Electrophoretic display panel and control method

Abstract

The invention relates to an electrophoretic display panel and a control method. The electrophoretic display panel comprises a first substrate, a second substrate and an electrophoretic layer between the first substrate and the second substrate, the first substrate comprises sub-pixels which are distributed in an array mode and arranged at intervals, and the electrophoretic layer comprises stability maintaining liquid located in the sub-pixels and ink liquid arranged below the stability maintaining liquid in a layered mode; each sub-pixel comprises at least one light reflecting structure, and the light reflecting structures are immersed in the stability maintaining liquid and the ink liquid; a horizontal electric field corresponding to each sub-pixel is formed on the second substrate, a vertical electric field corresponding to each sub-pixel is formed between the first substrate and the second substrate, and the vertical electric field is used for driving the ink liquid and the stability maintaining liquid to move relative to each other so as to form a color developing state in which at least part of the ink liquid is located between the first substrate and the light reflecting structure; the horizontal electric field is used for driving the reflective structure to deflect relative to the preset position area of the first substrate, and the deflection angle is consistent with the user sight line data.

Description

Technical Field

[0001] The present application relates to the field of electrophoretic display, and in particular to an electrophoretic display panel and a control method thereof. Background Art

[0002] As a reflective display, electronic paper displays the screen content by reflecting natural light. The stronger the natural light, the more obvious the display is. It has a certain protective effect on the human eye and has attracted people's attention. As a display that imitates paper, electronic paper has the characteristics of being thin and light, simple in process, low in power consumption, eye protection, and can be reused compared to paper, so it has a huge development market.

[0003] However, general electronic paper can only reflect ambient light at a fixed angle, which results in the best viewing experience when looking directly at the electronic paper. When viewed from the side, the viewing experience gradually weakens as the angle increases, affecting the user's viewing experience. Summary of the invention

[0004] The present application provides an electrophoretic display panel and a driving method to solve the technical problem in the prior art that the side-view electronic paper gradually weakens the viewing experience as the angle increases.

[0005] The electrophoretic display panel provided by the present invention comprises: a first substrate, a second substrate and an electrophoretic layer therebetween, wherein the first substrate comprises sub-pixels distributed in an array and spaced apart from each other, and the electrophoretic layer comprises a stabilizing liquid located in each of the sub-pixels and an ink liquid layered below the stabilizing liquid; each of the sub-pixels comprises at least one reflective structure immersed in the stabilizing liquid and the ink liquid; the second substrate forms a horizontal electric field corresponding to each of the sub-pixels; a vertical electric field corresponding to each of the sub-pixels is formed between the first substrate and the second substrate, and the vertical electric field is used to drive the ink liquid and the stabilizing liquid to move relative to each other to form a color display state in which at least part of the ink liquid is located between the first substrate and the reflective structure; the horizontal electric field is used to drive the reflective structure to deflect relative to a preset position area of ​​the first substrate, and the direction and angle of the deflection are consistent with the user's line of sight.

[0006] Among them, the electrophoretic display panel also includes a control system and an image acquisition device, the image acquisition device is used to obtain user line of sight information in real time, and send the user line of sight information to the control system, the control system processes the user line of sight information to obtain user line of sight data, and the control system adjusts the direction and size of the horizontal electric field according to the user line of sight data.

[0007] In which, the second substrate is formed with a first driving electrode and a second driving electrode corresponding to each of the sub-pixels, the first driving electrode and the second driving electrode are located on both sides of each of the sub-pixels along the first direction, and the control system is used to respectively control the voltages of the first driving electrode and the second driving electrode to form the horizontal electric field along the first direction.

[0008] Among them, the second substrate is also formed with a third driving electrode corresponding to each of the sub-pixels, and the first substrate is formed with a common electrode corresponding to each of the sub-pixels. The control system controls the voltages of the common electrode and the third driving electrode respectively to form a vertical electric field therebetween. The vertical electric field is used to drive the ink liquid to move along the second direction, and the vertical electric field and the horizontal electric field do not affect each other.

[0009] When the reflective structure rotates, along the irradiation direction of ambient light at different angles, the light emitting sides of two adjacent reflective structures form a continuous reflective surface, and the ink liquid between the two adjacent reflective structures will not appear in the display area of ​​the first substrate.

[0010] Among them, the reflective structure is constructed as a three-dimensional geometric shape enclosed by a first reflective surface and a second reflective surface, the first reflective surface is arranged toward the first substrate, and the second reflective surface is arranged toward the second substrate, and the second reflective surface of the reflective structure is used to slide relative to the surface of the second substrate so that the reflective structure can swing relative to a preset position area of ​​the first substrate.

[0011] The surface of the second substrate has a concave area, the second reflective surface is constructed as a curved surface shape that matches the shape of the concave area, and the reflective structure is slidably matched with the concave area through the second reflective surface.

[0012] The first reflective surface includes a plurality of continuously arranged bending planes, each of the bending planes is a reflective sub-plane, and the ambient light is reflected to the user's field of view after being reflected by at least two of the reflective sub-planes.

[0013] Among them, the electrophoretic display panel has a first central axis, the reflective structure has a second central axis, and when the reflective structure rotates, a gap is formed between each second reflective surface and an adjacent boundary of each sub-pixel, and the stabilizing liquid and / or the ink liquid can flow back and forth in the second direction in the area of ​​the gap.

[0014] The overall shape of the reflective structure is any one of a prism, a pyramid or a hemisphere.

[0015] The shape of the projection area of ​​the reflective structure along the second direction is a circle, and the shape of the sub-pixel is circumscribed to the circle.

[0016] The control method provided by the present invention is applied to the above-mentioned electrophoretic display panel, and the control method includes:

[0017] Get user's sight information;

[0018] Obtaining user sight line data according to the user sight line information;

[0019] According to the user sight data, the direction and size of a horizontal electric field of the second substrate are respectively controlled, wherein the horizontal electric field is used to drive the reflective structure to deflect relative to a preset position area of ​​the first substrate, and the deflection angle is consistent with the user sight data;

[0020] The magnitude of the vertical electric field between the first substrate and the second substrate is controlled, and the vertical electric field is used to drive the ink liquid and the stabilizing liquid to move relative to each other.

[0021] Wherein, the step of controlling the direction and magnitude of a horizontal electric field of the second substrate according to the user line of sight data includes:

[0022] Different first voltage signals are applied to the first driving electrode and the second driving electrode of each sub-pixel of the second substrate, respectively, so that a horizontal electric field along a first direction is formed between each first driving electrode and the second driving electrode of each sub-pixel.

[0023] Wherein, the step of controlling the direction and magnitude of a horizontal electric field of the second substrate according to the user line of sight data further includes:

[0024] A common voltage signal is applied to the common electrode of each sub-pixel of the first substrate, and a fourth voltage signal is applied to the third driving electrode of each sub-pixel of the second substrate, so that a vertical electric field is formed between the third driving electrode of each sub-pixel and the common electrode.

[0025] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0026] The electrophoretic display panel and control method provided by the embodiment of the present application are provided with a reflective structure on the electrophoretic layer, and a horizontal electric field corresponding to each of the sub-pixels is formed on the second substrate, and a vertical electric field is formed between the first substrate and the second substrate. Here, both the horizontal electric field and the vertical electric field are along a preset direction. For example, considering the actual application scenario of the electrophoretic display panel, the horizontal electric field can be formed on the second substrate along the first direction, and the vertical electric field can be formed between the first substrate and the second substrate along the second direction. Under the action of the horizontal electric field, the reflective structure can be deflected relative to the preset position area of ​​the first substrate; the direction and angle of the deflection of the reflective structure are set to be consistent with the user's line of sight data, and the user's line of sight data here can be understood as the line of sight angle of the user's gaze at the screen position. In this way, as the angle of the user's gaze at the screen changes continuously, the horizontal electric field can drive the reflective structure to deflect, and the direction and angle of the deflection are consistent with the user's line of sight. As the reflective structure deflects, the light-emitting side on the reflective structure also follows the deflection, which can make more ambient light from a viewing angle shine on the light-emitting side of the reflective structure, thereby achieving a greater viewing angle observation effect. Under the combined effect of the vertical electric field and the horizontal electric field, a wider viewing angle is obtained while the preset image or dynamic image of the display area can be viewed. Since the reflective structure deflects with the user's line of sight, the viewing effect at each viewing angle is consistent with that when looking straight ahead. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] Figure 1 A schematic diagram of the cross-sectional structure of an electrophoretic display panel provided in an embodiment of the present application (i.e., the layered structure arrangement between sub-pixels of the electrophoretic display panel);

[0031] Figure 2Demonstration of the ambient light reflection path on the light-emitting side of the reflective structure in a single sub-pixel of the electrophoretic display panel provided by the embodiment of the present application and the state of the ink liquid being located between the reflective structure and the second substrate;

[0032] Figure 3 The state display of the reflective structure in the electrophoretic display panel provided by the embodiment of the present application being deflected under the action of a horizontal electric field;

[0033] Figure 4 A color development state diagram when the ink liquid and the stabilizing liquid in the electrophoretic display panel provided by the embodiment of the present application are completely interchanged;

[0034] Figure 5 A schematic diagram of a cross-sectional structure of an electrophoretic display panel along a thickness direction provided in an embodiment of the present application;

[0035] Figure 6 A diagram showing the position of each driving electrode relative to a sub-pixel in an electrophoretic display panel provided in an embodiment of the present application;

[0036] Figure 7 This is a schematic diagram of the overall structure of the electrophoretic display panel provided in an embodiment of the present application from a top view.

[0037] Description of reference numerals:

[0038] 1. First substrate; 2. Second substrate; A. Sub-pixel; 21. Recessed area; 3. Electrophoretic layer; 31. Stabilizing liquid; 32. Ink liquid; 4. Reflective structure; 41. First reflecting surface; 42. Second reflecting surface; 5. First driving electrode; 6. Second driving electrode; 7. Third driving electrode; 8. Common electrode; 9. Control system; 10. Image acquisition device. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0041] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a change in posture or a change in motion state, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptions used herein have been interpreted accordingly.

[0042] With the continuous changes in display technology, the technologies of LCD, OLED and CRT tubes have gradually become popular. Gradually, electronic paper, also known as electronic ink screen, has become a unique existence. Electronic paper is essentially a thin film, on which a layer of charged material, namely electronic ink, is "coated". Then, electrophoretic display technology (EPD) is used for color display. It is a black technology that can display content by reflecting ambient light. Traditional technology displays use strong liquid crystal backlights. These light sources shine directly into the eyes, which can easily cause dry eyes and visual fatigue. The blue light emitted by the display can cause eye diseases and other problems. However, the electronic paper display does not require a backlight at all. It uses ambient light to hit the electronic paper and then reflects the light into the human eye. It is exactly the same as the visual principle of traditional paper or objects in life. Therefore, the brighter the ambient light source, the clearer the electronic paper is. Its advantages are environmental protection, paper saving, unlimited repeated use, less electricity consumption, more energy saving, and better protection of eyesight.

[0043] The two core features of electronic paper include: first, paper-like display, which does not emit light by itself, but relies on ambient light reflection to present images, and has the characteristics of eye protection, full viewing angle and good outdoor display; second, bistable, static images with zero power consumption, contributing to the country's dual carbon goals. In particular, under the condition that no power is required, the electronic paper display can still maintain the function of displaying the image after the power is turned off.

[0044] Based on the above advantages of e-paper, it is applied to various scenarios, such as: outdoor bus stops, outdoor advertising headers, indoor displays or terminal displays, etc. Taking the application of e-paper technology in the field of terminal display as an example, the existing e-paper display panel, that is, the electrophoretic display panel, can only reflect ambient light at a fixed angle during the application process. This will result in the best viewing experience when looking directly at the e-paper, and the viewing experience will gradually weaken as the angle increases when looking from the side, affecting the user's viewing experience.

[0045] In order to alleviate the above-mentioned problem, the present invention provides an electrophoretic display panel, which has a reflective structure with an adjustable horizontal angle and can be deflected following the change of the user's line of sight. Since the reflective structure itself is an integral structure, during the deflection of the reflective structure, the side of the reflective structure used to reflect ambient light also follows the deflection, so that the ambient light originally absorbed obliquely along the periphery of the screen can also form a positive viewing angle with the deflected reflective structure, that is, the reflective structure can always be deflected following the user's line of sight, and after the deflection, the effect of positively observing the ambient light can still be obtained. In this way, when the user is not facing the screen, he can also obtain the viewing effect of facing the screen. At the same time, while the user is watching the screen, the display panel can also display images during the deflection of the reflective structure.

[0046] Reference below Figure 1-Figure 7 The electrophoretic display panel and control method of the present invention are further described.

[0047] The electrophoretic display panel provided by the embodiment of the present invention comprises: a first substrate 1, a second substrate 2 and an electrophoretic layer 3 therebetween, the first substrate 1 comprises sub-pixels A which are arranged in an array and spaced apart from each other, the electrophoretic layer 3 comprises a stabilizing liquid 31 located in each sub-pixel A and an ink liquid 32 which is layered and arranged below the stabilizing liquid 31; each sub-pixel A comprises at least one reflective structure 4, the reflective structure 4 is immersed in the stabilizing liquid 31 and the ink liquid 32, the second substrate 2 forms a horizontal electric field corresponding to each sub-pixel A; the horizontal electric field is used to drive the reflective structure 4 to deflect relative to a preset position area of ​​the first substrate 1, and the direction and angle of the deflection are consistent with the user's line of sight; on this basis, a vertical electric field corresponding to each sub-pixel A is formed between the first substrate 1 and the second substrate 2, and the vertical electric field is used to drive the ink liquid 32 and the stabilizing liquid 31 to move relative to each other, so as to form a color development area in which at least part of the ink liquid 32 is located between the first substrate 1 and the reflective structure 4;

[0048] For example, the reflective structure 4 and the ink liquid 32 of the present invention can be charged or uncharged. When uncharged, the pressure difference in the electric field is used to drive the electrophoretic particles in the reflective structure 4 or the ink liquid 32. Alternatively, for example, the reflective structure 4 is more sensitive to the electric field (the voltage for controlling its deflection and tilting is set to 0-3V), and the ink liquid 32 is less sensitive to the electric field (the voltage for controlling its up and down movement is set to 10-20V, and the com voltage is 15V), so the display function is performed first, and then the direction change function is performed. The two are not performed at the same time to avoid mutual influence.

[0049] In this way, a reflective structure 4 is provided on the electrophoretic layer 3, and a horizontal electric field corresponding to each sub-pixel A is formed on the second substrate 2, where the horizontal electric field is provided along the first direction, and a vertical electric field corresponding to each sub-pixel A is formed between the first substrate 1 and the second substrate 2, where the vertical electric field is provided along the second direction, wherein the first direction is the length direction of the display screen, and the second direction is the thickness direction of the display screen. The horizontal electric field and the vertical electric field in the present application can be controlled by the control system 9 respectively and run independently, or can be controlled uniformly by the control system 9. Exemplarily, they can be carried out simultaneously, or they can be carried out at preset time intervals or sequentially. If the combined operation is carried out according to the preset timing, the present invention does not limit the preset timing, as long as the control system 9 can realize real-time control of the direction and size of the horizontal electric field and the vertical electric field.

[0050] Under the action of the horizontal electric field, the reflective structure 4 can be deflected relative to the preset position area of ​​the second substrate 2; the direction and angle of the deflection of the reflective structure 4 are set to be consistent with the user's sight data, where the user's sight data can be understood as the sight angle of the user's gaze at the screen position. In this way, as the user's gaze position on the screen changes continuously, the control system 9 controls the direction and size of the horizontal electric field so that the horizontal electric field can drive the reflective structure 4 to deflect at different angles, where the different angles are consistent with the different angles of the user's gaze position on the screen.

[0051] In this way, as the reflective structure 4 deflects, the light-emitting side of the reflective structure 4 also deflects, so that more ambient light at a horizontal angle can be illuminated on the light-emitting side of the reflective structure 4, thereby achieving a greater horizontal viewing angle observation effect. Moreover, since the reflective structure 4 deflects following the user's line of sight data, a consistent viewing effect can be achieved at each viewing angle.

[0052] Considering how the reflective structure 4 in the electrophoretic display panel deflects following the user's line of sight, in this embodiment, the electrophoretic display panel also includes a control system 9 and an image acquisition device 10. The image acquisition device 10 is used to obtain the user's line of sight information in real time and send the user's line of sight information to the control system 9. The control system 9 processes the user's line of sight information to obtain the user's line of sight data. The control system 9 adjusts the direction and size of the horizontal electric field according to the user's line of sight data.

[0053] Exemplarily, the image acquisition device 10 may be a video device, such as a camera. The camera may be disposed on the first substrate 1. The present invention does not limit the installation method and position of the camera relative to the first substrate 1, as long as the user's line of sight can be obtained in real time.

[0054] Exemplarily, the human eye image or video can be collected by a camera; then the human eye features are extracted, such as: locating key feature points, calculating relevant parameters, etc.; then the corresponding feature parameter data of the aforementioned human eye features are analyzed and processed, a motion model is established, the gaze point is calculated, and the behavior is recognized, etc.; finally, operations are performed and feedback is provided according to the analysis results, and the tracking effect is adjusted and optimized according to the feedback. It can be understood here that the user's line of sight information is processed to obtain the user's line of sight data, and the control system 9 calculates the direction and size of the horizontal electric field according to the user's line of sight data. The direction and size of the horizontal electric field here are the electric field force required to drive the reflective structure 4 to deflect at a preset angle. This embodiment does not limit the process of the control system 9 calculating the direction and size of the horizontal electric field according to the user's line of sight data. It can be directly obtained by model calculation, or it can be obtained by comprehensive calculation using different rule algorithms or combined with manual input data. As long as the control system 9 can control the direction and size of the horizontal electric field according to the user's line of sight data, it can drive the reflective structure 4 to deflect, and the direction and angle of the deflection are consistent with the user's line of sight. It can be understood that the position after deflection can achieve a positive effect with the ambient light obliquely captured on the screen.

[0055] Based on the aforementioned control method of the control system 9 for the horizontal electric field, the control system 9 can independently control the size of the vertical electric field. Regarding the direction of the vertical electric field, it is arranged in the form of an ITO layer between the first substrate 1 and the second substrate 2 along a preset direction.

[0056] According to the scheme of this embodiment, based on the driving deflection characteristics of the horizontal electric field for the reflective structure 4, the direction of the horizontal electric field can be controlled by the chip, which can also be understood as the control system 9. For example, the setting of the direction of the horizontal electric field can be related to the user's line of sight acquired in real time, and the user's line of sight can be acquired by the image acquisition device 10. For example, the image acquisition device 10 can be a camera, and the camera can send the acquired user's line of sight information to the chip, and the chip can control the direction and size of the horizontal electric field according to the user's line of sight information. In this way, the horizontal electric field along the preset direction can act on the reflective structure 4 and deflect the reflective structure 4. The position after deflection can achieve a positive effect with the ambient light obliquely captured on the screen and the light-emitting side of the reflective structure 4.

[0057] Considering the way in which the control system 9 forms a horizontal electric field, in the electrophoretic display panel provided by an embodiment of the present invention, the second substrate 2 is formed with a first driving electrode 5 and a second driving electrode 6 corresponding to each sub-pixel A, and the first driving electrode 5 and the second driving electrode 6 are located on both sides of each sub-pixel A along the first direction. The control system 9 is used to respectively control the voltages of the first driving electrode 5 and the second driving electrode 6 to form a horizontal electric field along the first direction.

[0058] Exemplarily, the first driving electrode 5 and the second driving electrode 6 are metal layers or metal wires for conducting current formed on the second substrate 2, which can also be understood as resistance wires, and the two driving electrodes are arranged in layers. Moreover, the first driving electrode 5 and the second driving electrode 6 are respectively arranged on both sides of each sub-pixel A along the first direction. Considering that a horizontal electric field needs to be formed between the two, the first driving electrode 5 and the second driving electrode 6 need to be arranged oppositely and separately.

[0059] In this way, when a horizontal electric field along the first direction is formed between the first driving electrode 5 and the second driving electrode 6, the horizontal electric field can drive the reflective structure 4 to swing left and right along the first direction to adapt to the change of the user's line of sight in a larger range of horizontal angles. The present invention does not limit the angle range of the left and right swing of the reflective structure 4 along the first direction, which shall be based on the needs of the actual application scenario.

[0060] Considering that the user's line of sight is at different angles of the screen, the screen can still display the image normally, that is, when the control system 9 forms a horizontal electric field, the control system 9 can also drive the ink liquid 32, and the electric field used to drive the ink liquid 32 is independent of the horizontal electric field.

[0061] In the electrophoretic display panel of the present invention, the second substrate 2 is also formed with a third driving electrode 7 corresponding to each sub-pixel A, and the first substrate 1 is formed with a common electrode 8 corresponding to each sub-pixel A. The control system 9 controls the voltages of the common electrode 8 and the third driving electrode 7 respectively to form a vertical electric field therebetween. The vertical electric field is used to drive the ink liquid 32 to move along the second direction, and the vertical electric field and the horizontal electric field do not affect each other.

[0062] Exemplarily, the third driving electrode 7 is made of the same material as the first driving electrode 5 and the second driving electrode 6, and is a metal layer or metal wire formed on the second substrate 2 for conducting current, which can also be understood as a resistance wire, and the three driving electrodes are arranged in layers. Moreover, the third driving electrode 7 is used to form a vertical electric field between the common electrode 8 corresponding to each sub-pixel A. Exemplarily, a plurality of third driving electrodes 7 are arranged, and one third driving electrode 7 is arranged corresponding to each sub-pixel A.

[0063] In this way, when different voltage signals are simultaneously given to the common electrode 8 of the first substrate 1 and the third driving electrode 7 of the second substrate 2 , a vertical electric field along the second direction is formed between the common electrode 8 and the third driving electrode 7 .

[0064] Furthermore, when different currents are simultaneously applied to the first drive electrode 5, the second drive electrode 6, and the third drive electrode 7, the difference here may be only in direction or only in size or in both spacing size and direction, and a horizontal electric field along the first direction and a vertical electric field along the second direction may exist simultaneously. Since the ink liquid 32 and the reflective structure 4 have different sensitivities to the electric field, the reflective structure 4 has a higher sensitivity to the electric field and the ink liquid 32 has a lower sensitivity to the electric field, when the control system 9 controls the electric field, it will adjust the electric field value of the horizontal electric field to be smaller and the electric field value of the vertical electric field to be larger. The smaller horizontal electric field will only act on the reflective structure 4 but not on the ink liquid 32, while the larger vertical electric field will only drive the ink liquid 32 to move through the pressure difference when the pressure difference is formed. Based on its setting in a direction perpendicular to the reflective structure 4, the vertical electric field will not affect the left and right swing of the reflective structure 4.

[0065] Taking into account the problem of black spots on the screen that may occur during the application of the electrophoretic display panel, an embodiment of the present invention further provides an electrophoretic display panel, which defines that during the deflection process of the reflective structure 4, the light-emitting sides of two adjacent reflective structures 4 form a continuous reflective surface, so that the ink liquid 32 under the reflective structure 4 can be prevented from being displayed in the display area of ​​the first substrate 1, so as to further avoid the problem of black spots in the display area of ​​the electrophoretic display panel.

[0066] In this embodiment, when the reflective structure 4 rotates, the light emitting sides of two adjacent reflective structures 4 form a continuous reflective surface along the irradiation direction of ambient light at different angles, and the ink liquid 32 between the two adjacent reflective structures 4 will not appear in the display area of ​​the first substrate 1.

[0067] In this way, the light-emitting sides of two adjacent reflective structures 4 are defined to form a continuous reflective surface, so that the light-emitting side of the reflective structure 4 rotated to any desired angle can be directly captured by ambient light. Further, since each reflective structure 4 is located in each different sub-pixel A, the light-emitting sides of the two adjacent reflective structures 4 defined here form a continuous reflective surface. It can be understood that the reflective structure 4 in the sub-pixel A at the screen position where the user's line of sight is focused follows the user's line of sight deflection and is always in a state where the user's line of sight is directly facing the light-emitting side of the reflective structure 4. In this way, when the user looks at different positions of the screen, there is no blank position between the reflective structures 4 between two adjacent sub-pixels A, and the images displayed on the screen are all caused by the ink liquid 32 moved above the reflective structure 4, and have nothing to do with the ink liquid 32 below the reflective structure 4. When the stabilizing liquid 31 is located above the reflective structure 4 and the ink liquid 32 is located below the reflective structure 4, when looking at different positions of the screen along different user line of sight angles, the ink liquid 32 located below the reflective structure 4 is completely blocked by the reflective structure 4, and no black spot image will appear in this position area.

[0068] Considering the specific structure of the reflective structure 4, in the electrophoretic display panel of the embodiment of the present invention, the reflective structure 4 is constructed as a three-dimensional geometric shape enclosed by a first reflective surface 41 and a second reflective surface 42, the first reflective surface 41 is arranged toward the first substrate 1, and the second reflective surface 42 is arranged toward the second substrate 2, and the second reflective surface 42 of the reflective structure 4 is used to slide relative to the surface of the second substrate 2, so that the reflective structure 4 can swing relative to the preset position area of ​​the second substrate 2.

[0069] Exemplarily, the three-dimensional geometric shape here can be any one of a pyramid, a prism or a hemisphere. The first reflective surface 41 is the light-emitting side of the reflective structure 4, and the second reflective surface 42 is the backlight side of the reflective structure 4. Ambient light can be taken into the light-emitting side, wherein part of the ambient light is directly reflected by the light-emitting side, and part of the ambient light is refracted into the interior of the reflective structure 4 through the light-emitting side, and continues to be reflected on the inside of the second reflective surface 42, and then refracted by the first reflective surface 41. In this way, the reflective structure 4 can achieve a full internal reflection suppression effect. In addition, the reflective structure 4 slides relative to the surface of the first substrate 1 through the second reflective surface 42 to achieve the swing of the reflective structure 4 relative to the preset position area of ​​the first substrate 1. The sliding between the two can be achieved without the need for a structural connector, which can avoid the horizontal electric field from overcoming unnecessary external forces to drive the reflective structure 4.

[0070] The surface of the reflective structure 4 reflects and refracts ambient light through the first reflective surface 41. The light refracted into the reflective structure 4 is then reflected by the second reflective surface 42, refracted by the first reflective surface 41, and then emitted to the user's line of sight, which can improve the utilization rate of light.

[0071] When the reflective structure 4 is deflected to a certain angle, the ambient light irradiated from the side will not be able to contact the first reflective surface 41 of the reflective structure 4, but can only contact the second reflective surface 42 on the backlight side of the reflective structure 4, while the side of the second reflective surface 42 located inside the reflective structure 4 can reflect light, and the side of the second reflective surface 42 located outside the reflective structure 4 cannot reflect light, and the ambient light cannot be reflected from the outside of the second reflective surface 42, so the image on the electrophoretic display panel cannot be obtained at this angle, and the anti-peeping function can be achieved. This application does not limit the setting range of the anti-peeping angle, and the specific application shall prevail.

[0072] Taking into account the problem of position deviation that may occur when the reflective structure 4 swings relative to the preset position area of ​​the second substrate 2, in the electrophoretic display panel of the embodiment of the present invention, the surface of the second substrate 2 has a recessed area 21, and the second reflective surface 42 is constructed as a curved surface shape that matches the shape of the recessed area 21, and the reflective structure 4 slides with the recessed area 21 through the second reflective surface 42.

[0073] In this way, the reflective structure 4 will not separate from the recessed area 21 during the swinging process. In addition, the reflective structure 4 slides in cooperation with the curved surface of the recessed area 21 within the limited area of ​​each individual sub-pixel A. The deflection of the reflective structure 4 to the left or right in the preset first direction can be restored to the initial position, and there will be no swinging misalignment problem.

[0074] Exemplarily, the recessed area 21 is a curved groove on the second substrate 2, which matches the curved structure of the second reflective surface 42 of the reflective structure 4. The present invention does not limit the specific shape, size and groove depth of the recessed area 21, which shall be subject to the actual application scenario.

[0075] Considering that part of the ambient light can be reflected back to the user's field of view after one reflection after being received by the first reflective surface 41 of the reflective structure 4, in the electrophoretic display panel of an embodiment of the present invention, the first reflective surface 41 includes a plurality of continuously arranged bending planes, each of which is a reflective sub-plane. The ambient light is reflected to the user's field of view after being reflected by at least two reflective sub-planes.

[0076] The embodiment of the present invention does not limit the angle of the bending plane relative to the screen. The angle setting of the angle is related to the angle range of receiving ambient light, and may be based on the needs of the actual application scenario. The embodiment of the present invention does not limit the shape and size of the bending plane, and may be based on the needs of the actual application scenario. Exemplarily, the bending plane may be a long strip structure, and the continuous bending plane is formed on the surface of the serrated structure on the light-emitting side of the reflective structure 4. In this way, the two adjacent bending planes can just reflect part of the ambient light twice and then reflect it into the user's line of sight, and the user can use this part of the ambient light as the light source to see the image of the position area.

[0077] Specifically, the electrophoretic display panel has a first central axis, the reflective structure 4 has a second central axis, and the reflective structure 4 has a first state and a second state during the rotation process; in the first state, the second central axis is parallel to the first central axis, and the vertical projection area of ​​the first reflective surface 41 toward the second substrate 2 completely covers the ink liquid 32 below. At this time, the user is facing the screen. At this moment, the ink liquid 32 below the reflective structure 4 is completely blocked by the reflective structure 4, and no black spot image will appear on the screen. At the same time, in the second state, an angle is formed between the second central axis and the first central axis, and a gap is formed between each second reflective surface 42 and the adjacent boundary of each sub-pixel A. The stabilizing liquid 31 and / or the ink liquid 32 can reciprocate in the second direction in the gap area. Combined with the aforementioned state that the light-emitting sides of the two adjacent reflective structures 4 are continuous reflective surfaces throughout, the reflective structure 4 rotates to any angle to maintain the condition of the continuous reflective surface. Even if the reflective structure 4 rotates, no additional black spots will appear on the screen (it can also be understood that the ink liquid 32 below the reflective structure 4 will never appear on the screen).

[0078] Considering the shape of the sub-pixel A adapted to the reflective structure 4 of the embodiment of the present invention, in the electrophoretic display panel of the embodiment of the present invention, the shape of the projection area of ​​the reflective structure 4 along the second direction is a circle, and the shape of the sub-pixel A is circumscribed to the circle, and is constructed as a square structure with chamfered corners, which can reserve a flow channel for the ink liquid 32. Furthermore, the shape of the sub-pixel A can match the first reflective surface 41 of the reflective structure 4 of the present invention, which can maximize the use of the total reflective area, can improve the pixel opening ratio formed when the reflective structure 4 is deflected, and can further facilitate the design of a larger pixel architecture space.

[0079] Exemplarily, the reflective structure 4 may account for approximately 90% of the area of ​​the sub-pixel A. This value may be adjusted by increasing the surface shape of the reflective structure 4 (the sub-pixel A may form a square structure with chamfered corners on all sides), which can maximize light utilization.

[0080] When in use, when the user looks directly at the electronic paper (i.e., the electrophoretic display panel), the reflective structure 4 in the sub-pixel A grid is symmetrically arranged inside the sub-pixel A grid, the horizontal reference plane of the first reflective surface 41 of the reflective structure 4 is parallel to the screen surface of the first substrate 1, and the second substrate 2 (which can also be understood as a glass substrate) has an arc-shaped groove (i.e., a recessed area 21) that fits with the lower surface of the reflective structure 4 (i.e., the second reflective surface 42), and the fit here is understood as a sliding fit relationship between the two. The setting of the recessed area 21. The position of the reflective structure 4 in the sub-pixel A can be limited to prevent it from swinging and misaligning, thereby causing abnormal reflection or display.

[0081] When the human eye needs to look sideways at the electronic paper, the camera under the electronic paper will detect the movement of the human eye, and then send instructions to the control system 9 to control the electric field voltage distribution of the ITO on the second substrate 2 (IPO here is the driving electrode) to control the deflection of the reflective structure 4 to the left or right along the first direction, thereby achieving the human eye tracking effect of the electrophoretic display panel.

[0082] When a black screen needs to be displayed, a signal is input to the corresponding ITO (ie, the driving electrode) to form a horizontal electric field and a vertical electric field, which attracts the black ink to move upward, exchange positions with the stabilizing liquid 31, cover the reflective structure 4, absorb external light, and form a black screen.

[0083] Since the ink liquid 32 and the reflective structure 4 need to be driven separately during display, a special ITO pattern setting is required to prevent the two from conflicting with each other during operation. At the same time, based on the principle of non-conflict, the voltage magnitude and positive and negative of the ink liquid 32 and the reflective structure 4 that can be driven are also different. For example, the reflective structure 4 is very small and is easily attracted by the electric field (but its sensitivity to the electric field is weaker than that of black ink), which gives it a positive charge; the black ink is not charged and moves up and down depending on the voltage difference between the upper and lower substrates. In addition, the black ink and the stabilizing liquid 31 are insoluble in each other and have different densities (black ink density>stabilizing liquid 31 density).

[0084] For example, when a bright picture needs to be displayed (the ink liquid 32 is above the reflective structure 4 at this time), assuming that the ink liquid 32 is negatively charged, a 15V voltage is applied to the upper common electrode 9, and a 20V voltage is applied to the lower third drive electrode 7 (the magnitude of this voltage can be adjusted according to the required grayscale. The lighter the grayscale, the greater the voltage, and vice versa). At this time, the direction of the electric field is displayed as along the bottom-up direction of the screen in the display screen application state, and the negatively charged particles move in the opposite direction of the electric field. As a result, the ink liquid 32 moves to the bottom of the reflective structure 4 (that is, from the front side to the back side of the screen) through the gap between the reflective structure 4 and the boundary of each sub-pixel A, displaying a bright picture. As a result, the ink liquid 32 is blocked by the reflective structure 4, solving the problem of black spots after ink shrinkage.

[0085] When the reflective structure 4 is horizontally deflected to a certain angle, the ambient light irradiated from the side will not be able to contact the first reflective surface 41 of the reflective structure 4, and can only contact the second reflective surface 42 on the backlight side of the reflective structure 4, and the side of the second reflective surface 42 located inside the reflective structure 4 cannot reflect light after inversion. In other words, at this time, the light refracted into the reflective structure by the second reflective surface 42 cannot be reflected and then reflected back to the user's line of sight, and the ambient light cannot be reflected from the outside of the second reflective surface 42. Therefore, the image on the electrophoretic display panel cannot be obtained at this angle, thereby achieving the anti-peeping function.

[0086] In specific operation, when the bright state is to be displayed and the user's viewing angle is to be followed, the common electrode 8 on the first substrate 1 and the first drive electrode 5, the second drive electrode 6 and the third drive electrode 7 on the second substrate 2 are turned on. For example, when facing the screen, the drive electrodes on the left and right sides of each sub-pixel A are charged with negative electricity to attract the reflective structure 4 to tilt to the left or right; when the black state is displayed, there is no need to care about the tilt direction of the reflective structure 4 at this time, and the first drive electrode 5 and the second drive electrode 6 arranged on the periphery of the second substrate 2 are directly turned off, for example, the drive electrodes on the left or right side of the sub-pixel A, and the third drive electrode 7 on the second substrate 2 and the upper common electrode 8 are turned on. The voltage of the common electrode 8 remains unchanged, and the voltage difference is changed according to the voltage passed into the third drive electrode 7 to control the displacement distance of the black ink.

[0087] The electrophoretic display panel of the present invention adopts an electronic ink screen, which can achieve the screen resolution effect facing the screen within the horizontal angle range under the application of a new control method and structure, and can also avoid the appearance of unnecessary black spot images within the horizontal angle range.

[0088] The embodiment of the present invention provides a control method, which can be applied to the aforementioned electrophoretic display panel and achieve the same effect as the electrophoretic display panel.

[0089] A control method provided by an embodiment of the present invention includes:

[0090] Get user's sight information;

[0091] Obtaining user sight line data according to user sight line information;

[0092] According to the user's sight data, the direction and size of a horizontal electric field of the second substrate 2 are controlled, and the horizontal electric field is used to drive the reflective structure 4 to deflect relative to the preset position area of ​​the first substrate 1, and the deflection angle is consistent with the user's sight data;

[0093] The magnitude of the vertical electric field between the first substrate 1 and the second substrate 2 is controlled, and the vertical electric field is used to drive the ink liquid 32 and the stabilizing liquid 31 to move relative to each other.

[0094] In this way, the control system 9 can obtain the user's line of sight in real time, and the real-time user's line of sight information can be processed to obtain the user's line of sight data. For example, the user's line of sight data can be vector information such as angle, position, and direction. The control system 9 calculates the direction and size of the horizontal electric field required for the reflective structure 4 to deflect to a preset angle based on the user's line of sight data, and then controls the direction and size of the horizontal electric plant. In this way, the effect of human eye tracking can be achieved, so that the reflective structure 4 swings with the change of the user's line of sight, and then achieves a state where the reflective structure 4 in any user's line of sight area can be deflected to a state that is directly opposite to the user's line of sight. At this time, the reflective structure 4 can also have sufficient reflected ambient light, and the vertical electric field can drive the ink liquid 32 to move, so that the image can be clearly seen, which is consistent with the effect of the user looking directly at the screen.

[0095] Considering the scheme in which the control system 9 forms a horizontal electric field in the first direction through the control circuit, the control system 9 of the present invention applies different first voltage signals to the first driving electrode 5 and the second driving electrode 6 of each sub-pixel A of the second substrate 2, respectively, and a horizontal electric field along the first direction is formed between the first driving electrode 5 and the second driving electrode 6 of each sub-pixel A. In this way, the horizontal electric field can act on the reflective structure 4 to make it swing left and right in the first direction.

[0096] Considering the scheme that the control system 9 forms a vertical electric field through the control circuit, the control system 9 of the present invention applies a common voltage signal to the common electrode 8 of each sub-pixel A of the first substrate 1, and applies a fourth voltage signal to the third driving electrode 7 of each sub-pixel A of the second substrate 2, so that a vertical electric field is formed between each third driving electrode 7 and the common electrode 8 of each sub-pixel A. In this way, the vertical electric field can act on the ink liquid 32, causing it to reciprocate in the second direction along the front-to-back direction of the gap area between the reflective structure 4 and the boundary of the sub-pixel A.

[0097] Assuming that the user is watching from the upper side of the screen, under the control of the human eye tracking function, the reflective structure 4 needs to move in the positive direction of the plane Y axis (that is, the second direction), and the reflective structure 4 is also set to be negatively charged (this design helps to prevent ink of the same charge from remaining on the surface of the reflective structure 4, causing ink residue problems). At this time, the three direction-changing signal lines (that is, the corresponding three drive electrodes) will be turned on and work, and two different voltages will be given to the first drive electrode 5 and the second drive electrode 6 respectively, so that a horizontal electric field along the first direction can be formed between the first drive electrode 5 and the second drive electrode 6, and the horizontal electric field is used to drive the horizontal angle deflection of the reflective structure 4. Two different voltages are given to the third drive electrode 7 and the common electrode 8 respectively, so that a vertical electric field along the second direction can be formed between the third drive electrode 7 and the common electrode 8, and the vertical electric field is used to drive the ink liquid 32 and the stabilizing liquid 31 to move relative to each other, and the movement direction is along the second direction.

[0098] In summary, the electrophoretic display panel and control method of the present invention can achieve the effect that the deflection of the reflective structure 4 changes with the change of the horizontal angle of the user's line of sight, and the reflective structure 4 in each sub-pixel A can achieve this effect. The reflective structure 4 with a first reflective surface 41 having a continuous bending plane on the surface, that is, the film with a prism structure on the surface is used as the reflective surface, and the reflective structure 4 will swing according to the change of the horizontal electric field in each sub-pixel A to achieve the effect of reflecting ambient light at different angles at the original angle. The human eye tracking system formed between the image acquisition device 10 and the control system 9 can achieve the effect of the reflective structure 4 following the movement of the human eye, so that the user can obtain a viewing angle with a larger horizontal angle, and can have a viewing angle close to 180°. There is a reflective structure 4 in each sub-pixel A, and each reflective structure 4 is circumscribed to the inner wall of the corresponding sub-pixel A, so that more reflective microstructures can be set. Compared with the reflective electronic paper with a traditional structure, more light will be reflected in the original light path direction, which increases the screen brightness. At the same time, the light refracted into the reflective structure 4 will also be reflected out by total internal reflection at the bottom of the reflective structure 4 (i.e., the second reflective surface 42), thereby improving the light utilization rate. In addition, the sub-pixel A adopts a square structure with chamfered corners on all sides, which can leave a channel for the ink liquid 32 to flow.

[0099] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0100] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0101] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electrophoretic display panel, comprising: A first substrate (1), a second substrate (2) and an electrophoretic layer (3) therebetween, wherein the first substrate (1) comprises sub-pixels (A) arranged in an array and spaced apart from each other; The electrophoretic layer (3) comprises a stabilizing liquid (31) located in each of the sub-pixels (A) and an ink liquid (32) layered below the stabilizing liquid (31); Each of the sub-pixels (A) includes at least one reflective structure (4), the reflective structure (4) is immersed in the stabilizing liquid (31) and the ink liquid (32), and the second substrate (2) forms a horizontal electric field corresponding to each of the sub-pixels (A); the horizontal electric field is used to drive the reflective structure (4) to deflect relative to a preset position area of ​​the first substrate (1), and the deflection direction and angle are consistent with the user's line of sight; A vertical electric field corresponding to each of the sub-pixels (A) is formed between the first substrate (1) and the second substrate (2), and the vertical electric field is used to drive the ink liquid (32) and the stabilizing liquid (31) to move relative to each other, so as to form a color display area in which at least part of the ink liquid (32) is located between the first substrate (1) and the reflective structure (4).

2. The electrophoretic display panel according to claim 1, characterized in that: The electrophoretic display panel further comprises a control system (9) and an image acquisition device (10), wherein the image acquisition device (10) is used to acquire user sight line information in real time and send the user sight line information to the control system (9), wherein the control system (9) processes the user sight line information to obtain user sight line data, and wherein the control system (9) adjusts the direction and size of the horizontal electric field according to the user sight line data.

3. The electrophoretic display panel according to claim 2, characterized in that: The second substrate (2) is formed with a first driving electrode (5) and a second driving electrode (6) corresponding to each of the sub-pixels (A), and the first driving electrode (5) and the second driving electrode (6) are located on both sides of each of the sub-pixels (A) along a first direction; the control system is used to control the voltages of the first driving electrode (5) and the second driving electrode (6) respectively to form the horizontal electric field along the first direction.

4. The electrophoretic display panel according to claim 3, characterized in that: The second substrate (2) is also formed with a third driving electrode (7) corresponding to each of the sub-pixels (A), and the first substrate (1) is formed with a common electrode (8) corresponding to each of the sub-pixels (A). The control system controls the voltages of the common electrode (8) and the third driving electrode (7) respectively, so that a vertical electric field is formed therebetween. The vertical electric field is used to drive the ink liquid (32) to move along the second direction, and the vertical electric field and the horizontal electric field do not affect each other.

5. The electrophoretic display panel according to claim 4, characterized in that: During the rotation of the reflective structure (4), along the irradiation direction of ambient light at different angles, the light emitting sides of two adjacent reflective structures (4) form a continuous reflective surface, and the ink liquid (32) between the two adjacent reflective structures (4) will not appear in the display area of ​​the first substrate (1).

6. The electrophoretic display panel according to claim 5, characterized in that: The reflective structure (4) is constructed as a three-dimensional geometric shape enclosed by a first reflective surface (41) and a second reflective surface (42), wherein the first reflective surface (41) is arranged toward the first substrate (1), and the second reflective surface (42) is arranged toward the second substrate (2), and the second reflective surface (42) of the reflective structure (4) is used to slide relative to the surface of the second substrate (2), so that the reflective structure (4) can swing relative to a preset position area of ​​the second substrate (2).

7. The electrophoretic display panel according to claim 6, characterized in that: The surface of the second substrate (2) has a recessed area (21); the second reflecting surface (42) is constructed as a curved surface shape that matches the shape of the recessed area (21); and the reflective structure (4) is slidably matched with the recessed area (21) via the second reflecting surface (42).

8. The electrophoretic display panel according to claim 6, characterized in that: The first reflection surface (41) comprises a plurality of continuously arranged bending planes, each of the bending planes being a reflection sub-plane, and the ambient light is reflected to the user's field of view after being reflected by at least two of the reflection sub-planes.

9. The electrophoretic display panel according to claim 8, characterized in that: The electrophoretic display panel has a first central axis, and the reflective structure (4) has a second central axis. During the rotation of the reflective structure (4), a gap is formed between each of the second reflective surfaces (42) and the adjacent boundaries of each of the sub-pixels (A), and the stabilizing liquid (31) and / or the ink liquid (32) reciprocates in the second direction in the area of ​​the gap.

10. The electrophoretic display panel according to claim 8, characterized in that: The overall shape of the reflective structure (4) is any one of a prism, a pyramid or a hemisphere.

11. The electrophoretic display panel according to claim 2, characterized in that: The shape of the projection area of ​​the reflective structure (4) along the second direction is a circle, and the shape of the sub-pixel (A) is circumscribed to the circle, and is constructed as a square structure with chamfered corners.

12. A control method, applied to the electrophoretic display panel according to any one of claims 1 to 11, characterized in that: The control method comprises: Get user's sight information; Obtaining user sight line data according to the user sight line information; According to the user's sight line data, the direction and size of a horizontal electric field of the second substrate (2) are controlled, the horizontal electric field being used to drive the reflective structure (4) to deflect relative to a preset position area of ​​the first substrate (1), the direction and angle of the deflection being consistent with the user's sight line data; The magnitude of the vertical electric field between the first substrate (1) and the second substrate (2) is controlled, and the vertical electric field is used to drive the ink liquid (32) and the stabilizing liquid (31) to move relative to each other.

13. The control method according to claim 12, characterized in that: The step of controlling the direction and magnitude of a horizontal electric field of the second substrate (2) according to the user's line of sight data comprises: Different first voltage signals are applied to the first drive electrode (5) and the second drive electrode (6) of each sub-pixel (A) of the second substrate (2), respectively, so that a horizontal electric field along a first direction is formed between each of the first drive electrodes (5) and the second drive electrodes (6) of each of the sub-pixels (A).

14. The control method according to claim 13, characterized in that: The step of controlling the magnitude of the vertical electric field between the first substrate (1) and the second substrate (2) further includes: A common voltage signal is applied to the common electrode (8) of each sub-pixel (A) of the first substrate (1), and a fourth voltage signal is applied to the third drive electrode (7) of each sub-pixel (A) of the second substrate (2), so that a vertical electric field is formed between each of the third drive electrodes (7) of each sub-pixel (A) and the common electrode (8).

Images