Display screen and spliced display device

Abstract

The application belongs to the technical field of display, and particularly relates to a display screen and a spliced display device, the display screen has a display area and a frame area located at the edge of the display area, and the display screen comprises: a first substrate; a second substrate which is arranged in a box with the first substrate; a deformation support structure which is arranged in the frame area, the deformation support structure comprises a deformation support column and oppositely arranged first and second magnetic poles, the first magnetic pole is formed on the first substrate, the second magnetic pole is formed on the second substrate, the deformation support column is formed on the first substrate and located between the first and second magnetic poles, and a magnetorheological material is encapsulated in the deformation support column; wherein the first and second magnetic poles are configured to generate a target magnetic field according to a target pressure suffered by the frame area, and magnetic particles in the magnetorheological material are configured to arrange to form a target support body under the action of the target magnetic field. The display screen and the spliced display device provided by the application can improve the stability of the spliced display device.

Description

Technical Field

[0001] This disclosure belongs to the field of display technology, specifically relating to a display screen and a splicing display device. Background Technology

[0002] Liquid Crystal Display (LCD) panels are widely used in outdoor displays due to their low cost and high resolution. Large-screen displays are typically achieved by splicing multiple LCD panels together to create a video wall display. However, in video wall displays, the bezel area of ​​the LCD panel is prone to deformation during display, leading to a decrease in the stability of the LCD panel.

[0003] Therefore, improving the stability of splicing display devices has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides a display screen and a splicing display device, which solves the problem of poor stability of splicing display devices.

[0005] In a first aspect, this application provides a display screen having a display area and a border area located at the edge of the display area. The display screen includes: a first substrate; a second substrate disposed opposite to the first substrate; and a deformation support structure disposed in the border area. The deformation support structure includes a deformation support post and a first magnetic pole and a second magnetic pole disposed opposite to each other. The first magnetic pole is formed on the first substrate, the second magnetic pole is formed on the second substrate, the deformation support post is formed on the first substrate and located between the first magnetic pole and the second magnetic pole, and the deformation support post is internally encapsulated with a magnetorheological material. The first magnetic pole and the second magnetic pole are configured to generate a target magnetic field according to a target pressure applied to the border area, and the magnetic particles in the magnetorheological material are configured to align under the action of the target magnetic field to form a target support.

[0006] Optionally, the display screen further includes a deformation detection unit disposed in the frame area, the deformation detection unit being electrically connected to the first magnetic pole and the second magnetic pole, and the deformation detection unit being configured to detect the target pressure on the frame area.

[0007] Optionally, the deformation detection unit includes: a first electrode and a second electrode disposed opposite to each other, one of which is formed on the first substrate and spaced apart from the first magnetic pole, and the other is formed on the second substrate and spaced apart from the second magnetic pole; a detection post, including a post body and a conductive layer, a first end of the post body being formed on the first electrode, the conductive layer being connected to the first electrode and wrapping around the second end of the post body, the surface of the conductive layer near the second electrode being a conductive arc surface and spaced apart from the second electrode; wherein, the conductive arc surface can contact the second electrode when the frame area is compressed, so as to generate a current between the first electrode and the second electrode, and the magnitude of the current between the first electrode and the second electrode is configured to be related to the magnitude of the target pressure on the frame area.

[0008] Optionally, the deformation detection unit further includes: a detection circuit connected to the first electrode and the second electrode, configured to detect the magnitude of the current between the first electrode and the second electrode; and a control circuit connected to the detection circuit, the first magnetic pole, and the second magnetic pole, the control circuit being configured to determine the target pressure on the frame area based on the magnitude of the current detected by the detection circuit, and further configured to control the first magnetic pole and the second magnetic pole to generate a target magnetic field based on the target pressure.

[0009] Optionally, the conductive layer includes at least a graphene layer, and the outer surface of the column is wrapped with the graphene layer.

[0010] Optionally, the display screen further includes: a frame support column disposed in the frame area and located between the first substrate and the second substrate; wherein the length of the frame support column is greater than that of the detection column, and the length of the detection column is greater than that of the deformation support column.

[0011] Optionally, the length of the detection column is greater than a first preset threshold and less than a second preset threshold; wherein, the first preset threshold is the sum of 4 / 3 times the step difference and the length of the deformation support column, and the second preset threshold is the sum of 3 / 2 times the step difference and the length of the deformation support column, and the step difference is obtained based on the difference between the lengths of the frame support column and the deformation support column.

[0012] Optionally, the filling volume of the magnetorheological material in the deformation support column is any value between 1 / 2 and 1 / 3 of the total volume of the deformation support column.

[0013] Optionally, the display screen further includes: a frame support column disposed in the frame area and located between the first substrate and the second substrate; a main display support column and a secondary display support column, both disposed in the display area and located between the first substrate and the second substrate; wherein the length of the deformation support column is greater than that of the secondary display support column, the length of the main display support column is greater than that of the secondary display support column, and the supporting force of the main display support column is greater than that of the frame support column.

[0014] Secondly, this application provides a splicing display device, the splicing display device comprising: a display screen as described in the first aspect, wherein at least two display screens are provided and spliced ​​together; and a compensation display panel disposed in the splicing seam area of ​​adjacent display screens and covering the border area of ​​adjacent display screens.

[0015] The technical solution provided in this application has at least the following beneficial effects:

[0016] This application sets up a deformation support structure in the bezel area. After the bezel area deforms under target pressure, if it is subjected to the squeezing force of the compensation splicing screen or external mechanical stress, the first and second magnetic poles will be energized. A target magnetic field will be generated between the first and second magnetic poles. The magnetorheological material will be aligned under the action of the target magnetic field to form a target support body, which supports the deformed area of ​​the bezel area and restores the deformed area, ensuring that the bezel area of ​​the display screen can display normally, thereby improving the stability of the display screen and ensuring the display effect. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] Figure 1 A structural diagram of a display screen provided in an embodiment of this application is shown.

[0019] Figure 2 This paper shows a structural diagram of another display screen provided in an embodiment of this application.

[0020] Figure 3 A structural diagram of a magnetorheological material provided in an embodiment of this application is shown.

[0021] Figure 4 A schematic diagram of another display screen provided in an embodiment of this application is shown.

[0022] Figure 5A top view of a splicing display device provided in an embodiment of this application is shown.

[0023] Figure 6 A side view of a splicing display device provided in an embodiment of this application is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] A1, Display area; A2, Frame area; 110, First substrate; 120, Second substrate; 210, First magnetic pole; 220, Second magnetic pole; 230, Deformation support column; 240, Magnetorheological material; 300, Deformation detection unit; 310, First electrode; 320, Second electrode; 330, Detection column; 331, Column; 332, Conductive layer; 241, Magnetic particles; 242, Base liquid; 243, Non-woven fiber; 244, Magnetic field direction; 400, Frame support column; 500, Main display support column; 600, Secondary display support column; B, Compensation display panel. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0027] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0028] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0029] Figure 1 A structural diagram of a display screen provided in an embodiment of this application is shown below. Please refer to [link / reference]. Figure 1 As shown, the display screen has a display area A1 and a border area A2 located at the edge of the display area A1. Figure 2 A structural diagram of another display screen provided in an embodiment of this application is shown. Please refer to [link / reference]. Figure 1 and Figure 2 As shown, the display screen includes: a first substrate 110, a second substrate 120, and a deformation support structure.

[0030] The second substrate 120 is disposed opposite to the first substrate 110; the first substrate 110 can be a CF substrate (Color Filter Substrate); the second substrate 120 can be an Array substrate, also commonly referred to as a TFT substrate (Thin Film Transistor Substrate).

[0031] A deformation support structure is disposed in the frame area A2. The deformation support structure includes a deformation support post 230 and a first magnetic pole 210 and a second magnetic pole 220 disposed opposite to each other. The first magnetic pole 210 is formed on the first substrate 110, the second magnetic pole 220 is formed on the second substrate 120, the deformation support post 230 is formed on the first substrate 110 and located between the first magnetic pole 210 and the second magnetic pole 220, and the deformation support post 230 is encapsulated with a magnetorheological material 240.

[0032] The first magnetic pole 210 and the second magnetic pole 220 are configured to generate a target magnetic field based on the target pressure on the frame region A2, and the magnetic particles 241 in the magnetorheological material 240 are configured to arrange themselves under the action of the target magnetic field to form a target support.

[0033] Figure 3 A structural diagram of a magnetorheological material provided in an embodiment of this application is shown. Please refer to [link / reference]. Figure 3 As shown, the magnetorheological material 240 can be a magnetorheological fluid (MRF), including: magnetic particles 241, a base fluid 242, nonwoven fibers 243, and additives. The magnetic particles 241 can be carbon-based iron powder, etc., and the base fluid 242 can be silicone oil, etc. In the absence of a magnetic field, the magnetic particles 241 are randomly dispersed in the base fluid 242, and the material is a low-viscosity fluid. Under shearing action, the particles easily slide, and the damping force is provided by the viscosity of the base fluid 242, resulting in a relatively small damping force. Under the action of a target magnetic field, for example, when the target magnetic field direction 244 is vertical, the target magnetic field will induce the magnetic particles 241 to move along the magnetic field direction 244, forming a target support. The target support can be a chain-like, columnar, or other shape with supporting force. The supporting shape of the target support is in the same direction as the target magnetic field. For example, when subjected to a vertical target magnetic field, the target support will also form a columnar or chain-like shape, generating a vertical supporting force.

[0034] The strength of the target magnetic field determines the number, density, and strength of the magnetic particles 241 in the target support, thereby linearly or nonlinearly adjusting the magnitude of the supporting force. The entire process can achieve millisecond-level response without hysteresis and enables the recycling of the magnetorheological material 240. When the magnetic particles 241 are arranged in the target support, the shear modulus and damping coefficient of the material can be improved, achieving coordinated control of stiffness and damping.

[0035] This application provides a deformation support structure in the bezel area A2. When the bezel area A2 deforms under target pressure, and is subjected to the squeezing force of the compensation splicing screen or external mechanical stress, the first magnetic pole 210 and the second magnetic pole 220 will be energized. A target magnetic field will be generated between the first magnetic pole 210 and the second magnetic pole 220. The magnetorheological material 240 will align under the action of the target magnetic field to form a target support body, thereby supporting the deformed area of ​​the bezel area A2 and restoring the deformed area, ensuring that the bezel area A2 of the display screen can be displayed normally, thus improving the stability of the display screen and ensuring the display effect.

[0036] Please see Figure 2 As shown, the display screen also includes a deformation detection unit 300, which is disposed in the frame area A2. The deformation detection unit 300 is electrically connected to the first magnetic pole 210 and the second magnetic pole 220. The deformation detection unit 300 is configured to detect the target pressure on the frame area A2.

[0037] In some embodiments, the deformation detection unit 300 is disposed in the frame area A2 to detect the target pressure on the frame area A2, thereby detecting the degree of deformation of the frame area A2. The deformation detection unit 300 is electrically connected to the first magnetic pole 210 and the second magnetic pole 220 to realize the generation of the target magnetic field by controlling the first magnetic pole 210 and the second magnetic pole 220 according to the target pressure.

[0038] Please see Figure 2 As shown, the deformation detection unit 300 includes: a first electrode 310, a second electrode 320, and a detection post 330.

[0039] The first electrode 310 and the second electrode 320 are arranged opposite to each other. One of them is formed on the first substrate 110 and spaced apart from the first magnetic pole 210, while the other is formed on the second substrate 120 and spaced apart from the second magnetic pole 220. By arranging the first electrode 310 and the first magnetic pole 210 spaced apart, and the second substrate 120 spaced apart from the second magnetic pole 220, the target pressure of deformation can be detected in the adjacent area of ​​the support structure, thereby enabling the support force generated by the support structure to accurately support the deformation area.

[0040] The detection column 330 includes a column body 331 and a conductive layer 332. A first end of the column body 331 is formed on a first electrode. The conductive layer 332 is connected to the first electrode and wraps around a second end of the column body 331. The surface of the conductive layer 332 near the second electrode 320 is a conductive arc surface and is spaced apart from the second electrode 320. The conductive layer 332 can completely cover the entire column body 331 or partially cover it, as long as it conducts electricity with the first electrode 310. For example, the conductive layer 332 includes at least a graphene layer, and the outer surface of the column body 331 is wrapped with the graphene layer. The graphene layer has good conductivity; by using a graphene layer as the conductive layer 332, the accuracy of the detected current can be higher, thus making the detected target pressure more accurate. The materials of the first electrode 310, the second electrode 320, and the conductive layer 332 can be the same or different.

[0041] The conductive arc surface can contact the second electrode 320 when the frame area A2 is pressed, so that a current is generated between the first electrode 310 and the second electrode 320. The magnitude of the current between the first electrode 310 and the second electrode 320 is configured to be related to the magnitude of the target pressure on the frame area A2.

[0042] In some embodiments, when the frame area A2 is under pressure, the conductive arc surface of the conductive layer 332 will contact the second electrode 320. As the pressure increases, the contact area between the conductive arc surface and the second electrode 320 will increase, and the current between the first electrode 310 and the second electrode 320 will increase accordingly, so that the target pressure can be determined according to the magnitude of the current.

[0043] In some embodiments, the deformation detection unit 300 further includes a detection circuit connected to the first electrode 310 and the second electrode 320, configured to detect the magnitude of the current between the first electrode 310 and the second electrode 320. Specifically, the detection circuit may be a circuit including a current sensor, capable of detecting the magnitude of the current between the first electrode 310 and the second electrode 320 to determine the received target pressure based on the current magnitude.

[0044] The control circuit is connected to the detection circuit, the first magnetic pole 210, and the second magnetic pole 220. The control circuit is configured to determine the target pressure on the frame area A2 based on the magnitude of the current detected by the detection circuit, and is also configured to control the first magnetic pole 210 and the second magnetic pole 220 to generate a target magnetic field based on the target pressure. The control circuit can switch according to the detected current magnitude to determine the target pressure on the frame area A2, and can determine the magnitude of the target magnetic field based on the target pressure, thereby enabling the formed target support to support the deformed area, restoring the deformation of the frame area A2, and ensuring the display effect of the screen. Specifically, the control circuit can be a controller.

[0045] Please see Figure 2As shown, the display screen also includes: a frame support column 400, which is disposed in the frame area A2 and located between the first substrate 110 and the second substrate 120; wherein, the length of the frame support column 400 is greater than that of the detection column 330, and the length of the detection column 330 is greater than that of the deformation support column 230.

[0046] For example, the length of the detection column 330 is greater than a first preset threshold and less than a second preset threshold; wherein, the first preset threshold is the sum of 4 / 3 times the step difference and the length of the deformation support column 230, and the second preset threshold is the sum of 3 / 2 times the step difference and the length of the deformation support column 230, and the step difference is obtained based on the difference in length between the frame support column 400 and the deformation support column 230.

[0047] In some embodiments, when the border area A2 is not deformed, it is mainly supported by the border support pillar 400, so the length of the border support pillar 400 is greater than that of the detection pillar 330 and the deformation support pillar 230. By setting the length of the detection pillar 330 to be greater than that of the deformation support pillar 230, the target pressure of deformation can be detected in advance when deformation occurs, so that the magnetorheological material 240 can form a target support in time, increasing the support capacity of the deformation support pillar 230 and ensuring the display effect of the border area A2.

[0048] In some embodiments, the filling volume of the magnetorheological material 240 in the deformation support column 230 is any value between 1 / 2 and 1 / 3 of the total volume of the deformation support column 230.

[0049] For example, by setting the filling volume of magnetorheological material 240 in deformation support column 230 to be within a preset percentage threshold range, the supporting force of deformation support column 230 can be ensured, and magnetorheological material 240 can form a target support body under the action of target magnetic field. The two work together to support the deformation area. While satisfying the deformation support, the use of magnetorheological material 240 can also be reduced, thereby saving costs.

[0050] In some embodiments, if the border area A2 is divided into multiple deformation support areas, each with the same support strength, and at least one deformation detection unit 300 is provided in each deformation support area, the support strength of the border area can be adjusted in sections, thereby saving energy. Alternatively, the border area can not be divided into regions, and multiple deformation detection units 300 can be provided. The deformation detection units 300 and the deformation support structure are evenly distributed in the border area, enabling overall adjustment of the entire border area.

[0051] Figure 4 This paper illustrates a schematic diagram of another display screen provided in an embodiment of this application. Please refer to [link / reference]. Figure 2 and Figure 4As shown, the display screen also includes: a frame support column 400, which is disposed in the frame area A2 and located between the first substrate 110 and the second substrate 120; a main display support column 500 and a secondary display support column 600 are both disposed in the display area A1 and located between the first substrate 110 and the second substrate 120; wherein, the length of the deformation support column 230 is greater than that of the secondary display support column 600, the length of the main display support column 500 is greater than that of the secondary display support column 600, and the supporting force of the main display support column 500 is greater than that of the frame support column 400.

[0052] For example, the length of the deformable support column 230 is approximately 4 / 3 to 3 / 2 times that of the secondary display support column 600. When the main display support column 500 and the secondary display support column 600 are made of the same material, the support force of the deformable display support column 230 can be increased by increasing its width. The width of the frame support column 400 can be set to 1 / 2 to 2 / 3 times that of the main display support column 500. Alternatively, the main display support column 500 and the frame support column 400 can be made of different materials, so that the density of the main display support column 500 is greater than that of the frame support column 400, thereby making the support force of the main display support column 500 greater than that of the frame support column 400.

[0053] In some embodiments, by setting the length of the deformation support column 230 to be greater than that of the secondary display support column 600, the magnetorheological material 240 can be accommodated, and the supporting force of the bezel area A2 can be increased. By setting the length of the primary display support column 500 to be greater than that of the secondary display support column 600, the primary display support column 500 mainly supports the display area A1 when it is not under pressure; when the display area A1 is under pressure, the secondary display support column 600 mainly supports the display area A1. Since the area of ​​the display area A1 is larger, by setting the supporting force of the primary display support column 500 to be greater than that of the bezel support column 400, the display area A1 can be supported, and the light refraction generated by the bezel area A2 can be avoided from affecting the display area A1. It should be noted that the lengths of both the bezel support column 400 and the deformation support column 230 are less than the cell thickness of the display screen.

[0054] Figure 5 This illustration shows a top view of a splicing display device according to an embodiment of this application. Figure 6 A side view of a splicing display device provided in an embodiment of this application is shown below. Figure 5 and Figure 6 Therefore, the splicing display device includes: the aforementioned display screen and the compensation display panel B; at least two display screens are provided and spliced ​​together; the compensation display panel B is located in the splicing area of ​​adjacent display screens and covers the border area of ​​adjacent display screens.

[0055] In some embodiments, the compensation display panel B can be a light-emitting diode (LED) display panel. When the display screen is an LCD display panel, the LCD display panel adopts an ultra-narrow bezel design, so that the ultra-narrow bezel of the LCD panel covers the LED display panel, which can eliminate the splicing seam between the panels and ensure that the image can be displayed normally at the seam. When the bezel areas A2 of two displays are spliced ​​together by the compensation display panel B, the bezel area A2 of the display screen is easily squeezed by the compensation display screen, which causes the bezel area A2 of the display screen to deform, which will affect the display effect. The display screen provided in this application includes a deformation support structure, and the deformation support structure includes a deformation support... The support column 230, the first magnetic pole 210 and the second magnetic pole 220 are provided, and the magnetorheological material 240 is encapsulated inside the deformation support column 230. When the frame area A2 receives the target pressure, the target pressure is the vertical extrusion force generated by the LED display panel. By controlling the first magnetic pole 210 and the second magnetic pole 220, a target magnetic field is generated. The magnetic field direction of the target magnetic field is vertical. Under the action of the target magnetic field, the magnetorheological material 240 is arranged to form a target support body. The support direction of the target support body is vertical. It can restore the extrusion deformation and ensure the display effect of the splicing display device.

[0056] In some embodiments, the display screen is manufactured as follows: a first magnetic pole 210 is formed on a first substrate 110, a second magnetic pole 220 is formed on a second substrate 120, a cavity is formed by opening a hole in the deformation support pillar 230, a magnetorheological material 240 is filled into the cavity, and then the opening of the deformation support pillar 230 is film-formed, cured, and encapsulated. The density of the deformation support pillar 230 can specifically be 1.3~1.4 g / cm³. 3 The density of magnetorheological material 240 is controllable within the range of 1.0~3.74 g / cm³. 3 Therefore, the density of magnetorheological material 240 can be set to 2.0~3.74 g / cm³. 3 .

[0057] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A display screen having a display area and a border area located at the edge of the display area, characterized in that, The display screen includes: First substrate; The second substrate is disposed opposite to the first substrate; A deformation support structure is disposed in the frame area. The deformation support structure includes a deformation support column and a first magnetic pole and a second magnetic pole disposed opposite to each other. The first magnetic pole is formed on the first substrate, the second magnetic pole is formed on the second substrate, the deformation support column is formed on the first substrate and located between the first magnetic pole and the second magnetic pole, and the deformation support column is encapsulated with magnetorheological material. A deformation detection unit is disposed in the frame area, the deformation detection unit is electrically connected to the first magnetic pole and the second magnetic pole, and the deformation detection unit is configured to detect the target pressure on the frame area; The first and second magnetic poles are configured to generate a target magnetic field based on the target pressure on the frame region, and the magnetic particles in the magnetorheological material are configured to arrange themselves under the action of the target magnetic field to form a target support.

2. The display screen according to claim 1, characterized in that, The deformation detection unit includes: The first electrode and the second electrode are arranged opposite to each other, one of which is formed on the first substrate and arranged at a distance from the first magnetic pole, and the other is formed on the second substrate and arranged at a distance from the second magnetic pole. The probe includes a column body and a conductive layer. A first end of the column body is formed on a first electrode. The conductive layer is connected to the first electrode and wraps around a second end of the column body. The surface of the conductive layer near the second electrode is a conductive arc surface and is spaced apart from the second electrode. The conductive arc surface can contact the second electrode when the frame area is pressed, so that a current is generated between the first electrode and the second electrode. The magnitude of the current between the first electrode and the second electrode is configured to be related to the magnitude of the target pressure on the frame area.

3. The display screen according to claim 2, characterized in that, The deformation detection unit further includes: A detection circuit, connected to the first electrode and the second electrode, is configured to detect the magnitude of the current between the first electrode and the second electrode; A control circuit is connected to the detection circuit, the first magnetic pole, and the second magnetic pole. The control circuit is configured to determine the target pressure on the frame area based on the magnitude of the current detected by the detection circuit, and is also configured to control the first magnetic pole and the second magnetic pole to generate a target magnetic field based on the target pressure.

4. The display screen according to claim 2, characterized in that, The conductive layer includes at least a graphene layer, and the outer surface of the column is wrapped with the graphene layer.

5. The display screen according to claim 2, characterized in that, The display screen also includes: A frame support post is disposed in the frame area and located between the first substrate and the second substrate; wherein the length of the frame support post is greater than that of the detection post, and the length of the detection post is greater than that of the deformation support post.

6. The display screen according to claim 5, characterized in that, The length of the detection column is greater than a first preset threshold and less than a second preset threshold; wherein, the first preset threshold is the sum of 4 / 3 times the step difference and the length of the deformation support column, and the second preset threshold is the sum of 3 / 2 times the step difference and the length of the deformation support column, and the step difference is obtained based on the difference between the lengths of the frame support column and the deformation support column.

7. The display screen according to claim 1, characterized in that, The magnetorheological material filling volume in the deformation support column is any value between 1 / 2 and 1 / 3 of the total volume of the deformation support column.

8. The display screen according to claim 1, characterized in that, The display screen also includes: A frame support post is disposed in the frame area and located between the first substrate and the second substrate; The main support column and the secondary support column are both disposed in the display area and between the first substrate and the second substrate; The deformation support column is longer than the secondary display support column, the main display support column is longer than the secondary display support column, and the supporting force of the main display support column is greater than that of the frame support column.

9. A splicing display device, characterized in that, The splicing display device includes: The display screen as described in any one of claims 1-8, wherein at least two display screens are provided and are spliced ​​together; A compensation display panel is disposed in the seam area of ​​adjacent displays and covers the border area of ​​adjacent displays.

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