Plasma display panel and drive method for plasma display panel

Abstract

A drive method for a plasma display panel provides a first mode in which a display is performed by applying sustained pulses the number of which corresponds to luminance weights of a plurality of subfields, a second mode in which one field period is constituted by a smaller number of subfields than those in the first mode and the number of the sustained pulses is set to be larger than the number of the sustained pulses in the first mode to perform a display, and a third mode in which the write time for a non-lighting line in the second mode is shortened and the shortened time is set as a sustained period to perform a display, wherein the transfer from the first mode or second mode to the third mode occurs when the lighting rate of the subfields is below a predetermined value, the gradation of an image is above a predetermined value, and when the number of the lighting lines of each subfield is below a set line number.

Description

technical field [0001] The present invention relates to a plasma display panel that improves the contrast of the plasma display panel and a method for driving the plasma display panel. Background technique [0002] A plasma display panel (hereinafter also simply referred to as a "panel") is a self-luminous display device utilizing electric discharge, which is characterized by a large screen, thin shape, and light weight. As a display method for displaying a moving image with halftones using this panel, a so-called subfield method is generally used. In the sub-field method, one field period is divided into a plurality of binary images (binary images) each having a weighted luminance, and these are overlapped temporally to display a moving image. [0003] In the sub-field method, the following panel driving method has been developed: as long as the entire screen does not become dark, the number of times of light emission is increased in the same proportion on the entire scree...

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Problems solved by technology

[0004] In addition, in the prior art, in order to achieve an increase in contrast, the number of subfields is reduced so that the writing time is the same between the lit line and the non-lit line (for example, refer to Patent Document 2).

[0005] However, in the conventional structure, since the writing time is made the same between the lit and non-lit lines, it is necessary to further reduce the number of subfields in order to improve the contrast based on the conventional method.

If the number of subfields is reduced, the display gray scale will be reduced compared with the conventional method, and there is a problem that the display quality will be lowered

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