CN104091820B - 像素电路和显示装置 - Google Patents

像素电路和显示装置 Download PDF

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CN104091820B
CN104091820B CN201410328400.5A CN201410328400A CN104091820B CN 104091820 B CN104091820 B CN 104091820B CN 201410328400 A CN201410328400 A CN 201410328400A CN 104091820 B CN104091820 B CN 104091820B
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CN104091820A (zh
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杨盛际
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Beijing BOE Optoelectronics Technology Co Ltd
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Priority to PCT/CN2014/090620 priority patent/WO2016004713A1/zh
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3225Control 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
    • G09G3/3233Control 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 with pixel circuitry controlling the current through the light-emitting element
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/043Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • G09G2300/0465Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0842Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0842Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202Addressing of scan or signal lines
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0262The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
    • 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
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • G09G3/3275Details of drivers for data electrodes
    • G09G3/3291Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)

Abstract

本发明提供了一种像素电路,包括两个子像素电路,每个子像素电路包括:每个子像素电路包括:五个开关单元、驱动单元、储能单元和电致发光单元,第一子像素电路的第一开关单元、第二开关单元、第五开关单元与第二子像素电路的第一开关单元、第二开关单元、第五开关单元共用扫描信号线。本发明提供的像素电路中,流经电致发光单元器件的工作电流不受对应的驱动晶体管的阈值电压的影响,彻底解决了由于驱动晶体管的阈值电压漂移导致显示亮度不均的问题。同时本发明中,使用一个补偿电路来完成两个像素的驱动,相邻的两个像素共用多条信号线路,能够缩减显示装置中用于像素电路的信号线路数目,降低集成电路成本,并缩减像素间距,提高像素密度。

Description

像素电路和显示装置
技术领域
本发明涉及显示技术领域,尤其涉及一种像素电路和显示装置。
背景技术
有机发光显示器(OLED)是当今平板显示器研究领域的热点之一,与液晶显示器相比,OLED具有低能耗、生产成本低、自发光、宽视角及响应速度快等优点。目前,在手机、PDA、数码相机等显示领域OLED已经开始取代传统的液晶(LCD)显示屏。像素驱动电路设计是OLED显示器核心技术内容,具有重要的研究意义。
与TFT(薄膜场效应晶体管)-LCD利用稳定的电压控制亮度不同,OLED属于电流驱动,需要稳定的电流来控制发光。
由于工艺制程和器件老化等原因,在原始的2T1C驱动电路(包括两个薄膜场效应晶体管和一个电容)中,各像素点的驱动TFT的阈值电压存在不均匀性,这样就导致了流过每个像素点OLED的电流发生变化使得显示亮度不均,从而影响整个图像的显示效果。
并且现有技术中,一个像素电路一般对应于一个像素,每个像素电路都至少包含一条数据电压线、一条工作电压线和多条扫描信号线,这样就导致相应的制作工艺较为复杂,并且不利于缩小像素间距。
发明内容
本发明的目的是解决显示装置显示亮度不均的问题,并缩减显示装置中用于像素电路的信号线路数目,降低集成电路成本,同时提高显示装置的像素密度。
为了实现上述目的,本发明提供了一种像素电路,包括两个子像素电路;
每个子像素电路包括:第一开关单元、第二开关单元、第三开关单元、第四开关单元、第五开关单元、驱动单元、储能单元和电致发光单元;并且,
第一开关单元、第五开关单元的控制端连接到第一扫描信号线;第一开关单元的第一端连接到工作电压线,第二端连接到驱动单元的输入端;第五开关单元的第一端连接到驱动单元的输出端,第二端与电致发光单元相连;
第二开关单元的第一端连接到驱动单元的输入端,第二端连接到储能单元的第一端;
第三开关单元的第一端连接到驱动单元的输出端,第二端连接到数据电压线;
第四开关单元的控制端接入到第二扫描信号线,第一端连接到驱动单元的控制端,第二端接地;
储能单元的第二端连接到工作电压线;
其中,第一子像素电路的第二开关单元和第三开关单元的控制端均接入第二扫描信号线;第二子像素电路的第二开关单元和第三开关单元的控制端均接入第四扫描信号线。
优选的,所述开关单元和所述驱动单元为薄膜场效应晶体管,各个开关单元的控制端为栅极,第一端为源极,第二端为漏极,所述驱动单元的输入端为源极,控制端为栅极,输出端为漏极。
优选的,各个薄膜场效应晶体管均为P沟道型。
优选的,所述储能单元为电容。
优选的,所述电致发光单元为有机发光二极管。
本发明还提供了一种显示装置,包括上述任一项所述的像素电路。
优选的,所述像素电路的两个子像素电路分别位于两个相邻像素内。
优选的,所述两个相邻像素分别位于所述数据电压线的两侧。
优选的,所述两个相邻像素位于所述数据电压线的同一侧。
本发明提供的像素电路中,流经电致发光单元的工作电流不受对应的驱动晶体管的阈值电压的影响,彻底解决了由于驱动晶体管的阈值电压漂移导致显示亮度不均的问题。同时本发明中,使用一个补偿电路来完成两个像素的驱动,相邻的两个像素共用多条信号线路,能够缩减显示装置中用于像素电路的信号线路数目,降低集成电路成本,并缩减像素间距,提高像素密度。
附图说明
图1为本发明实施例提供的像素电路的结构示意图;
图2为本发明实施例提供的像素电路中关键信号的时序图;
图3为本发明实施例中的像素电路在不同时序下的电流流向和电压值的示意图;
图4为本发明实施例提供的显示装置中像素电路与像素的一种位置关系的示意图;
图5为本发明实施例提供的显示装置中像素电路与像素的一种位置关系的示意图。
具体实施方式
下面结合附图和实施例,对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
本发明实施例提供了一种像素电路,如图1或图3所示,包括:两个子像素电路P1和P2,这里的每个子像素电路对应于一个像素;每个像素子电路包括:五个开关单元T1、T2、T3、T4、T5,一个驱动单元DT,一个储能单元C,一个电致发光单元L(为了便于区分,在图1或图3中,P2中的五个开关单元分别表示为T1’、T2’、T3’、T4’、T5’,驱动单元表示为DT’,储能单元为C’,电致发光单元为L’,下同),
T1和T5的控制端均连接到第一扫描信号线Em;T1的第一端连接到工作电压线Vdd,第二端连接到DT的输入端;T5的第一端连接到DT的输出端,第二端与电致发光单元L相连;
T2的第一端连接到DT的输入端,第二端连接到C的第一端a1端(对于C’,其第一端为图中所示的a2端,第二端为图中所示的b2端);
T3的第一端连接到DT的输出端,第二端连接到数据电压线Vdata
T4的控制端接入到第二扫描信号线Scan[2],第一端连接到DT的控制端,第二端接地;
储能单元C的第一端a1端还与DT的控制端相连,第二端b1连接到工作电压线Vdd
并且,第一子像素电路P1的T2和T3的控制端均连接到第三扫描信号线Scan[1],第二子像素电路P2的T2’和T3’的控制端均连接到第四扫描信号线Scan[3]。
可以理解的是,本发明中,控制端连接到同一扫描信号线的多个开关单元(比如连接到Em的四个开关单元T1、T1’、T5、T5’,连接到Scan[1]的两个开关单元T2、T3,连接到Scan[3]的两个开关单元T2’和T3’)应为同一沟道类型的开关,即同为高电平导通或者同为低电平导通,从而保证连接到同一扫描信号线的两个开关单元的导通或关断状态相同。
本发明提供的像素电路中,流经电致发光单元的工作电流不受对应的驱动晶体管的阈值电压的影响,彻底解决了由于驱动晶体管的阈值电压漂移导致显示亮度不均的问题。同时本发明中,使用一个补偿电路来完成两个像素的驱动,压缩了补偿的TFT器件的个数,并减少了一个数据电压线,从而减少了信号线路的数目,这样可大幅缩减像素间距大小并降低IC成本,从而获得更高的像素密度。
优选的,所述开关单元和驱动单元为薄膜场效应晶体管TFT,各个开关单元的控制端为栅极,第一端为源极,第二端为漏极,所述驱动单元的输入端为源极,控制端为栅极,输出端为漏极。当然开关单元和驱动单元也可以为其他合适的器件或器件组合。
进一步的,本发明实施例中,所有各个薄膜场效应晶体管均为P沟道型。使用同一类型的晶体管,能够实现工艺流程的统一,从而提高产品的良品率。本领域技术人员可以理解的是,在实际应用中,各个晶体管的类型也可以不完全相同,比如T1和T5可以为N沟道型晶体管,而T2和T3可以为P沟道型晶体管,只要能够使控制端连接到同一扫描信号线的两个开关单元的导通/关断状态相同,即可实现本申请提供的技术方案,本发明优选的实施方式不应理解为对本发明保护范围的限定。
优选的,所述储能单元C为电容。当然实际应用中,根据设计需要也可以采用其他具有储能功能的元件。
优选的,所述电致发光单元L可以为有机发光二极管(OLED)。当然实际应用中,根据设计需要也可以采用其他具有电致发光功能的元件。
下面结合图2和图3对本发明优选的实施例提供的像素电路的工作原理进行详细说明,如图2所示为本发明提供的像素电路工作时输入到各个扫描信号线中的扫描信号的时序图,可分为四个阶段,在图2中分别表示为重置阶段W1、第一放电阶段W2、第二放电阶段W3,发光阶段W4,在各个阶段,像素电路的电流流向和电压值分别如图3a、图3b、图3c、图3d所示。为了方便说明,假设各个开关单元均为P沟道型TFT。
在重置阶段W1,如图2所示,Scan[2]为低电平,其他扫描信号线为高电平,此时如图3a所示,T4和T4’导通,其他TFT均断开,电容C1的a1点与电容C2的a2点同时接地,两点电势为0V。
在第一放电阶段W2,如图2所示,Scan[1]为低电平,其他扫描信号线为高电平,Vdata=V1,V1为电致发光单元L所对应的电压,此时T2和T3导通,其他TFT均断开,其电流流向如图3b中的Lb所示,放电结束后,a1点电势为V1-Vth1,b1点电势为Vdd,其中Vth1和Vth2分别为DT和DT’的阈值电压。
在第二放电阶段W3,如图2所示,Scan[3]为低电平,其他扫描信号线为高电平,Vdata=V2,V2为电致发光单元L’所对应的电压,此时T2’和T3’导通,其他TFT均断开,其电流流向如图3c中的Lc所示,放电结束后,a2点电势为V2-Vth2,b2点电势为Vdd
在发光阶段W4,如图2所示,扫描信号线中,Em为低电平,其他扫描信号线为高电平,此时T1、T1’、T5、T5’,DT,DT’导通,其他TFT关断,Vdd沿图3d中的Ld对L和L’供应电流,使L和L’发光。
根据饱和电流公式可知,此时流经L的电流IL=K(VGS-Vth1)2=[Vdd–(V1–Vth1)–Vth1)]2=K*(Vdd–V1)2
同理,IL’=K*(Vdd–V2)2
由上式中可以看到此时流经两个电致发光单元的工作电流不受驱动晶体管阈值电压的影响,只与此时的数据电压Vdata有关。彻底解决了驱动TFT由于工艺制程及长时间的操作造成阈值电压(Vth)漂移的问题,消除其对流经电致发光单元的电流的影响,保证电致发光单元的正常工作。同时本发明实施例中,两个像素共用同一条数据电压线、工作电压线、并仅使用三个扫描信号线,大大缩减了相应的信号线路的数目,降低集成电路成本,并缩减像素间距,提高像素密度。
基于相同的构思,本发明还提供了一种显示装置,包括上述任一项所示的像素电路。
优选的,该显示装置中,像素电路的两个子像素电路分别位于两个相邻像素内。这样能够使得元器件在相应的基板上的分布更加均匀。
优选的,所述两个相邻像素位于其数据电压线的同一侧,图4示出了其中一个像素电路PU对应的两个相邻像素在其对应数据电压线Vdata一侧的情况;或者,所述两个相邻像素分别位于其数据电压线的两侧,图5示出了其中一个所述像素电路PU对应的两个相邻像素在其对应数据电压线Vdata两侧的情况。
显示装置可以为:电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (9)

1.一种像素电路,其特征在于,包括两个子像素电路;
每个子像素电路包括:第一开关单元、第二开关单元、第三开关单元、第四开关单元、第五开关单元、驱动单元、储能单元和电致发光单元;并且,
第一开关单元、第五开关单元的控制端连接到第一扫描信号线;第一开关单元的第一端连接到工作电压线,第二端连接到驱动单元的输入端;第五开关单元的第一端连接到驱动单元的输出端,第二端与电致发光单元相连;
第二开关单元的第一端连接到驱动单元的输入端,第二端连接到储能单元的第一端;
第三开关单元的第一端连接到驱动单元的输出端,第二端连接到数据电压线;
第四开关单元的控制端接入到第二扫描信号线,第一端连接到驱动单元的控制端,第二端接地;
储能单元的第一端还与驱动单元的控制端相连,第二端连接到工作电压线;
其中,第一子像素电路的第二开关单元和第三开关单元的控制端均接入第三扫描信号线;第二子像素电路的第二开关单元和第三开关单元的控制端均接入第四扫描信号线;
连接到同一扫描线的第二开关单元和第三开关单元为同一沟道类型;连接到同一扫描线的第一开关单元和第五开关单元为同一沟道类型。
2.如权利要求1所述的像素电路,其特征在于,所述开关单元和所述驱动单元为薄膜场效应晶体管,各个开关单元的控制端为栅极,第一端为源极,第二端为漏极,所述驱动单元的输入端为源极,控制端为栅极,输出端为漏极。
3.如权利要求2所述的像素电路,其特征在于,各个薄膜场效应晶体管均为P沟道型。
4.如权利要求1所述的像素电路,其特征在于,所述储能单元为电容。
5.如权利要求1-4其中任一项所述的像素电路,其特征在于,所述电致发光单元为有机发光二极管。
6.一种显示装置,其特征在于,包括如权利要求1-5任一项所述的像素电路。
7.如权利要求6所述的显示装置,其他特征在于,所述像素电路的两个子像素电路分别位于两个相邻像素内。
8.如权利要求7所述的显示装置,其特征在于,所述两个相邻像素分别位于所述数据电压线的两侧。
9.如权利要求7所述的显示装置,其特征在于,所述两个相邻像素位于所述数据电压线的同一侧。
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