Display module, preparation method thereof and electronic equipment

Abstract

The invention relates to a display module and a preparation method thereof and electronic equipment, the display module comprises a display screen, a backlight assembly and a middle frame, the display screen and the middle frame are stacked, the backlight assembly is arranged on the non-display side of the display screen and comprises a light guide plate and a light source, the light source is arranged on one side edge of the light guide plate, and the light guide plate is arranged on the side edge of the light guide plate in the light emitting direction of the light source. The light guide plate is provided with a plurality of light guide areas, and the target density value of the light guide points of each light guide area is determined based on the installation gap between the display screen corresponding to the light guide area and the middle frame. According to the display module, the mounting gap between the display screen and the middle frame is obtained, and the density of the light guide points on the light guide plate in the backlight assembly is adjusted according to the mounting gap, so that the light transmission amount of different light guide areas is adjusted, the display uniformity of the display screen is improved, and the display effect of the display module is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a display module and a preparation method thereof, and an electronic device. Background Art

[0002] During the production process of the screen of an electronic device, it is necessary to adjust the light guide points on the light guide plate in the screen. By adjusting the light guide points, the display panel of the electronic device can be made uniform and transparent.

[0003] Currently, before the screen is assembled, it can be adjusted to have a uniform and transparent display effect. However, after the screen is assembled in the electronic device, the screen may have uneven thickness due to uneven force, resulting in different light transmittances in different areas of the screen, resulting in display deviation (such as light leakage), affecting the user experience. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a display module and a preparation method thereof, and an electronic device.

[0005] In a first aspect of the present disclosure, a display module is provided, comprising a display screen, a backlight assembly and a middle frame, wherein the display screen and the middle frame are stacked, and the backlight assembly is arranged on a non-display side of the display screen;

[0006] The backlight assembly comprises a light guide plate and a light source, wherein the light source is arranged on one side of the light guide plate, and along the light emission direction of the light source, the light guide plate has a plurality of light guide areas;

[0007] The target density value of the light guiding points of each light guiding area is determined based on the installation gap between the display screen corresponding to the light guiding area and the middle frame.

[0008] In some embodiments, the light guiding points of each of the light guiding areas have a reference density value, and along the light emission direction of the light source, the reference density values ​​of the light guiding points of the multiple light guiding areas gradually increase, and the target density value of the light guiding points of each of the light guiding areas is determined based on the installation gap between the display screen and the middle frame corresponding to the light guiding area and the reference density value of the light guiding area.

[0009] In some embodiments, the plurality of light guide areas include a first type of light guide area, the installation gap between the display screen and the middle frame corresponding to the first type of light guide area is less than a preset threshold, and the target density value of the light guide points of the first type of light guide area is the sum of the reference density value and the compensation density value;

[0010] The compensation density value is determined based on the difference between the installation gap and the preset threshold.

[0011] In some embodiments, the plurality of light guide areas include a second type of light guide area, and the installation gap between the display screen and the middle frame corresponding to the second type of light guide area is greater than or equal to a preset threshold;

[0012] The target density value of the light guiding points in the second type light guiding area is equal to the reference density value.

[0013] In some embodiments, the preset threshold is 0.275 mm to 0.285 mm.

[0014] According to a second aspect of the present disclosure, a method for preparing a display module is provided, comprising:

[0015] Provide display screen and mid-frame;

[0016] Manufacturing a light guide plate, wherein the light guide plate has a plurality of light guide areas, and a target density value of light guide points in each light guide area is determined based on an installation gap between the display screen and the middle frame corresponding to the light guide area;

[0017] A light source is arranged on one side of the light guide plate to form a backlight module, and the backlight module, the display screen and the middle frame are assembled to obtain the display module, wherein the display screen and the middle frame are stacked and the backlight assembly is arranged on the non-display side of the display screen.

[0018] In some embodiments, the manufacturing of the light guide plate includes:

[0019] Determining a reference density value of light guiding points in the light guiding area according to a position of the light guiding area relative to the light source;

[0020] The target density value of the light guiding points in the light guiding area is determined according to the installation gap between the display screen and the middle frame corresponding to the light guiding area and the reference density value of the light guiding area.

[0021] In some embodiments, determining a reference density value of light guiding points of the light guiding area includes:

[0022] The sum of the product of the basic density value and the density parameter of the light guiding area and the basic density value is used as the reference density value of the light guiding point of the light guiding area.

[0023] In some embodiments, the light guide area where the installation gap is smaller than a preset threshold is a first type light guide area, and the method of manufacturing the light guide plate further includes:

[0024] Obtaining a compensated density value based on a basic density value and a difference between the installation gap and a preset threshold value;

[0025] The sum of the reference density value of the light guiding points of the first type of light guiding area and the compensation density value is used as the target density value of the light guiding points of the first type of light guiding area.

[0026] In some embodiments, the light guide area where the installation gap is greater than or equal to a preset threshold is a second type light guide area, and the manufacturing of the light guide plate further includes:

[0027] The reference density value of the second type light guiding area is used as the target density value of the light guiding points of the second type light guiding area.

[0028] According to a third aspect of the present disclosure, an electronic device is provided, comprising the display module as described in the first aspect, or a display module prepared by the method for preparing the display module as described in the second aspect.

[0029] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by obtaining the installation gap between the display screen and the middle frame, and adjusting the density of the light guide points on the light guide plate in the backlight assembly according to the installation gap, so as to adjust the light transmittance of different light guide areas, the display uniformity of the display screen is improved, and the display effect of the display module is improved.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 is a schematic diagram of a display module according to an exemplary embodiment.

[0033] Figure 2 is an exploded view of a display module according to an exemplary embodiment.

[0034] Figure 3 is a top view of a display module according to an exemplary embodiment.

[0035] Figure 4 The figure is a flow chart of a method for preparing a display module according to an exemplary embodiment.

[0036] Figure 5 The figure is a flow chart of a method for preparing a display module according to an exemplary embodiment.

[0037] Figure 6 The figure is a flow chart of a method for preparing a display module according to an exemplary embodiment. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] During the production process of electronic device screens, it is necessary to adjust the light guide points on the light guide plate in the screen. By adjusting the light guide points, the display panel of the electronic device can be made uniform and transparent. Currently, before the screen is assembled, the screen can be adjusted to have a uniform and transparent display effect.

[0040] However, after the screen is assembled in the electronic device, for example, there is extrusion between the screen and the middle frame of the electronic device, which causes the screen to be unevenly stressed and uneven in thickness, resulting in different light transmittances in different areas of the screen, thus causing display deviations, affecting the display effect of the screen and affecting the user experience.

[0041] In order to solve the above technical problems, this embodiment proposes a display module and a preparation method thereof, wherein the target density values ​​of the light guide points in the light guide area are determined based on the installation gap between the display screen and the middle frame corresponding to the light guide area. By obtaining the installation gap between the display screen and the middle frame, and adjusting the density of the light guide points on the light guide plate in the backlight assembly according to the installation gap, the light transmittance of different light guide areas is adjusted, thereby improving the display uniformity of the display screen and the display effect of the display module.

[0042] The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following embodiments and implementation methods can be combined with each other if there is no conflict.

[0043] According to an exemplary embodiment of the present disclosure, Figures 1 to 3 As shown, an embodiment of the present disclosure provides a display module 100, which is applied to an electronic device with a graphic display function, such as a smart phone, a tablet computer, a laptop computer, a smart wearable device, etc.

[0044] like Figures 1 to 3 As shown, the display module 100 includes a display screen, which may be a liquid crystal display (LCD for short). The principle of the liquid crystal display is that liquid crystal can present different light characteristics under the action of different voltages.

[0045] The display module 100 also includes a middle frame, which is stacked with the display screen to install and fix the display screen. The middle frame and the display screen can be connected by bonding. Figures 1 to 3 In the stacking direction of the middle frame and the display screen, there is usually an installation gap between the middle frame and the display screen. By setting the installation gap, it is possible to prevent the display screen or the middle frame from being squeezed and damaged when it is impacted. In one example, a buffer can be set at the installation gap between the display screen and the middle frame. The buffer can enhance the protection effect of the display screen. The buffer also prevents dust and impurities from entering the interior of the display screen to extend the service life of the display module 100. The buffer is, for example, foam. Foam has the advantages of elasticity, light weight, rapid pressure-sensitive fixation, easy use, easy bending, ultra-thin volume, and reliable performance.

[0046] The display module 100 also includes a backlight assembly, which is disposed on the non-display side of the display screen. The backlight assembly can provide backlight to the display screen, and when the backlight passes through the liquid crystal in the display screen, the backlight can be converted into different colors according to the different light characteristics of the liquid crystal, such as red, green, blue, and other colors formed by mixing red, green and blue, so that the display screen can display a variety of colors.

[0047] refer to Figures 1 to 3 The backlight assembly includes a light guide plate 10 and a light source 20. The light source 20 is arranged on one side of the light guide plate 10. A light guide point is arranged on the light guide plate 10. The light guide direction of the light guide point ( Figure 3 The z direction shown in the figure can be parallel to the stacking direction of the display screen and the middle frame, so as to adjust the optical path of the light emitted by the light source 20 to face the display screen. This type of backlight assembly is also called an edge-entry backlight. The display module 100 using the edge-entry backlight can be extremely thin. Therefore, the electronic device using the display module 100 provided by the embodiment of the present disclosure can achieve an extremely thin overall thickness, thereby improving the overall aesthetics of the electronic device.

[0048] It should be noted that the size of the installation gap between the display screen and the middle frame may be inconsistent. When the installation gap is too small, the buffer filled in the installation gap will squeeze the display screen, causing the thickness of the display screen to decrease. The light transmittance of the display screen with reduced thickness will increase, resulting in an excessive amount of light. In one example, when the display module 100 displays a black screen, the position of the display screen with a smaller installation gap will appear gray, white, etc., which is also called light leakage, affecting the user's viewing experience. The foam at the position with a larger installation gap will not squeeze the display screen, so the light transmittance at this position is within the normal range. From the above, it can be seen that the installation gaps at different positions between the display screen and the middle frame are different, which can easily lead to uneven display of the display screen.

[0049] refer to Figures 1 to 3In the display module 100 provided in the embodiment of the present disclosure, along the emission direction of the light source 20 ( Figure 3 The light guide plate 10 of the backlight assembly is divided into a plurality of light guide areas, and the target density value of the light guide points in each light guide area is determined based on the installation gap between the display screen corresponding to the light guide area and the middle frame. For example, when the installation gap between the display area corresponding to the light guide area and the middle frame is small, the density of the light guide points in the display area can be reduced to reduce the amount of backlight provided by the light guide area of ​​the light guide plate 10, so as to offset the increase in brightness caused by the thinning of the light guide area.

[0050] In the disclosed embodiment, the installation gap between the display screen and the middle frame is obtained, and the density of the light guide points on the light guide plate in the backlight assembly is adjusted according to the installation gap to adjust the light transmittance of different light guide areas, thereby improving the display uniformity of the display screen and the display effect of the display module.

[0051] In an exemplary embodiment, Figures 1 to 3 As shown, an embodiment of the present disclosure provides a display module 100, which includes a display screen, a backlight assembly and a middle frame. The backlight assembly includes a light guide plate 10 and a light source 20 arranged on one side of the light guide plate 10. Along the light emission direction of the light source 20, the light guide plate 10 has a plurality of light guide areas, and the target density value of the light guide point of each light guide area is determined based on the installation gap between the display screen corresponding to the light guide area and the middle frame.

[0052] In this embodiment, reference Figures 1 to 3 The light guiding points in each light guiding area have a reference density value, which may be the density value of the light guiding points in each light guiding area of ​​the light guiding plate 10 during the design stage. Before the display module 100 is assembled (or when the installation gap between the display screen and the middle frame is large enough), when the density of the light guiding points in the light guiding area is the reference density value, the backlight provided by the light guide plate 10 to the display screen can make the display screen emit light evenly.

[0053] refer to Figures 1 to 3 , along the emission direction of the light source 20 ( Figure 3 In the y direction shown in FIG. 1 , the reference density values ​​of the light guide points of the plurality of light guide regions gradually increase. In one example, the reference Figure 3, along the light emission direction of the light source 20, the light guide plate 10 can be divided into m=7 light guide areas, and along the light emission direction of the light source 20, the reference density values ​​of the light guide points of multiple light guide areas gradually increase. For example, the reference density value Y1′ of the first light guide area 11 is Y1′=1.1*Y0, and the density parameter is 1.1. The reference density value Y2′ of the second light guide area 12 is Y2′=1.2*Y0, and the density parameter is 1.2. The reference density value Y3′ of the third light guide area 13 is Y3′=1.3*Y0, and the density parameter is 1.3. The reference density value Y4′ of the fourth light guide area 14 is Y4′=1.4*Y0, and the density parameter is 1.4. The reference density value Y5′ of the fifth light guide area 15 is Y5′=1.5*Y0, and the density parameter is 1.5. The reference density value Y6′ of the sixth light guide area 16 is Y6′=1.6*Y0, and the density parameter is 1.6. The reference density value Y7′ of the seventh light guiding region 17 is 1.7*Y0, and the density parameter is 1.7.

[0054] It can be determined that, in the above example, when the mth light guide area is a first type light guide area, its density parameter a=1+0.1*m. This does not limit the technical solution of the present disclosure. In other possible implementations, the density parameter can be adaptively adjusted according to the use requirements of the display module and the number of light guide areas. For example, if the light guide plate is divided into m=14 light guide areas, the density parameter can be adaptively adjusted to a=1+0.05*m.

[0055] refer to Figures 1 to 3 , the light guiding points of each light guiding area of ​​the light guide plate have a target density value, and the target density value can be the density value of the light guiding points of each light guiding area after the light guide plate is produced and formed. Among them, the target density value of the light guiding points of each light guiding area can be determined based on the installation gap and the reference density value of the light guiding area. For example, when the installation gap x1 between the display screen and the middle frame corresponding to the first light guiding area is small, the density of the light guiding points can be adjusted based on the reference density value (Y1′=1.1*Y0) of the first light guiding area according to the size of the installation gap x1. When the installation gap x3 between the display screen and the middle frame corresponding to the third light guiding area is small, the density of the light guiding points can be adjusted based on the reference density value (Y3′=1.3*Y0) of the third light guiding area according to the size of the installation gap x3.

[0056] From the above, it can be seen that when the installation gap between the display screen and the middle frame is too small, the target density value of the light guide area corresponding to the display screen is lower than the reference density value. It can be understood that reducing the density of the light guide points of the light guide plate can reduce the backlight provided by the light guide plate to the display screen, thereby offsetting the increase in brightness caused by the reduction in the thickness of the display screen and avoiding excessive brightness in local areas on the display screen.

[0057] In one embodiment, reference Figures 1 to 3The multiple light guide areas of the light guide plate include a first type of light guide area, and the installation gap between the display screen and the middle frame corresponding to the first type of light guide area is less than a preset threshold, that is, the first type of light guide area is a light guide area that needs to be density adjusted.

[0058] In one example, the target density value of the light guiding points of the first type light guiding area may be the sum of a reference density value and a compensation density value, and the compensation density value may be determined based on a difference between the installation gap and a preset threshold.

[0059] When setting the reference density value of the light guiding points of multiple light guiding areas, the basic density value Y0 can be set as a reference. The basic density value Y0 can be the reference density value of the light guiding points of any one of the multiple light guiding areas. The basic density value is used to establish the density relationship of the light guiding points between the multiple light guiding areas.

[0060] The difference between the installation gap and the preset threshold is used as the compensation coefficient, and the compensation density value is obtained based on the product of the basic density value and the compensation coefficient. The calculation formula of the compensation density value can be:

[0061] Y 补 =Y0*(xy)

[0062] In the above formula, Y0 is the basic density value; x is the installation gap; y is the preset threshold. It can be seen from the above formula that the greater the difference between the installation gap and the preset threshold, the greater the compensation density value. The preset threshold can be determined based on the force simulation model. In one example, the preset threshold can be 0.275mm to 0.285mm. The preset threshold can be adaptively adjusted according to parameters such as the size of the display module and electronic equipment.

[0063] The calculation formula for the target density value of the light guiding points in the first type of light guiding area is as follows:

[0064] Y=Y′+Y 补 =Y′+Y0*(xy)

[0065] In the above formula, Y′, reference density value; Y 补 , compensation density value; x, installation gap; y, preset threshold value. As can be seen from the negative values ​​of xy in the above formula, the target density value of the light guide points in the first type of light guide area is less than the reference density value, that is, in the design method of the light guide plate provided in the embodiment of the present disclosure, when the density of the light guide points in the first type of light guide area with an installation gap less than the preset threshold is adjusted, the density of the light guide points in the first type of light guide area can be reduced, thereby reducing the amount of light emitted by the light source 20 passing through the first type of light guide area, thereby offsetting the increase in brightness of the first type of light guide area caused by the thinning of the thickness, so that the brightness of the first type of light guide area and other light guide areas are uniform.

[0066] Wherein, the mth light guiding area is taken as the first type of light guiding area, and the calculation formula of the target density value of the light guiding points of the first type of light guiding area is as follows:

[0067] Y m =Y′ m +Y 补 =Y0*a+Y0*(xy)

[0068] Wherein, taking the density parameter a=1+0.1*m as an example and simplifying the above formula, the calculation formula of the target density value of the light guiding point of the first type of light guiding area can be obtained as follows:

[0069] Y m =Y0*(1+0.1*m+xy)

[0070] In the above formula, Y0 is the basic density value; m is the number of the first type of light guiding area in the plurality of light guiding areas; x is the installation gap; and y is the preset threshold.

[0071] In another embodiment, reference Figures 1 to 3 , the multiple light guide areas of the light guide plate also include a second type of light guide area, and the installation gap between the display screen and the middle frame corresponding to the second type of light guide area is greater than or equal to the preset threshold. In other words, the second type of light guide area is a light guide area that does not need to be adjusted, so that the target density value of the light guide point of the second type of light guide area is equal to the reference density value. The calculation formula for the target density value of the light guide point of the second type of light guide area is as follows:

[0072] Y=Y′

[0073] In some embodiments, reference Figure 1 and Figure 2 The display module 100 may further include a reflective sheet 30 , which is disposed at the bottom of the light guide plate 10 . The reflective sheet 30 may be used to enhance the backlight intensity provided by the light guide plate 10 to the display screen.

[0074] According to an exemplary embodiment of the present disclosure, Figure 4 As shown, the embodiment of the present disclosure provides a method for preparing a display module, and the method for preparing a display module may include the following steps:

[0075] Step S100: providing a display screen and a middle frame.

[0076] In this step, the display screen may be a liquid crystal display screen, and the middle frame may be an alloy middle frame or a plastic middle frame.

[0077] In this step, the display screen and the middle frame can be preassembled, that is, the display screen and the middle frame are stacked but not bonded. In the preassembled state, the installation gap between the display screen and the middle frame can be obtained, so that the density of the light guide points on the light guide plate can be adjusted according to the installation gap during the subsequent production of the light guide plate. The installation gap can be measured by a distance sensor, a ruler, or other tool that can measure length.

[0078] Step S200: manufacturing a light guide plate, wherein the light guide plate has a plurality of light guide areas, and a target density value of light guide points in each light guide area is determined based on an installation gap between a display screen and a middle frame corresponding to the light guide area.

[0079] In this step, refer to Figures 1 to 3 , along the light emission direction of the light source 20 ( Figure 3 The light guide plate 20 can be divided into a plurality of light guide areas arranged in sequence. The number of light guide areas is not limited in this embodiment, for example, it can be 5, 6, 7, 8, etc. Moreover, the size ( Figure 3 The sizes of the multiple light guiding areas may be the same or different.

[0080] In one example, if Figures 1 to 3 As shown, each light guide area is rectangular, and the width direction of the light guide area ( Figure 3 The x direction shown in FIG) is parallel to the width direction of the display module 100 and the electronic device, and the length direction of the light guide area ( Figure 3 The y direction shown in FIG. 1 is parallel to the length direction of the display module 100 and the electronic device.

[0081] The target density value of each light guide area is determined based on the installation gap between the display screen and the middle frame corresponding to the light guide area. By adjusting the density of light guide points in multiple light guide areas, the amount of backlight provided by the light guide plate to different areas of the display screen can be adjusted to compensate for the uneven brightness of the display screen due to different thicknesses, thereby improving the display uniformity of the display screen.

[0082] Step S300, setting the light source on one side of the light guide plate to form a backlight module, assembling the backlight module, the display screen and the middle frame to obtain a display module, wherein the display screen and the middle frame are stacked, and the backlight assembly is set on the non-display side of the display screen.

[0083] In this step, the display screen and the middle frame may be stacked and bonded, and the backlight assembly may be disposed on the non-display side of the display screen to obtain a display module.

[0084] refer to Figures 1 to 3, shows a schematic diagram of a display module 100. In the assembled state, the light source 20 of the display module 100 is arranged on one side of the light guide plate 10. The light source 20 is arranged to emit light toward the light guide plate 10. That is, the light emission direction of the light source 20 is Figure 3 In the y direction shown in FIG, the top surface of the light guide plate 10 is provided with a light guide point (reference Figure 1 ), the light emitted by the light source 20 can be transmitted to the display panel (not shown in the drawings) of the display module 100 through the light guide point of the light guide plate 10, so that the display screen can display image information.

[0085] In the disclosed embodiment, the installation gap between the display screen and the middle frame is obtained, and the density of the light guide points on the light guide plate in the backlight assembly is adjusted according to the installation gap to adjust the light transmittance of different light guide areas, thereby improving the display uniformity of the display screen and the display effect of the display module.

[0086] In an exemplary embodiment, reference Figure 5 This embodiment is a further description of step S102 in the above embodiment. Step S102, making a light guide plate, may include the following steps:

[0087] Step S210: Determine a reference density value of light guiding points in the light guiding area according to the position of the light guiding area relative to the light source.

[0088] In one example, the reference density value may be determined in the following manner: the product of the basic density value and the density parameter of the light guiding area and the sum of the basic density value are used as the reference density value of the light guiding point of the light guiding area.

[0089] Step S220: Determine a target density value of light guiding points in the light guiding area according to an installation gap between the display screen and the middle frame corresponding to the light guiding area and a reference density value of the light guiding area.

[0090] refer to Figure 6 In one embodiment, when the installation gap between the display screen and the middle frame corresponding to the light guide area is less than a preset threshold, the light guide area is a first type light guide area, and the manufacturing of the light guide plate may further include the following steps:

[0091] Step S211: Obtain a compensated density value based on the basic density value and the difference between the installation gap and a preset threshold.

[0092] Step S212: The sum of the reference density value and the compensation density value of the light guiding points in the first type light guiding area is used as the target density value of the light guiding points in the first type light guiding area.

[0093] Step S211 and step S212 have been described on the device side and will not be repeated here.

[0094] In another embodiment, when the installation gap between the display screen and the middle frame corresponding to the light guide area is greater than or equal to a preset threshold, the light guide area is a second type light guide area, and manufacturing the light guide plate may further include the following steps:

[0095] Step S213: The reference density value of the second type light guiding area is used as the target density value of the light guiding points of the second type light guiding area.

[0096] Step S213 has been described on the device side and will not be repeated here.

[0097] According to an exemplary embodiment of the present disclosure, an electronic device is provided in the embodiment of the present disclosure. The electronic device includes the display module 100 provided in any of the above embodiments of the present disclosure.

[0098] In an electronic device using the display module 100 provided by the embodiment of the present disclosure, each area of ​​the display screen displays uniformly, and because the display module is an edge-type backlight, the electronic device can have a very thin body and a higher aesthetics.

[0099] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0100] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display module, characterized in that: It includes a display screen, a backlight assembly and a middle frame, wherein the display screen and the middle frame are stacked, and the backlight assembly is arranged on the non-display side of the display screen; The backlight assembly comprises a light guide plate and a light source, wherein the light source is arranged on one side of the light guide plate, and along the light emission direction of the light source, the light guide plate has a plurality of light guide areas; The target density value of the light guiding points of each light guiding area is determined based on the installation gap between the display screen corresponding to the light guiding area and the middle frame.

2. The display module according to claim 1, characterized in that: The light guiding points of each light guiding area have a reference density value. Along the light emission direction of the light source, the reference density values ​​of the light guiding points of the multiple light guiding areas gradually increase. The target density value of the light guiding points of each light guiding area is determined based on the installation gap between the display screen and the middle frame corresponding to the light guiding area and the reference density value of the light guiding area.

3. The display module according to claim 2, characterized in that: The multiple light guide areas include a first type of light guide area, the installation gap between the display screen and the middle frame corresponding to the first type of light guide area is smaller than a preset threshold, and the target density value of the light guide points of the first type of light guide area is the sum of the reference density value and the compensation density value; The compensation density value is determined based on the difference between the installation gap and the preset threshold.

4. The display module according to claim 2, characterized in that: The multiple light guide areas include a second type of light guide area, and the installation gap between the display screen and the middle frame corresponding to the second type of light guide area is greater than or equal to a preset threshold; The target density value of the light guiding points in the second type light guiding area is equal to the reference density value.

5. The display module according to claim 3 or 4, characterized in that: The preset threshold is 0.275 mm to 0.285 mm.

6. A method for preparing a display module, characterized in that: include: Provide display screen and mid-frame; Manufacturing a light guide plate, wherein the light guide plate has a plurality of light guide areas, and a target density value of light guide points in each light guide area is determined based on an installation gap between the display screen and the middle frame corresponding to the light guide area; A light source is arranged on one side of the light guide plate to form a backlight module, and the backlight module, the display screen and the middle frame are assembled to obtain the display module, wherein the display screen and the middle frame are stacked and the backlight assembly is arranged on the non-display side of the display screen.

7. The method for preparing a display module according to claim 6, characterized in that: The method of manufacturing the light guide plate comprises: Determining a reference density value of light guiding points in the light guiding area according to a position of the light guiding area relative to the light source; The target density value of the light guiding points in the light guiding area is determined according to the installation gap between the display screen and the middle frame corresponding to the light guiding area and the reference density value of the light guiding area.

8. The method for preparing a display module according to claim 7, characterized in that: Determining a reference density value of light guiding points in the light guiding area includes: The sum of the product of the basic density value and the density parameter of the light guiding area and the basic density value is used as the reference density value of the light guiding point of the light guiding area.

9. The method for preparing a display module according to claim 7 or 8, characterized in that: The light guide area where the installation gap is smaller than the preset threshold is a first type light guide area, and the manufacturing of the light guide plate further includes: Obtaining a compensated density value based on a basic density value and a difference between the installation gap and a preset threshold value; The sum of the reference density value of the light guiding points of the first type of light guiding area and the compensation density value is used as the target density value of the light guiding points of the first type of light guiding area.

10. The method for preparing a display module according to claim 7 or 8, characterized in that: The light guide area where the installation gap is greater than or equal to the preset threshold is a second type light guide area, and the manufacturing of the light guide plate also includes: The reference density value of the second type light guiding area is used as the target density value of the light guiding points of the second type light guiding area.

11. An electronic device, characterized in that: A display module comprising the display module as described in any one of claims 1 to 5, or a display module prepared by the method for preparing a display module as described in any one of claims 6 to 10.

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