Handwriting panel, handwriting device and control method of handwriting device

Abstract

This application provides a handwriting panel, a handwriting device, and a control method for the handwriting device, belonging to the technical field of handwriting devices. The handwriting panel includes a first substrate, a second substrate, and a liquid crystal layer disposed between the two substrates. Pixel electrodes are provided on the first substrate, and a common electrode is provided on the second substrate. It also includes a positioning layer with a grid pattern formed by the intersection of the first electrode leads and the second electrode leads, and an isolation cavity located at the intersection of the two electrode leads. The isolation cavity cuts off the two electrode leads respectively. Magnetic conductive particles are provided within the isolation cavity. After being attracted by the magnetic force of an eraser, the magnetic conductive particles can detach from the isolation cavity, thereby disconnecting the circuits of the two electrode leads. After the attraction is removed, the magnetic conductive particles can move back into the isolation cavity. This handwriting panel can achieve local wiping functionality without the need for a corresponding infrared device, reducing the overall thickness, and has no requirements on the shape of the eraser.

Description

Technical Field

[0001] This application belongs to the field of handwriting device technology, and particularly relates to handwriting panels, handwriting devices, and control methods for handwriting devices. Background Technology

[0002] Currently, with the increasing application of dye-based liquid crystal writing tablets, people have higher and higher requirements for their performance, especially for the local erasing function of dye-based liquid crystal writing tablets in order to facilitate modification during writing.

[0003] Currently, partial erasure functionality is generally achieved using infrared sensing positioning principles. This involves adding infrared emitting and receiving devices to the edge to locate the eraser. However, adding infrared emitting and receiving devices increases the overall thickness of the LCD panel and imposes certain requirements on the shape of the eraser. Summary of the Invention

[0004] In view of the above-mentioned technical problems existing in the prior art, this application provides a handwriting panel, a handwriting device, and a control method for the handwriting device. The handwriting panel can realize the local wiping function without the need to set up a corresponding infrared device, reducing the overall thickness, and there are no requirements on the shape of the eraser.

[0005] The technical solution adopted in the embodiments of this application is:

[0006] A handwriting panel includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the two substrates. The first substrate has a pixel electrode layer, and the second substrate has a common electrode layer. The handwriting panel further includes a positioning layer disposed between the two substrates. The positioning layer is located on the side of the liquid crystal layer opposite to the second substrate. The positioning layer has a grid line formed by the intersection of the first electrode lead and the second electrode lead, and an isolation cavity located at the intersection of the two electrode leads. The isolation cavity cuts off the two electrode leads respectively, and the isolation cavity contains magnetic conductive particles that enable the circuits of the two electrode leads to be respectively connected. After being attracted by the magnetic force of an eraser, the magnetic conductive particles can detach from the isolation cavity to disconnect the circuits of the two electrode leads respectively. After the attraction force is removed, the magnetic conductive particles can move into the isolation cavity.

[0007] Furthermore, the handwriting panel also includes a magnetic film layer, which is located on the side of the positioning layer opposite to the second substrate. The magnetic film layer is used to attract the magnetic conductive particles so that the magnetic conductive particles are placed in the isolation cavity.

[0008] Furthermore, the magnetic absorbing film layer and the positioning layer are respectively disposed on the first substrate, the positioning layer is located on the side of the first substrate facing the second substrate, and the magnetic absorbing film layer is located on the side of the first substrate away from the second substrate.

[0009] Furthermore, the handwriting panel also includes a background layer, which is disposed on the magnetic film layer and located on the side of the magnetic film layer opposite to the first substrate.

[0010] Furthermore, the positioning layer includes a first non-metallic layer, an electrode layer, and a second non-metallic layer stacked together. The electrode layer is disposed between the two non-metallic layers. The first non-metallic layer is disposed on the first substrate. The electrode layer is separated from the second substrate by the second non-metallic layer. The grid lines form the electrode layer. The second non-metallic layer is provided with a clearance cavity opposite to the isolation cavity. The magnetic conductive particles can enter the clearance cavity after leaving the isolation cavity.

[0011] Furthermore, the isolation cavity is also provided with a carrier liquid, and the magnetic conductive particles are located in the carrier liquid.

[0012] Furthermore, the magnetically conductive particles are any one of iron, copper, and nickel;

[0013] And / or, the carrier fluid is silicone oil or polyester;

[0014] And / or, the magnetic film layer is a garnet-type ferrite film.

[0015] A handwriting device, comprising:

[0016] A handwriting panel as described in any of the above embodiments;

[0017] A magnetic eraser is used to wipe the area to be wiped on the handwriting panel against the second substrate. The magnetic eraser can generate an attractive force on the magnetic conductive particles so that they can be moved out of the isolation cavity.

[0018] The control component is electrically connected to the two electrode leads, the pixel electrode layer, and the common electrode layer, respectively. The control component is used to locate the open circuit area of ​​the two electrode leads and apply a pixel voltage to the pixel electrode in the pixel electrode layer corresponding to the open circuit area.

[0019] Furthermore, the control component is disposed on the handwriting panel, and the control component includes a driver chip that is electrically connected to the first electrode lead and the second electrode lead respectively; the driver chip is capable of simultaneously transmitting signals to the first electrode lead and the second electrode lead to determine the open circuit area.

[0020] A control method for a handwriting device, used in any of the above embodiments of the handwriting device, the control method comprising:

[0021] When the handwriting panel is in wiping mode, the magnetic eraser is placed on the area to be wiped on the second substrate to draw out the magnetic conductive particles in the cavity corresponding to the area to be wiped.

[0022] The control component locates the open circuit on the network line and applies a pixel voltage to the pixel electrode in the pixel electrode layer corresponding to the open circuit, so as to form a voltage difference between the pixel electrode corresponding to the open circuit and the common electrode layer.

[0023] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows:

[0024] Compared to traditional handwriting panels, the handwriting panel of this application does not require a corresponding infrared device to position the eraser. It can be used with a magnetic eraser to achieve the functions of positioning and erasing the eraser. Furthermore, the shape and area of ​​the eraser can be arbitrarily changed to achieve different erasing unit shapes and areas. Attached Figure Description

[0025] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings illustrate various embodiments generally by way of example rather than limitation, and are used, together with the description and claims, to explain the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0026] Figure 1 A cross-sectional view of a liquid crystal handwriting panel provided for related technologies;

[0027] Figure 2 A cross-sectional view of the handwriting panel provided in the embodiments of this application;

[0028] Figure 3 for Figure 2 Top view of area A in the middle;

[0029] Figure 4 A cross-sectional view of the magnetic eraser placed on the handwriting panel in the handwriting device provided in the embodiments of this application;

[0030] Figure 5 for Figure 4 Top view of area B in the middle;

[0031] Figure 6A three-dimensional structural diagram of the magnetic eraser provided in the application embodiment;

[0032] Figure 7 A flowchart of a handwriting device control method provided in an embodiment of this application.

[0033] In the figure: 1-Second substrate; 2-Common electrode layer; 3-Liquid crystal layer; 4-Pixel electrode layer; 5-First substrate; 6-Background layer; 7-Positioning layer; 71-First non-metallic layer; 72-Second non-metallic layer; 73-Electrode layer; 74-First electrode lead; 75-Second electrode lead; 8-Magnetic conductive particle; 9-Isolation cavity; 10-Avoidance cavity; 11-Magnetic film layer; 12-Magnetic eraser; 120-Center hole; 13-Driver chip. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of the embodiments of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0036] Figure 1 The diagram illustrates a liquid crystal handwriting panel, which mainly includes a first substrate 5, a second substrate 1, a liquid crystal layer 3 disposed between the two substrates, and an infrared emitting and receiving device (not shown). The first substrate 5 can be a glass substrate, and the second substrate 1 can be a PET soft film capable of sensing pressure. A background layer 6 is located on the first substrate 5. The background layer 6 can be black. A pixel electrode layer 4 is provided on the first substrate 5, and the pixel electrode layer 4 is filled with pixel electrodes. A common electrode layer 2 opposite to the pixel electrode layer 4 is provided on the second substrate 1. The structure and principle of the infrared emitting and receiving device are prior art and will not be described further.

[0037] The liquid crystal layer 3 contains bistable liquid crystal molecules. The liquid crystal molecules in the liquid crystal layer 3 have two states: P state and FC state. The P state can reflect light of a specific wavelength to make the second substrate 1 display a specific color. The FC state is a scattering state that can reflect the color of the background layer 6 on the first substrate 5 to make the second substrate 1 display black.

[0038] When the liquid crystal handwriting panel is in writing mode, the user can apply pressure to the second substrate 1 with a writing tool (e.g., a writing pen), causing some liquid crystal molecules in the liquid crystal layer 3 to change from the FC state to the P state under the action of external pressure. This allows the liquid crystal molecules that have changed to the P state to reflect light of a certain wavelength (e.g., green), so that green handwriting is displayed on the first substrate 5.

[0039] When the LCD handwriting panel is in wiping mode, as the eraser moves on the second substrate 1, the infrared emitting and receiving devices set on the handwriting panel will constantly locate the position of the eraser. Then, the control system of the LCD handwriting panel applies voltage to the pixel electrode in the pixel electrode layer 4 corresponding to the area to be wiped, so that the liquid crystal molecules corresponding to the area to be wiped are converted from the P state to the FC state, so that the area to be wiped can present a background with the same color as the background layer, thereby realizing the erasure of the writing in the area to be wiped.

[0040] like Figure 2 As shown, Figure 2 This diagram illustrates the structure of a handwriting panel according to an embodiment of this application. The handwriting panel includes a first substrate 5, a second substrate 1, and a liquid crystal layer 3 located between the two substrates. The first substrate 5 may be a glass substrate, the second substrate 1 may be a PET soft film, and the liquid crystal layer 3 contains bistable liquid crystal molecules.

[0041] The handwriting panel of this embodiment also includes a positioning layer 7, which is disposed between the first substrate 5 and the second substrate 1 and located on the side of the liquid crystal layer 3 facing away from the second substrate 1. The positioning layer 7 has a grid line formed by the intersection of multiple first electrode leads 74 and multiple second electrode leads 75, and an isolation cavity 9 located at the intersection of two electrode leads. See Figure 4 and Figure 5 The projection of the second substrate 1 onto the first substrate 5 covers the projection of the grid lines onto the first substrate 5.

[0042] The isolation cavity 9 disconnects the two corresponding electrode leads respectively, and the isolation cavity 9 is equipped with magnetic conductive particles 8 that enable the circuits of the two electrode leads to conduct independently. This can be understood as follows: the first electrode lead 74 and the second electrode lead 75 in the grid circuit are disconnected at their intersection through the isolation cavity 9, but the magnetic conductive particles 8 within the isolation cavity 9 enable the circuits of the first electrode lead 74 and the second electrode lead 75 to conduct independently, meaning the signal can still be transmitted along either the first electrode lead 74 or the second electrode lead 75.

[0043] like Figure 4 and Figure 5 As shown, in this embodiment, the magnetic conductive particle 8 is attracted by the magnetic force on the eraser and can detach from the isolation cavity 9, thereby disconnecting the circuits of the first electrode lead 74 and the second electrode lead 75. Furthermore, after the attraction on the eraser is removed, the magnetic conductive particle 8 can return to the isolation cavity 9 to reconnect the circuits of the two electrode leads.

[0044] When the handwriting panel is in erasing mode, a magnetic eraser or other object is placed on the area to be erased. The magnetic force of the eraser attracts the magnetic conductive particles 8 from the isolation cavity 9 corresponding to the area to be erased. At this time, the circuits passing through the first electrode lead 74 and the second electrode lead 75 of the isolation cavity 9 are disconnected. The open circuit area on the grid line can be scanned by an external circuit, thereby applying a pixel voltage to the pixel electrode corresponding to the open circuit area on the first substrate 5, thus erasing the handwriting in the area to be erased. The open circuit area can be understood as the intersection of the two electrode leads, that is, the area where the isolation cavity 9 is located.

[0045] Compared to traditional handwriting panels, the handwriting panel provided in this embodiment does not require a corresponding infrared device to locate the eraser position. This handwriting panel can be used with a magnetic eraser to realize the positioning and erasing functions of the eraser. Moreover, the shape and area of ​​the eraser can be arbitrarily changed to realize different erasing unit shapes and areas.

[0046] like Figure 3 As shown, in this embodiment, the plurality of first electrode leads 74 can extend laterally, and the plurality of second electrode leads 75 can extend vertically. The isolation cavity 9 at the intersection of the first electrode leads 74 and the second electrode leads 75 is cross-shaped. Preferably, the magnetic conductive particles 8 disposed in the isolation cavity 9 can be selected from Fe, Co, Ni or a corresponding alloy.

[0047] like Figure 2As shown, in some embodiments, the handwriting panel further includes a magnetic absorbing film layer 11. The magnetic absorbing film layer 11 is located on the side of the positioning layer 7 opposite to the second substrate 1. The projection of the magnetic absorbing film layer 11 on the first substrate 5 covers the projection of the grid lines on the first substrate 5. The magnetic absorbing film layer 11 is used to attract magnetic conductive particles 8 so that the magnetic conductive particles 8 are kept in the isolation cavity 9.

[0048] When the handwriting panel is in wiping mode, after the suction force on the eraser is removed, the magnetic conductive particles 8 can be ensured to return to the isolation cavity 9 under the adsorption of the magnetic film layer 11.

[0049] In some embodiments, the positioning layer 7 and the magnetic film layer 11 may be respectively disposed on the first substrate 5. After the first substrate 5 is processed, the positioning layer 7 and the magnetic film layer 11 may be respectively disposed on the first substrate 5.

[0050] Preferably, in this embodiment, the positioning layer 7 and the magnetic film layer 11 are located on opposite sides of the first substrate 5. Specifically, the positioning layer 7 is located on the side of the first substrate 5 facing the second substrate 1, and the magnetic film layer 11 is located on the side of the first substrate 5 away from the second substrate 1. The magnetic film layer 11 can attract the magnetic conductive particles 8 on the positioning layer 7 into the isolation cavity 9 through the first substrate 5.

[0051] Alternatively, the positioning layer 7 can be disposed on the second substrate 1, and the magnetic film layer 11 can be disposed on the side of the second substrate 1 facing the first substrate 5.

[0052] Alternatively, the positioning layer 7 can be disposed on the second substrate 1, facing the first substrate 5. Correspondingly, the magnetic absorbing film layer 11 is disposed on the surface of the positioning layer 7 facing away from the second substrate 1. This embodiment is only described with the example of the positioning layer 7 and the magnetic absorbing film layer 11 being disposed on the first substrate 5 respectively.

[0053] Preferably, the magnetic film layer 11 in this embodiment can be a thin film of metallic or non-metallic magnetic film materials such as spinel and garnet ferrite film or FeCrCo film.

[0054] like Figure 2 As shown, in some embodiments, the handwriting panel further includes a background layer 6 disposed on the first substrate 5. The background layer 6 can be black or blue, etc., and the background layer 6 can be located on the side of the first substrate 5 opposite to the second substrate 1. When the liquid crystal molecules in the liquid crystal layer 3 change from the P state to the FC state, the handwriting panel displays a background color that matches the background layer 6.

[0055] like Figure 2 As shown, in some embodiments, the positioning layer 7 includes a first non-metallic layer 71, an electrode layer 73, and a second non-metallic layer 72 stacked together.

[0056] The electrode layer 73 is disposed between the first non-metallic layer 71 and the second non-metallic layer 72. The first non-metallic layer 71 is disposed on the first substrate 5, and the electrode layer 73 is separated from the second substrate 1 by the second non-metallic layer 72. The electrode layer 73 is formed by the grid lines in the positioning layer 7.

[0057] Furthermore, in this embodiment, the second non-metallic layer 72 has a clearance cavity 10 on its surface facing the electrode layer 73, which is opposite to the isolation cavity 9. The opening of the clearance cavity 10 is opposite to the opening of the isolation cavity 9 to form a sealed cavity. When the magnetic conductive particles 8 in the isolation cavity 9 are attracted, they can detach from the isolation cavity 9 and enter the clearance cavity 10. When the attraction is removed, the magnetic conductive particles 8 can return from the clearance cavity 10 to the isolation cavity 9, thus preventing the magnetically attracted conductive particles from moving to other places.

[0058] Preferably, the size of the clearance cavity 10 is the same as the size of the isolation cavity 9.

[0059] In some embodiments, the isolation cavity 9 is further provided with a carrier liquid, and the magnetic conductive particles 8 are located in the carrier liquid. The carrier liquid facilitates the movement of the magnetic conductive particles 8. When the magnetic conductive particles 8 are attracted, the magnetic conductive particles and the carrier liquid can enter the clearance cavity 10 together. Preferably, the carrier liquid in this embodiment is silicone oil or polyester.

[0060] This application also provides a handwriting device, which includes a handwriting panel, a magnetic eraser 12, and a control component as described in any of the above embodiments.

[0061] like Figure 4 and Figure 5 As shown, the magnetic eraser 12 in this embodiment is used to abut against the second substrate 1 and cover the area to be wiped on the handwriting panel. The magnetic eraser 12 can be understood as having a corresponding magnetic suction element or magnetic suction layer on the existing eraser. When the magnetic eraser 12 abuts against the second substrate 1, the attraction between the magnetic eraser 12 and the magnetic conductive particles 8 is greater than the attraction between the magnetic suction film layer 11 and the magnetic conductive particles 8, thereby ensuring that the magnetic conductive particles 8 are sucked out of the isolation cavity 9.

[0062] In this embodiment, the control component is configured to locate the open circuit area on the grid line and apply a voltage to the pixel electrode corresponding to the open circuit area on the first substrate 5 so that there is a voltage difference between the pixel electrode and the common electrode layer 2, thereby realizing the local erasure operation of the writing panel.

[0063] The control component of this embodiment can be set on the handwriting panel. The control component can include a driving chip 13 on one side of the positioning layer 7. The two ends of the first electrode lead 74 and the second electrode lead 75 can each correspond to a driving chip 13. The driving chips 13 at both ends are electrically connected to the corresponding electrode leads to input signals to the electrode leads in order to determine the open circuit area on the grid line.

[0064] The specific location of the driver chip 13 is not limited in this embodiment, and it can be located on the same layer as the positioning layer 7. For example, if the positioning layer 7 is located on the first substrate 5, then the driver chip 13 can also be located on the first substrate 5; if the positioning layer 7 is located on the second substrate 1, then the driver chip 13 can be located on the second substrate 1.

[0065] In addition, the control component in this embodiment also includes a power supply circuit for electrically connecting to the pixel electrode layer 4 and the common electrode layer 2 respectively. The power supply circuit can be integrated into the driver chip 13, that is, the driver chip 13 can be used to input signals to the electrode leads and apply pixel voltage to the pixel electrodes in the pixel electrode layer 4 respectively.

[0066] Alternatively, the power supply circuits for the pixel electrode layer 4 and the common electrode layer 2 can be separately disposed on one of the substrates.

[0067] like Figure 6 As shown, the shape of the magnetic eraser 12 in this embodiment can be a cylinder or a cube, etc., and its shape is not specifically limited in this application.

[0068] The magnetic eraser 12 in this embodiment can be made of a magnetic material, or, as in... Figure 6 As shown, a magnetic suction layer is provided on the side of the magnetic eraser 12 that is in contact with the second substrate 1, through which magnetic conductive particles 8 can be attracted. This application does not make specific limitations, as long as it is ensured that the magnetic eraser 12 is placed on the second substrate 1 and the attractive force between it and the magnetic conductive particles 8 is greater than the attraction force between the magnetic suction film layer 11 and the magnetic conductive particles 8.

[0069] In addition, the magnetic eraser 12 in this embodiment has a central hole 120, which can achieve the effect of erasing one circle without erasing the middle.

[0070] This application also provides a control method for a handwriting device, which is used in any of the handwriting devices described in the above embodiments, such as... Figure 7 As shown, the control method includes:

[0071] Step 1: When the handwriting panel is in wiping mode, place the magnetic eraser 12 on the area to be wiped on the second substrate 1 and wipe it to remove the magnetic conductive particles 8 in the cavity corresponding to the area to be wiped.

[0072] Step 2: The control component locates the open circuit area on the network line, and applies a pixel voltage to the pixel electrode corresponding to the open circuit area on the first substrate 5, so that a voltage difference is formed between the pixel electrode corresponding to the open circuit area and the common electrode on the second substrate 1, thereby realizing the local function of the handwriting panel.

[0073] In step two, there are several methods for the control component to locate open circuits on the grid lines. For example, the control component may include driver chips 13 located at both ends of the first electrode lead 74 and the second electrode lead 75. The driver chip 13 at one end of the first electrode lead 74 and the driver chip 13 at one end of the second electrode lead 75 respectively input square wave pulse signals into the electrode leads. The open circuit on the grid lines is determined by whether the driver chip 13 at the other end receives the square wave pulse signal. For example, assuming that the driver chip 13 connected to the first electrode lead 74 does not receive the pulse signal from the first electrode lead 74 in the first row, and the driver chip 13 connected to the second electrode lead 75 does not receive the pulse signal from the second electrode lead 75 in the first column, then it can be determined that the intersection of the first electrode lead 74 in the first row and the second electrode lead 75 in the first column is the open circuit. At this time, the control component can apply a pixel voltage to the pixel electrode corresponding to the open circuit.

[0074] It should also be noted that, as long as the positioning speed of the control component is guaranteed, the magnetic eraser 12 in this embodiment can move back and forth when placed on the second substrate 1 to speed up the wiping process.

[0075] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A handwriting panel, comprising a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer disposed between the two substrates, wherein a pixel electrode layer is disposed on the first substrate, and a common electrode layer is disposed on the second substrate, characterized in that, The handwriting panel also includes a positioning layer disposed between two substrates. The positioning layer is located on the side of the liquid crystal layer opposite to the second substrate. The positioning layer is provided with a grid line formed by the intersection of the first electrode lead and the second electrode lead, and an isolation cavity located at the intersection of the two electrode leads. The isolation cavity cuts off the two electrode leads respectively, and the isolation cavity is provided with magnetic conductive particles that make the circuits of the two electrode leads conduct respectively. After being attracted by the magnetic force of the eraser, the magnetic conductive particles can detach from the isolation cavity to disconnect the circuits of the two electrode leads respectively. After the attraction force is removed, the magnetic conductive particles can move into the isolation cavity.

2. The handwriting panel as described in claim 1, characterized in that, The handwriting panel also includes a magnetic film layer, which is located on the side of the positioning layer opposite to the second substrate. The magnetic film layer is used to attract the magnetic conductive particles so that the magnetic conductive particles are placed in the isolation cavity.

3. The handwriting panel as described in claim 2, characterized in that, The magnetic film layer and the positioning layer are respectively disposed on the first substrate. The positioning layer is located on the side of the first substrate facing the second substrate, and the magnetic film layer is located on the side of the first substrate away from the second substrate.

4. The handwriting panel as described in claim 2, characterized in that, The handwriting panel also includes a background layer, which is disposed on the magnetic film layer and located on the side of the magnetic film layer opposite to the first substrate.

5. The handwriting panel as described in claim 2, characterized in that, The positioning layer includes a first non-metallic layer, an electrode layer, and a second non-metallic layer stacked together. The electrode layer is disposed between the two non-metallic layers. The first non-metallic layer is disposed on the first substrate. The electrode layer is separated from the second substrate by the second non-metallic layer. The grid lines form the electrode layer. The second non-metallic layer has a clearance cavity opposite to the isolation cavity. The magnetic conductive particles can enter the clearance cavity after leaving the isolation cavity.

6. The handwriting panel as described in claim 5, characterized in that, The isolation chamber is also equipped with a carrier liquid, and the magnetic conductive particles are located in the carrier liquid.

7. The handwriting panel as described in claim 6, characterized in that, The magnetic conductive particles are any one of iron, copper, and nickel; And / or, the carrier fluid is silicone oil or polyester; And / or, the magnetic film layer is a garnet-type ferrite film.

8. A handwriting device, characterized in that, include: The handwriting panel according to any one of claims 1-7 above; A magnetic eraser is used to wipe the area to be wiped on the handwriting panel against the second substrate. The magnetic eraser can generate an attractive force on the magnetic conductive particles so that they can be moved out of the isolation cavity. The control component is electrically connected to the two electrode leads, the pixel electrode layer, and the common electrode layer, respectively. The control component is used to locate the open circuit area of ​​the two electrode leads and apply a pixel voltage to the pixel electrode in the pixel electrode layer corresponding to the open circuit area.

9. The handwriting device as described in claim 8, characterized in that, The control component is disposed on the handwriting panel, and the control component includes a driver chip that is electrically connected to the first electrode lead and the second electrode lead respectively; the driver chip can simultaneously transmit signals to the first electrode lead and the second electrode lead to determine the open circuit area.

10. A control method for a handwriting device, characterized in that, For the handwriting device according to claim 8 or 9 above, the control method includes: When the handwriting panel is in wiping mode, the magnetic eraser is placed on the area to be wiped on the second substrate to draw out the magnetic conductive particles in the cavity corresponding to the area to be wiped. The control component locates the open circuit on the network line and applies a pixel voltage to the pixel electrode in the pixel electrode layer corresponding to the open circuit, so as to form a voltage difference between the pixel electrode corresponding to the open circuit and the common electrode layer.

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