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Plasma display panel drive method and plasma display device

A technology for display panels and driving methods, applied to static indicators, instruments, etc., which can solve problems such as voltage rise, unstable write discharge, and image display quality deterioration

Inactive Publication Date: 2008-03-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, recently, with the increase in screen size and brightness of panels, narrow erasing discharge tends to be unstable, which leads to instability of address discharge, and no address discharge occurs in the discharge cells that should be displayed. As a result, image display quality deteriorates, or problems such as voltage rise required for write discharge occur.

Method used

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  • Plasma display panel drive method and plasma display device
  • Plasma display panel drive method and plasma display device
  • Plasma display panel drive method and plasma display device

Examples

Experimental program
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no. 1 approach

[0047]Fig. 1 is an exploded perspective view showing important parts of a panel used in a first embodiment of the present invention. The panel 10 has a structure in which a glass front substrate 21 and a rear substrate 31 are arranged facing each other, and a discharge space is formed therebetween. A plurality of pairs of scan electrodes 22 and sustain electrodes 23 forming display electrode pairs are formed on the front substrate 21 parallel to each other. Furthermore, a dielectric layer 24 is formed so as to cover the scan electrodes 22 and the sustain electrodes 23 , and a protective layer 25 is formed on the dielectric layer 24 . In addition, a plurality of data electrodes 32 covered by an insulator layer 33 are disposed on the back substrate 31 , and a well-shaped barrier rib 34 is disposed on the insulator layer 33 . In addition, the fluorescent layer 35 is provided on the surface of the insulator layer 33 and the side surfaces of the barrier ribs 34 . Front substrate ...

no. 2 approach

[0096] The panel structure in this embodiment is the same as that in the first embodiment, and thus description thereof will be omitted. Also, the circuit blocks of the plasma display device are the same as those in FIG. 3 , but the lighting ratio calculation circuit 58 compares the lighting ratios between subfields having the same luminance weight in the current field and the previous field. Then, timing generation circuit 55 controls the timing signal supplied to sustain electrode drive circuit 54 based on the comparison result in lighting rate calculation circuit 58 and the detected lighting rate.

[0097] FIG. 10 is a diagram showing the relationship among subfields, lighting ratios, and erasing phase difference Th1 in the second embodiment of the present invention. In the first SF to the fourth SF, the erasing phase difference Th1 is controlled to be 150 ns regardless of the lighting rate. On the other hand, in the 5th SF to the 10th SF, the phase difference Th1 is switc...

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Abstract

In a plasma display panel drive method, one field is formed by a plurality of sub fields each having a write period for selectively generating write discharge by a discharge cell and a sustain period for generating sustain discharge the number of times based on the luminance weight by the discharge cell which has generated the write discharge. During the sustain period, after voltage for generating the last sustain discharge is applied to a display electrode pair, a voltage for mitigating the potential difference between the electrodes of the display electrode pair is applied to the display electrode pair at a time interval in accordance with the ON rate of the discharge cell in the sub field. With this configuration, it is possible to generate stable write discharge without increasing the voltage required for generating write discharge even for a large-screen and high-luminance panel.

Description

technical field [0001] The present invention relates to a driving method of a plasma display panel and a plasma display device. Background technique [0002] In a typical AC surface discharge type panel that is a plasma display panel (hereinafter referred to as a "panel"), a plurality of discharge cells are formed between a front panel and a rear panel that are arranged to face each other. In the front panel, a plurality of display electrode pairs consisting of a pair of scan electrodes and sustain electrodes are formed parallel to each other on the front glass substrate, and a dielectric layer and a protective layer covering these display electrode pairs are formed. In the back panel, a plurality of parallel data electrodes, a dielectric layer covering the data electrodes, and a plurality of barrier ribs parallel to the data electrodes are formed on the rear glass substrate, and a phosphor layer is formed on the surface of the dielectric layer and the sides of the barrier r...

Claims

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Application Information

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IPC IPC(8): G09G3/288G09G3/20G09G3/28G09G3/291G09G3/292G09G3/296G09G3/298
Inventor 庄司秀彦折口贵彦植田光男吉滨豊木子茂雄
Owner PANASONIC CORP