CN1702715A - 等离子体显示设备和等离子体显示面板的驱动方法 - Google Patents

等离子体显示设备和等离子体显示面板的驱动方法 Download PDF

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CN1702715A
CN1702715A CNA2005100729084A CN200510072908A CN1702715A CN 1702715 A CN1702715 A CN 1702715A CN A2005100729084 A CNA2005100729084 A CN A2005100729084A CN 200510072908 A CN200510072908 A CN 200510072908A CN 1702715 A CN1702715 A CN 1702715A
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plasma display
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voltage
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reset
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金德玹
金镇成
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Samsung SDI Co Ltd
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2007Display of intermediate tones
    • G09G3/2018Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2033Display of intermediate tones by time modulation using two or more time intervals using sub-frames with splitting one or more sub-frames corresponding to the most significant bits into two or more sub-frames
    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/28Control 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
    • G09G3/288Control 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
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    • G09G3/22Control 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
    • G09G3/28Control 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
    • G09G3/288Control 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
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    • G09G3/28Control 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
    • G09G3/288Control 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
    • G09G3/291Control 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
    • G09G3/292Control 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
    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/28Control 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
    • G09G3/288Control 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
    • G09G3/291Control 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
    • G09G3/294Control 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 lighting or sustain discharge
    • G09G3/2944Control 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 lighting or sustain discharge by varying the frequency of sustain pulses or the number of sustain pulses proportionally in each subfield of the whole frame
    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0247Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0266Reduction of sub-frame artefacts
    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • GPHYSICS
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    • GPHYSICS
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2007Display of intermediate tones
    • G09G3/2018Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022Display of intermediate tones by time modulation using two or more time intervals using sub-frames

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Abstract

在子场组的子场的复位周期中,相应于输入视频信号计算负载比率,然后在第一周期期间向扫描电极施加逐渐增加的电压。该逐渐增加的电压相应于负载比率从第一电压增加到第二电压。在施加逐渐增加的电压之后在第二周期期间施加第三电压。第一周期和第二周期依赖于负载比率而改变。

Description

等离子体显示设备和等离子体显示面板的驱动方法
技术领域
本发明涉及一种等离子体显示面板(plasma display panel,PDP)的驱动方法和等离子体显示设备。具体地,本发明涉及一种PDP的驱动方法,其中,当基于50Hz的逐行倒相(phase alternation line,PAL)视频信号的输入实现图像时,根据包括在帧中的空闲周期改变复位期,由此稳定了空闲周期后的复位放电,从而在后续的寻址和维持放电中减少了错误点火(misfiring)。
背景技术
PDP具有以矩阵形式排列的多个放电单元,并且通过选择性地使单元放电使得作为电信号输入的图像数据可视化。
根据公开了一种PDP驱动方法的韩国专利公布No.10-2000-0053573,至少在多个子场中的一个预定子场中,该子场中的维持周期中的至少一部分维持操作,以及后继子场中的复位周期中的至少一部分复位操作同时执行。此外,在同时执行子场中的至少一部分维持操作以及后继子场中的至少一部分复位操作之后,通过下降斜坡(falling ramp)电压执行复位周期的复位操作。在至少一个预定子场中通过上升斜坡(rising ramp)电压执行的复位操作被称作主复位,而在至少一个预定子场中通过下降斜坡电压执行的复位操作被称作辅助复位(auxiliary reset)。
根据这种方法,在第二子场后的子场中,仅在紧邻的先前子场中显示的放电单元处产生初始化放电,而在紧邻的先前子场中没有显示的放电单元处防止初始化放电。
此外,由于相当大地减少了复位周期所需的时间并且不需要用于擦除操作的时间,所以与其它方法相比可相当大地减少驱动时间。
但是,就根据实现PAL视频信号的图像的PDP驱动方法的在位于子场组的最前的空闲周期之后的主复位操作的性能而言,当空闲时间长时,由先前放电形成的起动粒子(priming particle)减少,因此复位操作变得不稳定。这可能引起后续的寻址和/或维持周期中的错误点火。
本部分公开的信息仅为了增强对本发明背景的理解,因而,除非相反地明确说明,否则不应该认为确认或者任何形式的暗示该信息形成了在本国已为本领域普通技术人员公知的现有技术。
发明内容
提出了本发明以试图提供一种等离子体显示面板的驱动方法,其具有当空闲周期长时通过增加复位期而得到稳定的复位放电的优点。
等离子体显示面板的一种示例性驱动方法用于下述等离子体显示面板,其通过响应于输入视频信号组合从显示在等离子体显示面板上的帧的图像划分得到的多个子场的亮度权重实现灰度等级(grayscale),其中,该多个子场包括至少两个连续的第一和第二子场组,该至少两个子场组的每个包括复位周期、寻址周期和维持周期。
根据这样的驱动方法,在子场组的至少一个子场的复位周期中,相应于视频信号计算负载比率(load ratio)。在第一周期期间向扫描电极施加逐渐增加的电压,其中,该逐渐增加的电压相应于负载比率从第一电压增加到第二电压。在施加该逐渐增加的电压之后的第二周期期间施加第三电压。依赖于负载比率改变第一周期和第二周期。
根据本发明实施例的示例性等离子体显示设备包括等离子体显示面板和驱动电路。等离子体显示面板具有多个第一电极、多个第二电极以及在与第一和第二电极交叉的方向形成的多个第三电极。驱动电路响应于输入视频信号通过具有至少两个子场组的帧驱动等离子体显示面板,并且在复位、寻址和维持周期中向第一、第二和第三电极输出驱动信号。在子场组的至少一个子场的复位周期中,驱动电路在第一周期期间向扫描电极施加逐渐增加的电压,该逐渐增加的电压相应于输入视频信号的负载比率从第一电压增加到第二电压,然后驱动电路在第二周期维持第二电压的供给。依赖于负载比率改变第一周期和第二周期。
附图说明
通过参考下面的详细说明并结合附图,本发明的更完全的理解以及其许多附带优点将很快变清楚同时变得更好理解,在所述附图中,类似的标号指示相同或者类似的组件,其中:
图1是交流(alternating current,AC)等离子体显示面板(PDP)的部门剖面透视图。
图2图示了PDP的电极排列图。
图3图示了子场排列。
图4图示了通过改变图3中所示的子场排列中的空闲周期的位置而获得的子场排列。
图5图示了根据驱动方法的PDP的驱动波形图。
图6图示了根据本发明实施例的等离子体显示设备的示意布局图。
图7A和图7B图示了根据图4中所示的子场方案中的空闲周期的子场排列,其中图7A涉及短空闲周期的情况,而图7B涉及长空闲周期的情况。
图8图示了根据本发明第一实施例的PDP的驱动波形。
图9图示了根据本发明第二实施例的PDP的驱动波形。
具体实施方式
在以下的详细描述中,简单地作为举例说明,仅示出和描述了本发明的某些示例性实施例。如本领域技术人员将了解到的,所描述的实施例可以各种不同方式来修改,所有的都不背离本发明的精神和范围。因此,附图和描述应被认为本质上说明性的,而不是限制性的。贯穿始终,类似的标号指示类似的元件。
图1是交流(AC)等离子体显示面板(PDP)的部分剖面透视图。
如图1所示,在玻璃基板1上并行成对地排列了覆盖有电介质层2和保护层3的扫描电极4和维持电极5。在玻璃基板6上形成了覆盖有绝缘层7的多个寻址电极8。在绝缘层7上,在寻址电极8之间并与之平行地形成了阻挡脊(barrier rib)9。此外,在绝缘层7的表面上和阻挡脊9的两个侧面上形成了磷光体10。玻璃基板1和6彼此相对地排列,并且在玻璃基板1和6之间具有放电空间11,从而扫描电极4和维持电极5与寻址电极8相垂直。在寻址电极8分别和一对扫描电极4及维持电极5的交叉区域形成的放电空间形成了放电单元12。
图2图示了PDP的电极排列图,图3图示了子场排列。
如图2所示,以m×n的矩阵格式排列PDP的电极。更详细地,将寻址电极A1-Am排列在列方向,而将扫描电极Y1-Yn和维持电极X1-Xn交替排列在行方向。
通常,这样的AC PDP的驱动方法可表示为根据时间的操作变化,其包括复位周期、寻址周期和维持周期。
复位周期是为了初始化每个放电单元的状态,从而有利于关于放电单元的寻址操作。寻址周期是为了选择导通/关闭(turn-on/turn-off)的单元(即,要导通或关闭的单元)并且关于导通单元(即,寻址单元)积累壁电荷。维持周期是为了引起放电,以用寻址单元显示图像。
这样的PDP应该能够显示灰度等级从而其可以显示颜色。为了进行等级显示(gradation display),采用下述方法,其中,一个场被划分成多个子场,并且以分时(time-sharing)方式控制子场。
闪烁与人类眼睛的视觉特性密切相关,通常,随着屏幕变大或频率下降,闪烁更容易察觉。
用PDP实现PAL视频信号的图像的情况满足上面提到的两个条件,使得导致大量闪烁。
因而,当通过使用作为用于PDP的子场的通常排列的最小增量排列(minimum increment arrangement)或者最小减量排列(minimum decrementarrangement)在50Hz驱动PDP时,产生大量闪烁。
由于在引起闪烁的上面提到的两个条件中不能控制屏幕的大小,因而使用一种控制频率的方法来减少闪烁。
韩国专利公布No.10-2000-0016955公开了一种通过控制频率减少闪烁产生的方法。为了减少当输入50Hz视频信号及驱动PDP时产生的大屏幕闪烁,单个帧中的子场被划分成两组G1和G2,以及除LSB(least significant bit,最低有效位)子场外,设定组的子场具有相同的配置,或者辉度(luminance)权重被类似地分配给各组的子场,如图3所示。上述方法比诸如最小增量排列或者最小减量排列的其它子场排列有效得多。
参考图3,单个帧的子场被划分成两组,并且提供了两个空闲周期,一个空闲周期位于帧的末端,即第二组G2的末端,另一空闲周期位于两个组G1和G2之间,即,在第一组G1的末端。
但是,可根据对于具有两个空闲周期的帧的参考点被置于何处来改变空闲周期的位置。例如,与图3中所示的子场排列相反,空闲周期和可以分别置于组G1和G2的最前面。
图4图示了通过改变图3中所示的子场排列中的空闲周期的位置而获得的这样的子场排列。
参考图4,在具有两个组的单个帧中包含了两个空闲周期,该两个空闲周期分别置于第一和第二组G1和G2的最前面。
图5图示了根据驱动方法的PDP的驱动波形图。具体地,现将参考图5详细描述PDP的驱动方法,更特别地,将结合实现上述PAL视频信号的图像的PDP情况来描述驱动方法。
如图5所示,根据驱动方法,在其中一个帧被划分成14个子场且子场被划分成两组的子场排列中,每个子场包括复位周期、寻址周期和维持周期。
在下文中,将参考图6详细描述根据本发明实施例的等离子体显示设备的布局和操作,图6图示了根据本发明实施例的等离子体显示设备的示意性布局。
如图6所示,根据本发明实施例的等离子体显示设备包括等离子体面板100、寻址驱动器200、扫描驱动器300、控制器400和维持驱动器500。
等离子体面板100包括在列方向延伸的多个寻址电极A1-Am,以及分别在行方向上延伸的多个扫描电极和维持电极Y1-Yn和X1-Xn。地址缓冲器板(address buffer board)100接收来自控制器400的寻址驱动控制信号SA,并且向寻址电极A1-Am施加用于选择导通放电单元(即,要导通的放电单元)的电压。
扫描驱动器300和维持驱动器500分别接收来自控制器400的扫描电极驱动信号SY和维持电极驱动信号SX,并且将它们分别施加给扫描电极Y1-Yn和维持电极X1-Xn
自外部接收视频信号的控制器400产生寻址驱动控制信号SA、扫描电极驱动信号SY和维持电极驱动信号SX,并且将它们分别施加给寻址驱动器200、扫描驱动器300和维持驱动器500。
具体地,根据本发明实施例,控制器400将包含在用于实现PAL视频信号的图像的帧中的多个子场划分成至少两组。控制器400产生控制信号,以相应于输入PAL视频信号的负载比率改变在每个组的最前面子场的复位周期中施加的复位波形的复位期,并且将所产生的控制信号传送到扫描驱动器300。
下文中,将参考附图详细描述根据本发明实施例的等离子体显示面板的驱动方法。
图7A和图7B图示了根据图4中所示的子场方案中的空闲周期的子场排列,其中图7A涉及短空闲周期的情况,而图7B涉及长空闲周期的情况。
如图7A和图7B中所示,根据本发明实施例的子场被划分成2个单独的子场组G1和G2。此外,子场排列中包含两个空闲周期。即,第一组G1的空闲周期和第二组的空闲周期分别位于子场组G1和G2中的最前面。
根据本发明实施例,两个单独的子场组G1和G2分别包括七个子场SF1-SF7和五个子场SF8-SF12。每个子场组的亮度权值被设计成从较低到较高子场逐渐增加。但是,当实际使用时本领域的普通技术人员可改变这样的设计。
另一方面,由于PDP的功率消耗根据其驱动特性是高电平,所以通常采用一种自动功率控制(automatic power control,APC)方法,其中基于显示帧的负载比率或者平均信号电平控制功率消耗。根据这样的APC方法,依赖于输入图像数据的负载比率改变APC电平,并且相应于相应的APC电平控制维持脉冲的数目,从而功率消耗可以保持低于预定电平。
根据这样的APC方法,各子场中施加的维持脉冲的数目根据负载比率变化。即,组G1和G2中施加的维持脉冲的总数目是根据负载比率变化的,因而,每个子场中施加的维持脉冲的数目也据此变化,这是因为每个子场具有数目上与分配给子场的亮度权值相应的维持脉冲。
如上所述,在APC方法中,随着负载比率增加,根据预定的APC电平,减少维持脉冲的数目,从而可以防止功率消耗的过度增加。另一方面,空闲周期根据负载比率改变,且空闲周期随着负载比例增加而变长。
由于如参考图7A和7B所述的那样空闲周期根据负载比率而改变,所以从一个帧划分得到的两个子场组G1和G2的起始点也可以改变。
另一方面,根据等离子体显示面板的另一驱动方法,不管空闲周期如何,复位操作周期保持相同。在等离子体显示面板中,随着从放电操作起时间的进行,由放电操作形成的起动粒子和壁电荷被消除。因而,当空闲周期更长时,其这样的消除可能变为实质性的,使得复位放电变得难于在空闲周期后产生。例如,当子场组G1和G2(图7A中示出)之间的空闲周期延长时,复位放电变得难于在子场组G2的最前面子场中的复位周期中产生。此外,当先前帧的最后子场组(图7A中未示出)和子场组G1(图7A中示出)之间的空闲周期延长时,复位放电变得难于在子场组G1的最前面子场中的复位周期中产生。即,当空闲周期位于同一帧中的子场组之间或者帧和后继帧之间(例如,先前帧的最后子场组和当前帧的最前面子场组之间)时,因为壁电荷和起动粒子的消除,所以复位放电变得难于在后继子场的复位周期中产生。
因而,根据本发明实施例,提出了等离子体显示面板的驱动波形,以通过根据基于负载比率改变的空闲周期改变复位周期的复位期来提供更稳定的复位放电。具体地,对于长空闲周期通过进一步增加复位周期的复位期,获得了更稳定的复位放电。
图8和图9图示了分别根据本发明的第一和第二实施例的PDP的驱动波形。
如图8和图9中所示,在根据本发明实施例的等离子体显示面板的驱动方法中,复位周期的复位操作周期根据空闲周期改变。
根据等离子体显示面板的其它驱动方法,不管空闲周期如何,用于复位操作的周期是相同的。如上所讨论的,因为壁电荷和起动粒子的消除随着空闲周期变长而变为更实质性的,所以随着空闲周期变长复位放电变得更不稳定。但是,根据本发明实施例,当空闲周期变长时,比其它复位操作周期更充分地提供复位期,从而可以实现稳定的复位放电。
参考图8,根据本发明第一实施例,与其它复位驱动波形形成对比,增加了总的复位操作周期和斜坡波形的期间,以稳定复位放电。例如,在其中包括上升斜坡周期的总复位操作周期通常约150us,以及上升沿斜坡周期的持续时间通常约120us的情况下,将总复位操作周期增加到约200us并且,具体地,上升斜坡周期的持续时间增加到约170us。然后,与其它方法中的相比,使在放电单元中的弱放电维持更久,因此,放电单元的状态变得更稳定。
此外,参考图9,根据本发明第二实施例,总复位周期增加到200us,这与第一实施例中的相同。但是,并不增强上升斜坡周期,而是仅增加在上升斜坡周期的结束之后施加电压Vset的周期。因而,可以控制由于斜坡复位操作而经历弱放电的放电单元的状态以更稳定,这样,复位周期的复位放电针对长空闲周期变得稳定。
如上所述,等离子体显示面板的驱动波形,具体地,用于空闲周期后的子场中的复位操作的波形是根据空闲周期改变的。因而,复位周期变得稳定,并因此减少了后期寻址和维持放电中的错误点火。
尽管已示出并描述了本发明实施例中的复位操作周期改变的特定示例,但是,应该理解,可在本发明的精神和范围内改变总操作周期和斜坡操作期间。
如上所述,根据本发明实施例,在PAL模式的子场排列结构中,当空闲周期长时,增加用于复位放电的复位波形的周期,因此使空闲周期之后的复位放电稳定,由此减少了后继寻址和维持放电中的错误点火。
虽然关于目前认为的实际示例性实施例描述了本发明,但是应该理解,本发明并不限于所公开的实施例,而是相反,旨在覆盖包含于所附权利要求的精神和范围内的各种修改和等价安排。

Claims (16)

1.一种等离子体显示面板的驱动方法,该等离子体显示面板通过响应于输入视频信号组合从显示在等离子体显示面板上的帧的图像划分得到的多个子场的亮度权重实现灰度等级,该多个子场包括至少两个子场组,所述至少两个子场组的每个子场包括复位周期、寻址周期和维持周期;
在所述至少两个子场组的至少一个子场的复位周期中,该驱动方法包括下述步骤:
计算相应于该视频信号的负载比率;
在第一周期期间向扫描电极施加逐渐增加的电压,该逐渐增加的电压相应于该负载比率从第一电压增加到第二电压;以及
在施加该逐渐增加的电压之后在第二周期期间施加第三电压,其中依赖于负载比率改变第一周期和第二周期。
2.如权利要求1所述的驱动方法,其中,依赖于负载比率而改变在所述至少两个子场组之前的空闲周期。
3.如权利要求2所述的驱动方法,其中所述空闲周期随着负载比率增加而变长。
4.如权利要求2所述的驱动方法,其中所述第一周期随着空闲周期变长而变长。
5.如权利要求2所述的驱动方法,其中所述第二周期随着空闲周期变长而变长。
6.如权利要求2所述的驱动方法,其中将所述空闲周期置于所述至少两个子场组的第一子场组和第二子场组之间。
7.如权利要求2所述的驱动方法,其中将所述空闲周期置于第一子场组和该第一子场组的先前子场组之间。
8.如权利要求1所述的驱动方法,其中所述等离子体显示面板的输入视频信号是PAL视频信号。
9.如权利要求1所述的驱动方法,其中所述至少一个子场的复位周期是所述至少两个子场组的每个中的最前面子场的复位周期。
10.一种等离子体显示设备,包括:
等离子体显示面板,其包括多个第一电极和多个第二电极,并且包括在与第一和第二电极的方向相交叉的方向上形成的多个第三电极;以及
驱动电路,用于响应于输入视频信号通过具有至少两个子场组的帧驱动等离子体显示面板,以及用于在复位、寻址和维持周期中向所述第一、第二和第三电极输出驱动信号;
其中,在所述至少两个子场组的至少一个子场的复位周期中,所述驱动电路在第一周期期间向扫描电极施加逐渐增加的电压,该逐渐增加的电压相应于输入视频信号的负载比率从第一电压增加到第二电压,并且所述驱动电路然后在第二周期维持第二电压的供给;以及
其中,依赖于负载比率改变第一周期和第二周期。
11.如权利要求10所述的等离子体显示设备,其中,所述至少两个子场组的每个的前面的空闲周期随着负载比率增加而变长。
12.如权利要求10所述的等离子体显示设备,其中,所述至少两个子场组的每个的后面的空闲周期随着负载比率增加而变长。
13.如权利要求11所述的等离子体显示设备,其中所述第一周期随着负载比率增加而变长。
14.如权利要求11所述的等离子体显示设备,其中所述第二周期随着负载比率增加而变长。
15.如权利要求10所述的等离子体显示设备,其中所述复位周期包括在所述至少两个子场组的每个的最前面子场中的复位周期。
16.如权利要求10所述的等离子体显示设备,其中所述等离子体显示面板的输入视频信号包括逐行倒相(PAL)视频信号。
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