CN104978934B - The flicker reduction method and electrophoretic display device (EPD) of electrophoretic display device (EPD) image switching - Google Patents
The flicker reduction method and electrophoretic display device (EPD) of electrophoretic display device (EPD) image switching Download PDFInfo
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- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
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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
- G09G3/34—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 by control of light from an independent source
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Abstract
本发明电泳显示器切换画面的闪烁减少方法及电泳显示器，所述方法包括：接收由像素点显示的目标灰阶信息；由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形；通过第一极端状态驱动信号将像素点由原始灰阶驱动到第一极端状态；通过第二极端状态驱动信号驱动像素点由第一极端状态转换至第二极端状态，然后施加直流平衡补偿驱动信号使电泳显示器保持直流平衡，再通过刷写新灰阶驱动信号将像素转换到目标灰阶；所述第二极端状态驱动信号的电压极性与直流平衡补偿驱动信号的电压极性相同；本发明通过优化驱动波形，将驱动波形各个阶段加以整合，可减少电泳显示设备显示屏的闪烁次数，提升电泳电子纸画面切换时的舒适度。
The method for reducing the flickering of the switching screen of the electrophoretic display and the electrophoretic display of the present invention, the method includes: receiving the target gray scale information displayed by the pixel point; determining the DC balance supplementary driving signal according to the new gray scale driving signal of the previous state of the pixel point driving waveform; the pixel point is driven from the original gray scale to the first extreme state through the first extreme state driving signal; the pixel point is driven from the first extreme state to the second extreme state through the second extreme state driving signal, and then DC is applied The balance compensation drive signal keeps the electrophoretic display DC balanced, and then converts the pixel to the target gray scale by writing a new gray scale drive signal; the voltage polarity of the second extreme state drive signal is the same as the voltage polarity of the DC balance compensation drive signal The same; the present invention integrates each stage of the driving waveform by optimizing the driving waveform, which can reduce the number of flickering of the display screen of the electrophoretic display device, and improve the comfort of the electrophoretic electronic paper screen switching.
Description
技术领域technical field
本发明涉及显示器技术领域，特别涉及电泳显示器切换画面的闪烁减少方法及电泳显示器。The invention relates to the technical field of displays, in particular to a flicker reducing method for switching images of an electrophoretic display and the electrophoretic display.
背景技术Background technique
EPD(电泳)电子纸：电泳电子纸已经成为一种非常重要的信息显示载体，目前已经广泛应用于电子书阅读器、电子标签、电子广告牌等，其具备了良好的双稳态特性，在静态显示时，几乎不耗电，是一种具备节能环保特色的显示技术。然而，电泳电子纸还存在一系列缺点，例如：响应速度较慢，画面显示质量不佳，画面切换时伴随着闪烁现象等；这些缺点严重影响了电泳电子纸显示效果，并制约了市场应用范围。电泳电子纸的灰阶显示，主要是由施加在像素电极上的电压序列驱动形成，这种电压序列被称之为驱动波形。而电泳电子纸显示时所表现出来的缺点，诸多是由驱动波形的不良设计所造成。EPD (electrophoresis) electronic paper: Electrophoretic electronic paper has become a very important information display carrier. It has been widely used in e-book readers, electronic tags, electronic billboards, etc., and it has good bistable characteristics. During static display, it consumes almost no power, which is a display technology with energy-saving and environmental protection characteristics. However, there are still a series of shortcomings in electrophoretic electronic paper, such as: slow response speed, poor picture display quality, flickering phenomenon when switching pictures, etc.; these shortcomings seriously affect the display effect of electrophoretic electronic paper and restrict the scope of market application . The grayscale display of electrophoretic electronic paper is mainly driven by the voltage sequence applied to the pixel electrode, and this voltage sequence is called the driving waveform. Many of the shortcomings displayed by electrophoretic electronic paper are caused by poor design of driving waveforms.
在电泳显示屏中，特定灰阶的显示没有固定的阈值电压，所以，需要利用驱动波形进行驱动像素显示灰阶。这个灰阶显示的过程，也是电场力驱动粒子电泳运动的过程。电泳粒子是电泳显示器的一个重要组成部分，在电泳显示的过程中，施加电压时，带电的黑色与白色粒子发生电泳效应，但对于所施加的电压时间长度，这种电泳效应是非线性的；因此，为了实现灰度的正确显示，必须选择一种恰当的驱动波形来驱动电泳粒子。典型的驱动波形包含三个阶段：擦除原始图像、激活电泳粒子和刷写新灰阶[46]。第二阶段结束时，就产生了反射率值相对稳定的白色灰阶，并以其作为参考灰阶，进一步驱动粒子形成目的灰阶。无论如何，这个驱动过程由于电压的转变，驱动粒子在微胶囊中不断更换电泳方向，并造成屏幕反射率的高、低转变，这种现象反应到人眼中，便是闪烁，对视觉的舒适性产生了不良的影响。所以，改善电泳显示屏驱动过程中的闪烁，对于电泳显示屏的应用具有积极意义。In the electrophoretic display screen, there is no fixed threshold voltage for the display of a specific gray scale, so it is necessary to use the driving waveform to drive the pixels to display the gray scale. This process of grayscale display is also the process of electrophoretic movement of particles driven by electric field force. Electrophoretic particles are an important part of electrophoretic displays. In the process of electrophoretic display, when a voltage is applied, the charged black and white particles undergo an electrophoretic effect, but this electrophoretic effect is nonlinear for the length of time of the applied voltage; therefore , in order to achieve the correct display of grayscale, an appropriate driving waveform must be selected to drive electrophoretic particles. A typical driving waveform consists of three stages: erasing the original image, activating electrophoretic particles, and writing new gray scales [46]. At the end of the second stage, a white gray scale with a relatively stable reflectance value is generated, which is used as a reference gray scale to further drive the particles to form the target gray scale. In any case, in this driving process, due to the change of voltage, the driving particles constantly change the electrophoretic direction in the microcapsules, and cause the high and low reflectivity of the screen to change. had adverse effects. Therefore, improving the flicker in the driving process of the electrophoretic display has positive significance for the application of the electrophoretic display.
目前，关于驱动波形闪烁处理的原理和设计方法，已经有很多报道Kao等（KAO WC, CHANG W T, YE J A. Driving waveform design based on response latencyanalysis of electrophoretic displays [J]. Display Technology, Journal of,2012, 8(10): 596-601.）提出了一种基于驱动波形形态变化的闪烁减少方法，但这种驱动波形并不遵守直流平衡的原理。Lu等（LU C M, WEY C L. A controller design formicro‐cup active‐matrix electrophoretic displays [J]. Journal of the Societyfor Information Display, 2012, 20(2): 103-108.）提出了一种最小化驱动波形查找表设计方法，以便于驱动波形可以存储在一个更小的内存中。然而，驱动波形的实质并未改进，闪烁的数量并不会减少。At present, there have been many reports on the principle and design method of driving waveform flicker processing Kao et al. (KAO WC, CHANG W T, YE J A. Driving waveform design based on response latency analysis of electrophoretic displays [J]. Display Technology, Journal of, 2012, 8(10): 596-601.) proposed a flicker reduction method based on the shape change of the driving waveform, but this driving waveform does not obey the principle of DC balance. Lu et al. (LU C M, WEY C L. A controller design formicro‐cup active‐matrix electrophoretic displays [J]. Journal of the Society for Information Display, 2012, 20(2): 103-108.) proposed a minimum The driving waveform look-up table is designed so that the driving waveform can be stored in a smaller memory. However, the nature of the driving waveform is not improved and the amount of flicker is not reduced.
一般来说，驱动波形应当可以快速的消除原始图像的影响并显示新图像。如果直流是不平衡的，则驱动会对显示屏造成损害，因此必须在驱动波形过程中保持直流平衡。在传统的驱动波形中，需要有三个阶段：擦除原始图像、激活粒子阶段（重置为黑色的状态并再次清除为白色状态）、刷写新灰阶。第二阶段占空比为50%。因此，这个阶段不会导致直流残留。只有其他两个阶段会导致直流不平衡，这两个阶段的驱动波形必须相互配合达到直流平衡的原理要求。图1为传统驱动波形示意图，如图1所示，若帧率为50帧/秒，则单位时间是1/50=20ms ，三个阶段的每一个波形持续时间在个必须是20ms整数倍。若要达到直流平衡，则必须满足方程(5-1)的要求。在驱动波形中的每个电压状态可以设置电压为15V、0V或-15V。Generally speaking, the driving waveform should be able to quickly eliminate the influence of the original image and display the new image. If the DC is unbalanced, the drive will cause damage to the display, so DC balance must be maintained during the drive waveform. In a traditional drive waveform, there are three phases: erasing the original image, activating the particle phase (resetting to a black state and clearing again to a white state), and flushing to a new gray scale. The duty cycle of the second stage is 50%. Therefore, this stage does not cause DC residual. Only the other two stages will cause DC unbalance, and the driving waveforms of these two stages must cooperate with each other to achieve the principle requirement of DC balance. Figure 1 is a schematic diagram of the traditional driving waveform. As shown in Figure 1, if the frame rate is 50 frames per second, the unit time is 1/50=20ms, and the duration of each waveform in the three stages must be an integer multiple of 20ms. To achieve DC balance, the requirements of Equation (5-1) must be met. Each voltage state in the drive waveform can be set to 15V, 0V or -15V.
te=tw (5-1)t e =t w (5-1)
一般来说，在频率很低的时候，黑色状态和白色状态之间的开关切换会产生闪烁，传统驱动波形的驱动过程如图2所示, 图2为由传统驱动波形所形成的电泳显示屏切换过程示意图；闪烁便发生在两个图像之间的切换过程中，因画面切换频率低于25Hz，所以这种闪烁可以为人眼所感知。在图2中，传统的驱动波形切换过程有4次闪烁，严重影响了阅读的舒适性。Generally speaking, when the frequency is very low, switching between the black state and the white state will cause flickering. The driving process of the traditional driving waveform is shown in Figure 2. Figure 2 is the electrophoretic display formed by the traditional driving waveform Schematic diagram of the switching process; flickering occurs during the switching process between two images. Since the screen switching frequency is lower than 25Hz, this kind of flickering can be perceived by human eyes. In Figure 2, there are 4 flashes in the traditional driving waveform switching process, which seriously affects the comfort of reading.
发明内容Contents of the invention
为解决上述技术问题，本发明的目的是提供电泳显示器切换画面的闪烁减少方法及电泳显示器。In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for reducing the flicker of switching screens of an electrophoretic display and an electrophoretic display.
本发明解决上述技术问题的技术方案如下：The technical scheme that the present invention solves the problems of the technologies described above is as follows:
一种电泳显示器切换画面的闪烁减少方法，电泳显示器中每一个像素电极对应一个像素点，在像素电极上施加驱动信号以实现目标灰阶显示，所述驱动信号包括：激活粒子驱动信号、直流平衡补偿驱动信号、刷写新灰阶驱动信号；所述激活粒子驱动信号包括第一极端状态驱动信号、第二极端状态驱动信号；该方法包括：A flicker reduction method for switching screens of an electrophoretic display. Each pixel electrode in the electrophoretic display corresponds to a pixel point, and a driving signal is applied to the pixel electrode to achieve a target grayscale display. The driving signal includes: an activated particle driving signal, a DC balance Compensating the driving signal and writing a new grayscale driving signal; the activated particle driving signal includes a first extreme state driving signal and a second extreme state driving signal; the method includes:
接收由像素点显示的目标灰阶信息；Receive target grayscale information displayed by pixels;
由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形；Determine the driving waveform of the DC balance supplementary driving signal from the new gray scale driving signal of the previous state of the pixel point;
通过第一极端状态驱动信号将像素点由原始灰阶驱动到第一极端状态；Driving the pixel point from the original gray scale to the first extreme state by using the first extreme state driving signal;
通过第二极端状态驱动信号驱动像素点由第一极端状态转换至第二极端状态，然后施加直流平衡补偿驱动信号使电泳显示器保持直流平衡，再通过刷写新灰阶驱动信号将像素转换到目标灰阶；Drive the pixel points from the first extreme state to the second extreme state through the second extreme state driving signal, then apply the DC balance compensation driving signal to keep the DC balance of the electrophoretic display, and then switch the pixel to the target by refreshing the new gray scale driving signal grayscale;
所述第二极端状态驱动信号的电压极性与直流平衡补偿驱动信号的电压极性相同。The voltage polarity of the driving signal in the second extreme state is the same as the voltage polarity of the DC balance compensation driving signal.
在上述技术方案的基础上，本发明还可以做如下的改进。On the basis of the above technical solutions, the present invention can also be improved as follows.
进一步，所述由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形，其具体为：由像素点前一状态的刷写新灰阶驱动信号的驱动波形的电压极性和驱动时长确定直流平衡补偿驱动信号的电压极性和驱动时长。Further, the determination of the driving waveform of the DC balance supplementary driving signal by the new gray-scale driving signal of the previous state of the pixel point is specifically: the driving waveform of the new gray-scale driving signal of the previous state of the pixel point The voltage polarity and driving duration determine the voltage polarity and driving duration of the DC balance compensation driving signal.
进一步，所述第一极端状态为黑色状态，所述第二极端状态为白色状态。Further, the first extreme state is a black state, and the second extreme state is a white state.
进一步，所述驱动信号为脉冲信号。Further, the driving signal is a pulse signal.
进一步，所述电泳显示设备为电泳电子纸。Further, the electrophoretic display device is electrophoretic electronic paper.
本发明还公开了一种电泳显示设备，所述电泳显示设备中包括至少一个像素点和至少一个像素点的驱动装置；每一个像素电极对应一个像素点，所述驱动装置通过在像素电极上施加驱动信号以实现目标灰阶显示；所述驱动装置施加的驱动信号包括：激活粒子驱动信号、直流平衡补偿驱动信号、刷写新灰阶驱动信号；所述激活粒子驱动信号包括第一极端状态驱动信号、第二极端状态驱动信号；The present invention also discloses an electrophoretic display device. The electrophoretic display device includes at least one pixel point and a driving device for at least one pixel point; each pixel electrode corresponds to a pixel point, and the driving device applies Drive signals to achieve the target grayscale display; the drive signals applied by the driving device include: activating particle driving signals, DC balance compensation driving signals, and refreshing new grayscale driving signals; the activating particle driving signals include the first extreme state driving signal, the second extreme state driving signal;
所述驱动装置接收由像素点显示的目标灰阶信息，由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形；The driving device receives the target grayscale information displayed by the pixel, and determines the driving waveform of the DC balance supplementary driving signal from the new grayscale driving signal of the previous state of the pixel;
所述驱动装置通过第一极端状态驱动信号将像素点由原始灰阶驱动到第一极端状态，通过第二极端状态驱动信号驱动像素点由第一极端状态转换至第二极端状态，然后施加直流平衡补偿驱动信号使电泳显示器保持直流平衡，再通过刷写新灰阶驱动信号将像素转换到目标灰阶；The driving device drives the pixel point from the original gray scale to the first extreme state through the first extreme state driving signal, drives the pixel point to switch from the first extreme state to the second extreme state through the second extreme state driving signal, and then applies DC The balanced compensation drive signal keeps the DC balance of the electrophoretic display, and then converts the pixel to the target gray scale by writing a new gray scale drive signal;
所述第二极端状态驱动信号的电压极性与直流平衡补偿驱动信号的电压极性相同。The voltage polarity of the driving signal in the second extreme state is the same as the voltage polarity of the DC balance compensation driving signal.
在上述技术方案的基础上，本发明还可以做如下改进。On the basis of the above technical solutions, the present invention can also be improved as follows.
进一步，所述由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形，其具体为：所述驱动装置由像素点前一状态的刷写新灰阶驱动信号的驱动波形的电压极性和驱动时长确定直流平衡补偿驱动信号的电压极性和驱动时长。Further, the drive waveform of the DC balance supplementary drive signal is determined by the new gray-scale driving signal of the previous state of the pixel point, which specifically includes: the driving device uses the new gray-scale drive signal of the previous state of the pixel point The voltage polarity and driving duration of the driving waveform determine the voltage polarity and driving duration of the DC balance compensation driving signal.
进一步，所述第一极端状态为黑色状态，所述第二极端状态为白色状态。Further, the first extreme state is a black state, and the second extreme state is a white state.
进一步，所述驱动信号为脉冲信号。Further, the driving signal is a pulse signal.
进一步，所述电泳显示设备为电泳电子纸。Further, the electrophoretic display device is electrophoretic electronic paper.
本发明的有益效果：本发明通过优化驱动波形，将驱动波形各个阶段加以整合，可以明显减少电泳显示设备显示屏的闪烁次数，提升了电泳电子纸画面切换时的舒适度。Beneficial effects of the present invention: the present invention integrates each stage of the drive waveform by optimizing the drive waveform, which can significantly reduce the number of flickering of the display screen of the electrophoretic display device, and improve the comfort of the electrophoretic electronic paper screen switching.
附图说明Description of drawings
图1为传统驱动波形示意图；Figure 1 is a schematic diagram of a traditional drive waveform;
图2为由传统驱动波形所形成的电泳显示屏切换过程示意图；Fig. 2 is a schematic diagram of the switching process of the electrophoretic display screen formed by the traditional driving waveform;
图3为本发明一种电泳显示器切换画面的闪烁减少方法流程示意图；FIG. 3 is a schematic flow chart of a method for reducing flicker in switching screens of an electrophoretic display according to the present invention;
图4为本发明一具体实施例的驱动波形设计示意图；Fig. 4 is a schematic diagram of driving waveform design according to a specific embodiment of the present invention;
图5为一组基于本发明所述方法的四级灰阶驱动波形示意图；Fig. 5 is a schematic diagram of a set of four-level grayscale driving waveforms based on the method of the present invention;
图6为一具体实施例中在驱动波形驱动下电泳显示屏画面更新过程示意图。Fig. 6 is a schematic diagram of an image updating process of an electrophoretic display screen driven by a driving waveform in a specific embodiment.
具体实施方式Detailed ways
以下结合附图对本发明的原理和特征进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
本发明一种电泳显示器切换画面的闪烁减少方法，电泳显示器中每一个像素电极对应一个像素点，在像素电极上施加驱动信号以实现目标灰阶显示，所述驱动信号包括：激活粒子驱动信号、直流平衡补偿驱动信号、刷写新灰阶驱动信号；所述激活粒子驱动信号包括第一极端状态驱动信号、第二极端状态驱动信号；该方法包括：The present invention relates to a flicker reduction method for switching screens of an electrophoretic display. Each pixel electrode in the electrophoretic display corresponds to a pixel point, and a driving signal is applied to the pixel electrode to realize target grayscale display. The driving signal includes: an activated particle driving signal, A DC balance compensation drive signal, and a new gray scale drive signal; the activated particle drive signal includes a first extreme state drive signal and a second extreme state drive signal; the method includes:
接收由像素点显示的目标灰阶信息；Receive target grayscale information displayed by pixels;
由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形；Determine the driving waveform of the DC balance supplementary driving signal from the new gray scale driving signal of the previous state of the pixel point;
通过第一极端状态驱动信号将像素点由原始灰阶驱动到第一极端状态；Driving the pixel point from the original gray scale to the first extreme state by using the first extreme state driving signal;
通过第二极端状态驱动信号驱动像素点由第一极端状态转换至第二极端状态，然后施加直流平衡补偿驱动信号使电泳显示器保持直流平衡，再通过刷写新灰阶驱动信号将像素转换到目标灰阶；Drive the pixel points from the first extreme state to the second extreme state through the second extreme state driving signal, then apply the DC balance compensation driving signal to keep the DC balance of the electrophoretic display, and then switch the pixel to the target by refreshing the new gray scale driving signal grayscale;
所述第二极端状态驱动信号的电压极性与直流平衡补偿驱动信号的电压极性相同。The voltage polarity of the driving signal in the second extreme state is the same as the voltage polarity of the DC balance compensation driving signal.
作为优选的实施方式，所述由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形，其具体为：由像素点前一状态的刷写新灰阶驱动信号的驱动波形的电压极性和驱动时长确定直流平衡补偿驱动信号的电压极性和驱动时长。As a preferred implementation manner, the drive waveform of the DC balance supplementary drive signal is determined by the new gray-scale drive signal of the previous state of the pixel point, which is specifically: the new gray-scale drive signal of the previous state of the pixel point The voltage polarity and driving duration of the driving waveform determine the voltage polarity and driving duration of the DC balance compensation driving signal.
下面以一具体实施例为例对本发明做进一步说明。The present invention will be further described below by taking a specific embodiment as an example.
在本具体实施例中，电泳显示设备为电泳电子纸，驱动信号为脉冲信号，脉冲信号的频率为50Hz，第一极端状态为黑色状态，第二极端状态为白色状态；图4为本发明一具体实施例的驱动波形设计示意图，如图4所示，在本具体实施例中，驱动波形分四个阶段，在第一阶段重置为黑色状态，白色状态形成于第二阶段，其被用作参考灰阶，所以，在白色状态形成后，利用负电压驱动的直流平衡补偿阶段则不会改变参考灰阶；在本发明具体实施例的驱动波形中，-15V、+15V之间的转换有两次，因此可以减少1次闪烁。根据伽马校正的原理，人类的眼睛在亮度低时对亮度转换比较敏感；在显示屏反射率变化过程中，驱动电压持续时间与灰阶其实一个非线性变化关系。所以，在刷写均匀的灰阶过程中，刷写新灰阶阶段的负电压持续时间并不能呈现线性缩短。In this specific embodiment, the electrophoretic display device is electrophoretic electronic paper, the driving signal is a pulse signal, the frequency of the pulse signal is 50 Hz, the first extreme state is a black state, and the second extreme state is a white state; FIG. The driving waveform design schematic diagram of the specific embodiment, as shown in Figure 4, in this specific embodiment, the driving waveform is divided into four stages, reset to the black state in the first stage, and the white state is formed in the second stage, which is used As a reference gray scale, so after the white state is formed, the reference gray scale will not be changed in the DC balance compensation stage driven by negative voltage; in the driving waveform of the specific embodiment of the present invention, the conversion between -15V and +15V There are two, so 1 flicker is reduced. According to the principle of gamma correction, human eyes are more sensitive to brightness conversion when the brightness is low; in the process of changing the reflectivity of the display screen, the driving voltage duration and the gray scale actually have a nonlinear relationship. Therefore, in the process of writing a uniform gray scale, the duration of the negative voltage in the phase of writing a new gray scale cannot be shortened linearly.
根据这一原则，以四级灰阶为例，图5为一组基于本发明所述方法的四级灰阶驱动波形示意图，如图5所示，图中，B代表黑色灰阶，DG代表深灰色灰阶，LG代表浅灰色灰阶，W代表白色灰阶。According to this principle, taking four-level gray scale as an example, Fig. 5 is a schematic diagram of a set of four-level gray-scale driving waveforms based on the method of the present invention. As shown in Fig. 5, in the figure, B represents black gray scale, and DG represents Dark gray grayscale, LG stands for light gray grayscale, W stands for white grayscale.
将上述驱动波形二进制文件下载到EPD(电泳)控制器驱动波形查找表中，并利用测试装置事实记录电泳显示屏的变化情况，在驱动过程中，EPD的图像转换过程如图6所示，图6为一具体实施例中在驱动波形驱动下电泳显示屏画面更新过程示意图,显示屏闪烁的次数减少到了三次，所以，采用本发明新型驱动波形可以改善EPD的阅读舒适性。Download the above drive waveform binary file to the drive waveform lookup table of the EPD (electrophoresis) controller, and use the test device to actually record the changes of the electrophoretic display screen. During the drive process, the image conversion process of the EPD is shown in Figure 6. 6 is a schematic diagram of the image updating process of the electrophoretic display screen driven by the driving waveform in a specific embodiment. The number of flashes of the display screen is reduced to three times. Therefore, the reading comfort of the EPD can be improved by using the new driving waveform of the present invention.
本发明所述方法可以明显减少电泳显示设备显示屏的闪烁次数，通过对比传统驱动波形，并依据两种类型粒子的一些驱动性能，将驱动波形各个阶段加以整合，减少电泳显示设备显示屏的闪烁次数，在驱动波形设计中，满足直流平衡要求新型驱动波形下载到EPD控制器中，并进行了性能测试，新型驱动波形与传统驱动波形的性能对比实验结果表明，新型驱动波形的性能比传统驱动波形明显减少了1次闪烁；本发明具体实施例使用了四级灰阶驱动波形作为例子来解释相关内容，但是本发明的驱动波形设计方法适用于多级灰阶驱动波形的设计。The method of the present invention can significantly reduce the flickering times of the display screen of the electrophoretic display device. By comparing the traditional driving waveforms and according to some driving properties of the two types of particles, the various stages of the driving waveforms are integrated to reduce the flickering of the display screen of the electrophoretic display device. Times, in the drive waveform design, the new drive waveform to meet the DC balance requirements was downloaded to the EPD controller, and the performance test was carried out. The experimental results of the performance comparison between the new drive waveform and the traditional drive waveform showed that the performance of the new drive waveform was better than that of the traditional drive. The waveform significantly reduces one flicker; the specific embodiment of the present invention uses the four-level gray-scale driving waveform as an example to explain the relevant content, but the driving waveform design method of the present invention is applicable to the design of multi-level gray-scale driving waveforms.
本发明还公开了一种电泳显示设备，所述电泳显示设备中包括至少一个像素点和至少一个像素点的驱动装置；每一个像素电极对应一个像素点，所述驱动装置通过在像素电极上施加驱动信号以实现目标灰阶显示；所述驱动装置施加的驱动信号包括：激活粒子驱动信号、直流平衡补偿驱动信号、刷写新灰阶驱动信号；所述激活粒子驱动信号包括第一极端状态驱动信号、第二极端状态驱动信号；The present invention also discloses an electrophoretic display device. The electrophoretic display device includes at least one pixel point and a driving device for at least one pixel point; each pixel electrode corresponds to a pixel point, and the driving device applies Drive signals to achieve the target grayscale display; the drive signals applied by the driving device include: activating particle driving signals, DC balance compensation driving signals, and refreshing new grayscale driving signals; the activating particle driving signals include the first extreme state driving signal, the second extreme state driving signal;
所述驱动装置接收由像素点显示的目标灰阶信息，由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形；The driving device receives the target grayscale information displayed by the pixel, and determines the driving waveform of the DC balance supplementary driving signal from the new grayscale driving signal of the previous state of the pixel;
所述驱动装置通过第一极端状态驱动信号将像素点由原始灰阶驱动到第一极端状态，通过第二极端状态驱动信号驱动像素点由第一极端状态转换至第二极端状态，然后施加直流平衡补偿驱动信号使电泳显示器保持直流平衡，再通过刷写新灰阶驱动信号将像素转换到目标灰阶；The driving device drives the pixel point from the original gray scale to the first extreme state through the first extreme state driving signal, drives the pixel point to switch from the first extreme state to the second extreme state through the second extreme state driving signal, and then applies DC The balanced compensation drive signal keeps the DC balance of the electrophoretic display, and then converts the pixel to the target gray scale by writing a new gray scale drive signal;
所述第二极端状态驱动信号的电压极性与直流平衡补偿驱动信号的电压极性相同。The voltage polarity of the driving signal in the second extreme state is the same as the voltage polarity of the DC balance compensation driving signal.
作为优选的实施方式，电泳显示设备为电泳电子纸，第一极端状态为黑色状态，第二极端状态为白色状态。驱动信号为脉冲信号，脉冲信号的频率为50Hz。As a preferred embodiment, the electrophoretic display device is electrophoretic electronic paper, the first extreme state is a black state, and the second extreme state is a white state. The driving signal is a pulse signal, and the frequency of the pulse signal is 50 Hz.
作为优选的实施方式，所述由像素点前一状态的刷写新灰阶驱动信号确定直流平衡补充驱动信号的驱动波形，其具体为：所述驱动装置由像素点前一状态的刷写新灰阶驱动信号的驱动波形的电压极性和驱动时长确定直流平衡补偿驱动信号的电压极性和驱动时长。As a preferred implementation manner, the drive waveform of the DC balance supplementary drive signal is determined by the new gray scale driving signal of the previous state of the pixel point, which is specifically: the driving device is refreshed by the refresh of the previous state of the pixel point The voltage polarity and driving duration of the driving waveform of the gray scale driving signal determine the voltage polarity and driving duration of the DC balance compensation driving signal.
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.
Claims (8)
- A kind of 1. flicker reduction method of electrophoretic display device (EPD) image switching, it is characterised in thatThe corresponding pixel of each pixel electrode in electrophoretic display device (EPD), apply drive signal on the pixel electrode to realize mesh Mark GTG shows that the drive signal includes：Activation particle drive signal, DC balance compensation drive signal, write with a brush dipped in Chinese ink new GTG Drive signal；The activation particle drive signal includes the first extremity drive signal, the second extremity drive signal；Should Method includes：Receive the target gray scale information shown by pixel；By the drive waveforms write with a brush dipped in Chinese ink new GTG drive signal and determine DC balance supplement drive signal of pixel previous state；Pixel is driven to the first extremity by original gray-scale by the first extremity drive signal；Pixel is driven to be changed by the first extremity to the second extremity, Ran Houshi by the second extremity drive signal DC balance compensation drive signal is added electrophoretic display device (EPD) is kept DC balance, then by writing with a brush dipped in Chinese ink new GTG drive signal by pixel Converting into target GTG；The polarity of voltage of the second extremity drive signal is identical with the polarity of voltage of DC balance compensation drive signal；The driving ripple write with a brush dipped in Chinese ink new GTG drive signal and determine DC balance supplement drive signal by pixel previous state Shape, it is specially：By the drive waveforms for writing with a brush dipped in Chinese ink new GTG drive signal of pixel previous state polarity of voltage and driving when The long polarity of voltage and driving duration for determining DC balance compensation drive signal.
- 2. a kind of flicker reduction method of electrophoretic display device (EPD) image switching according to claim 1, it is characterised in that described One extremity is black state, and second extremity is white states.
- A kind of 3. flicker reduction method of electrophoretic display device (EPD) image switching according to claim 1, it is characterised in that the drive Dynamic signal is pulse signal.
- A kind of 4. flicker reduction method of electrophoretic display device (EPD) image switching according to claim 1, it is characterised in that the electricity Swimming display device is electrophoretic electronic paper.
- A kind of 5. electro phoretic display device, it is characterised in that：The electro phoretic display device includes at least one pixel and at least The drive device of one pixel；The corresponding pixel of each pixel electrode, the drive device pass through in pixel electrode It is upper to apply drive signal to realize that target gray scale is shown；The drive signal that the drive device applies includes：Activate particle driving Signal, DC balance compensation drive signal, write with a brush dipped in Chinese ink new GTG drive signal；It is extreme that the activation particle drive signal includes first State actuation signal, the second extremity drive signal；The drive device receives the target gray scale information shown by pixel, is driven by the new GTG of writing with a brush dipped in Chinese ink of pixel previous state Dynamic signal determines the drive waveforms of DC balance supplement drive signal；The drive device is driven pixel to the first extremity by original gray-scale by the first extremity drive signal, Drive pixel to be changed by the first extremity to the second extremity by the second extremity drive signal, then apply straight Mobile equilibrium compensation drive signal makes electrophoretic display device (EPD) keep DC balance, then is changed pixel by writing with a brush dipped in Chinese ink new GTG drive signal To target gray scale；The polarity of voltage of the second extremity drive signal is identical with the polarity of voltage of DC balance compensation drive signal；The driving ripple write with a brush dipped in Chinese ink new GTG drive signal and determine DC balance supplement drive signal by pixel previous state Shape, it is specially：The drive device by pixel previous state the drive waveforms for writing with a brush dipped in Chinese ink new GTG drive signal voltage Polarity and driving duration determine the polarity of voltage and driving duration of DC balance compensation drive signal.
- 6. a kind of electro phoretic display device according to claim 5, it is characterised in that first extremity is black powder State, second extremity are white states.
- 7. a kind of electro phoretic display device according to claim 5, it is characterised in that the drive signal is pulse signal.
- 8. a kind of electro phoretic display device according to claim 5, it is characterised in that the electro phoretic display device is electrophoretic electronic Paper.
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| CN104978934B (en) * | 2015-06-24 | 2018-03-09 | 深圳市国华光电科技有限公司 | The flicker reduction method and electrophoretic display device (EPD) of electrophoretic display device (EPD) image switching |
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| CN108154851B (en) | 2016-12-02 | 2020-08-11 | 元太科技工业股份有限公司 | Sequence controller circuit of electronic paper display device |
| WO2018165509A1 (en) * | 2017-03-09 | 2018-09-13 | E Ink Corporation | Drivers providing dc-balanced refresh sequences for color electrophoretic displays |
| CN107068071A (en) * | 2017-05-16 | 2017-08-18 | 华南师范大学 | A kind of electrophoretic display device (EPD) weakens the method and system of texture |
| CN110782847B (en) * | 2018-01-22 | 2021-05-18 | 青岛海信移动通信技术股份有限公司 | Page refreshing method and device for ink screen |
| CN110111714A (en) * | 2019-04-16 | 2019-08-09 | 福建华佳彩有限公司 | A kind of display apparatus for commercial use source electrode walks the compensation method of line voltage |
| CN110890072A (en) * | 2019-12-04 | 2020-03-17 | 中山大学 | Self-powered electronic paper drive circuit and electronic paper display equipment |
| CN111402819B (en) * | 2020-04-26 | 2021-09-21 | 华南师范大学 | Electrowetting display driving system, method and apparatus |
| CN113376920B (en) * | 2021-05-26 | 2022-09-30 | 中山职业技术学院 | Three-color electrophoresis electronic paper particle quick response method and display screen |
| CN113689826B (en) * | 2021-08-24 | 2022-12-20 | 京东方科技集团股份有限公司 | A driving method of electronic paper, electronic paper and storage medium |
| CN119325626A (en) * | 2022-06-28 | 2025-01-17 | 华为技术有限公司 | Solid-state imaging device with tunable conversion gain, driving method, and electronic device |
| CN115346496A (en) * | 2022-08-16 | 2022-11-15 | 广州文石信息科技有限公司 | Screen display method, device and equipment based on frame rate and storage medium |
| CN116312394B (en) * | 2022-12-30 | 2025-08-01 | 江西兴泰科技股份有限公司 | Method and system for adjusting EPD display gray scale |
| CN119007658B (en) * | 2023-05-19 | 2025-10-21 | 京东方科技集团股份有限公司 | Display panel driving method, driving device and display device |
| CN119132249B (en) * | 2024-11-11 | 2025-02-11 | 深圳市正通仁禾科技有限公司 | Flexible electrophoresis display method and device based on pixel correction and electronic equipment |
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Effective date of registration: 20240613 Address after: 518000 b715, Yinxing technology building, 1301 Guanlan community sightseeing Road, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Country or region after: China Address before: 518110 703-1, 7th floor, No. 1301-1, sightseeing Road, dabuxiang community, Longhua New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Country or region before: China Patentee before: SOUTH CHINA NORMAL University Patentee before: ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS |
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Application publication date: 20151014 Assignee: Guangxian Technology (Guangdong) Co.,Ltd. Assignor: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Contract record no.: X2024980014574 Denomination of invention: The method of reducing flicker during screen switching in electrophoretic displays and electrophoretic displays Granted publication date: 20180309 License type: Exclusive License Record date: 20240910 |