Samsung Sdi Co., Inc.

Sang-Chul Kim

Hak-Ki Choi

Sang-Hun Park

Suk-Ki Kim

Kwang-Ho Jin

Tae-Kyong Kwon

Eun-gi Heo

Kwan-Il Oh

Ji-seung Yoo

Seung-Pil Mun

Sun-Kyung Ahn

In a plasma display device, a secondary coil of a transformer is connected across a panel capacitor formed by a scan electrode and a sustain electrode performing a sustain discharge. The plasma display device uses resonance between a secondary coil of a transformer and a panel capacitor to apply a sustain discharge pulse to a scan electrode and a sustain electrode in a sustain period.

Plasma display device and driving apparatus thereof

A PDP driving circuit for a stable operation of a ramp pulse. A capacitor having a temperature characteristic opposite to a temperature characteristic of a part coupled to a switch that operates as a constant current source for generation of a ramp pulse is arranged in the driving circuit for generating a ramp pulse. The ramp pulse linearly increases or decreases a panel voltage of the PDP with respect to time. Parts having opposite temperature characteristics are coupled in parallel to control variation of a gradient of the ramp pulse so that values of the parts may not be varied depending on the temperature changes. Thus, stable operation of the ramp pulse is obtained.

Plasma display panel driving circuit

A method for displaying gray levels in a PDP by generating gray data corresponding to externally input image signals and displaying the gray data on the PDP is disclosed. The method comprises generating reference signals based on the image signals, determining a spread filter value according to states of the reference signals, applying the spread filter value to the gray data and generating final gray data, and displaying the final gray data on the PDP. The present invention reduces contour noise generated between moving pictures' adjacent grays.

Gray display method and device for plasma display panel

A method for driving a plasma display panel having a front substrate and a rear substrate facing and spaced apart from each other, and n common electrode lines, n scan electrode lines, and m address electrode lines arranged between the front and rear substrates (m and n are integers greater than 1), the common electrode lines and the scan electrode lines being parallel to each other, the address electrode lines being orthogonal to the scan electrode lines, to define pixels at respective intersections, the method including, (1) in order to distribute the n common electrode lines to k common electrode groups (k is an integer of greater than or equal to 2), setting (p&plus;k&middot;j)th common electrode lines in the p-th common electrode group (p is an integer and at least 1 and j is any integer, (2) dividing a unit frame to be displayed into k subfields, and (3) applying a relatively high discharge voltage to the electrode lines of the p-th common electrode group in the p-th subfield, among respective subfields, thereby erasing wall charges formed at the pixels and forming uniform space charges.

Method for driving plasma display panel

An apparatus for driving a three-electrode alternating current (AC) surface discharge plasma display panel (PDP) includes a scanning driver, an address driver, a common driver and a controller. The scanning driver, in which a scanning circuit is combined with a discharge sustaining circuit with respect to each of the scan electrode lines, applies scanning signals to 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 also applies discharge sustaining signals to scan electrode lines in response to discharge sustain data during a sustain-discharge period for generating light at the selected pixels.

Apparatus for driving plasma display panel

A method for addressing a plasma display panel in which scan electrode lines are arranged parallel with one another and address electrode lines are arranged orthogonal to the scan electrode lines, defining corresponding pixels at the respective intersections, the method including grouping the scan electrode lines into at least two scan electrode groups each group having an equal number of scan electrode lines, sequentially applying a preliminary pulse having a first polarity and a scanning pulse having a second polarity, opposite to the first polarity, to the respective scan electrode groups, wherein while the preliminary pulse is applied to a scan electrode line of a first scan electrode group, the scanning pulse is applied to the scan electrode line immediately preceding the scan electrode line of the second scan electrode group corresponding to the scan electrode line of the first scan electrode group, and applying corresponding image data signals to all address electrode lines while the scanning pulse of the second polarity is applied to the respective scan electrode groups.

Method for addressing plasma display panel

A method for driving a surface discharge type plasma display panel (PDP) having a matrix display form is provided. The surface discharge type PDP is driven by a progressive driving method such that non-discharge regions are removed by combining common and scanning electrodes traversing neighboring discharge cells or two neighboring scanning electrodes into one. While the scanning electrodes traversing neighboring discharge cells are reduced to one to be used in common, sequential scanning is allowed. Thus, the number of driver circuits can be reduced. Also, since the distance between electrodes of the respective lines can be reduced, a high-precision PDP can be achieved by reducing a line pitch. Also, the ratio of the area occupied by display electrodes in a unit emission region is increased and the range in which a surface discharge occurs is extended, thereby improving the luminance.

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Cheonan, South Korea

Sang-Chul Kim