CN110223642B - 一种画面补偿方法和显示装置 - Google Patents

一种画面补偿方法和显示装置 Download PDF

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CN110223642B
CN110223642B CN201910472981.2A CN201910472981A CN110223642B CN 110223642 B CN110223642 B CN 110223642B CN 201910472981 A CN201910472981 A CN 201910472981A CN 110223642 B CN110223642 B CN 110223642B
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pixels
scanning line
voltage
data voltage
pixel
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CN110223642A (zh
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郑天春
郑义
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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Priority to CN201910472981.2A priority Critical patent/CN110223642B/zh
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Priority to KR1020217022752A priority patent/KR102635144B1/ko
Priority to JP2021544939A priority patent/JP7237170B2/ja
Priority to PCT/CN2019/116376 priority patent/WO2020238037A1/zh
Priority to EP19931234.9A priority patent/EP3910619A4/en
Priority to TW108142620A priority patent/TWI713012B/zh
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    • 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
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    • G09G3/30—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 electroluminescent panels
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    • G09G3/3225—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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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
    • G09G3/30—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 electroluminescent panels
    • G09G3/32—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract

本申请公开了一种画面补偿方法和显示装置，所述补偿方法包括：获得第N扫描行像素中不发光像素占第N扫描行所有像素的比值，其中，所述不发光像素接收/预设接收第一数据电压；获得第N‑1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压；若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值；对所述第N扫描行像素中其他像素补偿所述电压值后显示图片。通过上述方式，本申请能够在不改变显示装置内部结构的基础上实现降低线串扰的目的。

Description

一种画面补偿方法和显示装置
技术领域
本申请涉及显示技术领域，特别是涉及一种画面补偿方法和显示装置。
背景技术
在显示装置中，线串扰一般发生在从黑画面切换到白画面或者白画面切换到黑画面时，黑画面与白画面的交界线的延长线上。一般而言，黑画面与白画面的交界线长度越长，线串扰产生的亮线或暗线就越明显。目前，一般通过改变显示装置中的内部结构以削弱电源线和数据线之间的耦合电容，进而达到降低线串扰的目的。
本申请的发明人在长期研究过程中发现，现有从内部结构方面进行改善线串扰的方式，较为复杂且工艺制程中可能会引入其他问题。
发明内容
本申请主要解决的技术问题是提供一种画面补偿方法和显示装置，能够在不改变显示装置内部结构的基础上实现降低线串扰的目的。
为解决上述技术问题，本申请采用的一个技术方案是：提供一种画面补偿方法，所述补偿方法包括：获得第N扫描行像素中不发光像素占第N扫描行所有像素的比值，其中，所述不发光像素接收/预设接收第一数据电压；获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压；若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值；对所述第N扫描行像素中其他像素补偿所述电压值后显示图片。
其中，所述若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，包括：在所述第N-1扫描行像素和所述第N扫描行像素之间，若所述第二数据电压小于所述第一数据电压，则所述第一数据电压和所述第二数据电压之间存在跳变关系；利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，其中，所需补偿的所述电压值与所述比值正相关。
其中，所需补偿的所述电压值与所述比值线性正相关。
其中，所述对所述第N扫描行像素中其他像素补偿所述电压值后显示图片，包括：将所述第N扫描行像素中其他像素的预定数据电压增加所述电压值后显示图片。
其中，所述若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，包括：在所述第N扫描行像素与所述第N+1扫描行像素之间，若所述第二数据电压小于所述第一数据电压，则所述第一数据电压和所述第二数据电压之间存在跳变关系；利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值；其中，所需补偿的所述电压值与所述比值反相关。
其中，所需补偿的所述电压值与所述比值线性反相关。
其中，所述对所述第N扫描行像素中其他像素补偿所述电压值后显示图片，包括：将所述第N扫描行像素中其他像素的预定数据电压降低所述电压值后显示图片。
其中，所述获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压之前，所述补偿方法还包括：判断所述比值是否大于等于阈值；若是，则进入所述获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压的步骤；否则，正常显示图片。
其中，所述阈值为0-0.2。
为解决上述技术问题，本申请采用的另一个技术方案是：提供一种显示装置，所述显示装置包括：像素驱动电路，包括用于传输扫描信号的扫描线、用于传输数据信号的数据线、以及用于传输电压信号的电源线；驱动芯片，与所述扫描线和/或所述数据线和/或所述电源线耦接，用于实现上述任一实施例所述的画面补偿方法。
本申请的有益效果是：区别于现有技术的情况，本申请所提供的画面补偿方法中在扫描方向上，根据黑画面切白画面或者白画面切黑画面的跳变关系、以及当前第N扫描行像素中不发光像素占第N扫描行所有像素的比值获得所需要补偿的电压值，对第N扫描行像素中其他像素补偿该电压值后显示图片。即本申请通过软件方式实现降低线串扰的目的，与现有的通过改变内部结构方式相比，其更为简单，且时效性更高。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。其中：
图1为显示装置一实施方式的结构示意图；
图2为本申请画面补偿方法一实施方式的流程示意图；
图3为待显示或者正在显示的图片一实施方式的结构示意图；
图4为图3中图片对应的一实施方式的时序示意图；
图5为图1中步骤S103一实施方式的流程示意图；
图6为所需补偿的电压值与比值一实施方式的关系示意图；
图7为图1中步骤S103另一实施方式的流程示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参阅图1，图1为显示装置一实施方式的结构示意图，该显示装置1包括像素驱动电路10和驱动芯片。
具体地，像素驱动电路10包括用于传输扫描信号的多条扫描线100、用于传输数据信号的多条数据线102、以及用于传输电压信号的多条电源线104。如图1所示，多条扫描线100和多条数据线102垂直相交设置，以形成多个像素单元106。每行像素单元106分别与对应的扫描线100和对应的电源线104连接，每列像素单元106分别与对应的数据线102连接。
驱动芯片(未标示)与扫描线100和/或数据线102和/或电源线104耦接，驱动芯片在图片显示前或者显示后执行画面补偿方法，以使得补偿后显示的图片中线串扰现象降低，具体画面补偿方法将在后续实施例中说明。在本实施例中，驱动芯片可以包括扫描驱动芯片120、数据驱动芯片122、电源驱动芯片124，多条扫描线100与扫描驱动芯片120连接，多条数据线102与数据驱动芯片122连接，多条电源线104与电源驱动芯片124连接。当然，在其他实施例中，扫描驱动芯片120、数据驱动芯片122以及电源驱动芯片124中的全部或者部分可以集成到同一个驱动芯片上。执行画面补偿方法的驱动芯片可以是数据驱动芯片122，也可以是电源驱动芯片124，又可以是与数据驱动芯片122或电源驱动芯片124耦接的另一驱动芯片，另一驱动芯片在处理获得要补偿的电压值后，将电压值发送至对应的数据驱动芯片122或电源驱动芯片124，然后数据驱动芯片122或电源驱动芯片124对相应的电压值进行补偿。
请参阅图2-图4，图2为本申请画面补偿方法一实施方式的流程示意图，图3为待显示或者正在显示的图片一实施方式的结构示意图，图4为图3中图片对应的一实施方式的时序示意图。该补偿方法包括：
S101：获得第N扫描行像素中不发光像素占第N扫描行所有像素的比值，其中，不发光像素接收/预设接收第一数据电压。
具体地，本申请所提供的画面补偿方法可以应用于已经显示的图片或者即将显示的图片。当应用于已经显示的图片时，上述步骤S101中不发光像素接收第一数据电压；当应用于即将显示的图片时，上述步骤S101中不发光像素预设接收第一数据电压。
在一个应用场景中，上述步骤S101的实现方式可以为：统计第N扫描行中不发光像素的个数占第N扫描行所有像素的个数的比值。
在另一个应用场景中，当一个像素由一个驱动晶体管驱动时，上述步骤S101的实现方式还可以为：统计第N扫描行中驱动晶体管关闭的个数占第N扫描行所有驱动晶体管的个数的比值。
在又一个应用场景中，当图片中不发光像素为连续不发光像素时，如图3所示，上述步骤S101的实现方式还可以为：获得连续不发光像素的长度b占显示区长度c的比值。
S102：获得第N-1扫描行像素和第N+1扫描行像素中与不发光像素处于同一列的像素接收/预设接收的第二数据电压。
S103：若第一数据电压与第二数据电压之间存在跳变关系，则利用跳变关系和比值获得第N扫描行像素中其他像素所需补偿的电压值。
具体地，在一个应用场景中，请一并参阅图3、图4和图5，图5为图1中步骤S103一实施方式的流程示意图，上述步骤S103具体包括：
S201：在第N-1扫描行像素和第N扫描行像素之间，若第二数据电压小于第一数据电压，则第一数据电压和第二数据电压之间存在跳变关系。
具体地，如图3中所示，在第M-1扫描行至第M扫描行方向上，图片从白画面切入到黑画面，第M扫描行不发光像素对应的第一数据线dataA的第一数据电压为高电平，第M-1扫描行中与不发光像素处于同一列的像素对应的第二数据电压为低电平，第一数据电压和第二数据电压之间存在跳变关系。即在第M扫描行不发光像素位置处，从白画面切入到黑画面时，第一数据线dataA存在畸变，由于第一数据线dataA与电源线之间的耦合效应，使得第M扫描行的电源线的电源电压VDD突变为高电平。
由于IOLED＝k(VDD-Vdate-Vth)2，其中，k为驱动薄膜晶体管的电流放大系数，VDD为电源电压，Vdata为数据电压，Vth为驱动晶体管的阈值电压；对于第M扫描行像素中的其他像素而言，电源线的电源电压VDD由于耦合效应突变为高电平，导致流过其驱动晶体管的电流增大，若不对其进行补偿处理，则第M扫描行像素中的其他像素位置处产生亮线。
S202：利用跳变关系和比值获得第N扫描行像素中其他像素所需补偿的电压值，其中，所需补偿的电压值与比值正相关。
具体地，如图6所示，图6为所需补偿的电压值与比值一实施方式的关系示意图。当跳变关系为白画面切入到黑画面时，上述步骤S101中获得的比值越大，所需补偿的电压值越大。在本实施例中，所需补偿的电压值与比值线性正相关，例如，如图6中虚线所示，ΔV＝100毫伏*K，其中，ΔV为所需补偿的电压值，K为比值。当所需补偿的电压值与比值线性正相关时，可以降低驱动芯片的数据处理量，使得数据处理更为简单。当然，在其他实施方式中，所需补偿的电压值与比值也可为非线性正相关，本申请对此不作限定。
在另一个应用场景中，请一并参阅图3、图4和图7，图7为图1中步骤S103另一实施方式的流程示意图，上述步骤S103具体包括：
S301：在第N扫描行像素与第N+1扫描行像素之间，若第二数据电压小于第一数据电压，则第一数据电压和第二数据电压之间存在跳变关系。
具体地，如图3中所示，第P扫描行至第P+1扫描行方向上，图片从黑画面切入到白画面，第P扫描行不发光像素对应的第一数据线dataA的第一数据电压为高电平，第P+1扫描行中与不发光像素处于同一列的像素对应的第二数据电压为低电平，第一数据电压和第二数据电压之间存在跳变关系。即在第P扫描行不发光像素位置处，从黑画面切入到白画面时，第一数据线dataA存在畸变，由于第一数据线dataA与电源线之间的耦合效应，使得第P扫描行的电源线的电源电压VDD突变为低电平。
由于IOLED＝k(VDD-Vdate-Vth)2，对于第P扫描行像素中的其他像素而言，电源线的电源电压VDD由于耦合效应突变为低电平，导致流过其驱动晶体管的电流减小，若不对其进行补偿处理，则第P扫描行像素中的其他像素位置处产生暗线。
S302：利用跳变关系和比值获得第N扫描行像素中其他像素所需补偿的电压值；其中，所需补偿的电压值与比值反相关。
具体地，如图6所示，当跳变关系为黑画面切入到白画面时，上述步骤S101中获得的比值越大，所需补偿的电压值越小。在本实施例中，所需补偿的电压值与比值线性反相关。例如，如图6中实线所示，ΔV＝-100毫伏*(K-1)，其中，ΔV为所需补偿的电压值，K为比值。当所需补偿的电压值与比值为线性反相关时，可以降低驱动芯片的数据处理量，使得数据处理更为简单。当然，在其他实施方式中，所需补偿的电压值与比值也可为非线性反相关，本申请对此不作限定。
S104：对第N扫描行像素中其他像素补偿电压值后显示图片。
具体地，当跳变关系为白画面切入到黑画面时，上述步骤S104包括：将第N扫描行像素中其他像素的预定数据电压增加数据电压值后显示图片。由于IOLED＝k(VDD-Vdate-Vth)2，此时通过增加数据电压值可以弥补电源电压VDD突变升高的部分，进而达到降低电流，以削弱亮线的目的。且本实施例中通过补偿数据电压的方式，实现更为简单。当然，在其他实施例中，也可在电源电压VDD、晶体管栅极、晶体管漏极处补偿该电压值，本申请对此不作限定。
当跳变关系为黑画面切入到白画面时，上述步骤S104包括：将第N扫描行像素中其他像素的预定数据电压降低数据电压值后显示图片。由于IOLED＝k(VDD-Vdate-Vth)2，此时通过降低数据电压值可以弥补电源电压VDD突变降低的部分，进而达到提高电流，以削弱暗线的目的。且本实施例中通过补偿数据电压的方式，实现更为简单。当然，在其他实施例中，也可通过在电源电压VDD、晶体管栅极、晶体管漏极处补偿该电压值，本申请对此不作限定。
在又一个实施方式中，上述步骤S102之前，本申请所提供的补偿方法还包括：判断比值是否大于等于阈值；若是，则进入步骤S102；否则，正常显示图片。在本实施例中，阈值可以为0-0.2，例如，0.5、1.0、2.0等。当阈值为2.0时，人眼不太能识别出亮线和暗线，因此，将阈值设置在0-0.2之间可以有效削弱亮线和暗线，降低线串扰现象且降低驱动芯片的数据处理量。
在又一个实施方式中，在上述步骤S101之前，本申请所提供的补偿方法还包括：获得正在显示/待显示图片；判断正在显示/待显示图片中是否包含连续的不发光区域；若是，则获得行方向上不发光区域的边缘的像素信息，并进入获得第N扫描行像素中不发光像素占第N扫描行所有像素的比值的步骤。即如图3中所示，对于一整块连续的不发光区域而言，仅对其边缘处且处于扫描线方向上的第M行像素和第P行像素进行补偿，对于第M行像素和第P行像素之间的像素行不进行处理，以达到降低数据处理量的目的。
以上所述仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (10)

1.一种画面补偿方法，其特征在于，所述补偿方法包括：
获得第N扫描行像素中不发光像素占第N扫描行所有像素的比值，其中，所述不发光像素接收/预设接收第一数据电压；
获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压；
若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值；
对所述第N扫描行像素中其他像素补偿所述电压值后显示图片。
2.根据权利要求1所述的补偿方法，其特征在于，所述若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，包括：
在所述第N-1扫描行像素和所述第N扫描行像素之间，若所述第二数据电压小于所述第一数据电压，则所述第一数据电压和所述第二数据电压之间存在跳变关系；
利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，其中，所需补偿的所述电压值与所述比值正相关。
3.根据权利要求2所述的补偿方法，其特征在于，
所需补偿的所述电压值与所述比值线性正相关。
4.根据权利要求2所述的补偿方法，其特征在于，所述对所述第N扫描行像素中其他像素补偿所述电压值后显示图片，包括：
将所述第N扫描行像素中其他像素的预定数据电压增加所述电压值后显示图片。
5.根据权利要求1所述的补偿方法，其特征在于，所述若所述第一数据电压与所述第二数据电压之间存在跳变关系，则利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值，包括：
在所述第N扫描行像素与所述第N+1扫描行像素之间，若所述第二数据电压小于所述第一数据电压，则所述第一数据电压和所述第二数据电压之间存在跳变关系；
利用所述跳变关系和所述比值获得所述第N扫描行像素中其他像素所需补偿的电压值；其中，所需补偿的所述电压值与所述比值反相关。
6.根据权利要求5所述的补偿方法，其特征在于，
所需补偿的所述电压值与所述比值线性反相关。
7.根据权利要求5所述的补偿方法，其特征在于，所述对所述第N扫描行像素中其他像素补偿所述电压值后显示图片，包括：
将所述第N扫描行像素中其他像素的预定数据电压降低所述电压值后显示图片。
8.根据权利要求1所述的补偿方法，其特征在于，所述获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压之前，所述补偿方法还包括：
判断所述比值是否大于等于阈值；
若是，则进入所述获得第N-1扫描行像素和第N+1扫描行像素中与所述不发光像素处于同一列的像素接收/预设接收的第二数据电压的步骤；
否则，正常显示图片。
9.根据权利要求8所述的补偿方法，其特征在于，
所述阈值为0-0.2。
10.一种显示装置，其特征在于，所述显示装置包括：
像素驱动电路，包括用于传输扫描信号的扫描线、用于传输数据信号的数据线、以及用于传输电压信号的电源线；
驱动芯片，与所述扫描线和/或所述数据线和/或所述电源线耦接，用于实现权利要求1-9任一项所述的画面补偿方法。
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