CN100373433C - 驱动等离子显示面板的方法 - Google Patents
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Abstract
本发明涉及等离子显示面板,特别涉及驱动等离子显示面板的方法。根据本发明的实施例,该驱动等离子显示面板的方法包括步骤:在维持周期中交替施加第一维持脉冲到扫描电极线和维持电极线;在维持周期中施加作为最后的维持脉冲的、具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲;并且在施加第二维持脉冲之前,将壁电荷增强脉冲加到扫描电极线和维持电极线之一。因此,根据本发明,由最后的维持脉冲产生强的维持放电。因此,可以形成下一个擦除寻址周期需要的足够壁电荷,并且从而防止错误放电。
Description
这个非临时申请要求于2003年11月8日在韩国提交的专利申请No.10-2003-0078850在35 U.S.C.119(a)下的优先权,并且将其整个内容完全包括在这里并作为参考。
技术领域
本发明涉及等离子显示面板,并且更为具体地涉及一种用于驱动等离子显示面板的方法。
背景技术
等离子显示面板(在下文中,作为“PDP”提到)适于通过以在比如He+Xe,Ne+Xe或He+Ne+Xe的气体放电期间产生的147nm紫外线辐射荧光材料来显示包括字符或图形的图像。随着近来的技术进步,这种PDP可以被制造得薄而且大,并且可以提供大大改进的图像质量。具体地说,三电极AC表面放电类型PDP具有低的驱动电压和产品寿命较长的优点,这是因为通过在放电情况下在表面累积的壁电荷降低了放电所需的电压,并且保护电极不受放电产生的飞溅影响。
图1是示出了在现有技术中的三电极AC表面放电类型PDP的放电单元的结构的透视图。
参考图1,三电极AC表面放电类型PDP的放电单元包括在上基片10的下表面上形成的扫描电极30Y和维持电极30Z,以及在下基片18上形成的寻址电极20X。
扫描电极30Y包括透明电极12Y,以及具有小于透明电极12Y的行宽度的行宽度、并且放置在透明电极的一个边缘侧的金属总线电极13Y。维持电极30Z包括透明电极12Z、以及具有小于透明电极12Z的行宽度的行宽度、并且放置在透明电极的一个侧边缘的金属总线电极13Z。透明电极12Y、12Z通常由ITO(铟锡氧化物)制成,并且在上基片10的下表面上形成。金属总线电极13Y、13Z通常由铬(Cr)制成,并且在透明电极12Y、12Z上形成,并用于减少由具有高阻抗的透明电极12Y、12Z引起的电压降。在其中彼此平行设置扫描电极30Y和维持电极30Z的上基片10的下表面上,层压上介质层14和保护层16。在上介质层14上累积在等离子放电期间产生的壁电荷。保护层16用于保护上介质层14不受在等离子放电期间产生的飞溅影响,并且改进次级电子辐射的效率。通常将氧化镁(MgO)用作保护层16。
在其和扫描电极30Y和维持电极30Z交叉的方向上形成寻址电极20X。在其中形成下介质层22的下基片18上形成下介质层22和阻挡条24。与寻址电极20X平行地形成阻挡条24,以物理地划分放电单元,从而防止由放电产生的紫外线和可见光泄漏进相邻的放电单元。以在等离子放电期间产生的紫外线激励荧光材料层26以产生红色、绿色和蓝色可见光中的任意一个。将比如He+Xe、Ne+Xe或He+Ne+Xe的惰性混合气体注入在上基片10和阻挡条24之间以及下基片18和阻挡条24之间定义的放电单元的放电空间。
以被划分为多个子场的一帧驱动这个三电极AC表面放电类型PDP,其中每个子场具有不同数量的发射以实现图像的灰度级。将每个子场划分为用于均匀产生放电的复位周期、用于选择放电单元的寻址周期,以及用于根据放电数量实现灰度级的维持周期。如果希望显示具有256个灰度级的图像,将对应于1/60秒的帧周期(16.67ms)划分为八个子场SF1到SF8,如图2所示。将每个子场SF1到SF8被细分为复位周期、寻址周期和维持周期。对于每个其他的子场,每一子场SF1到SF8的复位和寻址周期相同,然而每一子场中维持周期和它的放电数量的频率以2n(n=0,1,2,3,4,5,6,7)的比率增加。当每一子场中的维持周期这样变得不同时,可以实现图像的灰度级。
根据由寻址放电所选的放电单元是否发射光线,驱动PDP的方法主要被分类为选择性写入模式和选择性擦除模式。
其中,在选择性擦除模式中,在通过执行写入放电打开整个单元之后,关闭在寻址周期中选择的放电单元。之后,在维持周期中,仅使没有由寻址放电选择的放电单元经历维持放电,由此显示图像。
实际上,在选择性擦除模式中,每帧整个屏幕经历整个写入一次,并且每个子场SF1到SF10循序关闭不需要的放电单元,如图3所示。换句话说,第一子场SF1包括复位周期、整个写入周期、擦除寻址周期和维持周期。剩余的子场SF2到SF10仅包括擦除寻址周期和维持周期。同样的,如果在一帧内产生整个写入放电一次,最小化在一帧中产生的不需要的光线(也就是,由整个写入放电产生的光线),由此改进对比度。
在这时,在选择性擦除模式中,在子场SF1到SF9的维持周期期间应用如图4所示的维持脉冲,使得在不包括整个写入周期的剩余子场SF2到SF10中产生稳定的擦除寻址放电。
参考图4,将开始维持脉冲WISUS加到扫描电极线Y(或维持电极线Z)。在这时,因为开始维持脉冲WISUS具有比正常维持脉冲NSUS更宽的脉冲宽度,在打开单元中的壁电荷的量的增加比当在维持周期的初始阶段应用正常维持脉冲NSUS时要多。因此稳定了维持放电。在应用开始维持脉冲WISUS之后,将正常维持脉冲NSUS交替加到维持电极线Z和扫描电极线Y。
在这时,因为将最后的正常维持脉冲NSUS加到维持电极线Z,在放电单元中形成壁电荷,如图5a所示。换句话说,在扫描电极线Y中形成负(-)极性的壁电荷并且在维持电极线Z上形成正(+)极性的壁电荷。
之后,将其脉冲宽度被设置为比正常维持脉冲NSUS的更宽的最后的维持脉冲WFSUS加到扫描电极线Y。在这时,因为将最后的维持脉冲WFSUS的脉冲宽度设置得很宽,产生强的维持放电,如图5b所示,每当产生正常维持放电时在放电单元中形成更多的壁电荷。换句话说,在扫描电极线Y中形成比当产生正常维持放电更多的负(-)极性的壁电荷。在维持电极线Z中形成比当产生正常维持放电更多的正(+)极性的壁电荷。在下一个寻址周期的擦除放电中采用由最后的维持脉冲WFSUS产生的壁电荷。
但是,在现有技术中,由最后的维持脉冲WFSUS没有形成下一个寻址周期的擦除放电需要的足够壁电荷。这将在下面详细描述。
在应用最后的维持脉冲WFSUS之前,由正常维持脉冲NSUS在放电单元中形成小量壁电荷,如图5a所示。因为以在放电单元中形成的小量壁电荷应用最后的维持脉冲WFSUS,限制了可以由最后的维持脉冲WFSUS形成的壁电荷的量。因此,没有形成下一个寻址放电的擦除放电需要的足够壁电荷。同样的,在现有的选择性擦除模式中,在擦除寻址周期期间没有形成所需的壁电荷。因此,存在在维持周期中产生错误放电的问题。更为具体的说,当以范围从-50℃到0℃的低温驱动面板时错误放电变得更为严重。就是说,随着在低温环境中微粒的移动变得迟钝,没有由最后的维持脉冲WFSUS形成所需壁电荷,并且因此错误放电问题变得更为严重。
同时,在选择性写入模式中,在复位周期期间关闭整个单元,并且在寻址周期期间选择要被打开的打开单元。另外,在这个模式中,在维持周期期间,维持由选择放电选择的打开单元的放电,由此显示图像。
通常,选择性写入模式具有的优点在于可以表示的灰度级的范围比选择性擦除模式的更宽,但是具有的缺点在于寻址周期比选择性擦除模式的要长。相反的,如图3所示的选择性擦除周期的优点在于可以进行高速驱动,但是缺点在于可以表示的灰度级受限。
所谓的“SWSE(选择性写入和选择性擦除)模式”具有比选择性写入模式和选择性擦除模式更好的优点,并且已经在现有技术中公开的。
但是,即使这个SWSE模式具有如果以选择性擦除模式,具体地说,以低温驱动面板,则在擦除周期期间不能选择所需放电单元的问题。
发明内容
因此,本发明的目的是至少解决现有技术的问题和缺点。
本发明的目的是提供驱动PDP的方法,其中可以防止错误放电。
为实现上述目的,根据本发明的第一实施例,提供了在选择性擦除模式中驱动PDP的方法,包括步骤:在维持周期中交替应用第一维持脉冲到扫描电极线和维持电极线,在维持周期中应用作为最后的维持脉冲的具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲到扫描电极线,并且在应用第二维持脉冲之前,将壁电荷增强脉冲施加到扫描电极线。
根据本发明的第二实施例,提供了驱动等离子显示面板的方法,其中,一帧包括多个选择性写入子场和多个选择性擦除子场,该方法包括步骤:在所有的多个选择性写入子场和一个或多个选择性擦除子场的维持周期期间交替应用第一维持脉冲到扫描电极线和维持电极线;在维持周期中应用作为最后的维持脉冲的具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲到扫描电极线,并且在应用第二维持脉冲之前,将壁电荷增强脉冲加到扫描电极线。
如上所述,根据本发明,由最后的维持脉冲产生强的维持放电。因此,可以形成下一个擦除寻址周期需要的足够壁电荷,并且因此防止错误放电。
附图说明
将参考附图详细描述本发明,其中相似的数字表示相似的元件。
图1是示出了现有技术的三电极AC表面放电类型等离子显示面板的放电单元的结构的透视图。
图2示出了在现有技术的PDP的亮度加权的实例。
图3示出了现有技术中选择性擦除模式的一帧。
图4示出了加到如图3所示的维持周期的驱动脉冲。
图5a和5b示出了在维持周期中形成的壁电荷。
图6示出了在选择性擦除子场的周期中提供的驱动波形,用于解释根据本发明的第一实施例的驱动PDP的方法。
图7a到7c示出了在如图6所示的维持周期中形成的壁电荷。
图8示出了其中当驱动本发明的PDP时,在一帧内布置选择性擦除子场和选择性写入子场的状态。
图9示出了在选择性擦除子场和选择性写入子场的周期中提供的驱动波形,用于解释根据本发明的第一实施例的驱动PDP的方法。
具体实施方式
下面将参考附图以更加详细的方式描述本发明的优选实施例。
<第一实施例>
根据本发明的第一实施例,提供了一种在选择性擦除模式中驱动PDP的方法,包括步骤:在维持周期中交替应用第一维持脉冲到扫描电极线和维持电极线,在维持周期中应用作为最后的维持脉冲的具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲,并且在应用第二维持脉冲之前,将壁电荷增强脉冲加到扫描电极线和维持电极线之一。
该方法进一步包括步骤:当应用壁电荷增强脉冲时,将同步脉冲加到没有应用壁电荷增强脉冲的其它的扫描电极线和维持电极线,使得同步脉冲和壁电荷增强脉冲同步。
该同步脉冲是方波。
该同步脉冲被设置以具有和第一维持脉冲相同的电压值。
壁电荷增强脉冲具有负极性的电压。
壁电荷增强脉冲是倾斜下降的斜面波形。
壁电荷增强脉冲下降到从-80V到-60V的电压范围。
壁电荷增强脉冲下降到从-72V到-68V的电压范围。
壁电荷增强脉冲的应用时间被设置到在2μs和3μs之间的范围中。
壁电荷增强脉冲被施加在一帧中包括的所有子场的维持周期中。
该壁电荷增强脉冲被施加在一帧中包括的多个子场中除了最后一个的剩余子场的维持周期中。
壁电荷增强脉冲仅在低温环境驱动面板时被施加。
图6示出了在选择性擦除子场的周期中提供的驱动波形,用于解释根据本发明的第一实施例的驱动PDP的方法。
参考图6,选择性擦除模式的第一子场包括复位周期、整个写入周期、擦除寻址周期和维持周期,而选择性擦除模式的剩余子场仅包括擦除寻址周期和维持周期。
就是说,在一帧的第一子场中,在整个放电单元中产生整个写入放电。而且在剩余子场中循序关闭不需要的放电单元,显示对应于数据的图像。
在第一子场的复位周期和整个写入周期,应用多种形状的脉冲。为了解释的方便,将使用都是共同使用的斜面波形RP和整个写入波形WP描述复位周期和整个写入周期的工作。
在第一子场的复位周期期间,将斜面波形RP加到扫描电极线Y。如果将斜面波形RP加到扫描电极线Y,在所有放电单元中产生斜面放电并且由斜面放电形成预定壁电荷。在这时,在扫描电极线Y形成负(-)极性的壁电荷,并且在维持电极线Z形成正(+)极性的壁电荷。
在第一子场的整个写入周期期间,将整个写入波形WP加到维持电极线Z和扫描电极线Y。在这时,首先将整个写入波形WP加到维持电极线Z使得它和在复位周期中形成的壁电荷的电压值重叠。同样的,如果将整个写入波形WP加到维持电极线Z和扫描电极线Y,在放电单元中形成维持放电需要的足够壁电荷。
之后,在擦除寻址周期中,将擦除数据脉冲SED加到寻址电极线X,并且也将擦除扫描脉冲SESCN加到扫描电极线Y。因此,在同时应用了擦除数据脉冲SED和擦除扫描脉冲SESCN的放电单元中产生了擦除寻址放电,由此擦除在整个写入周期期间形成的壁电荷。
在维持周期的开始点,将开始维持脉冲WISUS加到维持电极线Z。在这时,开始维持脉冲WISUS具有比正常维持脉冲NSUS更宽的脉冲宽度,由此产生强烈的维持放电。因此,在其中没有产生擦除寻址放电的打开单元,也就是放电单元中的壁电荷的量进一步增加,因此稳定了维持放电。
在施加开始维持脉冲WISUS之后,将正常维持脉冲NSUS交替加到维持电极线Z和扫描电极线Y。这个正常维持脉冲NSUS在打开单元中产生维持放电。在这时,因为最后的正常维持脉冲NSUS被加到扫描电极线Y,在放电单元中形成壁电荷,如图7a所示。换句话说,在扫描电极线Y中形成负(-)极性的壁电荷,并且在维持电极线Z形成正(+)极性的壁电荷。
之后,将第一壁电荷增强脉冲SR1加到扫描电极线Y。还将第二壁电荷增强脉冲SR2加到维持电极线Z,使得它和第一壁电荷增强脉冲SR1同步。在这时,第一壁电荷增强脉冲SF1被作为斜面波形施加,并且第二壁电荷增强脉冲SR2被作为方波施加。另外,可以不施加第二壁电荷增强脉冲SR2。
如果施加第一壁电荷增强脉冲SR1和第二壁电荷增强脉冲SR2,累加在打开单元中形成的壁电荷和电压值以产生增强的放电。在这时,因为同时应用第一壁电荷增强脉冲SR1和第二壁电荷增强脉冲SR2,在扫描电极线Y和维持电极线Z之间产生高的电压差值,使得发生强烈的增强放电。另外,因为作为斜面脉冲施加第一壁电荷增强脉冲SR1,由增强的放电在打开单元中形成如图7b所示的大量壁电荷。在本发明中,将第一壁电荷增强脉冲SR1的电压设置在-80V和-60V之间,优选的在-72V和-68V之间,使得在打开单元中形成足够的大量壁电荷。而且,将第二壁电荷增强脉冲SR2的电压值设置为与维持脉冲NSUS的相同。另外,在本发明中,将第一和第二壁电荷增强脉冲SR1、SR2的应用时间设置在2μs和3μs之间的范围中。通过实验发现如果第一和第二壁电荷增强脉冲SR1、SR2被设置得高于3μs,形成过多的壁电荷由此产生自擦除放电,并且如果将应用时间设置得小于2μs,不能形成足够的壁电荷。
之后,将具有宽的脉冲宽度的最后的维持脉冲WFSUS施加到扫描电极线Y。如果施加具有这个宽度的脉冲宽度的最后的维持脉冲WFSUS,则产生强的维持放电,并且因此形成很多壁电荷。更为具体的说,最后的维持脉冲WFSUS和由第一和第二壁电荷增强脉冲SR1、SR2形成的大量壁电荷的电压重叠。结果,可以形成如图7c所示的下一个子场的擦除寻址周期需要的足够壁电荷。
之后,在除了第一子场的剩余子场的周期期间,显示对应于数据的图像,而且重复擦除寻址周期和维持周期。在这时,可以将第一壁电荷增强脉冲SR1和第二壁电荷增强脉冲SR2加到整个子场的维持周期。换句话说,可以形成足够的壁电荷使得将第一和第二壁电荷增强脉冲SR1、SR2加到所有子场的维持周期,并且因此在下一个子场的擦除寻址周期中产生稳定的擦除放电。而且,可以将第一和第二壁电荷增强脉冲SR1、SR2加到除了最后一个子场的剩余子场的维持周期。实际上,因为下一帧的第一子场位于最后的子场之后,不能施加第一和第二壁电荷增强脉冲SR1、SR2。
同时,可以仅当在低温,也就是,范围从-50℃到0℃的温度驱动面板时施加第一和第二壁电荷增强脉冲SR1、SR2。换句话说,当在高于低温的温度下驱动面板时,可以不施加第一和第二壁电荷增强脉冲SR1、SR2,但是仅当在低温驱动面板时,施加第一和第二壁电荷增强脉冲SR1、SR2。同样的,如果在低温应用第一和第二壁电荷增强脉冲SR1、SR2,可以在低温以稳定的方式驱动面板。
<第二实施例>
根据本发明的第二实施例,提供了驱动等离子显示面板的方法,其中,一帧包括多个选择性写入子场和多个选择性擦除子场,该方法包括步骤:在一个或多个选择性写入子场和一个或多个选择性擦除子场的维持周期期间,交替施加第一维持脉冲到扫描电极线和维持电极线;在维持周期中施加作为最后的维持脉冲的具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲,并且在应用第二维持脉冲之前,将壁电荷增强脉冲加到扫描电极线和维持电极线之一。
该方法进一步包括步骤:当施加壁电荷增强脉冲时,将同步脉冲施加到没有应用壁电荷增强脉冲的其它的扫描电极线和维持电极线,使得同步脉冲和壁电荷增强脉冲同步。
该同步脉冲是方波。
同步脉冲被设置以具有和第一维持脉冲相同的电压值。
壁电荷增强脉冲具有负极性的电压。
壁电荷增强脉冲是以倾斜下降的斜面波形。
壁电荷增强脉冲下降到从-80V到-60V的电压范围。
壁电荷增强脉冲下降到从-72V到-68V的电压范围。
壁电荷增强脉冲的应用时间被设置到在2μs和3μs之间的范围中。
壁电荷增强脉冲被在选择性擦除子场的维持周期和位于选择性擦除子场之前的最后的选择性写入子场的维持周期中施加。
壁电荷增强脉冲被在除了最后选择性擦除子场的剩余选择性擦除子场的维持周期和位于选择性擦除子场之前的最后的选择性写入子场的维持周期中施加。
壁电荷增强脉冲仅在以低温环境驱动面板时被应用。
图8示出了其中当驱动本发明的PDP时选择性擦除子场和选择性写入子场位于一帧之内的状态。
参考图8,SWSE模式的一帧包括具有一个或多个子场的选择性写入子场WSF,和具有一个或多个子场的选择性擦除子场ESF。
选择性写入子场WSF包括m个(其中,m是大于0的正整数)子场SF1到SFm。驱动除了第m个子场SFm的每一第一到第m-1子场SF1到SFm-1,且将其划分为用于在整个屏幕的单元中均匀形成给定量的壁电荷的复位周期,用于使用写入放电选择打开单元的写入寻址周期,用于在所选的打开单元中产生维持放电的维持周期,以及用于在维持放电之后擦除在单元中的壁电荷的擦除周期。
第m个子场SFm是选择性写入子场WSF的最后一个子场,并且将其划分为复位周期、写入寻址周期和维持周期。将选择性写入子场WSF的复位周期、写入寻址周期和擦除周期设置以具有每个子场SF1到SFm相同的亮度加权,但是设置它的维持周期以具有相同或不同的亮度加权。
选择性擦除子场ESF包括n-m个(其中,n是大于m的正整数)子场SFm+1到SFn。第m+1到第n个子场SFm+1到SFn中的每一个被划分为用于使用擦除放电选择关闭单元的擦除寻址周期,以及用于在打开单元中产生维持放电的维持周期。在选择性擦除子场ESF的子场SFm+1到SFn中,将擦除寻址周期设置为相同,并且根据相对亮度比率设置维持周期相同或不同。
图9示出了在选择性擦除子场和选择性写入子场的周期中提供的驱动波形,用于解释根据本发明的第二实施例的驱动PDP的方法。
参考图9,在选择性写入子场WSF的复位周期中,将上升沿脉冲RPSU和下降沿脉冲RPSD加到整个扫描电极线Y。如果将上升沿脉冲RPSU加到扫描电极线Y,产生建立放电由此在放电单元中均匀的形成壁电荷。另外,如果将下降沿脉冲RPSD加到扫描电极线Y,产生撤除放电由此擦除形成的一些多余的壁电荷。同时,当将下降沿脉冲RPSD加到扫描电极线Y时,将正极性的DC电压(Va)加到维持电极线Z。
在写入寻址周期中,当将负极性的写入扫描脉冲SWSCN加到扫描电极线Y时,同时将写入数据脉冲SWD加到寻址电极线X,使得它与写入扫描脉冲SWSCN同步。之后,当写入扫描脉冲SWSCN和写入数据脉冲SWD的电压和先前累积的在单元中的壁电压被累加时,在施加了写入数据脉冲SWD的单元中产生写入放电,且因此选择打开单元。另外,利用写入放电,在扫描电极线Y上累计正极性的壁电荷,并且在维持电极线Z和寻址电极线X上累积负极性的壁电荷。这样形成的壁电荷用于降低外部施加的、用于在维持周期期间产生维持放电的电压,也就是,维持电压。
在维持周期的初始阶段,将开始维持脉冲WISUS1加到扫描电极线Y。开始维持脉冲WISUS1具有比正常维持脉冲NSUS更宽的脉冲宽度。因此,相比当首先将正常维持脉冲NSUS加到维持周期时,增加了在打开单元中的壁电荷的量。在施加开始维持脉冲WISUS1之后,将正常维持脉冲NSUS交替加到维持电极线Z和扫描电极线Y。另外,因为在除了第m个子场SFm的第一到第m-1子场SF1到SFm-1中提供擦除脉冲ERS,则关闭打开单元,其中第m子场SFm是在选择性擦除子场ESF之前的子场。
同时,其是选择性写入子场WSF的最后子场的第m个子场SFm的最后的维持脉冲WFSUS形成接下来的选择性擦除子场的周期需要的壁电荷,将最后的维持脉冲WFSUS的脉冲宽度设置为比正常维持脉冲NSUS的脉冲宽度更宽。在这时,在应用最后的维持脉冲WFSUS之前,将第一壁电荷增强脉冲SR1加到扫描电极线Y,并且将第二壁电荷增强脉冲SR2加到维持电极线Z使得其和第一壁电荷增强脉冲SR1同步。在这时,将第一壁电荷增强脉冲SR1应用为斜面脉冲,并且将第二壁电荷增强脉冲SR2施加为方波。
如果施加第一壁电荷增强脉冲SR1和第二壁电荷增强脉冲SR2,在打开单元中形成的壁电荷和电压值被累加以产生增强的放电。在这时,因为同时施加第一壁电荷增强脉冲SR1和第二壁电荷增强脉冲SR2,在扫描电极线Y和维持电极线Z之间产生高的电压差值,使得发生强的增强放电。另外,因为作为斜面波形施加第一壁电荷增强脉冲SR1,由增强的放电在打开单元中形成如图7b所示的大量壁电荷。在本发明中,将第一壁电荷增强脉冲SR1的电压设置在-80V和-60V之间,优选的在-72V和-68V之间,使得在打开单元中形成足够的大量壁电荷。而且,将第二壁电荷增强脉冲SR2的电压值设置为与维持脉冲NSUS的相同。另外,在本发明中,第一和第二壁电荷增强脉冲SR1、SR2的施加时间被设置在2μs和3μs之间的范围中。
如果在应用最后的维持脉冲WFSUS之前施加第一和第二壁电荷增强脉冲SR1、SR2,由最后的维持脉冲WFSUS产生强烈的维持放电。因此,可以形成下一个子场的擦除寻址周期需要的足够的壁电荷,如图7c所示。
之后,在接下来的选择性擦除子场ESF的寻址周期中,将擦除扫描脉冲SESCN循序加到扫描电极线Y,并且将与擦除扫描脉冲SESCN同步的擦除数据脉冲SED加到寻址电极线X。之后,因为在先前打开单元中形成的足够的壁电荷的电压值和擦除扫描脉冲SESCN及擦除数据脉冲SED的电压值被累加,在施加了擦除数据脉冲SED的打开单元中产生擦除放电。因此,由擦除放电将打开单元中的壁电荷擦除到虽然施加维持电压但不产生放电的程度。
在接下来的维持周期中,将具有宽的脉冲宽度的开始维持脉冲WISUS2加到维持电极线Z,使得可以稳定产生维持放电。之后将正常维持脉冲NSUS交替加到扫描电极线Y和维持电极线Z,由此在打开单元中产生维持放电。之后,将最后的维持脉冲WFSUS加到扫描电极线Y,因此形成接下来的擦除寻址周期需要的壁电荷。在这时,在应用最后的维持脉冲WFSUS之前,将第一和第二壁电荷增强脉冲SR1、SR2分别加到扫描电极线Y和维持电极线Z,使得在打开单元中形成多个壁电荷。因此,可以通过最后的维持脉冲WFSUS形成下一个擦除寻址周期需要的足够壁电荷。
同时,根据本发明,在最后的选择性写入子场SFm的维持周期中和所有选择性擦除子场ESF的维持周期中施加第一和第二壁电荷增强脉冲SR1、SR2。在这时,在最后的选择性擦除子场SFn的维持周期中,可以不施加第一和第二壁电荷增强脉冲SR1、SR2。换句话说,在最后的选择性擦除子场SFn的维持周期之后,定位下一帧的第一子场SF1。因此,不需要通过施加第一和第二壁电荷增强脉冲SR1、SR2增强壁电荷。实际上,可以由设计者决定在最后的选择性擦除子场SFn中是否应用第一和第二壁电荷增强脉冲SR1、SR2。
另外,根据本发明,可以仅当以范围从-50℃到0℃的低温驱动面板时应用第一和第二壁电荷增强脉冲SR1、SR2。换句话说,当以高于低温的温度驱动面板时,可以不应用第一和第二壁电荷增强脉冲SR1、SR2。仅当在低温驱动面板时,施加第一和第二壁电荷增强脉冲SR1、SR2。同样的,如果在低温环境中施加第一和第二壁电荷增强脉冲SR1、SR2,则可以在低温下稳定地驱动面板。
如上所述,根据本发明,通过最后的维持脉冲可以产生强的维持放电。因此,可以形成下一个擦除寻址周期需要的足够壁电荷,并且因此可以防止错误放电。
这样描述了本发明,很明显可以做出多种修改。这种修改不应该被认为脱离本发明的精神和范围,并且所有对本领域普通技术人员来说很明显的改变都意在被包括在下面权利要求的范围之中。
Claims (24)
1.一种在选择性擦除模式中驱动等离子显示面板的方法,包括步骤:
在维持周期中交替施加第一维持脉冲到扫描电极线和维持电极线;
在维持周期中施加作为最后的维持脉冲的、具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲到扫描电极线;以及
在施加第二维持脉冲之前,将壁电荷增强脉冲施加到扫描电极线。
2.如权利要求1所述的方法,进一步包括步骤:当施加壁电荷增强脉冲时,将同步脉冲施加到没有施加壁电荷增强脉冲的维持电极线,使得该同步脉冲和壁电荷增强脉冲同步。
3.如权利要求2所述的方法,其中,该同步脉冲是方波。
4.如权利要求2所述的方法,其中,该同步脉冲被设置为具有和第一维持脉冲相同的电压值。
5.如权利要求1所述的方法,其中,该壁电荷增强脉冲具有负极性的电压。
6.如权利要求1所述的方法,其中,该壁电荷增强脉冲是倾斜下降的斜面波形。
7.如权利要求5所述的方法,其中,该壁电荷增强脉冲的电压下降到从-80V到-60V的电压范围。
8.如权利要求5所述的方法,其中,该壁电荷增强脉冲的电压下降到从-72V到-68V的电压范围。
9.如权利要求1所述的方法,其中,该壁电荷增强脉冲的应用时间被设置为在2μs和3μs之间的范围中。
10.如权利要求1所述的方法,其中,该壁电荷增强脉冲被在一帧中包括的所有子场的维持周期中施加。
11.如权利要求1所述的方法,其中,该壁电荷增强脉冲被在一帧中包括的多个子场中除了最后一个的剩余子场的维持周期中施加。
12.如权利要求1所述的方法,其中,该壁电荷增强脉冲仅在低温环境驱动面板时被施加。
13.一种驱动等离子显示面板的方法,其中,一帧包括多个选择性写入子场和多个选择性擦除子场,该方法包括步骤:
在所有的多个选择性写入子场和多个选择性擦除子场的维持周期期间交替施加第一维持脉冲到扫描电极线和维持电极线;
在维持周期中施加作为最后的维持脉冲的、具有比第一维持脉冲更宽的脉冲宽度的第二维持脉冲到扫描电极线;以及
在施加第二维持脉冲之前,将壁电荷增强脉冲施加到扫描电极线。
14.如权利要求13所述的方法,进一步包括步骤:当应用壁电荷增强脉冲时,将同步脉冲加到没有应用壁电荷增强脉冲的维持电极线,使得该同步脉冲和壁电荷增强脉冲同步。
15.如权利要求14所述的方法,其中,该同步脉冲是方波。
16.如权利要求14所述的方法,其中,该同步脉冲被设置为具有和第一维持脉冲相同的电压值。
17.如权利要求13所述的方法,其中,该壁电荷增强脉冲具有负极性的电压。
18.如权利要求13所述的方法,其中,该壁电荷增强脉冲是倾斜下降的斜面波形。
19.如权利要求17所述的方法,其中,该壁电荷增强脉冲的电压下降到从-80V到-60V的电压范围。
20.如权利要求19所述的方法,其中,该壁电荷增强脉冲的电压下降到从-72V到-68V的电压范围。
21.如权利要求13所述的方法,其中,该壁电荷增强脉冲的应用时间被设置为在2μs和3μs之间的范围中。
22.如权利要求13所述的方法,其中,该壁电荷增强脉冲被施加在选择性擦除子场的维持周期和位于选择性擦除子场之前的最后的选择性写入子场的维持周期中。
23.如权利要求13所述的方法,其中,该壁电荷增强脉冲被施加在除了最后选择性擦除子场的剩余选择性擦除子场的维持周期和位于选择性擦除子场之前的最后的选择性写入子场的维持周期中。
24.如权利要求13所述的方法,其中,该壁电荷增强脉冲仅在低温环境下驱动面板时被施加。
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KR100637512B1 (ko) * | 2004-11-09 | 2006-10-23 | 삼성에스디아이 주식회사 | 플라즈마 표시 패널의 구동 방법 및 플라즈마 표시 장치 |
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KR100708691B1 (ko) | 2005-06-11 | 2007-04-17 | 삼성에스디아이 주식회사 | 플라즈마 디스플레이 패널의 구동 방법 및 그 구동 방법에의해 구동되는 플라즈마 디스플레이 패널 |
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KR100728163B1 (ko) * | 2005-10-12 | 2007-06-13 | 삼성에스디아이 주식회사 | 플라즈마 표시 장치 및 그 구동 방법 |
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US20050162351A1 (en) | 2005-07-28 |
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KR100524310B1 (ko) | 2005-10-28 |
TW200527353A (en) | 2005-08-16 |
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JP4639070B2 (ja) | 2011-02-23 |
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