Handwriting display panel

Abstract

The invention discloses a handwriting display panel which comprises a first electrode carrier plate, a display particle layer and a second electrode carrier plate located on the side, away from the first electrode carrier plate, of the display particle layer, the first electrode carrier plate comprises a common electrode, and the display particle layer comprises a plurality of display particles. When the part of the second electrode support plate is subjected to the action force transmitted by the display particle layer, the distance between the part of the second electrode support plate and the display particle layer is changed so as to erase the corresponding local picture in the handwriting display panel, the content which is not erased currently cannot be influenced, and the erasing reliability of the local picture is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a handwriting display panel. Background Art

[0002] As an electronic device for writing and drawing, a handwriting display panel must have a clearing function after handwriting.

[0003] Among them, most of the current write display panels can only clear all contents with one click, and cannot perform partial erasure and modification of contents. Or after turning on the partial erasure function, the brightness of the current content is reduced and the erasure marks are obvious, which greatly limits the development of write display panels. Summary of the Invention

[0004] Embodiments of the present invention provide a handwriting display panel to solve the problem that the local erasing function of existing handwriting display panels is not perfect.

[0005] An embodiment of the present invention provides a handwriting display panel, comprising:

[0006] A first electrode carrier including a common electrode;

[0007] A display particle layer including a plurality of display particles; and

[0008] The second electrode carrier is located on a side of the plurality of display particles away from the first electrode carrier, and is used to change the distance between the corresponding part of the second electrode carrier and the display particle layer when a part of the second electrode carrier is subjected to a force transmitted through the display particle layer, so as to erase the corresponding local image in the handwriting display panel.

[0009] In some embodiments, the second electrode carrier includes a plurality of first electrodes and a plurality of second electrodes, and the first electrodes and the second electrodes are insulated from each other;

[0010] At least one second electrode is provided between at least two adjacent first electrodes, and / or at least one first electrode is provided between at least two adjacent second electrodes;

[0011] When the second electrode carrier is subjected to a force transmitted through the display particle layer, the plurality of first electrodes in the force-bearing portion of the second electrode carrier are used to change the motion state of the corresponding plurality of display particles in the display particle layer, so as to erase the corresponding partial image in the handwriting display panel;

[0012] In which, when the second electrode carrier is not affected by the force transmitted through the display particle layer, multiple second electrodes are used to change the motion state of multiple display particles in the display particle layer to erase the global display screen of the handwriting display panel, or multiple second electrodes are used to maintain the motion state of multiple display particles in the display particle layer to maintain the global display screen of the handwriting display panel.

[0013] In some embodiments, when the second electrode carrier is subjected to a force transmitted through the display particle layer, the distance between the first electrode in the force-bearing portion of the second electrode carrier and the display particle layer is smaller than the distance between the second electrode and the display particle layer, and the first electrode in the force-bearing portion is used to receive a first voltage to change the motion state of the corresponding multiple display particles in the display particle layer so as to erase the corresponding local image in the handwriting display panel.

[0014] In some embodiments, when the second electrode carrier is not affected by the force transmitted through the display particle layer, the distance between the second electrode and the display particle layer is smaller than the distance between the first electrode and the display particle layer, and multiple second electrodes are used to receive a second voltage to change the motion state of multiple display particles in the display particle layer to erase the global display screen of the handwriting display panel, or multiple second electrodes are floated to maintain the global display screen of the handwriting display panel, or multiple second electrodes receive a third voltage to maintain the global display screen of the handwriting display panel.

[0015] In some embodiments, the elastic modulus of the second electrode is smaller than the elastic modulus of the first electrode.

[0016] In some embodiments, the second electrode comprises:

[0017] a supporting portion, wherein the elastic modulus of the supporting portion is smaller than the elastic modulus of the first electrode;

[0018] The electrode portion is located on a side of the support portion close to the display particle layer, and the conductivity of the electrode portion is greater than the conductivity of the support portion.

[0019] In some embodiments, a side of the support portion away from the display particle layer and a side of the first electrode away from the display particle layer are located on the same horizontal plane;

[0020] When the second electrode carrier is not subjected to a force transmitted through the display particle layer, the thickness of the supporting portion is greater than or equal to the thickness of the first electrode.

[0021] In some embodiments, the second electrode carrier further comprises:

[0022] a connecting portion, located on a side of the first electrode away from the display particle layer and a side of the supporting portion away from the display particle layer, and connected between the first electrode and the supporting portion;

[0023] Wherein, the connecting portion and the plurality of first electrodes are integrally formed.

[0024] In some embodiments, the support portion is made of insulating material.

[0025] In some embodiments, the plurality of display particles include liquid crystal particles or electronic ink particles.

[0026] The handwriting display panel provided by an embodiment of the present invention includes a first electrode carrier (including a common electrode), a display particle layer (including multiple display particles), and a second electrode carrier located on a side of the display particle layer away from the first electrode carrier. The multiple display particles in the display particle layer are used to move so that the handwriting display panel displays a picture. The second electrode carrier is configured to change the distance between the force-bearing part of the second electrode carrier and the display particle layer when a part of the second electrode carrier is acted upon by a force transmitted through the display particle layer, so as to change the motion state of the corresponding multiple display particles in the display particle layer, so as to erase the corresponding local picture in the handwriting display panel without affecting the currently unerased content, thereby improving the reliability of erasing the local picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0028] Figure 1 This is a cross-sectional view of a handwriting display panel provided by an embodiment of the present invention.

[0029] Figure 2 、 3 Cross-sectional views of a handwriting display panel provided by an embodiment of the present invention in two states: unstressed and partially stressed for partial erasure.

[0030] Figure 4 This is a flow chart of a method for manufacturing a handwriting display panel provided by an embodiment of the present invention.

[0031] Figures 5 to 11 A schematic diagram of a scenario of a method for manufacturing a handwriting display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will clearly and continuously describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "away from", "close to", "up", "vertical", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the figures, units with similar structures are represented by the same reference numerals. Mention of "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present invention. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Embodiments of the present invention provide a method for separating nanoparticles, which includes but is not limited to the following embodiments.

[0035] Embodiments of the present invention provide a handwriting display panel, which may include but is not limited to the following embodiments and combinations of the following embodiments.

[0036] In some embodiments, as Figure 1 and Figure 2As shown, the handwriting display panel 100 includes: a display component 10, including a display particle layer formed by a plurality of display particles 101, a first electrode carrier located on one side of the display particle layer, the first electrode carrier including a common electrode 102, and the plurality of display particles 101 are used to move so that the handwriting display panel 100 displays a picture; and a second electrode carrier 20, which is arranged opposite to the display component 10 and is located on a side of the plurality of display particles 101 away from the first electrode carrier, and is configured to change the distance between the corresponding force-bearing part of the second electrode carrier 20 and the display component 10 when a part of the second electrode carrier 20 is acted upon by a force transmitted through the display component 10, so as to change the movement state of the corresponding plurality of display particles 101 in the display component 10, so as to erase the corresponding local picture in the handwriting display panel 100.

[0037] The present embodiment does not limit the type of the handwriting display panel 100 , and the plurality of display particles 101 include liquid crystal particles or electronic ink particles.

[0038] When the multiple display particles 101 include liquid crystal particles, the handwriting display panel 100 is a liquid crystal handwriting display panel. Before handwriting, the multiple liquid crystal particles can be considered to be arranged in a disordered state, in a scattered state, causing the incident light to be scattered (the light diffuses in all directions), and the handwriting display panel 100 appears transparent. During the handwriting process, the force is transmitted to the multiple liquid crystal particles in the corresponding portion of the display component 10. After being acted upon by the force, the multiple liquid crystal particles in the portion change their arrangement state, becoming reflective, and are used to reflect light to form the corresponding image. Furthermore, the liquid crystal particles can be, but are not limited to, bistable cholesteric liquid crystals. The thickness of the liquid crystal layer formed by the multiple liquid crystal particles can be less than 10μm.

[0039] When the multiple display particles 101 include electronic ink particles, the handwriting display panel 100 is an electronic ink handwriting display panel, and each electronic ink particle can include multiple nanoparticles of different colors (white nanoparticles and black nanoparticles are taken as an example here). Before handwriting, it can be assumed that the white nanoparticles of the multiple electronic ink particles are gathered close to the light-emitting surface after the last reset, so that the handwriting display panel 100 appears white; during the handwriting process, the force is transmitted to the corresponding part of the display component 10 to form an electric field at both ends of the multiple electronic ink particles in the part, so that the black nanoparticles among the multiple electronic ink particles in the part are gathered close to the light-emitting surface to form the corresponding picture.

[0040] Specifically, in this embodiment, whether for a liquid crystal handwriting display panel or an electronic ink handwriting display panel, a second electrode carrier 20 is provided opposite to the display component 10, and the second electrode carrier 20 is configured so that when a portion of the second electrode carrier 20 is acted upon by a force transmitted through the display component 10, that is, when the force is transmitted through the display component 10 to the corresponding portion of the second electrode carrier 20, the distance between the portion of the second electrode carrier 20 and the display component 10 can change, thereby changing the motion state of the plurality of display particles 101 in the corresponding region of the display component 10. For example, in a liquid crystal handwriting display panel, the plurality of liquid crystal particles in the region can be affected by the change in distance from being affected by no electric field force to being affected by an electric field force, thereby changing from a previous reflective state to a scattering state, thereby erasing a portion of the image. For another example, in an electronic ink handwriting display panel, the plurality of ink particles in the region can be affected by the change in the direction of the electric field force caused by the change in distance, thereby changing from previously black nanoparticles gathering near the light emitting surface to previously white nanoparticles gathering near the light emitting surface, thereby erasing a portion of the image.

[0041] As can be understood, in this embodiment, when a portion of the second electrode carrier 20 is subjected to a force transmitted through the display assembly 10, only the distance between that portion of the second electrode carrier 20 and the display assembly 10 changes, thereby changing only the motion state of the corresponding plurality of display particles 101 in the display assembly 10, thereby erasing only the corresponding portion of the image on the handwriting display panel 100. Simultaneously, the distance between the portion of the second electrode carrier 20 not subjected to the force and the display assembly 10 remains unchanged, so the plurality of display particles 101 maintain their previous motion state, thereby preserving the corresponding portion of the image. Therefore, in this embodiment, erasing a portion of the image on the handwriting display panel 100 does not affect the currently unerased content, thereby improving the reliability of erasing the partial image.

[0042] In some embodiments, as Figure 2As shown, the second electrode carrier 20 includes a plurality of first electrodes 201 and a plurality of second electrodes 202 that are insulated, at least one second electrode 202 is provided between at least two adjacent first electrodes 201, and / or at least one first electrode 201 is provided between at least two adjacent second electrodes 202; wherein, the plurality of first electrodes 201 in the force-bearing portion of the second electrode carrier 20 that is acted upon by the force transmitted through the display component 10 are used to change the motion state of the corresponding plurality of display particles 101 in the display component 10 to erase the corresponding local image in the handwriting display panel 100; wherein, when the second electrode carrier 20 is not acted upon by the force transmitted through the display component 10, the plurality of second electrodes 202 are used to change the motion state of the plurality of display particles 101 in the display component 10 to erase the global display image of the handwriting display panel 100, or the plurality of second electrodes 202 are used to maintain the motion state of the plurality of display particles 101 in the display component 10 to maintain the global display image of the handwriting display panel 100.

[0043] Among them, the first electrode 201 and the second electrode 202 in the second electrode carrier 20 can be arranged alternately, or a plurality of second electrodes 202 can be set between two adjacent first electrodes 201, and / or a plurality of first electrodes 201 can be set between two adjacent second electrodes 202. By changing the distance between the two electrodes and the display component 10, an electric field force can be generated compared with the previous handwriting state, or the direction of the electric field force can be changed, thereby changing the motion state of the display particles 101 corresponding to the part.

[0044] Specifically, when the second electrode carrier 20 is not affected by the force transmitted through the display component 10, the multiple second electrodes 202 play the following role: changing the motion state of the corresponding multiple display particles 101 to erase the global display image of the handwriting display panel 100, or maintaining the motion state of the multiple display particles 101 to maintain the global display image of the handwriting display panel 100; once the second electrode carrier 20 is affected by the force transmitted through the display component 10, the multiple first electrodes 201 in the affected part are used to change the motion state of the corresponding multiple display particles 101 to erase the local image of the corresponding part in the handwriting display panel 100.

[0045] In some embodiments, as Figure 3As shown, the distance between the first electrode 201 in the force-bearing portion of the second electrode carrier 20 and the display component 10 is smaller than the distance between the second electrode 202 and the display component 10, and the first electrode 201 in the force-bearing portion is used to receive a first voltage V0 to change the motion state of the corresponding multiple display particles 101 in the display component 10, so as to erase the corresponding local screen in the handwriting display panel 100.

[0046] in, Figure 2 It can be understood that the second electrode carrier 20 is in a state when it is not affected by the force transmitted through the display component 10. Figure 3 It can be understood that the first portion p1 of the second electrode carrier 20 is the portion affected by the force transmitted through the display component 10 , and the second portion p2 of the second electrode carrier 20 is the portion not affected by the force transmitted through the display component 10 .

[0047] Specifically, such as Figure 3 As shown, for the first part p1 of the second electrode carrier 20 that is affected by the force transmitted through the display component 10, the first distance d1 between the first electrode 201 and the display component 10 is smaller than the second distance d2 between the second electrode 202 and the display component 10. That is, when subjected to force, the first electrode 201 is closer to the display component 10 than the second electrode 202. At this time, since the first electrode 201 is loaded with the first voltage V0, the electric field force generated by the first electrode 201 is sufficient to act on the multiple display particles 101 in the corresponding area of the display component 10. Compared with the previous handwriting process, the electric field force is generated or the direction of the electric field force changes, thereby changing the motion state of the multiple display particles 101 (the liquid crystal particles become scattered or the white nanoparticles gather near the light-emitting surface), so as to achieve partial erasure of the display image.

[0048] At the same time, the second electrode 202 in the first portion p1 is farther away from the display component 10 than the first electrode 201, so that the electric field force generated by the second electrode 202 is insufficient to act on the multiple display particles 101 in the corresponding area of the display component 10. Therefore, no matter whether the second electrode 202 in the first portion p1 is floating (not receiving any voltage), receiving the third voltage, or still receiving the first voltage V0, it will not affect the movement state of the multiple display particles 101 corresponding to the first portion p1.

[0049] In some embodiments, as Figure 2As shown, when the second electrode carrier 20 is not affected by the force transmitted through the display component 10, the distance between the second electrode 202 and the display component 10 is smaller than the distance between the first electrode 201 and the display component 10, and the plurality of second electrodes 202 are used to receive a second voltage Vc1 to change the motion state of the plurality of display particles 101 of the display component 10 to erase the global display screen of the handwriting display panel 100, or the plurality of second electrodes 202 float or receive a third voltage Vc2 to maintain the global display screen of the handwriting display panel 100.

[0050] Specifically, such as Figure 2 As shown, when the second electrode carrier 20 is not affected by the force transmitted through the display component 10, the distance between the second electrode 202 and the display component 10 is smaller than the distance between the first electrode 201 and the display component 10, that is, when no force is applied, the second electrode 202 is closer to the display component 10 than the first electrode 201.

[0051] At this time, if the second electrode 202 is loaded with the second voltage Vc1, the electric field force generated by the second electrode 202 is sufficient to act on the multiple display particles 101 of the display component 10, and compared with the previous handwriting process, the electric field force is generated or the direction of the electric field force is changed, thereby changing the motion state of all the display particles 101 (the liquid crystal particles become a scattered state or become white nanoparticles and gather near the light-emitting surface) to achieve global erasure of the display screen.

[0052] At this time, if the second electrode 202 is floating or loaded with the third voltage Vc2, it can be considered that the second electrode 202 no longer generates an electric field force and thus does not change the motion state of all display particles 101 (the liquid crystal particles become a scattered state or become white nanoparticles and gather close to the light-emitting surface), or the electric field force generated by the second electrode 202 is insufficient to act on the multiple display particles 101 of the display component 10, that is, compared with the previous handwriting process, it is considered that the motion state of all display particles 101 is not changed, so as to achieve global maintenance of the display image.

[0053] At the same time, the first electrode 201 is farther away from the display component 10 than the second electrode 202, so that the electric field force generated by the first electrode 201 is insufficient to act on the multiple display particles 101 in the corresponding area of the display component 10. Therefore, no matter whether the multiple first electrodes 201 are floating (not receiving any voltage), receiving the third voltage Vc2, the second voltage Vc1 or other voltages, it will not affect the movement state of all the display particles 101.

[0054] In some embodiments, combined Figure 2 and Figure 3As shown in FIG, the elastic modulus of the second electrode 202 is smaller than the elastic modulus of the first electrode 201. Figure 3 As shown, when subjected to the force transmitted through the display component 10 (that is, the direction of the force is from top to bottom), the second electrode 202 can produce a greater deformation than the first electrode 201, so that the second electrode 202 can be compressed a greater distance from top to bottom, thereby achieving a second distance d2 between the second electrode 202 and the display module greater than the first distance d1 between the first electrode 201 and the display module, and then by changing the motion state of the multiple display particles 101 corresponding to the force-bearing part (that is, the first part p1) of the first electrode 201 loaded with the first voltage V0, partial erasure of the display screen is achieved. As shown in FIG. Figure 2 As shown, when the second electrode carrier 20 is not affected by the force transmitted through the display component 10, it can be considered that the shapes of the second electrode 202 and the first electrode 201 in the vertical direction have not changed. At this time, the distance between the second electrode 202 and the display module is closer, and the global erasure or global maintenance of the display screen can be achieved by controlling whether the second electrode 202 is floating or loaded with the corresponding voltage.

[0055] In some embodiments, combined Figure 2 and Figure 3 As shown, the second electrode 202 includes: a supporting portion 2021, the elastic modulus of the supporting portion 2021 is smaller than the elastic modulus of the first electrode 201; an electrode portion 2022, located on a side of the supporting portion 2021 close to the display component 10, and the conductivity of the electrode portion 2022 is greater than the conductivity of the supporting portion 2021.

[0056] As discussed above, the second electrode 202 and the first electrode 201 need to be loaded with corresponding voltages in different situations to achieve at least global erasing and local erasing of the display screen, respectively. Therefore, both electrodes must have at least high electrical conductivity. However, as analyzed above, the second electrode 202 has a relatively low elastic modulus and must have a relatively high elasticity to achieve a significant reduction in its vertical dimension when subjected to force compared to when unforced.

[0057] Specifically, in this embodiment, the second electrode 202 includes a support portion 2021 with a low elastic modulus, located away from the display component 10, and an electrode portion 2022 with a high conductivity, located closer to the display component 10. This ensures that the second electrode 202 can deform significantly when subjected to force and generate a sufficiently large electric field when a voltage is applied. The electrode portion 2022 of the first and second electrodes 201 and 202 can be made of a common conductive film layer such as copper, aluminum, or tin-doped indium oxide. This means that the first electrode 201 and the electrode portion 2022 can be either light-shielding or light-transmissive.

[0058] Among them, such as Figure 2 As shown, the side of the support portion 2021 away from the display component 10 and the side of the first electrode 201 away from the display component 10 are located on the same horizontal plane; when no force is applied (the second electrode carrier 20 is not subjected to a force transmitted through the display particle layer), the thickness of the support portion 2021 is greater than or equal to the thickness of the first electrode 201. For example, the upper surface of the support portion 2021 can be 1 μm to 10 μm higher than the upper surface of the first electrode 201.

[0059] It can be understood that since the electrode portion 2022 is also provided on the side of the support portion 2021 close to the display component 10, and the bottom of the support portion 2021 and the bottom of the first electrode 201 are located in the same horizontal plane, when no force is applied, the thickness of the support portion 2021 is greater than or equal to the thickness of the first electrode 201, so that the distance between the electrode portion 2022 and the display component 10 (that is, the distance between the second electrode 202 and the display component 10) can be smaller than the distance between the first electrode 201 and the display component 10, and then by controlling whether the second electrode 202 is floating or loaded with the corresponding voltage, global erasure or global maintenance of the display screen can be achieved.

[0060] In some embodiments, combined Figure 2 and Figure 3 As shown, the second electrode carrier 20 further includes: a connecting portion 203, located on a side of the first electrode 201 away from the display component 10 and a side of the supporting portion 2021 away from the display component 10, and connected between the first electrode 201 and the supporting portion 2021; wherein the connecting portion 203 and the plurality of first electrodes 201 are integrally formed. Furthermore, the supporting portion 2021 is made of an insulating material. Specifically, in this embodiment, the connecting portion 203 and the plurality of first electrodes 201 can be integrally formed on the carrier 30 first, and then a plurality of supporting portions 2021 can be formed in an area above the connecting portion 203 where the first electrodes 201 are not formed, and then a corresponding electrode portion 2022 can be formed above each supporting portion 2021.

[0061] It should be noted that since the connecting portion 203 and the multiple first electrodes 201 are integrally formed, the material of the connecting portion 203 can be the same as the material of the first electrode 201, that is, the connecting portion 203 has a large conductivity. In order to avoid the electrode portion 2022 from being short-circuited with the first electrode 201 through the connecting portion 203, an insulating and highly elastic material (including but not limited to at least one of silicone and resin) can be used to make the support portion 2021 located between the electrode portion 2022 and the connecting portion 203.

[0062] Specifically, such as Figure 2As shown, the first electrode carrier is located on a side of the display particles 101 away from the second electrode carrier 20. A common voltage Vm is applied to the common electrode 102 in the first electrode carrier. The voltage difference and distance between the common electrode 102 and one of the first electrodes 201 and the second electrodes 202 are used to control the motion of the display particles 101. The material of the common electrode 102 may include, but is not limited to, at least one of indium tin oxide, aluminum-doped zinc oxide, and fluorine-doped tin oxide, so that the common electrode 102 has a high light transmittance, thereby enabling the display of images.

[0063] The common voltage Vm may be, but is not limited to, 0V. Figure 2 and Figure 3 The “+” or “-” indicated in the figure indicates the relative relationship between the voltage polarities loaded on the two wires. For example, any positive voltage is represented by “+” relative to any 0 or negative voltage, and any negative voltage is represented by “-” relative to any 0 or positive voltage. The larger and smaller amplitudes of two voltages of both positive polarity are represented by “+” and “-” respectively, and the larger and smaller amplitudes of two voltages of both negative polarity are represented by “-” and “+” respectively.

[0064] Specifically, when the distance between the first electrode 201 or the second electrode 202 and the common electrode 102 is sufficiently small, and a corresponding voltage is applied to the first electrode 201 or the second electrode 202, a sufficiently large electric field is formed between the first electrode 201 or the second electrode 202 and the common electrode 102 to affect the motion state of the plurality of display particles 101 therebetween. When the voltage difference is constant, the closer the distance, the more pronounced the change or maintenance of the motion state of the plurality of display particles 101. Similarly, when the distance is constant, the closer the voltage difference is to or the further it is from the threshold voltage of the display particles 101, the more pronounced the change or maintenance of the motion state of the plurality of display particles 101.

[0065] Combined with the above discussion, we can see that for LCD handwriting display panels, there are the following analysis:

[0066] During handwriting, it is not necessary to apply a corresponding voltage to any of the common electrode 102, the first electrode 201, and the second electrode 202. That is, all three electrodes can be left floating. The applied force is transmitted to the liquid crystal particles in the corresponding portion of the display component 10. The liquid crystal particles in the portion are then transformed from a scattering state to a reflective state by the applied force, thereby reflecting light to form a corresponding image.

[0067] When you need to globally erase the display screen, such as Figure 2As shown, the user does not need to apply force to the liquid crystal handwriting display panel. Instead, the user applies a common voltage Vm to the common electrode 102 and a second voltage Vc1 to the second electrode 202. At this time, the distance between the second electrode 202 and the display component 10 is small. The voltage difference "Vc1-Vm" between the second electrode 202 and the common electrode 102 generates a sufficiently large electric field to make all liquid crystal particles change from the original scattering state or reflective state to the scattering state, thereby achieving global erasure of the display screen.

[0068] When global maintenance of the display screen is required, such as Figure 2 As shown, the difference from the above situation is that the second electrode 202 needs to be floated so that no corresponding electric field force is generated, and all liquid crystal particles maintain their previous motion state, or a third voltage Vc2 is applied to the second electrode 202 so that the corresponding electric field force generated by the voltage value "Vc2-Vm" is insufficient to change the previous motion state of the liquid crystal particles. Both of the above methods can achieve global maintenance of the display image;

[0069] When it is necessary to partially erase the display screen, such as Figure 3 As shown, a user applies a force to a corresponding area of the liquid crystal handwriting display panel, applies a common voltage Vm to the common electrode 102, and applies a first voltage V0 (which may be the same as or close to the second voltage Vc1) to the plurality of first electrodes 201. At this time, for example, the distance between the first electrode 201 and the display component 10 in the first portion p1 described above is relatively small. The voltage difference "V0-Vm" between the first electrode 201 and the common electrode 102 generates a sufficiently large electric field that causes the liquid crystal particles corresponding to the first portion p1 to be unified from their original scattering or reflective state to a scattering state, thereby achieving partial erasure of the display image. However, it should be noted that, for example, the distance between the second electrode 202 and the display component 10 in the second portion p2 described above is still relatively small. To prevent the image corresponding to the second portion p2 from being erased, the plurality of second electrodes 202 can be set to a floating state or applied with the third voltage Vc2 described above, so that no corresponding electric field force is generated in the second portion p2, or the generated corresponding electric field force is insufficient to change the previous motion state of the liquid crystal particles, thereby maintaining the image in other portions of the display image.

[0070] For electronic ink handwriting display panels, the following analysis is available:

[0071] During handwriting, Figure 2 As shown, a common voltage Vm is applied to the common electrode 102, and a handwriting voltage V0' is applied to the second electrode 202. The applied force is transmitted to the multiple liquid crystal particles in the corresponding portion of the display component 10. The voltage difference "V0'-Vm" forms an electric field at both ends of the multiple electronic ink particles in the portion, causing the black nanoparticles in the multiple electronic ink particles in the portion to gather near the light emitting surface, thereby forming the corresponding image.

[0072] When you need to globally erase the display screen, such as Figure 2 As shown, refer to the analysis of the liquid crystal handwriting display panel above.

[0073] When global maintenance of the display screen is required, such as Figure 2 As shown, similarly referring to the analysis of the liquid crystal handwriting display panel above, further, the third voltage Vc2 in this embodiment can also be the same as the handwriting voltage V0';

[0074] When it is necessary to partially erase the display screen, such as Figure 3 As shown, similarly referring to the analysis of the liquid crystal handwriting display panel above, further, if the common voltage Vm is used as a reference, the polarities of the first voltage V0 and the handwriting voltage V0' relative to the common voltage Vm in this embodiment are opposite, and the absolute values of the differences with the common voltage Vm can be equal.

[0075] To better illustrate the handwriting display panel 100 and its working principle, embodiments of the present invention further provide a method for manufacturing a handwriting display panel, which may include but is not limited to the following embodiments and combinations of the following embodiments.

[0076] like Figure 4 As shown, the method for manufacturing the handwriting display panel may include but is not limited to the following steps:

[0077] S1, forming an integrally formed connecting portion and a plurality of first electrodes on a carrier;

[0078] Among them, combined Figure 5 and Figure 6 As shown, the material of the carrier 30 can be, but is not limited to, glass, circuit board raw materials, or acrylic to provide a greater supporting force for the carrier 30. A film layer having a certain thickness can be formed using at least one of copper, aluminum, and tin-doped indium oxide, and then a portion of the film layer is etched to form a plurality of raised first electrodes 201, as well as a connecting portion 203 located at the bottom thereof and connecting the plurality of first electrodes 201.

[0079] S2, forming a plurality of support portions above the connection portions between the plurality of first electrodes;

[0080] Among them, combined Figure 7 and Figure 8 As shown, the support portion 2021 can be made by a yellow light process. The material of the support portion 2021 and its position and size relationship with the first electrode 201 can refer to the above description;

[0081] The present embodiment does not limit the specific shape of the support portion 2021. For example, Figure 8As shown, a supporting portion 2021 surrounding each first electrode 201 may be provided on its periphery, that is, a gap is provided between two adjacent supporting portions 2021, and only the connecting portion 203 is provided in the gap. Of course, a first electrode 201 may also be provided between two adjacent supporting portions 2021, or multiple supporting portions 2021 may be integrally formed while having gaps between them and the multiple first electrodes 201.

[0082] S3, forming a display component including a first electrode carrier and a display particle layer, and forming a plurality of electrode portions on one side of the display particle layer;

[0083] Among them, combined Figure 9 and Figure 10 As shown, the size and shape of the multiple electrode parts 2022 need to be consistent with the multiple support parts 2021 so that the orthographic projections of the two on the display component 10 can overlap; wherein, the material and size of the electrode parts 2022 can refer to the description above;

[0084] S4, attaching the display assembly and the plurality of electrode portions to the plurality of support portions;

[0085] Combined with the above discussion, we can see that Figure 11 As shown, the plurality of electrode portions 2022 can be brought into contact with the plurality of support portions 2021 and pressure applied thereto to achieve fixation of the two, while avoiding contact between the electrode portions 2022 and the first electrode 201 .

[0086] The handwriting display panel provided by the embodiments of the present invention has been introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A handwriting display panel, characterized in that: include: A first electrode carrier including a common electrode; A display particle layer, including a plurality of display particles; as well as The second electrode carrier is located on a side of the plurality of display particles away from the first electrode carrier, and is used to change the distance between the corresponding part of the second electrode carrier and the display particle layer when a part of the second electrode carrier is subjected to a force transmitted through the display particle layer, so as to erase the corresponding local image in the handwriting display panel.

2. The handwriting display panel according to claim 1, wherein: The second electrode carrier includes a plurality of first electrodes and a plurality of second electrodes, and the first electrodes and the second electrodes are insulated from each other; At least one second electrode is provided between at least two adjacent first electrodes, and / or at least one first electrode is provided between at least two adjacent second electrodes; When the second electrode carrier is subjected to a force transmitted through the display particle layer, the plurality of first electrodes in the force-bearing portion of the second electrode carrier are used to change the motion state of the corresponding plurality of display particles in the display particle layer, so as to erase the corresponding partial image in the handwriting display panel; In which, when the second electrode carrier is not affected by the force transmitted through the display particle layer, multiple second electrodes are used to change the motion state of multiple display particles in the display particle layer to erase the global display screen of the handwriting display panel, or multiple second electrodes are used to maintain the motion state of multiple display particles in the display particle layer to maintain the global display screen of the handwriting display panel.

3. The handwriting display panel according to claim 2, wherein: When the second electrode carrier is subjected to a force transmitted through the display particle layer, the distance between the first electrode in the force-bearing part of the second electrode carrier and the display particle layer is smaller than the distance between the second electrode and the display particle layer, and the first electrode in the force-bearing part is used to receive a first voltage to change the motion state of the corresponding multiple display particles in the display particle layer so as to erase the corresponding local image in the handwriting display panel.

4. The handwriting display panel according to claim 2, wherein: When the second electrode carrier is not affected by the force transmitted through the display particle layer, the distance between the second electrode and the display particle layer is smaller than the distance between the first electrode and the display particle layer, and multiple second electrodes are used to receive a second voltage to change the motion state of multiple display particles in the display particle layer to erase the global display screen of the handwriting display panel, or multiple second electrodes are floated to maintain the global display screen of the handwriting display panel, or multiple second electrodes receive a third voltage to maintain the global display screen of the handwriting display panel.

5. The handwriting display panel according to any one of claims 2 to 4, wherein: An elastic modulus of the second electrode is smaller than an elastic modulus of the first electrode.

6. The handwriting display panel according to claim 5, wherein: The second electrode comprises: a supporting portion, wherein the elastic modulus of the supporting portion is smaller than the elastic modulus of the first electrode; The electrode portion is located on a side of the support portion close to the display particle layer, and the conductivity of the electrode portion is greater than the conductivity of the support portion.

7. The handwriting display panel according to claim 6, wherein: The side of the support portion away from the display particle layer and the side of the first electrode away from the display particle layer are located on the same horizontal plane; When the second electrode carrier is not subjected to a force transmitted through the display particle layer, the thickness of the supporting portion is greater than or equal to the thickness of the first electrode.

8. The handwriting display panel according to claim 6, wherein: The second electrode carrier further comprises: a connecting portion, located on a side of the first electrode away from the display particle layer and a side of the supporting portion away from the display particle layer, and connected between the first electrode and the supporting portion; Wherein, the connecting portion and the plurality of first electrodes are integrally formed.

9. The handwriting display panel according to claim 8, wherein: The supporting portion is made of insulating material.

10. The handwriting display panel according to any one of claims 2 to 4, wherein: The plurality of display particles include liquid crystal particles or electronic ink particles.

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