CN105489165A - 像素补偿电路、方法、扫描驱动电路及平面显示装置 - Google Patents
像素补偿电路、方法、扫描驱动电路及平面显示装置 Download PDFInfo
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Abstract
本发明公开了一种像素补偿电路、方法、扫描驱动电路及平面显示装置。像素补偿电路包括驱动开关的第一控制端连参考电压端,第一及第二可控开关的控制端连第一及第二扫描线,第一端连第一电压端,第二端连驱动开关的第一端;第二可控开关的第一端连驱动开关的第二端;有机发光二极管的阳极连第二可控开关的第二端,阴极接地;第三及第四可控开关的控制端连第三扫描线,第一端连第一可控开关的第二端及驱动开关的第一端,第二端连驱动开关的第二控制端;驱动开关的第二控制端经存储电容接地;第四可控开关的第一端连驱动开关的第二端,第二端连接数据线,以避免阈值电压漂移造成有机发光二极管的电流不稳定,以此实现面板亮度显示均匀。
Description
技术领域
本发明涉及显示技术领域,特别是涉及一种像素补偿电路、方法、扫描驱动电路及平面显示装置。
背景技术
目前的有机发光二极管(OrganicLightEmittingdiode,OLED)显示器具有体积小、结构简单、自主发光、亮度高、可视角度大、响应时间短等优点,吸引了广泛的注意。
现有的有机发光二极管显示器中有一个晶体管作为驱动晶体管用于控制通过有机发光二极管OLED的电流,因此驱动晶体管的阈值电压的重要性便十分明显,所述阈值电压的正向或负向漂移都会使得在相同数据信号下有不同的电流通过有机发光二极管,目前的晶体管在使用过程中如氧化物半导体中的照光、源漏电极电压应力作用等因素,都可能导致阈值电压漂移,造成通过有机发光二极管的电流不稳定,进而引起面板亮度显示不均匀。
发明内容
本发明主要解决的技术问题是提供一种像素补偿电路、方法、扫描驱动电路及平面显示装置,以避免阈值电压漂移造成有机发光二极管的电流不稳定,以此实现面板亮度显示均匀。
为解决上述技术问题,本发明采用的一个技术方案是:提供一种像素补偿电路,包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
其中,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极。
其中,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种像素补偿方法,包括:
在预充电阶段,驱动开关、第一可控开关、第三可控开关及第四可控开关均导通,第二可控开关截止,所述驱动开关的第二控制端与所述驱动开关的第一端相连,由于所述第一可控开关导通,所述驱动开关的第二控制端的电压与所述驱动开关的第一端的电压相等且均为所述第一电压,所述驱动开关的第一控制端的电压等于参考电压,由于所述第四可控开关导通,所述驱动开关的第二端的电压等于第二电压;
在编程阶段,所述驱动开关、所述第三可控开关及所述第四可控开关均导通,所述第一可控开关及所述第二可控开关均截止,所述驱动开关的阈值电压非常小,随着所述驱动开关的第二控制端与所述驱动开关的第一端之间电压不断减小,所述驱动开关的阈值电压不断上升,直到所述驱动开关的第一控制端的电压与所述驱动开关的第二端的电压之间的差值等于所述驱动开关的阈值电压时,所述驱动开关的第二控制端的电压不再变化并存储在存储电容中;及
在驱动发光阶段,所述驱动开关、所述第一可控开关及所述第二可控开关均导通,所述第三可控开关及所述第四可控开关均截止,在编程阶段得到的所述驱动开关的第二控制端的电压由所述存储电容维持,以使得所述驱动开关的阈值电压等于所述参考电压与所述第二电压的差值,此时所述驱动开关的第一控制端的电压仍然为所述参考电压,所述驱动开关的第二端的电压为有机发光二极管上的电压。
其中,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极。
其中,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种扫描驱动电路,所述扫描驱动电路包括像素补偿电路,所述像素补偿电路包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
其中,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种平面显示装置,所述平面显示装置包括像素补偿电路,所述像素补偿电路包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
其中,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
本发明的有益效果是:区别于现有技术的情况,本发明的所述像素补偿电路及方法通过使用双栅极薄膜晶体管作为驱动晶体管,因为双栅极薄膜晶体管所受到电压与光照的应力影响较小,同时由于双栅极薄膜晶体管阈值电压与顶栅电压负相关特性,能够通过输入预设电压来指定驱动晶体管的阈值电压,无需通过调整数据信号的大小来减弱驱动晶体管的阈值电压漂移,因此也不会增加驱动管的应力影响,以此避免了所述驱动晶体管的阈值电压漂移造成所述有机发光二极管的电流不稳定,以此实现面板亮度显示均匀。
附图说明
图1是本发明的像素补偿电路的结构示意图;
图2是本发明的像素补偿电路的波形图;
图3是本发明的扫描驱动电路的示意图;
图4是本发明的平面显示装置的示意图。
具体实施方式
请参阅图1,是本发明的像素补偿电路的结构示意图。如图1所示,本发明的像素补偿电路包括驱动开关T0,所述驱动开关T0包括第一控制端BG、第二控制端TG、第一端D及第二端S,所述驱动开关T0的第一控制端BG连接一参考电压端VPRE,用于接收所述参考电压端VPRE输出的参考电压Vpre;
第一可控开关T1,所述第一可控开关T1包括控制端、第一端及第二端,所述第一可控开关T1的控制端连接一第一扫描线scan2,所述第一可控开关T1的第一端连接一第一电压端VDD1,用于接收所述第一电压端VDD1输出的第一电压VDD,所述第一可控开关T1的第二端连接所述驱动开关T0的第一端D;
第二可控开关T2,所述第二可控开关T2包括控制端、第一端及第二端,所述第二可控开关T2的控制端连接一第二扫描线scan3,所述第二可控开关T2的第一端连接所述驱动开关T0的第二端S;
有机发光二极管D1,所述有机发光二极管D1包括阳极及阴极,所述有机发光二极管D1的阳极连接所述第二可控开关T2的第二端,所述有机发光二极管D1的阴极接地;
第三可控开关T3,所述第三可控开关T3包括控制端、第一端及第二端,所述第三可控开关T3的控制端连接一第三扫描线scan1,所述第三可控开关T3的第一端连接所述第一可控开关T1的第二端及所述驱动开关T0的第一端D,所述第三可控开关T3的第二端S连接所述驱动开关T0的第二控制端TG;
存储电容C1,所述存储电容C1包括第一端及第二端,所述存储电容C1的第一端连接所述驱动开关T0的第二控制端TG及所述第三可控开关T3的第二端,所述存储电容C1的第二端接地;
第四可控开关T4,所述第四可控开关T4包括控制端、第一端及第二端,所述第四可控开关T4的控制端连接所述第三扫描线scan3,所述第四可控开关T4的第一端连接所述驱动开关T0的第二端S及所述第二可控开关T2的第一端,所述第四可控开关T4的第二端连接一数据线Data,用于接收所述数据线Data输出的第二电压VData。
在本实施例中,所述驱动开关T0为双栅极薄膜晶体管,所述驱动开关T0的第一控制端BG、第二控制端TG、第一端D及第二端S分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极。
在本实施例中,所述第一可控开关至所述第四可控开关T1-T4均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关T1-T4的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
请参阅图2,是本发明上述实施例的所述像素补偿电路的波形图。根据图1及图2获得所述像素补偿电路的工作原理如下(即所述像素补偿方法):在预充电阶段,驱动开关T0、第一可控开关T1、第三可控开关T3及第四可控开关T4均导通,第二可控开关T2截止,所述驱动开关T0的第二控制端TG与所述驱动开关T0的第一端D相连,由于所述第一可控开关T1导通,所述驱动开关T0的第二控制端TG的电压与所述驱动开关T0的第一端D的电压相等且均为所述第一电压VDD,即VTG=VD=VDD(公式1),所述驱动开关T0的第一控制端BG的电压等于参考电压Vpre,即VBG=Vpre(公式2),由于所述第四可控开关T4导通,所述驱动开关T0的第二端S的电压等于第二电压VData,即VS=VData(公式3),完成初始化过程;
在编程阶段,所述驱动开关T0、所述第三可控开关T3及所述第四可控开关T4均导通,所述第一可控开关T1及所述第二可控开关T2均截止,所述驱动开关T0的阈值电压Vth非常小,随着所述驱动开关T0的第二控制端TG与所述驱动开关T0的第一端D之间电压不断减小,所述驱动开关T0的阈值电压Vth不断上升,直到所述驱动开关T0的第一控制端BG的电压与所述驱动开关T0的第二端S的电压之间的差值等于所述驱动开关T0的阈值电压Vth时,即VBG-VS=Vth(公式4),所述驱动开关T0的第二控制端TG的电压不再变化并存储在存储电容C1中,此时所述驱动开关T0的阈值电压Vth=VBG-VS=Vpre-VData(公式5);
在驱动发光阶段,所述驱动开关T0、所述第一可控开关T1及所述第二可控开关T2均导通,所述第三可控开关T3及所述第四可控开关T4均截止,在编程阶段得到的所述驱动开关T0的第二控制端TG的电压由所述存储电容C1维持,以使得所述驱动开关T0的阈值电压Vth等于所述参考电压Vpre与所述第二电压VData的差值,即Vth=Vpre-VData(公式6),此时所述驱动开关T0的第一控制端BG的电压仍然为所述参考电压Vpre,所述驱动开关T0的第二端S的电压为有机发光二极管D1上的电压VOLED,根据晶体管电流公式及上述公式1至公式6得到:
I=β(VBG-Vth-Vs)2=β(Vpre-Vpre+VData-VOLED)2=β(VData-VOLED)2(公式7)由上述公式7可以看出,通过所述有机发光二极管D1的电流与所述驱动开关T0的阈值电压Vth无关,因此,所述像素补偿电路避免了所述驱动开关T0的阈值电压Vth漂移造成所述有机发光二极管D1的电流不稳定,以此实现面板亮度显示均匀。
请参阅图3,为本发明一种扫描驱动电路的示意图。所述扫描驱动电路中包括所述像素补偿电路,用于避免所述扫描驱动电路中的驱动晶体管发生阈值电压漂移,从而造成面板亮度显示不均匀。
请参阅图4,为本发明一种平面显示装置的示意图。所述平面显示装置例如可为OLED,其包括前述的扫描驱动电路及像素补偿电路,所述具有像素补偿电路的扫描驱动电路设置在所述平面显示装置的周边,例如设置在平面显示装置的两端。
所述像素补偿电路及方法通过使用双栅极薄膜晶体管作为驱动晶体管,因为双栅极薄膜晶体管所受到电压与光照的应力影响较小,同时由于双栅极薄膜晶体管阈值电压与顶栅电压负相关特性,能够通过输入预设电压来指定驱动晶体管的阈值电压,无需通过调整数据信号的大小来减弱驱动晶体管的阈值电压漂移,因此也不会增加驱动管的应力影响,以此避免了所述驱动晶体管的阈值电压漂移造成所述有机发光二极管的电流不稳定,以此实现面板亮度显示均匀。
以上所述仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明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,均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种像素补偿电路,其特征在于,所述像素补偿电路包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
2.根据权利要求1所述的像素补偿电路,其特征在于,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极。
3.根据权利要求1所述的像素补偿电路,其特征在于,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
4.一种像素补偿方法,其特征在于,所述像素补偿方法包括:
在预充电阶段,驱动开关、第一可控开关、第三可控开关及第四可控开关均导通,第二可控开关截止,所述驱动开关的第二控制端与所述驱动开关的第一端相连,由于所述第一可控开关导通,所述驱动开关的第二控制端的电压与所述驱动开关的第一端的电压相等且均为所述第一电压,所述驱动开关的第一控制端的电压等于参考电压,由于所述第四可控开关导通,所述驱动开关的第二端的电压等于第二电压;
在编程阶段,所述驱动开关、所述第三可控开关及所述第四可控开关均导通,所述第一可控开关及所述第二可控开关均截止,所述驱动开关的阈值电压非常小,随着所述驱动开关的第二控制端与所述驱动开关的第一端之间电压不断减小,所述驱动开关的阈值电压不断上升,直到所述驱动开关的第一控制端的电压与所述驱动开关的第二端的电压之间的差值等于所述驱动开关的阈值电压时,所述驱动开关的第二控制端的电压不再变化并存储在存储电容中;及
在驱动发光阶段,所述驱动开关、所述第一可控开关及所述第二可控开关均导通,所述第三可控开关及所述第四可控开关均截止,在编程阶段得到的所述驱动开关的第二控制端的电压由所述存储电容维持,以使得所述驱动开关的阈值电压等于所述参考电压与所述第二电压的差值,此时所述驱动开关的第一控制端的电压仍然为所述参考电压,所述驱动开关的第二端的电压为有机发光二极管上的电压。
5.根据权利要求4所述的像素补偿方法,其特征在于,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极。
6.根据权利要求4所述的像素补偿方法,其特征在于,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
7.一种扫描驱动电路,其特征在于,所述扫描驱动电路包括像素补偿电路,所述像素补偿电路包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
8.根据权利要求7所述的扫描驱动电路,其特征在于,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
9.一种平面显示装置,其特征在于,所述平面显示装置包括像素补偿电路,所述像素补偿电路包括:
驱动开关,所述驱动开关包括第一控制端、第二控制端、第一端及第二端,所述驱动开关的第一控制端连接一参考电压端,用于接收所述参考电压端输出的参考电压;
第一可控开关,所述第一可控开关包括控制端、第一端及第二端,所述第一可控开关的控制端连接一第一扫描线,所述第一可控开关的第一端连接一第一电压端,用于接收所述第一电压端输出的第一电压,所述第一可控开关的第二端连接所述驱动开关的第一端;
第二可控开关,所述第二可控开关包括控制端、第一端及第二端,所述第二可控开关的控制端连接一第二扫描线,所述第二可控开关的第一端连接所述驱动开关的第二端;
有机发光二极管,所述有机发光二极管包括阳极及阴极,所述有机发光二极管的阳极连接所述第二可控开关的第二端,所述有机发光二极管的阴极接地;
第三可控开关,所述第三可控开关包括控制端、第一端及第二端,所述第三可控开关的控制端连接一第三扫描线,所述第三可控开关的第一端连接所述第一可控开关的第二端及所述驱动开关的第一端,所述第三可控开关的第二端连接所述驱动开关的第二控制端;
存储电容,所述存储电容包括第一端及第二端,所述存储电容的第一端连接所述驱动开关的第二控制端及所述第三可控开关的第二端,所述存储电容的第二端接地;及
第四可控开关,所述第四可控开关包括控制端、第一端及第二端,所述第四可控开关的控制端连接所述第三扫描线,所述第四可控开关的第一端连接所述驱动开关的第二端及所述第二可控开关的第一端,所述第四可控开关的第二端连接一数据线,用于接收所述数据线输出的第二电压。
10.根据权利要求9所述的平面显示装置,其特征在于,所述驱动开关为双栅极薄膜晶体管,所述驱动开关的第一控制端、第二控制端、第一端及第二端分别对应所述双栅极薄膜晶体管的底栅、顶栅、漏极及源极,所述第一可控开关至所述第四可控开关均为NMOS型薄膜晶体管,所述第一可控开关至所述第四可控开关的控制端、第一端及第二端分别对应所述NMOS型薄膜晶体管的栅极、漏极及源极。
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