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。     

彩色等离子体显示器用荧光粉

本文阐述了荧光粉的发光特性对彩色等离子体显示器（ＰＤＰ）性能影响。介绍了荧光粉激发光谱和相对发光效率的测试方法，并对常用真空紫外荧光粉的发光特性进行了比较。最后分析说明了荧光粉的涂覆面积、厚度、颗粒度大小等因素对ＰＤＰ亮度和光效的影响。     

彩色PDP发光效率的分析及改善方法

分析了影响等离子体显示器(PDP)发光效率的因素,在此基础上, 介绍了提高PDP发光效率的四种措施:选择10%Xe,使用新型的单元结构,利用正柱区放电以及外加射频电压.     

纳秒快脉冲提高等离子体显示平板光效研究

目前等离子体显示平板(PDP)主要问题是光效不高。基于快脉冲驱动能显著提高介质阻挡放电光效的理论基础,提出了快脉冲驱动提高PDP光效的新思路。利用CPLD可控编程控制技术,通过控制快速开关MOSFET开通、关断,实现正负几百伏双极纳秒脉冲输出,使PDP工作在维持驱动期。实验测量了输入电功率及发光效率。给出不同上升沿、脉宽与光效的对应关系,分析硬开关阶段上升沿参数选取的参考值。试验表明,快上升沿脉冲驱动能够显著地改善PDP的发光效率。     

高发光效率电视的竞争

从最关键的显示特性（发光效率）的角度逐一分析了当前相互竞争的LCD、CRT、PDP、投影技术、FED、SED以及OLED等主流显示技术，每种技术都有取得领先机会的优势，但究竟谁会最终胜出？     

等离子体显示板面光源的制备技术及光电特性研究

利用等离子体显示板自发光、薄型、亮度高、发光均匀的特点,开发出基于等离子体显示机理的薄型等离子体面光源,用于需要薄型照明的特定场合.为克服等离子体显示板发光效率过低的不足,对面光源显示板的结构、材料,工艺和驱动电路诸方面进行多项改进,经改进后的等离子体面光源最小厚度不大于4 mm,亮度350 cd/m2,色温为 6500 K,发光效率4Lm/W.光源型 PDP 显示板的研究结果对进一步提高图象型 PDP 显示板的光电性能提供了有益的启示.     

A study on the new type sustaining electrode showing high luminousefficiency in AC PDPs

In order to improve the luminous efficiency of ac plasma display panel (PDP), a new bridge type sustaining electrode is suggested. The luminous efficiency of the ac PDP with suggested new sustaining electrodes is improved about 30% compared with that of conventional sustaining electrodes. Furthermore, the suggested ac PDP is maintained almost the same luminance with the conventional ones, and this type has a merit of free alignment between front and rear panels     

New Sustain Waveform for Improving Luminous Efficiency in Wide-Gap Plasma-Display Panel

The three-electrode microdischarge characteristics of ac-plasma-display panels (PDPs) are analyzed with a wide sustain discharge gap of 180 mum. In particular, the luminous efficiency variation is examined as a parameter of the operating frequency. It is found that the luminous efficiency decreases with an increase in the operating frequency. In other words, a failure discharge mode for luminous efficiency occurs at a high frequency up to 200 kHz, originating from a self-erasing discharge and the space-charge behavior under high sustaining frequency conditions. Thus, based on an analysis of the failure mode of a wide-gap discharge, a new sustain waveform is proposed to improve the luminous efficiency at a high operating frequency. As a result of adopting the proposed sustain waveform, a luminous efficiency of 2.4 lm/W is obtained at a sustain voltage of 170 V in a 42-in high-definition wide-gap PDP.     

Improvement of luminance and luminous efficiency using addressvoltage pulse during sustain-period of AC-PDP

To improve the luminance and luminous efficiency of a surface-discharge alternate current plasma display panel (ac PDP), auxiliary voltage pulses were applied to the address electrode during a sustain-period. The luminance and luminous efficiency exhibited maximum values at an address voltage of 100 V and pulse width of 1 μs. An improved luminance of 21.4% and luminous efficiency of 24% were simultaneously obtained based on the proper adjustment of the widths and amplitudes of the address voltage pulse. Accordingly, the proper control of the amplitudes and pulse widths of the auxiliary address voltage during a sustain-period can improve both the luminance and the luminous efficiency in a surface-discharge ac PDP     

彩色PDP放电单元参数设置分析

本文对三电极表面放电反射结构彩色PDP放电单元进行了等效和分析,利用一实验验证及计算机模拟的结果,研究了放电单元的一些参数变化对单元亮度、功耗以及发光效益的影响,为彩色PDP的单元设计提供了一定的参考。     

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.     

Picture-Based Address Power Saving Method for High Resolution Plasma Display Panel (PDP)

A picture-based high-speed address recovery technique for AC (adaptive control) plasma display panels (PDPs) is proposed. By removing the ground (GND) switching operation, the recovery speed can be increased and the switching loss due to the GND switch is reduced. The proposed method can perform load-adaptive operations by controlling the voltage level of the energy recovery capacitor, which prevents the increase of inefficient power consumption caused by circuit loss during the recovery operation. Thus, the technique shows the minimum address power consumption according to various displayed images, which is different from previous methods operating in fixed mode regardless of images. Test results with a 50-in HD single-scan PDP (resolution=1366 times 768) show that a recovery time of less than 350 ns is successfully accomplished and about 54% of the maximum power consumption can be reduced, by tracing the minimum power consumption curves.     

关于彩色等离子体显示板若干问题的探讨

叙述彩色等离子体显示板的发展现状,同彩色显像管相比,彩色等离子体显示目前还存在一些问题,如发光效率低,对比度低和图像质量差等问题,着重分析发光效率低的问题,并指出其改进方法。     

彩色PDP发光效率的计算

提高发光效率是目前彩色PDP发展所面临的亟待解决的重要课题之一。为了正确计算该参数，本文经过适当简化，证明了计算彩色PDP发光效率的数学表达式。     

高品质等离子电视图象技术

视频信号处理是改善等离子电视显示图象质量最重要的技术之一.当器件特性和信号处理综合优化时,视频信号处理技术就会显示出它的最高效能.噪声抑制、信号格式转换、边缘增强以及灰度实现等信号处理技术都是针对等离子显示器件特性开发和优化的.在图象的信噪比,对比度、分辨率,色彩和灰度等方面,所开发的视频信号处理展现出较高的图象质量.     

彩色等离子体显示器自动功率控制方法研究

为降低彩色等离子体显示器(PDP)的功耗,提高图像质量,在分析了寻址功耗和图像数据在各子场列方向上的变化率有关的基础上,根据自动功率控制(APC)的原理提出了自动功率控制的方法,该方法的主要内容包括:图像最小残像工作模式,图像信号的平均强度和维持脉冲数的关系,图像负载率和亮度及功耗的关系等.根据以上APC的原理和方法研制的107cm(42英寸)彩色PDP电路在功耗和图像质量方面均达到设计目标.     

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     

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     

Information Display Early in the 21st Century: Overview of Selected Emissive Display Technologies

Rapid advances in display technology over the past decade, in particular,have driven costs downward and spurred explosive growth worldwide in the demand for, and sales of, electronic equipment ranging from large screen televisions to mobile phones. Boasting a market well in excess of $79 billion in 2004,displays have surged to the forefront of the optoelectronics industry, largely on the strength of consumer sales. Flat panel technologies such as liquid crystal displays (LCDs) and plasma display panels (PDPs) now offer screens of unprecedented size but also brightness and contrast approaching or surpassing the quality afforded by the cathode ray tube (CRT). This brief review focuses on selected emissive display technologies:PDPs, field emission and surface-conduction electron emission displays, and microcavity plasma arrays. Spanning the range from mature, commercially developed displays to emerging concepts, these technologies underscore the growing importance of the display in consumer, commercial, and research applications for its critical role as an increasingly sophisticated interface between an electronic or electro-optical system and the user.     

A Cost-Effective Sustain Power Conversion Scheme for Plasma Display Panels

This paper presents a cost-effective sustain power conversion scheme for the plasma display panel (PDP). A new energy-recovery (ER) circuit is proposed for a low-cost sustain driver. As a parallel-resonant type ER circuit, it can recover the energy stored in the PDP without the interconnection of the sustaining and scanning electrodes. It has a simple structure and fewer power devices, providing a lower cost of production. In addition, a high efficiency sustain power supply is proposed to provide a constant sustain voltage for the sustain driver. It achieves zero-current turn-off of the output diode, alleviating the diode reverse-recovery problems. The sustain power efficiency is increased by reducing the switching power loss. Therefore, the cost and power consumption of the PDP can be improved. The proposed circuits are theoretically analyzed in detail. The experimental results based on a 32-in PDP are presented to confirm the validity of the proposed circuits.