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

Abstract

The invention discloses an electronic paper display panel, 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 areas, each pixel unit area comprises a peep-proof area and a sharing area, an electrophoresis layer and a peep-proof function layer are sequentially arranged on an array substrate, and the sharing area is arranged on the array substrate. The common electrode layer is arranged on the side, away from the array substrate, of the electrophoresis layer; the peep-proof functional layer is only located in the peep-proof area; when the electronic paper display panel is switched to a peep-proof state, the array substrate and the common electrode layer drive the electrophoresis layer in the peep-proof area 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 electrophoresis layer in the sharing area to absorb or reflect light so as to display a picture. Through the design, the thickness of the electronic paper display panel can be reduced while the use scene of the electronic paper display panel is enriched.

Description

Technical Field

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

[0002] Adding an anti-peeping function to the e-paper display panel can prevent others from peeping at reading content or sensitive notifications. For example, when the e-paper display panel is used in a public place, the e-paper display panel can switch to anti-peeping mode with one click, limiting the viewing angle to within ±30°, protecting user privacy and preventing third parties from peeping.

[0003] However, the existing electronic paper display panel that can switch between the anti-peeping mode and the sharing mode requires two electrophoretic layers to achieve this, resulting in a relatively large thickness of the electronic paper display panel that can switch between the anti-peeping mode and the sharing mode. Summary of the Invention

[0004] The purpose of this application is to provide an electronic paper display panel and a control method thereof, and an electronic paper display device, which enrich the use scenarios of the electronic paper display panel while reducing the thickness of the electronic paper display panel.

[0005] The present application discloses an electronic paper display panel, comprising a plurality of pixel unit regions, each of which comprises an anti-privacy region and a shared region. The electronic paper display panel comprises an array substrate, an electrophoretic layer, an anti-privacy functional layer, and a common electrode layer. The electrophoretic layer and the anti-privacy functional layer are sequentially arranged on the array substrate, and the common electrode layer is arranged on a side of the electrophoretic layer facing away from the array substrate. The anti-privacy functional layer is located only in the anti-privacy region. When the electronic paper display panel is switched to an anti-peeping state, the array substrate and the common electrode layer drive the electrophoretic layer in the anti-peeping area to absorb or reflect light to display an image; When the electronic paper display panel switches to a sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing area to absorb or reflect light to display an image.

[0006] Optionally, the electrophoretic layer includes at least one first driving barrier wall, at least one second driving barrier wall, and a plurality of light control units, wherein the first driving barrier wall and the second driving barrier wall are both provided on the array substrate, the first driving barrier wall is located on a side of the privacy protection area away from the shared area, the second driving barrier wall is located on a side of the shared area away from the privacy protection area, the light control unit is located between the first driving barrier wall and the second driving barrier wall, and the plurality of light control units correspond one-to-one to the plurality of pixel unit areas; The first driving barrier and the second driving barrier are used to drive the light control unit to move between the privacy protection area and the sharing area.

[0007] Optionally, a first driving barrier wall and a second driving barrier wall are provided on both sides of each column of the pixel unit area.

[0008] Optionally, the first driving barrier comprises a first signal line, a first insulating layer and a first driving electrode wall, and the second driving barrier 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 to the first signal line through a via; 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 to the second signal line through a via.

[0009] Optionally, the first driving barrier comprises a first signal line, a first insulating layer and a first driving electromagnetic wall, and the second driving barrier 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 to the first signal line through a via; 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 to the second signal line through a via.

[0010] Optionally, the light control unit includes a microcapsule, in which light-reflecting electrophoretic particles and light-absorbing electrophoretic particles are arranged; the total charge of the light-reflecting electrophoretic particles is greater than the total charge of the light-absorbing electrophoretic particles; or the total charge of the light-reflecting electrophoretic particles is less than the total charge of the light-absorbing electrophoretic particles.

[0011] 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.

[0012] The present application also discloses a control method for an electronic paper display panel, the control method for an electronic paper display panel being used to control the electronic paper display panel, and the control method for an electronic paper display panel comprising: 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 an image; When the electronic paper display panel switches to the sharing state, the electrophoretic layer in the sharing area is driven to absorb or reflect light to display an image.

[0013] Optionally, the electrophoretic layer includes at least one first driving barrier, at least one second driving barrier and a plurality of light control units; When the electronic paper display panel is switched to the anti-peeping state, the step of driving the electrophoretic layer in the anti-peeping area to absorb or reflect light to display an image includes: When the electronic paper display panel switches to the anti-peeping state, driving the light control unit to move into the anti-peeping area; driving the electrophoretic layer in the privacy protection area to absorb or reflect light to display an image; When the electronic paper display panel switches to the sharing state, the step of driving the electrophoretic layer in the sharing area to absorb or reflect light to display an image includes: When the electronic paper display panel switches to a sharing state, driving the light control unit to move into a sharing area; The electrophoretic layer in the shared area is driven to absorb or reflect light to display an image.

[0014] The present application also discloses an electronic paper display device, which includes a driving circuit and an electronic paper display panel. The driving circuit is connected to the electronic paper display panel and is used to drive the electronic paper display panel to display an image.

[0015] Compared with the existing electronic paper display panel solutions, the electronic paper display panel of the present application divides a pixel unit area into an anti-peeping area and a sharing area. When the electronic paper display panel is switched to the anti-peeping state, the array substrate and the common electrode layer drive the electrophoretic layer in the anti-peeping area to absorb or reflect light to display the picture; when the electronic paper display panel is switched to the sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing area to absorb or reflect light to display the picture. In this way, only a single-layer electrophoretic layer is used, and there is no need to set a switchable control anti-peeping function layer, thereby realizing the switching between anti-peeping display and shared display, enriching the usage scenarios of the electronic paper display panel while reducing the thickness of the electronic paper display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings: Figure 1 is a schematic diagram of an electronic paper display device according to an embodiment of the present application; Figure 2 is a schematic diagram of an electronic paper display panel in an anti-peeping state according to the first embodiment of the present application; Figure 3 is a schematic diagram of an electronic paper display panel in a sharing state according to the first embodiment of the present application; Figure 4 This is a schematic diagram of a first data line and a second data line according to the first embodiment of the present application; Figure 5 is a schematic diagram of a third data line according to the first embodiment of the present application; Figure 6 This is a schematic diagram of a first driving retaining wall and a second driving retaining wall provided on both sides of a display area according to a first embodiment of the present application; Figure 7 This is a schematic diagram of a first embodiment of the present application in which a first driving barrier wall and a second driving barrier wall are provided on both sides of each pixel unit area; Figure 8 is a schematic diagram of an electronic paper display panel according to a second embodiment of the present application; 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 This is a schematic diagram of a control method of a light control unit according to an embodiment of the present application.

[0017] Among them, 10, electronic paper display device; 20, driving circuit; 30, state switching control module; 40, electronic paper display panel; 50, pixel unit area; 51, anti-peeping area; 52, sharing area; 60, display area; 100, array substrate; 110, active switch layer; 111, active switch; 112, anti-peeping active switch; 113, sharing active switch; 120, pixel electrode layer; 121, pixel electrode; 122, anti-peeping 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; 200, electrophoretic layer; 210, first driving barrier wall; 211, first signal line; 212, first insulating layer; 213, first driving electrode wall; 214, first driving electromagnetic wall; 220, second driving barrier wall; 221, second signal line; 222, second insulating layer; 223, second driving electrode wall; 224, second driving electromagnetic wall; 300, light control unit; 310, microcapsule; 320, light-reflecting electrophoretic particles; 330, light-absorbing electrophoretic particles; 400, anti-peeping functional layer; 410, grating structure; 500, common electrode layer; 600, light-shielding layer. DETAILED DESCRIPTION

[0018] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or implicitly specify the quantity of the technical features indicated. Therefore, unless otherwise specified, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features; "plurality" means two or more. The term "comprising" and any variations thereof are intended to be non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0020] In addition, terms indicating orientation or positional relationships such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside” are described based on the orientation or relative positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0021] Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0022] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0023] Figure 1 is a schematic diagram of an electronic paper display device according to an embodiment of the present application. Figure 1 As shown, the present application discloses an electronic paper display device 10, which includes a driving circuit 20 and an electronic paper display panel 40. The driving circuit 20 is connected to the electronic paper display panel 40 to drive the electronic paper display panel 40 to display an image.

[0024] This application also discloses an electronic paper display panel 40, which can be used in the electronic paper display device 10 described above. For the electronic paper display panel 40, this application provides the following design, which is specifically introduced through several embodiments: Example 1: Figure 2 is a schematic diagram of an electronic paper display panel in an anti-peeping state according to the first embodiment of the present application. Figure 3 is a schematic diagram of an electronic paper display panel in a sharing state according to the first embodiment of the present application. Figure 2-Figure 3 As shown, the present application also discloses an electronic paper display panel 40, which includes a plurality of pixel unit areas 50, each of which includes an anti-peeping area 51 and a sharing area 52. The electronic paper display panel 40 includes an array substrate 100, an electrophoretic layer 200, an anti-peeping functional layer 400 and a common electrode layer 500. The electrophoretic layer 200 and the anti-peeping functional layer 400 are sequentially arranged on the array substrate 100, the common electrode layer 500 is arranged on the side of the electrophoretic layer 200 away from the array substrate 100, and the anti-peeping functional layer 400 is only located in the anti-peeping area 51.

[0025] When the electronic paper display panel 40 switches to the anti-peeping state, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display an image.

[0026] The absorption or reflection of light by the electrophoretic layer 200 can be understood as loading the display voltage of the next frame of the picture onto the array substrate 100 and the common electrode layer 500 in the privacy protection area 51 .

[0027] 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 to display an image.

[0028] The absorption or reflection of light by the electrophoretic layer 200 can be understood as loading the display voltage of the next frame of image onto the array substrate 100 and the common electrode layer 500 in the shared area 52 .

[0029] Among them, one pixel unit area 50 can be used to display one sub-pixel, and of course it can also be used to display two adjacent sub-pixels. In other words, one sub-pixel can be defined as one pixel unit area 50, and two adjacent sub-pixels can also be defined as one pixel unit area 50. There is no limitation here. When one pixel unit area 50 is used to display two adjacent sub-pixels, one sub-pixel is the anti-privacy area 51 and the other sub-pixel is the shared area 52. When one pixel unit area 50 is used to display one sub-pixel, part of the sub-pixel area is the anti-privacy area 51, and the other part of the sub-pixel area is the shared area 52.

[0030] Compared with the existing electronic paper display panel solutions, the electronic paper display panel 40 of the present application divides a pixel unit area 50 into an anti-peeping area 51 and a sharing area 52. When the electronic paper display panel 40 is switched to the anti-peeping state, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display the picture; when the electronic paper display panel 40 is switched 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 to display the picture. In this way, only a single-layer electrophoretic layer 200 is used, and there is no need to set a switchable control anti-peeping function layer 400, thereby realizing the switching between anti-peeping display and sharing display, enriching the usage scenarios of the electronic paper display panel 40 while reducing the thickness of the electronic paper display panel 40.

[0031] The anti-peeping functional layer 400 includes a grating structure 410, which is arranged on the array substrate 100 and is only located within the anti-peeping area 51; of course, the anti-peeping functional layer 400 also includes other structures that can make most of the light exiting the anti-peeping area 51 vertical light, such as a multi-layered light refraction structure, which refracts large-angle light into vertical light through the multi-layered light refraction structure.

[0032] The common electrode layer 500 can be located between the electrophoretic layer 200 and the anti-peek function layer 400. 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-metallic material, the common electrode layer 500 can also be set on the side of the anti-peek function layer 400 away from the electrophoretic layer 200.

[0033] Figure 4 This is a schematic diagram of a first data line and a second data line according to the first embodiment of the present application. Figure 5This is a schematic diagram of a third data line in the first embodiment of the present application, combined with Figure 4 and Figure 5 As shown, the array substrate 100 includes an active switching layer 110 and a pixel electrode layer 120. The pixel electrode layer 120 is arranged on a side of the active switching layer 110 close to the electrophoretic layer 200. The active switching layer 110 includes a plurality of active switches 111. The pixel electrode layer 120 includes a plurality of pixel electrodes 121. The pixel electrodes 121 are connected to the active switches 111.

[0034] Only one pixel electrode 121 may be provided in a pixel unit area 50 to control both the privacy protection area 51 and the shared area 52 ; or two pixel electrodes 121 may be provided in a pixel unit area 50 to control the shared area 52 and the privacy protection area 51 respectively.

[0035] In the present application, two pixel electrodes 121 and two active switches 111 are provided in each pixel unit area 50. When two pixel electrodes 121 are provided in a pixel unit area 50, that is, the pixel electrode 121 includes an anti-peeping pixel electrode 122 and a shared pixel electrode 123, the anti-peeping pixel electrode 122 is located in the anti-peeping area 51, and the shared pixel electrode 123 is located in the shared area 52. The active switch 111 in the corresponding pixel unit area 50 also includes two active switches 111, which are defined as an anti-peeping active switch 112 and a shared active switch 113, respectively. The anti-peeping active switch 112 is connected to the anti-peeping pixel electrode 122, and the shared active switch 113 is connected to the shared pixel electrode 123.

[0036] Among them, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display the picture, which can be understood as loading the display voltage of the next frame of the picture into the pixel electrode 121 in the anti-peeping area 51, that is, the anti-peeping pixel electrode 122; the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the shared area 52 to absorb or reflect light to display the picture, which can be understood as loading the display voltage of the next frame of the picture into the pixel electrode 121 in the shared area 52, that is, the shared pixel electrode 123.

[0037] 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 anti-peeping active switch 112, the first data line 131 is connected to the source of the anti-peeping active switch 112, and the drain of the anti-peeping active switch 112 is connected to the anti-peeping pixel electrode 122.

[0038] The second scan line 142 is connected to the gate of the shared active switch 113 , the second data line 132 is connected to the source of the shared active switch 113 , and the drain of the shared active switch 113 is connected to the shared pixel electrode 123 .

[0039] In simple terms, the first scan line 141 is used to control the opening and closing of the anti-peeping active switch 112, and the first data line 131 is used to charge the anti-peeping pixel electrode 122; the second scan line 142 is used to control the opening and closing of the sharing active switch 113, and the second data line 132 is used to charge the sharing pixel electrode 123. In this way, when switching between the anti-peeping mode and the sharing mode is required, only the first scan line 141 and the first data line 131 or the second scan line 142 and the second data line 132 need to be used for control.

[0040] In this way, when the electronic paper display panel 40 is switched to the anti-peeping state, it is only necessary to turn on the anti-peeping active switch 112 on the array substrate 100 to charge the anti-peeping pixel electrode 122, so as to drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display the picture.

[0041] When the electronic paper display panel 40 switches to the sharing state, it only needs to turn on the sharing active switch 113 on the array substrate 100 to charge the shared pixel electrode 123, so as to drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light to display the image.

[0042] See also Figure 5 Of course, it is also possible that the active switch layer 110 further includes a third data line 133, a first scan line 141, and a second scan line 142, wherein the first scan line 141 is connected to the gate of the anti-peeping active switch 112, the third data line 133 is connected to the source of the anti-peeping active switch 112, and the drain of the anti-peeping active switch 112 is connected to the anti-peeping pixel electrode 122; the second scan line 142 is connected to the gate of the shared active switch 113, the third data line 133 is connected to the source of the shared active switch 113, and the drain of the shared active switch 113 is connected to the shared pixel electrode 123.

[0043] In simple terms, the first scan line 141 is used to control the opening and closing of the anti-peeping active switch 112, and the second scan line 142 is used to control the opening and closing of the sharing active switch 113. The first data line 131 is used to charge the anti-peeping pixel electrode 122 and the sharing pixel electrode 123 respectively. In this way, when switching between the anti-peeping mode and the sharing mode is required, it is only necessary to control the first scan line 141 and the third data line 133 or the second scan line 142 and the third data line 133.

[0044] In this way, when the electronic paper display panel 40 is switched to the anti-peeping state, it is only necessary to turn on the anti-peeping active switch 112 on the array substrate 100 to charge the anti-peeping pixel electrode 122, so as to drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display the picture.

[0045] When the electronic paper display panel 40 switches to the sharing mode, simply turning on the sharing active switch 113 on the array substrate 100 to charge the shared pixel electrode 123 drives the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light, thereby displaying an image. This reduces the number of data lines and improves the aperture ratio of the electronic paper display panel 40.

[0046] Figure 6 1 is a schematic diagram of a first driving retaining wall and a second driving retaining wall provided on both sides of a display area according to a first embodiment of the present application. Figure 7 This is a schematic diagram of a first embodiment of the present application in which a first driving barrier wall and a second driving barrier wall are provided on both sides of each pixel unit area, combined with Figure 6 and Figure 7 As shown, 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 both arranged on the array substrate 100. The first driving barrier 210 is located on the side of the anti-peeping 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 anti-peeping area 51. The light control unit 300 is located between the first driving barrier 210 and the second driving barrier 220. The plurality of light control units 300 correspond one-to-one to the plurality of pixel unit areas 50. The first driving barrier 210 and the second driving barrier 220 are used to drive the light control unit 300 to move between the anti-peeping area 51 and the sharing area 52.

[0047] In this embodiment, when the privacy protection mode is switched, all light control units 300 ideally move to the privacy protection area 51, leaving no light control units 300 between the pixel electrodes 121 and the common electrode layer 500 in the shared area 52. When the sharing mode is switched, all light control units 300 ideally move to the shared area 52, leaving no light control units 300 between the pixel electrodes 121 and the common electrode layer 500 in the privacy protection area 51. This prevents some light control units 300 from not moving.

[0048] Therefore, in the display stage after switching to the anti-peep mode, the array substrate 100 and the common electrode layer 500 can be controlled to drive the electrophoretic layer 200 in the anti-peep area 51 to absorb or reflect light to display the picture, and the array substrate 100 and the common electrode layer 500 can be controlled to drive the electrophoretic layer 200 in the shared area 52 to absorb reflected light to prevent interference with the display picture.

[0049] In the display stage after switching to the sharing mode, the array substrate 100 and the common electrode layer 500 can be controlled to drive the electrophoretic layer 200 in the sharing area 52 to absorb or reflect light to display the picture, and the array substrate 100 and the common electrode layer 500 can be controlled to drive the electrophoretic layer in the anti-peep area 51 to reflect light to prevent the brightness of the display picture from being affected.

[0050] The light control unit 300 is used to reflect or absorb external light, thereby realizing the display of the electronic paper display panel 40. In other words, when the sharing area 52 and the anti-privacy area 51 are arranged horizontally, the first driving baffle 210 and the second driving baffle 220 are respectively located on the left and right sides of the light control unit 300, controlling the left and right movement of the light control unit 300 to realize the movement of the light control unit 300 between the anti-privacy area 51 and the sharing area 52.

[0051] When the sharing area 52 and the anti-peeping area 51 are arranged vertically, the first driven baffle 210 and the second driven baffle 220 are respectively located on the upper and lower sides of the light control unit 300, controlling the light control unit 300 to move up and down, thereby enabling the light control unit 300 to move between the anti-peeping area 51 and the sharing area 52. The sharing area 52 and the anti-peeping area 51 in the electronic paper display panel 40 of the present application are illustrated with a horizontal arrangement.

[0052] See also Figure 6Alternatively, a first driving barrier 210 and a second driving barrier 220 may be provided on both sides of the plurality of light control units 300. For example, the first driving barrier 210 and the second driving barrier 220 may be provided only on both sides of the display area 60, thereby reducing the difficulty of manufacturing, reducing the difficulty of control, reducing the manufacturing cost of the electronic paper display panel 40, and improving the yield of the electronic paper display panel 40. The plurality of pixel unit regions 50 form the display area 60.

[0053] In addition, in this embodiment, a light-shielding layer 600 is further provided on the array substrate 100 at a position corresponding to the shared area 52. The light-shielding layer 600 corresponds to the shared area 52. For example, the light-shielding layer 600 can be provided on a side of the shared pixel electrode 123 close to the light control unit 300 to prevent external light from being reflected through the shared area 52 when in anti-peep mode, thereby improving the contrast of the electronic paper display panel 40.

[0054] See also Figure 7 Of course, since each pixel unit area 50 is provided with a light control unit 300, this embodiment can also provide a first driving barrier 210 and a second driving barrier 220 on both sides of each column of pixel unit areas 50. Each column of pixel unit areas 50 is provided with a first driving barrier 210 and a second driving barrier 220 on both sides. This avoids the problem of the light control unit 300 in the middle of the display area 60 moving slowly while the light control unit 300 in the adjacent areas moves quickly.

[0055] In this embodiment, an electric field is formed between the first driving barrier 210 and the second driving barrier 220 to drive the light control unit 300 to move, that is, the first driving barrier 210 includes a first signal line 211, a first insulating layer 212 and a first driving electrode wall 213, and the second driving barrier 220 includes a second signal line 221, a second insulating layer 222 and a second driving electrode wall 223.

[0056] The first signal line 211 and the second signal line 221 are both 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 to the first signal line 211 through a via; 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 to the second signal line 221 through a via.

[0057] The electronic paper display device 10 further includes a state switching control module 30 , which is configured to output a control voltage to the first signal line 211 and the second signal line 221 .

[0058] Exemplarily, when the electronic paper display panel 40 switches 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.

[0059] Exemplarily, 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 inputs 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.

[0060] Moreover, after the driving light control unit 300 is moved to a position, the state switching control module 30 no longer needs to output voltage. At this time, the electric field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 disappears.

[0061] 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 .

[0062] The light control unit 300 of the present application is demonstrated using capsule-encapsulated electrophoretic particles as an example, that is, the light control unit 300 includes a microcapsule 310, and the microcapsule 310 is provided with light-reflecting electrophoretic particles 320 and light-absorbing electrophoretic particles 330; the total charge of the light-reflecting electrophoretic particles 320 is greater than the total charge of the light-absorbing electrophoretic particles 330; or the total charge of the light-reflecting electrophoretic particles 320 is less than the total charge of the light-absorbing electrophoretic particles 330.

[0063] In other words, the total charge of the light-reflecting electrophoretic particles 320 is not equal to the total charge of the light-absorbing electrophoretic particles 330, allowing a single electrophoretic particle to move left and right under the electric field formed between the first drive electrode wall 213 and the second drive electrode wall 223. This prevents the capsule from being unable to move between the shared area 52 and the privacy protection area 51.

[0064] Alternatively, the total number of the light-reflecting electrophoretic particles 320 may be greater than the total number of the light-absorbing electrophoretic particles 330, or the total number of the light-reflecting electrophoretic particles 320 may be less than the total number of the light-absorbing electrophoretic particles 330. This results in the total charge of the light-reflecting electrophoretic particles 320 being unequal to the total charge of the light-absorbing electrophoretic particles 330. By varying the number, the total charge of the light-reflecting electrophoretic particles 320 and the total charge of the light-absorbing electrophoretic particles 330 are made unequal, without requiring changes to the charge of the light-reflecting electrophoretic particles 320 and the charge of the light-absorbing electrophoretic particles 330, thereby facilitating the preparation of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330.

[0065] For example, the charges of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 in a capsule are equal, and the number of the light-reflecting electrophoretic particles 320 in a capsule is greater than the number of the light-absorbing electrophoretic particles 330. Controlling the number is simpler than controlling the charge.

[0066] For example, the charges of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 in a capsule are equal, and the number of the light-reflecting electrophoretic particles 320 in a capsule is less than the number of the light-absorbing electrophoretic particles 330. Controlling the number is simpler than controlling the charge.

[0067] For example, the number of light-reflecting electrophoretic particles 320 and the number of light-absorbing electrophoretic particles 330 in a capsule are equal, and the charge of the light-reflecting electrophoretic particles 320 in a capsule is greater than the charge of the light-absorbing electrophoretic particles 330. Controlling the charge will not affect the display effect of the display panel compared to controlling the quantity.

[0068] For example, the number of light-reflecting electrophoretic particles 320 and the number of light-absorbing electrophoretic particles 330 in a capsule are equal, and the charge of the light-reflecting electrophoretic particles 320 in a capsule is less than the charge of the light-absorbing electrophoretic particles 330. Controlling the charge will not affect the display effect of the display panel compared to controlling the quantity.

[0069] For example, the number of light-reflecting electrophoretic particles 320 in a capsule is greater than the number of light-absorbing electrophoretic particles 330 , and the charge of the light-reflecting electrophoretic particles 320 in a capsule is greater than the charge of the light-absorbing electrophoretic particles 330 , which can increase the moving speed of the light control unit 300 .

[0070] For example, the number of light-reflecting electrophoretic particles 320 in a capsule is smaller than the number of light-absorbing electrophoretic particles 330 , and the charge of the light-reflecting electrophoretic particles 320 in a capsule is smaller than the charge of the light-absorbing electrophoretic particles 330 , which can increase the moving speed of the light control unit 300 .

[0071] Example 2: Figure 8 is a schematic diagram of an electronic paper display panel according to the second embodiment of the present application. Figure 8 As shown, different from the first embodiment, this embodiment adopts a form of forming a magnetic field between the first driving barrier 210 and the second driving barrier 220 to drive the light control unit 300 to move.

[0072] The first driving barrier 210 includes a first signal line 211 , a first insulating layer 212 , and a first driving electromagnetic wall 214 . The second driving barrier 220 includes a second signal line 221 , a second insulating layer 222 , and a second driving electromagnetic wall 224 .

[0073] The first signal line 211 and the second signal line 221 are both 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 to 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 to the second signal line 221 through a via.

[0074] Among them, driving the microcapsule 310 to move in the magnetic field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 can be achieved by adding magnetic particles in the microcapsule 310, and the movement of the magnetic particles in the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 enables the microcapsule 310 to move in the sharing area 52 and the anti-peeping area 51.

[0075] For example, magnetic materials can also be added to the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 so that the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 have magnetism. The light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330 with magnetism move in the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 to enable the microcapsule 310 to move in the sharing area 52 and the anti-peeping area 51.

[0076] For example, magnetic materials such as sodium alginate or magnetic chitosan materials can be added when preparing the microcapsule 310, so that the microcapsule 310 can move in the magnetic field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224, thereby realizing the movement of the microcapsule 310 in the sharing area 52 and the anti-peeping area 51 without affecting the position of the light-reflecting electrophoretic particles 320 and the light-absorbing electrophoretic particles 330, thereby improving the response speed of the electronic paper display panel 40.

[0077] Among them, the specific saturation magnetization intensity of sodium alginate composite material is about 6.85A·m²·kg -1 , the diameter of the microcapsule 310 is about 50 μm, so the radius of the microcapsule 310 is r = 25 μm = 2.5×10 -5 m.

[0078] Then according to the volume formula V=4 / 3πr 3 , the volume of microcapsule 310 is calculated to be 4 / 3π (2.5×10 -5 ) 3 =6.545×10 -14 m 3 The magnetic field gradient formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 is about 1 T / m. According to F=V*χ*▽B, F=6.545×10 -14 m 3 *6*1T / m, where the saturation magnetization is approximated to 6 from 6.85 for the convenience of calculation. In fact, the magnetic susceptibility here should be 6.85 of the sodium alginate composite material. The calculated F=3.927×10 -13 N, and the force on the microcapsule 310 in the magnetic field is calculated to be approximately 3.927×10 -13 N, since the microcapsule 310 is only subjected to the magnetic field force in the horizontal direction, this force is sufficient to cause the microcapsule 310 to move significantly.

[0079] 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 a second control voltage to the second signal line 221, so that a magnetic field is formed between the first driven electromagnetic wall 214 and the second driven electromagnetic wall 224, so that the light control unit 300 moves to the anti-peeping 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 a second control voltage to the first signal line 211 and a first control voltage to the second signal line 221, so that a reverse magnetic field is formed between the first driven electromagnetic wall 214 and the second driven electromagnetic wall 224, 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.

[0080] Moreover, after the driving light control unit 300 is moved to a position, the state switching control module 30 no longer needs to output voltage. At this time, the magnetic field formed between the first driving electromagnetic wall 214 and the second driving electromagnetic wall 224 disappears.

[0081] 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. Figure 9-10 As shown, the present application further discloses a control method for an electronic paper display panel 40, the control method for the electronic paper display panel 40 is used to control the electronic paper display panel 40, and the control method for the electronic paper display panel 40 includes: S1: 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 an image; S2: When the electronic paper display panel switches to the sharing state, the electrophoretic layer in the sharing area is driven to absorb or reflect light to display an image.

[0082] The control method of the electronic paper display panel 40 of the present application divides a pixel unit area 50 into an anti-peeping area 51 and a sharing area 52. When the electronic paper display panel 40 is switched to the anti-peeping state, the array substrate 100 and the common electrode layer 500 drive the electrophoretic layer 200 in the anti-peeping area 51 to absorb or reflect light to display a picture; when the electronic paper display panel 40 is switched 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 to display a picture. In this way, only a single-layer electrophoretic layer 200 is used, and there is no need to set a switchable control anti-peeping function layer 400, thereby realizing the switching between anti-peeping display and sharing display, enriching the usage scenarios of the electronic paper display panel 40 while reducing the thickness of the electronic paper display panel 40.

[0083] 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 both arranged on the array substrate 100, the first driving barrier 210 is located on the side of the anti-peeping area 51 away from the sharing area 52, the second driving barrier 220 is located on the side of the sharing area 52 away from the anti-peeping area 51, the light control unit 300 is located between the first driving barrier 210 and the second driving barrier 220, and the plurality of light control units 300 correspond one-to-one to the plurality of pixel unit areas 50; the first driving barrier 210 and the second driving barrier 220 are used to drive the light control unit 300 to move between the anti-peeping area 51 and the sharing area 52.

[0084] S1: When the electronic paper display panel is switched to the anti-peeping state, the step of driving the electrophoretic layer in the anti-peeping area to absorb or reflect light to display an image includes: S11: When the electronic paper display panel switches to the anti-peeping state, driving the light control unit to move into the anti-peeping area; S12: driving the electrophoretic layer in the privacy protection area to absorb or reflect light to display an image; S2: When the electronic paper display panel switches to the sharing state, the step of driving the electrophoretic layer in the sharing area to absorb or reflect light to display an image includes: S21: When the electronic paper display panel switches to a sharing state, driving the light control unit to move into a sharing area; S22: driving the electrophoretic layer in the shared area to absorb or reflect light to display an image.

[0085] Exemplarily, the light control unit 300 can be driven to move by forming an electric field between the first drive baffle 210 and the second drive baffle 220. 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 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; 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 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.

[0086] Exemplarily, the light control unit 300 can be driven to move by forming a magnetic field between the first drive barrier 210 and the second drive barrier 220. 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 a second control voltage to the second signal line 221, so that a magnetic field is formed between the first drive electromagnetic wall 214 and the second drive electromagnetic wall 224, so that the light control unit 300 moves to the anti-peeping 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 a second control voltage to the first signal line 211 and a first control voltage to the second signal line 221, so that a reverse magnetic field is formed between the first drive electromagnetic wall 214 and the second drive electromagnetic wall 224, 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.

[0087] It should be noted that the limitations on the steps involved in this solution do not limit the order of the steps without affecting the implementation of the specific solution. The steps written in front can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0088] It should be noted that the inventive concept of this application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0089] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. An electronic paper display panel, characterized in that: The electronic paper display panel includes a plurality of pixel unit areas, each of which includes an anti-privacy area and a shared area. The electronic paper display panel includes an array substrate, an electrophoretic layer, an anti-privacy functional layer, and a common electrode layer. The electrophoretic layer and the anti-privacy functional 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 anti-privacy functional layer is only located in the anti-privacy area. When the electronic paper display panel is switched to an anti-peeping state, the array substrate and the common electrode layer drive the electrophoretic layer in the anti-peeping area to absorb or reflect light to display an image; When the electronic paper display panel switches to a sharing state, the array substrate and the common electrode layer drive the electrophoretic layer in the sharing area to absorb or reflect light to display an image.

2. The electronic paper display panel according to claim 1, wherein: The electrophoretic layer includes 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 provided on the array substrate. The first driving barrier is located on a side of the privacy protection area away from the shared area, and the second driving barrier is located on a side of the shared area away from the privacy protection area. The light control unit is located between the first driving barrier and the second driving barrier. The plurality of light control units correspond one-to-one to the plurality of pixel unit areas. The first driving barrier and the second driving barrier are used to drive the light control unit to move between the privacy protection area and the sharing area.

3. The electronic paper display panel according to claim 2, wherein: A first driving barrier and a second driving barrier are provided on both sides of each column of the pixel unit area.

4. The electronic paper display panel according to claim 2 or 3, characterized in that: The first driving barrier comprises a first signal line, a first insulating layer and a first driving electrode wall, and the second driving barrier 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 to the first signal line through a via; 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 to the second signal line through a via.

5. The electronic paper display panel according to claim 2 or 3, characterized in that: The first driving barrier comprises a first signal line, a first insulating layer and a first driving electromagnetic wall, and the second driving barrier 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 to the first signal line through a via; 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 to the second signal line through a via.

6. The electronic paper display panel according to claim 4, wherein: The light control unit includes a microcapsule, in which light-reflecting electrophoretic particles and light-absorbing electrophoretic particles are arranged; the total charge of the light-reflecting electrophoretic particles is greater than the total charge of the light-absorbing electrophoretic particles; or the total charge of the light-reflecting electrophoretic particles is less than the total charge of the light-absorbing electrophoretic particles.

7. The electronic paper display panel according to claim 6, 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.

8. A method for controlling an electronic paper display panel, characterized in that: The control method of the electronic paper display panel is used to control the electronic paper display panel, and the control method of the electronic paper display panel includes: 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 an image; When the electronic paper display panel switches to the sharing state, the electrophoretic layer in the sharing area is driven to absorb or reflect light to display an image.

9. The control method of the electronic paper display panel according to claim 8, characterized in that: The electrophoretic layer includes at least one first driving barrier, at least one second driving barrier and a plurality of light control units; When the electronic paper display panel is switched to the anti-peeping state, the step of driving the electrophoretic layer in the anti-peeping area to absorb or reflect light to display an image includes: When the electronic paper display panel switches to the anti-peeping state, driving the light control unit to move into the anti-peeping area; driving the electrophoretic layer in the privacy protection area to absorb or reflect light to display an image; When the electronic paper display panel switches to the sharing state, the step of driving the electrophoretic layer in the sharing area to absorb or reflect light to display an image includes: When the electronic paper display panel switches to a sharing state, driving the light control unit to move into a sharing area; The electrophoretic layer in the shared area is driven to absorb or reflect light to display an image.

10. An electronic paper display device, characterized in that: The electronic paper display device includes a driving circuit and the electronic paper display panel according to any one of claims 1 to 6, wherein the driving circuit is connected to the electronic paper display panel and is used to drive the electronic paper display panel to display an image.

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