Plasma display driving method and apparatus
View Patent ↗A plasma display driving method and apparatus that can reduce the occurrences of dropout, on a displayed image, caused by misaddress when the environment temperature becomes low. In the inventive plasma display, the environment temperature is determined, and during a charge adjustment interval, the ultimate voltage, which the drive waveform of a scan electrode voltage reaches at the end after continuously varying in the negative direction, is changed in accordance with the determined environment temperature in such a manner that if the environment temperature becomes lower, the ultimate voltage is directed in the positive direction.
1. A driving method of a plasma display having multiple parallel first and second electrodes mutually and adjacently placed with respect to each other, multiple third electrodes placed to intersect with the first and second electrodes, a discharge cell prescribed in a cross region of each of the electrodes, and including a reset interval, an address interval and a sustained discharge interval the method comprising the steps of:
in the reset interval, applying a positive pulse to the second electrode, and then applying slope waveform which decreases an applied voltage value over time to the second electrode;
detecting environment temperature of the plasma display; and
raising an ultimate raising a reached potential of the slope waveform by decreasing an inclination thereof in accordance with a voltage change value per unit time when the environment temperature falls, and lowering the reached potential of the slope waveform by increasing the inclination thereof when the environment temperature rises.
2. The driving method of a plasma display according to claim 1 , wherein the reached potential of the slope waveform is higher than a negative voltage which is applied to the second electrode during the address interval even though the environment temperature rises.
3. The driving method of a plasma display according to claim 1 , wherein the slope waveform sustains the reached potential for a predetermined interval when arriving at the reached potential.
4. The driving method of a plasma display according to claim 3 , wherein a fixed voltage having a different voltage value is applied to the each of the first and third electrodes during an applied interval of the slope waveform.
5. The driving method of a plasma display according to claim 4 , wherein the positive pulse is a pulse which increases an applied voltage value over time, a negative fixed voltage is applied to the first electrode during an applied interval of the positive pulse to the second electrode, and a positive fixed voltage is applied to the first electrode during an applied interval of the slope waveform.