CN1941042A - 等离子显示设备及其驱动方法 - Google Patents

等离子显示设备及其驱动方法 Download PDF

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CN1941042A
CN1941042A CNA200610141506XA CN200610141506A CN1941042A CN 1941042 A CN1941042 A CN 1941042A CN A200610141506X A CNA200610141506X A CN A200610141506XA CN 200610141506 A CN200610141506 A CN 200610141506A CN 1941042 A CN1941042 A CN 1941042A
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voltage level
voltage
cycle
electrode
discharge
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CN100481175C (zh
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郑文植
文宁涉
权昶荣
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LG Electronics Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
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    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
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    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/298—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels using surface discharge panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
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    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
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    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/292—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
    • G09G3/2922—Details of erasing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/293—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
    • G09G3/2932—Addressed by writing selected cells that are in an OFF state

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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract

本发明涉及一种等离子显示设备及其驱动方法。由于在该维持周期结束后、该复位周期开始之前，壁电荷被保留而不进行额外的清除放电，在该复位周期期间利用小的电压可产生建立放电，以获得该驱动电压余量。尤其是，由于在其它子场期间的该复位周期的最高电压低于实现低灰度等级的子场的该复位周期的最高电压，在其它子场中产生放电前引起半放电，可利用低电压产生建立放电，以由于亮度输出减少而改善对比度。

Description

等离子显示设备及其驱动方法
技术领域
本发明涉及一种等离子显示设备及其驱动方法，尤其是，涉及一种施加到扫描电极和维持电极上以在前一个子场(subfield)的维持周期结束后产生大量壁电荷(wall charges)的等离子显示设备的驱动波形。
背景技术
等离子显示面板是一种图像显示设备，其中在形成有阻挡条(barrier rib)的后基底和面对该后基底的前基底之间形成有放电单元，通过用真空紫外线激励荧光物质来显示图像，该真空紫外线在利用高频电压对每个放电单元中的惰性气体放电期间产生。
通常，等离子显示面板利用在从等离子体辐射经过气体放电获得的真空紫外线VUV激励该荧光物质时产生的可见光例如红R、绿G、蓝B光来显示预定的图像。
利用施加到该扫描电极、维持电极和寻址电极的该驱动电压在放电单元内产生相对放电或表面放电时，等离子显示设备显示图像。这样，扫描电极、维持电极和寻址电极被分别连接到扫描驱动器、维持驱动器和寻址驱动器上。
此外，该扫描驱动器、维持驱动器和寻址驱动器将一个帧分成一个或多个子场。每个子场包括复位(reset)周期、寻址周期和维持周期，当在复位周期中施加用于初始化该放电单元的建立信号和撤除信号时，由于施加到该扫描电极的扫描脉冲和施加到该寻址电极的数据脉冲之间的电压差异，在寻址周期中选择该放电单元，在该维持周期向扫描电极和维持电极交替地施加该维持脉冲，从而可在该选择的放电单元中维持放电。
此外，通常，在该维持周期和该复位周期之间，即，在该维持周期结束之后，施加清除(erase)脉冲，其在清除周期期间产生清除放电用于清除壁电荷。
也就是说，在该清除周期中，在从低电位电压电平逐渐增加到该正极电压电平的该清除脉冲被施加到该维持电极以产生清除放电时，在该扫描电极和该寻址电极中保持低电位电压电平。从而单元上的壁电荷被清除成接近0V。
由于该原因，在传统的等离子显示设备驱动方法中，不得不施加上升至一高电压电平的建立信号，以便在该清除周期之后的子场的复位周期期间产生放电。因此，存在的问题是，需要产生强烈的无光放电(dark discharge)以增加发光输出，同时在整个面板显示的图像的对比度降低。
此外，如果在该清除周期期间不稳定地产生该清除放电，在下一个复位周期开始之前，单元内的壁电荷分布变得不均匀，从而产生错误放电。因此，存在驱动余量变窄的问题。
发明内容
因此，本发明的一个目的是要解决至少背景技术中的问题和缺点。
本发明提供了一种等离子显示设备，其能够提高对比度，并通过在第一子场之后的多个子场之一的复位周期期间诱发半放电(halfdischarge)获得一驱动余量，以扩展该驱动余量，降低用于产生放电所需的最高电压，用于改善由于强烈的无光放电导致的对比度下降的问题。
根据本发明的等离子显示设备包括由多个子场驱动的扫描电极、维持电极和寻址电极，该子场在一帧中包括至少一个复位周期、寻址周期和维持周期，在具有正极性的第一电压电平和电压值逐渐增加的电压增加周期的第一电压电平周期的建立信号施加到至少一个接下来的子场中的该扫描电极的时候，第一子场的最后维持脉冲被施加到该维持电极，当施加该建立信号时，向该维持电极施加正极性的第二电压电平。
根据本发明，在该第一电压电平电压之后提供该第二电压电平电压，这两个电压的施加时刻之间的差异范围从0.2μs到2μs，该第二电压电平周期与部分该第一电压电平周期和部分该电压增加周期重叠。
前面的子场中的复位周期的最大电压电平高于该建立信号的最大电压电平，该建立信号的最大电压电平比该第一电压电平高50V至100V。
由该第一电压电平放电产生的发光量是在相同子场的维持周期中利用一次维持放电的发光量的一半不到，其称作“半放电”。
也就是说，在该第一子场之后的复位周期期间，向该扫描电极施加第一电压电平以在扫描电极Y和维持电极Z之间产生半放电，从而最优化单元内的壁电荷分布，虽然单元内的该壁电荷分布随着第二电压电平的增加而增加，因此，随着扫描电极电压的逐渐增加，能够仅仅利用小的电压产生建立放电。
此外，在该维持周期期间提供的最后的维持脉冲被施加到该维持电极，以结束第n子场，虽然第n+1子场的复位周期开启而不需要额外的清除周期。
附图说明
接下来，将参照附图详细说明本发明，其中，相同的数字表示相同的元件。用于进一步理解本发明并包括组成说明书一部分的该附图说明本发明的实施例，并与该说明一起用于解释本发明的原理。附图中：
图1表示等离子显示面板的结构；
图2表示等离子显示设备的配置；
图3表示第一子场中提供的驱动波形；
图4表示利用图3的驱动波形改变的放电单元的壁电荷分布；
图5表示在第一子场后的该子场中提供的驱动波形；
图6表示利用图5的驱动波形改变的放电单元的壁电荷分布。
具体实施方式
以下将参照附图以更加详细的方式说明本发明的优选实施例。
图1是说明本发明的面板结构P的附图。前基底A和后基底B接合形成该面板。
扫描电极1和维持电极2形成在该前基底A中。寻址电极6形成在该底板基底B中，同时，该扫描电极、维持电极和寻址电极6在单元内交叉。
该扫描电极1和维持电极2分别包括透明电极1b、2b和总线电极1a、2a。该透明电极由称作铟锡氧化物ITO的痕量(trace amount)氧化锡和氧化铟组成。透射率如此高以致于单元内产生的光能够发射到外部。此外，提供总线电极1a、2a以降低该透明电极的表面阻抗。
将介电层3形成在该扫描电极1和维持电极2上，同时还形成保护薄膜4用于保护该介电层3。
将介电层8形成在该寻址电极6上。在该介电层上，还形成有以行/列分隔该放电单元的阻挡条(barrier rib)7和涂覆在该介电层8和阻挡条7上的R、G、B荧光物质9。
此时，根据本发明的等离子显示面板结构不受图1的限制。
例如，该扫描电极1和维持电极2可以是仅仅包括总线电极1a、2a而不包括由ITO组成的透明电极1b、2b的无ITO结构。虽然没有举例说明，其还可以是集成的BM结构，其中黑矩阵(black matrix)BM形成在该前基底A上作为一个整体。
此外，该扫描电极1和维持电极2可以由2条或多条电极线组成，可包括其它电极。
形成在该后基底B上的该阻挡条结构是封闭型的，其封闭该放电单元，如图1所示。但其不限于这种类型，还可是条型的，其中特定方向的阻挡条被省略。此外，其还可是鱼骨架(fish bone)型，其中在列阻挡条7中以预定间隔形成突起。
图2说明了向形成在面板P中的电极施加驱动信号的数据驱动器12、扫描驱动器13和维持驱动器14。
参照图2，设置有用于向形成在面板中的寻址电极X1至Xm提供数据的数据驱动器12、用于驱动扫描电极Y1至Yn的扫描驱动器13、用于驱动维持电极Z的维持驱动器14和用于控制每个驱动器12、13、14的开关时间的控制器11。
该数据驱动器12向该寻址电极X1至Xm提供数据脉冲用于导通单元(on cell)和截止单(off-cell)元的选择。
在图2中，示出了该寻址电极X1至Xm利用单独的没有区分的扫描方法来驱动。然而，本发明不限于这种方式，应当注意到本发明的寻址电极能够利用双重(dual)扫描方法使用，其将寻址电极分成2个或多个，并向与每个划分的寻址电极组交叉的第一扫描电极线Y1至Ym和第二扫描电极线Yn-m至Yn施加驱动信号。
此外，能够实现包括2个或多个数据驱动器的结构。该数据驱动器将该寻址电极X1至Xm分成奇数寻址电极X1、X3…Xm-1组和偶数寻址电极X2、X4…Xm组，向每个组施加驱动信号。
在该控制器11的控制下，该扫描驱动器13在该复位周期RP提供逐渐上升的建立信号PR和逐渐下降的撤除信号NR，依次向该扫描电极Y1至Yn提供扫描脉冲用于选择该扫描线，在维持周期SP期间提供维持脉冲用于在选择的导通单元内保持放电，其中在寻址周期AP向该扫描线提供数据。
在维持周期SP期间，该维持驱动器14和扫描驱动器13交替工作。该维持驱动器14向该维持电极提供维持脉冲。
该控制器11接收垂直/水平同步信号和时钟信号以产生每个驱动器12、13、14所需的时序控制信号CTRX、CTRY、CTRZ，提供时序控制信号CTRX、CTRY、CTRZ到相应的驱动器以控制该驱动器。
下面将参照附图3至5说明由组成一帧的多个子场中由每个驱动器12、13、14提供的该驱动波形。图3说明了第一子场中的驱动波形。图5说明了在第一子场之后的多个子场中的一个子场的驱动波形。
此外，该第一子场表示用于在一帧图像期间实现最低灰度等级的子场，例如在一帧中首次定位的子场。
接下来，将参照图3说明在第一子场期间施加的该驱动波形，其包括复位周期RP1、寻址周期AP和维持周期SP。该复位周期包括扫描电极的电压电平上升的建立周期SU1和扫描电极的电压电平下降的撤除周期SD1。
在该复位周期RP1的建立周期SU1中，逐渐上升至复位电压Vr1的该建立信号PR1被施加到所有扫描电极Y。由于该建立放电由该建立信号PR1产生，则壁电荷逐渐堆积在内侧。
在该撤除周期SD1中，逐渐下降至负极性电压-Ve的该撤除信号NR被施加到该扫描电极以消除对于在放电单元内的寻址放电不必要的多余的壁电荷。同时，向该维持电极Z提供正极性电压。
在该寻址周期AP中，将从该扫描偏压Vyb下降到负极性的扫描电压-Vy的该扫描脉冲-SCNP依次施加到该扫描电极。同时，向该寻址电极X施加正极性的数据脉冲DP。这时，在该维持电极Z中保持正极性的偏压。因此，利用扫描脉冲-SCNP和数据脉冲DP之间的电压差异在寻址周期AP期间产生寻址放电以选择放电单元。
然后，在该维持周期SP中，将具有正极性维持电压Vs的该维持脉冲SUSP交替施加到该扫描电极Y和维持电极Z。因此，产生该维持放电以显示光。即，由于在该维持周期SP期间提供更多的维持脉冲SUSP增加了亮度输出，亮度被增强。
这时，向该维持电极Z提供第一子场中的最后维持脉冲SUSP，同时，如图5中所示，公开了下一个子场的复位周期RP2。即，通常在前一个子场和下一个子场的维持周期之间存在的用于清除大量壁电荷的清除周期在本发明中被省略。
同时，根据本发明该实施例的该驱动波形不限于图3中所示的波形，而该波形可进行各种变化。
例如，在图3中，说明了该建立信号PR1的启动电压和该撤除信号NR的启动电压基本上是相同的电压电平。然而，该上升启动电压可高于下降启动电压电平。相反，该上升启动电压电平低于下降启动电压电平。
同时，该建立信号PR1或该撤除信号NR是一种逐渐上升或下降、具有2个或多个斜坡、能够逐步上升或下降的波形。
除了图3中所示波形，可在该维持周期SP期间施加能够产生维持放电的其它信号。总之，该扫描电极和该维持电极间隔之间的电压差要求超过导致维持放电的点火(firing)电压。因此，半维持电压Vs和负极性的半维持电压-Vs/2以及该维持电压Vs和地电压0V可施加到每个电极。此外，正极性的该维持电压Vs可施加到一个电极上，同时负极性的维持电压-Vs可依次施加到其它电极上。
在图4中详细说明表示了在施加有图3所示的驱动波形的第一子场期间的单元内壁电荷状态。
根据本发明，单元中根据前一帧中向该维持电极Z施加的最后维持脉冲的壁电荷分布与图4a相同。即，大量正的壁电荷形成在该扫描电极Y中，同时，大量负的壁电荷形成在该维持电极Z中。
在这样的状态中，当该第一子场的建立周期SU1开始时，该扫描电极Y的电压从该维持电压电平Vs逐渐上升至比该维持电压电平Vs高的第一复位电压Vr1。
这时，该第一复位电压Vr1比该维持电压Vs高大约100V或更多。在整个屏幕的放电单元中，通过上升至第一复位电压Vr的该建立信号PR1，在该扫描电极Y和寻址电极X之间产生无光放电。同时，在该扫描电极Y和维持电极Z之间也产生无光放电。
由于该无光放电，在该建立周期SU1后立即在该寻址电极X和维持电极Z中保留有正极性的壁电荷，同时，在该扫描电极Y中保留有负极性的壁电荷，如图4b所示。
同时，由于在该上升周期SU1的大量开始之前不存在清除周期，在该放电单元中存在大量壁电荷，如图4a所示。因此，与传统的复位电压相比，该第一复位电压Vr1具有小的电压电平。即，在本发明的第一子场中，该建立放电能够利用小的电压来产生。
在整个屏幕的放电单元中，利用在该建立周期SU1之后的该撤除周期SD1期间提供的该撤除信号NR，在该扫描电极Y和寻址电极X之间产生无光放电，同时，在该扫描电极Y和维持电极Z之间也产生无光放电。由于该无光放电的结果，如图4c所示，在每个放电单元内的壁电荷分布改变成寻址放电可能的条件。
这时，在每个放电单元内，用于寻址放电的不必要的多余的壁电荷在该扫描电极Y和寻址电极X中被清除，同时，保留一些壁电荷。随着来自该扫描电极Y移动的负极性壁电荷的堆积，在该维持电极Z中的壁电荷极性从正极性转化成负极性。
如果在该复位周期RP1期间，将该间隙(gap)电压调整成接近点火电压的状态时开始该寻址周期AP，由于负极性的扫描脉冲-SCNP和数据脉冲DP，该间隙电压超过该扫描电极Y和寻址电极X之间的该点火电压，以产生寻址放电。
在该扫描电极Y和寻址电极X之间、在远离该扫描电极Y和维持电极Z之间的间隙的边缘附近首次产生寻址放电，在放电单元内产生起动(priming)放电粒子以在该扫描电极Y和维持电极Z之间引起二次放电，如图4d所示。结果，产生寻址放电的导通单元的壁电荷分布与图4e中的相同。
同时，不产生寻址放电的截止单元的壁电荷分布基本上保持图4c的状态。
在该维持周期SP中，将正极性维持电压Vs的维持脉冲SUSP交替施加到该扫描电极Y和维持电极Z，同时，如上所述，将最后的维持脉冲SUSP施加到维持电极Z。结果，在根据寻址放电所选择的导通单元中，如图4e所示，利用根据每个维持脉冲SUSP分布的壁电荷产生该维持放电。
相反，由于壁电荷分布在图4c状态的截止单元中，当第一正极性维持电压Vs施加到该扫描电极Y时，该扫描电极Y和维持电极Z之间的间隙电压不能超过该点火电压。因此，在维持周期SP期间不产生维持放电。
利用最后的维持放电在该放电单元中的壁电荷分布与图6a相同，下面与在图5的第一子场之后的预定子场期间施加的驱动波形相比进行解释。
在该第一子场期间施加图3中所示的驱动波形之后，在第2个SF至第N个SF的多个子场的至少一个期间施加图5中所示的该驱动波形。在图5的复位周期RP2期间施加的该建立信号SU2和撤除信号SD2的波形与在图3的复位周期RP1期间施加的波形不同。
包括该第一子场之后的第2个SF～第N个SF的子场的复位周期RP2包括第一、第二自由复位(free reset period)周期P1、P2和建立周期SU2、根据施加到该扫描电极Y和维持电极Z的波形的撤除周期SD2。
在该第一自由复位周期P1中，由于该第一电压电平的电压Vs被施加到该扫描电极Y，而0V被施加到该维持电极Z和寻址电极X，在该扫描电极Y和维持电极Z中产生半放电。利用该半放电发出的光量是在维持周期期间利用一次维持放电所发出的光量的一半或更少。
由于如图6b中的该半放电，该扫描电极Y和维持电极Z的壁电荷极性在每个放电单元中反转，同时，壁电荷量减少到图6a的壁电荷数量的一半或更少。因此，优选地，产生该半放电的该第一自由复位周期P1在从0.2μs到2μs范围的间隔内被保持。如果该第一自由复位周期P1保持在0.2μs以下，用于半放电的时间不够。在超过2μs的情况下，壁电荷被过度减少。因此，该第二复位电压Vr2的幅度增加，以减少该驱动余量。
在该第二自由复位周期P2中，当该扫描电极Y保持该第一电压电平时，将该第二电压电平的电压施加到该维持电极Z，同时向该寻址电极X施加0V。
在该维持电极Z的电位改变成该第二电压电平电压时，空间电荷累积在该顶板的介电层上，并且在该扫描电极Y和维持电极Z之间的壁电荷数量增加，如图6c所示。
在这种情况下，假定在该第一自由复位周期P1期间的该第一电压电平和第二电压电平基本上与在该维持周期SP期间施加的该维持脉冲SUSP的高电压电平Vs相同。
然后，在该建立周期SU2中，将从该第一电压电平逐渐上升到第二复位电压Vr2的该第二建立信号PR2施加给所有扫描电极Y。该第二复位电压的幅度比该第一电压电平Vs高50V至100V，比该第一子场的第1SF中的该第一复位电压Vr1低。
由于在该复位周期RP2之前不存在该清除周期，从而该壁电荷不会被清除，并由于该第一和第二自由复位周期P1、P2，在顶板的两个电极Y、Z中形成大量壁电荷，该建立放电在每个放电单元内可稳定地产生，虽然该第二建立信号PR2的最高电压是低的。这样，可降低该该第二复位电压Vr2。
由于该第二建立信号PR2，在整个屏幕的放电单元内，在该扫描电极Y和寻址电极X之间产生无光放电，同时，在该扫描电极Y和维持电极Z之间也产生无光放电。由于该无光放电，在该建立周期SU2之后，立即在该寻址电极X和维持电极Z中保留有正极性的壁电荷，同时，在该扫描电极Y中保留有负极性的壁电荷。
由于在该下降周期SD2期间的波形和驱动机构，该寻址周期AP和维持周期SP基本上与上述第一子场第1SF相同，因此省略其详细说明。
最后，在根据本发明的等离子显示设备中，在子场中的维持放电后清除大量壁电荷的清除周期可被省略，以在该复位周期之前在放电单元中留下大量壁电荷，从而可利用具有比传统的电压电平低的电压产生建立放电，以改善由于在该复位周期期间的无光放电而对比度下降的问题。
此外，仅仅在第一子场的复位周期RP1期间产生强的无光放电，同时，能够采用比其它子场的复位周期RP2期间的第一予场的电压较低的电压产生建立放电，从而改善对比度和驱动余量。
尤其是，由于在第一子场之后的子场的复位周期期间，在预复位周期P1中产生半放电，在该放电单元内均匀保留有许多壁电荷，以产生更加稳定的建立放电。
很显然，对于本领域技术人员，可对本发明作出各种改变和变化，而不会脱离本发明的精神或范围。因此，本发明意在涵盖附加的权利要求及其等价物的范围内提供的本发明的改变和变化。

Claims (12)

1.一种等离子显示设备，包括利用多个子场驱动的扫描电极、维持电极和寻址电极，该子场包括一帧中的复位周期、寻址周期和维持周期的至少一个；
其中，将前一个子场的最后维持脉冲施加到该维持电极，同时，在接下来的子场的至少一个子场中，将具有正极性的第一电压电平的第一电压电平周期和电压值逐渐增加的电压增加周期的建立信号施加到该扫描电极；
其中，在施加该建立信号时，将正极性的第二电压电平施加到该维持电极。
2.根据权利要求1所述的设备，其中该前一个子场是一帧的第一子场。
3.根据权利要求1所述的设备，其中在该第一电压电平电压之后提供该第二电压电平电压。
4.根据权利要求3所述的设备，其中施加该第一电压电平电压的初始时刻和施加该第二电压电平电压的初始时刻之间的差异范围从0.2μs至2μs。
5.根据权利要求1所述的设备，其中该第二电压电平周期与该第一电压电平周期的一部分以及该电压增加周期的一部分重叠。
6.根据权利要求1所述的设备，其中在前一个子场中的复位周期的最大电压电平比该建立信号的最大电压电平高。
7.根据权利要求1所述的设备，其中该建立信号的最大电压电平比该第一电压电平高50V至100V。
8.根据权利要求1所述的设备，其中，在相同子场的维持周期中，利用该第一电压电平产生的放电所发出的光量是利用一次维持放电发出的光量的一半并更少。
9.根据权利要求1所述的设备，其中该第一电压电平或该第二电压电平基本上与在该维持周期期间施加的维持脉冲的高电压电平一致。
10.根据权利要求1所述的设备，其中在该建立信号的提供结束之后，将从预定电压逐渐减少至负极性的电压电平的撤除信号施加到该扫描电极。
11.根据权利要求10所述的设备，其中，在该撤除信号的施加时刻前或基本上相同的时刻，将从地电平增加至正极性的电压电平的电压施加到该维持电极。
12.根据权利要求11所述的设备，其中该正极性的电压电平基本上与在该维持周期期间施加的维持脉冲的高电压电平一致。
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