CN1185609C - 等离子体显示器的驱动方法 - Google Patents

等离子体显示器的驱动方法 Download PDF

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CN1185609C
CN1185609C CNB011353651A CN01135365A CN1185609C CN 1185609 C CN1185609 C CN 1185609C CN B011353651 A CNB011353651 A CN B011353651A CN 01135365 A CN01135365 A CN 01135365A CN 1185609 C CN1185609 C CN 1185609C
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electrode
voltage
subframe
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addressing
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CN1355518A (zh
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濑户口典明
高森孝宏
岸智胜
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Maxell Ltd
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Fujitsu Hitachi Plasma Display Ltd
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Abstract

一种驱动等离子体显示器的方法，其中，即使寻址脉冲的电压低并且其宽度窄，用于寻址操作的放电也会成功发生。一个显示帧包括多个子帧，灰度显示是通过给合发光的子帧而获得的，每个子帧包括重置周期，寻址周期，和维持周期，可为每个子帧任意地设置在重置周期中施加于第一电极与第二电极之间的重置电压差和在寻址周期中施加于第一电极与第二电极之间的寻址电压差，并且显示帧包括多个子帧其中至少重置电压差或寻址电压差是不同的。

Description

等离子体显示器的驱动方法
技术领域
本发明涉及等离子体显示器的驱动方法。详细讲，本发明涉及每幅显示帧包括多幅子帧而且灰度显示通过发光子帧的组合来实现的等离子体显示器的驱动方法。
背景技术
等离子体显示(PD)设备由于自身产生光，因而具有良好的清晰度，体薄并能制成大屏幕的高速显示器，因此，作为CRT显示器的替代产品而受到关注。
图1示出了一部PD设备的基本结构。
如图1所示，在一个等离子体显示板(PDP)10中，X电极(第一电极：维持电极)X1、X2...，和Y电极(第二电极：扫描电极)交替相邻配置，而地址电极(第三电极)A1，A2...的配置方向与X和Y电极的方向垂直。一条显示线在一对X电极与Y电极之间，即在X1与Y1，X2与Y2，等等，之间形成，而一个显示单元(以下简称为单元)在一条显示线与一个地址电极交叉的点上形成。
各X电极共同与一个X维持电路14连接，并且向它们施加相同的驱动信号。各Y电极分别与一个Y扫描驱动器12连接并在寻址操作中向它们顺序地施加一个扫描脉冲，这一点后面还要描述，或者是另一种情况，由一个Y维持电路13施加相同的驱动信号。地址电极与一个地址驱动器11连接并且一个地址信号与寻址操作中的扫描脉冲同步来选择一个ON(开通)单元和一个OFF(关闭)单元，或者是另一种情况，向它们施加一个相同的驱动信号。一个控制电路15输出一个信号对上述的每个部件进行控制。
图2示出了一幅帧的结构以对PDP设备中的驱动顺序进行描述。由于等离子体显示器的放电只有两个状态，即ON状态和OFF状态，则显示的灰度由光发射的次数来表示。因此，如图2中所示，与一个显示对应的一幅帧被分成多个子段(subfield)。每个子段包括重置周期，寻址周期，和维持周期。在重置周期中，执行把所有的单元，无论该单元在前段中是处于ON状态还是处于OFF状态，都置成同一状态的操作，例如，置成壁电荷均被消除或电荷均匀形成的状态。在寻址周期中，执行所选择的放电(寻址放电)以便根据显示数据确定一个单元处于ON状态还是OFF状态，而且，导致在后面的维持周期中出现光发射的放电所需的壁电荷在一个处于ON状态的单元形成。在维持周期中，反复进行放电用于在寻址周期中进入ON状态的单元上的光发射。维持周期的长度即光发射的次数，在子段与子段之间是不同的，而显示的灰度可以通过把光发射的次数置成一个比率如1∶2∶4∶8...，并且根据该灰度把子段组合起来为每个单元发光来体现。
图3是一个波形图，示出了驱动一个等离子体显示板的传统方法的一个例子。如图所示，在重置周期中，一个高于放电起始电压的电压脉冲，比如说300V的Vw，被施加于X电极。施加该脉冲将导致在每个单元中出现放电，而不管该单元在以前子段中处于ON状态还是OFF状态，而且导致壁电荷的形成。取消该脉冲时，由于壁电荷本身的电压，将导致放电的再次出现，而且由于电极之间没有电位差，由放电生成的空间电荷将被中和并将获得没有壁电荷的均匀状态。在寻址周期中，一个扫描脉冲被顺序地施加于Y电极，而且一个寻址脉冲(寻址信号)被施加于该显示行的将发亮的单元的寻址电极，以便使放电出现。该放电传播到X电极一侧并在X电极与Y电极之间形成壁电荷。对整条显示行均执行该扫描。在寻址周期中，要求产生的放电出现在寻址脉冲所施加的单元中，而不是寻址脉冲没有施加的单元中，而且寻址脉冲的电压是依据各种误差因素均被考虑在内而确定的。这样，在维持周期中，一个电压Vs(约170V)的维持脉冲被反复地施加于X电极与Y电极。施加维持脉冲时，在寻址周期中形成壁电荷的单元发生放电，因为壁电荷的电压被迭加到维持脉的电压上并且总电压超过了放电起始电压。在寻址周期中未形成壁电荷的单元并不放电。虽然几乎所有的电荷均被中和，但是一定量的离子与亚稳态原子仍余留于放电空间中。有这样的情况，这些余留电荷被用作引发下一次寻址放电使之不致失败。通常，这被称为引导效应(pilot effect)或起动效应(priming effect)
图4示出了本申请人的(Kokai)公开号为NO.2000-75835的未经审查的日本专利中公开的常规驱动方法的又一个例子。该驱动方法能使弱重置放电发生并防止对比度受到通过所设定的具有电压渐变的斜波型的重置脉冲而实现的重置放电所破坏。而且，公开号(Kokai)No.2000-75835的未经审查的日本专利披露，重置周期结束时，通过调整所施加的在X电极与Y电极之间的电压积累适量的壁电荷是可能的，而且通过把将要施加于Y电极的具有斜波型的电压置为扫描脉冲未被施加时的电压与寻址周期中的扫描脉冲的电压之间的一个电压值而引起发生稳定的地址放电也是可能的。
对于等离子体显示设备的基本结构与功能已进行了如上的描述，但是各种修改的例子已被提出。例如，在一种修改中，在如图2中所示的帧结构中提出了具有相同的光发射次数的多个子段，以使活动显示平滑起来。在另一项修改中，伴随着写放电的重置操作只在一幅帧的第一个子段中进行而不在后续的子段的重置操作中进行。在另一项修改中，重置并非在所有的单元中进行，而仅在以前子段中处于ON状态的单元中进行。在另一项修改中，在重置操作中均匀的壁电荷被余留下来而清除地址的方法可用于选择处于OFF状态的单元以便在寻址操作中清除壁电荷。在另一项修改中，通过在X电极与Y电极之间施加一个电压从而去掉重置脉冲的方式，所需数量的电荷被留下来以供在寻址操作中使用。还有，本申请人已经在EP0762373A2公开了采用称为ALIS方法的一个驱动方法的等离子体显示设备，其中，通过在X电极与Y电极之间的，即在两侧在每个Y电极与每两个X电极之间的缝隙中形成显示行的方式，使显示行的数量增加一倍，而不用改变X电极与Y电极的数量。
正如到目前为止的说明，对于等离子体显示设备已有多种修改，而本发明可以适用于这些修改中的每一项修改。
需要一种超过CRT质量的高质量显示的等离子体显示设备。实现高质量显示的因素包括高清晰度，高灰度级，高亮度，高对比度，等等。为实现高清晰度，有必要通过缩小象素间隔来增大显示行及显示单元的数量，而上述的ALIS方法就具有一个能以低成本实现高清晰度的结构。为实现高对比度，有必要降低比如说重置脉冲的放电强度与次数，而这与显示器无关。
为实现高灰度级，有必要增加帧内的子段数量以增加可以表示的灰度级的数量，但是这还要求缩短重置操作以及寻址操作所需要的时间或者缩短维持放电的周期。为实现高亮度，增大维持放电的强度可以是一项措施，但是这样导致发光材料退化的问题。另一项措施是增加帧内维持放电的次数。为了增大维持放电的次数，就有必要如上所述地通过缩短重置操作和寻址操作所需的时间来缩短维持放电的周期或增大维持周期的比率。然而，在当前的结构中缩短维持操作周期有其自身的限制，因为必须保持维持放电的稳定发生。因此，从高灰度级与亮度的观点出发，需要缩短重置操作与寻址操作的时间。详细讲，寻址周期长于重置周期，因为扫描脉冲是顺序施加的，因此，如果扫描脉冲能够变窄，时间缩短所产生的效果就会变大。
在寻址操作中寻址电极与Y电极间的电压是寻址脉冲与扫描脉冲间的电压之差(或者是加上在重置周期中形成的壁电荷的有效电压后的电压)，而且，当该有效电压超过放电阈值电压时就会形成放电。如果该有效电压与放电阈值电压间的差大，则扫描脉冲的宽度可被缩窄，因为寻址放电前的时间延迟短，如果该差小，则扫描脉冲的宽度需要加宽，因为寻址放电前的时间延迟长。也就是说，寻址电极与Y电极之间的有效电压与扫描脉冲的宽度之间的关系是一种权衡关系。因此，利用窄扫描脉冲进行操作的一个方法就是增大寻址脉冲与扫描脉冲之间电压的差。
考虑到各种误差因素，有必要确定寻址脉冲的电压，以便在寻址脉冲所施加到的单元中而不是在寻址脉冲未施加到的单元中形成寻址放电。更具体地讲，把寻址脉冲的电压置为大于将被施加于每个单元的有效电压的变化，并且确定扫描脉冲的电压(和在重置周期中形成的壁电荷的有效电压)，以便在寻址脉冲的半电压被施加时能达到放电阈值电压。扫描脉冲主要取决于与寻址脉冲的电压压差，而且如果寻址脉冲的极性为正，则扫描脉冲的极性为负。如上所述，例如有必要增大扫描脉冲的电压，以便增大差值电压，但是在这种情况下，与Y电极的耐压紧密度有关的问题就出现了。
因此，可以建议在重置周期中把有效用于下一次寻址操作的壁电荷留存下来以便通过利用残余的壁电荷的电压来有效地增大寻址脉冲与扫描脉冲之间的电压差。
考虑到上述的观点，要确定寻址脉冲的电压，扫描脉冲的电压与宽度，以及在重置周期中被留下的壁电荷的量。以便根据显示数据成功地进行寻址放电。
在等离子体显示设备中，提供了如图2中所示的子帧结构以代表灰度级，并为每个单元选择根据显示级而进入ON状态的子帧。通常，在所有的子帧中，有关寻址脉冲的电压，扫描脉冲的电压及宽度，以及将在重置周期中被留存的壁电荷的量值的条件常常是相同的。
然而，如果在重置周期与寻址周期中为每个子帧提供相同的条件，则在子帧与子帧之间在寻址放电出现之前的时间延迟是不同的。寻址放电出现之前的时间延迟的产生是由于起动效应不够充分，而且使寻址放电的进行不大可能发生。如上所述，由放电生成的电荷被作为壁电荷积累或者被中和，但是一定量的离子与亚稳态的原子留存于放电空间中，可提供起动效应。放电空间中的电荷是依据放电的强度生成的并被逐渐中和进而消失的。因此，在高权重的子帧发光的情况下，由于多次的维持放电，相当幅度的起动效应就可能产生。但是当低权重的子帧发光时，因为维持放电的次数少，仅出现轻微的起动效应。还有，放电过后，起动效应随时间而衰减。因此，在暗显示时间长的情况下，因为在每帧中只有低权重的子帧发光，子帧的起动效应就小，并且由于直至下一帧为止没有子帧发光而衰减，而到下一帧的子帧的寻址周期到来时效应已变得非常小，并且进行寻址放电也更不大可能发生。
常规上，往往要确定寻址脉冲的电压，扫描脉冲的电压与宽度，在重置周期中被留存的壁电荷的量等项条件，以便在此情况下能成功地进行寻址操作。由于每帧的差别会增大寻址操作中有效电压的变化，于是，往往要相应增大寻址脉冲的电压，或者往往要加宽扫描脉冲的宽度，以扩大允许范围。然而，当寻址脉冲的电压增大时，就有必要采用高耐压的寻址驱动器，可是这将导致成本增高的问题。另一方面，当扫描脉冲的宽度加宽时，会出现寻址周期加长的问题。
如上所述，到目前为止，即符合寻址脉冲电压低的条件又符合扫描脉冲宽度窄的条件的方法尚未被采用。
发明内容
本发明的目的是实现即使在寻址脉冲的电压低而扫描脉冲的宽度又窄的情况下用于寻址操作的放电也能成功进行的一种驱动等离体显示器的方法。
本发明的驱动等离子体显示器的方法是，改变施加于第一电极(X电极)与第二电极(Y电极)之间的电压，形成一个压差，以便在重置周期中留存板中荷，并实现上述目的，使在重置周期中施加于第一电极与第二电极之间的重置电压的差与在寻址周期中施加于第一电极与第二电极之间的寻址电压的差，能被置为用于每个子帧的一个任意值，并且至少在一个子帧中，或者是重置电压的压差或者是寻址电压的压差中的至少一个压差是与其他子帧不同的。
在重置周期中施加于第一电极与第二电极之间的重置电压的差对在重置周期中被留存的壁电荷的量值有影响。寻址电压差与壁电荷引起的电压之和是在寻址操作中施加于第一电极与第二电极之间的有效电压。根据本发明，在寻址周期中施加于第一电极与第二电极之间的寻址电压的差，或者在重置周期中被留存的壁电荷的量值，或者二者(即有效电压)，能够被置为用于每个子帧的最佳值。因此，以前要做的对子帧中的寻址放电前的时间延迟进行考虑就不再是必要的了，而且在每个子帧中扫描脉冲的宽度可被变窄，结果，寻址周期所要求的时间减少。
使维持周期短的子帧的寻址操作的有效电压大于维持周期长的子帧的寻址操作的有效电压。在帧的重置周期中重置放电在该显示帧的整个表面上进行。当帧重置周期在该帧的起点开始时，使离帧重置周期远的子帧中的寻址操作的有效电压大于离帧重置周期近的子帧中的寻址操作的有效电压。
此外，也可以是这种情况，即为每个帧设置扫描脉冲的宽度以及寻址操作中的有效电压。
本发明的驱动方法是，通过改变在斜脉冲端部的在重置周期中施加于第一电极与第二电极之间的电压来留存所需量值的壁电荷。为在端部改变电压，采用一个电路来生成该斜脉冲并且输出电压随时间而改变，而且驱动该电路的时间是受控的。
具体地说，本发明提供一种驱动等离子体显示器的方法，该等离子体显示器包括相邻设置的第一电极与第二电极，以及与所述的第一和第二电极成交叉布置的第三电极，其中显示单元形成于所述第一和第二电极与所述第三电极交叉的点上，其中与一个显示相对应的一个显示帧包括多个子帧，而所显示的灰度是通过组合发光的子帧而获得的；每个子帧包括一个重置周期，在该重置周期内一个显示单元的壁电荷的分布被初始化，一个寻址周期，在该寻址周期内所述显示单元的壁电荷在重置周期后根据显示数据而进入一个状态，和一个维持周期，在该维持周期内根据在所述的寻址周期中设置的所述显示单元的状态有选择地使要发光的单元发射光，所述方法的特征在于，可为每一个子帧设置在所述的重置周期中施加于所述的第一电极与所述的第二电极之间的重置电压差，以及可为每一个子帧设置在所述的寻址周期中施加于所述第一电极与所述第二电极之间的寻址电压差，并且所述显示帧包括多个子帧，在所述多个子帧中，至少或者所述重置电压差或者所述寻址电压差是不同的。
根据本发明上述驱动等离子体显示器的方法，其中在所述维持周期较短的子帧中比在所述维持周期较长的子帧中，至少或者是所述的重置电压差或者是所述的寻址电压差较大。
根据本发明上述驱动等离子体显示器的方法，其中：每个显示帧包括一个帧重置周期，在该周期中无论前一帧结束时的状态如何，在所述的帧的开头提供一个发生在整个表面上的重置放电；并且在离所述的帧重置周期更远的子帧中比在离所述的帧重置周期更近的子帧中，至少或者是所述重置电压差或者是所述寻址电压差更大。
根据本发明上述驱动等离子体显示器的方法，其中：在所述的寻址周期中，当一个扫描脉冲被顺序施加于所述第二电极时，与显示数据对应的一个信号与所述的扫描脉冲同步地施加于所述的第三电极；可为每个子帧设置所述的扫描脉冲的宽度，并且可根据所述的扫描脉冲的宽度为每个子帧设置所述的重置电压差与所述的寻址电压差。
根据本发明上述驱动等离子体显示器的方法，其中，在所述的重置周期中施加于所述的第一电极与所述的第二电极之间的一个信号随着时间其电压改变，并且所述的信号是通过控制一个电路的驱动时间而实现的，其中该电路输出的电压随着时间而变化。
附图说明
参照附图，通过下面的说明，将会对本发明有更为清晰的了解，其中：
图1是一个方块图，示出了等离子体显示设备的基本结构；
图2示出了在等离子体显示设备中执行灰度显示的帧结构；
图3是一个波形图，示出了驱动等离子体显示设备的常规的方法；
图4是一个波形图，示出了驱动等离子体显示设备的另一个常规的方法；
图5示出了本发明的第一个实施例中的帧结构；
图6是一个波形图，示出了第一个实施例的驱动方法；
图7示出了在第一个实施例中重置周期结束之后每个电极上的壁电荷；
图8A示出了在第一个实施例中使用的斜脉冲生成电路的结构；
图8B对在第一个实施例中使用的斜脉冲生成电路的操作进行图解；
图9示出了本发明的第二个实施例中的帧结构；
图10是一个波形图，示出了第二个实施例中的驱动方法。
具体实施方式
图5示出了本发明的第一个实施例中的帧结构。如图所示，在一个帧中，按照顺序安排了6个子帧，即子帧1(SF1)、SF2，...，SF6，而且每个子帧中的维持周期，SF2中的长于SF1中的，SF3中的长于SF2中的，...，而SF6中的长于SF5中的。
图6示出了第一个实施侧中的每个子帧的驱动波形，而维指周期的长度(即维持脉冲的数量)对于不同的子帧而言是不同的，并且在同一时刻ΔVadd-ΔVh是随机设置的。
如图所示，每个SF的重置周期被分成两个周期，亦即，重置周期(写)与重置周期(电荷调适)。在重置周期(写)中，通过把电压逐渐下降的斜脉冲施加于X电极，并且把电降逐渐增大的斜脉冲施加于Y电极的方式来引起重置放电。由于重置放电，正电荷在X电极一侧累积而负电荷在Y电极一侧累积。然而，斜脉冲引起的放电小，而且具有由重置放电产生的不希望的光发射量可被降低的优点。然而，由斜脉冲产生的重置放电所引起的起动效应是很小的而且不能期望足够的起动效应。因此，在后续的寻址周期中对于寻址放电而言，由维持放电引起的起动效应是必不可少的。
在后续的重置周期(电荷调适)中，一个特定的电压(与维持脉冲的正侧的电压相等的电压)被施加于X电极，而电压逐渐下降的斜脉冲被施加于Y电极，以降低在前面的重置周期(写)中积累的壁电荷。这时，施加于X电极的电压大于施加于Y电极的电压，而且压差是ΔVh。正如在上面提到的公开(Kokai)号为No.2000-75835的未经审查的日本专利中透露的，在电压差ΔVh与残余的壁电荷的量值之间存在一个固定的关系，并且当电压差ΔVh降低时壁电荷的量值增大。还有，由于在重置周期(写)中积累的壁电荷在重置周期(电荷调适)中被减少，因而重置周期(写)中的重置放电的强度与重置周期(电荷调适)结束后残余的壁电荷的量值也有关系。重置放电的强度与重置周期(写)中的X电极的和Y电极的电压有关。如图7所示，在这两种情况下，在重置周期(写)的未端，负电荷积累在Y电极上，而正电荷积累在X电极与寻址电极上。当ΔVh小时，积累电荷的量值就大，或者是重置周期(写)中的X电极与Y电极之间的电压差应大。
在后续的寻址周期中，比上面提到的固定电压(与维持脉冲的正侧的电压相等的电压)高ΔVx的一个电压施加于X电极，并且，在维持脉冲的中间电压被施加之后，一个宽度为Ts的扫描脉冲紧接着被施加于Y电极。在施加一个扫描脉冲的时候，X电极与Y电极之间的电压差是ΔVadd。在重置周期(电荷调适)的末端扫描脉冲的电压比施加于Y电极的斜脉冲的电压低ΔVα。此外，与扫描脉冲的施加同步，一个寻址脉冲被施加于寻址电极。在寻址放电期间施加于X电极与Y电极之间的有效电压是由壁电荷引起的电压迭加的电压ΔVadd，如上所述，壁电荷的电压与ΔVh有关，因此，在寻址放电期间施加于X电极与Y电极之间的有效电压与ΔVadd-ΔVh有关。也就是说，ΔVadd-ΔVh越大，寻址放电越容易发生。因为后面的维持周期与常规的维持周期相同，这里就略而不叙了。
如上所述，由放电生成的一些电荷留存于放电空间中，提供起动效应。如上所述，在第一个实施例中，重置周期(写)中的重置放电引起的起动效应小，因此，维持放电引起的起动效应将是关注的主要问题。当一个大权重的子帧发光时，因为多次的维持放电，会生成一个可观的起动效应。因此，当一个大权重的子帧发光时，起动效应不仅留存于相邻的低权重子帧中，而且也会保留于后续帧的高权重子帧中。因此在这种情况下不会出现有关起动效应的任何问题。与此相反，当仅有一个低权重的子帧发光时，起动效应就弱，并且在后续帧的一个低权重子帧发光之前会变得非常微弱。因此，出现有关起动效应减弱的问题的是低权重的子帧。
在第一个实施例中，使一个低权重的子帧SF1或SF2中的ΔVadd-ΔVh大于一个高权重的子帧SF5或SF6中的ΔVadd-ΔVh，以便使寻址放电更频繁地出现。此外，还可以有一种情况，加大重置周期(写)中的X电极与Y电极之间的电压。这就能保证寻址放电成功地出现，即使是在只有低权重的子帧发光并且起动效应微弱的时候。
在图6中，在重置周期(电荷调适)中施加于X电极的电压与在寻址周期中施加于X电极的电压之间的电压差ΔVx，和在重置周期(电荷调适)的末端施加于Y电极的电压(斜脉冲的末端的电压)与在寻址周期中施加于Y电极的扫描脉冲的电压之间的电压差ΔVα的和，等于ΔVadd-ΔVh，换言之，ΔVadd-ΔVh＝ΔVx+ΔVα。增大ΔVadd-ΔVh时，同样的效果也能通过增大ΔVx或者ΔVα来获得。还有，在寻址操作中留在寻址电极上的壁电荷的量值可以通过ΔVx和ΔVα的分布比率来调整。
在第一个实施例中，有必要在重置周期(写)和重置周期(电荷调适)中把斜脉冲施加于电极，也有必要根据子帧而改变施加的斜脉冲的末端的电压。图8A示出了生成这种斜脉冲的斜脉冲生成电路的结构，而且图8对该电路的作用进行了图解。如图8A所示，第一个FET的漏极与第一个电源的终端连接，栅极与控制器连接，而源极通过一个电阻和一个二极管与输出端连接。Y电极，即输出端，通过一个二极管，一个电阻，和第二个FET与第二个电源的终端连接。第一个电源提供一个比正的斜波形的目标电压稍高的电压，第二个电源提供一个比负的斜波形的目标电压稍低的电压。当施加一个正的斜脉冲时，在使第二个FET截止的信号从控制器输出的同时，施加使第一个FET导通的脉冲。在该控制器中，该脉冲的宽度能够随意设置，当FET导通时，输出是逐渐增大的，因为电阻和平板电容形成一个延迟电路。当输出达到所要求的电压值时，如果被施加于第一个FET的栅极的脉冲输出被控制器终止，则该输出维持在所要求的电压值。例如，如图8B中所示，如果输出被终止于电压V1，则控制器给出宽度为t1的脉冲，而如果终止于电压V2，则控制器给出宽度为t2的脉冲。这样，正的斜脉冲的末端的电压值就可以随意设置。当施加一个负的斜脉冲时，第二个FET以与上面提到的相同的方式被激活。这样，产生了组合了在图6中的被施加于Y电极的两个斜脉冲的一个信号。
图9示出了本发明的第二个实施例中的帧结构。在第二个实施例的帧结构中，最高权重的子帧设置于帧的中心部位，而较小权重的子帧被按照顺序向两边设置，同时，在帧的顶部给出帧的重置周期。在该帧重置周期中，无论前面的子帧结束时的状态如何，都将在整个表面(全部的单元)上引起发生一次重置放电，并且可以使用的全表面写脉冲或者斜脉冲。起动则由该重置放电形成。
图10示出了第二个实施例中的每个子帧的驱动波形，而这些驱动波形与图6中的第一个实施例中的驱动波形不同之处在于，在重置周期(写)中施加一个变化陡峭的脉冲。即使施加的是这样的一个脉冲，也会引起一个重置放电。后续的操作与第一个实施例中的操作相同，但是在第二个实施例中，使远离帧重置周期的子帧SF4或者SF2中的ΔVadd-ΔVh，或者是在重置周期(写)中的X电极与Y电极间的电压，大于其他子帧SF1或SF6中的ΔVadd-ΔVh，以便寻址放电更容易发生。由此，甚至当在远离帧重置周期的子帧中起动效应弱的时候，也能保证寻址放电成功地发生。
如上所述，根据本发明，因为寻址周期的有效电压可根据子帧被置为最佳状态，操作容限变大了，并且寻址周期可通过缩窄扫描脉冲的宽度而被缩短。这将进一步改善等离子体显示设备的灰度与亮度的质量。

Claims (5)

1.一种驱动等离子体显示器的方法，该等离子体显示器包括交替地相邻设置的第一电极与第二电极，以及与所述的第一和第二电极成交叉布置的第三电极，其中显示单元形成于所述第一和第二电极与所述第三电极交叉的点上，其中与一个显示相对应的一个显示帧包括多个子帧，而所显示的灰度是通过组合发光的子帧而获得的；每个子帧包括一个重置周期，在该重置周期内一个显示单元的壁电荷的分布被初始化，一个寻址周期，在该寻址周期内所述显示单元的壁电荷在重置周期后根据显示数据而进入一个状态，和一个维持周期，在该维持周期内根据在所述的寻址周期中设置的所述显示单元的状态有选择地使要发光的单元发射光，所述方法的特征在于，可为每一个子帧设置在所述的重置周期中施加于所述的第一电极与所述的第二电极之间的重置电压差，以及可为每一个子帧设置在所述的寻址周期中施加于所述第一电极与所述第二电极之间的寻址电压差，并且所述显示帧包括多个子帧，在所述多个子帧中，至少或者所述重置电压差或者所述寻址电压差是不同的。
2.根据权利要求1的驱动等离子体显示器的方法，其中在所述维持周期较短的子帧中比在所述维持周期较长的子帧中，至少或者是所述的重置电压差或者是所述的寻址电压差较大。
3.根据权利要求1的驱动等离子体显示器的方法，其中：每个显示帧包括一个提供在所述帧顶部的帧重置周期，在该周期中无论前一帧结束时的状态如何，在整个表面上都产生重置放电；并且在离所述的帧重置周期更远的子帧中比在离所述的帧重置周期更近的子帧中，至少或者是所述重置电压差或者是所述寻址电压差更大。
4.根据权利要求1的驱动等离子体显示器的方法，其中：在所述的寻址周期中，当一个扫描脉冲被顺序施加于所述第二电极时，与显示数据对应的一个信号与所述的扫描脉冲同步地施加于所述的第三电极；可为每个子帧设置所述的扫描脉冲的宽度，并且可根据所述的扫描脉冲的宽度为每个子帧设置所述的重置电压差与所述的寻址电压差。
5.根据权利要求1的驱动等离子体显示器的方法，其中，在所述的重置周期中施加于所述的第一电极与所述的第二电极之间的一个信号随着时间其电压改变，并且所述的信号是通过控制一个电路的驱动时间而实现的，其中该电路输出的电压随着时间而变化。
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US6483251B2 (en) 2002-11-19
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EP1195739A3 (en) 2007-05-02
KR20020027173A (ko) 2002-04-13
CN1355518A (zh) 2002-06-26
KR100852568B1 (ko) 2008-08-18
JP4357107B2 (ja) 2009-11-04
JP2002116730A (ja) 2002-04-19
US20020041161A1 (en) 2002-04-11
KR100852569B1 (ko) 2008-08-18
TW511054B (en) 2002-11-21

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