Electronic paper display panel, control method thereof, and electronic paper display device

Abstract

The application discloses an electronic paper display panel and a control method thereof and an electronic paper display device, and mainly relates to the technical field of display. The electronic paper display panel comprises a plurality of pixel unit regions, each of which comprises a peep-proof region and a sharing region. An electrophoretic layer and a peep-proof function layer are sequentially arranged on an array substrate, and a common electrode layer is arranged on a side of the electrophoretic layer away from the array substrate. The peep-proof function layer is only located in the peep-proof region. When the electronic paper display panel is switched to a peep-proof state, the array substrate and the common electrode layer drive the electrophoretic layer in the peep-proof region to absorb or reflect light, so as to display a picture. When the electronic paper display panel is switched to a sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing region to absorb or reflect light, so as to display a picture. Through the above design, the use scene of the electronic paper display panel can be enriched, and the thickness of the electronic paper display panel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an electronic paper display panel, a control method thereof and an electronic paper display device. BACKGROUND

[0002] Adding a peep-proof function to the electronic paper display panel can prevent others from peeping at the reading content or sensitive notifications. For example, when the electronic paper display panel is used in public places, the electronic paper display panel can switch to a peep-proof mode through a key, limit the visual angle to within ±30°, protect the user's privacy, and prevent third parties from peeping.

[0003] However, the existing electronic paper display panel capable of switching between the peep-proof mode and the sharing mode needs two electrophoretic layers to achieve the switching, thereby resulting in a large thickness of the electronic paper display panel capable of switching between the peep-proof mode and the sharing mode. SUMMARY

[0004] The present application aims to provide an electronic paper display panel, a control method thereof and an electronic paper display device, which enrich the use scenarios of the electronic paper display panel and reduce the thickness of the electronic paper display panel.

[0005] The present application discloses an electronic paper display panel, which comprises a plurality of pixel unit regions, each of which comprises a peep-proof region and a sharing region. The electronic paper display panel comprises an array substrate, an electrophoretic layer, a peep-proof function layer and a common electrode layer. The electrophoretic layer and the peep-proof function layer are sequentially arranged on the array substrate, and the common electrode layer is arranged on the side of the electrophoretic layer away from the array substrate. The peep-proof function layer is only located in the peep-proof region.

[0006] When the electronic paper display panel is switched to a peep-proof state, the array substrate and the common electrode layer drive the electrophoretic layer in the peep-proof region to absorb or reflect light, so as to display a picture.

[0007] When the electronic paper display panel is switched to a sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing region to absorb or reflect light, so as to display a picture.

[0008] Optionally, the electrophoretic layer comprises at least one first driving barrier, at least one second driving barrier and a plurality of light control units. The first driving barrier and the second driving barrier are both arranged on the array substrate. The first driving barrier is located on the side of the peep-proof region away from the sharing region, and the second driving barrier is located on the side of the sharing region away from the peep-proof region. The light control units are located between the first driving barrier and the second driving barrier, and a plurality of the light control units correspond to a plurality of the pixel unit regions one by one.

[0009] The first driving barrier wall and the second driving barrier wall are configured to drive the light control unit to move between the privacy area and the sharing area.

[0010] Optionally, each column of the pixel unit area is provided with a first driving barrier wall and a second driving barrier wall on both sides.

[0011] Optionally, the first driving barrier wall comprises a first signal line, a first insulating layer and a first driving electrode wall, and the second driving barrier wall comprises a second signal line, a second insulating layer and a second driving electrode wall.

[0012] The first signal line and the second signal line are arranged on the array substrate, the first insulating layer is arranged on the first signal line, the first driving electrode wall is arranged on the first insulating layer, and the first driving electrode wall is connected with the first signal line through a via hole; the second insulating layer is arranged on the second signal line, the second driving electrode wall is arranged on the second insulating layer, and the second driving electrode wall is connected with the second signal line through a via hole.

[0013] Optionally, the first driving barrier wall comprises a first signal line, a first insulating layer and a first driving electromagnetic wall, and the second driving barrier wall comprises a second signal line, a second insulating layer and a second driving electromagnetic wall.

[0014] The first signal line and the second signal line are arranged on the array substrate, the first insulating layer is arranged on the first signal line, the first driving electromagnetic wall is arranged on the first insulating layer, and the first driving electromagnetic wall is connected with the first signal line through a via hole; the second insulating layer is arranged on the second signal line, the second driving electromagnetic wall is arranged on the second insulating layer, and the second driving electromagnetic wall is connected with the second signal line through a via hole.

[0015] Optionally, the light control unit comprises microcapsules, the microcapsules are provided with light reflecting electrophoretic particles and light absorbing electrophoretic particles; the total charge amount of the light reflecting electrophoretic particles is greater than the total charge amount of the light absorbing electrophoretic particles; or the total charge amount of the light reflecting electrophoretic particles is less than the total charge amount of the light absorbing electrophoretic particles.

[0016] Optionally, the total number of the light reflecting electrophoretic particles is greater than the total number of the light absorbing electrophoretic particles; or the total number of the light reflecting electrophoretic particles is less than the total number of the light absorbing electrophoretic particles.

[0017] The application also discloses a control method of the electronic paper display panel, which is used for controlling the electronic paper display panel.

[0018] When the electronic paper display panel is switched to the anti-peeping state, the electrophoretic layer in the anti-peeping area is driven to absorb or reflect light to display a picture.

[0019] When the electronic paper display panel is switched to the sharing state, the electrophoretic layer in the sharing area is driven to absorb or reflect light to display a picture.

[0020] Optionally, the electrophoretic layer comprises at least one first driving barrier, at least one second driving barrier and a plurality of light control units.

[0021] The step of driving the electrophoretic layer in the anti-peeping area to absorb or reflect light to display a picture when the electronic paper display panel is switched to the anti-peeping state comprises the following steps:

[0022] When the electronic paper display panel is switched to the anti-peeping state, the light control units are driven to move into the anti-peeping area.

[0023] The electrophoretic layer in the anti-peeping area is driven to absorb or reflect light to display a picture.

[0024] The step of driving the electrophoretic layer in the sharing area to absorb or reflect light to display a picture when the electronic paper display panel is switched to the sharing state comprises the following steps:

[0025] When the electronic paper display panel is switched to the sharing state, the light control units are driven to move into the sharing area.

[0026] The electrophoretic layer in the sharing area is driven to absorb or reflect light to display a picture.

[0027] The application also discloses an electronic paper display device, which comprises a driving circuit and an electronic paper display panel.

[0028] Compared with the prior art, the electronic paper display panel provided by the application can realize the switching between the privacy display and the sharing display by dividing a pixel unit region into a privacy region and a sharing region, driving the electrophoretic layer in the privacy region to absorb or reflect light to display a picture when the electronic paper display panel is switched to a privacy state, and driving the electrophoretic layer in the sharing region to absorb or reflect light to display a picture when the electronic paper display panel is switched to a sharing state. Thus, the switching between the privacy display and the sharing display can be realized by using only a single-layer electrophoretic layer and without setting a switchable control privacy function layer, the use scenarios of the electronic paper display panel are enriched, and the thickness of the electronic paper display panel is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and constitute a part of the specification, illustrate the embodiments of the application and together with the text of the specification serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. In the drawings:

[0030] Figure 1 is a schematic diagram of an electronic paper display device according to an embodiment of the application;

[0031] Figure 2 is a schematic diagram of an electronic paper display panel in a privacy state according to a first embodiment of the application;

[0032] Figure 3 is a schematic diagram of an electronic paper display panel in a sharing state according to the first embodiment of the application;

[0033] Figure 4 is a schematic diagram of a first data line and a second data line according to the first embodiment of the application;

[0034] Figure 5 is a schematic diagram of a third data line according to the first embodiment of the application;

[0035] Figure 6 is a schematic diagram of a first driving barrier wall and a second driving barrier wall arranged on both sides of a display region according to the first embodiment of the application;

[0036] Figure 7 is a schematic diagram of a first driving barrier wall and a second driving barrier wall arranged on both sides of each pixel unit region according to the first embodiment of the application;

[0037] Figure 8is a schematic diagram of an electronic paper display panel of a second embodiment of the present application;

[0038] Figure 9 is a schematic diagram of a control method of an electronic paper display panel of an embodiment of the present application;

[0039] Figure 10 is a schematic diagram of a control method of a light control unit of an embodiment of the present application.

[0040] wherein, 10, electronic paper display device; 20, driving circuit; 30, state switching control module; 40, electronic paper display panel; 50, pixel unit area; 51, anti-peep area; 52, sharing area; 60, display area; 100, array substrate; 110, active switch layer; 111, active switch; 112, anti-peep active switch; 113, sharing active switch; 120, pixel electrode layer; 121, pixel electrode; 122, anti-peep pixel electrode; 123, sharing pixel electrode; 131, first data line; 132, second data line; 133, third data line; 141, first scan line; 142, second scan line;

[0041] 200, electrophoretic layer;

[0042] 210, first driving barrier wall; 211, first signal line; 212, first insulating layer; 213, first driving electrode wall; 214, first driving electromagnetic wall;

[0043] 220, second driving barrier wall; 221, second signal line; 222, second insulating layer; 223, second driving electrode wall; 224, second driving electromagnetic wall;

[0044] 300, light control unit; 310, microcapsule; 320, light reflecting electrophoretic particle; 330, light absorbing electrophoretic particle; 400, anti-peep function layer; 410, grating structure; 500, common electrode layer; 600, light shielding layer. DETAILED DESCRIPTION

[0045] It needs to be understood that the terms used here, the specific structure and function details of the disclosure, are only for describing specific embodiments, are representative, but the present application can be embodied by many alternative forms, and should not be interpreted as being limited to the embodiments described here.

[0046] In the description of the present application, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "plurality" is two or more. The term "comprise" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can exist or be added.

[0047] In addition, the terms indicating the orientation or positional relationship of "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are described based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and cannot be understood as indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0048] In addition, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The present application will be described in detail below with reference to the drawings and optional embodiments.

[0050] Figure 1 is a schematic diagram of an electronic paper display device according to an embodiment of the present application, as Figure 1 As shown in the figure, the present application discloses an electronic paper display device 10, which comprises a driving circuit 20 and an electronic paper display panel 40, the driving circuit 20 and the electronic paper display panel 40 are connected, and used for driving the electronic paper display panel 40 to display a picture.

[0051] The present application also discloses an electronic paper display panel 40, which can be used in the above-mentioned electronic paper display device 10, and for the electronic paper display panel 40, the present application provides the following design, and is specifically introduced through several embodiments:

[0052] Embodiment 1:

[0053] Figure 2 is a schematic diagram of an electronic paper display panel in a privacy state according to a first embodiment of the present application, Figure 3This is a schematic diagram of an electronic paper display panel in a sharing state according to the first embodiment of this application, as shown below. Figures 2-3 As shown, this application also discloses an electronic paper display panel 40, which includes a plurality of pixel unit regions 50. Each pixel unit region 50 includes a privacy protection region 51 and a sharing region 52. The electronic paper display panel 40 includes an array substrate 100, an electrophoretic layer 200, a privacy protection functional layer 400, and a common electrode layer 500. The electrophoretic layer 200 and the privacy protection functional layer 400 are sequentially disposed on the array substrate 100. The common electrode layer 500 is disposed on the side of the electrophoretic layer 200 facing away from the array substrate 100. The privacy protection functional layer 400 is located only within the privacy protection region 51.

[0054] When the electronic paper display panel 40 is switched to the privacy mode, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light in order to display the image.

[0055] The absorption or reflection of light by the electrophoretic layer 200 can be understood as loading the display voltage of the next frame onto the array substrate 100 and the common electrode layer 500 of the privacy protection area 51.

[0056] When the electronic paper display panel 40 switches to the sharing state, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light in order to display an image.

[0057] The absorption or reflection of light by the electrophoretic layer 200 can be understood as loading the display voltage of the next frame onto the array substrate 100 and the common electrode layer 500 of the sharing area 52.

[0058] One pixel unit region 50 can be used to display one sub-pixel, or it can be used to display two adjacent sub-pixels. In other words, one sub-pixel can be defined as one pixel unit region 50, or two adjacent sub-pixels can be defined as one pixel unit region 50; there is no limitation here. When one pixel unit region 50 is used to display two adjacent sub-pixels, one sub-pixel is a privacy protection region 51, and the other sub-pixel is a sharing region 52. When one pixel unit region 50 is used to display one sub-pixel, part of the sub-pixel's area is the privacy protection region 51, and the other part is the sharing region 52.

[0059] Compared with the existing electronic paper display panel scheme, the electronic paper display panel 40 of the present application can switch the array substrate 100 and the common electrode layer 500 to drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light to display a picture when the electronic paper display panel 40 is switched to a privacy state, and drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light to display a picture when the electronic paper display panel 40 is switched to a sharing state, so that only a single-layer electrophoretic layer 200 is used, and a switchable control privacy function layer 400 is not needed, thereby realizing the switching use of privacy display and sharing display, enriching the use scenarios of the electronic paper display panel 40, and reducing the thickness of the electronic paper display panel 40.

[0060] The privacy function layer 400 includes a grating structure 410, which is arranged on the array substrate 100, and the grating structure 410 is located only in the privacy area 51; of course, the privacy function layer 400 also includes other structures that can make most of the light going out of the privacy area 51 be vertical light, such as a plurality of stacked light refraction structures, which refract large-angle light into vertical light.

[0061] The common electrode layer 500 can be located between the electrophoretic layer 200 and the privacy function layer 400, and when the grating structure 410 uses a material that does not shield the electric field formed between the common electrode layer 500 and the array substrate 100, such as a non-metal material, the common electrode layer 500 can also be arranged on the side of the privacy function layer 400 away from the electrophoretic layer 200.

[0062] Figure 4 is a schematic diagram of a first data line and a second data line of the first embodiment of the present application, Figure 5 is a schematic diagram of a third data line of the first embodiment of the present application, in combination with Figure 4 and Figure 5 As shown in the drawings, the array substrate 100 includes an active switch layer 110 and a pixel electrode layer 120, the pixel electrode layer 120 is arranged on the side of the active switch layer 110 close to the electrophoretic layer 200, the active switch layer 110 includes a plurality of active switches 111, and the pixel electrode layer 120 includes a plurality of pixel electrodes 121, and the pixel electrodes 121 are connected with the active switches 111.

[0063] One pixel unit area 50 can be provided with only one pixel electrode 121 to control the privacy area 51 and the sharing area 52 at the same time; two pixel electrodes 121 can also be provided in one pixel unit area 50 to control the sharing area 52 and the privacy area 51 respectively.

[0064] Two pixel electrodes 121 and two active switches 111 are provided in each pixel unit area 50 of the application. When two pixel electrodes 121 are provided in one pixel unit area 50, the pixel electrode 121 includes a privacy pixel electrode 122 and a sharing pixel electrode 123. The privacy pixel electrode 122 is located in the privacy area 51, and the sharing pixel electrode 123 is located in the sharing area 52. The active switch 111 in the corresponding pixel unit area 50 also includes two active switches 111, which are defined as a privacy active switch 112 and a sharing active switch 113. The privacy active switch 112 is connected to the privacy pixel electrode 122, and the sharing active switch 113 is connected to the sharing pixel electrode 123.

[0065] The array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light to display a picture, which can be understood as loading the display voltage of the next frame of picture into the pixel electrode 121 in the privacy area 51, i.e. the privacy pixel electrode 122. The array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light to display a picture, which can be understood as loading the display voltage of the next frame of picture into the pixel electrode 121 in the sharing area 52, i.e. the sharing pixel electrode 123.

[0066] The active switch layer 110 further includes a first data line 131, a second data line 132, a first scan line 141, and a second scan line 142. The first scan line 141 is connected to the gate of the privacy active switch 112, the first data line 131 is connected to the source of the privacy active switch 112, and the drain of the privacy active switch 112 is connected to the privacy pixel electrode 122.

[0067] The second scan line 142 is connected to the gate of the sharing active switch 113, the second data line 132 is connected to the source of the sharing active switch 113, and the drain of the sharing active switch 113 is connected to the sharing pixel electrode 123.

[0068] In brief, the opening and closing of the privacy active switch 112 is controlled by the first scan line 141, and the privacy pixel electrode 122 is charged by the first data line 131; the opening and closing of the sharing active switch 113 is controlled by the second scan line 142, and the sharing pixel electrode 123 is charged by the second data line 132. Thus, when the privacy mode and the sharing mode need to be switched, the first scan line 141 and the first data line 131 or the second scan line 142 and the second data line 132 are controlled.

[0069] Thus, when the electronic paper display panel 40 is switched to the privacy state, the privacy pixel electrode 122 is charged by opening the privacy active switch 112 on the array substrate 100, and the electrophoretic layer 200 in the privacy area 51 can be driven to absorb or reflect light to display a picture.

[0070] When the electronic paper display panel 40 is switched to the sharing state, the sharing pixel electrode 123 is charged by opening the sharing active switch 113 on the array substrate 100, and the electrophoretic layer 200 in the sharing area 52 can be driven to absorb or reflect light to display a picture.

[0071] Referring to Figure 5 Of course, the active switch layer 110 further includes a third data line 133, a first scan line 141 and a second scan line 142. The first scan line 141 is connected with the gate of the privacy active switch 112, the third data line 133 is connected with the source of the privacy active switch 112, and the drain of the privacy active switch 112 is connected with the privacy pixel electrode 122. The second scan line 142 is connected with the gate of the sharing active switch 113, the third data line 133 is connected with the source of the sharing active switch 113, and the drain of the sharing active switch 113 is connected with the sharing pixel electrode 123.

[0072] In brief, the opening and closing of the privacy active switch 112 is controlled by the first scan line 141, the opening and closing of the sharing active switch 113 is controlled by the second scan line 142, and the privacy pixel electrode 122 and the sharing pixel electrode 123 are charged by the first data line 131, respectively. Thus, when the privacy mode and the sharing mode need to be switched, the first scan line 141 and the third data line 133 or the second scan line 142 and the third data line 133 are controlled.

[0073] In this way, when the electronic paper display panel 40 is switched to the privacy state, only the privacy active switch 112 on the array substrate 100 needs to be opened to charge the privacy pixel electrode 122, so as to drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light, thereby displaying a picture.

[0074] When the electronic paper display panel 40 is switched to the sharing state, only the sharing active switch 113 on the array substrate 100 needs to be opened to charge the sharing pixel electrode 123, so as to drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light, thereby displaying a picture. The number of data lines can be reduced, and the aperture ratio of the electronic paper display panel 40 can be improved.

[0075] Figure 6 is a schematic view of the first embodiment of the present application, in which first driving barriers and second driving barriers are arranged on both sides of the display area, Figure 7 is a schematic view of the first embodiment of the present application, in which first driving barriers and second driving barriers are arranged on both sides of each pixel unit area, in combination with Figure 6 and Figure 7 As shown in the figures, the electrophoretic layer 200 includes at least one first driving barrier 210, at least one second driving barrier 220, and a plurality of light control units 300. The first driving barrier 210 and the second driving barrier 220 are arranged on the array substrate 100. The first driving barrier 210 is located on the side of the privacy area 51 away from the sharing area 52, and the second driving barrier 220 is located on the side of the sharing area 52 away from the privacy area 51. The light control units 300 are located between the first driving barrier 210 and the second driving barrier 220, and a plurality of the light control units 300 correspond to a plurality of the pixel unit areas 50 one by one. The first driving barrier 210 and the second driving barrier 220 are used to drive the light control units 300 to move between the privacy area 51 and the sharing area 52.

[0076] In this embodiment, when switched to the privacy mode, all the light control units 300 ideally move to the privacy area 51, and there is no light control unit 300 between the pixel electrode 121 and the common electrode layer 500 of the sharing area 52; when switched to the sharing mode, all the light control units 300 ideally move to the sharing area 52, and there is no light control unit 300 between the pixel electrode 121 and the common electrode layer 500 of the privacy area 51. This prevents some light control units 300 from not moving.

[0077] Therefore, in the display stage after switching to the privacy mode, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light, so as to display a picture, and the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light, so as to prevent interference with the display picture.

[0078] In the display stage after switching to the sharing mode, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light, so as to display a picture, and the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the privacy area 51 to reflect light, so as to prevent interference with the brightness of the display picture.

[0079] The light control unit 300 is used to reflect or absorb external light, so as to realize picture display of the electronic paper display panel 40. In other words, when the sharing area 52 and the privacy area 51 are arranged in a transverse direction, the first driving barrier wall 210 and the second driving barrier wall 220 are respectively located on the left and right sides of the light control unit 300, the light control unit 300 is controlled to move left and right, and the light control unit 300 moves between the privacy area 51 and the sharing area 52.

[0080] When the sharing area 52 and the privacy area 51 are arranged in a longitudinal direction, the first driving barrier wall 210 and the second driving barrier wall 220 are respectively located on the upper and lower sides of the light control unit 300, the light control unit 300 is controlled to move up and down, and the light control unit 300 moves between the privacy area 51 and the sharing area 52. The sharing area 52 and the privacy area 51 in the electronic paper display panel 40 of the present application are exemplified by being arranged in a transverse direction.

[0081] Referring to Figure 6 It is possible to arrange the first driving barrier wall 210 and the second driving barrier wall 220 on both sides of the light control unit 300. For example, the first driving barrier wall 210 and the second driving barrier wall 220 are arranged on both sides of the display area 60, so as to reduce the difficulty of preparation, the difficulty of control, the preparation cost of the electronic paper display panel 40, and improve the yield of the electronic paper display panel 40. The plurality of pixel unit areas 50 form the display area 60.

[0082] And the array substrate 100 in the embodiment is further provided with a light shielding layer 600 corresponding to the sharing area 52, the light shielding layer 600 corresponds to the sharing area 52, and the light shielding layer 600 is arranged on the side of the sharing pixel electrode 123 close to the light control unit 300, so that the light from the outside is prevented from being reflected through the sharing area 52 in the anti-peeping mode, and the contrast of the electronic paper display panel 40 is improved.

[0083] Referring to Figure 7 Of course, since the light control unit 300 is arranged in each pixel unit area 50, the first driving barrier wall 210 and the second driving barrier wall 220 are arranged on both sides of each column of pixel unit areas 50, and the first driving barrier wall 210 and the second driving barrier wall 220 are arranged on both sides of each column of pixel unit areas 50. The light control unit 300 in the middle of the display area 60 moves slowly, and the problem of the moving speed of the area beside it is fast.

[0084] The embodiment drives the light control unit 300 to move in the form of forming an electric field between the first driving barrier wall 210 and the second driving barrier wall 220, that is, the first driving barrier wall 210 includes a first signal line 211, a first insulating layer 212 and a first driving electrode wall 213, and the second driving barrier wall 220 includes a second signal line 221, a second insulating layer 222 and a second driving electrode wall 223.

[0085] The first signal line 211 and the second signal line 221 are arranged on the array substrate 100, the first insulating layer 212 is arranged on the first signal line 211, the first driving electrode wall 213 is arranged on the first insulating layer 212, and the first driving electrode wall 213 is connected with the first signal line 211 through a via hole; the second insulating layer 222 is arranged on the second signal line 221, the second driving electrode wall 223 is arranged on the second insulating layer 222, and the second driving electrode wall 223 is connected with the second signal line 221 through a via hole.

[0086] The electronic paper display device 10 further includes a state switching control module 30, and the state switching control module 30 is used for outputting a control voltage to the first signal line 211 and the second signal line 221.

[0087] For example, when the electronic paper display panel 40 is switched to the anti-peeping state, the state switching control module 30 inputs a first control voltage to the first signal line 211 and inputs a second control voltage to the second signal line 221, so that the light control unit 300 moves to the anti-peeping area 51 under the action of the first control voltage and the second control voltage.

[0088] Exemplarily, when the electronic paper display panel 40 is switched to the sharing state, the state switching control module 30 inputs a second control voltage to the first signal line 211 and inputs a first control voltage to the second signal line 221, so that the light control unit 300 moves to the sharing area 52 under the action of the first control voltage and the second control voltage.

[0089] Moreover, after driving the light control unit 300 to move to the position, the state switching control module 30 does not need to output the voltage, at this time, the electric field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 disappears.

[0090] The first signal line 211 and the second signal line 221 are used to transmit the voltage output by the state switching control module 30 to the first driving electrode wall 213 and the second driving electrode wall 223.

[0091] The light control unit 300 of the present application is exemplified by a capsule-encapsulated electrophoretic particle, that is, the light control unit 300 comprises a microcapsule 310, the microcapsule 310 is provided with light-reflecting electrophoretic particles 320 and light-absorbing electrophoretic particles 330; the total charge amount of the light-reflecting electrophoretic particles 320 is greater than the total charge amount of the light-absorbing electrophoretic particles 330; or the total charge amount of the light-reflecting electrophoretic particles 320 is less than the total charge amount of the light-absorbing electrophoretic particles 330.

[0092] In other words, the total charge amount of the light-reflecting electrophoretic particles 320 and the total charge amount of the light-absorbing electrophoretic particles 330 are not equal, so that a single electrophoretic particle can move left and right under the electric field formed between the first driving electrode wall 213 and the second driving electrode wall 223. Avoid the phenomenon that the capsule cannot move in the sharing area 52 and the privacy area 51.

[0093] Possibly, the total number of the light-reflecting electrophoretic particles 320 is greater than the total number of the light-absorbing electrophoretic particles 330; or the total number of the light-reflecting electrophoretic particles 320 is less than the total number of the light-absorbing electrophoretic particles 330. Thus, the total charge amount of the light-reflecting electrophoretic particles 320 and the total charge amount of the light-absorbing electrophoretic particles 330 are not equal. By changing the number, the way to make the total charge amount of the light-reflecting electrophoretic particles 320 and the total charge amount of the light-absorbing electrophoretic particles 330 not equal does not need to change the charge amount of the light-reflecting electrophoretic particles 320 and the charge amount of the light-absorbing electrophoretic particles 330, which is more convenient for the preparation of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330.

[0094] For example, the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 in one capsule have equal electric charges, and the number of the light-reflecting electrophoretic particles 320 is greater than that of the light-absorbing electrophoretic particles 330 in one capsule. The number control is simpler than the electric charge control.

[0095] For example, the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 in one capsule have equal electric charges, and the number of the light-reflecting electrophoretic particles 320 is less than that of the light-absorbing electrophoretic particles 330 in one capsule. The number control is simpler than the electric charge control.

[0096] For example, the number of the light-reflecting electrophoretic particles 320 and the number of the light-absorbing electrophoretic particles 330 in one capsule are equal, and the electric charge of the light-reflecting electrophoretic particles 320 is greater than that of the light-absorbing electrophoretic particles 330 in one capsule. The electric charge control does not affect the display effect of the display panel.

[0097] For example, the number of the light-reflecting electrophoretic particles 320 and the number of the light-absorbing electrophoretic particles 330 in one capsule are equal, and the electric charge of the light-reflecting electrophoretic particles 320 is less than that of the light-absorbing electrophoretic particles 330 in one capsule. The electric charge control does not affect the display effect of the display panel.

[0098] For example, the number of the light-reflecting electrophoretic particles 320 is greater than that of the light-absorbing electrophoretic particles 330 in one capsule, and the electric charge of the light-reflecting electrophoretic particles 320 is greater than that of the light-absorbing electrophoretic particles 330 in one capsule, which can improve the moving speed of the light control unit 300.

[0099] For example, the number of the light-reflecting electrophoretic particles 320 is less than that of the light-absorbing electrophoretic particles 330 in one capsule, and the electric charge of the light-reflecting electrophoretic particles 320 is less than that of the light-absorbing electrophoretic particles 330 in one capsule, which can improve the moving speed of the light control unit 300.

[0100] Embodiment 2

[0101] Figure 8 is a schematic diagram of an electronic paper display panel according to a second embodiment of the present application, which is different from the first embodiment in that a magnetic field is formed between the first driving barrier wall 210 and the second driving barrier wall 220 to drive the light control unit 300 to move. Figure 8

[0102] ​The first driving barrier wall 210 comprises a first signal line 211, a first insulating layer 212 and a first driving electromagnetic wall 214, and the second driving barrier wall 220 comprises a second signal line 221, a second insulating layer 222 and a second driving electromagnetic wall 224.

[0103] The first signal line 211 and the second signal line 221 are arranged on the array substrate 100, the first insulating layer 212 is arranged on the first signal line 211, the first driving electromagnetic wall 214 is arranged on the first insulating layer 212, and the first driving electromagnetic wall 214 is connected with the first signal line 211 through a via; the second insulating layer 222 is arranged on the second signal line 221, the second driving electromagnetic wall 224 is arranged on the second insulating layer 222, and the second driving electromagnetic wall 224 is connected with the second signal line 221 through a via.

[0104] The magnetic particles in the microcapsules 310 can be driven to move in the magnetic field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, so that the microcapsules 310 can be driven to move in the sharing area 52 and the privacy area 51 by the movement of the magnetic particles in the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224.

[0105] The light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 can also be added with magnetic materials, so that the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 have magnetism, and the movement of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 with magnetism in the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 can drive the microcapsules 310 to move in the sharing area 52 and the privacy area 51.

[0106] The light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 can also be added with magnetic materials, so that the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 have magnetism, and the movement of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 with magnetism in the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 can drive the microcapsules 310 to move in the sharing area 52 and the privacy area 51.

[0107] The specific saturation magnetization of the sodium alginate composite material is about 6.85 A·m²·kg -1 The diameter of the microcapsules 310 is about 50 μm, so the radius r of the microcapsules 310 is 25 μm = 2.5 × 10 -5 m.

[0108] Therefore, according to the volume formula V = 4 / 3πr3 , the volume of the microcapsule 310 is calculated to be equal to 4 / 3π(2.5x10 -5 ) 3 =6.545x10 -14 m 3 The magnetic field gradient formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 is about 1T / m, and according to F=V*χ*▽B, F=6.545x10 -14 m 3 *6*1T / m, wherein the specific saturation magnetization is approximated to be 6 from 6.85 for convenience of calculation, and the actual value thereof should be the magnetic susceptibility of the sodium alginate composite material 6.85, and F=3.927x10 -13 N is calculated, and it is calculated that the force acting on the microcapsule 310 in the magnetic field is about 3.927x10 -13 N. Since the microcapsule 310 is only subjected to the magnetic field force in the horizontal direction, the force is sufficient to cause the microcapsule 310 to move significantly.

[0109] When the electronic paper display panel 40 is switched to the privacy state, the state switching control module 30 inputs a first control voltage to the first signal line 211 and inputs a second control voltage to the second signal line 221, so that a magnetic field is formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, and the light control unit 300 is moved to the privacy area 51 under the action of the magnetic field; when the electronic paper display panel 40 is switched to the sharing state, the state switching control module 30 inputs the second control voltage to the first signal line 211 and inputs the first control voltage to the second signal line 221, so that a reverse magnetic field is formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, and the light control unit 300 is moved to the sharing area 52 under the action of the first control voltage and the second control voltage.

[0110] Moreover, after the light control unit 300 is driven to move to the position, the state switching control module 30 does not need to output the voltage, and at this time, the magnetic field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 disappears.

[0111] Figure 9 is a schematic diagram of a control method of an electronic paper display panel according to an embodiment of the present application, Figure 10 is a schematic diagram of a control method of a light control unit according to an embodiment of the present application, as shown in Figures 9-10 The present application further discloses a control method of an electronic paper display panel 40, which is used for controlling the electronic paper display panel 40, and includes the following steps:

[0112] S1: driving the electrophoretic layer in the privacy area to absorb or reflect light to display a picture when the electronic paper display panel switches to a privacy state;

[0113] S2: driving the electrophoretic layer in the sharing area to absorb or reflect light to display a picture when the electronic paper display panel switches to a sharing state.

[0114] The control method of the electronic paper display panel 40 of the present application can drive the electrophoretic layer 200 in the privacy area 51 to absorb or reflect light to display a picture when the electronic paper display panel 40 switches to a privacy state, and drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light to display a picture when the electronic paper display panel 40 switches to a sharing state, so that only a single-layer electrophoretic layer 200 is used, and a switchable control privacy function layer 400 is not needed, thereby achieving the switching use of privacy display and sharing display, enriching the use scenarios of the electronic paper display panel 40, and reducing the thickness of the electronic paper display panel 40.

[0115] The electrophoretic layer 200 includes at least one first driving barrier wall 210, at least one second driving barrier wall 220, and a plurality of light control units 300; the first driving barrier wall 210 and the second driving barrier wall 220 are both arranged on the array substrate 100, the first driving barrier wall 210 is located on the side of the privacy area 51 away from the sharing area 52, the second driving barrier wall 220 is located on the side of the sharing area 52 away from the privacy area 51, the light control unit 300 is located between the first driving barrier wall 210 and the second driving barrier wall 220, and a plurality of the light control units 300 correspond to a plurality of the pixel unit areas 50 one by one; the first driving barrier wall 210 and the second driving barrier wall 220 are used to drive the light control unit 300 to move between the privacy area 51 and the sharing area 52.

[0116] S1: driving the electrophoretic layer in the privacy area to absorb or reflect light to display a picture when the electronic paper display panel switches to a privacy state;

[0117] S11: driving the light control unit to move into the privacy area when the electronic paper display panel switches to a privacy state;

[0118] S12: driving the electrophoretic layer in the privacy area to absorb or reflect light to display a picture;

[0119] S2: driving the electrophoretic layer in the sharing area to absorb or reflect light to display a picture when the electronic paper display panel switches to the sharing state, comprising:

[0120] S21: driving the light control unit to move into the sharing area when the electronic paper display panel switches to the sharing state;

[0121] S22: driving the electrophoretic layer in the sharing area to absorb or reflect light to display a picture.

[0122] Exemplarily, the light control unit 300 can be driven to move in the form of an electric field formed between the first driving barrier wall 210 and the second driving barrier wall 220. When the electronic paper display panel 40 switches to the privacy state, the state switching control module 30 inputs a first control voltage to the first signal line 211 and a second control voltage to the second signal line 221, so that the light control unit 300 moves to the privacy area 51 under the action of the first control voltage and the second control voltage. When the electronic paper display panel 40 switches to the sharing state, the state switching control module 30 inputs the second control voltage to the first signal line 211 and the first control voltage to the second signal line 221, so that the light control unit 300 moves to the sharing area 52 under the action of the first control voltage and the second control voltage.

[0123] Exemplarily, the light control unit 300 can be driven to move in the form of a magnetic field formed between the first driving barrier wall 210 and the second driving barrier wall 220. When the electronic paper display panel 40 switches to the privacy state, the state switching control module 30 inputs a first control voltage to the first signal line 211 and a second control voltage to the second signal line 221, so that a magnetic field is formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, and the light control unit 300 moves to the privacy area 51 under the action of the magnetic field. When the electronic paper display panel 40 switches to the sharing state, the state switching control module 30 inputs the second control voltage to the first signal line 211 and the first control voltage to the second signal line 221, so that a reverse magnetic field is formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, and the light control unit 300 moves to the sharing area 52 under the action of the first control voltage and the second control voltage.

[0124] It should be noted that the steps involved in the present scheme are not limited to the order of execution, as long as the specific scheme can be implemented, and should be considered within the scope of the present application.

[0125] It should be noted that the inventive concept of the present application can form a very large number of embodiments, but the length of the application file is limited and cannot list them one by one, so the above described embodiments or technical features can be combined to form new embodiments without conflict, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0126] The above is a further detailed description of the present application in combination with specific optional embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. An electronic paper display panel, characterized by, The electronic paper display panel comprises a plurality of pixel unit regions, each of the pixel unit regions comprises a privacy region and a sharing region, the electronic paper display panel comprises an array substrate, an electrophoretic layer, a privacy function layer and a common electrode layer, the electrophoretic layer and the privacy function layer are sequentially arranged on the array substrate, and the common electrode layer is arranged on a side of the electrophoretic layer away from the array substrate; the privacy function layer is only located in the privacy region; The electrophoretic layer comprises at least one first driving barrier wall, at least one second driving barrier wall and a plurality of light control units, the first driving barrier wall and the second driving barrier wall are both arranged on the array substrate, the first driving barrier wall is located on a side of the privacy region away from the sharing region, the second driving barrier wall is located on a side of the sharing region away from the privacy region, and the light control units are located between the first driving barrier wall and the second driving barrier wall, and a plurality of the light control units correspond to a plurality of the pixel unit regions one by one; The first driving barrier wall and the second driving barrier wall are used for driving the light control units to move between the privacy region and the sharing region; When the electronic paper display panel is switched to a privacy state, the array substrate and the common electrode layer drive the electrophoretic layer in the privacy region to absorb or reflect light, so as to display a picture; When the electronic paper display panel is switched to a sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing region to absorb or reflect light, so as to display a picture.

2. The electronic paper display panel of claim 1, wherein, First driving barrier walls and second driving barrier walls are arranged on both sides of each column of the pixel unit regions.

3. The electronic paper display panel according to claim 1 or 2, characterized in that, The first driving barrier wall comprises a first signal line, a first insulating layer and a first driving electrode wall, and the second driving barrier wall comprises a second signal line, a second insulating layer and a second driving electrode wall; The first signal line and the second signal line are both arranged on the array substrate, the first insulating layer is arranged on the first signal line, the first driving electrode wall is arranged on the first insulating layer, and the first driving electrode wall is connected with the first signal line through a via hole; the second insulating layer is arranged on the second signal line, the second driving electrode wall is arranged on the second insulating layer, and the second driving electrode wall is connected with the second signal line through a via hole.

4. The electronic paper display panel of claim 1 or 2, wherein, The first driving barrier wall comprises a first signal line, a first insulating layer and a first driving electromagnetic wall, and the second driving barrier wall comprises a second signal line, a second insulating layer and a second driving electromagnetic wall; The first signal line and the second signal line are both arranged on the array substrate, the first insulating layer is arranged on the first signal line, the first driving electromagnetic wall is arranged on the first insulating layer, and the first driving electromagnetic wall is connected with the first signal line through a via hole; the second insulating layer is arranged on the second signal line, the second driving electromagnetic wall is arranged on the second insulating layer, and the second driving electromagnetic wall is connected with the second signal line through a via hole.

5. The electronic paper display panel of claim 3, wherein, The light control unit comprises microcapsules, the microcapsules are provided with light-reflecting electrophoretic particles and light-absorbing electrophoretic particles; the total charge amount of the light-reflecting electrophoretic particles is greater than the total charge amount of the light-absorbing electrophoretic particles; or the total charge amount of the light-reflecting electrophoretic particles is less than the total charge amount of the light-absorbing electrophoretic particles.

6. The electronic paper display panel of claim 5, wherein, The total number of the light-reflecting electrophoretic particles is greater than the total number of the light-absorbing electrophoretic particles; or the total number of the light-reflecting electrophoretic particles is less than the total number of the light-absorbing electrophoretic particles. 7.A method for controlling an electronic paper display panel, characterized by, The control method of the electronic paper display panel is used for controlling the electronic paper display panel according to any one of claims 1-6, and comprises: When the electronic paper display panel is switched to the anti-peeping state, the electrophoretic layer in the anti-peeping area is driven to absorb or reflect light to display a picture; When the electronic paper display panel is switched to the sharing state, the electrophoretic layer in the sharing area is driven to absorb or reflect light to display a picture. 8.The method of Claim 7, wherein The electrophoretic layer comprises at least one first driving barrier, at least one second driving barrier, and a plurality of light control units; The step of driving the electrophoretic layer in the anti-peeping area to absorb or reflect light to display a picture when the electronic paper display panel is switched to the anti-peeping state comprises: When the electronic paper display panel is switched to the anti-peeping state, the light control units are driven to move into the anti-peeping area; The electrophoretic layer in the anti-peeping area is driven to absorb or reflect light to display a picture; The step of driving the electrophoretic layer in the sharing area to absorb or reflect light to display a picture when the electronic paper display panel is switched to the sharing state comprises: When the electronic paper display panel is switched to the sharing state, the light control units are driven to move into the sharing area; The electrophoretic layer in the sharing area is driven to absorb or reflect light to display a picture.

9. An electronic paper display device, characterized by comprising: The electronic paper display device comprises a driving circuit and the electronic paper display panel according to any one of claims 1-5, the driving circuit and the electronic paper display panel are connected, and are used for driving the electronic paper display panel to display a picture.

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