Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2011-05-31
2011-05-31
Nguyen, Chanh (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
Reexamination Certificate
active
07952539
ABSTRACT:
The present invention relates to a driving apparatus for supplying a driving signal to a plasma display panel, and a plasma display apparatus employing the same. A reset signal supplied during a reset period of a first subfield of a plurality of subfields includes a first rising period where a voltage rises up to a first voltage, and a first sustain period where the first voltage is sustained. A reset signal supplied during a reset period of a second subfield includes a second rising period where a voltage rises up to a second voltage lower than the first voltage, and a second sustain period where the second voltage is sustained. The second voltage is higher than a sustain voltage. In accordance with the present invention, if it is sought to reset discharge cells of a PDP in a reset period, a signal whose voltage gradually rises up to a voltage higher than the sustain voltage is applied to a scan electrode. Accordingly, wall charges of the scan electrode for addressing can be controlled effectively, the highest voltage of the reset signal can be lowered and, therefore, driving margin can be secured. Further, since the sustain period of the highest voltage is included, stabilized discharge can be generated irrespective of variation of an APL of a display screen.
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Korean Office Action dated Mar. 10 2009.
Choi Jeong Pil
Kang Seong Ho
KED & Associates LLP
LG Electronics Inc.
Nguyen Chanh
Pham Long
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