CN102376243B - 有源矩阵有机发光二极管显示器及控制其显示的方法 - Google Patents

有源矩阵有机发光二极管显示器及控制其显示的方法 Download PDF

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CN102376243B
CN102376243B CN201110225405.1A CN201110225405A CN102376243B CN 102376243 B CN102376243 B CN 102376243B CN 201110225405 A CN201110225405 A CN 201110225405A CN 102376243 B CN102376243 B CN 102376243B
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liquid crystal
cholesteric liquid
emitting diode
organic light
active matrix
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CN102376243A (zh
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金廷泫
金烔涉
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Samsung Electronics Co Ltd
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Abstract

本发明提供了一种有源矩阵有机发光二极管(AMOLED)显示器和一种控制该AMOLED显示器的显示的方法。AMOLED显示器包括输入单元、控制器和显示单元，显示单元通过在低功耗模式下启用控制器以截止AMOLED并导通胆甾相液晶显示器(LCD)来显示低功耗模式画面，并且通过在高画面品质模式下启用控制器以导通AMOLED并截止胆甾相LCD来显示高画面品质模式画面。当在室内环境下使用时，AMOLED显示器可以在高画面品质模式下操作，当在室外环境下或作为电子书阅读器使用时，AMOLED显示器可以在低功耗模式下操作。

Description

有源矩阵有机发光二极管显示器及控制其显示的方法
技术领域
本发明涉及一种有源矩阵有机发光二极管(AMOLED)显示器和一种控制该AMOLED的显示的方法。更具体地讲，本发明涉及一种可以在低功耗模式或高画面品质模式下操作的使用胆甾相液晶显示器(LCD)的AMOLED显示器和控制该AMOLED的显示的方法。
背景技术
如今，AMOLED显示器或液晶显示器(LCD)可广泛地用作移动终端或电子纸(e-paper)所用的显示器。更具体地讲，根据显示方法将LCD分为透射式LCD、反射式LCD或透反射式LCD。
因为透射式LCD使用背光、面板和线性偏振板，所以透射式LCD具有低效率的背光、消耗相对大量的电流并且具有低的室外可视性。无需利用外部光而显示画面的AMOLED显示器具有高的光学特性，但是消耗相对大量的功率。
反射式LCD使用外部光作为光源并且使用反射器、面板和圆偏振板，并且反射式LCD的反射率小于20％。因此，反射式LCD在室内可视性低且没有外部光的地方不能显示画面。反射式LCD使用胆甾相LCD，参照图1来描述现有技术的胆甾相CLD。
图1是示出了现有技术的胆甾相LCD的透视图。
参照图1，胆甾相LCD 10包括：吸收层11；第一胆甾相液晶颜色层12，在该第一胆甾相液晶颜色层12中，第一透明电极膜15附于其上表面；第二胆甾相液晶颜色层13，在该第二胆甾相液晶颜色层13中，第二透明电极膜16附于其上表面；第三胆甾相液晶颜色层14，在该第三胆甾相液晶颜色层14中，第三透明电极膜17附于其上表面。吸收层11、第一胆甾相液晶颜色层12、第二胆甾相液晶颜色层13和第三胆甾相液晶颜色层顺序地堆叠。在胆甾相LCD 10中，只有当胆甾相液晶颜色层12、13和14中的一层或更多层的状态改变时才需要耗电，因此，胆甾相LCD 10具有双稳定性、非常低的功耗、低的光学特性和慢的响应速度。
透反射式LCD通过在像素的一部分设置反射器而具有作为反射式LCD操作的部分和作为透射式LCD操作的其它部分，并且透反射式LCD具有需要透射特性略低于透射式LCD的透射特性且室外可视性略高于透射式LCD的室外可视性的结构。然而，由于反射器，导致透反射式LCD具有减小的开口率而使得亮度低，并且具有减小的色彩再现率。此外，为了获得期望的色彩再现率，将反射率限制为大约2％至5％，因此难以应用高规格的显示器并且难以应用AMOLED技术。此外，由于电子书(e-book)市场的扩张，使得对降低所需功耗进行进一步限制变得日益重要。
发明内容
本发明的多个方面在于至少解决上面提到的问题和/或缺点，并且在于至少提供下面描述的优点。因此，本发明的一方面在于提供一种有源矩阵有机发光二极管(AMOLED)显示器和一种控制该AMOLED的显示的方法，其中，当在室内环境下使用时或者当观看动态画面时，AMOLED显示器可以作为高画面品质的AMOLED进行操作，并且当在室外环境下使用时或者当作为电子书阅读器使用时，AMOLED显示器可以作为超低功耗的胆甾相液晶显示器(LCD)进行操作。
根据本发明的一方面，提供了一种包括输入单元和控制器的AMOLED显示器。该AMOLED显示器还包括显示单元，显示单元通过在低功耗模式下启用控制器以截止AMOLED并导通胆甾相LCD来显示低功耗模式画面，并且通过在高画面品质模式下启用控制器以导通AMOLED并截止胆甾相LCD来显示高画面品质模式画面。
优选地，显示单元包括胆甾相LCD，胆甾相LCD包括三层胆甾相液晶颜色层，即，堆叠在有源有机发光二极管的上表面的第一胆甾相液晶颜色层、堆叠在第一胆甾相液晶颜色层的上部的第二胆甾相液晶颜色层和堆叠在第二胆甾相液晶颜色层的上部的第三胆甾相液晶颜色层。
根据本发明的另一方面，提供了一种控制AMOLED显示器的显示的方法。所述方法包括以下步骤：通过输入单元输入低功耗模式和高画面品质模式中的一种；通过控制器确定输入的是低功耗模式和高画面品质模式中的哪一种；如果确定输入的是低功耗模式，则通过截止AMOLED并通过导通胆甾相LCD由显示单元显示低功耗模式画面；如果确定输入的是高画面品质模式，则通过导通AMOLED并通过截止胆甾相LCD由显示单元显示高画面品质模式画面。
对于本领域技术人员而言，通过下面的详细描述，本发明的其它方面、优点和显著特征将变得清楚，其中，下面的详细描述与附图结合公开了本发明的示例性实施例。
附图说明
通过下面结合附图进行的描述，特定示例性实施例的上述和其它方面、特征和优点将会变得更加明显，在附图中：
图1是示出了现有技术的胆甾相液晶显示器(LCD)的透视图；
图2是示出了根据本发明示例性实施例的有源矩阵有机发光二极管(AMOLED)显示器的显示单元的透视图；
图3是根据本发明示例性实施例的图2的显示单元的低功耗模式操作的图；
图4是示出了根据本发明示例性实施例的图2的显示单元的高画面品质模式操作的图；
图5是示出了根据本发明示例性实施例的AMOLED显示器的构造的框图；
图6是示出了根据本发明示例性实施例的控制图5的AMOLED显示器的显示的方法的流程图。
应当指出的是，在所有附图中，相似的标号用来描绘相同或相似的元件、特征和结构。
具体实施方式
提供下面参照附图的描述是为了帮助对通过权利要求及其等同物所限定的本发明示例性实施例的全面理解。下面的描述包括各种具体的细节是为了帮助理解，而这些应被认为仅仅是示例性的。因此，本领域普通技术人员应该认识到，在不脱离本发明的范围和精神的情况下，可以对在此描述的实施例进行各种变形和修改。此外，为了清晰和简洁起见，省略了对公知功能和构造的描述。
在以下的描述和权利要求书中使用的术语和词语不限于书面含义，而只是由发明人使用以使对本发明的理解清楚和一致。因此，对于本领域技术人员清楚的是，提供对本发明的示例性实施例的以下描述只是出于说明性的目的，而不是出于限制由权利要求及其等同物所限定的本发明的目的。
应该理解的是，除非上下文另外明确地指明，否则单数形式也包括复数表述。因此，例如，参照“组件表面”包括参照一个或多个这样的表面。
图2是示出了根据本发明示例性实施例的有源矩阵有机发光二极管(AMOLED)显示器的显示单元的透视图，图3是根据本发明示例性实施例的图2的显示单元的低功耗模式操作的图，图4是示出了根据本发明示例性实施例的图2的显示单元的高画面品质模式操作的图，图5是示出了根据本发明示例性实施例的AMOLED显示器的构造的框图。
参照图2和图5，描述根据本发明示例性实施例的AMOLED显示器。
AMOLED显示器包括输入单元51、控制器52和显示单元53。
输入单元51输入低功耗模式和高画面品质模式之一，并且输入单元51可以是用户可以通过其选择模式的触摸板或键盘，或者是可以自动选择模式的传感器。
控制器52从输入单元51接收低功耗模式输入信号或高画面品质模式输入信号，并且确定输入的是低功耗模式和高画面品质模式中的哪一种，如果输入的是低功耗模式则控制器52向显示单元53输出低功耗模式控制信号，而如果输入的是高画面品质模式则控制器52向显示单元53输出高画面品质模式控制信号。该示例性实施例的控制器可以形成为微处理器芯片。
显示单元53显示低功耗模式画面或高画面品质模式画面，并且包括AMOLED 21和胆甾相液晶显示器(LCD)28。
胆甾相LCD 28包括堆叠在AMOLED 21的上表面的第一胆甾相液晶颜色层22、堆叠在第一胆甾相液晶层22的上部的第二胆甾相液晶颜色层23和堆叠在第二胆甾相液晶颜色层23的上部的第三胆甾相液晶颜色层24。
参照图3，在本示例性实施例中，第一胆甾相液晶颜色层22选择性地反射或透射蓝色光38c，第二胆甾相液晶颜色层23选择性地反射或透射绿色光38b，第三胆甾相液晶颜色层24选择性地反射或透射红色光38a。然而，本发明不限于此，这三层胆甾相液晶颜色层22、23和24中的一层可以选择性地反射或透射红色光，另一层可以选择性地反射或透射绿色光，剩下的一层可以选择性的反射或透射蓝色光。
第一透明电极膜25附于第一胆甾相液晶颜色层22的上表面，第二透明电极膜26附于第二胆甾相液晶颜色层23的上表面，第三透明电极膜27附于第三胆甾相液晶颜色层24的上表面。第一透明电极膜25、第二透明电极膜26和第三透明电极膜27分别固定第一胆甾相液晶颜色层22、第二胆甾相液晶颜色层23和第三胆甾相液晶颜色层24，并且执行施加电压的功能以反射或透射期望的光。此外，在该示例性实施例中，透明电极膜25、26和27均由氧化铟锡(ITO)制成，并且它们的厚度优选地为0.05μm至0.12μm。
在低功耗模式下，AMOLED 21截止并执行与图1中的吸收层11的功能相同的功能。也就是说，因为仅用胆甾相液晶颜色层22、23和24不能表现黑色，所以应当存在用来表现黑色的吸收层，并且当不供电时，发光体不工作，因此，AMOLED 21理论上来讲完全变成黑色并且执行吸收光38d的吸收层的功能。此外，随着胆甾相LCD 28导通，第一胆甾相液晶颜色层22、第二胆甾相液晶颜色层23和第三胆甾相液晶颜色层24选择性地反射或透射蓝色光38c、绿色光38b和红色光38a。因此，AMOLED显示器可以作为低功耗胆甾相LCD进行操作。
参照图4，描述图2的显示单元53的高画面品质模式操作。在高画面品质模式下，随着胆甾相LCD 28截止，第一胆甾相液晶颜色层22、第二胆甾相液晶颜色层23和第三胆甾相液晶颜色层24继续透射未被过滤的所有颜色的光，即，所有的红色光48a、绿色光48b和蓝色光48c。此外，随着AMOLED21导通，供电，AMOLED 21因此被驱动。因为在发光体上涂覆一种膜(未示出)来形成AMOLED 21，所以当外部光强时，这种膜可以用作反射器。因此，为了防止强的外部光被反射，所以需要将圆偏振板附于其上部。在根据本示例性实施例的AMOLED显示器中，胆甾相液晶颜色层22、23和24可以执行圆偏振板的功能。更具体地讲，当胆甾相液晶晶元(cell)的厚度为14μm或更大时，右旋圆偏振光可以被全部反射，因此优选的是，胆甾相液晶颜色层22、23和24中的至少一层均具有14μm或更大的厚度。
根据本示例性实施例，通过在AMOLED 21的上部堆叠三个胆甾相液晶颜色层22、23和24，当在室内环境下使用时或者当观看动态画面时，AMOLED21可以作为高画面品质AMOLED来进行操作，并且当在室外环境下或者作为电子书阅读器使用时，AMOLED 21可以作为超低功耗的胆甾相LCD进行操作。此外，因为本示例性实施例的AMOLED 21具有用去除了吸收层的胆甾相LCD代替现有技术的AMOLED显示器的圆偏振板的结构，而不是现有技术的AMOLED显示器与现有技术的传统胆甾相LCD的简单组合，所以与现有技术的AMOLED显示器和现有技术的胆甾相LCD的简单组合相比，可以进一步减小AMOLED 21的厚度和成本。
图6是示出了根据本发明示例性实施例控制图5的AMOLED显示器的显示的方法的流程图。
参照图2至图6，描述根据本发明示例性实施例的使AMOLED显示器显示的方法。
首先，在步骤S1，通过输出单元51输入低功耗模式和高画面品质模式中的一种。
在步骤S2，控制器52确定输入的是否为低功耗模式。
如果确定输入的是低功耗模式，则在步骤S3，控制器52通过截止AMOLED 21并导通胆甾相LCD 28来控制显示单元53以低功耗模式显示。
如果确定没有输入低功耗模式，即，如果在步骤S2确定输入的是高画面品质模式，则在步骤S4，控制器52通过导通AMOLED 21并截止胆甾相LCD28来控制显示单元53以高画面品质模式显示。
以这种方式，在根据本示例性实施例的控制AMOLED显示器的显示的方法中，因为可以根据输入来显示低功耗模式画面或高画面品质模式画面，所以可以根据用户环境或用户观看的图像来显示适合模式的画面。
如上所述，根据本发明的示例性实施例，当在室内环境下使用时或者当观看动态画面时，AMOLED显示器可以作为高画面品质的AMOLED来进行操作，当在室外环境下或者作为电子书阅读器使用时，AMOLED显示器可以作为超低功耗的胆甾相LCD来进行操作。
虽然参照本发明的特定示例性实施例示出并描述了本发明，但是本领域技术人员应该理解，在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可以在此做出各种形式和细节上的改变。

Claims (9)

1.一种有源矩阵有机发光二极管显示器，所述有源矩阵有机发光二极管显示器包括输入单元、控制器和显示单元，
其中，显示单元包括有源矩阵有机发光二极管和胆甾相液晶显示器，显示单元通过在低功耗模式下启用控制器以截止有源矩阵有机发光二极管并导通胆甾相液晶显示器来显示低功耗模式画面，并且通过在高画面品质模式下启用控制器以导通有源矩阵有机发光二极管并截止胆甾相液晶显示器来显示高画面品质模式画面，
其中，有源矩阵有机发光二极管显示器不包括圆偏振板，
其中，胆甾相液晶显示器包括胆甾相液晶颜色层，所述胆甾相液晶颜色层执行圆偏振板的功能。
2.如权利要求1所述的有源矩阵有机发光二极管显示器，其中，包括在显示单元中的胆甾相液晶显示器包括三层胆甾相液晶颜色层，所述三层胆甾相液晶颜色层包括堆叠在有源矩阵有机发光二极管的上表面的第一胆甾相液晶颜色层、堆叠在第一胆甾相液晶颜色层的上部的第二胆甾相液晶颜色层和堆叠在第二胆甾相液晶颜色层的上部的第三胆甾相液晶颜色层。
3.如权利要求2所述的有源矩阵有机发光二极管显示器，其中，
用来固定第一胆甾相液晶颜色层并且用来施加电压的第一透明电极膜附于第一胆甾相液晶颜色层的上表面，
用来固定第二胆甾相液晶颜色层并且用来施加电压的第二透明电极膜附于第二胆甾相液晶颜色层的上表面，
用来固定第三胆甾相液晶颜色层并且用来施加电压的第三透明电极膜附于第三胆甾相液晶颜色层的上表面。
4.如权利要求2所述的有源矩阵有机发光二极管显示器，其中，所述三层胆甾相液晶颜色层中的一层选择性地反射或透射红色光，所述三层胆甾相液晶颜色层中的另一层选择性地反射或透射绿色光，所述三层胆甾相液晶颜色层中的剩下的一层选择性地反射或透射蓝色光。
5.如权利要求2所述的有源矩阵有机发光二极管显示器，其中，所述三层胆甾相液晶颜色层中的至少一层的厚度为14μm或大于14μm。
6.如权利要求1所述的有源矩阵有机发光二极管显示器，其中，控制器根据通过输入单元输入的用户选择来确定低功耗模式和高画面品质模式中的一种。
7.如权利要求1所述的有源矩阵有机发光二极管显示器，其中，控制器根据将要显示在有源矩阵有机发光二极管显示器上显示的内容来确定低功耗模式和高画面品质模式中的一种。
8.如权利要求1所述的有源矩阵有机发光二极管显示器，其中，控制器根据有源矩阵有机发光二极管显示器的使用环境来确定低功耗模式和高画面品质模式中的一种。
9.一种控制有源矩阵有机发光二极管显示器的显示的方法，所述方法包括以下步骤：
通过输入单元输入低功耗模式和高画面品质模式中的一种；
通过控制器确定输入的是低功耗模式和高画面品质模式中的哪一种；
如果确定输入的是低功耗模式，则通过截止有源矩阵有机发光二极管并通过导通胆甾相液晶显示器由显示单元显示低功耗模式画面；
如果确定输入的是高画面品质模式，则通过导通有源矩阵有机发光二极管并通过截止胆甾相液晶显示器由显示单元显示高画面品质模式画面，
其中，有源矩阵有机发光二极管显示器不包括圆偏振板，
其中，胆甾相液晶显示器包括胆甾相液晶颜色层，所述胆甾相液晶颜色层执行圆偏振板的功能。
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