Method for driving three electrode surface discharging AC type plasma display screen

Abstract

A method of driving a plasma display panel is disclosed in which initialization is performed securely and the background light emission is reduced. As an operation for the initialization, an obtuse waveform pulse is applied to all cells three times. In the first obtuse waveform pulse application, discharge is generated only in the previously lit cell, so that the wall voltage thereof approaches the wall voltage in the previously unlit cell. In the second obtuse waveform pulse application, discharge is generated in the previously lit cell and in the previously unlit cell, so that the wall voltage in these cells changes to a value within an appropriate range. In the third obtuse waveform pulse application, discharge is generated in the previously lit cell and in the previously unlit cell, so that the wall voltage of these cells changes to a preset value.

Description

technical field [0001] The invention relates to a method for driving a plasma display panel (PDP), and is suitable for surface discharge type and AC type PDP. The surface discharge type refers to the structure in which the display electrodes are arranged in parallel on the front or rear substrate. In this structure, the display electrodes are the anode and cathode (first electrode and second electrode) used to ensure the brightness level during the display discharge process. One problem with AC-type PDPs is backlight emission, which is light emission in areas of the screen that are not illuminated. Background technique [0002] FIG. 1 shows a cell structure of a typical surface discharge type PDP. The PDP 1 includes a pair of substrate structures (including a substrate and unit elements arranged on the substrate). The front substrate structure includes a glass substrate 11 and multiple sets of display electrodes X and Y arranged on the inner surface of the glass substrate ...

AI Technical Summary

Problems solved by technology

However, an increase in amplitude increases the amount of undesired light emission and reduces contrast

[0017] In general, for the amount of write wall voltage in previously unilluminated cells, the problem is that it is difficult to determine the optimum value compatible between performing initialization reliably and reducing backlight emission

This makes addressing of previously illuminated units indeterminate and causes incorrect lighting or incorrect extinguishing

[0035] As explained above, it is very difficult to determine a lower limit on the number of wall voltage writes in previously unilluminated cells while controlling the complex discharge in the three-electrode structure

Therefore, the darkroom contrast ratio of PDP displays has not been sufficiently improved

In addition, if it is only considered important to improve the contrast in the dark room, incorrect lighting is prone to occur, which makes the display very unstable

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