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CN113534989B - Electronic paper display and driving method thereof - Google Patents

Electronic paper display and driving method thereof Download PDF

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CN113534989B
CN113534989B CN202010290875.5A CN202010290875A CN113534989B CN 113534989 B CN113534989 B CN 113534989B CN 202010290875 A CN202010290875 A CN 202010290875A CN 113534989 B CN113534989 B CN 113534989B
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CN113534989A (en
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柳文斌
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E Ink Holdings Inc
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • 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
    • 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
    • G09G3/344—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 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices

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  • Molecular Biology (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
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Abstract

本发明提供一种电子纸显示器及其驱动方法。电子纸显示器包括电子纸显示面板、触控面板以及处理电路。电子纸显示面板用以显示背景为第一颜色的显示画面。触控面板与电子纸显示面板整合设置，并且用以输出当前触控的第一触控坐标。处理电路用以驱动电子纸显示面板显示具有第二颜色且对应于第一触控坐标与先前触控坐标之间的第一触控轨迹。处理电路还依据第一触控轨迹与先前触控轨迹来驱动电子纸显示面板显示具有第三颜色的预测轨迹。

Figure 202010290875

The invention provides an electronic paper display and a driving method thereof. An electronic paper display includes an electronic paper display panel, a touch panel and a processing circuit. The electronic paper display panel is used for displaying a display image whose background is the first color. The touch panel is integrated with the electronic paper display panel, and is used to output the first touch coordinates of the current touch. The processing circuit is used to drive the electronic paper display panel to display a first touch track with a second color corresponding to the first touch coordinate and the previous touch coordinate. The processing circuit also drives the electronic paper display panel to display a predicted track with a third color according to the first touch track and the previous touch track.

Figure 202010290875

Description

电子纸显示器及其驱动方法Electronic paper display and its driving method

技术领域technical field

本发明涉及一种显示技术，尤其涉及一种电子纸显示器及其驱动方法。The invention relates to a display technology, in particular to an electronic paper display and a driving method thereof.

背景技术Background technique

电子纸显示器是一种新型的显示设备，具有轻薄、耐用及符合节能环保的低耗电等优点，市面上已广泛运用于电子阅读器(例如，电子书、电子报纸)或其他电子组件(例如，电子标签)。E-paper display is a new type of display device, which has the advantages of thinness, durability, energy saving and environmental protection, and low power consumption. It has been widely used in e-readers (such as e-books, e-newspapers) or other electronic components (such as ,Electronic tags).

在一些应用上，可通过整合电子纸显示面板以及触控面板的功能，以使用户能够通过电子纸显示器达到触控以及显示触控结果的效果。举例来说，用户可利用触控媒介(例如，触控笔或手指)来对触控面板进行书写动作，以将此书写内容显示于显示面板中。值得一提的是，现有技术通常会根据前一时间点的先前触控轨迹，以预测触控媒介于下一时间点于触控面板上的触控轨迹，藉以提早显示触控媒介所描绘的线段，进而降低书写时的延迟时间。In some applications, the functions of the electronic paper display panel and the touch panel can be integrated so that the user can touch the electronic paper display and display the touch result. For example, the user can use a touch medium (eg, a stylus or a finger) to perform a writing action on the touch panel, so as to display the written content on the display panel. It is worth mentioning that the existing technology usually predicts the touch track of the touch media on the touch panel at the next time point based on the previous touch track at the previous time point, so as to display the touch media in advance. The line segment, thereby reducing the delay time when writing.

对此，在显示面板以白色作为显示背景的前提下，现有的电子纸显示器会将所预测的触控轨迹以黑色线段的表示方式来显示于显示面板中。而当所预测的触控轨迹与实际的触控轨迹不相同时，会再将所显示的预测触控轨迹进一步地转换为白色。In this regard, on the premise that the display panel uses white as the display background, the existing electronic paper display will display the predicted touch track on the display panel in the form of black line segments. And when the predicted touch track is different from the actual touch track, the displayed predicted touch track will be further converted into white.

然而，在将预测错误的触控轨迹从黑色转换为白色的过程中，对于电子纸显示面板的特性而言，将会花费较长的处理时间。并且，若预测触控轨迹以黑色的表示方式显示于显示面板上，亦会影响用户的观看质量。因此，如何有效地降低处理预测错误的触控轨迹的时间，并且提升显示面板的显示质量，将是本领域相关技术人员重要的课题。However, in the process of converting an incorrectly predicted touch trace from black to white, it will take a long processing time due to the characteristics of the electronic paper display panel. Moreover, if the predicted touch track is displayed on the display panel in black, it will also affect the viewing quality of the user. Therefore, how to effectively reduce the time for processing the incorrectly predicted touch track and improve the display quality of the display panel will be an important task for those skilled in the art.

发明内容Contents of the invention

本发明提供一种电子纸显示器及其驱动方法，可有效地降低处理预测错误的触控轨迹的时间，并提升电子纸显示面板的显示质量。The present invention provides an electronic paper display and a driving method thereof, which can effectively reduce the time for processing an incorrectly predicted touch track and improve the display quality of the electronic paper display panel.

根据本发明的实施例，电子纸显示器包括电子纸显示面板、触控面板以及处理电路。电子纸显示面板用以显示背景为第一颜色的显示画面。触控面板与电子纸显示面板整合设置，并且用以输出当前触控的第一触控坐标。处理电路耦接电子纸显示面板以及触控面板，并且用以驱动电子纸显示面板显示具有第二颜色且对应于第一触控坐标与先前触控坐标之间的第一触控轨迹。处理电路还依据第一触控轨迹与先前触控轨迹来驱动电子纸显示面板显示具有第三颜色的预测轨迹。According to an embodiment of the present invention, an electronic paper display includes an electronic paper display panel, a touch panel, and a processing circuit. The electronic paper display panel is used for displaying a display image whose background is the first color. The touch panel is integrated with the electronic paper display panel, and is used to output the first touch coordinates of the current touch. The processing circuit is coupled to the electronic paper display panel and the touch panel, and is used to drive the electronic paper display panel to display a first touch track with a second color corresponding to the first touch coordinate and the previous touch coordinate. The processing circuit also drives the electronic paper display panel to display a predicted track with a third color according to the first touch track and the previous touch track.

根据本发明的实施例，电子纸显示器的驱动方法，包括：通过电子纸显示面板显示背景为第一颜色的显示画面；通过触控面板输出当前触控的第一触控坐标；驱动电子纸显示面板显示具有第二颜色且对应于第一触控坐标与先前触控坐标之间的第一触控轨迹；以及依据第一触控轨迹与先前触控轨迹来驱动电子纸显示面板显示具有第三颜色的预测轨迹。According to an embodiment of the present invention, the driving method of an electronic paper display includes: displaying a display screen with a background of the first color through the electronic paper display panel; outputting the first touch coordinates of the current touch through the touch panel; driving the electronic paper display The panel displays a second color and corresponds to a first touch track between the first touch coordinates and the previous touch coordinates; and drives the electronic paper display panel to display a third color according to the first touch track and the previous touch track. The predicted trajectory of the color.

基于上述，本发明诸实施例所述电子纸显示器及其驱动方法可以对触控媒介在触控面板上的触控轨迹进行预测，并且将所预测的触控轨迹以灰阶的表示方式显示于电子纸显示面板。如此一来，本发明的电子纸显示面板所显示的预测触控轨迹较不易使用户的眼睛察觉，进而提升用户的观看质量。并且，本发明更能够有效地降低处理预测错误的触控轨迹的时间。Based on the above, the electronic paper display and its driving method described in the embodiments of the present invention can predict the touch track of the touch medium on the touch panel, and display the predicted touch track in a grayscale representation on the Electronic paper display panel. In this way, the predicted touch trajectory displayed on the electronic paper display panel of the present invention is less likely to be perceived by the user's eyes, thereby improving the viewing quality of the user. Moreover, the present invention can more effectively reduce the time for processing the incorrectly predicted touch track.

附图说明Description of drawings

包含附图以便进一步理解本发明，且附图并入本说明书中并构成本说明书的一部分。附图说明本发明的实施例，并与描述一起用于解释本发明的原理。The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain principles of the invention.

图1是依照本发明一实施例的电子纸显示器的框图；FIG. 1 is a block diagram of an electronic paper display according to an embodiment of the present invention;

图2是依照本发明一实施例的电子纸显示器的驱动方法的流程图；2 is a flowchart of a driving method of an electronic paper display according to an embodiment of the present invention;

图3是依照本发明一实施例关于电子纸显示面板显示预测轨迹的触控显示情境的示意图；FIG. 3 is a schematic diagram of a touch display scenario of displaying a predicted trajectory on an electronic paper display panel according to an embodiment of the present invention;

图4是依照本发明一实施例说明图1所示的处理电路的操作流程图；FIG. 4 is a flowchart illustrating the operation of the processing circuit shown in FIG. 1 according to an embodiment of the present invention;

图5是依照本发明一实施例说明当第二触控轨迹与预测轨迹相同时的触控显示情境的示意图；5 is a schematic diagram illustrating a touch display situation when the second touch track is the same as the predicted track according to an embodiment of the present invention;

图6是依照本发明一实施例说明当第二触控轨迹与预测轨迹不同时的触控显示情境的示意图。FIG. 6 is a schematic diagram illustrating a touch display situation when the second touch trajectory is different from the predicted trajectory according to an embodiment of the present invention.

具体实施方式Detailed ways

为了使本发明的内容可以被更容易明了，以下特举实施例作为本发明确实能够据以实施的范例。另外，凡可能之处，在附图及实施方式中使用相同标号的组件/构件/步骤，是代表相同或类似部件。In order to make the content of the present invention more comprehensible, the following specific embodiments are taken as examples in which the present invention can be implemented. In addition, wherever possible, components/members/steps with the same reference numerals in the drawings and embodiments represent the same or similar components.

图1是依照本发明一实施例的电子纸显示器100的框图。请参照图1，电子纸显示器100包括处理电路110、触控面板120以及电子纸显示面板130。在本实施例中，触控面板120可以与电子纸显示面板130整合设置，并且触控面板120可以重叠于电子纸显示面板130的下方，但本发明并不限于此。FIG. 1 is a block diagram of an electronic paper display 100 according to an embodiment of the invention. Referring to FIG. 1 , the electronic paper display 100 includes a processing circuit 110 , a touch panel 120 and an electronic paper display panel 130 . In this embodiment, the touch panel 120 can be integrated with the electronic paper display panel 130 , and the touch panel 120 can be overlapped under the electronic paper display panel 130 , but the invention is not limited thereto.

其中，触控面板120可例如是电磁感应式(Electro Magnetic Resonance，EMR)或电容感应式的触控面板，但本发明并不限于此。触控面板120可以依据触控媒介(例如，触控笔或手指)的触控行为以产生触控结果，进而对处理电路110进行报点的操作动作。Wherein, the touch panel 120 can be, for example, an electromagnetic induction (Electro Magnetic Resonance, EMR) or capacitive induction touch panel, but the present invention is not limited thereto. The touch panel 120 can generate a touch result according to the touch behavior of the touch medium (eg, a stylus or a finger), and then perform an operation action of reporting points to the processing circuit 110 .

在本实施例中，电子纸显示面板130包括多个像素，并且这些像素分别对应于数组排列的多个电泳单元。这些电泳单元例如是微杯结构(Microcup)，并且具有两种颜色的电泳粒子(例如，白色电泳粒子以及黑色电泳粒子，但本发明并不限于此)。In this embodiment, the electronic paper display panel 130 includes a plurality of pixels, and these pixels respectively correspond to a plurality of electrophoretic units arranged in an array. These electrophoretic units are, for example, microcups, and have electrophoretic particles of two colors (eg, white electrophoretic particles and black electrophoretic particles, but the present invention is not limited thereto).

另一方面，在本实施例中，处理电路110耦接于触控面板120以及电子纸显示面板130之间。处理电路110可依据所述触控结果产生驱动信号至电子纸显示面板130，以驱动在这些电泳单元中的多个电泳粒子。在本实施例中，处理电路110通过施加电压的方式来驱动这些电泳粒子在这些电泳单元中移动，以使电子纸显示面板130的各个像素可分别显示黑色、白色、灰阶或特定颜色。On the other hand, in this embodiment, the processing circuit 110 is coupled between the touch panel 120 and the electronic paper display panel 130 . The processing circuit 110 can generate a driving signal to the electronic paper display panel 130 according to the touch result, so as to drive a plurality of electrophoretic particles in the electrophoretic units. In this embodiment, the processing circuit 110 drives the electrophoretic particles to move in the electrophoretic units by applying a voltage, so that each pixel of the electronic paper display panel 130 can display black, white, grayscale or a specific color.

详细来说，在本实施例中，电子纸显示面板130的单一像素可以包括上电极层、多个电泳单元以及驱动基板。这些电泳单元可被配置在上电极层以及驱动基板之间，并且这些电泳单元的显示侧靠近于上电极层。其中，所述上电极层可例如是透明电极层，而所述驱动基板可例如包括驱动晶体管。并且，所述驱动基板可通过驱动晶体管来接收由处理电路110所提供的驱动信号，以驱动白色电泳粒子以及黑色电泳粒子在这些电泳单元中移动。In detail, in this embodiment, a single pixel of the electronic paper display panel 130 may include an upper electrode layer, a plurality of electrophoretic units and a driving substrate. These electrophoretic units may be arranged between the upper electrode layer and the driving substrate, and the display sides of the electrophoretic units are close to the upper electrode layer. Wherein, the upper electrode layer may be, for example, a transparent electrode layer, and the driving substrate may, for example, include a driving transistor. Moreover, the driving substrate can receive the driving signal provided by the processing circuit 110 through the driving transistor, so as to drive the white electrophoretic particles and the black electrophoretic particles to move in the electrophoretic units.

举例来说，在本实施例中，白色电泳粒子可例如是带负电，而黑色电泳粒子可例如是带正电。当所述驱动基板依据驱动信号而施加负电压时，带负电的白色电泳粒子会朝电泳单元的显示侧移动，使得电子纸显示面板130可依据电泳粒子的移动方向而显示为白色的显示画面。相对的，当所述驱动基板依据驱动信号而施加较高的正电压时，带正电的黑色电泳粒子会朝电泳单元的显示侧移动，使得电子纸显示面板130可依据电泳粒子的移动方向而显示为黑色的显示画面。For example, in this embodiment, the white electrophoretic particles may be negatively charged, while the black electrophoretic particles may be positively charged. When the driving substrate applies a negative voltage according to the driving signal, the negatively charged white electrophoretic particles move toward the display side of the electrophoretic unit, so that the electronic paper display panel 130 can display a white display image according to the moving direction of the electrophoretic particles. On the contrary, when the driving substrate applies a higher positive voltage according to the driving signal, the positively charged black electrophoretic particles will move toward the display side of the electrophoretic unit, so that the electronic paper display panel 130 can move according to the moving direction of the electrophoretic particles. The display screen is displayed in black.

值得一提的是，在本实施例中，处理电路110可通过调整驱动信号的电压大小，而将黑色电泳粒子以及白色电泳粒子推动至电泳单元中的特定均等位置，使得电子纸显示面板130显示出灰阶值并非为黑色或白色的颜色。It is worth mentioning that, in this embodiment, the processing circuit 110 can push the black electrophoretic particles and the white electrophoretic particles to specific equal positions in the electrophoretic unit by adjusting the voltage of the driving signal, so that the electronic paper display panel 130 displays Colors whose grayscale values are not black or white.

关于电子纸显示器100预测触控媒介的触控轨迹的操作细节，请同时参照图1、图2以及图3，图2是依照本发明一实施例的电子纸显示器100的驱动方法的流程图，图3是依照本发明一实施例关于电子纸显示面板130显示预测轨迹LA的触控显示情境300的示意图。For the operation details of the electronic paper display 100 predicting the touch trajectory of the touch medium, please refer to FIG. 1 , FIG. 2 and FIG. 3 . FIG. 2 is a flowchart of a driving method of the electronic paper display 100 according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a touch display scenario 300 in which the electronic paper display panel 130 displays a predicted trajectory LA according to an embodiment of the present invention.

详细来说，在步骤S210中，电子纸显示器100可以通过电子纸显示面板130来显示背景为第一颜色(例如，白色)的显示画面131，但本发明并不限于此。在步骤S220中，电子纸显示器100可以通过触控面板120输出当前触控的第一触控坐标P2。In detail, in step S210 , the electronic paper display 100 may display the display frame 131 with a background of the first color (eg, white) through the electronic paper display panel 130 , but the present invention is not limited thereto. In step S220 , the electronic paper display 100 may output the first touch coordinates P2 of the current touch through the touch panel 120 .

举例来说，在本实施例中，用户可以利用触控笔200于触控面板120上进行书写动作(例如是图3所示的线段，但本发明并不限于此)，并于第一时间点T1时，以触控坐标P0作为初始触控坐标，沿着触控轨迹L1、L2描绘至第一触控坐标P2。此时，触控面板120可于第一时间点T1时通过此触控结果来对处理电路110进行报点的动作。For example, in this embodiment, the user can use the stylus 200 to perform a writing action on the touch panel 120 (such as the line segment shown in FIG. 3 , but the present invention is not limited thereto), and at the first time At the point T1, the touch coordinate P0 is used as the initial touch coordinate, and the first touch coordinate P2 is drawn along the touch trajectories L1 and L2. At this time, the touch panel 120 can report a point to the processing circuit 110 through the touch result at the first time point T1.

接着，在步骤S230中，处理电路110可以驱动电子纸显示面板130显示具有第二颜色(例如，黑色)且对应于第一触控坐标P2与先前触控坐标之间的第一触控轨迹。Next, in step S230 , the processing circuit 110 may drive the electronic paper display panel 130 to display a first touch track with a second color (for example, black) corresponding to the first touch coordinate P2 and the previous touch coordinate.

进一步来说，在触控笔200从触控坐标P0沿着触控轨迹L1、L2描绘至第一触控坐标P2之后，处理电路110可以依据此触控结果产生具有正电压的驱动信号至电子纸显示面板130，以使带正电的黑色电泳粒子朝着电泳单元的显示侧移动。在此情况下，处理电路110可将对应于第一触控坐标P2与先前触控坐标P1之间的第一触控轨迹L2以及触控坐标P0与先前触控坐标P1之间的先前触控轨迹L1，以第二颜色(例如，黑色)显示于电子纸显示面板130的显示画面131中。Furthermore, after the stylus 200 draws from the touch coordinate P0 to the first touch coordinate P2 along the touch trajectories L1 and L2, the processing circuit 110 can generate a driving signal with a positive voltage to the electronics according to the touch result. Paper display panel 130 to move the positively charged black electrophoretic particles toward the display side of the electrophoretic unit. In this case, the processing circuit 110 may correspond to the first touch trace L2 between the first touch coordinate P2 and the previous touch coordinate P1 and the previous touch trace L2 between the touch coordinate P0 and the previous touch coordinate P1 The locus L1 is displayed on the display screen 131 of the electronic paper display panel 130 in a second color (for example, black).

接着，在步骤S240中，处理电路110可以依据第一触控轨迹L2与先前触控轨迹L1来驱动电子纸显示面板130显示具有第三颜色(例如，灰阶)的预测轨迹LA。Next, in step S240 , the processing circuit 110 may drive the electronic paper display panel 130 to display the predicted trajectory LA having a third color (eg, gray scale) according to the first touch trajectory L2 and the previous touch trajectory L1 .

举例来说，在一些设计需求下(在一些实施例中)，在第一时间点T1之后的第二时间点T2(亦即，触控面板120输出当前触控的第一触控坐标P2之后)中，处理电路110可以通过一算法来依据第一触控轨迹L2与先前触控轨迹L1来预测触控面板120输出下一触控的触控坐标(亦即，预测触控坐标PA)，以及预测当前触控的第一触控坐标P2至所述下一触控的触控坐标之间的触控轨迹(亦即，预测轨迹LA)。For example, under some design requirements (in some embodiments), after the first time point T2 after the first time point T1 (that is, after the touch panel 120 outputs the first touch coordinate P2 of the current touch ), the processing circuit 110 may use an algorithm to predict the touch coordinates of the next touch (that is, the predicted touch coordinates PA) output by the touch panel 120 according to the first touch trace L2 and the previous touch trace L1, And predicting the touch trajectory between the first touch coordinate P2 of the current touch and the touch coordinate of the next touch (that is, the predicted trajectory LA).

同时，处理电路110可以在预测完成预测轨迹LA之后，依据此预测结果产生驱动信号至电子纸显示面板130，以将黑色电泳粒子以及白色电泳粒子分别推动至电泳单元中的特定均等位置。在此情况下，处理电路110可将预测轨迹LA以第三颜色(例如，灰阶)显示于电子纸显示面板130的显示画面131中。At the same time, after the predicted trajectory LA is predicted, the processing circuit 110 can generate a driving signal to the electronic paper display panel 130 according to the predicted result, so as to push the black electrophoretic particles and the white electrophoretic particles to specific equal positions in the electrophoretic unit respectively. In this case, the processing circuit 110 may display the predicted trajectory LA on the display frame 131 of the electronic paper display panel 130 in a third color (eg, grayscale).

而在另一些设计需求下(在另一些实施例中)，在第二时间点T2中，处理电路110亦可通过所述算法来依据第一触控轨迹L2来预测触控面板120输出下一触控的触控坐标(亦即，预测触控坐标PA)，以及预测当前触控的第一触控坐标P2至所述下一触控的触控坐标之间的触控轨迹(亦即，预测轨迹LA)。并且，处理电路110亦可将预测轨迹LA以第三颜色(例如，灰阶)显示于电子纸显示面板130的显示画面131中。However, under other design requirements (in other embodiments), at the second time point T2, the processing circuit 110 can also use the algorithm to predict the next output of the touch panel 120 according to the first touch trace L2. The touch coordinates of the touch (that is, the predicted touch coordinates PA), and the touch trajectory between the first touch coordinates P2 of the current touch and the touch coordinates of the next touch (that is, predicted predicted trajectory LA). Moreover, the processing circuit 110 may also display the predicted trajectory LA on the display screen 131 of the electronic paper display panel 130 in a third color (eg, grayscale).

换言之，在图3所示的触控显示情境300中，处理电路110可以依据当前触控的第一触控坐标P2之前的一个或多个触控轨迹(例如，触控轨迹L1、L2)以和/或两个或多个触控坐标(例如，触控坐标P0～P2)，以通过所述算法来预测触控面板120输出下一触控的触控坐标(亦即，预测触控坐标PA)以及当前触控的第一触控坐标P2至所述下一触控的触控坐标之间的触控轨迹(亦即，预测轨迹LA)。In other words, in the touch display scenario 300 shown in FIG. And/or two or more touch coordinates (for example, touch coordinates P0～P2), so as to predict the touch coordinates of the touch panel 120 outputting the next touch through the algorithm (that is, predict the touch coordinates PA) and the touch trajectory between the first touch coordinate P2 of the current touch and the touch coordinate of the next touch (that is, the predicted trajectory LA).

需注意到的是，本实施例的算法可例如是卡尔曼滤波器(Kalman Filter)或是外插法，但本发明并不限于此。此外，在本实施例中，第三颜色的灰阶可介于第一颜色以及第二颜色之间。其中，第一颜色例如是白色，第二颜色例如是黑色，第三颜色例如是灰阶，但本发明并不限于此。It should be noted that the algorithm of this embodiment may be, for example, a Kalman filter or an extrapolation method, but the present invention is not limited thereto. In addition, in this embodiment, the gray scale of the third color may be between the first color and the second color. Wherein, the first color is, for example, white, the second color is, for example, black, and the third color is, for example, gray scale, but the present invention is not limited thereto.

根据上述图3所示的触控显示情境300的说明内容可以得知，本实施例的电子纸显示器100可以通过处理电路110来计算出预测触控坐标PA以及预测轨迹LA，并使预测触控轨迹LA以第三颜色(例如，灰阶)的表示方式显示于电子纸显示面板130。如此一来，相较于现有技术是将预测触控轨迹以黑色的表示方式显示于显示面板，本实施例的电子纸显示面板130所显示的预测触控轨迹LA较不易使用户的眼睛察觉，进而提升了用户的观看质量。According to the above description of the touch display scenario 300 shown in FIG. The locus LA is displayed on the electronic paper display panel 130 in a third color (eg, gray scale) representation. In this way, compared with the prior art that displays the predicted touch trajectory in black on the display panel, the predicted touch trajectory LA displayed on the electronic paper display panel 130 of this embodiment is less likely to be perceived by the user's eyes. , thereby improving the user's viewing quality.

关于判断处理电路110所预测的预测轨迹LA与实际触控笔200从第一触控坐标P2描绘至所述下一触控的触控坐标(亦即，第二触控坐标P3)之间的触控轨迹(亦即，第二触控轨迹L3)是否相同的操作细节，请同时参照图1、图4、图5以及图6。图4是依照本发明一实施例说明图1所示的处理电路110的操作流程图，图5是依照本发明一实施例说明当第二触控轨迹L3与预测轨迹LA相同时的触控显示情境500的示意图，图6是依照本发明一实施例说明当第二触控轨迹L3与预测轨迹LA不同时的触控显示情境600的示意图。Regarding the distance between the predicted trajectory LA predicted by the judgment processing circuit 110 and the touch coordinate (that is, the second touch coordinate P3) drawn by the touch pen 200 from the first touch coordinate P2 to the next touch Please refer to FIG. 1 , FIG. 4 , FIG. 5 and FIG. 6 for the operation details of whether the touch traces (that is, the second touch trace L3 ) are the same. FIG. 4 is a flowchart illustrating the operation of the processing circuit 110 shown in FIG. 1 according to an embodiment of the present invention, and FIG. 5 is a touch display illustrating when the second touch track L3 is the same as the predicted track LA according to an embodiment of the present invention. A schematic diagram of the scenario 500 , FIG. 6 is a schematic diagram illustrating a touch display scenario 600 when the second touch trajectory L3 is different from the predicted trajectory LA according to an embodiment of the present invention.

在本实施例中，电子纸显示器100可以在执行完成图2所示的步骤S240的操作动作之后，接续执行图4所示的步骤S410的操作动作。在此请同时参照图1、图4以及图5，在步骤S410中，电子纸显示器100可以通过触控面板120输出下一触控的第二触控坐标P3。In this embodiment, the electronic paper display 100 may continue to perform the operation of step S410 shown in FIG. 4 after completing the operation of step S240 shown in FIG. 2 . Please refer to FIG. 1 , FIG. 4 and FIG. 5 at the same time. In step S410 , the electronic paper display 100 may output the second touch coordinates P3 of the next touch through the touch panel 120 .

具体而言，在处理电路110于第二时间点T2使预测轨迹LA以第三颜色(例如，灰阶)显示于电子纸显示面板130之后，触控笔200可于第二时间点T2之后的第三时间点，从第一触控坐标P2接续沿着第二触控轨迹L3描绘至第二触控坐标P3。此时，触控面板120可于第三时间点T3时通过触控结果来对处理电路110进行报点的动作。其中，本实施例的第二触控轨迹L3可以表示为触控笔200下一触控所实际描绘出的触控轨迹。Specifically, after the processing circuit 110 displays the predicted trajectory LA on the electronic paper display panel 130 in a third color (for example, gray scale) at the second time point T2, the stylus 200 can At the third time point, from the first touch coordinate P2 to the second touch coordinate P3, it is continuously drawn along the second touch trajectory L3. At this time, the touch panel 120 can report a point to the processing circuit 110 through the touch result at the third time point T3. Wherein, the second touch track L3 in this embodiment may be represented as a touch track actually drawn by the stylus 200 for a next touch.

在步骤S420中，处理电路110可以判断第一触控坐标P2与第二触控坐标P3之间的第二触控轨迹L3与预测轨迹LA是否相同。举例来说，处理电路110可以判断触控笔200于第三时间点T3时所实际描绘的第二触控轨迹L3与处理电路110于第二时间点T2时所计算出的预测轨迹LA是否具有重叠的部分。In step S420 , the processing circuit 110 may determine whether the second touch trajectory L3 between the first touch coordinate P2 and the second touch coordinate P3 is the same as the predicted trajectory LA. For example, the processing circuit 110 can determine whether the second touch trajectory L3 actually drawn by the stylus 200 at the third time point T3 and the predicted trajectory LA calculated by the processing circuit 110 at the second time point T2 have the same overlapping parts.

其中，当处理电路110判断出第二触控轨迹L3与预测轨迹LA为相同的轨迹(亦即，第二触控轨迹L3与预测轨迹LA具有重叠的部分)时，处理电路110将会接续执行步骤S430的操作动作。相对的，当处理电路110判断出第二触控轨迹L3与预测轨迹LA为不同的轨迹(亦即，第二触控轨迹L3与预测轨迹LA未具有重叠的部分)时，处理电路110将会接续执行步骤S440以及步骤S450的操作动作。Wherein, when the processing circuit 110 determines that the second touch trajectory L3 and the predicted trajectory LA are the same trajectory (that is, the second touch trajectory L3 and the predicted trajectory LA have overlapping parts), the processing circuit 110 will continue to execute The operation of step S430. In contrast, when the processing circuit 110 determines that the second touch trajectory L3 and the predicted trajectory LA are different trajectories (that is, the second touch trajectory L3 and the predicted trajectory LA do not have overlapping portions), the processing circuit 110 will The operations of step S440 and step S450 are performed continuously.

在此请同时参照图1、图4以及图5，在步骤S430中，处理电路110可以驱动电子纸显示面板130，以将电子纸显示面板130所显示的预测轨迹LA转换为第二颜色(例如，黑色)。Please refer to FIG. 1, FIG. 4 and FIG. 5 at the same time. In step S430, the processing circuit 110 may drive the electronic paper display panel 130 to convert the predicted trajectory LA displayed on the electronic paper display panel 130 into a second color (for example, ,black).

详细来说，在触控显示情境500中，当处理电路110判断出第二触控轨迹L3与预测轨迹LA具有重叠的部分时，处理电路110可依据此判断结果产生具有正电压的驱动信号至电子纸显示面板130，以使与第二触控轨迹L3重叠的预测轨迹LA的部分所对应的像素中的黑色电泳粒子，从原先的特定均等位置朝着电泳单元的显示侧移动。Specifically, in the touch display scenario 500, when the processing circuit 110 judges that the second touch trace L3 overlaps with the predicted trace LA, the processing circuit 110 can generate a driving signal with a positive voltage according to the judgment result to The electronic paper display panel 130 moves the black electrophoretic particles in the pixels corresponding to the portion of the predicted trajectory LA overlapping with the second touch trajectory L3 from the original specific uniform position to the display side of the electrophoretic unit.

藉此，处理电路110能够将电子纸显示面板130所显示与第二触控轨迹L3重叠的预测轨迹LA的部分，从第三颜色(例如，灰阶)转换为第二颜色(例如，黑色)来显示于显示画面131中。In this way, the processing circuit 110 can convert the part of the predicted trajectory LA displayed on the electronic paper display panel 130 overlapping with the second touch trajectory L3 from the third color (for example, gray scale) to the second color (for example, black) to be displayed on the display screen 131.

在此请同时参照图1、图4以及图6，在步骤S440中，处理电路110可以驱动电子纸显示面板130，以将电子纸显示面板130所显示的预测轨迹LA转换为第一颜色(例如，白色)。Please refer to FIG. 1, FIG. 4 and FIG. 6 at the same time. In step S440, the processing circuit 110 may drive the electronic paper display panel 130 to convert the predicted trajectory LA displayed on the electronic paper display panel 130 into a first color (for example, ,White).

详细来说，在触控显示情境600中，当处理电路110判断出第二触控轨迹L3与预测轨迹LA不具有重叠的部分时，处理电路110可依据此判断结果产生具有负电压的驱动信号至电子纸显示面板130，以使未与第二触控轨迹L3重叠的预测轨迹LA的部分所对应的像素中的白色电泳粒子，从原先的特定均等位置朝着电泳单元的显示侧移动。Specifically, in the touch display scenario 600, when the processing circuit 110 judges that the second touch trace L3 does not overlap with the predicted trace LA, the processing circuit 110 can generate a driving signal with a negative voltage according to the judgment result. To the electronic paper display panel 130, the white electrophoretic particles in the pixels corresponding to the portion of the predicted trajectory LA not overlapping with the second touch trajectory L3 move from the original specific uniform position toward the display side of the electrophoretic unit.

藉此，处理电路110能够将电子纸显示面板130所显示未与第二触控轨迹L3重叠的预测轨迹LA的部分，从第三颜色(例如，灰阶)转换为第一颜色(例如，白色)来显示于显示画面131中。In this way, the processing circuit 110 can convert the part of the predicted trajectory LA displayed on the electronic paper display panel 130 that does not overlap with the second touch trajectory L3 from the third color (for example, grayscale) to the first color (for example, white). ) to be displayed on the display screen 131.

接着，在步骤S440之后的步骤S450中，处理电路110可以进一步地驱动电子纸显示面板130显示具有第二颜色(例如，黑色)的第二触控轨迹L3。Next, in step S450 following step S440 , the processing circuit 110 may further drive the electronic paper display panel 130 to display the second touch track L3 having a second color (eg, black).

具体而言，在处理电路110未预测到触控笔200第一触控坐标P2与第二触控坐标P3之间实际的触控轨迹(亦即，第二触控轨迹L3)的情况下，处理电路110可依据判断结果产生具有正电压的驱动信号至电子纸显示面板130，以使未与预测轨迹LA重叠的第二触控轨迹L3的部分所对应的像素中的黑色电泳粒子朝着电泳单元的显示侧移动。Specifically, when the processing circuit 110 does not predict the actual touch track (that is, the second touch track L3 ) between the first touch coordinate P2 and the second touch coordinate P3 of the stylus 200 , The processing circuit 110 can generate a driving signal with a positive voltage to the electronic paper display panel 130 according to the judgment result, so that the black electrophoretic particles in the pixels corresponding to the part of the second touch track L3 that does not overlap with the predicted track LA move towards the electrophoretic The display side of the unit moves.

藉此，处理电路110能够将电子纸显示面板130所显示未与预测轨迹LA重叠的第二触控轨迹L3的部分，从第一颜色(例如，白色)转换为第二颜色(例如，黑色)来显示于显示画面131中。In this way, the processing circuit 110 can convert the part of the second touch track L3 displayed on the electronic paper display panel 130 that does not overlap with the predicted track LA from the first color (for example, white) to the second color (for example, black) to be displayed on the display screen 131.

根据上述图6的触控显示情境600的说明内容可以得知，由于本实施例的预测触控轨迹LA于第二时间点T2时是以第三颜色(例如，灰阶)的表示方式显示于电子纸显示面板130，并且预测触控轨迹LA所对应的像素中的白色电泳粒子已预先推动至电泳单元中的特定均等位置。因此，当判断出第二触控轨迹L3与预测轨迹LA不具有重叠的部分时，处理电路110于第三时间点T3时仅需将对应的像素中的白色电泳粒子从原先的特定均等位置朝着电泳单元的显示侧移动，以使未与第二触控轨迹L3重叠的预测轨迹LA的部分可以从第三颜色(例如，灰阶)转换为第一颜色(例如，白色)来显示于电子纸显示面板130。According to the above description of the touch display scenario 600 in FIG. The electronic paper display panel 130 predicts that the white electrophoretic particles in the pixel corresponding to the touch trajectory LA have been pushed to a specific uniform position in the electrophoretic unit in advance. Therefore, when it is determined that the second touch track L3 does not overlap with the predicted track LA, the processing circuit 110 only needs to move the white electrophoretic particles in the corresponding pixel from the original specific equal position to the third time point T3. The display side of the electrophoretic unit moves, so that the part of the predicted track LA that does not overlap with the second touch track L3 can be converted from the third color (for example, gray scale) to the first color (for example, white) to be displayed on the electronic device. Paper display panel 130 .

藉此，相较于现有技术需要将未与实际的触控轨迹重叠的预测轨迹的部分从原先的黑色转换为白色，以将白色电泳粒子从驱动基板朝着电泳单元的显示侧移动，本实施例的处理电路110可以更有效地降低处理预测错误的触控轨迹的时间，并且能够更快速的将显示于电子纸显示面板130的预测轨迹LA转换为第一颜色(例如，白色)。In this way, compared with the prior art, it is necessary to convert the part of the predicted track that does not overlap with the actual touch track from the original black to white, so as to move the white electrophoretic particles from the driving substrate to the display side of the electrophoretic unit. The processing circuit 110 of the embodiment can more effectively reduce the processing time of the incorrectly predicted touch track, and can more quickly convert the predicted track LA displayed on the electronic paper display panel 130 into the first color (eg, white).

综上所述，本发明诸实施例所述电子纸显示器及其驱动方法可以对触控媒介在触控面板上的触控轨迹进行预测，并且将所预测的触控轨迹以灰阶的表示方式显示于电子纸显示面板。如此一来，本发明的电子纸显示面板所显示的预测触控轨迹较不易使用户的眼睛察觉，进而提升用户的观看质量。并且，本发明更能够有效地降低处理预测错误的触控轨迹的时间。In summary, the electronic paper display and its driving method described in the embodiments of the present invention can predict the touch track of the touch medium on the touch panel, and express the predicted touch track in grayscale displayed on the e-paper display panel. In this way, the predicted touch trajectory displayed on the electronic paper display panel of the present invention is less likely to be perceived by the user's eyes, thereby improving the viewing quality of the user. Moreover, the present invention can more effectively reduce the time for processing the incorrectly predicted touch track.

Claims (10)

1. An electronic paper display, comprising:
the electronic paper display panel is used for displaying a display picture with a first color as a background;
the touch panel is integrated with the electronic paper display panel and used for outputting a first touch coordinate of current touch; and
a processing circuit coupled to the electronic paper display panel and the touch panel and configured to drive the electronic paper display panel to display a first touch trajectory having a second color and corresponding to a distance between the first touch coordinate and a previous touch coordinate,
wherein the processing circuit further drives the electronic paper display panel to display a predicted trajectory having a third color according to the first touch trajectory and a previous touch trajectory,
when a second touch track and the predicted track do not have an overlapped part, the processing circuit further determines that the second touch track and the predicted track are different tracks, wherein the second touch track is located between the first touch coordinate and a second touch coordinate of a next touch.
2. The electronic paper display of claim 1, wherein the touch panel outputs the second touch coordinate of the next touch, and when the processing circuit determines that the second touch trajectory between the first touch coordinate and the second touch coordinate is the same as the predicted trajectory, the processing circuit drives the electronic paper display panel to convert the predicted trajectory displayed by the electronic paper display panel into the second color.
3. The electronic paper display of claim 2, wherein when the processing circuit determines that the second touch trajectory is different from the predicted trajectory, the processing circuit drives the electronic paper display panel to convert the predicted trajectory displayed by the electronic paper display panel into the first color.
4. The electronic paper display of claim 3, wherein when the processing circuit determines that the second touch trajectory is different from the predicted trajectory, the processing circuit further drives the electronic paper display panel to display the second touch trajectory having the second color.
5. The electronic paper display of claim 1, wherein the gray scale of the third color is between the first color and the second color.
6. A driving method of an electronic paper display, comprising:
displaying a display picture with a background of a first color through an electronic paper display panel;
outputting a first touch coordinate of current touch through a touch panel;
driving the electronic paper display panel to display a first touch track which has a second color and corresponds to the position between the first touch coordinate and a previous touch coordinate; and
driving the electronic paper display panel to display a predicted track with a third color according to the first touch track and a previous touch track,
when a second touch track and the predicted track do not have an overlapped part, judging that the second touch track and the predicted track are different tracks, wherein the second touch track is located between the first touch coordinate and a second touch coordinate of the next touch.
7. The driving method according to claim 6, further comprising:
outputting the second touch coordinate of the next touch through the touch panel;
judging whether the second touch track between the first touch coordinate and the second touch coordinate is the same as the predicted track or not; and
and when the second touch track is the same as the predicted track, driving the electronic paper display panel to convert the predicted track displayed by the electronic paper display panel into the second color.
8. The driving method according to claim 7, further comprising:
when the second touch track is different from the predicted track, driving the electronic paper display panel to convert the predicted track displayed by the electronic paper display panel into the first color.
9. The driving method according to claim 8, characterized by further comprising:
when the second touch track is different from the predicted track, the electronic paper display panel is also driven to display the second touch track with the second color.
10. The driving method according to claim 6, wherein the gray scale of the third color is between the first color and the second color.
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