CN109637446A - 显示面板及其驱动装置 - Google Patents
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Abstract
本发明提出一种显示面板及其驱动装置,所述驱动装置,包括时序控制器和源驱动器,时序控制器,包括:第一接口;与第一接口相连的第一发送器和第一接收器;控制第一发送器和第一接收器的第一数据选择器;源驱动器,包括:与第一接口相连的第二接口;与第二接口相连的第二发送器和第二接收器;控制第二发送器和第二接收器的第二数据选择器,其中,第一数据选择器和第二数据选择器,用于在第一阶段,控制第一发送器和第二接收器通信,并且在第二阶段,控制第二发送器和第一接收器通信。本发明的显示面板的驱动装置,能够简化设计、提高系统集成度、提升系统稳定性、降低成本。
Description
技术领域
本发明涉及显示技术领域,尤其涉及一种显示面板的驱动装置和一种具有该驱动装置的显示面板。
背景技术
有源矩阵有机发光显示器包括能够自身发光的OLED(Organic Light-EmittingDiode,有机发光二极管),每个像素都由驱动TFT(Thin Film Transistor,薄膜场效应晶体管)来控制流入OLED中的驱动电流,进而控制OLED的发光亮度,在实践中,像素中驱动TFT电特性由于工艺条件、驱动环境等而不一致,因为这些原因,在像素中相同数据电压引起的驱动电流是不同的,所以在像素之间产生了亮度偏差。外部补偿技术通过感测每个像素中的驱动TFT特性参数,并且基于感测结果正确的校正输入数据,从而减少亮度的非一特性。
现阶段,用于提取驱动TFT的阈值电压Vth变化的感测方法为检测驱动TFT的源极电压Vs作为感测电压Vsen,并且基于感测电压Vsen检测驱动TFT的阈值电压Vth的变化;用于提取驱动TFT的迁移率的方法为给驱动TFT栅极一个驱动电压,根据SL(Sense Line)感测线上的充电电压确定迁移率的大小,阈值电压Vth在OLED发光过程中会发生漂移,阈值电压Vth的漂移会造成SL感测线的充电电压的迁移率发生偏差,因此需要实时侦测阈值电压Vth的装置和方法来使补偿正确,但是在使用现有技术中的驱动装置实时补偿过程中,时序控制器TCON通过P2P(Peer-to-Peer,对等网络)传输协议将显示数据传输给源驱动器SourceDriver IC,源驱动器Source Driver IC通过MLVDS(Multi-Point Low VoltageDifferential Signal,多点低压差分信号)传输协议将感测数据回传给时序控制器TCON。
但是,这样的驱动装置设计复杂、系统集成度低、稳定性也不好、成本较高。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此,本发明的第一个目的在于提出一种显示面板的驱动装置,其能够简化设计、提高系统集成度、提升系统稳定性、降低成本。
本发明的第二个目的在于提出一种显示面板。
为达上述目的,本发明第一方面实施例提出了一种显示面板的驱动装置,包括时序控制器和源驱动器,所述时序控制器,包括:第一接口;与所述第一接口相连的第一发送器和第一接收器;控制所述第一发送器和第一接收器的第一数据选择器;所述源驱动器,包括:与所述第一接口相连的第二接口;与所述第二接口相连的第二发送器和第二接收器;控制所述第二发送器和第二接收器的第二数据选择器,其中,所述第一数据选择器和第二数据选择器,用于在第一阶段,控制所述第一发送器和所述第二接收器通信,并且在第二阶段,控制所述第二发送器和所述第一接收器通信。
根据本发明实施例提出的显示面板的驱动装置,通过在时序控制器和源驱动器内分别对应增加第一数据选择器和第二数据选择器,以便在第一阶段,第一数据选择器和第二数据选择器控制第一发送器和第二接收器通信,并且在第二阶段,第一数据选择器和第二数据选择器控制第二发送器和第一接收器通信。由此,本发明实施例的驱动装置,能够简化设计、提高系统集成度、提升系统稳定性、降低成本。
另外,根据本发明上述实施例提出的显示面板的驱动装置还可以具有如下附加的技术特征:
根据本发明的一个实施例,所述第一阶段中所述时序控制器向所述源驱动器发送控制数据,所述第二阶段中所述源驱动器向所述时序控制器发送感测数据。
根据本发明的一个实施例,所述第一接口和所述第二接口为点对点P2P接口。
根据本发明的一个实施例,所述源驱动器,还包括:感测器,用于感测感测线上的感测电压值;与所述感测器相连的模数转换器,用于将所述感测电压值转换为感测电压数字值;以及连接在所述第二发送器和所述模数转换器之间的编码器,用于对所述感测电压数字值进行编码。
根据本发明的一个实施例,所述控制数据包括视频数据、控制信号和时钟恢复信号,其中,所述第二接收器,用于从所述控制数据中提取所述视频数据、控制信号和时钟恢复信号。
根据本发明的一个实施例,所述源驱动器,还包括:与所述第二接收器相连的数据时钟恢复器,用于根据所述时钟恢复信号进行时钟恢复。
进一步地,所述源驱动器,还包括:与所述第二接收器相连的锁存器,用于根据所述视频数据对显示面板进行驱动。
进一步地,所述源驱动器,还包括:与所述第二接收器相连的数模转换器,用于将所述控制信号转换为模拟控制信号;与所述数模转换器相连的放大器,用于对所述模拟控制信号进行放大。
根据本发明的一个实施例,所述显示面板具有有机发光二极管OLED。
为达上述目的,本发明第二方面实施例提出了一种显示面板,其包括上述的驱动装置。
本发明实施例提出的显示面板,通过上述的驱动装置,简化了设计、提高了系统集成度、提升了系统稳定性、降低了成本。
本发明附加的方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。
附图说明
本发明上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解,其中:
图1是相关技术中OLED基本像素补偿电路的电路图;
图2是相关技术中显示区与非显示区的示意图;
图3是相关技术中显示数据以及感测数据传输结构图;
图4是根据本发明实施例的显示面板的驱动装置的结构图;
图5是根据本发明一个实施例的P2P传输的时序图;以及
图6是根据本发明一个实施例的源驱动器Source Driver IC的内部结构图。
具体实施方式
下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,旨在用于解释本发明,而不能理解为对本发明的限制。
下面参考附图描述本发明实施例的显示面板的驱动装置和具有驱动装置的显示面板。
相关技术中,OLED显示装置主要包括显示面板、时序控制器、源极驱动器和栅极驱动器。其中,时序控制器接收外部输入的RGB数据、时序控制信号TC(Timing Control),同时接收源极驱动器输出的数据AData,并经过计算、转换、补偿等算法,在OLED显示装置运行阶段,时序控制器产生的数据Data和源极控制信号SCS(Source Control Signal)输出给源极驱动器,时序控制器产生的栅极控制信号GCS(Gate Control Signal)输出给栅极驱动器。
源极驱动器接收到数据Data和源极控制信号SCS后会产生相应的data电压,并通过DL(Data Line)数据线输出给显示面板;栅极驱动器接收到栅极控制信号GCS后会产生相应的Gate信号,并通过GL(Gate line)扫描线输出给显示面板。通过源极驱动器和栅极驱动器的控制,源极驱动器通过SL感测线感测出像素的光学/电学特征值,通过源极驱动器产生相应的Sense data(AData)输出给时序控制器。
如图1所示,显示面板由多个像素组成,以3T1C外部补偿像素为例进行说明:每个像素至少包含一条数据线DL、一条感测线SL、两条扫描线GL1和GL2、一个有机发光二极管器件OLED、一个存储电容Cst、一个驱动开关TFT T1,一个SCAN TFT T2和一个Sense TFT T3。
具体地,打开SCAN TFT T2与Sense TFT T3,给DL数据线一个固定的电压Vdata,给SL感测线一个复位电压Vref,若TFT T1的Vdata>Vref,此时TFT T1产生电流,并给电容Csense充电(如,按照固定时间充电);关闭SCAN TFT T2与Sense TFT T3,打开开关管SW,用模数转换器ADC采样电容Csense上的电压并转换为数字二进制值,其中,当Driving TFT T1的I-V特性(伏安特性)不一样时,电容Csense上的电压也不一样,此时可以通过Csense的电压值来反应TFT T1的I-V(伏安)特性,Driving TF T1的I-V特性差异主要体现在阈值电压Vth与迁移率μ上。其中,i=μ(Vdata-Vth-Vref)2。
如图2所示,在显示区(显示时间),TCON时序控制器通过高速串行的P2P接口传输视频信号至源驱动器Source Driver IC,在非显示区(Blank区,即Blank时间)进行实时补偿操作,并将感测数据回传给TCON。
具体地,如图3所示,在显示区,视频数据通过TCON高速串口P2P传输到SourceDriver IC,然后Source Driver IC进行CDR(Clock and Data Recovery,时钟数据恢复)和视频数据恢复,得到二进制视频数据,然后进行数模转换器DAC转换为模拟电压值,经过放大(AMP)后去驱动显示面板Panel。在Blank区,Source Driver IC感测Panel TFT状况,采样(SMP)感测线SL上的电压值,将模拟电压值经过模数转换器ADC转换为二进制数字电压值,然后编码(Coder)并通过MLVDS传输协议将数据回传给TCON。
需要说明的是,现有技术中的显示面板的驱动装置,在时序控制器TCON向源驱动器Source Driver IC传输视频数据时需要传输将大量的视频数据,即将显示数据传到显示面板Panel时需要传输将大量的视频数据,故采用P2P传输协议,而在源驱动器SourceDriver IC向时序控制器TCON回传感测数据时需要传输的数据量较少,故使用MLVDS传输协议。但是,这样的驱动装置由于使用两种传输协议,会使得系统集成度较低、设计较为复杂、系统的稳定性不好、成本较高。
为此,本发明提出了一种显示面板的驱动装置,该装置简化了设计、提高系统集成度、提升稳定性、降低成本。
图4是根据本发明实施例的显示面板的驱动装置的方框示意图。
在本发明的实施例中,显示面板具有有机发光二极管OLED,该有机发光二极管OLED能够自身发光,并且具有响应时间快、发光效率高、亮度高、宽视角等优点。
如图4所示,本发明实施例的显示面板的驱动装置,包括:时序控制器TCON和源驱动器Source Driver IC。
其中,时序控制器TCON,包括:第一接口10;与第一接口10相连的第一发送器TX1和第一接收器RX1;控制第一发送器TX1和第一接收器RX1的第一数据选择器MUX1。源驱动器Source Driver IC,包括:与第一接口10相连的第二接口20;与第二接口20相连的第二发送器TX2和第二接收器RX2;控制第二发送器TX2和第二接收器RX2的第二数据选择器MUX2,其中,第一数据选择器MUX1和第二数据选择器MUX2,用于在第一阶段,控制第一发送器TX1和第二接收器RX2通信,并且在第二阶段,控制第二发送器TX2和第一接收器RX1通信。
具体地,本发明实施例的显示面板的驱动装置,通过去掉时序控制器TCON和源驱动器Source Driver IC之间的一条传输线,分别在时序控制器TCON和源驱动器SourceDriver IC内部增加一个数据选择器MUX来选择不同阶段,以便第一数据选择器MUX1和第二数据选择器MUX2在不同阶段,控制时序控制器TCON和源驱动器Source Driver IC之间的数据传输。例如,在第一阶段(显示区)中,第一数据选择器MUX1和第二数据选择器MUX2控制第一发送器TX1和第二接收器RX2通信,以便时序控制器TCON向源驱动器Source Driver IC发送控制数据(包括视频数据、控制信号和时钟恢复信号);在第二阶段(非显示区)中,第一数据选择器MUX1和第二数据选择器MUX2控制第二发送器TX2和第一接收器RX1通信,以便源驱动器Source Driver IC向时序控制器TCON发送感测数据。从而简化了设计,提高了系统集成度,提高了稳定度、降低了成本。
在本发明的一个实施例中,第一接口10和第二接口20为点对点P2P接口,P2P接口传输时序如图5所示,其中CT指Clock Training,用于恢复源驱动器Source Driver IC的时钟信号,CTR用于传输控制信号,Video Data指视频数据,ADC Data指感测数据,其中,第一阶段(显示区)与第二阶段(非显示区)传输的数据时不同的,如第一阶段传输的是视频数据Video Data,第二阶段传输的是感测数据ADC Data,通过采用P2P协议取代MLVDS协议传输感测数据,能够使得感测数据传输干扰减少、传输速度更快、传输更安全。
由此,本发明实施例的显示面板的驱动装置,设计去掉了MLVDS传输线,简化了设计、提高了系统集成度、稳定度更高、降低了成本,通过采用P2P取代MLVDS传输感测数据,使得感测数据传输干扰减少、传输速度更快、传输更安全。
下面结合图6对源驱动器Source Driver IC的结构进行说明。
如图6所示,源驱动器Source Driver IC,还包括:感测器SMP、模数转换器ADC和编码器Coder。其中,感测器SMP用于感测感测线上的感测电压值,模数转换器ADC与感测器SMP相连,模数转换器ADC用于将感测电压值转换为感测电压数字值,编码器Coder连接在第二发送器TX2和模数转换器ADC之间,编码器Coder用于对感测电压数字值进行编码。
如图6所示,源驱动器Source Driver IC,还包括:数据时钟恢复器CDR,数据时钟恢复器CDR与第二接收器RX2相连,数据时钟恢复器CDR用于根据时钟恢复信号进行时钟恢复。
如图6所示,源驱动器Source Driver IC,还包括:锁存器LATCH,锁存器LATCH与第二接收器RX2相连,锁存器LATCH用于根据视频数据对显示面板Panel进行驱动。
如图6所示,源驱动器Source Driver IC,还包括:数模转换器DAC和放大器AMP,其中,数模转换器DAC与第二接收器RX2相连,数模转换器DAC用于将控制信号转换为模拟控制信号,放大器AMP与数模转换器DAC相连,放大器AMP用于对模拟控制信号进行放大。
具体地,第一阶段内,第二接收器RX2在接收到时序控制器TCON通过P2P接口传输的控制数据后,从控制数据中解出视频数据、控制信号和时钟恢复信号,其中,视频数据用于显示面板Panel显示用,控制信号用于控制显示面板Panel显示和MUX2控制器、第二数据选择器MUX2、第二发送器Tx2和第二接收器Rx2,数据时钟恢复器CDR和内部的振荡器OSC形成CMT(Clock Management Title,时钟管理单元),时钟管理单元CMT给感测器SMP、模数转换器ADC和编码器Coder提供所需的时钟源。
在第一阶段,时序控制器TCON将控制数据通过高速串口P2P传输到源驱动器Source Driver IC,源驱动器Source Driver IC的数据时钟恢复器CDR根据时钟恢复信号进行时钟恢复,以得到二进制视频数据。锁存器LATCH将视频数据进行缓存,数模转换器DAC根据控制信号对存储在锁存器LATCH中的视频数据进行数模转换,以转换为模拟视频数据,并输出至放大器AMP,放大器AMP对模拟视频信号进行放大,输出至显示面板Panel,以驱动显示面板Panel。
在第二阶段,源驱动器Source Driver IC的感测器SMP感测显示面板Panel TFT状况,并采样感测线上的感测电压值,通过模数转换器ADC将感测电压值转换为感测电压数字值(二进制数字值),通过编码器Coder对感测电压数字值进行编码以输出感测数据,并经过P2P传输给时序控制器TCON。
需要说明的是,源驱动器Source Driver IC将感测数据回传给时序控制器TCON后,时序控制器TCON根据感测数据根据算法补偿有机发光二极管OLED的阈值电压与迁移率。
综上所述,根据本发明实施例提出的显示面板的驱动装置,通过在时序控制器和源驱动器内分别对应增加第一数据选择器和第二数据选择器,以便在第一阶段,第一数据选择器和第二数据选择器控制第一发送器和第二接收器通信,并且在第二阶段,第一数据选择器和第二数据选择器控制第二发送器和第一接收器通信。由此,本发明实施例的驱动装置,能够简化设计、提高系统集成度、提升系统稳定性、降低成本。
基于上述实施例,本发明还提出一种显示面板,包括前述实施例的显示面板的驱动装置。
本发明实施例提出的显示面板,通过上述的驱动装置,简化了设计、提高了系统集成度、提升了系统稳定性、降低了成本。
在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外,在不相互矛盾的情况下,本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中,“多个”的含义是至少两个,例如两个,三个等,除非另有明确具体的限定。
流程图中或在此以其他方式描述的任何过程或方法描述可以被理解为,表示包括一个或更多个用于实现定制逻辑功能或过程的步骤的可执行指令的代码的模块、片段或部分,并且本发明的优选实施方式的范围包括另外的实现,其中可以不按所示出或讨论的顺序,包括根据所涉及的功能按基本同时的方式或按相反的顺序,来执行功能,这应被本发明的实施例所属技术领域的技术人员所理解。
本技术领域的普通技术人员可以理解实现上述实施例方法携带的全部或部分步骤是可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,该程序在执行时,包括方法实施例的步骤之一或其组合。
此外,在本发明各个实施例中的各功能单元可以集成在一个处理模块中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时,也可以存储在一个计算机可读取存储介质中。
上述提到的存储介质可以是只读存储器,磁盘或光盘等。尽管上面已经示出和描述了本发明的实施例,可以理解的是,上述实施例是示例性的,不能理解为对本发明的限制,本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。
Claims (10)
1.一种显示面板的驱动装置,其特征在于,包括时序控制器和源驱动器,
所述时序控制器,包括:
第一接口;
与所述第一接口相连的第一发送器和第一接收器;
控制所述第一发送器和第一接收器的第一数据选择器;
所述源驱动器,包括:
与所述第一接口相连的第二接口;
与所述第二接口相连的第二发送器和第二接收器;
控制所述第二发送器和第二接收器的第二数据选择器,其中,
所述第一数据选择器和第二数据选择器,用于在第一阶段,控制所述第一发送器和所述第二接收器通信,并且在第二阶段,控制所述第二发送器和所述第一接收器通信。
2.如权利要求1所述的显示面板的驱动装置,其特征在于,所述第一阶段中所述时序控制器向所述源驱动器发送控制数据,所述第二阶段中所述源驱动器向所述时序控制器发送感测数据。
3.如权利要求1所述的有机发光二极管的驱动装置,其特征在于,所述第一接口和所述第二接口为点对点P2P接口。
4.如权利要求1所述的显示面板的驱动装置,其特征在于,所述源驱动器,还包括:
感测器,用于感测感测线上的感测电压值;
与所述感测器相连的模数转换器,用于将所述感测电压值转换为感测电压数字值;以及
连接在所述第二发送器和所述模数转换器之间的编码器,用于对所述感测电压数字值进行编码。
5.如权利要求2所述的显示面板的驱动装置,其特征在于,所述控制数据包括视频数据、控制信号和时钟恢复信号,其中,所述第二接收器,用于从所述控制数据中提取所述视频数据、控制信号和时钟恢复信号。
6.如权利要求5所述的显示面板的驱动装置,其特征在于,所述源驱动器,还包括:
与所述第二接收器相连的数据时钟恢复器,用于根据所述时钟恢复信号进行时钟恢复。
7.如权利要求5所述的显示面板的驱动装置,其特征在于,所述源驱动器,还包括:
与所述第二接收器相连的锁存器,用于根据所述视频数据对显示面板进行驱动。
8.如权利要求5所述的显示面板的驱动装置,其特征在于,所述源驱动器,还包括:
与所述第二接收器相连的数模转换器,用于将所述控制信号转换为模拟控制信号;
与所述数模转换器相连的放大器,用于对所述模拟控制信号进行放大。
9.如权利要求1所述的显示面板的驱动装置,其特征在于,所述显示面板具有有机发光二极管OLED。
10.一种显示面板,其特征在于,包括如权利要求1-9任一项所述的驱动装置。
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US20150103038A1 (en) * | 2013-10-16 | 2015-04-16 | Lg Display Co., Ltd. | Display Device and Method for Driving The Same |
CN104732918A (zh) * | 2013-12-20 | 2015-06-24 | 乐金显示有限公司 | 有机发光显示器 |
JP2015144391A (ja) * | 2014-01-31 | 2015-08-06 | ローム株式会社 | 画像データの受信回路およびそれを用いた電子機器、画像データの伝送方法 |
CN107564464A (zh) * | 2016-06-30 | 2018-01-09 | 乐金显示有限公司 | 有机发光二极管显示装置 |
CN107393503A (zh) * | 2017-07-28 | 2017-11-24 | 北京集创北方科技股份有限公司 | 编码装置、显示控制装置和编码方法 |
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US20200251068A1 (en) | 2020-08-06 |
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