的驱动方式等多种方法,这些方法的综合采用,可以显著降低PDP的功耗。     

A driving method for high-speed addressing in an AC PDP using priming effect

A novel driving method is proposed to reduce the addressing time in an ac plasma display panel. In this method, priming discharges are used to achieve high-speed addressing without adding an auxiliary electrode. Some of the scan lines were used to provide the priming particles for the reduction of the address discharge time lag (t/sub d/) in the adjacent scan lines. The number of priming electrodes was optimized and two different types of priming discharge were tested in order to reduce the inherent light output caused by the priming discharges. In the panel experiment, the t/sub d/ was reduced to one half of that of the conventional method when the priming particles were provided and the background luminance was reduced from 4.97 to 2.94 cd/m/sup 2/ through the reduction of the number of priming electrodes, and further, by changing the type of the priming discharge while the peak luminance could be improved more than twice by allocating the saved-time-to-display period, which in turn, resulted in a higher contrast ratio.     

彩色AC-PDP充气的优化

综述充气成分、配比、压强对彩色ＰＤＰ特性的影响。利用辉光放电管和３英寸ＡＣ－ＰＤＰ表面放电模拟板,测得几种常用气体的ＤＣ放电巴邢曲线和ＡＣ表面放电的着火电压曲线。结果表明,对ＡＣ表面放电的电极系统不符合气体放电相似定律,其着火电压Ｕｆ也不符合巴邢定律。为提高亮度和光效,对表面放电ＡＣ－ＰＤＰ,充气压强应选在Ｕｆ＝ｆ（ｐ）曲线的右支。最后归纳ＡＣ－ＰＤＰ充气的优化步骤。     

感光性浆料法制作PDP电极的工艺

对利用感光性浆料制作ACPDP电极的工艺进行了研究，获得了良好结果，并对研究中遇到的一些问题进行了分析和讨论。     

等离子显示驱动技术的中国专利申请分析

近年来平板显示技术得到了快速发展,等离子显示器作为平板显示器的代表之一,以屏幕大、可视角大、动态清晰度高等优势受到广大用户的关注.以等离子显示驱动技术为分析对象,对其中国专利申请进行分析,以期为我国相关行业和用户提供一些参考和帮助.     

彩色PDP显示电极的制造工艺

叙述一种低温制造透明电极的技术,它克服高温喷SnO2产生变形的缺点,从而满足了彩色PDP显示器的要求.另一方面,也叙述了汇流电极的制造方法.同时,也指出光刻技术和印刷技术在彩色PDP显示器中的重要应用.     

PDP显示驱动技术分支的中国专利申请分析

等离子显示器(PDP)显示驱动技术是等离子显示器发展的重点技术,根据解决的技术问题可分为亮度调节、能量恢复、动态伪轮廓控制等分支.本文对以上几个技术分支的中国专利申请状况进行检索和分析,以期能够根据各个技术分支的发展状况为我国的相关行业和用户提供一些参考.     

基于荫罩式PDP新型十字扫描电极放大单元的研究

新型荫罩式等离子体显示板利用制造工艺成熟的金属荫罩替代复杂的介质障壁,不仅降低了成本、而且改善了性能.为了进一步提高其亮度和效率,针对42 inch荫罩式等离子显示器提出了一种新型十字形扫描电极结构,采用放大单元实验方法,研究了该电极结构的放电过程,给出了高速ICCD拍摄的光分布图.测量了相应的功耗、红外辐射强度、以及放电效率,并与传统条状电极结构进行了比较.结果表明,新型十字形扫描电极结构使放电区域沿扫描电极的主电极部分大大扩展,放电更剧烈,亮度也有显著提高,效率得到了改善,放电速度也更快.     

驱动波形对新型荫罩式PDP 放电单元放电特性影响的研究

采用二维数值模拟的方法研究了新型荫罩式PDP结构中驱动电压波形的上升(下降)沿对其单元放电特性的影响。分别模拟了寻址期和维持期内驱动电压沿为线性及正弦波形时的放电过程，给出了单元内电位分布变化情况，电子及氙谐振态平均浓度随时间变化的情况。得到了粒子峰值出现时刻与电压波形的上升(下降)沿的关系。