Stress compensation method and device for display screen, display screen and electronic equipment

Abstract

The invention relates to a stress compensation method and device for a display screen, the display screen and electronic equipment, and the method comprises the steps: predicting the target stress of the display screen during bending, and outputting a target excitation signal to a target layer according to the difference between the target stress and ideal stress, and exciting the target layer to generate a target bending stress corresponding to the target excitation signal. Visibly, in the embodiment of the invention, the target layer is controlled to generate the corresponding target bending stress according to the predicted difference between the target stress and the ideal stress when the display screen is bent, so that dynamic ground stress compensation can be carried out on the display screen when the display screen is bent; the actual stress when the display screen is bent can be close to the ideal stress, so that the normal unfolding state and / or folding state of the display screen can be kept relatively stable, and the folding hand feeling experience of the electronic equipment can be kept relatively stable.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and particularly to a method and apparatus for stress compensation of a display screen, a display screen, and an electronic device. Background Art

[0002] With the development of electronic technologies, electronic devices with foldable display screens have emerged.

[0003] As users continuously use an electronic device, the number of folding times of the display screen will increase. As a result, compared with an unused electronic device, the stress during the folding of the display screen of the electronic device after being used for a period of time will change, which will affect the normal unfolded state and / or folded state of the display screen. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a method and apparatus for stress compensation of a display screen, a display screen, and an electronic device.

[0005] In a first aspect, this application provides a method for stress compensation of a display screen. The method is applied to an electronic device including a foldable display screen. The display screen includes a bendable area and a non-bendable area, and a target layer with variable bending stress is provided in the bendable area. The method includes:

[0006] Predicting the target stress when the display screen is bent;

[0007] According to the difference between the target stress and the ideal stress, outputting a target excitation signal to the target layer to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal;

[0008] Wherein, the target bending stress is used to compensate the stress of the display screen when the display screen is bent.

[0009] In a second aspect, this application further provides a display screen. The display screen includes a bendable area and a non-bendable area, and a target layer with variable bending stress is provided in the bendable area;

[0010] Wherein, the target layer is used to generate a target bending stress corresponding to an external excitation signal under the stimulation of the external excitation signal.

[0011] In a third aspect, this application further provides an electronic device, including a control component, an excitation source, and the display screen as described in the second aspect above;

[0012] Wherein, the control component is used to predict the target stress when the display screen is bent, and according to the difference between the target stress and the ideal stress, control the excitation source to output a target excitation signal to the target layer provided in the bendable area of the display screen, so as to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal;

[0013] Among them, the target bending stress is used to compensate the stress of the display screen when the display screen is bent.

[0014] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method in the first aspect are implemented.

[0015] In a fifth aspect, the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the method in the first aspect are implemented.

[0016] For the above stress compensation method, device, display screen and electronic device of the display screen, by predicting the target stress when the display screen is bent and according to the gap between the target stress and the ideal stress, a target excitation signal is output to the target layer to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal. It can be seen that in the embodiments of the present application, by controlling the target layer to generate the corresponding target bending stress according to the gap between the predicted target stress and the ideal stress when the display screen is bent, dynamic stress compensation can be achieved for the display screen when the display screen is bent, so that the actual stress when the display screen is bent can approach the ideal stress. Thus, it is not only beneficial to keep the normal unfolded state and / or folded state of the display screen relatively stable, but also beneficial to keep the folding feel experience of the electronic device relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the stacked structure of the display screen provided by the related art Figure 1 ;

[0018] Figure 2 Schematic diagram of the stacked structure of the display screen provided by the related art Figure 2 ;

[0019] Figure 3 Flow chart of the stress compensation method of the display screen in an embodiment of the present application;

[0020] Figure 4 Schematic diagram of the area of the display screen provided by the embodiment of the present application;

[0021] Figure 5 Schematic diagram of the stacked structure of the bendable area of the display screen provided by the embodiment of the present application Figure 1 ;

[0022] Figure 6 Schematic diagram of the stacked structure of the bendable area of the display screen provided by the embodiment of the present application Figure 2 ;

[0023] Figure 7Schematic flowchart of the stress compensation method for the display screen in another embodiment of the present application;

[0024] Figure 8 Schematic flowchart of the stress compensation method for the display screen in another embodiment of the present application;

[0025] Figure 9 Schematic flowchart of the stress compensation method for the display screen in another embodiment of the present application;

[0026] Figure 10 Schematic structural diagram of the stress compensation device for the display screen in an embodiment of the present application;

[0027] Figure 11 Schematic structural diagram of an electronic device in an embodiment of the present application. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] In the description of the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0030] The stress compensation method, device, display screen and electronic device provided by the embodiments of the present application can be applied to the display screen folding application scenario in an electronic device. Of course, it can also be applied to other scenarios, and the embodiments of the present application do not limit this.

[0031] The electronic device in the embodiments of the present application can be an electronic device including a foldable display screen. Exemplarily, the electronic device may include, but is not limited to: a laptop computer, a smart phone, a tablet computer.

[0032] With the continuous development of foldable electronic devices, their applications are becoming more and more widespread. Among them, the folding feel experience (or the opening and closing feel experience) of electronic devices has a very important impact on users. Usually, the folding feel experience of foldable electronic devices is mainly affected by the opening and closing torque provided by the inner cam and spring of the rotating shaft of the electronic device, as well as the stress magnitude when the display screen is bent. Considering that the opening and closing torque provided by the inner cam and spring of the rotating shaft usually does not change after the structural design is solidified, and as users continuously use the electronic device, the number of folding times of the display screen will continuously increase. During the process of folding the display screen, the stress of the display screen itself will change, which will not only affect the normal unfolded state and / or folded state of the display screen, but also cause the folding feel experience of the electronic device to change.

[0033] To solve the above technical problems in the related art, the stress compensation method, device, display screen and electronic device provided by the embodiments of the present application can dynamically compensate the stress of the display screen when the display screen is bent by controlling the target layer to generate the corresponding target bending stress according to the difference between the predicted target stress and the ideal stress of the display screen when it is bent, so that the actual stress when the display screen is bent can approach the ideal stress. Thus, it is not only beneficial to keep the normal unfolded state and / or folded state of the display screen relatively stable, but also beneficial to keep the folding feel experience of the electronic device relatively stable.

[0034] For the sake of easy understanding, different layers of the display screen in the electronic device are first introduced and illustrated exemplarily in the embodiments of the present application.

[0035] Figure 1 Schematic diagram of the laminated structure of the display screen provided by the related art Figure 1 , such as Figure 1 shown, the display screen provided by the related art may include, but is not limited to: a first protective layer 10, a display layer 11, a second protective layer 12, and a heat dissipation layer 13, which are sequentially arranged from top to bottom.

[0036] Exemplarily, the first protective layer 10 may include, but is not limited to, at least one of the following: a protective film layer, an optical adhesive layer, an ultra-thin glass layer, a first anti-impact protective layer, and a bend-resistant optical adhesive layer. The display layer 11 may include, but is not limited to: a polarizer layer and / or a display circuit layer. The second protective layer 12 may include, but is not limited to, at least one of the following: a buffer material layer, a support stainless steel layer, a second anti-impact protective layer, and a buffer foam layer. The heat dissipation layer 13 may include, but is not limited to, a copper foil layer and / or a heat dissipation graphite layer.

[0037] Of course, the display screen may also include other layers, such as a plastic film layer provided on the side of the heat dissipation layer 13 facing away from the second protective layer 12, etc.

[0038] Figure 2Schematic diagram of the laminated structure of the display screen provided by the related technology Figure 2 , such as Figure 2 shown, the display screen provided by the related technology may include but is not limited to: a protective film layer 20, a first optical adhesive layer 21, an ultra-thin glass layer 22, a second optical adhesive layer 23, a first impact protection layer 24, a bend-resistant optical adhesive layer 25, a polarizer layer 26, a display circuit layer 27, a first buffer material layer 28, a second buffer material layer 29, a support stainless steel layer 30, a second impact protection layer 31, a buffer foam layer 32, a copper foil layer 33, a heat dissipation graphite layer 34, and a plastic film layer 35, which are arranged in sequence from top to bottom.

[0039] Exemplarily, the protective film layer 20 may include, but is not limited to, polyethylene terephthalate (PET) with a thickness of 50 microns; the first optical adhesive layer 21 and the second optical adhesive layer 23 may respectively include, but are not limited to, optically clear adhesive (OCA) with a thickness of 25 microns; the ultra-thin glass layer 22 may include, but is not limited to, ultra-thin glass (UTG) with a thickness of 30 microns; the first impact-resistant protective layer 24 may include, but is not limited to, PET with a thickness of 50 microns; the bend-resistant optical adhesive layer 25 may include, but is not limited to, laminate-optically clear adhesive (Lami-OCA) with a thickness of 25 microns; the polarizer layer 26 may include, but is not limited to, a polarizer (POL) with a thickness of 46 microns, which can be used for anti-reflection; the display circuit layer 27 may include, but is not limited to, a display panel with a thickness of 35 microns; the first buffer material layer 28 may include, but is not limited to, a paint film (P-Film) with a thickness of 63 microns; the second buffer material layer 29 may include, but is not limited to, a pressure sensitive adhesive + cushion (PSA + Cushion) with a thickness of 170 microns; the support stainless steel layer 30 may include, but is not limited to, pattern SUS with a thickness of 150 microns; the second impact-resistant protective layer 31 may include, but is not limited to, thermoplastic polyurethane elastomer TPU with a thickness of 24 microns; the buffer foam layer 32 may include, but is not limited to, embossing (Embo) with a thickness of 30 microns, which can be used for anti-top printing and anti-drop color dots; the copper foil layer 33 may include, but is not limited to, copper Cu with a thickness of 75 microns, which can not only be used for heat dissipation but also has shielding and electrostatic discharge functions; the heat dissipation graphite layer 34 may include, but is not limited to, graphite with a thickness of 25 microns; the plastic film layer 35 may include, but is not limited to, PET with a thickness of 25 microns. Among them, the multi-layer materials in the display screen have a significant impact on the stress of the display screen itself. In particular, the ultra-thin glass layer 22 has the greatest impact on the stress of the display screen itself.

[0040] It should be noted that the above layers in the display screen are only exemplary descriptions. In the actual production process, different layers can be set according to different electronic devices or different requirements.

[0041] In one embodiment, Figure 3 It is a schematic flowchart of the stress compensation method for the display screen in an embodiment of the present application. In the embodiment of the present application, this method is described by taking an electronic device including a foldable display screen as an example. Figure 4 It is a schematic diagram of the area of the display screen provided by the embodiment of the present application. AsFigure 4 As shown, the display screen in the embodiment of the present application may include: a bendable area A and a non-bending area (for example, area B and area C), wherein the bendable area A may be provided with a target layer with variable bending stress, and the target layer may be used to generate a target bending stress corresponding to the external excitation signal under the stimulation of the external excitation signal.

[0042] For example, the target layer in the embodiment of the present application may include but is not limited to an electrostress layer; wherein the electrostress layer may generate different bending stresses according to the excitation state of the excitation source. It should be noted that the electrostress layer includes an electrostress material, and the stress characteristics of the electrostress material change accordingly through the excitation of the excitation source.

[0043] It should be understood that the bendable area in the embodiment of the present application can be provided with a target layer, or the target layer can be provided with multiple layers, so as to increase the size of the compensable stress.

[0044] In a possible implementation, the target layer in the embodiment of the present application can replace any layer in the existing layers of the display screen.

[0045] Figure 5 Schematic diagram of the laminated structure of the bendable area of ​​the display screen provided in the embodiment of the present application Figure 1 ,like Figure 5 As shown, the bendable area of ​​the embodiment of the present application may also include: a protective film layer 51 and an optical adhesive layer 52 located on one side of the target layer 50, and a display circuit layer 53, a buffer protection layer 54 and a heat dissipation layer 55 located on the other side of the target layer 50.

[0046] For example, the display layer 53 in the embodiment of the present application may include but is not limited to: a polarizer layer and / or a display circuit layer. The buffer protection layer 54 may include but is not limited to at least one of the following: a buffer material layer, a supporting stainless steel layer, an anti-impact protection layer, and a buffer foam layer. The protective film layer 51 in the embodiment of the present application may include but is not limited to a copper foil layer and / or a heat dissipation graphite layer.

[0047] Of course, the bendable area of ​​the embodiment of the present application may also include other layers, such as an impact-resistant protective layer and / or a bending-resistant optical adhesive layer arranged between the target layer 50 and the display circuit layer 53, and a plastic film layer arranged on the side of the heat dissipation layer 55 facing away from the buffer protective layer 54.

[0048] Figure 6 Schematic diagram of the laminated structure of the bendable area of ​​the display screen provided in the embodiment of the present application Figure 2 ,like Figure 6As shown in the figure, the bendable area of the display screen provided by the embodiments of the present application may include, but is not limited to: a protective film layer 51, a first optical adhesive layer 52, a target layer 50, a second optical adhesive layer 56, a first impact protection layer 57, a bend-resistant optical adhesive layer 58, a polarizer layer 530, a display circuit layer 531, a first buffer material layer 541, a second buffer material layer 542, a support stainless steel layer 543, a second impact protection layer 544, a buffer foam layer 545, a copper foil layer 550, a heat dissipation graphite layer 551, and a plastic film layer 59, which are arranged in sequence from top to bottom.

[0049] For the structures of other layers involved in the embodiments of the present application except the target layer, reference may be made to the relevant content in the above embodiments, which will not be elaborated here.

[0050] It should be noted that the layers in the above bendable area are only exemplary descriptions, and different layers can be set according to different electronic devices or different requirements during actual production.

[0051] It can be seen that considering that the ultra-thin glass layer in the display screen has the greatest stress impact on the display screen itself, the target layer in the embodiments of the present application can replace the ultra-thin glass layer in the display screen, which is beneficial to dynamically compensating the stress of the display screen when it is bent; of course, the target layer can also replace other stacked layers in the display screen.

[0052] In another possible implementation, the target layer in the embodiments of the present application can be added at any position of the existing stacked layers of the display screen. For example, the target layer can be arranged above the protective film layer 20 of the display screen, below the plastic film layer 35, or between any two stacked layers between the protective film layer 20 and the plastic film layer 35, etc.

[0053] It should be understood that for the convenience of manufacturing the display screen, the target layer can also be arranged in the non-bendable area. However, the stacked layer materials in the non-bendable area will not affect the stress of the display screen when it is bent. Therefore, the electronic device does not need to compensate the stress of the non-bendable area. It should be noted that Figure 4 taking the bendable area A located in the middle area of the display screen as an example, of course, the bendable area A can also be located at other positions of the display screen.

[0054] As Figure 3 shown, the method of the embodiments of the present application may include the following steps:

[0055] Step S301: Predict the target stress of the display screen when it is bent.

[0056] In this step, the electronic device can predict the target stress of the display screen when it is bent, so as to control the target layer to generate a corresponding target bending stress according to the target stress.

[0057] It should be understood that since the laminated material in the non-bending area does not affect the stress during the bending of the display screen, the target stress in the embodiments of the present application may include, but is not limited to, the stress in the bendable area of the display screen during bending.

[0058] In a possible implementation, the electronic device may predict the target stress of the display screen during bending at preset time intervals, where the preset time intervals may include, but are not limited to: one day, one week, or one month.

[0059] In another possible implementation, when the electronic device predicts that the user is about to perform a folding operation on the electronic device, it may predict the target stress of the display screen during bending. Of course, the electronic device may also predict the target stress of the display screen during bending in other cases.

[0060] Step S302: Output a target excitation signal to the target layer according to the gap between the target stress and the ideal stress, so as to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal; where the target bending stress is used to perform stress compensation on the display screen when the display screen is bent.

[0061] Exemplarily, the ideal stress in the embodiments of the present application may be the standard stress preset when the electronic device leaves the factory, or may be the standard stress obtained when the electronic device updates the system during use; of course, it may also be the stress obtained by the electronic device through other means.

[0062] In this step, the electronic device may output a target excitation signal to the target layer according to the gap between the predicted target stress and the ideal stress of the display screen during bending, so as to stimulate the target layer to generate a target bending stress corresponding to the gap between the target stress and the ideal stress, so that the target bending stress can dynamically compensate the stress of the bendable area of the display screen when the display screen is bent, so that the actual stress when the display screen is bent can be close to the ideal stress, which is not only beneficial to keeping the normal unfolded state and / or folded state of the display screen relatively stable, but also beneficial to keeping the folding feel experience of the electronic device relatively stable.

[0063] Exemplarily, if the target stress is less than the ideal stress, the electronic device may perform the step of outputting a target excitation signal to the target layer, so as to realize sensitive dynamic compensation of the stress of the bendable area of the display screen. Another exemplarily, if the target stress is less than the ideal stress and the gap between the target stress and the ideal stress is greater than the preset gap threshold, the electronic device may perform the step of outputting a target excitation signal to the target layer, so as to further save stress compensation resources on the basis of realizing dynamic compensation of the stress of the bendable area of the display screen.

[0064] In one possible implementation, the control component in the electronic device can output a target excitation signal to the target layer according to the difference between the target stress and the ideal stress. In another possible implementation, the control component in the electronic device can control the excitation source in the electronic device to output a target excitation signal to the target layer according to the difference between the target stress and the ideal stress. Wherein, the excitation source may include, but is not limited to, a voltage excitation source or a current excitation source.

[0065] Exemplarily, the bendable area A in the embodiment of the present application may be provided with an independent excitation source, so that the control component can control the excitation source to perform electro-excitation on the target layer in the bendable area A, so that the target layer generates a specific material bending stress.

[0066] It should be understood that the bendable area A in the embodiment of the present application may include a plurality of target layers arranged in a stacked manner, so that the electronic device can control one or more of the plurality of target layers to generate corresponding bending stresses, thereby improving the compensable bending stress.

[0067] Exemplarily, the electronic device can output a target excitation signal to one or more of the plurality of target layers to stimulate one or more of them to generate a target bending stress corresponding to the target excitation signal.

[0068] Of course, the electronic device can also output a target excitation signal to the target layer in other ways according to the difference between the target stress and the ideal stress.

[0069] It should be noted that the target stress involved in the embodiment of the present application may include, but is not limited to, a target rebound force, and the ideal stress may include, but is not limited to, an ideal rebound force. Correspondingly, the target bending stress in the embodiment of the present application can be used to compensate the rebound force of the display screen when the display screen is bent.

[0070] Of course, according to the different application scenarios of the display screen, any stress involved in the embodiment of the present application may also include other forms of acting forces other than the rebound force, and the present embodiment will not elaborate on this one by one.

[0071] In summary, in the embodiments of the present application, by predicting the target stress when the display screen is bent and, based on the difference between the target stress and the ideal stress, outputting a target excitation signal to the target layer to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal. It can be seen that in the embodiments of the present application, by controlling the target layer to generate the corresponding target bending stress according to the difference between the predicted target stress and the ideal stress when the display screen is bent, dynamic stress compensation can be achieved for the display screen when it is bent, so that the actual stress when the display screen is bent can approach the ideal stress. This is not only conducive to maintaining the relative stability of the normal unfolded state and / or folded state of the display screen, but also conducive to maintaining the relative stability of the folding feel experience of the electronic device.

[0072] In one embodiment, Figure 7 FIG. is a schematic flowchart of a stress compensation method for a display screen in another embodiment of the present application. On the basis of the above embodiment, a possible implementation manner of "outputting a target excitation signal to the target layer according to the difference between the target stress and the ideal stress" in step S302 above is introduced and illustrated by way of example. As Figure 7 shown, the method of the embodiment of the present application may include the following steps:

[0073] Step S3021: Determine target signal parameters according to the difference between the target stress and the ideal stress.

[0074] In this step, the electronic device may query the correspondence between the preset difference range and the corresponding signal parameters according to the difference between the target stress and the ideal stress, and determine the target signal parameters corresponding to the target difference range to which the difference between the target stress and the ideal stress belongs. Among them, the correspondence between the preset difference range and the corresponding signal parameters can be used to indicate the signal parameters corresponding to different difference ranges. Exemplarily, the target signal parameters in the embodiments of the present application are the signal parameters corresponding to the target excitation signal, where the target signal parameters may include at least one of voltage parameters and current parameters.

[0075] Step S3022: Generate and output a target excitation signal to the target layer according to the target signal parameters.

[0076] In this step, the electronic device may generate a target excitation signal corresponding to the target signal parameters according to the target signal parameters, and output the target excitation signal to the target layer to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal, so that the target bending stress can dynamically compensate the stress of the bendable area of the display screen when the display screen is bent, so that the actual stress when the display screen is bent can reach the ideal stress.

[0077] In a possible implementation, the control component in the electronic device can generate a target excitation signal corresponding to the target signal parameter according to the target signal parameter, and output the target excitation signal to the target layer.

[0078] In another possible implementation, the control component in the electronic device can control the excitation source in the electronic device to generate a target excitation signal corresponding to the target signal parameter according to the target signal parameter, and output the target excitation signal to the target layer. Exemplarily, the control component can send the target signal parameter to the excitation source, so that the excitation source can generate a target excitation signal corresponding to the target signal parameter according to the target signal parameter, and output the target excitation signal to the target layer.

[0079] Of course, the electronic device can also generate and output the target excitation signal to the target layer in other ways according to the target signal parameter.

[0080] In summary, in the embodiments of the present application, by generating and outputting the target excitation signal according to the target signal parameter determined by the gap between the target stress and the ideal stress, the accurate target excitation signal can be output to the target layer, so as to stimulate the target layer to generate the accurate target bending stress corresponding to the gap between the target stress and the ideal stress, so that when the display screen is bent, the target bending stress can accurately dynamically compensate the stress of the bendable area of the display screen, so that the actual stress when the display screen is bent can reach the ideal stress, which is beneficial to improving the stress compensation efficiency of the display screen.

[0081] In one embodiment, on the basis of the above embodiment, a possible implementation of "predicting the target stress of the display screen when bent" in step S301 in the embodiments of the present application is introduced and illustrated exemplarily.

[0082] In a possible implementation, the electronic device can predict the target stress of the display screen when bent according to the historical stress of the display screen detected by the detection device in the electronic device. Among them, the detection device can include but is not limited to a stress detection sensor or a stress detection circuit unit. Exemplarily, the electronic device can predict the target stress of the display screen when bent according to the historical stress and a preset stress prediction model, where the preset stress prediction model can be used to indicate the predicted stress corresponding to different historical stresses.

[0083] It can be seen that in this implementation, by predicting the target stress of the display screen when bent through the detection device in the electronic device, the target stress can be predicted conveniently and accurately, which is beneficial to improving the stress compensation efficiency of the display screen.

[0084] In one embodiment, Figure 8This is a schematic flowchart of the stress compensation method for the display screen in another embodiment of the present application. Based on the above embodiment, another possible implementation manner of "predicting the target stress of the display screen during bending" in step S301 is exemplarily introduced and described. As Figure 8 shown, the method of the embodiment of the present application may include the following steps:

[0085] Step S601: Obtain the target usage information of the display screen.

[0086] In this step, the electronic device may obtain the target usage information of the display screen for a historical preset duration. For example, the historical preset duration may be one day in history, one week in history, one month in history, one year in history, or the historical duration since the electronic device left the factory. Exemplarily, the target usage information in the embodiment of the present application may include, but is not limited to, at least one of the following information: the number of bends, the unfolding duration, the bending duration, and the ambient temperature. Among them, the unfolding duration may be the duration when the display screen is in the unfolded state; the bending duration may be the duration when the display screen is in the bent state; the ambient temperature may be the ambient temperature of the electronic device when the display screen is bent.

[0087] Step S602: Predict the target stress of the display screen during bending according to the target usage information.

[0088] In this step, the electronic device may predict the target stress of the display screen during bending according to the target usage information, so as to control the target layer to generate a corresponding target bending stress according to the target stress.

[0089] In a possible implementation manner, the electronic device may query the corresponding relationship between the preset usage information and the stress according to the target usage information, and determine the target stress corresponding to the target usage information, where the corresponding relationship between the preset usage information and the stress may be used to indicate the corresponding relationship between different usage information and the corresponding stress.

[0090] In another possible implementation manner, the electronic device may predict the target stress according to the target usage information and the preset stress model, where the preset stress model may be used to indicate the stress corresponding to different usage information. The preset stress model in the embodiment of the present application may be a big data model of the change amount of the stress of the display screen with parameters such as the number of bends, the unfolding duration, the bending duration, and / or the ambient temperature.

[0091] In this implementation manner, the electronic device can obtain the target stress output by the preset stress model by inputting the target usage information into the preset stress model. It can be seen that in this implementation manner, by predicting the target stress according to the target usage information and the preset stress model, the target stress can be predicted conveniently and quickly, which is beneficial to improving the stress compensation efficiency of the display screen.

[0092] It should be noted that the preset stress model in the embodiments of the present application can be the stress model preset when the electronic device leaves the factory, or can be the stress model obtained when the electronic device updates the system during use; of course, it can also be the stress model obtained by the electronic device through other means.

[0093] In summary, in the embodiments of the present application, by predicting the target stress of the display screen when it is bent according to the obtained target usage information, various usage parameters can be comprehensively considered to accurately predict the target stress, so that the target bending stress can be accurately controlled to generate the corresponding target bending stress on the target layer, so that the target bending stress can accurately dynamically compensate the stress in the bendable area of the display screen when the display screen is bent, so that the actual stress when the display screen is bent can reach the ideal stress, which is beneficial to improving the stress compensation efficiency of the display screen.

[0094] In one embodiment, Figure 9 It is a schematic flowchart of the stress compensation method for the display screen in another embodiment of the present application. On the basis of the above embodiments, the overall process of the stress compensation method for the display screen in the embodiments of the present application is introduced and described. As Figure 9 shown, the method of the embodiments of the present application may include the following steps:

[0095] 1) Obtain target usage information such as the number of bends, unfolding duration, bending duration, and ambient temperature of the display screen.

[0096] 2) According to the target usage information such as the number of bends, unfolding duration, bending duration, and ambient temperature of the display screen and the preset stress model, perform stress prediction to obtain the target stress.

[0097] 3) Perform stress compensation according to the target stress.

[0098] Exemplarily, according to the gap between the target stress and the ideal stress, output a target excitation signal to the target layer to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal.

[0099] In summary, in the embodiments of the present application, by providing a target layer with variable bending stress in the bendable area of the display screen and controlling the target layer to generate the corresponding target bending stress according to the change of the predicted target stress when the display screen is bent, the target bending stress can dynamically compensate the stress in the bendable area of the display screen when the display screen is bent, so that the actual stress when the display screen is bent can approach the ideal stress, which is beneficial to keeping the folding feel experience of the electronic device relatively stable.

[0100] It should be understood that although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0101] Based on the same inventive concept, an embodiment of the present application also provides a stress compensation device for implementing the stress compensation method of the display screen involved above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the stress compensation device of the display screen provided below can refer to the limitations on the stress compensation method of the display screen in the above text, and will not be repeated here.

[0102] In one embodiment, Figure 10 is a schematic structural diagram of a stress compensation device for a display screen in an embodiment of the present application. The stress compensation device for a display screen provided by the embodiment of the present application can be applied to an electronic device including a foldable display screen. The display screen includes: a bendable area and a non-bendable area. The bendable area is provided with a target layer with variable bending stress. As Figure 10 shown, the stress compensation device of the embodiment of the present application may include: a prediction module 1001 and an excitation module 1002.

[0103] Among them, the prediction module 1001 is used to predict the target stress when the display screen is bent; the excitation module 1002 is used to output a target excitation signal to the target layer according to the difference between the target stress and the ideal stress, so as to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal; wherein, the target bending stress is used to compensate the stress of the display screen when the display screen is bent.

[0104] In one embodiment, the excitation module 1002 is specifically used for: if the target stress is less than the ideal stress, and the difference between the target stress and the ideal stress is greater than a preset difference threshold, then execute the step of outputting a target excitation signal to the target layer.

[0105] In one embodiment, the excitation module 1002 includes:

[0106] a determination unit, configured to determine target signal parameters according to the difference between the target stress and the ideal stress, where the target signal parameters include at least one of a voltage parameter and a current parameter;

[0107] An excitation unit, configured to generate and output a target excitation signal to a target layer according to target signal parameters.

[0108] In one embodiment, the prediction module 1001 includes:

[0109] An acquisition unit, configured to acquire target usage information of a display screen;

[0110] A prediction unit, configured to predict a target stress of the display screen when bent according to the target usage information.

[0111] In one embodiment, the target usage information includes at least one of the following information: the number of bends, the unfolding duration, the bending duration, and the ambient temperature.

[0112] In one embodiment, the prediction unit is specifically configured to: predict the target stress according to the target usage information and a preset stress model, where the preset stress model is used to indicate the stress corresponding to different usage information.

[0113] In one embodiment, the target stress is a target rebound force, and the ideal stress is an ideal rebound force. Correspondingly, the target bending stress is used to compensate the rebound force of the display screen when the display screen is bent.

[0114] The stress compensation device for a display screen provided in an embodiment of the present application can be used to execute the technical solutions in the above-mentioned embodiment of the stress compensation method for a display screen of the present application. The implementation principle and technical effects are similar and will not be described in detail here.

[0115] Each module in the above-mentioned stress compensation device for a display screen can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in or independent of a processor in an electronic device in the form of hardware, or stored in a memory in the electronic device in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0116] In one embodiment, the present application further provides a display screen, which may include: a bendable area and a non-bendable area, and a target layer with variable bending stress is provided in the bendable area; wherein, the target layer is configured to generate a target bending stress corresponding to an external excitation signal under the excitation of the external excitation signal.

[0117] In one embodiment, the target layer is an electrostrictive stress layer; the bendable area includes a plurality of target layers arranged in a stacked manner.

[0118] In one embodiment, the bendable area further includes: a protective film layer and an optical adhesive layer on one side of the target layer, and a display circuit layer, a buffer protection layer, and a heat dissipation layer on the other side of the target layer.

[0119] For the relevant content of the display screen provided in the embodiments of the present application, reference may be made to the relevant content in the embodiments of the stress compensation method of the display screen in the present application above. The implementation principles and technical effects are similar and will not be elaborated here.

[0120] In one embodiment, Figure 11 is a schematic structural diagram of an electronic device in an embodiment of the present application. As Figure 11 shown, the electronic device in the embodiment of the present application may include: a control component 1101, an excitation source 1102, and a display screen 1103.

[0121] Among them, the control component 1101 is used to predict the target stress of the display screen when bent, and according to the gap between the target stress and the ideal stress, control the excitation source 1102 to output a target excitation signal to the target layer provided in the bendable area of the display screen, so as to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal; the target bending stress is used to perform stress compensation on the display screen when the display screen is bent.

[0122] In one embodiment, the control component 1101 is specifically used for: if the target stress is less than the ideal stress and the gap between the target stress and the ideal stress is greater than a preset gap threshold, then execute the step of controlling the excitation source 1102 to output a target excitation signal to the target layer.

[0123] In one embodiment, the control component 1101 is specifically used for: determining target signal parameters according to the gap between the target stress and the ideal stress, where the target signal parameters include at least one of voltage parameters and current parameters; controlling the excitation source 1102 to generate and output a target excitation signal according to the target signal parameters.

[0124] In one embodiment, the control component 1101 is specifically used for: obtaining the target usage information of the display screen; predicting the target stress of the display screen when bent according to the target usage information.

[0125] In one embodiment, the target usage information includes at least one of the following information: the number of bends, the unfolding duration, the bending duration, and the ambient temperature.

[0126] In one embodiment, the control component 1101 is specifically used for: predicting the target stress according to the target usage information and a preset stress model, where the preset stress model is used to indicate the stress corresponding to different usage information.

[0127] The electronic device provided in the embodiments of the present application can be used to execute the technical solutions in the embodiments of the stress compensation method of the display screen in the present application above. The implementation principles and technical effects are similar and will not be elaborated here.

[0128] In one embodiment, the embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the technical solutions in the above embodiments of the stress compensation method for the display screen of the present application are implemented. The implementation principle and technical effects are similar and will not be elaborated here.

[0129] In one embodiment, the embodiment of the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, the technical solutions in the above embodiments of the stress compensation method for the display screen of the present application are implemented. The implementation principle and technical effects are similar and will not be elaborated here.

[0130] Those of ordinary skill in the art can understand that all or part of the processes in the above embodiments of the method can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above embodiments of the respective methods. Among them, any reference to a memory or other medium used in the various embodiments provided by the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The processors involved in the various embodiments provided by the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0131] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0132] The above embodiments only represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A stress compensation method for a display screen, characterized in that The method is applied to an electronic device including a foldable display screen, wherein the display screen includes: a bendable area and a non-bending area, wherein the bendable area is provided with a target layer with variable bending stress; the method includes: Predicting a target stress of the display screen when it is bent; Outputting a target excitation signal to the target layer according to the difference between the target stress and the ideal stress, so as to excite the target layer to generate a target bending stress corresponding to the target excitation signal; The target bending stress is used to perform stress compensation on the display screen when the display screen is bent.

2. The method according to claim 1, characterized in that Outputting a target excitation signal to the target layer according to the gap between the target stress and the ideal stress includes: If the target stress is less than the ideal stress, and the difference between the target stress and the ideal stress is greater than a preset difference threshold, the step of outputting a target excitation signal to the target layer is performed.

3. The method according to claim 1, characterized in that, The target layer is an electro-stress layer, and outputting a target excitation signal to the target layer according to a gap between the target stress and the ideal stress includes: Determining a target signal parameter according to a gap between the target stress and the ideal stress, wherein the target signal parameter includes at least one of a voltage parameter and a current parameter; The target excitation signal is generated according to the target signal parameter and output to the target layer.

4. The method according to any one of claims 1 to 3, characterized in that, The predicting a target stress of the display screen when being bent includes: Acquiring target usage information of the display screen; The target stress of the display screen when being bent is predicted according to the target usage information.

5. The method according to claim 4, characterized in that, The target usage information includes at least one of the following information: number of bends, unfolding time, bending time and ambient temperature.

6. The method according to claim 4, wherein The predicting the target stress of the display screen when it is bent according to the target usage information includes: The target stress is predicted according to the target usage information and a preset stress model, wherein the preset stress model is used to indicate stresses corresponding to different usage information.

7. The method according to any one of claims 1-3, characterized in that The target stress is a target rebound force, and the ideal stress is an ideal rebound force. Correspondingly, the target bending stress is used to compensate for the rebound force of the display screen when the display screen is bent.

8. A display screen, characterized in that, The display screen comprises: a bendable region and a non-bending region, wherein the bendable region is provided with a target layer with variable bending stress; Wherein, the target layer is used to generate a target bending stress corresponding to the external excitation signal under the excitation of the external excitation signal.

9. The display screen according to claim 8, characterized in that, The target layer is an electrostressed layer; the bendable region includes a plurality of stacked target layers.

10. The display screen according to claim 8 or 9, characterized in that, The bendable region further includes: a protective film layer and an optical adhesive layer located on one side of the target layer, and a display circuit layer, a buffer protection layer and a heat dissipation layer located on the other side of the target layer.

11. An electronic device, characterized in that, comprising a control component, an excitation source and a display screen as claimed in any one of claims 8 to 10; Wherein, the control component is used to predict the target stress of the display screen when it is bent, and control the excitation source to output a target excitation signal to the target layer arranged in the bendable area of the display screen according to the gap between the target stress and the ideal stress, so as to stimulate the target layer to generate a target bending stress corresponding to the target excitation signal; Wherein, the target bending stress is used to perform stress compensation on the display screen when the display screen is bent.

12. The electronic device according to claim 11, wherein Specifically, the control component is configured to: if the target stress is less than the ideal stress, and the gap between the target stress and the ideal stress is greater than a preset gap threshold, then execute the step of controlling the excitation source to output a target excitation signal to the target layer.

13. The electronic device according to claim 11, wherein Specifically, the control component is configured to: Determine target signal parameters according to the gap between the target stress and the ideal stress, where the target signal parameters include at least one of voltage parameters and current parameters; Control the excitation source to generate and output the target excitation signal to the target layer according to the target signal parameters.

14. The electronic device according to any one of claims 11-13, characterized in that, Specifically, the control component is configured to: Obtain the target usage information of the display screen; Predict the target stress of the display screen when it is bent according to the target usage information.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, the steps of the method according to any one of claims 1-7 are implemented.

16. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, the steps of the method according to any one of claims 1-7 are implemented.

Images