Display panel and display equipment

Abstract

The embodiment of the invention discloses a display panel and a display device, a pressure-sensitive conductive layer is arranged between a display structure and a first electrode layer, the longitudinal resistance value of a total film layer between a second electrode layer and the pressure-sensitive conductive layer is R1, the threshold voltage for driving the display structure is Vth, the longitudinal resistance value of the pressure-sensitive conductive layer in a non-pressing state is R2, and the longitudinal resistance value of the total film layer in the non-pressing state is R1. When the pressure-sensitive conductive layer is in a pressed state, the longitudinal resistance value of the pressing area is R3. In the local erasing mode, a first electric field is formed between the first electrode layer and the second electrode layer, and in the local erasing mode, R1, R2 and R3 meet the relation of # imgabs0 # to realize local erasing, so that touch control and pixel driving design are not needed, and the cost is reduced.

Description

Technical Field

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

[0002] With the popularization of electronic products and the improvement of environmental protection and health awareness, electronic handwriting products such as LCD handwriting tablets, electronic paper handwriting books, and conference electronic whiteboards have a trend of gradually replacing traditional draft paper, drawing paper, paper notebooks, ink whiteboards, chalk blackboards, etc. However, LCD handwriting tablets cannot partially erase and modify handwritten content or the partial erasure effect is poor and the contrast is low; electronic paper handwriting books are based on pixel drive and capacitive touch technology, resulting in high production costs; conference electronic whiteboards are based on pixel drive and capacitive touch technology, resulting in high backlight energy consumption, insufficient eye protection performance, and high costs. Summary of the invention

[0003] The embodiment of the present application provides a display panel that can achieve partial erasure of handwritten content without the need for pixel driving and touch control design.

[0004] An embodiment of the present application provides a display panel, comprising:

[0005] substrate;

[0006] A first electrode layer is disposed on the substrate;

[0007] a pressure-sensitive conductive layer, disposed on a side of the first electrode layer away from the substrate; and

[0008] a display structure, arranged on a side of the pressure-sensitive conductive layer away from the substrate, the display structure comprising a first substrate, a display layer, and a second electrode layer, the first substrate being stacked on a side of the pressure-sensitive conductive layer away from the substrate, the display layer being stacked on a side of the first substrate away from the substrate, and the second electrode layer being stacked on a side of the display layer away from the substrate;

[0009] The display panel has a local erasing mode, and in the local erasing mode, a first electric field is formed between the first electrode layer and the second electrode layer;

[0010] The longitudinal resistance of the total film layer between the second electrode layer and the pressure-sensitive conductive layer is R1, and the threshold voltage for driving the display structure is V th , the longitudinal resistance value of the pressure-sensitive conductive layer when it is in a non-pressed state is R2, and the longitudinal resistance value of the pressure-sensitive conductive layer in the pressed area when it is in a pressed state is R3;

[0011] In the local erase mode, the real-time voltage value driving the display structure is V 0 , V 0>V th , R1, R2 and R3 satisfy the following relationship:

[0012] R3<(V 0 / V th -1)R1<R2.

[0013] Optionally, in some embodiments of the present application, the display panel has a handwriting mode, in which a second electric field is formed between the first electrode layer and the second electrode layer, and the polarity of the second electric field is opposite to that of the first electric field;

[0014] In the handwriting mode, the real-time voltage value driving the display structure is V 1 , V 1 >V th , R1, R2 and R3 satisfy the following relationship:

[0015] R3<(V 1 / V th -1) R1<R2, where V 1 and V 0 The polarity is opposite.

[0016] Optionally, in some embodiments of the present application, V 1 =V 0 .

[0017] Optionally, in some embodiments of the present application, the display panel has a whole-surface erasing mode, in which a third electric field is formed between the first electrode layer and the second electrode layer, and the third electric field has a polarity opposite to that of the second electric field;

[0018] In the full-surface erasing mode, the real-time voltage value driving the display structure is V 2 , V 2 >V x , V x V 0 and V 1 The smallest of them, R1, R2 and R3 satisfy the following relationship:

[0019] R3<(V x / V th -1)R1<R2<(V 2 / V th -1) R1, where V 2 and V 0 The polarity is the same.

[0020] Optionally, in some embodiments of the present application, the first electrode layer and the second electrode layer are both provided on the entire surface.

[0021] Optionally, in some embodiments of the present application, the second electrode layer is arranged on the entire surface, the first electrode layer includes a plurality of electrode blocks, any two adjacent electrode blocks are arranged at intervals, the display layer includes a plurality of sub-pixels, one electrode block corresponds to one sub-pixel, and all the electrode blocks are electrically connected.

[0022] Optionally, in some embodiments of the present application, the pressure-sensitive conductive layer includes an elastic insulating layer and a conductor doped in the elastic insulating layer;

[0023] In the non-pressed state, the conductors have a first distance in the thickness direction of the display panel; in the pressed state, the conductors in the pressed area have a second distance in the thickness direction of the display panel, and the conductors are electrically connected to the first electrode layer; the first distance is greater than the second distance.

[0024] Optionally, in some embodiments of the present application, the thickness of the pressure-sensitive conductive layer is between 100 microns and 500 microns.

[0025] Optionally, in some embodiments of the present application, the pressure-sensitive conductive layer includes a conductor and a support member, the conductor and the support member are respectively arranged between the first substrate and the first electrode layer, and the support member is arranged between the conductor;

[0026] In the non-pressed state, the conductor and the first electrode layer are separated from each other; in the pressed state, the support member is squeezed, and the conductor in the pressed area is electrically connected to the first electrode layer in the thickness direction of the display panel.

[0027] Optionally, in some embodiments of the present application, in the non-pressed state, the thickness of the conductor in the thickness direction of the display panel is H1, the thickness of the support member in the thickness direction of the display panel is H2, and 2 / 3≤H1 / H2≤4 / 5.

[0028] Optionally, in some embodiments of the present application, the display layer is configured to have different bistable or multi-stable display states under the action of different electric fields.

[0029] Correspondingly, an embodiment of the present application further provides a display device, which includes an input pen and a display panel as described in any one of the above embodiments.

[0030] The display panel and the display device of the embodiment of the present application use a pressure-sensitive conductive layer disposed between the display structure and the first electrode layer. When the display panel needs to be partially erased, the area to be erased is pressed, the thickness of the pressure-sensitive conductive layer in the area to be erased becomes thinner, and the pressure-sensitive conductive layer in the area to be erased is electrically connected to the first electrode layer, so that the resistance value of the area to be erased is reduced. At the same time, based on R3<(V 0 / V th -1) R1<R2, so that the voltage value V of the display structure driving the area to be erased 0 Greater than the threshold voltage V th , so as to generate a first electric field in the area to be erased to achieve local erasure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0032] Figure 2 is another structural schematic diagram of a display panel provided in an embodiment of the present application;

[0033] Figure 3 is based on Figure 1 or Figure 2 A schematic diagram of a structure in which a pressure-sensitive conductive layer in a display panel is in a non-pressed state;

[0034] Figure 4 is based on Figure 1 or Figure 2 A schematic diagram of a structure in which a pressure-sensitive conductive layer in a display panel is in a pressed state;

[0035] Figure 5 is based on Figure 1 A structural schematic diagram of step B01 of a method for preparing a display panel;

[0036] Figure 6 is based on Figure 1 A structural schematic diagram of step B02 of the method for preparing a display panel;

[0037] Figure 7 is another structural schematic diagram of a display panel provided in an embodiment of the present application;

[0038] Figure 8 is based on Figure 7 A schematic diagram of a structure in which a pressure-sensitive conductive layer in a display panel is in a non-pressed state;

[0039] Fig. 9 is based on Figure 7 A schematic diagram of a structure in which a pressure-sensitive conductive layer in a display panel is in a pressed state;

[0040] Fig.10 is based on Figure 7A structural schematic diagram of step B11 of a method for preparing a display panel;

[0041] Fig.11 is based on Figure 7 A structural schematic diagram of step B12 of the method for preparing a display panel;

[0042] Fig.12 is based on Figure 7 A structural schematic diagram of step B13 of the method for preparing a display panel;

[0043] Fig.13 It is a schematic diagram of the structure of the display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the various embodiments can be combined with each other but will not be repeated one by one, and in the absence of contrary instructions, the directional words used, such as "upper" and "lower", usually refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.

[0045] The embodiments of the present application provide a display panel and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] Please refer to Figure 1 An embodiment of the present application provides a display panel 100 , which includes a substrate 11 , a first electrode layer 12 , a pressure-sensitive conductive layer 13 and a display structure 14 .

[0047] The first electrode layer 12 is disposed on the substrate 11. The pressure-sensitive conductive layer 13 is disposed on a side of the first electrode layer 12 away from the substrate 11. The display structure 14 is disposed on a side of the pressure-sensitive conductive layer 13 away from the substrate 11.

[0048] The display structure 14 includes a first substrate 141, a display layer 142, and a second electrode layer 143. The first substrate 141 is stacked on a side of the pressure-sensitive conductive layer 13 away from the substrate 11. The display layer 142 is stacked on a side of the first substrate 141 away from the substrate 11. The second electrode layer 143 is stacked on a side of the display layer 142 away from the substrate 11.

[0049] The display panel 100 has a partial erasing mode. In the partial erasing mode, a first electric field is formed between the first electrode layer 12 and the second electrode layer 143.

[0050] The longitudinal resistance of the total film layer between the second electrode layer 143 and the pressure-sensitive conductive layer 13 is R1, and the threshold voltage of the driving display structure 14 is V th The longitudinal resistance value of the pressure-sensitive conductive layer 13 when it is in a non-pressed state is R2, and the longitudinal resistance value of the pressed area of ​​the pressure-sensitive conductive layer 13 when it is in a pressed state is R3.

[0051] In the local erase mode, the real-time voltage value of the driving display structure 14 is V 0 , V 0 >V th , R1, R2 and R3 satisfy the following relationship:

[0052] R3<(V 0 / V th -1)R1<R2.

[0053] It should be understood that the total film layer between the second electrode layer 143 and the pressure-sensitive conductive layer 13 does not include the second electrode layer 143 and the pressure-sensitive conductive layer 13. The longitudinal resistance is the resistance of the characteristic body in the thickness direction of the display panel 100. The first electrode layer 12 and the second electrode layer 143 are respectively connected to a voltage signal to form an electric field on the entire surface. That is, in the same mode, the entire first electrode layer 12 is configured to be connected to the same voltage signal, and the entire second electrode layer 143 is configured to be connected to another voltage signal.

[0054] The total film layer between the second electrode layer 143 and the pressure-sensitive conductive layer 13 is directly connected to the pressure-sensitive conductive layer 13. Then the voltage value required for the pressed area in the partial erase mode is VR1′, VR1′=V 0 R1 / (R1+R3), the voltage required for the non-pressed area is VR1, VR1=V 0 ·R1 / (R1+R2).

[0055] Because the pressed area needs to be erased, VR1′>V th , so we need To achieve the erase function; the non-pressed area does not need to be erased, and VR1 < V th , so we need to avoid erasure.

[0056] The display panel 100 of the embodiment of the present application uses a pressure-sensitive conductive layer 13 disposed between the display structure 14 and the first electrode layer 12. When the display panel 100 needs to be partially erased, the area to be erased is pressed, and the thickness of the pressure-sensitive conductive layer 13 in the area to be erased becomes thinner. The pressure-sensitive conductive layer 13 in the area to be erased is electrically connected to the first electrode layer 12, so that the resistance value of the area to be erased is reduced. At the same time, based on R3<(V 0 / V th -1) R1<R2, so that the voltage value V of the display structure driving the area to be erased 0 Greater than the threshold voltage V th , so as to generate a first electric field in the area to be erased to achieve local erasure.

[0057] Secondly, based on the setting of the pressure-sensitive conductive layer 13 and the first electrode layer 12, the first electrode layer 12 can only be connected to a voltage signal, without forming a thin film transistor array to drive a plurality of pixel electrodes, and without additionally preparing a touch electrode layer and a touch chip, which saves process steps, simplifies the structure and reduces costs.

[0058] It should be noted that the display layer 142 is configured to have different display states of bistable or multi-stable under different electric fields. The display layer 142 is bistable, that is, the display structure 14 can switch between two stable display states, for example, from black to white, and once switched to a certain state, even if the electric field is removed, the display structure 14 will maintain this state until it receives the next electric field stimulus for switching. Multi-stable is the switching between more than two stable display states. For example, in addition to black and white, other colors or patterns such as gray, red, and blue can also be included. Based on this, the display structure 14 includes but is not limited to electrophoretic display, electronic ink display, and cholesteric liquid crystal display.

[0059] In addition, the display structure 14 further includes a second substrate 144 disposed on the second electrode layer 143 .

[0060] The substrate 11 includes a substrate and a driving circuit disposed on the substrate, the driving circuit includes devices such as thin film transistors, the thin film transistors are connected to the first electrode layer 12, and the driving circuit is configured to provide a voltage signal to the first electrode layer 12. The substrate 11 can be glass, PCB, acrylic, etc.

[0061] In some embodiments, the substrate 11 may also be a simple substrate, such as glass, PCB, acrylic, etc.

[0062] The material of the first electrode layer 12 is a conductive material, which may be a metal, a metal alloy or a metal oxide, such as indium tin oxide, molybdenum, titanium, aluminum, etc.

[0063] The material of the second electrode layer 143 is a transparent conductive material, such as indium tin oxide, aluminum-doped zinc oxide, fluorine-doped tin oxide, indium zinc oxide, etc.

[0064] The pressure-sensitive conductive layer 13 is configured to be non-conductive in the lateral direction and conductive in the axial direction.

[0065] In some embodiments of the present application, the display panel 100 has a handwriting mode. In the handwriting mode, a second electric field is formed between the first electrode layer 12 and the second electrode layer 143 , and the polarity of the second electric field is opposite to that of the first electric field.

[0066] In the handwriting mode, the real-time voltage value of the driving display structure 14 is V 1 , V 1 >V th , R1, R2 and R3 satisfy the following relationship:

[0067] R3<(V 1 / V th -1) R1<R2, where V 1 and V 0 The polarity is opposite.

[0068] Understandably, V 1 and V 0 The polarity is opposite, that is, V 1 and V 0 One is a negative voltage and the other is a positive voltage, such as V in handwriting mode. 1 is the forward voltage, V in partial erase mode 0 is a negative voltage. Secondly, when switching between the handwriting mode and the local erasing mode, the voltage connected to the second electrode layer 143 remains unchanged. For example, the voltage connected to the second electrode layer 143 is 0 volts, and in the handwriting mode, the voltage connected to the first electrode layer 12 is 15 volts; in the local erasing mode, the voltage connected to the first electrode layer 12 is -15 volts. Based on the opposite polarity of the voltage input to the first electrode layer 12, the polarities of the first electric field and the second electric field are also opposite.

[0069] In addition, the handwriting area in the handwriting mode is equivalent to the pressing area, and the non-handwriting area is equivalent to the non-pressing area. Then the voltage value required for the handwriting area in the handwriting mode is Vr1′, Vr1′=V 1 R1 / (R1+R3), the voltage required for the non-handwritten area is Vr1, Vr1=V 1 ·R1 / (R1+R2).

[0070] Because the handwriting area needs to be pressed, Vr1′>V th , so we need To achieve the handwriting function; the non-handwriting area does not need to be pressed, and Vr1<V th , so we need

[0071] In some embodiments of the present application, V 1 =V 0 . V 1 and V 0 The voltage values ​​are the same to maintain the same electric field force, thereby reducing the risk of flickering during mode switching and reducing the risk of different display brightness between the two modes.

[0072] Optionally, in some embodiments, V 1 and V 0 The voltage value can be different as long as it can drive the display structure 14.

[0073] In some embodiments of the present application, the display panel 100 has a full-surface erasing mode. In the full-surface erasing mode, a third electric field is formed between the first electrode layer 12 and the second electrode layer 143 , and the third electric field has a polarity opposite to that of the second electric field.

[0074] In the full-surface erasing mode, the real-time voltage value of the driving display structure 14 is V 2 , V 2 >V x , V x V 0 and V 1 The smallest of them, R1, R2 and R3 satisfy the following relationship:

[0075] R3<(V x / V th -1)R1<R2<(V 2 / V th -1) R1, where V 2 and V 0 The polarity is the same.

[0076] Understandably, V 2 and V 0 The polarity is the same, that is, V 2 and V 0The polarity is the same as the negative voltage or the positive voltage. Secondly, when switching between the handwriting mode and the full-surface erasing mode, the voltage connected to the second electrode layer 143 remains unchanged. For example, the voltage connected to the second electrode layer 143 is 0 volts, and in the handwriting mode, the voltage connected to the first electrode layer 12 is 15 volts; in the full-surface erasing mode, the voltage connected to the first electrode layer 12 is -20 volts. Based on the opposite polarity of the voltage input to the first electrode layer 12, the polarity of the third electric field and the second electric field is also opposite.

[0077] In addition, in the full-surface erasing mode, the entire display structure 14 is driven. That is, both the driving voltage of the pressed area and the driving voltage of the non-pressed area need to be greater than the threshold voltage V th Then the voltage required for the pressed area in the full-surface erase mode is Vr′1′, Vr′1′=V x R1 / (R1+R3), the voltage required for the non-pressed area is Vr′1, Vr′1=V 2 ·R1 / (R1+R2).

[0078] Because the pressing area needs to be pressed, Vr′1′>V th , so we need To achieve the handwriting function; the non-press area does not need to be pressed, and Vr′1>V th , so we need

[0079] In some embodiments of the present application, the first electrode layer 12 and the second electrode layer 143 are both disposed on the entire surface. Wherein, the first electrode layer 12 and the second electrode layer 143 disposed on the entire surface do not require a photomask, thus simplifying the manufacturing process.

[0080] Optional, see Figure 2 In some embodiments of the present application, the second electrode layer 143 is provided on the entire surface. The first electrode layer 12 includes a plurality of electrode blocks 121, and any two adjacent electrode blocks 121 are arranged at intervals. The display layer 142 includes a plurality of sub-pixels 14a, and one electrode block 121 corresponds to one sub-pixel 14a. All electrode blocks 121 are electrically connected.

[0081] The first electrode layer 12 is patterned, and adjacent electrode blocks 121 are spaced apart from each other, which can improve the erasing accuracy.

[0082] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the pressure-sensitive conductive layer 13 includes an elastic insulating layer 131 and a conductor 132 doped in the elastic insulating layer 131 .

[0083] In the non-pressed state, the conductors 132 have a first distance K1 in the thickness direction of the display panel 100 . Figure 3 In the pressed state, the conductors 132 in the pressed area have a second distance K2 in the thickness direction of the display panel 100, and the conductors 132 are electrically connected to the first electrode layer 12, as shown in FIG. Figure 4 The first distance K1 is greater than the second distance K2.

[0084] The first distance K1 and the second distance K2 are respectively the center distances between the conductors 132. In the non-pressed state, the first distance K1 between the conductors 132 is large, so that the conductors 132 are not conductive; in the pressed state, the elastic insulating layer 131 is squeezed, and the distance between the conductors 132 is reduced, that is, the second distance K2 becomes smaller, and even the conductors 132 are connected to achieve conductivity.

[0085] Optionally, the material of the conductor 132 may be metal particles, metal oxide particles, carbon fibers, or the like.

[0086] Optionally, in some embodiments of the present application, the thickness of the pressure-sensitive conductive layer 13 is between 100 micrometers and 500 micrometers.

[0087] It is understandable that if the thickness of the pressure-sensitive conductive layer 13 is too large, the resistance will be too large, and the pressure required for pressing will be greater, resulting in reduced sensitivity; while if the thickness is too small, the elasticity will be insufficient and it will be easily pressed through. Therefore, based on the consideration of sensitivity and stability, the thickness of the pressure-sensitive conductive layer 13 is designed to be between 100 microns and 500 microns, for example, 100 microns, 200 microns, 300 microns, 400 microns or 500 microns.

[0088] based on Figure 1 The method for preparing the display panel 100 of the embodiment of the present application includes the following steps:

[0089] Please refer to Figure 5 , step B01, forming a first electrode layer 12 on a substrate 11. Then proceeding to step B02.

[0090] Please refer to Figure 6 , step B02, forming or attaching a pressure-sensitive conductive layer 13 on the first electrode layer 12. Then proceeding to step B03.

[0091] Please refer to Figure 1 , step B03, forming or attaching a display structure 14 on the pressure-sensitive conductive layer 13.

[0092] In this way, the preparation process of the display panel 100 according to the embodiment of the present application is completed.

[0093] Figure 7 Another structural schematic diagram of the display panel 100 according to an embodiment of the present application is shown. Figure 8 The corresponding Figure 7 A schematic diagram of the pressure-sensitive conductive layer 13 in a non-pressed state in the embodiment, Fig. 9 The corresponding Figure 7 A schematic diagram of the pressure-sensitive conductive layer 13 in a pressed state in the embodiment.

[0094] exist Figures 7 to 9 In the present invention, parts different from those of the above-described embodiment will be described to avoid redundancy.

[0095] Reference Figures 7 to 9 In some embodiments of the present application, the pressure-sensitive conductive layer 13 includes a conductor 132 and a support member 133 , the conductor 132 and the support member 133 are respectively arranged between the first substrate 141 and the first electrode layer 12 , and the support member 133 is arranged between the conductor 132 .

[0096] In the non-pressed state, the conductor 132 is spaced apart from the first electrode layer 12 . In the pressed state, the support member 133 is pressed, and the conductor 132 in the pressed area is electrically connected to the first electrode layer 12 in the thickness direction of the display panel 100 .

[0097] It can be understood that the thickness of the conductor 132 in the thickness direction of the display panel 100 is H1, and the thickness of the support member 133 in the thickness direction of the display panel 100 is H2. In the non-pressed state, H2>H1, so that the conductor 132 and the first electrode layer 12 are separated and non-conductive. Figure 8 In the pressed state, the support member 133 is squeezed, and the thickness H2 of the support member 133 becomes smaller, so that the conductor 132 contacts the first electrode layer 12 to achieve conduction, as shown in FIG. Fig. 9 shown.

[0098] In some embodiments of the present application, in the non-pressed state, 2 / 3≤H1 / H2≤4 / 5. The smaller the value of H1 / H2, the farther the conductor 132 is from the first electrode layer 12 in the non-pressed state, and the worse the pressing sensitivity; the larger the value of H1 / H2, the closer the conductor 132 is to the first electrode layer 12 in the non-pressed state, the better the pressing sensitivity, and the easier it is to cause a false touch. Therefore, based on the above considerations, 2 / 3≤H1 / H2≤4 / 5 is designed, for example, it can be 2 / 3, 3 / 4 or 4 / 5.

[0099] Optionally, the support member 133 is made of an elastic insulating material, such as resin. The conductor 132 is made of metal, metal alloy or metal oxide.

[0100] The pattern of the conductor 132 in a plane perpendicular to the surface of the display panel 100 may be a trapezoid, a rectangle, or any other shape.

[0101] Optionally, in some embodiments, a groove 12a is provided in a region of the first electrode layer 12 corresponding to the conductor 132. In the pressing mode, the conductor 132 is disposed in the groove 12a.

[0102] It should be noted that the contact connection between the conductor 132 and the groove 12 a increases the contact area between the conductor 132 and the first electrode layer 12 , thereby reducing the contact resistance and achieving the effect of improving sensitivity.

[0103] Optionally, the surface of the conductor 132 facing the first electrode layer 12 is a convex surface, and the groove 12a has a concave surface that matches and contacts the convex surface. The contact mode of the concave-convex surface can further increase the contact area between the conductor 132 and the first electrode layer 12, reduce the contact resistance and improve the sensitivity.

[0104] Optionally, the distance between the support members 133 is between 100 μm and 1000 μm, such as 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm or 1000 μm. The distance between two adjacent conductors 132 is equal to or slightly greater than the width of the support member 133 .

[0105] Optionally, in a non-pressed state, the distance between two adjacent conductors 132 is slightly larger than the width of the support member 133 , so that in a pressed state, the strength of the support member 133 squeezing the conductors 132 is reduced to protect the conductors 132 .

[0106] based on Figure 7 The method for preparing the display panel 100 of the embodiment of the present application includes the following steps:

[0107] Please refer to Fig.10 , step B11, forming a first electrode layer 12 on the substrate 11. Then proceed to step B12 and / or step B13.

[0108] Please refer to Fig.11 , step B12, forming a support member 133 on the first electrode layer 12 to form a first module.

[0109] Please refer to Fig.12 , step B13, forming a conductor 132 on the display structure 14 to form a second module. Wherein, step B12 and step B13 are not preceded or followed.

[0110] Please refer to Figure 7 , step B14, combining the first module and the second module.

[0111] In this way, the preparation process of the display panel 100 according to the embodiment of the present application is completed.

[0112] Please refer to Fig.13 Accordingly, an embodiment of the present application further provides a display device 1000, which includes an input pen 200 and a display panel 100 as described in any one of the above embodiments.

[0113] Optionally, the pressing diameter of the input pen 200 is generally between 1 mm and 2 mm, and the pressure applied by the input pen 200 to the display panel 100 is between 0.5 Newton and 2 Newton.

[0114] In the partial erasing mode, when the input pen 200 presses the display panel 100, R1, R2 and R3 satisfy the relationship: R3<(V 0 / V th -1) R1<R2 to ensure effective input of the input pen 200.

[0115] It is understood that the structure of the display panel 100 of the display device 1000 of the embodiment of the present application is similar to or the same as the structure of the display panel 100 of the above embodiment. Figures 1 to 12 The explanation will not be repeated here.

[0116] The display device 1000 of the embodiment of the present application uses a pressure-sensitive conductive layer 13 disposed between the display structure 14 and the first electrode layer 12. When the display panel 100 needs to be partially erased, the area to be erased is pressed, and the thickness of the pressure-sensitive conductive layer 13 in the area to be erased becomes thinner. The pressure-sensitive conductive layer 13 in the area to be erased is electrically connected to the first electrode layer 12, so that the resistance value of the area to be erased is reduced. At the same time, based on R3<(V 0 / V th -1) R1<R2, so that the voltage value V of the display structure driving the area to be erased 0 Greater than the threshold voltage V th , so as to generate a first electric field in the area to be erased to achieve local erasure.

[0117] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, characterized in that: include: substrate; A first electrode layer is disposed on the substrate; A pressure-sensitive conductive layer is arranged on a side of the first electrode layer away from the substrate; as well as a display structure, arranged on a side of the pressure-sensitive conductive layer away from the substrate, the display structure comprising a first substrate, a display layer, and a second electrode layer, the first substrate being stacked on a side of the pressure-sensitive conductive layer away from the substrate, the display layer being stacked on a side of the first substrate away from the substrate, and the second electrode layer being stacked on a side of the display layer away from the substrate; The display panel has a local erasing mode, and in the local erasing mode, a first electric field is formed between the first electrode layer and the second electrode layer; The longitudinal resistance of the total film layer between the second electrode layer and the pressure-sensitive conductive layer is R1, and the threshold voltage for driving the display structure is V th , the longitudinal resistance value of the pressure-sensitive conductive layer when it is in a non-pressed state is R2, and the longitudinal resistance value of the pressure-sensitive conductive layer in the pressed area when it is in a pressed state is R3; In the local erasing mode, the real-time voltage value driving the display structure is V0, V0>V th , R1, R2 and R3 satisfy the following relationship: R3<(V0 / V th -1)R1<R2.

2. The display panel according to claim 1, characterized in that: The display panel has a handwriting mode. In the handwriting mode, a second electric field is formed between the first electrode layer and the second electrode layer, and the polarity of the second electric field is opposite to that of the first electric field. In the handwriting mode, the real-time voltage value driving the display structure is V1, V1>V th , R1, R2 and R3 satisfy the following relationship: R3<(V1 / V th -1) R1<R2, where V1 and V0 have opposite polarities.

3. The display panel according to claim 2, characterized in that: V1=V0.

4. The display panel according to claim 2, characterized in that: The display panel has a full-surface erasing mode. In the full-surface erasing mode, a third electric field is formed between the first electrode layer and the second electrode layer, and the third electric field has a polarity opposite to that of the second electric field. In the full-surface erasing mode, the real-time voltage value driving the display structure is V2, V2>V x , V x is the minimum of V0 and V1, and R1, R2 and R3 satisfy the following relationship: R3<(V x / V th -1)R1<R2<(V2 / V th -1)R1, where V2 and V0 have the same polarity.

5. The display panel according to claim 4, characterized in that: The first electrode layer and the second electrode layer are both disposed on the entire surface.

6. The display panel according to claim 4, characterized in that: The second electrode layer is arranged on the entire surface, the first electrode layer includes a plurality of electrode blocks, any two adjacent electrode blocks are arranged at intervals, the display layer includes a plurality of sub-pixels, one electrode block corresponds to one sub-pixel, wherein all the electrode blocks are electrically connected.

7. The display panel according to any one of claims 1 to 6, characterized in that: The pressure-sensitive conductive layer includes an elastic insulating layer and a conductor doped in the elastic insulating layer; In the non-pressed state, there is a first distance between the conductors in the thickness direction of the display panel; In the pressed state, the conductors in the pressed area have a second distance in the thickness direction of the display panel, and the conductors are electrically connected to the first electrode layer; and the first distance is greater than the second distance.

8. The display panel according to claim 7, characterized in that: The thickness of the pressure-sensitive conductive layer is between 100 micrometers and 500 micrometers.

9. The display panel according to any one of claims 1 to 6, characterized in that: The pressure-sensitive conductive layer includes a conductor and a support member, wherein the conductor and the support member are respectively arranged between the first substrate and the first electrode layer, and the support member is arranged between the conductors; In the non-pressed state, the conductor and the first electrode layer are separated from each other; in the pressed state, the support member is squeezed, and the conductor in the pressed area is electrically connected to the first electrode layer in the thickness direction of the display panel.

10. The display panel according to claim 9, characterized in that: In the non-pressed state, the conductor has a thickness H1 in the thickness direction of the display panel, the support has a thickness H2 in the thickness direction of the display panel, and 2 / 3≤H1 / H2≤4 / 5.

11. The display panel according to any one of claims 1 to 6, characterized in that: The display layer is configured to have different bistable or multi-stable display states under the action of different electric fields.

12. A display device, characterized in that: It comprises an input pen and a display panel as described in any one of claims 1-11.

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