CN109754761B - Method and device for adjusting electrowetting display brightness along with change of ambient light - Google Patents
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Abstract
本发明涉及一种随环境光变化调整电润湿显示亮度的方法及装置，实时测量外界环境光，判断当前外界环境光是否属于预设的范围内，当外界环境光低于预设范围时，通过光源补偿调整外界环境光至预设的范围内；根据当前外界环境光，结合人眼感知系统，调整电润湿器件的显示亮度。本发明能够随环境光变化调整电润湿显示屏的亮度，能够保护人眼。
The invention relates to a method and a device for adjusting the brightness of electrowetting display with changes in ambient light. The external ambient light is measured in real time to determine whether the current external ambient light falls within a preset range. When the external ambient light is lower than the preset range, Adjust the external ambient light to a preset range through light source compensation; adjust the display brightness of the electrowetting device according to the current external ambient light, combined with the human eye perception system. The invention can adjust the brightness of the electro-wetting display screen with the change of ambient light, and can protect human eyes.
Description
技术领域technical field
本发明涉及电池测试领域，特别是一种随环境光变化调整电润湿显示亮度的方法及装置。The invention relates to the field of battery testing, in particular to a method and a device for adjusting the brightness of electrowetting display with changes in ambient light.
背景技术Background technique
近年来，电子纸显示器件因其观感效果类似于纸张，低功耗、环保等优点而备受关注。电润湿电子纸相较于电泳电子纸，同样能实现高亮度、高对比度、低能耗，且在响应速度上快于电泳电子纸，因而成为新一代电子纸显示器的重点研究方向。In recent years, electronic paper display devices have attracted much attention due to their appearance and feel similar to paper, low power consumption, environmental protection and other advantages. Compared with electrophoretic electronic paper, electrowetting electronic paper can also achieve high brightness, high contrast, low energy consumption, and has a faster response speed than electrophoretic electronic paper, so it has become the key research direction of a new generation of electronic paper displays.
电润湿电子纸显示器是一种反射式显示器，通过反射外界环境光，来达到显示的目的，因此不需要背光源，可以节省电力消耗。但也就更容易受到外界环境光的影响。当外界环境光较暗时，显示器屏幕也就较暗，甚至无法显示；当外界环境光很亮时，显示器屏幕也就较亮。这样的显示容易对人眼造成伤害，也限制了电润湿电子纸显示器的使用范围。The electrowetting electronic paper display is a kind of reflective display, which achieves the purpose of display by reflecting the external ambient light, so it does not need a backlight, which can save power consumption. But it is also more susceptible to the influence of external ambient light. When the external ambient light is dark, the display screen is also dark, or even cannot be displayed; when the external ambient light is bright, the display screen is also brighter. Such displays are easy to cause damage to human eyes, and also limit the application range of electrowetting electronic paper displays.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明的目的是提出一种随环境光变化调整电润湿显示亮度的方法及装置，能够随环境光变化调整电润湿显示屏的亮度，能够保护人眼。In view of this, the purpose of the present invention is to provide a method and device for adjusting the brightness of an electrowetting display with changes in ambient light, which can adjust the brightness of an electrowetting display with changes in ambient light and protect human eyes.
本发明采用以下方案实现：一种随环境光变化调整电润湿显示亮度的方法，实时测量外界环境光，判断当前外界环境光是否属于预设的范围内，当外界环境光低于预设范围时，通过光源补偿调整外界环境光至预设的范围内；根据当前外界环境光，结合人眼感知系统，调整电润湿器件的显示亮度。The present invention adopts the following scheme to realize: a method for adjusting the brightness of electrowetting display with the change of ambient light, measuring the external ambient light in real time, and judging whether the current external ambient light belongs to a preset range, and when the external ambient light is lower than the preset range When , the external ambient light is adjusted to a preset range through light source compensation; according to the current external ambient light, combined with the human eye perception system, the display brightness of the electrowetting device is adjusted.
进一步地，所述根据当前外界环境光，结合人眼感知系统，调整电润湿器件的显示亮度具体包括以下步骤：Further, the adjustment of the display brightness of the electrowetting device according to the current external ambient light in combination with the human eye perception system specifically includes the following steps:
步骤S1：确定所要显示图像的灰度级对应的亮度级Ld，以及用来区分弱环境光和强环境光的环境光阈值A；Step S1: determine the brightness level L d corresponding to the gray level of the image to be displayed, and the ambient light threshold A used to distinguish weak ambient light and strong ambient light;
步骤S2：采用人眼感知系统公式，得到标准环境下人眼视觉响应R；其中人眼感知系统公式为：Step S2: using the human eye perception system formula to obtain the human eye visual response R under the standard environment; wherein the human eye perception system formula is:
式中，α，β为常数(通常取值分别为0.69、5.83)；In the formula, α and β are constants (usually 0.69 and 5.83 respectively);
步骤S3：获得此时的环境光A'，通过人眼感知系统公式计算环境光A'对应的人眼视觉响应R'：Step S3: Obtain the ambient light A' at this time, and calculate the human visual response R' corresponding to the ambient light A' through the human eye perception system formula:
式中，
为保证人眼在不同的环境光下获得相同的人眼视觉响应，令R'＝R，通过人眼感知系统公式，得到环境光A'下所要显示图像灰度级对应的亮度级
步骤S4：查看要驱动的电润湿器件显示亮度随环境光及驱动电压DL-AL-V变化关系曲线，查询亮度级
本发明还提供了一种基于上文所述的随环境光变化调整电润湿显示亮度的方法的装置，包括电润湿显示屏、主控制器单元以及与其电性相连的光敏单元、亮度调整单元、图像显示灰度信息提取单元、驱动电压控制单元、光源补偿单元；The present invention also provides a device based on the above-mentioned method for adjusting the brightness of an electrowetting display with changes in ambient light, comprising an electrowetting display screen, a main controller unit, and a photosensitive unit electrically connected thereto, and a brightness adjustment a unit, an image display grayscale information extraction unit, a driving voltage control unit, and a light source compensation unit;
所述光敏单元与所述主控制器单元电性相连，用以检测外界环境光并将检测结果传输至主控制器单元；The photosensitive unit is electrically connected to the main controller unit for detecting external ambient light and transmitting the detection result to the main controller unit;
所述图像显示灰度信息提取单元与所述主控制器单元相连，用于提取当前显示图像的灰度亮度信息，并将提取到的信息传递至所述主控制器单元；The image display grayscale information extraction unit is connected to the main controller unit, and is used to extract the grayscale brightness information of the currently displayed image, and transmit the extracted information to the main controller unit;
所述光源补偿单元与所述主控制器单元电性相连，用于当外界环境光低于预设范围时，受主控制器单元控制将环境光调节至预设的范围；The light source compensation unit is electrically connected to the main controller unit, and is used for adjusting the ambient light to a preset range under the control of the main controller unit when the external ambient light is lower than the preset range;
所述亮度调整单元与所述主控制器单元电性相连，用于根据当前外界环境光，结合人眼感知系统，得到控制驱动电压；The brightness adjustment unit is electrically connected to the main controller unit, and is used for obtaining a control driving voltage according to the current external ambient light and in combination with the human eye perception system;
所述驱动电压控制单元与主控制器单元、电润湿显示屏电性相连，用以根据主控制器单元输入的控制驱动电压驱动电润湿显示屏的显示亮度。The driving voltage control unit is electrically connected with the main controller unit and the electrowetting display screen, and is used for driving the display brightness of the electrowetting display screen according to the control driving voltage input by the main controller unit.
进一步地，所述用于根据当前外界环境光，结合人眼感知系统，得到控制驱动电压具体为：所述亮度调整单元利用人眼感知系统计算当前环境光下所要显示图像灰度对应的亮度，并根据计算得到的亮度查询要驱动的电润湿器件显示亮度随环境光及驱动电压DL-AL-V变化关系曲线，最后得到对应的驱动电压。Further, the described method for obtaining the control driving voltage according to the current external ambient light in combination with the human eye perception system is specifically: the brightness adjustment unit uses the human eye perception system to calculate the brightness corresponding to the grayscale of the image to be displayed under the current ambient light, And according to the calculated brightness, query the relationship curve of the display brightness of the electrowetting device to be driven with the ambient light and the driving voltage DL-AL-V, and finally obtain the corresponding driving voltage.
与现有技术相比，本发明有以下有益效果：本发明能够根据环境的亮度来调整电润湿显示屏的显示亮度，能够有效保护人眼。Compared with the prior art, the present invention has the following beneficial effects: the present invention can adjust the display brightness of the electrowetting display screen according to the brightness of the environment, and can effectively protect human eyes.
附图说明Description of drawings
图1为本发明实施例的流程示意图。FIG. 1 is a schematic flowchart of an embodiment of the present invention.
图2为本发明实施例的原理框图。FIG. 2 is a principle block diagram of an embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图及实施例对本发明做进一步说明。The present invention will be further described below with reference to the accompanying drawings and embodiments.
应该指出，以下详细说明都是示例性的，旨在对本申请提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components, and/or combinations thereof.
如图1所示，本实施例提供了一种随环境光变化调整电润湿显示亮度的方法，实时测量外界环境光，判断当前外界环境光是否属于预设的范围内，当外界环境光低于预设范围时，通过光源补偿调整外界环境光至预设的范围内；根据当前外界环境光，结合人眼感知系统，调整电润湿器件的显示亮度。As shown in FIG. 1 , the present embodiment provides a method for adjusting the brightness of electrowetting display according to the change of ambient light, measures the external ambient light in real time, and judges whether the current external ambient light belongs to a preset range, and when the external ambient light is low When in the preset range, the external ambient light is adjusted to the preset range through light source compensation; according to the current external ambient light, combined with the human eye perception system, the display brightness of the electrowetting device is adjusted.
在本实施例中，所述根据当前外界环境光，结合人眼感知系统(HVS，Human VisualSystem)，调整电润湿器件的显示亮度具体包括以下步骤：In the present embodiment, the adjustment of the display brightness of the electrowetting device specifically includes the following steps according to the current external ambient light in combination with the Human Visual System (HVS, Human Visual System):
步骤S1：确定所要显示图像的灰度级对应的亮度级Ld，以及用来区分弱环境光和强环境光的环境光阈值A；其中，环境光阈值A可通过主观测试获得，也可基于感知失真因子(Dist)与人眼刚刚引起失真(JND)的阈值的关系。Step S1: Determine the brightness level L d corresponding to the gray level of the image to be displayed, and the ambient light threshold A used to distinguish weak ambient light and strong ambient light; Perceptual Distortion Factor (Dist) versus the threshold for just-induced distortion (JND) by the human eye.
基于亮度失真和对比度失真，定义感知失真因子Dist为：Based on luminance distortion and contrast distortion, the perceptual distortion factor Dist is defined as:
式中，d(x，y)表示在像素(x，y)处的感知失真；Dist表示整幅图像所有像素的失真的平均值，N是图像的像素数量，α和β是为了表征两者之间的相对重要性，在此设置为α＝β＝1，c(x，y)和l(x，y)为对比度失真和亮度失真。where d(x, y) represents the perceptual distortion at pixel (x, y); Dist represents the average distortion of all pixels in the entire image, N is the number of pixels in the image, α and β are used to characterize both The relative importance between α=β=1 is set here, and c(x, y) and l(x, y) are contrast distortion and luminance distortion.
式中，μin(x，y)和μout(x，y)分别是(x，y)周围像素点在室内和室外环境下的平均值，δin(x，y)和δout(x，y)是方差。环境光阈值是当Dist等于人眼刚刚引起的失真(JND)阈值时的光强度。where μ in (x, y) and μ out (x, y) are the average values of the pixels around (x, y) in indoor and outdoor environments, respectively, δ in (x, y) and δ out (x , y) is the variance. The ambient light threshold is the light intensity when Dist is equal to the just-induced distortion (JND) threshold of the human eye.
步骤S2：采用人眼感知系统公式，得到标准环境下人眼视觉响应R；其中人眼感知系统公式为：Step S2: using the human eye perception system formula to obtain the human eye visual response R under the standard environment; wherein the human eye perception system formula is:
式中，α，β为常数(通常取值分别为0.69、5.83)；In the formula, α and β are constants (usually 0.69 and 5.83 respectively);
步骤S3：获得此时的环境光A'，通过人眼感知系统公式计算环境光A'对应的人眼视觉响应R'：Step S3: Obtain the ambient light A' at this time, and calculate the human visual response R' corresponding to the ambient light A' through the human eye perception system formula:
式中，
为保证人眼在不同的环境光下获得相同的人眼视觉响应，令R'＝R，通过人眼感知系统公式，得到环境光A'下所要显示图像灰度级对应的亮度级
步骤S4：查看要驱动的电润湿器件显示亮度随环境光及驱动电压DL-AL-V变化关系曲线，查询亮度级
其中，所述DL-AL-V变化关系曲线通过实验或者已有的实验数据得到。Wherein, the DL-AL-V variation relationship curve is obtained through experiments or existing experimental data.
如图2所示，本实施例还提供了一种基于上文所述的随环境光变化调整电润湿显示亮度的方法的装置，包括电润湿显示屏、主控制器单元以及与其电性相连的光敏单元、亮度调整单元、图像显示灰度信息提取单元、驱动电压控制单元、光源补偿单元；As shown in FIG. 2 , this embodiment also provides a device for adjusting the brightness of an electrowetting display based on the above-mentioned method for adjusting the brightness of an electrowetting display with changes in ambient light, including an electrowetting display screen, a main controller unit, and electrical properties thereof. a connected photosensitive unit, a brightness adjustment unit, an image display grayscale information extraction unit, a driving voltage control unit, and a light source compensation unit;
所述光敏单元与所述主控制器单元电性相连，用以检测外界环境光并将检测结果传输至主控制器单元；The photosensitive unit is electrically connected to the main controller unit for detecting external ambient light and transmitting the detection result to the main controller unit;
所述图像显示灰度信息提取单元与所述主控制器单元相连，用于提取当前显示图像的灰度亮度信息，并将提取到的信息传递至所述主控制器单元；The image display grayscale information extraction unit is connected to the main controller unit, and is used to extract the grayscale brightness information of the currently displayed image, and transmit the extracted information to the main controller unit;
所述光源补偿单元与所述主控制器单元电性相连，用于当外界环境光低于预设范围(使显示屏可见亮度时的亮度)时，受主控制器单元控制将环境光调节至预设的范围；The light source compensation unit is electrically connected to the main controller unit, and is used to adjust the ambient light to a level controlled by the main controller unit when the ambient light is lower than a preset range (brightness when the display screen is visible). preset range;
所述亮度调整单元与所述主控制器单元电性相连，用于根据当前外界环境光，结合人眼感知系统，得到控制驱动电压；The brightness adjustment unit is electrically connected to the main controller unit, and is used for obtaining a control driving voltage according to the current external ambient light and in combination with the human eye perception system;
所述驱动电压控制单元与主控制器单元、电润湿显示屏电性相连，用以根据主控制器单元输入的控制驱动电压驱动电润湿显示屏的显示亮度。The driving voltage control unit is electrically connected with the main controller unit and the electrowetting display screen, and is used for driving the display brightness of the electrowetting display screen according to the control driving voltage input by the main controller unit.
在本实施例中，所述用于根据当前外界环境光，结合人眼感知系统，得到控制驱动电压具体为：所述亮度调整单元利用人眼感知系统计算当前环境光下所要显示图像灰度对应的亮度，并根据计算得到的亮度查询要驱动的电润湿器件显示亮度随环境光及驱动电压DL-AL-V变化关系曲线，最后得到对应的驱动电压。In this embodiment, the method for obtaining the control driving voltage according to the current external ambient light combined with the human eye perception system is specifically: the brightness adjustment unit uses the human eye perception system to calculate the corresponding grayscale of the image to be displayed under the current ambient light According to the calculated brightness, query the relationship curve of the display brightness of the electrowetting device to be driven with the ambient light and the driving voltage DL-AL-V, and finally obtain the corresponding driving voltage.
较佳的，在本实施例中，所述光源补偿单元可以采用任何光源，用以当外界环境光不够时增大环境亮度。Preferably, in this embodiment, the light source compensation unit can use any light source to increase the ambient brightness when the external ambient light is insufficient.
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.
以上所述，仅是本发明的较佳实施例而已，并非是对本发明作其它形式的限制，任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型，仍属于本发明技术方案的保护范围。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.
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