CN108885854A - 用于外部像素补偿的***和方法 - Google Patents

用于外部像素补偿的***和方法 Download PDF

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CN108885854A
CN108885854A CN201780020803.5A CN201780020803A CN108885854A CN 108885854 A CN108885854 A CN 108885854A CN 201780020803 A CN201780020803 A CN 201780020803A CN 108885854 A CN108885854 A CN 108885854A
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pixel
data
dac
offset
electronic equipment
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CN108885854B (zh
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M·B·瓦伊德法尔
J·A·里士摩德
毕亚飞
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Apple Inc
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Apple Computer Inc
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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)
  • Control Of El Displays (AREA)

Abstract

一种电子设备10包括显示面板18。显示面板18包括多个像素62，每个像素包括驱动薄膜晶体管(TFT)和发光二极管。在向所述多个像素提供像素数据之前，所述显示面板18外部的补偿电路152将偏移数据施加于所述多个像素中的每个像素的像素数据。

Description

用于外部像素补偿的***和方法
相关专利申请的交叉引用
本申请是2016年6月30日提交的名称为“SYSTEM AND METHOD FOR EXTERNALPIXEL COMPENSATION”的美国临时专利申请No.62/357,059的非临时性专利申请，所述临时专利申请以引用方式并入本文。
背景技术
本公开涉及用于显示面板中可操作参数偏移的外部补偿。更具体地讲，本公开涉及在这些操作参数偏移时执行外部补偿。
该部分旨在向读者介绍现有技术的各方面，其可能与下文描述和/或受权利要求书保护的本技术的各方面有关。我们认为这种论述有助于为读者提供背景信息以便于更好地理解本公开的各方面。因此，应当理解，要在这个意义上来阅读这些文字描述，而不是作为对现有技术的承认。
许多电子设备包括电子显示器，其通过改变从不同颜色的像素阵列发射的光量来显示图像。对于使用自发射元件(例如，有机发光二极管(OLED))的像素，由于发光二极管(LED)电压变化(例如，Voled)和/或LED电流变化(例如，Ioled)，可能会出现像素不均匀性。随着时间的推移，这些像素不均匀性可引起图像质量的劣化。像素的变化可能由许多不同的因素造成。例如，像素的变化可由显示器的温度变化、显示器的老化(例如，薄膜晶体管(TFT)的老化)、某些显示过程的操作以及其它因素造成。
为了抵消因显示器中的变化所造成的图像劣化，可能需要对这些变化实施像素内补偿或逐像素补偿。然而，随着每英寸像素(PPI)的增加，针对这些变化的像素内或逐像素补偿逻辑可能会变得越来越受限。例如，每英寸的像素值高的显示器可包括较小的像素电路封装。因此，像素内或逐像素补偿电路的尺寸可能会成为限制因素。此外，这些高PPI显示器的定时约束可能会导致像素内或逐像素补偿电路上的定时限制。
发明内容
下文阐述本文所公开的某些实施方案的概要。应当理解，呈现这些方面仅仅是为了向读者提供这些特定实施方案的简明概要，并且这些方面并非旨在限制本公开的范围。实际上，本公开可涵盖下文可能未阐述的多个方面。
为了改善图像质量和一致性，可使用外部补偿电路来抵消由像素内的变化(例如，阈值电压(Vth)偏移)所引起的负伪影。此外，可使用外部补偿电路抵消因发光二极管(LED)(例如，有机发光二极管)可随时间推移出现的电压漂移而引起的负伪影。在当前实施方案中，承载数据电压(Vdata)和/或基准电压(Vref)的线可用于感测可用于像素电路外部的后续补偿的阈值电压(Vth)、LED电压(Voled)和/或LED电流(例如，Ioled)。例如，基于Vth、Voled和/或Ioled值的偏移数据可用于补偿逻辑，该补偿逻辑基于显示器像素之间的不一致来调节显示器输出。
如上所述，像素内补偿可用于校正像素不均匀性。此类补偿可利用像素的电容器来存储与像素相关的数据。然后，所存储的数据可在单独的步骤中用于像素补偿。遗憾的是，像素内补偿有时可能会很慢，会花费大量的时间来存储数据，然后利用数据进行像素补偿。另外，对于某些电子设备(尤其是带有小型集成电路封装的电子设备)而言，用于像素内补偿的硬件要求可能非常高。例如，用于存储像素信息的存储电容器可能会相当大，需要在有限的集成电路封装中占用大量的电路面积。
因此，在本文所述的一些实施方案中，外部补偿技术可获得关于显示面板的某些信息，并且在提供给显示面板的输入数据到达显示面板(例如，像素电路的外部)之前改变这些数据。基于所获得的关于显示面板的信息，对输入数据的改变有效地补偿了不均匀性。例如，可使用当前技术校正的不均匀性可包括：相邻像素具有类似的数据，但相邻像素之间的亮度、颜色不均匀性不同，以及像素行不一致、像素列不一致等。如下文将更详细地讨论的那样，可使用偏移数模转换器将偏移数据施加于像素数据，从而得到在显示面板上实施的外部补偿像素数据。
对上述特征的各种改进可能相对于本发明的各个方面而存在。也可在这些各个方面中加入其他特征。这些改进和附加特征可以单独存在，也可以任何组合的形式存在。例如，下面讨论的与一个或多个所示实施方案相关的各种特征可单独地或以任何组合形式结合到本发明上述方面的任何一个中。上文所呈现的简要概要仅旨在使读者熟悉本公开实施方案的特定方面和上下文，并不限制要求保护的主题。
附图说明
通过阅读以下详细描述并参考附图，可以更好地理解本发明的各个方面，在附图中：
图1是根据一个实施方案的包括显示器的电子设备的示意性框图；
图2是根据一个实施方案的表示图1的电子设备的一个实施方案的笔记本式计算机的透视图；
图3是根据一个实施方案的表示图1的电子设备的另一个实施方案的手持式设备的前视图；
图4是根据一个实施方案的表示图1的电子设备的另一个实施方案的另一个手持式设备的前视图；
图5是根据一个实施方案的表示图1的电子设备的另一个实施方案的台式计算机的前视图；
图6是根据一个实施方案的表示图1的电子设备的另一个实施方案的可穿戴电子设备的前视图；
图7是示出根据一个实施方案的图1的显示器的像素矩阵的一部分的电路图；
图8是示出根据一个实施方案的用于显示面板处的像素外部补偿和后续处理的过程的示意图；
图9是示出根据一个实施方案的施加于驱动器集成电路中的偏移数据的示意图；
图10是示出根据一个实施方案的在电流域中的偏移数据的应用的示意图；
图11是示出根据一个实施方案的在源极驱动器中施加偏移数据的电路的示意图；
图12是示出根据一个实施方案的比图11中的实施方案更精细的型式的示意图；以及
图13是示出根据一个实施方案的电压感测的第二相位的电路图。
具体实施方式
下文将描述本发明的一个或多个具体实施方案。这些所描述的实施方案仅为目前所公开的技术的示例。此外，为了提供这些实施方案的简明描述，在本说明书中可能未描述实际具体实施的所有特征。应当认识到，在任何此类实际具体实施的开发中，如任何工程学或设计项目中那样，必须要作出特定于许多具体实施的决策以实现开发者的具体目标，诸如符合可能随具体实施变化的与***相关的约束条件和与事务相关的约束条件。此外，应当理解，此类开发努力可能是复杂且耗时的，但对于从本公开中受益的普通技术人员而言，其可能仍然是设计、制造和生产的常规任务。
在介绍本公开的各种实施方案的元件时，冠词“一个”、“一种”和“该/所述”旨在意指存在所述元件中的一个或多个。术语“包括”(“comprising”,“including”)和“具有”旨在被包括在内，并且意指可能存在除列出的元件之外的附加元件。此外，应当理解，参考本公开的“一个实施方案”或“实施方案”并非旨在被解释为排除同样结合所引述的特征的附加实施方案。
本公开涉及用于可出现在显示面板中的不均匀性的外部补偿。更具体地，当前实施方案描述了用于偏移数据的外部至像素应用的技术，其中偏移数据描述了像素级的不均匀性。
首先转到图1，根据本公开的实施方案的电子设备10除了别的之外可包括具有一个或多个处理器的处理器内核复合体12、存储器14、非易失性存储装置16、显示器18、输入结构22、输入/输出(I/O)接口24、网络接口26和电源28。图1中所示的各种功能块可包括硬件元件(包括电路)、软件元件(包括存储在计算机可读介质上的计算机代码)、或硬件元件和软件元件两者的组合。应当指出，图1仅是特定具体实施的一个示例，并且旨在示出可能存在于电子设备10中的部件的类型。
以举例的方式，电子设备10可代表图2中所示的笔记本电脑、图3中所示的手持式设备、图4中所示的台式计算机、图5中所示的可穿戴电子设备或类似设备的框图。应当注意，处理器内核复合体12和/或其它数据处理电路在本文一般可被称为“数据处理电路”。这种数据处理电路可整体或部分地以软件、固件、硬件、或它们的任意组合来实施。此外，数据处理电路可以是被包含的单个处理模块，或者可以完全或部分地结合在电子设备10内的其他元件中的任一个元件内。
在图1的电子设备10中，处理器内核复合体12和/或其它数据处理电路可与存储器14和非易失性存储装置16可操作地耦接，以执行各种算法。由处理器内核复合体12执行的此类程序或指令可存储在任何合适的制品中，所述任何合适的制品可包括至少共同地存储指令或例程的一个或多个有形的计算机可读介质，诸如存储器14和非易失性存储装置16。存储器14和非易失性存储装置16可包括用于存储数据和可执行指令的任何合适的制品，诸如随机存取存储器、只读存储器、可重写闪存存储器、硬盘驱动器、和光盘。另外，在此类计算机程序产品上编码的程序(例如，操作***)还可包括可由处理器内核复合体12执行以使得电子设备10能够提供各种功能的指令。
如下文将进一步讨论的那样，显示器18可包括诸如有机发光二极管(OLED)、微型发光二极管(μ–LED)或任何其它发光二极管(LED)的像素。此外，显示器18不限于特定像素类型，因为本文所公开的电路和方法可适用于任何像素类型。因此，虽然可在本公开中示出特定像素结构，但本公开可涉及显示设备内广泛的照明部件和/或像素电路。
如下文更详细地讨论的那样，外部补偿电路19可在显示数据到达显示器18(或显示器18的像素部分)之前改变被提供给该显示器18的显示数据。显示数据的这种改变可有效补偿显示器18的像素不均匀性。例如，可使用当前技术校正的不均匀性可包括：相邻像素具有类似的数据，但相邻像素之间的亮度、颜色不均匀性不同，以及像素行不一致、像素列不一致等。
电子设备10的输入结构22可使用户能够与电子设备10进行交互(例如，按下按钮以增大或减小音量水平)。正如网络接口26那样，I/O接口24可以使电子设备10能够与各种其他电子设备进行交互。网络接口26可包括例如用于以下网络的接口：个人局域网(PAN)诸如蓝牙网络、局域网(LAN)或无线局域网(WLAN)诸如802.11x Wi-Fi网络、和/或广域网(WAN)诸如第三代(3G)蜂窝网络、***(4G)蜂窝网络或长期演进(LTE)蜂窝网络。网络接口26还可包括用于例如以下各项的接口：宽带固定无线接入网络(WiMAX)、移动宽带无线网络(移动WiMAX)、异步数字用户线路(例如，15SL、VDSL)、数字视频地面广播(DVB-T)及其扩展DVB手持式设备(DVB-H)、超宽带(UWB)、交流(14)电力线等。
在某些实施方案中，电子设备10可以采取以下形式：计算机、便携式电子设备、可穿戴电子设备，或其他类型的电子设备。此类计算机可包括通常便携的计算机(例如膝上型电脑、笔记本电脑和平板电脑)以及通常在一个地点使用的计算机(例如常规的台式计算机、工作站和/或服务器)。在某些实施方案中，计算机形式的电子设备10可以是购自AppleInc.的Pro、MacBookmini或Mac型电子设备。举例来说，根据本发明的一个实施方案，在图2中示出了采取笔记本式计算机30A形式的电子设备10。所示出的计算机30A可包括外壳或壳体32、显示器18、输入结构22、以及I/O接口24的端口。在一个实施方案中，输入结构22(诸如键盘和/或触摸板)可用于与计算机30A进行交互，诸如启动、控制或操作GUI或在计算机30A上运行的应用程序。例如，键盘和/或触摸板可以允许用户在显示器18上显示的用户界面或应用程序界面上导航。
图3描绘了手持式设备30B的前视图，该手持式设备表示电子设备10的一个实施方案。手持式设备34可表示例如便携式电话、媒体播放器、个人数据管理器、手持式游戏平台或此类设备的任何组合。举例来说，手持式设备34可以是购自Apple Inc.(Cupertino,California)的或型手持式设备。
手持式设备30B可以包括壳体36，该壳体用于保护内部部件免遭物理性损坏并且用于屏蔽内部部件使其免受电磁干扰。壳体36可以包围显示器18，该显示器可以显示指示符图标39。除了其它内容，该指示符图标39可指示手机信号强度、蓝牙连接和/或电池寿命。I/O接口24可通过壳体36打开并且可包括例如用于硬质有线连接的I/O端口以用于使用标准连接器和协议诸如由Apple Inc.提供的闪电连接器、通用串行总线(USB)，或其他类似的连接器和协议进行充电和/或内容操控。
结合显示器18的用户输入结构42可允许用户控制手持式设备30B。例如，输入结构40可激活或去激活手持式设备30B，输入结构42可将用户界面导航到主屏幕以及用户可配置的应用屏幕，和/或激活手持式设备30B的语音识别特征，该输入结构42可提供音量控制或者可在震动模式与响铃模式之间来回切换。输入结构42还可包括获得用于各种语音相关特征的用户语音的麦克风，以及可启用音频回放和/或某些电话功能的扬声器。输入结构42还可包括可提供与外部扬声器和/或耳机的连接的耳机输入端。
图4描绘了另一个手持式设备30C的前视图，该手持式设备表示电子设备10的另一个实施方案。手持式设备30C可以表示例如平板计算机，或者各种便携式计算设备中的一种。举例来说，手持式设备30C可以是电子设备10的平板电脑尺寸实施方案，具体可以是例如购自Apple Inc.(Cupertino,California)的型手持式设备。
参见图5，计算机30D可表示图1的电子设备10的另一个实施方案。计算机30D可以是任何计算机，诸如台式计算机、服务器或笔记本式计算机，但也可以是独立媒体播放器或视频游戏机。举例来说，计算机30D可为Apple Inc.的或其它类似设备。应当注意，计算机30D还可表示另一制造商的个人计算机(PC)。可提供类似的壳体36，以保护并包围计算机30D的内部部件诸如显示器18。在某些实施方案中，计算机30D的用户可使用各种***输入设备诸如可经由有线和/或无线I/O接口24连接到计算机30D的输入设备22或鼠标38来与计算机30D进行交互。
类似地，图6描绘了表示图1的电子设备10的另一个实施方案的可穿戴电子设备30E，该可穿戴电子设备可被配置为使用本文所述的技术进行操作。举例来说，可穿戴电子设备30E可包括腕带43，可以是Apple Inc.的Apple然而，在其它实施方案中，可穿戴电子设备30E可包括任何可穿戴电子设备，诸如可穿戴运动监测设备(例如，计步器、加速度计、心律监测器)或另一制造商的其它设备。可穿戴电子设备30E的显示器18可包括可允许用户与可穿戴电子设备30E的用户界面进行交互的触摸屏。
用于电子设备10的显示器18可包括包含发光电路的像素矩阵。因此，图7示出了包括显示器18的像素矩阵的一部分的电路图。如图所示，显示器18可包括显示面板60。此外，显示面板60可包括布置为阵列或矩阵的多个单位像素62(此处示出了六个单位像素62A、62B、62C、62D、62E和62F)，所述阵列或矩阵限定单位像素62的多个行和列，它们共同形成显示器18的可视区域，在该可视区域中可以显示图像。在这样的阵列中，每个单位像素62可由行与列的相交点限定，所述行和列在此处分别由示出的栅极线64(也称为“扫描线”)和数据线66(也称为“源极线”)表示。另外，电源线路68可向每一个单位像素62提供电力。
虽然仅示出了六个单位像素62，其分别单独地由参考标号62a至62f指代，但应当理解，在实际的具体实施中，每根数据线66和栅极线64可包括成百甚至上千个此类单位像素62。举例来说，在具有1024×768的显示分辨率的彩色显示面板60中，每根数据线66可限定像素阵列的一列，可包括768个单位像素，而每根栅极线64可限定像素阵列的一行，可包括1024组单位像素，每组包括一个红色、一个蓝色和一个绿色像素，因此每条栅极线64上总共有3072个单位像素。再举例来说，面板60可具有480×320或960×640的分辨率。在当前例示的实施例中，单位像素62可表示具有红色像素(62A)、蓝色像素(62B)和绿色像素(62C)的一组像素。单位像素62E、62E和62F组成的像素组可按类似的方式布置。另外，在行业中，术语“像素”也是常见的，它可指一组相邻的不同颜色的像素(例如，红色像素、蓝色像素和绿色像素)，组中的每个单独彩色像素被称为“子像素”。
显示器18还包括源极驱动器集成电路(IC)90，其可包括被配置为控制显示器18和面板60的各个方面的芯片，诸如处理器或ASIC。例如，源极驱动器IC 90可从处理器核心复合体12接收图像数据92，并将对应的图像信号发送至面板60的单位像素62。源极驱动器IC90还可耦接到栅极驱动器IC 94，该栅极驱动器IC可被配置为经由栅极线64提供/移除栅极激活信号以激活/去激活单位像素62的像素行。源极驱动器IC 90可包括定时控制器，该定时控制器确定定时信息/图像信号96并将其发送至栅极驱动器IC 94，以有利于单个行的单元像素62的激活和去激活。在其它实施方案中，可用一些其它方式将定时信息提供给栅极驱动器IC 94(例如，使用独立于源极驱动器IC 90的定时控制器)。此外，虽然图7仅示出了单个源极驱动器IC 90，但应当理解，其它实施方案可利用多个源极驱动器IC 90来向单位像素62提供定时信息/图像信号96。例如，另外的实施方案可包括沿着面板60的一个或多个边缘设置的多个源极驱动器IC 90，其中每个源极驱动器IC 90被配置成控制数据线66和/或栅极线64的子组。
在运行中，源极驱动器IC 90从处理器内核复合体12或分立显示控制器接收图像数据92，并且基于所接收的数据输出信号以控制单位像素62。当单位像素62受源极驱动器IC 90控制时，单位像素62内的电路可在电源98和单位像素62的光元件之间完成回路。另外，为了测量显示器18的工作参数，可将测量电路100定位在源极驱动器IC 90内以读取显示器18的各种电压和电流特性，如下文详细讨论。
来自测量电路100的测量结果(或其它信息)可用于确定单个像素的偏移数据(例如，62A至62F)。偏移数据可表示像素之间的不均匀性，诸如：相邻像素具有类似的数据，但相邻像素之间的亮度、颜色不均匀性不同，以及像素行不一致、像素列不一致等。此外，可将偏移数据施加于控制像素的数据(例如，62A至62F)，从而得到可有效地去除这些不一致的补偿像素数据。
出于这种考虑，图8示出了根据一个实施方案的用于显示器18处的像素62外部补偿和后续处理151的过程150的框图。诸如片上***(SOC)152的电路可用于在像素数据到达显示面板60之前对该数据进行预处理。SOC 152中的像素数据位于数字处理域中。在SOC152侧上，表示像素62之间不均匀性或不匹配度的偏移数据154被添加155至像素的灰度数据156(电压值)，其使用N个字节输入数据158来确定。这样将偏移数据154添加至灰度数据156导致了每个像素具有N+M个字节的偏移灰度数据。偏移灰度数据被映射到γ域，如框159所示。对于显示面板60的每个像素62实施该过程150。然后，每个像素62的映射偏移灰度数据160(例如，每个像素62的外部补偿数据)被提供161给显示面板60。
然后，显示面板60可执行显示面板60处理151。首先，显示面板60可执行线性数模转换，将来自灰度数据(G)的数据160转换为电压(v)162(例如，经由γDAC 163)，如框164所示。可将电压162施加于驱动TFT 165，从而产生电流(I)166，如框168所示。然后将电流166施加于像素62的二极管，从而在像素62的二极管171处产生输出的光或亮度(Lv)170，如框172所示。
在SOC 152中的转化可能很复杂，并且有时可能会导致额外的错误。这些错误可导致像素62的不均匀性(例如，颜色错配等)。此外，输入数据大小(例如，N+M个字节数据)的增加可得到使用更高带宽的接口，因此，会使用更多的电力，以及待DAC 163处理的更高的精度。
在一些实施方案中，在驱动器集成电路中施加偏移信息以进行像素补偿可能是有益的。图9示出了电路200的此类实施方案，其中偏移数据被施加在驱动器集成电路中，而不是施加在SOC 152或像素62中。如上所述，在图8的实施方案中，修改了SOC 152以允许偏移数据154被添加155至灰度数据156。此外，由于图8的实施方案在数字域中执行处理，因此使用线性DAC将数字灰度数据160转换为电压。换句话讲，先将非线性数据映射到线性数据，然后返回至非线性数据。因此，在驱动器IC 94中实施偏移数据154添加的图9的实施方案可能是有益的，因为显示器流水线架构可不受外部补偿的影响。例如，SOC 152和像素62可保持不变。另外，如图9所示，两个并行接口可按像素62发送像素62数据158和偏移数据154，从而提高处理速度。
为了执行外部补偿，添加电路以执行虚线框204中提供的驱动器IC 94外部补偿操作。如图9所示，每个像素62的数据158都被提供给非线性γDAC 205。每个像素62的偏移数据154被串行地或并行地提供给驱动器IC 94的线性偏移DAC 206。数模转换得到模拟偏移信息(Vth信息)208。Vth信息208经由添加210功能添加到驱动器IC 94中DAC 205的输出电压。补偿电压从添加210功能传递至像素62，其中将电压施加于驱动TFT 165，从而产生电流166(框168)。将电流166施加于二极管171，从而产生由二极管171发射的光或亮度(Lv)170。
图9的处理既可在电流域也可在电压域中完成。图10示出了用于在电流域中实施图9的处理的电路230。在图10的电路230中，处理步骤和电路部件中的每一者都与图9类似，不同的是非线性γDAC 205'和线性偏移DAC 206’均处于电流模式。另外，由于驱动TFT 165带电压工作，电流-电压(I2V)转换电路232可将补偿电流转换为电压，以便向TFT 165提供电压。在一些实施方案中，在添加210之前，可在DAC 205和DAC 206输出的每一者中发生电流-电压转换。
现在转到电压域具体实施，存在多个可实现的技术来偏置驱动器IC中的电压数据。在一个实施方案中，可使用运算放大器(OPAMPS)来添加DAC 205和DAC 206两者的电压输出。然而，该方法可利用更多的电力和电路区域，因为每像素62可使用附加的放大器。
另选地或除此之外，在一些实施方案中，偏移DAC 206可嵌入源极驱动器IC 90中。如上所述，源极驱动器IC 90驱动像素62列中的每一者。图11和图12示出了其中偏移DAC206嵌入源极驱动器IC 90中的实施方案。如图11的电路250所示，γDAC 205可提供源极驱动器IC 90的输入电压(Vin)。另外，偏移DAC 206'和电阻器252电耦合到源极驱动器IC 90的反馈路径254。电阻器252可利用由电压偏移(VOFFSET)限定的可编程电阻值。使用这种配置，可提供偏移DAC 206'和γDAC 205的总和，以及电流-电压转换(I2V)，如框256所示。
图12示出了实施图11的嵌入式偏移DAC 206'技术的电路270，利用提供给源极驱动器IC 90反馈路径254的分段电流进行微调。如图所示，耦接到反馈路径254的电流输出272和274被分段并隔离。对应电阻器252'和252”分别用于相应的分段电流输出272和274。虽然当前实施方案示出了两个分段电流输出272和274，但根据微调的需要，可使用任意数量的电流分段。
在一些实施方案中，γDAC 205和偏移DAC 206均提供电压。图13示出了根据实施方案的用于添加γDAC 205和偏移DAC 206的电路。如图13所示，γDAC 205的电压被减半并作为输入电压(Vin1/2)提供给源极驱动器IC 90。将电阻器302施加于偏移DAC 206，并且将电阻器304施加于源极驱动器IC 90的反馈路径254。具有施加的电阻器302的偏移DAC 206在电阻器304之后被嵌入反馈254中。使用这种配置，输出306是被添加到γDAC 205输出中的偏移DAC 206输出。
虽然已经通过举例的方式示出了上述具体实施方案，但是应当理解，这些实施方案可以容许各种修改和替代形式。还应当理解，权利要求书不是旨在限于所公开的特定形式，而是旨在涵盖落在本公开的实质和范围内的所有修改形式、等同形式和替代形式。

Claims (20)

1.一种电子设备，包括：
显示面板，包括：
多个像素，所述多个像素中的每个像素包括：
驱动薄膜晶体管(TFT)，所述驱动薄膜晶体管被配置为接收相应像素的像素数据；以及
发光二极管，所述发光二极管被配置为基于提供给所述相应像素的所述像素数据发光；以及
补偿电路，其中所述补偿电路被配置为在向所述相应像素提供所述像素数据之前，将偏移数据施加于所述多个像素中的每个像素的像素数据。
2.根据权利要求1所述的电子设备，还包括处理单元，其中将所述偏移数据添加到所述SOC中的所述像素数据中，从而得到偏移像素数据。
3.根据权利要求2所述的电子设备，其中所述电子设备被配置为将所述偏移像素数据映射到所述处理单元中的γ域，从而得到要向所述显示面板提供的偏移灰度数据。
4.根据权利要求3所述的电子设备，还包括：
γ数模转换器(DAC)，所述γDAC被配置为将所述偏移灰度数据转换为电压数据；以及
其中将所述电压数据施加于所述驱动TFT，得到施加于所述发光二极管的电流，从而导致所述发光二极管发光。
5.根据权利要求1所述的电子设备，包括：
处理单元；以及
驱动器集成电路(IC)，包括：
γ数模转换器(DAC)；以及
偏移DAC；
其中所述处理单元被配置为：
向所述驱动器IC的所述γDAC提供所述像素数据；以及
向所述驱动器IC的所述偏移DAC提供所述偏移数据；
其中所述驱动器IC被配置为通过添加所述γDAC的输出和所述偏移DAC的输出来提供补偿像素数据；以及
其中向所述多个像素提供所述补偿像素数据，并且每个像素的发光二极管基于所述补偿像素数据发光。
6.根据权利要求5所述的电子设备，其中所述补偿像素数据包括补偿电压测量结果，所述补偿电压测量结果被施加于所述驱动TFT，得到施加于所述发光二极管的电流，从而导致所述发光二极管发光。
7.根据权利要求5所述的电子设备，还包括：
一个或多个运算放大器，所述运算放大器被配置为添加所述γDAC的输出和所述偏移DAC的输出。
8.根据权利要求5所述的电子设备，其中所述补偿像素数据包括被转换成补偿电压测量结果的补偿电流测量结果，所述补偿电压测量结果被施加于所述驱动TFT，得到施加于所述发光二极管的电流，从而导致所述发光二极管发光。
9.根据权利要求5所述的电子设备，包括：
源极驱动器，所述源极驱动器包括：
反馈路径；以及
第一可编程电阻器，所述第一可编程电阻器设置在所述反馈路径中；
其中所述γDAC的输出是作为输入提供给所述源极驱动器的电压；以及
其中所述偏移DAC的输出是提供给所述反馈路径的电流。
10.根据权利要求9所述的电子设备，还包括设置在所述反馈路径中的第二可编程电阻器，
其中所述偏移DAC的输出被分段成提供给所述反馈路径的多个电流。
11.根据权利要求5所述的电子设备，还包括：
源极驱动器，所述源极驱动器包括：
反馈路径；以及
第一可编程电阻器，所述第一可编程电阻器设置在所述反馈路径中；
其中所述γDAC的输出为第一电压，所述第一电压被减半并作为输入提供给所述源极驱动器；以及
其中所述偏移DAC的输出为第二电压，所述第二电压被加倍并电耦合到与所述反馈路径电耦合的第二可编程电阻器。
12.一种操作具有显示面板的电子设备的方法，包括：
在向所述电子设备的所述显示面板的多个像素提供像素数据之前，将偏移数据施加于所述多个像素中的每个像素的像素数据，从而得到补偿像素数据；
在所述多个像素中的每个像素的驱动薄膜晶体管(TFT)处施加基于所述补偿像素数据的补偿电压数据，从而产生补偿电流；以及
将所述补偿电流施加于所述多个像素中的每个像素的对应二极管。
13.根据权利要求12所述的方法，还包括将所述偏移数据施加于所述电子设备的处理单元中的像素数据。
14.根据权利要求12所述的方法，还包括将所述偏移数据施加于所述电子设备的驱动集成电路(IC)中的像素数据。
15.根据权利要求14所述的方法，还包括：
当所述补偿像素数据包括电流时，将所述电流转换为所述补偿电压。
16.一种电子显示器电路，包括：
显示面板；以及
补偿电路，所述补偿电路被配置为在向所述显示面板的多个像素提供像素数据之前将偏移数据施加于所述多个像素中的每个像素的像素数据，使得向每个像素的驱动薄膜晶体管(TFT)施加补偿电压，从而产生施加于每个像素的发光二极管的补偿电流。
17.根据权利要求16所述的电子显示器电路，还包括驱动器集成电路(IC)，所述驱动器集成电路(IC)包括外部补偿电路。
18.根据权利要求16所述的电子显示器电路，还包括：
第一数模转换器(DAC)，所述第一DAC被配置为接收所述像素数据；以及
第二DAC，所述第二DAC被配置为接收所述偏移数据，
其中所述第一DAC的输出与第二DAC的输出相加，从而得到补偿像素数据。
19.根据权利要求18所述的电子显示器电路，其中所述第一DAC、所述第二DAC或两者为被配置为输出电流的电流模式DAC。
20.根据权利要求19所述的电子显示器电路，还包括：
电流转换电路，所述电流转换电路被配置为将所述电流转换为所述补偿电压。
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US20190019459A1 (en) 2019-01-17
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