Kunio Takayama

37.1: High-speed Address Driving Waveform Analysis Using Wall Voltage Transfer Function for Three Terminals and Vt Close Curve in Three-Electrode Surface-Discharge AC-PDPs

A new model of three-electrode surface-discharge AC-PDPs for driving waveform analysis and design was developed. A cell state is represented by a two-dimensional cell voltage vector, which is the sum of a wall voltage vector and an applied voltage vector. These vectors can be expressed on a plane of cell voltages, and the threshold cell voltages at firing are on a close curve on this plane. Using these concepts, wall voltages measurements, cell behavior at ramp setup, and the design of high-speed addressing waveforms are discussed.

10.3: Analysis of a Weak Discharge of Ramp‐Wave Driving to Control Wall Voltage and Luminance in AC‐PDPs

We investigated a weak discharge of ramp-wave driving in AC-PDPs. A new interpretation of the wall voltage transfer curve for ramp-wave driving was introduced. Both the sweep-rate of ramp-waves and the priming affect wall voltage controllability. These effects can be explained by the turn-on characteristics of the transfer curve.

30.4: Ramp Setup Design Technique in Three-electrode Surface-discharge AC-PDPs

A simple model to calculate changes in wall voltage during weak discharge in three-electrode ACPDPs was developed. A change in the wall voltage vector has an intrinsic direction for each discharge, which not only reveals the basis of problems in the ramp setup but also simplifies the analysis of cell operation during setup. New ramp-setup waveforms designed for this model widened the operating margin.

Display. Special Contribution from Asia Display/IDW'01. A High-Quality Picture Technology for PDPs with Delta Tri-color Arrangement Cell Structure.

We developed a high-quality picture technology for PDPs with the DelTA (Delta Tri-color Arrangement) cell structure. A 42-inch PDP with the DelTA cell structure was found to have disordering in the display of horizontal lines. Using subjective evaluations, we demonstrated that picture quality can be improved by using a low pass filter, which reduces disordering without decreasing picture sharpness. To increase the vertical resolution, we developed the double density scan (DDS) processing technique. Using the DDS technique, we achieved a vertical resolution of over 700 TV lines on a 480-line DelTA-PDP. Comparing the vertical MTF characteristics of a 512-line DelTA-PDP with those of a 768-line square-cell PDP, and considering the effect of the format conversion, we demonstrated that a 512-line DelTA-PDP can be expressed to areas of higher spatial frequencies.