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Driving method for plasma display panel, and plasma display device

A technology of display panel and driving method, which is applied to static indicators, instruments, etc., and can solve problems such as unstable and unstable writing discharge

Inactive Publication Date: 2012-11-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is also a problem in that the wall charge in the discharge cell that performs the address operation at the end of the address period is significantly reduced compared with the discharge cell that performs the address operation at the beginning of the address period, and the address discharge easily become unstable

Method used

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  • Driving method for plasma display panel, and plasma display device
  • Driving method for plasma display panel, and plasma display device
  • Driving method for plasma display panel, and plasma display device

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Experimental program
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Effect test

Embodiment approach 1

[0039] figure 1 It is an exploded perspective view showing the structure of the panel 10 in Embodiment 1 of this invention. On front panel 21 made of glass, a plurality of display electrode pairs 24 including scan electrodes 22 and sustain electrodes 23 are formed. Furthermore, dielectric layer 25 is formed to cover scan electrodes 22 and sustain electrodes 23 , and protective layer 26 is formed on dielectric layer 25 .

[0040] In addition, in order to reduce the discharge start voltage in the discharge cell, the protective layer 26 is formed of a material mainly composed of MgO, which is effective as a panel material. In this case, the secondary electron emission coefficient is large and the durability is excellent.

[0041] A plurality of data electrodes 32 are formed on rear plate 31 , dielectric layer 33 is formed to cover data electrodes 32 , and grid-shaped partition walls 34 are further formed thereon. Phosphor layers 35 that emit light of each color of red (R), gre...

Embodiment approach 2

[0134] The luminance in each subfield can be represented by the following equation. Hereinafter, the brightness generated by one discharge is referred to as "emission brightness", and the brightness obtained by repeated discharge is referred to as "brightness". (brightness of subfield)=(brightness based on sustain discharge generated in the sustain period of the subfield)+(light emission luminance based on address discharge generated in the address period of the subfield)

[0135] The discharge intensity of the address discharge varies with the number of address operations. This is because the wall charges decrease more as the elapsed time from the initializing operation to the writing operation becomes longer. Therefore, since the amount of decrease in wall charge is small for discharge cells that are performed earlier in the address operation, the discharge intensity of the address discharge is stronger, and the luminance of light emitted by the address discharge is also re...

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Abstract

The invention provides a driving method for a plasma display panel, and a plasma display device. An image displaying area of the plasma display panel is divided into multiple areas, and partial turn-on-rates for each of the areas are detected, and the partial turn-on-rate of the current subfield is made to be a first partial turn-on-rate; and a partial turn-on-rate that was used in the comparison of the high-low of partial turn-on-rates, in the same subfield as the current subfield in the field just before the field to which the current subfield belongs, is made to be a second partial turn-on-rate. Then, an absolute value of the difference between the first partial turn-on-rate and the second partial turn-on-rate is calculated for each of the areas; and in areas where that value becomes equal to or more than a turn-on-rate threshold value, the first partial turn-on-rate will be used in the comparison of the high-low of partial turn-on-rates to be conducted in the current subfield; and in areas where that value becomes less than the turn-on-rate threshold value, the second partial turn-on-rate will be used in the comparison of the high-low of partial turn-on-rates to be conducted in the current subfield. Therefore, the driving method for the plasma display panel prevents the necessary scanning pulse voltage (amplitude) from increasing, and generates stable writing discharges, to achieve high image-displaying quality.

Description

technical field [0001] The present invention relates to a driving method and a plasma display device for a plasma display panel used for a wall-mounted TV or a large monitor. Background technique [0002] In a typical AC surface discharge type panel as a plasma display panel (hereinafter, simply referred to as "panel"), a plurality of discharge cells are formed between a front panel and a rear panel that are arranged to face each other. On 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. Then, a dielectric layer and a protective layer are formed to cover these display electrode pairs. On the rear plate, a plurality of parallel data electrodes are formed on a rear glass substrate, a dielectric layer is formed to cover these data electrodes, and a plurality of barrier ribs are formed in parallel with the data electrodes thereon. Then, a phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/28G09G3/20G09G3/288G09G3/291G09G3/293G09G3/296G09G3/298
CPCG09G2360/16G09G2340/16G09G2330/025G09G3/293G09G3/296G09G2310/0213G09G3/2022
Inventor 庄司秀彦折口贵彦富冈直之
Owner PANASONIC CORP
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