CN104751783B - 驱动有机发光二极管显示装置的方法 - Google Patents
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Abstract
一种驱动具有第一到第三子像素和白色子像素的有机发光二极管显示装置的方法包括:判定图像数据的灰度级;将所述图像数据分类到低灰度级组、中灰度级组和高灰度级组中;当所述图像数据的灰度级被分类到低灰度级组中时,使用除所述白色子像素之外的所述第一到第三子像素来显示图像;和当所述图像数据的灰度级被分类到中灰度级组和高灰度级组之一中时,使用所述第一到第三子像素和所述白色子像素来显示图像。
Description
本申请要求享有于2013年12月30日在韩国提交的韩国专利申请第10-2013-0167749号的权益,为了所有目的,通过援引将该专利申请并入本文,如同该专利在此被全部阐述一样。
技术领域
本发明涉及一种驱动有机发光二极管显示装置的方法,更特别地,涉及一种驱动有机发光二极管显示装置的方法,其中根据灰度级确定用于显示图像的子像素。
背景技术
近来,随着信息技术的进展,显示装置已迅速进步。在这些进步当中就有具有诸如外形纤薄、重量轻和功耗低的优异性能的平板显示器(FPD)。特定而言,液晶显示(LCD)装置和有机发光二极管(OLED)显示装置已被广泛使用。
与需要背光单元作为额外光源的LCD装置相比,发射型OLED显示装置具有诸如制造工艺简单、外形纤薄和重量轻的优点。并且,OLED显示装置与LCD装置相比具有优异的视角和优异的对比度。进一步地,OLED显示装置由于低功耗而利用直流(DC)低压驱动。这样,容易制造和设计驱动电路。而且,由于OLED显示装置的内部元件由固体结构(solid build)形成,故OLED显示装置具有诸如对抗外部冲击的优异耐用性和宽操作温度范围的优点。
已经根据用户的各种需求对OLED显示装置进行了较为广泛的应用范围的研究。例如,OLED显示装置已被用作台式计算机和壁挂式电视机以及便携式计算机的显示器。还已研究了具有较大显示区域的OLED显示装置。
OLED显示装置使用诸如红、绿和蓝这样的三原色来显示图像。近来,OLED显示装置已使用诸如红、绿、蓝和白这样的四种颜色来显示图像,以提高亮度并降低功耗。
图1是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的亮度的曲线图。图2是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的亮度比的曲线图。图3是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的数据电压的曲线图。
参见图1,当使用红、绿、蓝和白色子像素来显示白色图像时,大部分亮度通过白色子像素来表现,而用于调整对应于所需色温的颜色的其它亮度则通过红、绿和蓝色子像素来表现。
参见图2,例如,当显示具有大约100%亮度比的白色图像时,白色子像素表现大约80%的亮度比,而红、绿和蓝色子像素表现大约20%的亮度比。据此,随着灰度级增加,用于驱动白色子像素的发光二极管的数据电压增加。
参见图3,例如,尽管用于第255级灰度级的红、绿和蓝色子像素中的每个的数据电压为大约4V,但用于第255级灰度级的白色子像素的数据电压为大约16V。
结果,与四色子像素的白色子像素以及三色子像素的红、绿、蓝色子像素相比,四色子像素的红、绿、蓝色子像素以低数据电压驱动。
然而,由于红、绿和蓝色子像素的数据电压降低,故当表现相对低的灰度级时,因噪声而降低了显示面板的亮度均匀性。例如,如图3中所示,尽管用于第96级灰度级的白色子像素的数据电压为大约6V,但用于第96级灰度级的红、绿和蓝色子像素的数据电压为大约2V。
图4是示出根据现有技术的有机发光二极管显示装置的由于噪声而导致的数据电压波动的曲线图。图5是示出当通过根据现有技术的有机发光二极管显示装置表现相对较低的灰度级时的亮度不均匀性的图片。
参见图4,包括三种子像素的OLED显示装置的数据电压为第一电压V1,而包括四种子像素的OLED显示装置的数据电压为比第一电压V1小的第二电压V2。与第一电压V1的数据电压相比,第二电压V2的数据电压易受噪声影响。该噪声可以是由外部电路造成或者由诸如反冲(kick-back)现象这样的耦合所导致,所述反冲现象是由于晶体管与栅极线之间的负载造成。
参见图5,当显示面板所显示的相对较低灰度级的图像具有不良的亮度均匀性时,显示出由于高亮度部分和低亮度部分而导致的线性色斑(stain)。
发明内容
因此,本发明涉及一种驱动有机发光二极管显示装置的方法,其能够改善亮度均匀性,从而基本上消除了由于现有技术的限制和缺陷而导致的一个或多个问题。
本发明的目的在于提供一种能够改善亮度均匀性的驱动有机发光二极管显示装置的方法。
本发明的其它优点、目的和特征将在随后的描述中列出,并且一部分将由所述描述而变得明显,或者可以通过对本发明的实施而习得。本发明的目的和其它优点可以通过说明书及其权利要求书以及附图中特别指出的结构来实现和获得。
为实现这些目的和其它优点,并且根据本发明的目的,正如本文所具体和概括描述的那样,一种驱动具有第一到第三子像素和白色子像素的有机发光二极管显示装置的方法包括:判定图像数据的灰度级;当所述图像数据的灰度级被分类到低灰度级组中时,使用除所述白色子像素之外的所述第一到第三子像素来显示图像;和当所述图像数据的灰度级被分类到中灰度级组和高灰度级组之一中时,使用所述第一到第三子像素和所述白色子像素来显示图像。
另一方面,一种驱动具有第一到第三子像素和白色子像素的有机发光二极管显示装置的方法包括:判定图像数据的灰度级;和根据所述图像数据的所述灰度级,通过调整所述第一到第三子像素和所述白色子像素的亮度比来显示图像。
应当理解,前面的概括性描述和下面的详细描述都是示例性的和解释性的,意在提供对要求保护的本发明的进一步解释。
附图说明
被包括来提供对本发明的进一步理解且并入本申请文件而构成本说明书的一部分的附图图解了本发明的实施方式,并与说明书一起用于解释本发明的原理。在附图中:
图1是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的亮度的曲线图;
图2是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的亮度比的曲线图;
图3是示出按照根据现有技术的具有红、绿、蓝和白色子像素的有机发光二极管显示装置的灰度级的数据电压的曲线图;
图4是示出根据现有技术的有机发光二极管显示装置的由于噪声而导致的数据电压波动的曲线图;
图5是示出当通过根据现有技术的有机发光二极管显示装置表现相对较低的灰度级时的亮度不均匀性的图片;
图6是根据本发明第一示例性实施方式的有机发光二极管显示装置的视图;
图7是示出根据本发明第一示例性实施方式的有机发光二极管显示装置的子像素的视图;
图8A到8C是示出根据本发明第一示例性实施方式的驱动有机发光二极管显示装置的方法的视图;
图9是示出通过根据本发明第一示例性实施方式的有机发光二极管显示装置所显示的图像的图片;
图10A到10C是示出根据本发明第二示例性实施方式的驱动有机发光二极管显示装置的方法的视图;
图11是示出按照根据本发明第二示例性实施方式的有机发光二极管显示装置的灰度级的亮度的曲线图;
图12是示出按照根据本发明第二示例性实施方式的有机发光二极管显示装置的灰度级的亮度比的曲线图;和
图13是示出按照根据本发明第二示例性实施方式的有机发光二极管显示装置的灰度级的数据电压的曲线图。
具体实施方式
现在将详细描述优选实施方式,这些实施方式的实例在附图中示出。在整个附图中可使用相同的附图标记来指代相同或类似的部件。在以下描述中,当本文所包含的对已知功能和配置的详细描述可能模糊化本实施方式的主题时,将省略这些详细描述。
下文中,将参考图6至13详细描述示例性实施方式。
图6是根据第一示例性实施方式的有机发光二极管显示装置的视图,图7是示出根据第一示例性实施方式的有机发光二极管显示装置的子像素的视图,而图8A到8C是示出根据本第一示例性实施方式的驱动有机发光二极管显示装置的方法的视图。
在图6和图7中,根据第一示例性实施方式的有机发光二极管(OLED)显示装置包括显示图像的显示面板110、提供数据信号的数据驱动器120、提供栅极信号的栅极驱动器130以及控制数据驱动器120和栅极驱动器130的时序控制器140。
显示面板110包括沿第一方向的多条栅极线GL和沿第二方向的多条数据线DL。多条栅极线GL和多条数据线DL彼此交叉以界定多个子像素SP。包括白色W子像素在内的四个子像素SP构成单个像素。例如,四个子像素SP可包括白色W、红色R、绿色G和蓝色B子像素SP。
参见图7,每个子像素SP包括开关薄膜晶体管(TFT)STr、驱动TFT DTr、感测TFTSSTr、存储电容StgC和发光二极管E。开关TFT STr连接至数据线DL和栅极线GL,驱动TFTDTr连接至开关TFT STr。感测TFT SSTr连接至驱动TFT DTr。
开关TFT STr的栅极连接至栅极线GL,开关TFT STr的源极连接至数据线DL,且开关TFT STr的漏极连接至驱动TFT DTr的栅极。开关TFT STr根据经由栅极线GL的栅极信号而导通/断开。当开关TFT STr导通时,数据线DL的数据信号经由开关TFT STr施加到驱动TFT DTr。
驱动TFT DTr的漏极连接至电源线PL且驱动TFT DTr的源极连接至发光二极管E。驱动TFT DTr可调整流经发光二极管E的电流。例如,流经发光二极管的电流可以与施加到驱动TFT DTr的数据信号的幅度的平方成正比。
存储电容StgC连接在驱动TFT DTr的栅极与源极之间。当开关TFT Str导通时,存储电容StgC存储经由数据线DL施加的数据信号。据此,存储电容StgC保持一帧期间的数据信号,使得流经发光二极管E的电流和由发光二极管E显示的灰度级能够保持恒定。
感测TFT SSTr连接至驱动TFT DTr的源极和基准线(reference line)RL。感测TFTSSTr的栅极连接至感测线(未示出),使得感测TFT SSTr能够根据感测线的感测信号Sence导通/断开。感测信号Sence可在栅极驱动器130(图6)中产生。据此,(图6的)栅极驱动器130可产生包括栅极信号和感测信号在内的多个信号。
感测TFT SSTr检测驱动TFT DTr的阈值电压Vth的变化。此外,阈值电压Vth的变化被传送到(图6的)时序控制器140,并且驱动TFT DTr的阈值电压Vth的变化被补偿。结果,流经发光二极管E的电流保持恒定,从而使得OLED显示装置能够以均匀的亮度显示高质量的图像。
通过每个子像素SP中的三个TFT和一个电容(3T1C)使流经发光二极管E的电流水平保持恒定。在OLED显示装置中,随着驱动时间的增加,劣化加速且发光性能降低。由于发光二极管E的劣化速度在各子像素中不同,故可通过调整流经每个子像素的发光二极管的电流来保持OLED显示装置的显示质量。
参见图6,数据驱动器120使用时序控制器140的调制图像数据和多个数据控制信号来产生数据信号。数据驱动器120经由数据线DL提供数据信号至显示面板110。
尽管为示出,但数据驱动器120可包括产生与数据控制信号同步的顺序时钟信号的至少一个移位寄存器,按顺序地保持且同时输出与时钟信号同步的图像数据的锁存器,将数字类型的图像数据转换成模拟类型的数据信号的转换器,以及稳定并输出数据信号的输出缓冲器。
栅极驱动器130使用时序控制器140的多个栅极控制信号产生栅极信号,并经由栅极线GL将该栅极信号提供给显示面板110。栅极驱动器130可使用该多个栅极控制信号产生感测信号,并可经由感测线将该感测信号提供给显示面板110。栅极驱动器130可形成在板内选通(GIP,gate in panel)型的显示面板110的边缘部分上。
时序控制器140经由接口从诸如显卡(graphic card)的外部系统接收多个信号,如图像数据、垂直同步信号Vsync、水平同步信号Hsync和数据使能信号DE。此外,时序控制器140产生调制图像数据、多个数据控制信号和多个栅极控制信号。时序控制器140将调制图像数据和多个数据控制信号提供给数据驱动器120,并将多个栅极控制信号提供给栅极驱动器130。图像数据可包括红、绿和蓝色分量(components),且调制图像数据可包括红、绿、蓝和白色分量。
时序控制器140进一步包括判定图像数据的灰度级的灰度级判定部145。例如,灰度级判定部145可分析图像数据的灰度级,并可将图像数据分类为三组:低灰度级组、中灰度级组和高灰度级组。灰度级判定部145可分析单个帧的图像数据的红、绿和蓝色子像素的灰度级。灰度级是图像数据中从亮部到暗部逐渐变化的色度(shade)范围。例如,8位的图像数据可具有总共256级灰度级,即从第0级灰度级到第255级灰度级。此外,低灰度级组可在第0级灰度级到第96级灰度级范围内,中灰度级组可在第96级灰度级到第160级灰度级范围内,高灰度级组可在第160级灰度级到第255级灰度级内。
时序控制器140根据灰度级判定部145的判定结果确定红、绿、蓝和白色子像素的红、绿、蓝和白色分量的灰度级。而且,时序控制器140根据红、绿、蓝和白色分量的灰度级产生调制图像数据,并将该调制图像数据提供给数据驱动器120。
例如,当图像数据被灰度级判定部145分类到低灰度级组中时,时序控制器140可确定白色子像素的白色分量的灰度级为第0级灰度级,并可使用第0级灰度级的白色分量产生调制图像数据。
图8A到8C是示出根据第一示例性实施方式的驱动有机发光二极管显示装置的方法的视图。进一步,图9是示出通过根据第一示例性实施方式的有机发光二极管显示装置所显示的图像的图片。
如图8A所示,低灰度级组的白色图像通过除白色子像素之外的红、绿和蓝色子像素显示。例如,施加到白色子像素的数据信号的数据电压相对于参考值1可以确定为大约0,而施加到红、绿和蓝色子像素中每个的数据信号的数据电压相对于参考值1可以确定为大约1。结果,施加到红、绿、蓝和白色子像素的数据电压可具有大约1:1:1:0的比例。参考值可对应于施加到根据现有技术的OLED显示装置的红、绿、蓝和白色子像素的数据电压。
而且,当图像数据被灰度级判定部145分类到中灰度级组中时,时序控制器140可确定白色子像素的白色分量的灰度级为小于红、绿和蓝色子像素的红、绿和蓝色分量的灰度级的值,并可使用具有小于红、绿和蓝色分量的灰度级的白色分量产生调制图像数据。据此,如图8B中所示,中灰度级组的白色图像由红、绿、蓝和白色子像素显示,其中白色子像素的亮度小于红、绿和蓝色子像素中的每个的亮度。
例如,施加到白色子像素的数据信号的数据电压可相对于参考值1确定为大约0.5,而施加到红、绿和蓝色子像素中的每个的数据信号的数据电压可相对于参考值1确定为大约1.5。结果,施加到红、绿、蓝和白色子像素的数据电压可具有大约1.5:1.5:1.5:0.5的比例。
在根据现有技术的OLED显示装置中,对于低灰度级组和中灰度级组的图像数据而言,施加到红、绿、蓝和白色子像素的数据电压具有大约1:1:1:1的比例。在根据示例性实施方式的OLED显示装置中,对于低灰度级组的图像数据而言,施加到红、绿、蓝和白色子像素的数据电压具有大约1:1:1:0的比例,而对于中灰度级组的图像数据而言,施加到红、绿、蓝和白色子像素的数据电压具有大约1.5:1.5:1.5:0.5的比例。
当图像数据被灰度级判定部145分类到高灰度级组中时,时序控制器140可确定白色子像素的白色分量的灰度级为等于红、绿和蓝色子像素的红、绿和蓝色分量的灰度级的值,并可使用具有等于红、绿和蓝色分量的灰度级的白色分量产生调制图像数据。据此,如图8C中所示,高灰度级组的白色图像由红、绿、蓝和白色子像素显示,其中施加到白色子像素的数据电压等于施加到红、绿和蓝色子像素中的每个的数据电压。
在另一示例性实施方式中,灰度级判定部145可形成为时序控制器140外部的单独元件。
在根据第一示例性实施方式的OLED显示装置中,图像数据的白色分量的灰度级根据图像数据的灰度级组确定,并且施加到白色子像素的数据电压根据图像数据的灰度级组而具有不同的水平(level)。结果,流经发光二极管E的电流被调整且OLED显示装置显示具有改善的亮度均匀性的图像。
图9是示出由根据第一示例性实施方式的有机发光二极管显示装置所显示的图像的图片。
如图9中所示,低灰度级组的第一白色图像A1可由除白色子像素之外的红、绿和蓝色子像素来显示,以使得白色子像素的亮度为0,并因而例如施加到红、绿、蓝和白色子像素的数据电压可具有大约1:1:1:0的比例。
并且,中灰度级组的第二白色图像A2可由红、绿、蓝和白色子像素来显示,以使得白色子像素的亮度小于红、绿和蓝色子像素中的每个的亮度。因而,例如,施加到红、绿、蓝和白色子像素的数据电压可具有大约1.5:1.5:1.5:0.5的比例。而且,高灰度级组的第三白色图像A3可由红、绿、蓝和白色子像素来显示,以使得白色子像素的亮度等于红、绿和蓝色子像素中的每个的亮度。因而,例如,施加到红、绿、蓝和白色子像素的数据电压可具有大约1:1:1:1的比例。
在OLED显示装置中,由于施加到白色子像素的数据电压根据图像数据的灰度级组而被调整,所以白色的光学性质被改善,并且因而OLED显示装置显示具有改善的亮度均匀性的图像。
图10A到10C是示出根据第二示例性实施方式的驱动有机发光二极管显示装置的方法的视图。进一步地,图11是示出按照根据第二示例性实施方式的有机发光二极管显示装置的灰度级的亮度的曲线图。图12是示出按照根据第二示例性实施方式的有机发光二极管显示装置的灰度级的亮度比的曲线图。图13是示出按照根据第二示例性实施方式的有机发光二极管显示装置的灰度级的数据电压的曲线图。
第二示例性实施方式的OLED显示装置包括与图6的第一示例性实施方式的OLED显示装置相同的结构。据此,图像数据的灰度级由灰度级判定部来判定,且时序控制器根据图像数据的灰度级产生调制图像数据。时序控制器将调制图像数据提供给数据驱动器。
在根据第二实施方式的驱动OLED显示装置的方法中,通过红、绿、蓝和白色子像素来显示白色图像,且调整红、绿、蓝和白色子像素的亮度比。
在图10A至10C中,施加到红、绿、蓝和白色子像素的数据电压可根据数据电压比来确定,且红、绿、蓝和白色子像素的亮度可根据亮度比来确定。
施加到红、绿和蓝色子像素中的每个的数据电压比可定义如下:
DVRr=DVw/DVr,DVRg=DVw/DVg,DVRb=DVw/DVb
其中DVRr、DVRg和DVRb分别是红、绿和蓝色子像素的数据电压比,而DVr、DVg、DVb和DVw分别是红、绿、蓝和白色子像素的数据电压。
低、中和高灰度级组的数据电压比可确定如下:
DVRr(l)<DVRr(m)<DVRr(h),DVRg(l)<DVRg(m)<DVRg(h),
DVRb(l)<DVRb(m)<DVRb(h),
其中DVRr(l)、DVRr(m)和DVRr(h)分别是低、中和高灰度级组的红色子像素的数据电压比,DVRg(l)、DVRg(m)和DVRg(h)分别是低、中和高灰度级组的绿色子像素的数据电压比,而DVRb(l)、DVRb(m)和DVRb(h)分别是低、中和高灰度级组的蓝色子像素的数据电压比。
此外,白色子像素的亮度比可定义如下:
LRw=Lw/(Lr+Lg+Lb+Lw),
其中LRw是白色子像素的亮度比,而Lr、Lg、Lb和Lw分别是红、绿、蓝和白色子像素的亮度。
低、中和高灰度级组的亮度比可确定如下:
LRw(l)<LRw(m)<LRw(h),
其中LRw(l)、LRw(m)和LRw(h)分别是低、中和高灰度级组的白色子像素的亮度比。
在图10A中,当图像数据被灰度级判定部145分类到低灰度级组中时,时序控制器140可确定施加到白色子像素的数据信号的数据电压为小于参考值,并可确定施加到红、绿和蓝色子像素中的每个的数据电压为大于参考值,从而调整亮度比。参考值可对应于施加到根据现有技术的OLED显示装置的红、绿、蓝和白色子像素的数据电压。
例如,施加到白色子像素的数据信号的数据电压可相对于参考值1确定为大约0.5,而施加到红、绿和蓝色子像素中的每个的数据信号的数据电压可相对于参考值1确定为大约1.5。结果,施加到红、绿、蓝和白色子像素的数据电压可具有大约1.5:1.5:1.5:0.5的比例。
对于图11至13中的低灰度级组而言,由于向红、绿和蓝色子像素中的每个施加大于参考值的数据电压,故红、绿和蓝色子像素的亮度大于白色子像素的亮度。例如,如图12中所示,对于低灰度级组的第96级灰度级而言,红、绿和蓝色子像素的亮度比大于白色子像素的亮度比。对于低灰度级组,由于施加到红、绿和蓝色子像素的数据电压增加,故噪声的影响被最小化且亮度均匀性被改善。
在图10B中,当图像数据被灰度级判定部145分类到中灰度级组中时,时序控制器140可确定施加到白色子像素的数据信号的数据电压,以使得红、绿和蓝色子像素的亮度比与白色子像素的亮度比彼此成反比。
例如,随着灰度级的增加,施加到白色子像素的数据信号的数据电压可被确定为以第一斜率逐渐增加,且施加到红、绿和蓝色子像素中的每个的数据信号的数据电压可被确定为以小于第一斜率的第二斜率逐渐增加。
对于图11至13中的中灰度级组而言,由于向红、绿、蓝和白色子像素施加逐渐增加的数据电压,故获得了均匀的亮度。例如,如图12中所示,对于中灰度级组的第128级灰度级而言,红、绿和蓝色子像素的亮度比等于白色子像素的亮度比。对于中灰度级,由于施加到红、绿、蓝和白色子像素的数据电压逐渐增加,故亮度均匀性被改善。
在图10C中,当图像数据被灰度级判定部145分类到高灰度级组中时,时序控制器140可确定施加到白色子像素的数据信号的数据电压为等于施加到红、绿和蓝色子像素中的每个的数据电压的值。据此,高灰度级组的白色图像由红、绿、蓝和白色子像素显示,其中白色子像素的亮度大于红、绿和蓝色子像素中的每个的亮度。
对于图11至13中的高灰度级组而言,对于高灰度级组的第255级灰度级,白色子像素的亮度比为大约80%,而红、绿和蓝色子像素的亮度比为大约20%。
在根据第二示例性实施方式的OLED显示装置中,图像数据的红、绿、蓝和白色分量的灰度级根据图像数据的灰度级组而确定,且施加到红、绿、蓝和白色子像素的数据电压根据图像数据的灰度级组而具有不同的级。例如,与施加到现有技术的白色子像素的数据电压相比,可降低施加到白色子像素的数据电压,且与施加到根据现有技术的红、绿和蓝色子像素的数据电压相比,可增加施加到红、绿和蓝色子像素的数据电压。尽管对于图3的第96级灰度级,白色子像素的数据电压为大约6V,而红、绿和蓝色子像素中每个的数据电压为大约2V;但对于图13的第96级灰度级,白色子像素的数据电压为大约5V,而红、绿和蓝色子像素中每个的数据电压为大约3V。结果,噪声的影响被最小化且亮度均匀性被改善。进一步地,施加到白色子像素的数据电压和施加到红、绿和蓝色子像素的数据电压之间的差异被减小。
因此,在根据示例性实施方式的驱动OLED显示装置的方法中,通过根据图像数据的灰度级调整施加到白色子像素的数据电压,改善了亮度均匀性。具体而言,防止了在低灰度级组的图像中的不均匀亮度。此外,通过根据图像数据的灰度级调整施加到红、绿、蓝和白色子像素的数据电压,改善了亮度均匀性。具体而言,通过增大施加到低灰度级组的红、绿和蓝色子像素的数据电压,使得噪声的影响被最小化。由于流经发光二极管的电流因数据电压而被调整,从而获得了均匀的亮度分布。
在不脱离本发明的精神或范围的情况下,对本领域技术人员来说,对本发明的驱动OLED显示装置的方法进行各种修改和变型是显而易见的。因此,本发明旨在涵盖对本发明的各种修改和变型,只要它们落入所附权利要求书及其等同方式的范围内。
Claims (4)
1.一种驱动具有第一到第三子像素和白色子像素的有机发光二极管显示装置的方法,包括:
判定图像数据的灰度级;
将所述图像数据分类到低灰度级组、中灰度级组和高灰度级组中;
当所述图像数据的所述灰度级被分类到所述低灰度级组中时,使用除所述白色子像素之外的所述第一到第三子像素来显示图像;
当所述图像数据的所述灰度级被分类到所述中灰度级组和所述高灰度级组之一中时,使用所述第一到第三子像素和所述白色子像素来显示所述图像;和
当所述图像数据的所述灰度级被分类到所述中灰度级组中时,产生施加到所述白色子像素且小于参考值的数据电压,以及产生施加到所述第一到第三子像素且大于所述参考值的数据电压。
2.根据权利要求1所述的方法,其中施加到所述第一到第三子像素的所述数据电压和施加到所述白色子像素的所述数据电压具有1.5:1.5:1.5:0.5的比例。
3.一种驱动具有第一到第三子像素和白色子像素的有机发光二极管显示装置的方法,包括:
判定图像数据的灰度级;和
根据所述图像数据的所述灰度级,通过调整所述第一到第三子像素与所述白色子像素的亮度比来显示图像,
其中所述图像数据的所述灰度级被分类到低灰度级组、中灰度级组和高灰度级组中,
当所述图像数据的所述灰度级被分类到所述低灰度级组中时,产生施加到所述白色子像素且小于参考值的数据电压,以及产生施加到所述第一到第三子像素且大于所述参考值的数据电压。
4.根据权利要求3所述的方法,其中施加到所述第一到第三子像素的所述数据电压和施加到所述白色子像素的所述数据电压具有1.5:1.5:1.5:0.5的比例。
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US20190005903A1 (en) * | 2017-06-30 | 2019-01-03 | HKC Corporation Limited | Display device and driving method thereof |
CN109036290B (zh) * | 2018-09-04 | 2021-01-26 | 京东方科技集团股份有限公司 | 像素驱动电路、驱动方法及显示装置 |
JP2020144198A (ja) * | 2019-03-05 | 2020-09-10 | 株式会社ジャパンディスプレイ | 表示装置 |
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