Abstract: An apparatus for buffering a signal delay between display devices in a multi-display environment includes: a delay setting unit for storing a delay time value and providing the delay time value to a signal input controller; a storage unit for storing and outputting an image signal according to the control of the signal input controller; and the signal input controller for controlling an input of an image signal from an image processor to a display module, the signal input controller controlling the image signal input from the image processor to be stored in the storage unit and then input to the display module after a delay as much as the delay time value. Since an image signal input time difference of all display devices is buffered to offset a display time difference of the display devices, it is possible to prevent image quality from deteriorating.

Abstract: An energy recovery circuit for a plasma display panel (PDP) according to the present invention includes an energy recovery unit recovering and storing energy from the PDP; and a switching stabilizing unit electrically connected to the energy recovery unit to stabilize switching of a sustain discharge pulse applied to the PDP. The switching stabilization unit may include one diode, two switches and one capacitor for energy recovery, or include two switches and an external input voltage source that is an external voltage supply. According to the present invention, the difference of voltages applied to both drain and source terminals of a switch (SW2) for applying a sustain discharge voltage (Vsus) is minimized at the time when the switch (SW2) is switched, so that switching can be stabilized by preventing hard switching from being generated when the sustain discharge voltage is applied to a panel.

Abstract: An energy recovery circuit for a plasma display panel (PDP) according to the present invention includes an energy recovery unit recovering and storing energy from the PDP; and a switching stabilizing unit electrically connected to the energy recovery unit to stabilize switching of a sustain discharge pulse applied to the PDP. The switching stabilization unit may include one diode, two switches and one capacitor for energy recovery, or include two switches and an external input voltage source that is an external voltage supply. According to the present invention, the difference of voltages applied to both drain and source terminals of a switch SW2 for applying a sustain discharge voltage Vsus is minimized at the time when the switch SW2 is switched, so that switching can be stabilized by preventing hard switching from being generated when the sustain discharge voltage is applied to a panel.

Abstract: Disclosed are a driving circuit of a plasma display panel (PDP) driving circuit and a driving method thereof, which can simplify the driving circuit and stably secure a sustain discharge waveform. The PDP includes a first electrode applying a ramp-up voltage, a ramp-down voltage, a scan pulse voltage and a sustain discharge voltage; a second electrode applying a ground voltage GND and a level voltage of a second electrode; and a third electrode applying a data voltage for selecting discharge cells in an address period. In the driving method using a driving waveform divided into a reset period, an address period and a sustain period, positive and negative sustain discharge voltages are alternately applied to the first electrode and the ground voltage GND is applied to the second electrode in the sustain period.

Abstract: A method of driving a plasma display panel is disclosed, in which the plasma display panel includes one frame divided into a plurality of subfields, the subfield being classified into a reset period, an address period, and a sustain period in order to display a gray scale of the panel by discharge of the subfields. The method includes gradually decreasing a voltage level of a scan electrode at a ending point of ramp-down in each reset period, a voltage level of a scan pulse applied to a selected scan electrode in the address period, or a voltage level of a sustain electrode according to progress of the subfields, thereby improving a stable and rapid address discharge characteristic of the plasma display panel and increasing luminance and contrast ratio of the plasma display panel by obtaining a sufficient sustain discharge time.