Patent ID: 6501445
Filing Date: 2002-12-31
Classification: G09G

Abstract:
An apparatus for driving a plasma display panel (PDP) having front and rear substrates to be separated and opposed to each other and having common, scan and address electrode lines between the front and rear substrates, the common electrode lines and the scan electrode lines being arranged in parallel, the address electrode lines being arranged to be orthogonal to the scan electrode lines, thereby defining pixels corresponding to the respective intersections, the apparatus comprising:a scanning driver in which a scanning circuit is combined with a discharge sustaining circuit with respect to each of the scan electrode lines, the scanning driver applying scanning signals to the scan electrode lines in response to scan data in a predetermined scanning order during an address period for forming wall charges at pixels to be selected and applying discharge sustaining signals to the scan electrode lines in response to discharge sustain data during a sustain-discharge period for generating light at the selected pixels; an address driver for applying address signals to the address electrode lines in response to an input display data signal; a common driver for applying common signals to the common electrode lines in response to an input common data signal; and a controller for processing externally input image data and generating the scanning data, the discharge sustain data, the display data signal and the common data signal; wherein the scanning circuit of the scanning driver comprises: a scanning shift register with outputs, the number of outputs being equal to that of the scan electrode lines, the scanning shift register sequentially outputting the scan data from the controller through the outputs of the scanning shift register during the address period; and a switching circuit for scanning which selectively applies a scanning voltage to the scan electrode lines in response to the scan data from the outputs of the scanning shift register during the address period; and wherein the discharge sustaining circuit of the scanning driver comprises: a discharge sustaining shift register with outputs, the number of outputs being equal to that of the scan electrode lines, the discharge sustaining shift register sequentially outputting the discharge sustain data from the controller through the outputs of the discharge sustaining shift register during the sustain-discharge period; and a switching circuit for sustaining discharge with charge/discharge means for recovering and using capacitive power consumption between the common electrode lines and the scan electrode lines, the switching circuit for sustaining discharge applying a discharge sustaining voltage to the scan electrode lines in response to the discharge sustain data output from the outputs of the discharge sustaining shift register during the sustain-discharge period.