CN104769661B - 显示器中的亮度补偿 - Google Patents

显示器中的亮度补偿 Download PDF

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CN104769661B
CN104769661B CN201380057395.2A CN201380057395A CN104769661B CN 104769661 B CN104769661 B CN 104769661B CN 201380057395 A CN201380057395 A CN 201380057395A CN 104769661 B CN104769661 B CN 104769661B
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pixel
display device
pixels
pressure drop
electric current
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CN104769661A (zh
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刘博�
安德鲁·加布里埃尔·林兹勒
米切尔·奥斯汀·麦卡西
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University of Florida Research Foundation Inc
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    • G09G3/20—Control 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
    • G09G3/22—Control 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
    • G09G3/30—Control 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
    • G09G3/32—Control 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]
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    • G09G3/3258—Control 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 voltage across the light-emitting element
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    • G09G3/30—Control 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
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Abstract

提供了关于显示器中的亮度补偿的多个示例。在一个示例中，一种方法包括：识别对于由供电电压线供电的像素的IR压降效应；以及至少部分地基于IR压降效应来生成用于所述像素的亮度信号。在另一示例中，一种方法包括：计算与由共用供电电压线供电的像素对应的IR压降的值；以及向每个像素提供补偿IR压降的数据线信号。在另一示例中，一种显示设备包括：像素矩阵；和亮度控制器，所述亮度控制器被配置成确定对于所述矩阵中的像素的IR压降效应并且至少部分地基于IR压降效应以及与所述像素相关联的在一个刷新循环内的瞬时平均像素亮度来生成用于所述像素的亮度信号。

Description

显示器中的亮度补偿
相关申请的交叉引用
本申请要求2012年11月5日提交的题为“BRIGHTNESS COMPENSATION IN ADISPLAY”的共同待审的美国临时申请系列号61/722,496的优先权和权益，其全部内容通过引用合并至本文。
背景技术
显示设备例如有源矩阵有机发光二极管(AMOLED)显示器可以包括若干像素。所述像素可以周期性地被刷新以显示静态画面或动态画面。
附图说明
参照附图可以更好的理解本公开内容的许多方面。附图中的部件不一定按比例绘制，相反重点在于清楚地示出本公开内容的原理。此外，在附图中，相同的附图标记指定贯穿若干视图的对应部件。
图1是根据本公开内容的各种实施方式的显示设备的一部分的电路图。
图2是图1的根据本公开内容的各种实施方式的显示设备中的像素的示例的电路图。
图3是示出根据本公开内容的各种实施方式的由图1的显示设备中的控制器实现的功能的示例的流程图。
图4是图1的根据本公开内容的各种实施方式的显示设备的示例的示意性框图。
具体实施方式
有源矩阵有机发光二极管(AMOLED)与LCD显示器相比具有较宽的视角、较亮、具有较快的响应时间、较薄的面板并且消耗较少的能量。AMOLED面板中的每个像素包括点亮以形成显示的有机发光二极管(OLED)。像素被布置成矩阵，其中以逐行的方式完成对屏幕的刷新。在给定的时隙内同时刷新行中的每个像素，之后将像素保持在规定的亮度水平下直到下一次刷新循环为止，因此，与其中每个像素仅在被寻址时保持其亮度的无源矩阵相对比，这被称为有源矩阵。为了显示器正常工作，AMOLED显示器中的像素被设置成适合于待被表达的特定整体场景的亮度水平并且必须保持(“记住”)该亮度水平直到下一次刷新针对下一场景重新设置该像素为止。为了实现上述目的，每个像素包含用于驱动每个像素的OLED的电路，该电路被称为像素电路。像素电路通过向每个电路提供信号和电力的总线线路来连接。像素电路和总线线路形成AMOLED的背板。
参照图1，示出了根据本公开内容的实施方式的显示设备100的一部分的电路图。显示设备100可以包括：例如，有源矩阵有机发光二极管(AMOLED)面板；或如下所述的任意类型的显示设备：其中瞬时像素光输出取决于通过像素内的发光子部件的电流，与其他像素共用供应该电流的总线线路，并且沿总线线路的多个像素被同时点亮。如图1所示，显示设备100包括被布置成列C1-Cx、行R1-Ry的像素矩阵103。显示设备100还包括耦接至列C1-Cx中的每一列中的像素103的供电电压线109(还被称为VDD)。另外，每行R1-Ry像素103包括扫描线113，并且每列像素103包括数据线116。
在给定时隙内同时刷新显示设备100的特定行R1-Ry中的所有像素103，之后将这些像素103保持在规定的亮度水平下直到特定行R1-Ry在下一刷新循环中被刷新为止。为此，向每个数据线116施加亮度信号，并且确定扫描线113中的一条扫描线。响应于被确定的扫描线113，将施加至数据线116的亮度信号提供至相应行R1-Ry中的相应像素103。此后，向数据线116施加新的亮度信号，并且确定下一行R1-Ry的扫描线113。作为响应，向具有被确定的扫描线113的新行R1-Ry的像素103提供被施加至数据线116的亮度信号。然后，显示设备100的所有剩余行R1-Ry重复该过程，从而生成画面。还可以使用数据线116上的变化的信号针对所有像素103重复该过程以生成动态画面。
参考图2，示出了根据本公开内容的各种实施方式的显示设备100(图1)中的像素103中的一个像素的示例的电路图。如所示出的，像素103可以包括：一条数据线116、供电电压线109和一条扫描线113。另外，像素103可以包括：开关晶体管203、驱动晶体管206、电容器209、发光器件213、以及为了简明起见未详细讨论的潜在地其他部件。应该理解，在可替代的实施方式中可以使用其他电路配置和部件用于像素103。
发光器件213被配置成响应于流过发光器件213的电流而发射光。因此，发光器件213可以以下述形式实现：例如，有机发光二极管(OLED)、无机发光二极管(LED)、基于量子点的发光二极管或任意其他类型的发光器件。
驱动晶体管206被配置成提供并且控制流过发光器件213的电流的量。为此，驱动晶体管206的第一端子206a被耦接至供电电压线109，而驱动晶体管206的第二端子206b被耦接至发光器件213。如本领域的普通技术人员可以理解的那样，从驱动晶体管206的第一端子206a流到第二端子206b的电流的量取决于施加至驱动晶体管206的第三端子206c的电压水平。例如，对于驱动晶体管206是在饱和区中操作的p型MOS晶体管的情况而言，可以使用以下公式对流过驱动晶体管206的电流建模：
(公式1)
其中，I是通过驱动晶体管206的电流，VDATA是来自数据线116的亮度信号的电压，VDO是供电电压线109上的电压，阈值电压VTH＜0并且栅极电介质的面积比电容是C，晶体管的迁移率是μ，以及晶体管沟道宽度与沟道长度比是
开关晶体管203被配置成向驱动晶体管206的第三端子206c提供来自数据线116的信号。为此，开关晶体管203的第一端子203a耦接至数据线116，开关晶体管203的第二端子203b耦接至驱动晶体管206的第三端子206c，而开关晶体管203的第三端子203c耦接至扫描线113。开关晶体管203可以响应于提供至扫描线113上的信号而“导通”或“关断”。在这种意义上，当扫描线113信号被确定时，致使开关晶体管203为“导通”，来自数据线116的信号经过开关晶体管203到达驱动晶体管206的第三端子206c。当扫描线113未被确定时，开关晶体管203为“关断”，防止了数据线116上的信号在驱动晶体管206的第三端子206c处被接收。
电容器209存储电压值(即，亮度信号)，当开关晶体管203为“导通”时该电压值被提供至驱动晶体管206的第三端子206c，而当开关晶体管203为“关断”时，电容器209基本上保持该电压值。因为电容器209被耦接至驱动晶体管206的第三端子206c，所以电容器209有助于保持在显示设备100的刷新循环之间流过发光器件213的特定电流值。
在像素103刷新期间，向数据线116提供亮度信号，并且确定扫描线113以将开关晶体管203“导通”并且因此使数据线116上的亮度信号被提供至驱动晶体管206的第三端子206c。响应于在驱动晶体管206的第三端子206c处接收的亮度信号，并且响应于在驱动晶体管206的第一端子206a处的供电电压的特定值，电流从驱动晶体管206的第一端子206a流到第二端子206b并且流过发光器件213。这种电流关系可以例如通过公式1来建模。根据流过发光器件213的电流，从发光器件213发射光。因为从发光器件213发射的光的亮度取决于从驱动晶体管206流入的电流的量，所以光的亮度还取决于在驱动晶体管206的第一端子206a处的供电电压值和第三端子206c处的亮度信号。
在图1中示出的实施方式中，对于显示设备100中的所有像素103，供电电压线109被耦接至驱动晶体管206的第一端子206a。因为供电电压线109是非理想导体，所以像素103经受所谓的“IR压降”。因为供电电压线109的电阻不为零，所以电压(V＝IR)降将会沿供电电压线109呈现出来。这种IR压降会影响显示设备100的亮度均匀性。因此，相对远离供电电压线109的输入点的像素103可以接收例如与相对靠近该输入点的像素103相比较低的供电电压。例如，针对像素103的列的简化供电电压模型可以表示为：
(公式2)
其中，Vi是由特定像素103从在位置i处的供电电压线109得到的供电电压，VDD0是供电电压线109的在显示设备100的输入点处的电压，r是供电电压线109的在相邻像素103之间的部分的电阻，n是列C1-Cy中的像素103的数目，以及Im是通过像素m(从1到n)的电流。因此，对于每个像素103，公式2可以代替公式1中的VDD以考虑IR压降。
假设对于像素i的电流变化的量为ΔIi＝I下一帧-I当前帧，供电电压线119需要承载该ΔIi直到像素i。因为线路的电阻的数值相对小，并且由一个像素可能产生的电流变化与由供电电压线109承载的总电流相比较小，所以可以忽略高阶效应，并且，在该假设下，由像素i得到的电压变化可以表示为：ΔVi＝-i×r×ΔIi。因为在位置i处的像素的电压变化是由在位置i处的像素本身引起的，所以ΔVi可以被重新写为ΔVi，i，其中，第一个下标表示电压已受影响的像素，而第二个下标表示在其处电流被改变的像素，该电流改变是由该电压变化引起的。考虑到与其他像素的串扰，在位置i处的像素的电流变化ΔIi可以导致在位置j处的像素的电压变化，对于j＞i，电压变化可以表示为ΔVj，i＝-i×r×ΔIi。
供电电压线109还会促使由于像素103的刷新而产生的无意串扰。例如，由于在位置m处的第二像素103的电流变化而引起的在位置i处的第一像素103的供电电压的变化可以表示如下，其中，第一像素103和第二像素103处于同一列C1-Cy：
其中，ΔVi，m是在位置i处的第一像素103的相对于在位置m处的第二像素103的电流变化(ΔIm)的供电电压变化。在像素处的相对于供电电压变化的电流变化可以通过公式1关于VDD求导数来近似。使用公式1和公式3，由于在位置m处的第二像素103的电流变化而产生的在位置i处的第一像素103的电流的变化可以使用以下公式表示：
(公式4)
其中，VIi，m是由于在位置m处的第二像素的电流的变化(VIm)而产生的在位置i处的第一像素103的电流的变化，ΔVi，m对应于公式3，以及VDD(i，m-1)表示在考虑IR压降的情况下紧在位置m处的像素改变其电流之前由在位置i处的像素得到的供电电压线109上的电压。因此，公式4提供了在考虑了IR压降和串扰的影响的情况下对像素103的电流变化的估计。因此，公式4例如可以用于识别IR压降和串扰对像素103的影响。在ΔVi，m小的情况下，公式4可以被近似为：
ΔIi，m＝-k×(VDATA(i)-VDD(i，m-1)-VTH)×ΔVi，m (公式5)
如现在将要描述的，对于每个像素103，可以向数据线116施加补偿亮度信号，该补偿亮度信号致使由驱动晶体管206提供的平均实际电流值基本上与目标电流相同。首先，下述示例假设显示设备100先前已使用未补偿的亮度信号刷新了像素103并且显示设备100准备开始像素103刷新。
显示设备100可以识别预期致使列中的像素103发射期望光亮度的新目标电流值为此，显示设备100可以查询其中存储有值的查找表，或者显示设备可以使用例如将像素103亮度建模作为驱动电流的函数的公式来计算该值。
然后，显示设备100可以识别从当像素103被先前刷新时得到的像素103的电流与预期的新目标电流值的差。该关系可以被表示为：
(公式6)
使用用ΔItarget(m)代替ΔIm的公式3还可以识别由像素103得到的供电电压的变化。例如，当m＝i时，因为ΔVi，i＝-i×r×ΔItargeg(i)，所以刷新之后的电流变化可以根据公式5以ΔIi，i＝-k×(VDATA(i)-VDD(i，i-1)-VTH)×ΔVi，i获得，其中，VDD(i，i-1)是由在位置i处的像素得到的在刷新该像素之前的电力供应线109的值。可以使用公式2并且替代当时在该列中的或者在连续地刷新列中的每个像素的实际电力供应线值来计算VDD(i，i-1)，可以在查找表中记录并且更新针对每个像素的VDD(i，i-1)。因此，可以识别由于像素103被刷新而产生的像素103的供电电压的变化和电流的变化。
然后，显示设备100可以识别像素103的在列C1-Cy中的其他像素103中的每个像素被刷新之后的预期电流值的变化。因此，如果在列C1-Cy中存在y个像素103，则可以存在被识别的y个预期电流变化。为了计算这些变化，例如，可以使用公式4或公式5。在刷新位置i处的像素之后，电路可以在时间间隔秒之后继续更新在位置i+1处的像素，其中，f是屏幕的刷新率。由于像素i+1的更新而产生的像素i的VDD变化可以通过ΔVi，i+1＝-i×r×ΔItarget(i+1)来获得，并且由于像素i+1的刷新而产生的像素i的电流的变化可以通过ΔIi，i+1＝-k×(VDATA(i)-VDD(i，i)-VTH)×ΔVi，i+1来确定。随着列中的像素保持刷新，继续更新像素n和像素1直到到达位置i-1处的像素为止，在位置i-1处的像素是在该刷新循环中的上一个像素。
在其他像素103中的每个像素被刷新的情况下识别电流变化时，显示设备100可以识别电流变化的平均值。这种关系可以例如使用以下公式确定为电流的平均值：
(公式7)
接下来，显示设备100识别待被施加到数据线116上的新亮度信号的值。使用公式7和以下关系，可以通过求解以下公式来识别像素103的VDATA的值：
Itarget(i)＝Iaverage(i) (公式8)
因此，可以识别在考虑像素103的IR压降和串扰的影响的情况下的亮度信号的值。可以将所识别的VDATA值施加至数据线116作为补偿亮度信号，并且可以刷新像素103。通过刷新显示设备100中的所有像素103的循环，像素103的平均电流可以与可以产生像素103的期望亮度的目标电流基本上相同。因此，观看者可以将像素103在视觉上感知为期望亮度。此外，可以使用如上所描述的相似过程来刷新其他像素103。列中的所有像素重复相同的步骤会补偿整列像素的IR压降。
因此，IR压降和串扰补偿方案通过如下述的预测来进行操作：该方案通过预测即将到来的数据线信号来了解每个像素的期望亮度。根据该零阶数据，该方案对由于由沿供电线的其他像素汲取(draw)的特定电流而在每个像素处产生的IR压降进行估计。根据该信息，计算或提供校正因子，该校正因子一旦被施加至数据信号时就会补偿由于所计算的IR压降而产生的亮度变化。因此，该方案产生了近似期望亮度的平均像素亮度。
为了证明，考虑4像素2T1C列AMOLED显示器例如图1中所示出的显示器(即y＝4)。假设供电电压线109的电压是10V，驱动晶体管206(图2)的阈值电压是-2.4V，栅极电介质的面积比电容(C)是30nF/cm2，晶体管的迁移率(μ)是5cm2/(V*s)，以及晶体管沟道宽度与沟道长度之比是10，其给出：
(公式9)
基于634μm×211μm像素尺寸(例如，针对55”、16:9长宽比和1920×1080分辨率屏幕的子像素尺寸)、600cd/m2屏幕亮度、10cd/A OLED效率以及30％孔径比，供应至每个像素的电流可以被计算为8μA。为了使用四个像素的电流说明对于供电电压线109的大的IR压降，假设在两个相邻像素之间的供电电压线109的电阻为500Ω。虽然该电阻与实际的供电电压线109的电阻相比会不切实际地高，但是高电阻使像素之间的IR压降显著。根据公式1，可以根据下述公式确定VDATA为6.5672V：
(公式10)
首先，考虑将VDATA＝6.5672V施加至全部四个像素的未补偿情况。由于供电电压线109的IR压降，所以由每个像素得到的实际VDD电压会不同，产生了不同的像素电流。在供电电压线109上的IR压降将通过像素1的电流降低了几乎3％，而像素4的电流降低了多于7％。表1提供了由于IR压降而产生的不同的值的示例。
表1
现在，考虑以上所描述的亮度补偿。因为考虑了在新的刷新循环处通过像素的电流变化，所以限定了电流的初始条件。初始电流的正常选择是未补偿情况，所以假设该列像素先前在没有任意补偿的情况下被驱动。新的刷新循环从刷新像素1开始。首先，可以根据公式6计算ΔItarget作为8μA的新目标电流与每个像素的先前电流之间的差。根据ΔItarget，可以基于公式3计算所有ΔVi，i值。然后，可以根据公式5来确定ΔIi，m。在此之前，有利的是可以基于公式2计算所有VDD(i，m-1)值。使用所有参数可以确定根据公式7的ΔIaverage(i)的表达式，并且通过求解公式8得到针对每个像素的合适的VDATA。基于上一次刷新循环计算每个像素的平均值。对于所有像素而言，发现偏差小于0.05％，如表2所示。
由于计算过程中的近似，在目标电流值与实际电流值之间存在有限的差。在信号稳定之后，该差不会进一步减小，这是因为目标电流值不会改变。例如，在对于随后刷新循环将目标电流保持为8μA的情况下，像素3会承载与8μA相对比的7.9972μA的电流。在实际应用中，这表示当显示在其中偏差会更能够察觉的静态图像时，在显示器中存在有限误差，该误差可能在这种近似的水平下不能被校正。在这种情况下，可以计算考虑多于一阶的近似的更精确解或者可以计算甚至准确解以实现更精确的显示。这最好在屏幕正显示静态图像时进行，这是因为感知集中会使偏差更易于感知。另外，可以分配计算能力资源以做出更精确的计算。另一方面，当显示器显示运动画面例如播放电影时，感知注意力被分散，因此每个单独帧中的有限误差不太可能被感知，这种显示器应当适当的做一阶近似。如果需要更少误差并且计算资源可利用，则也可以对运动画面显示器应用二阶计算或更高阶计算。
像素1 像素2 像素3 像素4
VDATA(V) 6.5516 6.5396 6.5314 6.5272
在行1刷新之后的像素电流(μA) 8.0054 7.5947 7.4826 7.427
在行2刷新之后的像素电流(μA) 8.0023 8.0108 7.4766 7.4212
在行3刷新之后的像素电流(μA) 7.994 7.9941 7.9972 8
在行4刷新之后的像素电流(μA) 7.994 7.9941 7.9972 8
在行5刷新之后的像素电流(μA) 7.9941 7.9972 8
在行6刷新之后的像素电流(μA) 7.9972 8
在行7刷新之后的像素电流(μA) 8
对于该循环的像素电流平均值(μA) 7.998925 7.998275 7.9972 8
相对于目标值的偏差(％) 0.0134375 0.0215625 0.035 0
表2
接下来参照图3，示出了根据本公开内容的各种实施方式的由显示设备100(图1)中的亮度控制器300(图4)实现的功能的示例的流程图。亮度控制器300可以包括例如处理装置和/或在处理装置中能够执行的逻辑。应该理解，图3的流程图仅提供可以被采用以实现如本文所描述的亮度控制器300的部分的操作的许多不同类型的功能布置的示例。作为替代，图3的流程图可以被视为描绘根据一个或更多个实施方式的在显示设备100中实现的方法的步骤的示例。
从框303开始，亮度控制器300识别像素103的第一亮度信号。第一亮度信号可以是例如先前用于刷新像素103的非补偿亮度信号的值。接下来，如框306中所示，至少部分地基于在框303中所识别的第一亮度信号来识别像素103的第一目标电流值。然后，亮度控制器300移动至框309并且至少部分地基于像素103的期望亮度来识别像素103的第二目标电流值。为此，亮度控制器300可以例如查询查找表或者计算第二目标电流值。移动至框313，亮度控制器300识别第一目标电流值与第二目标电流值之间的差。这种关系通过上文的公式6表示。
然后，如框316中所示，亮度控制器300识别响应于用第二目标电流值刷新像素103的像素103的预期供电电压的变化。然后，亮度控制器300移动至框319并且识别由于列C1-Cy中的其他像素103中的每个像素被刷新而产生像素103的预期电流值的变化。为此，亮度控制器300可以例如应用上文的公式4或公式5。接下来，如框323中所示，识别在列C1-Cy中的其他像素103中的每个像素被刷新之后像素103的平均预期电流值。亮度控制器300可以例如应用上文的公式7以识别平均预期电流值并且将其表示成第二亮度信号例如列中的每个像素103的VDATA的函数。
在框326中，亮度控制器300至少部分地基于所识别的预期电流值的平均变化来识别像素103的第二亮度信号，该预期电流值的平均变化是在框323中识别的。为此，可以采用公式8以计算亮度信号例如VDATA。在框329中，亮度控制器300将第二亮度信施加到用于像素103的数据线116上。之后该过程结束。由在显示设备100(图1)中的亮度控制器300(图4)实现的功能不依赖于工作的特定像素电路设计，因此其可以在下述各种电路设计中使用：其中IR压降对像素的列有影响同时可以计算由于IR压降产生的像素之间的相互作用。该亮度控制器可以在电压编程和电流编程的像素电路两者中工作。该亮度控制器可用于TFT背板或者其他晶体管使能背板，例如碳纳米管使能垂直有机发光晶体管(CN-VOLET)背板。
参考图4，示出了根据本公开内容的各种实施方式的显示设备100的示例的示意性框图。显示设备100包括例如具有处理器403和存储器406的至少一个处理器电路，处理器403和存储器406两者被耦接至本地接口409。本地接口409可以包括例如具有伴随地址/控制总线的数据总线或者可以理解的其他总线结构。
在存储器406中所存储的是能够由处理器403执行的数据和若干部件两者。特别地，在存储器406中所存储的并且能够由处理器403执行的可以是亮度控制器应用程序300a和潜在的其他应用程序。在本文所讨论的任意部件以软件形式实现的情况下，可以采用许多编程语言中的任意一种编程语言例如C、C++、C#、Objective C、Java、Javascript、Perl、PHP、Visual Basic、Python、Ruby、Delphi、Flash或其他编程语言。
可以将许多软件部件存储在存储器406中并且能够由处理器403执行。在这方面，术语“能够执行”表示以最终能够由处理器403运行的形式的程序文件。可执行程序的示例可以是例如：可以被翻译成以可以加载到存储器406的随机存取部分并且由处理器403运行的格式的机器代码的编译程序、可以以能够被加载到存储器406的随机存取部分并且由处理器403执行的适当格式例如目标代码表示的源代码、或者可以由另外的可执行程序译码以在存储器406的随机存取部分中生成待由处理器403执行的指令的源代码等。可执行程序可以存储在存储器406的任意部分或部件中，包括：例如，随机存取存储器(RAM)、只读存储器(ROM)、硬盘驱动器、固态驱动器、USB闪存驱动器、存储卡、光盘例如致密盘(CD)或数字多功能盘(DVD)、软盘、磁带或其他存储部件。
存储器406在本文中被限定为包括易失性和非易失性存储器以及数据存储部件两者。易失性部件是当断电时不保持数据的部件。非易失性部件是当断电时保持数据的部件。因此，存储器406可以包括：例如，随机存取存储器(RAM)、只读存储器(ROM)、硬盘驱动器、固态驱动器、USB闪存驱动器、经由存储卡阅读器存取的存储卡、经由相关联的软盘驱动器存取的软盘、经由光盘驱动器存取的光盘、经由适当的磁带驱动器存取的磁带、和/或其他存储部件、或这些存储部件中的任意两个或更多个的组合。另外，RAM可以包括：例如，静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、或者磁性随机存取存储器(MRAM)和其他这样的设备。ROM可以包括：例如，可编程只读存储器(PROM)、可擦除可编程只读存储器(EPROM)、电可擦除可编程只读存储器(EEPROM)、或其他类似存储设备。
此外，处理器403可以表示多个处理器403，并且存储器406可以表示在并行处理电路中分别操作的多个存储器406。在这样的情况下，本地接口409可以是促进下述之间的通信的合适的网络：多个处理器403中的任意两个处理器之间、任意处理器403与存储器406中的任一存储器之间、或者存储器406中的任意两个存储器之间等。本地接口409可以包括被设计成协调这种通信包括例如执行负载平衡的附加系统。处理器403可以具有电构造或者一些其他可利用的构造。
虽然亮度控制器300以及本文所描述的其他各种系统可以以以上所讨论的通用硬件执行的软件或代码实施，但是，作为替代，亮度控制器300以及本文所描述的其他各种系统还可以以在专用硬件、或者软件/通用硬件和专用硬件的组合实施。如果以专用硬件实施，则均可以实现为采用许多技术中的任意一种技术或许多技术的组合的电路或状态机。这些技术可以包括但是不限于：具有用于在应用一个或更多个数据信号时实现各种逻辑功能的逻辑门的分立逻辑电路；具有合适的逻辑门的特定应用集成电路、或其他部件等。这样的技术通常是本领域的技术人员众所周知的，并且因此，本文未详细描述。
图3的流程图示出了实现亮度控制器300的部分的功能和操作的示例。如果以软件实施，则每个块可以表示包括用于实现特定逻辑功能的编程指令的模块、部分或代码部分。编程指令可以以源代码的形式实施，该源代码包括用编程语言或机器代码编写的包括在计算机系统或其他系统中由合适的执行系统例如处理器403可识别的数值指令的人类可读语句。机器代码可以从源代码等转换。如果以硬件实施，则每个块可以表示实现特定逻辑功能的一个电路或许多互联的电路。
虽然图3的流程图示出了执行的特定顺序，但是应该理解，执行的顺序可以与所示出的顺序不同。例如，两个或更多个块的执行的顺序可以相对于所示出的顺序调换。此外，图3中连续示出的两个或更多个块可以同时执行或者部分同时执行。此外，在一些实施方式中，可以跳过或省略图3中示出的块中的一个或更多个块。另外，为了增强实用性、说明、性能测量或者提供故障排除帮助等，可以将任意数目的计数器、状态变量、报警信号机或消息添加至本文所描述的逻辑流程。应该理解，所有这样的变型都在本公开内容的范围内。
此外，本文所描述的包括软件或代码的任意逻辑或应用程序——包括亮度控制器应用程序300a——可以在计算机系统或其他系统中以由指令执行系统例如处理器403使用的或者结合指令执行系统例如处理器403使用的任意非暂态计算机可读介质实施。在这种意义上，逻辑可以包括例如语句，该语句包括可以从计算机可读介质获取并且可以由指令执行系统执行的指令和声明。在本公开内容的上下文中，“计算机可读介质”可以是可以包含、存储或保持本文所描述的用于由指令执行系统使用或结合指令执行系统使用的逻辑或应用程序的任意介质。计算机可读介质可以包括许多物理媒介中的任一媒介例如磁媒介、光学媒介或半导体媒介。合适的计算机可读介质的更多个特定示例可以包括但是不限于磁带、磁性软盘、磁性硬盘驱动器、存储卡、固态驱动器、USB闪存驱动器或光盘。此外，计算机可读介质可以是随机存储器(RAM)，包括：例如，静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、或者磁性随机存取存储器(MRAM)。另外，计算机可读介质可以是只读存储器(ROM)、可编程只读存储器(PROM)、可擦除可编程只读存储器(EPROM)、电可擦除可编程只读存储器(EEPROM)或其他类型的存储设备。
本公开内容的实施方式包括但不限于一种方法，所述方法包括：在显示设备中识别对于显示设备中的像素的IR压降效应，所述IR压降效应至少部分地基于由同一供电电压线供电的多个其他像素汲取的多个电流；以及在显示设备中至少部分地基于IR压降效应来生成用于所述像素的亮度信号，其中，所述亮度信号补偿IR压降效应。另一实施方式包括一种方法，所述方法包括：在显示设备中计算由于待由通过同一供电电压线供电的所有像素汲取的特定电流而产生的对于每个像素的IR压降的值，所述特定电流是以适合场景的必需像素亮度显示所述场景的下一特定帧所必需的；以及基于该计算向每个像素提供补偿IR压降的数据线信号，并且因此确保了适合所述场景的特定帧的必需的感知像素亮度。
亮度信号可以至少部分地基于响应于所述多个其他像素被刷新的所述像素的多个电流值的平均值。亮度信号可以为电压和/或电流。像素可以包括有机发光二极管(OLED)。显示设备可以包括有源矩阵有机发光二极管(AMOLED)面板。像素可以包括垂直发光晶体管。像素可以包括有源矩阵发光晶体管面板。特定像素的瞬时亮度可以随着共用供电电压线的其他像素被刷新而改变，同时基于计算由数据线信号设置的特定像素的平均感知亮度适合所述场景的特定帧。
要强调的是，以上所描述的本公开内容的实施方式仅是为了清楚理解公开内容的原理而阐述的实施方案的可能示例。可以在基本不背离公开内容的精神和原理的情况下对以上所描述的实施方式做出大量变型和修改。例如，本公开内容的各方面可以用于其他像素构造实现方案。例如，本公开内容的各方面可以用于使用集成驱动晶体管和光发射器的有源矩阵显示器，例如于2008年9月10日提交的题为“NANOTUBE ENABLED,GATE-VOLTAGECONTROLLED LIGHT EMITTING DIODES”的美国专利8,232,561和于2011年7月12日提交的题为“ACTIVE MATRIX DILUTE SOURCE ENABLED VERTICAL ORGANIC LIGHT EMITTINGTRANSISTOR”的WIPO公布WO/2012/078759中所描述的显示器，二者的全部内容通过引用合并至本文，或者本公开内容的各方面可以用于经受IR压降和串扰的任意可替代的像素设计。所有这样的修改和变型旨在包括在本文中。

Claims (20)

1.一种方法，包括：
在显示设备中识别对于所述显示设备中的由供电电压线供电的多个像素中的一个像素的IR压降效应，所述IR压降效应至少部分地基于在刷新所述多个像素中的其他像素期间由所述供电电压线供电的所述多个像素中的其他像素汲取的电流；以及
在所述显示设备中至少部分地基于所述IR压降效应来生成用于所述一个像素的亮度信号，其中，所述亮度信号补偿对于所述一个像素的所述IR压降效应。
2.根据权利要求1所述的方法，其中，所述亮度信号还至少部分地基于响应于所述其他像素被刷新而与所述一个像素相关联的多个电流值的平均值。
3.根据权利要求1所述的方法，其中，所述一个像素包括有机发光二极管。
4.根据权利要求1所述的方法，其中，所述显示设备包括有源矩阵有机发光二极管面板。
5.根据权利要求1所述的方法，其中，所述像素包括碳纳米管使能垂直有机发光晶体管。
6.根据权利要求1所述的方法，其中，识别所述IR压降效应还包括根据即将到来的数据线信号来估计所述一个像素因所述其他像素汲取的电流而产生的IR压降效应。
7.根据权利要求1所述的方法，其中，所述亮度信号为电压。
8.根据权利要求1所述的方法，其中，所述亮度信号为电流。
9.根据权利要求1所述的方法，其中，所述多个像素为所述显示设备中的像素矩阵的列的形式，并且识别所述一个像素上的IR压降效应基于在刷新周期期间由所述列中的其他像素中的每个像素汲取的电流。
10.一种用于驱动有源矩阵显示器的方法，包括下述步骤：
在显示设备中计算与由共用供电电压线供电的多个像素对应的IR压降的值，所述IR压降由于在刷新用于显示帧的所述多个像素中的每个像素期间由所述多个像素汲取的电流而产生；以及
向所述多个像素中的每个像素提供补偿所述IR压降的数据线信号，所述数据线信号至少部分地基于所述IR压降的值的至少一部分以及与所述帧的显示对应的像素亮度。
11.根据权利要求10所述的方法，其中，所述多个像素中的特定像素的瞬时亮度随着所述多个像素中的其他像素被刷新而改变。
12.根据权利要求11所述的方法，其中，所述像素亮度是限定时间间隔的平均像素亮度，所述平均像素亮度基于随着所述其他像素中的每个像素被刷新所述瞬时亮度的变化。
13.根据权利要求10所述的方法，其中，所述多个像素为像素矩阵的列的形式。
14.根据权利要求10所述的方法，其中，所述帧为一系列帧中的下一帧。
15.一种显示设备，包括：
像素矩阵，其包括由共用供电电压线供电的像素行；以及
亮度控制器，其被配置成：
确定对于所述像素行中的一行像素中的像素的IR压降效应，所述IR压降效应至少部分地基于在所述一行像素中的其他像素的刷新周期期间由所述一行像素中的其他像素汲取的电流；并且
至少部分地基于所述IR压降效应以及与所述像素相关联的平均像素亮度来生成用于所述像素的亮度信号。
16.根据权利要求15所述的显示设备，包括：包括所述像素矩阵的有源矩阵有机发光二极管面板。
17.根据权利要求15所述的显示设备，其中，所述像素行为所述像素矩阵的列。
18.根据权利要求15所述的显示设备，其中，所述像素包括碳纳米管使能垂直有机发光晶体管。
19.根据权利要求15所述的显示设备，其中，所述像素包括驱动晶体管，所述驱动晶体管被配置成至少部分地基于所述亮度信号来控制流过发光器件的电流的量。
20.根据权利要求15所述的显示设备，其中，所述亮度控制器包括能够由所述显示设备的处理电路执行的应用程序。
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