High-Performance Sustain Driver for Plasma Display

A Study of Unidirectional Driving Circuit of Piezoelectric Device Considering Energy Recovery

“…Piezoelectric material is being used widely in various areas. Especially piezoelectric material used as mechanical actuators are operated using inverters which can apply positive or negative voltages to the piezoelectric loads [1][2][3][4]. Some loads need alternating voltage and some need unidirectional voltage.…”

“…If the load need to be operated under unidirectional voltage (0 or supplied voltage), after charging the load's capacitance to reach to the output voltage level, the accumulated energy needs to be dissipated for the load voltage to become 0. If there is no discharging circuit, the load resistance becomes discharging resistance, which makes the system have low efficiency and need big power supply [3,4]. In this study, to reduce the energy dissipation and the load peak current, a half-energy recovery circuit which adds two switches to the conventional circuit is proposed.…”

AC-PDP Sustain Driver using Bidirectional Switches

“…Sometimes, it also results in instability because of inconsistency in the input state; the voltage across the panel is only maintained by the input voltage source. To achieve faster rise-time of the panel voltage, sustainers equipped with voltage boost-up function have been introduced [4], [5]. The boost-up function provides for additional time margins.…”

“…In PDP operations, power is not delivered to the panel; it is simply charged and then discharged. Therefore, the efficiency at which the sustain driver recovers energy is defined as recovery efficiency and expressed by the input current obtained from the power supply [5]- [7], [15], [16].…”