一种提高PDP亮度和对比度的新驱动波形

PDP由显示屏体和电路组成,电路驱动屏体,从而产生多彩的图像。介绍一种提高AC-PDP的对比度和亮度的驱动波形。在初始期,新的初始波形能提高对比度和分辨率,也能降低寻址电压。在维持期,新波形的脉冲可以减少自擦除放电,从而提高发光效率。接着提出对该驱动波形的进一步改进。最后给出了采用该驱动波形的42英寸PDP测得的实验结果,证实了这两种新波形的可行性。     

一种应用于AC-PDP开关电源的逻辑电压输出延时电路

根据AC-PDP电路系统的要求,分析了AC-PDP开关电源不同输出电压在开启和关闭时必须满足的时序要求,提出了一种新的应用于AC-PDP开关电源的逻辑控制电压输出延时电路,并通过实验验证了该电路的可行性.     

Multilevel voltage wave-shaping display driver for AC plasma display panel application

A new sustainer circuit with multilevel voltage wave-shaping characteristics for an AC plasma display panel (AC-PDP) drive is proposed. The proposed circuit features half the device voltage stresses and significantly reduced power losses compared with those of the conventional ones. This circuit, realizable without much increased cost of the semiconductor devices, gives a significant improvement in the power efficiency, essential for the design of a drive circuit for the AC-PDP. A comparative analysis and experimental results are presented to show the validity of the proposed sustainer circuit.     

高对比度等离子体显示器驱动方法

提出了一种提高等离子体显示器(PDP)显示对比度的驱动方法，该方法以传统的寻址与显示分离(ADS)方式为基础，一场只需要一次全屏放电。在各子场的复位期，采用分别加在X和Y电极上的斜坡电压脉冲擦除壁电荷，斜坡电压脉冲末端的电位与X，Y电极在寻址期中被扫描到时所加电压一致，不仅提高了寻址的准确性，且有利于增大寻址电压动态范围并降低寻址电压。     

AMOLED电流镜像像素电路的稳定性分析

a—Si：HTFT在长时间施加直流栅偏压下将导致晶体管闽值电压漂移,造成OLED的发光亮度下降,影响其使用寿命。而多管的像素电路设计可以补偿或消除阂值电压的漂移。本文分析了电流控制电流镜像像素电路的工作原理。结合a—Si：HTFT阈值漂移模型仿真了电路在长时间工作下阈值漂移对驱动电流稳定性的影响,并提出了相应的解决办法。研究结果表明合理的像素电路设计可以有效改善驱动电流的稳定性。     

彩色AC-PDP扫描驱动控制时序的FPGA实现研究

针对传统彩色AC-PDP扫描驱动控制电路8子场地址显示分离（ADs）驱动方式存在的缺陷,采用分割和优化子场排列顺序的ADS驱动设计方法。给出了基于现场可编程门阵列（FPGA）器件的PDP扫描驱动控制电路的结构、原理及相应Verilog HDL后仿真波形,成功实现了对富士通42寸PDP显示屏的扫描驱动控制,有效改善了动态伪轮廓现象。     

一种新型的AC-PDP能量恢复电路

在简单介绍表面放电型AC-PDP的结构和发光原理的基础上,引出能量恢复电路的思想.介绍常用的能量恢复电路及其工作过程,指出该类电路的弊端.提出一种全新的能量恢复电路,最后给出了其控制波形.     

Improvement of color temperature using independent control of red, green, blue luminance in AC plasma display panel

This paper presents a new driving scheme for the improvement and flexibility of a color temperature without sacrificing a peak white luminance using an independent control of the red (R), green (G), and blue (B) luminance in an alternating current plasma display panel (AC-PDP). The independent control for the R, G, and B emissions can be achieved by selective application of the various narrow auxiliary pulses to the R, G, and B address electrodes during a sustain-period. The auxiliary pulses can control the luminance levels independently from the R, G, and B cells by forming the fast and efficient plasma or by slight disturbing of the wall charge accumulation. By the application of various auxiliary pulses leading to the simultaneous control of each color's luminance, it is observed that the new driving scheme can improve the color temperature from 5396 K to 10 980 K in a 4-in test panel with almost the same peak white luminance as that of the conventional driving scheme.     

新型等离子体平板显示器放电特性研究

本文研究了具有响应频率快、亮度高、着火电压低以及成本低等特点的新型槽型结构等离子体平板显示放电单元的放电特性,并与传统的表面放电结构进行了比较.给出了不同时刻两种结构放电单元中电场、各种粒子浓度的空间分布以及各种粒子的平均浓度随时间的变化关系.在没有能量恢复电路的情况下,该结构14″实验屏的发光效率达到0.9lm/W,功耗为50W.     

AC- PDP 的发光光效的数值模拟计算

根据AC—PDP中气体放电机理的物理模型，修改了前人提出的基于粒子流连续性方程和泊松方程的AC—PDP放电单元的数值计算模型。然后由模型的数值解描述了放电过程中三种波长(147nm，152nm，173nm)的紫外光子的时空分布，从而进一步计算出累计的紫外光光效。     

平板显示器响应特性的分析和测量

动态图像的显示质量是平板显示器的一个重要指标,通过讨论液晶显示器和等离子体显示器不同的性能参数,提出了一种能够精确采集多种灰度条件下的响应曲线的电路设计方案并通过PSPICE模拟对其进行了验证.为了将测量的结果与人眼感知的亮度相互对应,采用标准的亮度计对采集电路的输出进行了校准,并进而得出了被测PDP最高亮度时的荧光粉响应曲线.实验证明该电路在精确度、带宽和信噪比等方面符合采集系统的要求.     

微波检波信号增益自动控制方法研究与实现

在智能微波开关信号解调电路中采用了三级程控放大电路,各级放大电路的增益由多路SPI数字电位器MCP4351控制。测量电路对灵敏度调节电位器输出电压进行测量,在保证各级输出不失真的情况下,根据约束条件分配测量结果所对应的总增益,并形成增益分配表。其中,第二、三级增益按照线性法分配,第一级增益按照约束方程计算得出。解调时,系统控制核心MSP430F149查增益分配表得到数字电位器的调整值,并按照调整值调节电位器的阻值,实现增益的自动控制。该方法不需要单片机进行大量复杂的增益计算过程,节省运行时间和程序存储空间。     

AC—PDP显示单元中粒子传输运动的稳定差分求解

给出了用差分法求解ＰＤＰ放电单元粒子流连续方程的计算公式，通过对单基板ＡＣ－ＰＤＰ放电单元电场分布的求解，分析了电场突变区域计算公式不稳定的原因。针对四种电场突变区域的分布情况，提出了对应的稳定计算公式。     

AMOLED Pixel Circuit With Electronic Compensation of Luminance Degradation

A new voltage-programmed pixel circuit using hydrogenated amorphous silicon (a-Si:H) thin-film transistors (TFTs) for active-matrix organic light-emitting diodes (AMOLEDs) is presented. In addition to compensating for the shift in threshold voltage of TFTs, the circuit is capable of compensating for OLED luminance degradation by employing the shift in OLED voltage as a feedback of OLED degradation     

等离子体驱动电路逻辑控制波形的设计及其FPGA实现

本文介绍一种新的AC—PDP逻辑控制电路的设计思想；利用MAX plusⅡ软件，结合原理图和VHDL语言设计了符合驱动要求的驱动波形和驱动逻辑控制电路。     

42英寸AC-PDP的驱动原理及能量恢复研究

讨论了三电极交流等离子体平板显示器（AC-PDP）的驱动原理，着重对PDP中基于L，C谐振电路的能量恢复系统进行了详细的分析，给出了数学模型，并就该模型讨论了决定能量恢复效率的时间、器件参数等因素的影响。     

A theoretical model for the current-voltage characteristics of afloating-gate EEPROM cell

A model for current-voltage characteristics of an EEPROM cell has been developed and used in the simulation of an EEPROM test structure. It provides an explanation for the observed strong drain-induced barrier lowering effect and the role of trapped charge in the floating gate. In this model, the surface potential is related to the terminal voltages through an equivalent electrical circuit. Charge sheet and depletion approximation are used to describe the charge distribution in the semiconductor. Gradual approximation is assumed in deriving the drain current equation. A simplified drain current equation under a strong inversion condition is derived. An expression defining the extrapolated threshold voltage is obtained. It is useful in parameter extraction. A new method for extracting the drain coupling ratio and the channel coupling ratio is proposed. Finally, it is shown that extrapolated threshold voltage is a convenient quantity for classifying the threshold voltage of an EEPROM cell     

交流彩色PDP信号处理与控制电路的设计

针对ADS显示技术提出了107 cm(42英寸)交流彩色PDP信号处理控制电路的实现方案,并对方案的工作原理、实施方法进行了详细的介绍,采用FPGA进行了实时仿真.     

一种支持OLED亮度补偿的电流型PWM像素驱动电路

OLED(organic light-emitting diode,OLED)微显示器长时间工作在高对比度、高亮度的状态下,OLED像素衰退不一致,发光亮度衰退也不一致,会产生残影现象。因此,提出了一种改进的电流型PWM像素驱动电路,保持了对OLED像素衰退补偿效果,同时可以读出OLED阳极电压,计算得到OLED衰退信息,以便于对OLED亮度衰退进行有效的补偿。文章中分析了改进的电流型PWM驱动电路结构,及其对OLED衰退补偿和亮度补偿的原理。通过模拟仿真,得到几个影响OLED衰退补偿效果的关键参数。当OLED像素衰退电阻R_oled小于40 MΩ时,该电流型PWM驱动电路电流衰退度与传统2T1C驱动电路相比,只为其衰退度的50%。     

Modeling of the Reverberation Chamber Method for Determining the Shielding Properties of a Coaxial Cable

The paper considers the reverberation chamber (RC) method for the measurement of the shielding effectiveness (SE) of coaxial cables with braided shields. In particular, the voltage at the cable termination is numerically computed and compared to that measured in an RC. The RC field is represented by a finite summation of random plane waves, and a finite-difference time-domain (FDTD) code is used to calculate the outer shield current induced by the RC field. The knowledge of the shield current distribution allows the determination of the voltage at the cable termination's internal circuit after a proper numerical averaging. It is then compared to the measured voltage averaged over stirrer rotations. The method is applied to a commercially available cable model RG58, and using the nominal value for the transfer impedance of this cable type gives results in a satisfactory agreement with the measurements. Finally, the possibility of recovering the transfer impedance from the measured SE of the RC is discussed.