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Plasma display device and method of driving plasma display panel

A display panel and display device technology, applied to static indicators, color TV parts, TV system parts, etc., can solve problems such as difficult writing operation, increased wall charge disappearance, and unstable writing discharge

Inactive Publication Date: 2011-08-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, it is difficult to perform a stable address operation only by the technique of stabilizing the operation of the data electrode driving circuit disclosed in Patent Document 1. Therefore, stabilization of the operation is sought in a circuit (scan electrode driving circuit) that drives the scan electrodes. technology is also important
[0011] In addition, since the scan pulse voltage is applied to the scan electrodes sequentially in the write period, especially in a high-definition panel, the time consumed in the write period becomes longer due to the increase in the number of scan electrodes.
Therefore, in the discharge cell in which the address operation is performed at the end of the address period, wall charge disappearance increases compared with the discharge cell in which the address operation is performed first in the address period, and the address discharge tends to become ineffective. stability problem

Method used

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  • Plasma display device and method of driving plasma display panel
  • Plasma display device and method of driving plasma display panel
  • Plasma display device and method of driving plasma display panel

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0040] 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 body layer 25 .

[0041] In addition, in order to reduce the discharge start voltage in the discharge cell, the protective layer 26 is formed of a material that is effective as a panel material, and when neon (Ne) and xenon (Xe) gases are enclosed, twice MgO is a material mainly composed of MgO, which has a large electron emission coefficient and excellent durability.

[0042] A plurality of data electrodes 32 are formed on rear plate 31 , and dielectric layer 33 is formed to cover data electrodes 32 , and grid-shaped partition walls 34 are further formed on dielectric ...

Embodiment approach 2

[0128] In this embodiment, as described in Embodiment 1, in a subfield in which the ratio of the luminance weight to one field is greater than or equal to a predetermined ratio, or in a subfield in which the number of sustain pulses generated in a sustain period is greater than or equal to a predetermined number, as described in Embodiment 1, based on As a result of the detection in the partial lighting rate detection circuit, the scanning ICs are sequentially switched and operated so that the write operation is performed first from the region with the higher partial lighting rate. In addition, in a subfield in which the ratio of the luminance weight to one field is smaller than a predetermined ratio, or in a subfield in which the number of sustain pulses generated in a sustain period is smaller than a predetermined number, scan pulses are applied to scan electrodes SC1 through SCn in a predetermined order. The write operation is performed with the voltage Va. For example, sca...

Embodiment approach 3

[0154] In the above-mentioned embodiment, the operation of determining the order of the write operation of each area based on the detected partial lighting rate in the drive (hereinafter referred to as "one-phase drive") in which the initialization operation is performed only in the initialization period has been described. Such a configuration, but the present invention is not limited to this configuration.

[0155] The wall charges formed in the discharge cells by the initializing discharge in the initializing period gradually decrease over time. For this reason, the later the sequence of the address operation in the discharge cell, the more wall charges are reduced, and accordingly, the scan pulse voltage (amplitude) required to generate a stable address discharge also increases. In particular, in the high-definition panel 10, since the time required for the address operation becomes longer due to the increase in the number of scan electrodes 22, the wall charges in the dis...

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PUM

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Abstract

A plasma display device wherein a stable writing discharge is caused and a high image display quality is achieved. The plasma display device comprises a plasma display panel, a scan electrode drive circuit for performing a write operation by applying a scan pulse to a scan electrode during a writing period, and a partial on ratio detection circuit for detecting the ratio of the number of discharge cells to be operated to the total number of discharge cells as a partial on ratio for each subfield in each of a plurality of regions into which the display region of the plasma display panel is divided. The scan electrode drive circuit performs a first initialization during an initialization period, performs a second initialization during the writing period, performs a write operation for the region at the highest one of the partial on ratios detected by the partial on ratio detection circuit immediately after the first initialization, and performs a write operation of a region at the second highest partial on ratio immediately after the second initialization.

Description

technical field [0001] The invention relates to a plasma display device and a driving method of a plasma display panel used in a wall-mounted television or a large monitor. Background technique [0002] In a typical AC surface discharge type panel of a plasma display panel (hereinafter simply 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. 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, and a dielectric layer and a protective layer are formed to cover these display electrode pairs. On the back panel, a plurality of parallel data electrodes, a dielectric layer covering these data electrodes, and a plurality of barrier ribs parallel to the data electrodes formed on the dielectric layer are formed on the rear glass substrate, and on the surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/28G09G3/20H04N5/66G09G3/288G09G3/291G09G3/292G09G3/293G09G3/296G09G3/298
CPCH04N5/66G09G2360/16G09G3/293G09G2310/066G09G2320/0228G09G3/2927G09G2310/0218G09G3/296G09G3/291
Inventor 折口贵彦庄司秀彦齐藤朋之
Owner PANASONIC CORP