Yoshimi Kawanami

17.3: Improvement of the Speed of Address Discharges in Ne‐Xe‐He Discharge Gases for ACPDPs

The time lag of address discharges is discussed in terms of its relation with discharge gas composition. We measured the discharge time lag in ACPDPs with Ne-Xe-He mixed gases. As the concentration of helium increases, the address discharge time lag becomes shortened because helium atoms reduce mostly the formative time lag of the discharge. The formative time lag depends on the ion drift velocity at the initial stage of discharge formation. This ion drift velocity becomes lager with higher helium atom concentration.

25.4: An Address-Voltage-Modulation Drive for High-Luminous-Efficiency ac-PDPs

The developed address-vlotage-modulation drive generates pre-discharge in an ac-PDP (plasma display panel) by applying a rising address-pulse voltage during the sustain-pulse-open period. This pre-discharge increases the panel luminous efficiency by approximately 30%. This increase in luminous efficiency is a result of decreases in effective discharge voltage and electron temperature.

35.3: Noise‐free Plasma Display Panels for Consumer Use

The generation mechanism of the buzzing noise coming from PDPs and a method to reduce the noise are discussed. The cause of the noise is vibration in the panels. The front and rear glass plates compose a beam as a result of projections at barrier rib ends. The projections are created during sand blasting and firing. The forms of the barrier ribs were optimized with computer simulations, reducing the heights of the projections to about one-third. The amplitude of the vibration is proportional to the square of the drive voltage. Minimizing the voltage difference between the front and rear plate electrodes is an effective way to decrease the buzzing noise level.