Display module and display device

Abstract

Embodiments of the present application relate to the display field, and particularly relate to a display module and a display device. The display module comprises: a display panel and a polarizing layer which are stacked in sequence, the display panel comprising a bending area and a non-bending area; a first optical adhesive layer located on a surface of the polarizing layer away from the display panel, the first optical adhesive layer comprising a first groove, a normal projection of the first groove on the display panel covering the bending area, and a bending-resistant material being in the first groove; and a first cover plate located on a surface of the first optical adhesive layer away from the polarizing layer, and the first cover plate having a regulating layer on a surface thereof away from the first optical adhesive layer, the regulating layer comprising a regulating material, the bending-resistant material and the first optical adhesive layer forming a boundary line, and at least part of the boundary line falling within a normal projection range of the regulating layer on the surface of the first cover plate away from the first optical adhesive layer. The embodiments of the present application are beneficial to improving the folding performance of the display module.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] AMOLED (Active Matrix Organic Light Emitting Diode) panels are widely used in display products due to their advantages such as fast response speed, higher contrast ratio, and wider viewing angle. With the continuous development of display product performance, foldable and rollable displays are gaining increasing market attention, requiring display products to have good bending resistance.

[0003] However, after long-term research, the inventors discovered that current display products have a problem where the display module malfunctions after being folded multiple times. Summary of the Invention

[0004] This application provides a display module and display device, which at least helps to improve the folding performance and display performance of the display module.

[0005] This application provides a display module, including: a display panel and a polarizing layer stacked sequentially, the display panel including a bending area and a non-bending area; a first optical adhesive layer located on the surface of the polarizing layer away from the display panel, the first optical adhesive layer including a first groove, the orthographic projection of the first groove above the display panel covering the bending area, the first groove being filled with a bending-resistant material; a first cover plate located on the surface of the first optical adhesive layer away from the polarizing layer, the first cover plate having a control layer on the surface of the first cover plate away from the first optical adhesive layer, the control layer including a control material, the bending-resistant material forming a boundary line with the first optical adhesive layer, and at least part of the orthographic projection of the boundary line on the surface of the first cover plate away from the first optical adhesive layer falling within the orthographic projection range of the control layer on the surface of the first cover plate away from the first optical adhesive layer, the control material being used to balance the display differences on both sides of the boundary line.

[0006] Furthermore, the first optical adhesive layer includes a first optical adhesive region and a second optical adhesive region, wherein the bend-resistant material is located between the first optical adhesive region and the second optical adhesive region. The control layer includes: a first control layer, wherein the orthographic projection of the boundary line between the first optical adhesive region and the bend-resistant material on the surface of the first cover plate away from the first optical adhesive layer falls within the orthographic projection range of the first control layer on the surface of the first cover plate away from the first optical adhesive layer; and a second control layer, wherein the orthographic projection of the boundary line between the second optical adhesive region and the bend-resistant material on the surface of the first cover plate away from the first optical adhesive layer falls within the orthographic projection range of the second control layer on the surface of the first cover plate away from the first optical adhesive layer. In this way, the display difference on both sides of the boundary line between the bend-resistant material and the first optical adhesive layer can be effectively reduced, thereby improving the display uniformity of the display module.

[0007] Furthermore, the surface of the first control layer away from the first optical adhesive layer is flush with the surface of the first cover plate away from the first optical adhesive layer, and the surface of the second control layer away from the first optical adhesive layer is also flush with the surface of the first cover plate away from the first optical adhesive layer. This ensures that the subsequently formed hardened layer adheres well to the first cover plate, thereby improving the mechanical properties of the first cover plate.

[0008] Furthermore, the first cover plate has a second groove, the opening of which faces away from the first optical adhesive layer. A control material is located within the second groove to form a control layer. The surface of the control layer away from the first optical adhesive layer is flush with the surface of the first cover plate away from the first optical adhesive layer. The two portions of the second groove on either side of the dividing line have different groove depths when projected onto the surface of the first optical adhesive layer. This results in different thicknesses of the control material within the second groove on either side of the dividing line, leading to different light transmittance of the control material on either side of the dividing line. This, in turn, minimizes the display differences between the display panels on either side of the dividing line.

[0009] In addition, a second cover plate is included between the polarizing layer and the first optical adhesive layer. A second optical adhesive layer is located between the second cover plate and the polarizing layer. This second optical adhesive layer includes a third optical adhesive area, a third groove, and a fourth optical adhesive area. The third groove is located between the third and fourth optical adhesive areas. The orthographic projection of the third groove onto the display panel covers the bending area, and the third groove is filled with a bending-resistant material. Compared to a single-layer cover plate, using a double-layer cover plate can improve the mechanical performance of the display module.

[0010] Additionally, it includes a support layer located on the surface of the display panel away from the polarizing layer. The support layer comprises a first support area, a fourth groove, and a second support area. The fourth groove is located between the first and second support areas. The orthographic projection of the fourth groove onto the display panel covers the bending area, and the fourth groove is filled with a bend-resistant material. This allows the bending area of ​​the support layer to maintain good bending recovery performance after multiple bends.

[0011] Furthermore, the orthographic projections of the first and fourth grooves on the first cover plate coincide. This ensures that the orthographic projections of the bending-resistant materials located in the first and fourth grooves on the surface of the first cover plate coincide, meaning that the first optical adhesive layer and the support layer have similar or identical bending resistance, which is beneficial for improving the overall bending resistance of the display module.

[0012] In addition, the flexurally resistant materials include any one of PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive. PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive themselves have high resilience and high transmittance, which gives the flexurally resistant materials good flexural resistance and maintains the display module's good display performance.

[0013] In addition, the control materials include photoresist, as well as any one of PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive. The photoresist is used to adjust the light transmittance of the control materials. By adding photoresist to PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive, the brightness of light transmitted on both sides of the interface between the first optical adhesive layer and the bending-resistant material can be adjusted, thereby improving the display differences of the display module.

[0014] Accordingly, embodiments of this application also provide a display device, including any of the above-mentioned display modules.

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

[0016] The technical solution of the display module provided in this application embodiment includes: a display panel and a polarizing layer stacked sequentially, the display panel including a bending area and a non-bending area; a first optical adhesive layer located on the surface of the polarizing layer away from the display panel, the first optical adhesive layer including: a first groove, the orthographic projection of the first groove above the display panel covering the bending area, the first groove being filled with a bending-resistant material; by segmenting the first optical adhesive layer and setting the bending-resistant material in the first optical adhesive layer, the first optical adhesive layer has better folding recovery performance, improving the folding performance of the display module, thereby improving the problem of creases appearing in the display module; a first cover plate, the first cover plate... The plate is located on the surface of the first optical adhesive layer away from the polarizing layer, and the surface of the first cover plate away from the first optical adhesive layer has a control layer. The control layer includes a control material. The bend-resistant material and the first optical adhesive layer form a boundary line, and at least part of the boundary line is projected onto the surface of the first cover plate away from the first optical adhesive layer. The projection of the boundary line onto the surface of the first cover plate away from the first optical adhesive layer falls within the projection range of the control layer onto the surface of the first cover plate away from the first optical adhesive layer. The control material is used to balance the display difference on both sides of the boundary line. In other words, the control material can adjust the display uniformity difference at the junction of the first optical adhesive layer and the bend-resistant material, so that while improving the problem of creases in the display module, the display module maintains good display function. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments, and unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a cross-sectional structural diagram of a display module provided in one embodiment of this application;

[0019] Figure 2 This is a schematic diagram of another cross-sectional structure of a display module provided in one embodiment of this application;

[0020] Figure 3This is a schematic cross-sectional view of a display module provided in an embodiment of this application.

[0021] Figure 4 This is a schematic cross-sectional view of a display module provided in one embodiment of this application;

[0022] Figure 5 This is a top view schematic diagram of a display module provided in an embodiment of this application;

[0023] Figures 6 to 8 This is a partial structural cross-sectional view of a display module provided in an embodiment of this application;

[0024] Figures 9 to 13 This is a schematic diagram of the structure corresponding to each step in the preparation method of the display module provided in another embodiment of this application. Detailed Implementation

[0025] As can be seen from the background technology, the inventors discovered through long-term research that there is currently a problem where display modules exhibit poor display quality after being folded multiple times.

[0026] This application provides a display module, including: a display panel and a polarizing layer stacked sequentially, the display panel including a bending area and a non-bending area; a first optical adhesive layer located on the surface of the polarizing layer away from the display panel, the first optical adhesive layer including a first groove, the orthographic projection of the first groove on the display panel covering the bending area, the first groove being filled with a bending-resistant material; a first cover plate located on the surface of the first optical adhesive layer away from the polarizing layer, and the surface of the first cover plate away from the first optical adhesive layer having a control layer, the control layer including a control material, the bending-resistant material forming a boundary line with the first optical adhesive layer, and at least part of the orthographic projection of the boundary line on the surface of the first cover plate away from the first optical adhesive layer falling within the orthographic projection range of the control layer on the surface of the first cover plate away from the first optical adhesive layer, the control material being used to balance the display differences on both sides of the boundary line. By segmenting the first optical adhesive layer and incorporating a bend-resistant material within it, the first optical adhesive layer exhibits superior folding recovery performance, enhancing the folding performance of the display module and thus mitigating the issue of creases in the display module. Furthermore, the control material can adjust the display uniformity differences at the interface between the first optical adhesive layer and the bend-resistant material, thereby improving the crease problem of the display module while maintaining its excellent display function.

[0027] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0028] Figure 1 This is a cross-sectional structural diagram of a display module provided in an embodiment of this application.

[0029] refer to Figure 1 The display module includes: a display panel 100 and a polarizing layer 110 stacked sequentially, the display panel 100 including a bending area and a non-bending area; a first optical adhesive layer 120 located on the surface of the polarizing layer 110 away from the display panel 100, the first optical adhesive layer 120 including a first groove 123, the orthographic projection of the first groove 123 on the display panel 100 covering the bending area, the first groove 123 being filled with a bending-resistant material; and a first cover plate 130 located on the first optical adhesive layer 120 away from the polarizing layer. The surface of layer 110 on one side, and the surface of the first cover plate 130 on the side away from the first optical adhesive layer 120, has an adjustment layer 131. The adjustment layer 131 includes an adjustment material. The bending-resistant material forms a boundary line with the first optical adhesive layer 120, and at least part of the orthographic projection of the boundary line on the surface of the first cover plate 130 on the side away from the first optical adhesive layer 120 falls within the orthographic projection range of the adjustment layer 131 on the surface of the first cover plate 130 on the side away from the first optical adhesive layer 120. The adjustment material is used to balance the display difference on both sides of the boundary line.

[0030] It is understood that the bending area of ​​the display panel 100 is the bent portion of the display panel 100 when the display module is bent, and the non-bending area of ​​the display panel 100 is the area of ​​the display panel 100 other than the bending area. In some embodiments, the display panel 100 may be an AMOLED display panel 100, and in other embodiments, the display panel 100 may also be an OLED (Organic Light-Emitting Diode) display panel 100. In this application embodiment, an AMOLED display panel 100 is used as an example for description.

[0031] The polarizing layer 110 is located on the surface of the display panel 100 and can improve the brightness and contrast of the display panel 100 to improve the display effect of the display panel 100. In some embodiments, the polarizing layer 110 may be a polarizer.

[0032] The first optical adhesive layer 120 serves as an adhesive for bonding the polarizing layer 110 and the first cover plate 130. In some embodiments, the first optical adhesive layer 120 may be an OCA (Optically Clear Adhesive) optical adhesive layer. OCA optical adhesive layers have advantages such as high light transmittance (total light transmittance > 99%), high adhesion, high weather resistance, water resistance, high temperature resistance, and UV resistance. Furthermore, OCA optical adhesive layers have uniform thickness, high flatness, and good adhesion, and are not prone to peeling even after long-term use. In other embodiments, the first optical adhesive layer 120 may also be an OCR (Optical Clear Resin) optical adhesive layer.

[0033] It is understandable that when the display module is bent, the bending area in the first optical adhesive layer 120 and the bending area of ​​the display panel 100 are projected onto the surface of the first cover plate 130. In other words, providing a first groove 123 in the first optical adhesive layer 120 corresponding to the bending area of ​​the display panel 100 effectively segments the bending and non-bending areas of the first optical adhesive layer 120. Filling the first groove 123 with a bend-resistant material provides bend resistance treatment to the bending area of ​​the first optical adhesive layer 120. After multiple bends, such as 100,000, the first optical adhesive layer 120 still exhibits good bend performance, thus improving the problem of creases appearing in the display module. It is worth noting that the flexurally resistant material referred to here means a flexurally resistant material with high resilience and high transmittance. Specifically, in some embodiments, if a flexurally resistant material can still retain more than 90% deformation after 100,000 bending tests, it is considered to have high resilience; if the transmittance of the flexurally resistant material is more than 90%, it is considered to have high transmittance. Specifically, in some embodiments, the flexurally resistant material may include any one of PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive. It is worth noting that the embodiments of this application do not limit the specific type of flexurally resistant material, as long as the flexurally resistant material can meet the requirements of high resilience and high transmittance described above.

[0034] In some embodiments, the orthographic projection of the first groove 123 onto the display panel 100 may coincide with the bending area of ​​the display panel 100, meaning the first groove 123 exactly covers the bending area of ​​the first optical adhesive layer 120, thereby improving the problem of creases appearing in the display module. In other embodiments, the orthographic projection area of ​​the first groove 123 onto the display panel 100 may be larger than the area of ​​the bending area of ​​the display panel 100, to achieve even better results.

[0035] The first cover plate 130 is made of a flexible material, thus possessing good folding properties and being suitable for flexible display devices. Specifically, in some embodiments, the first cover plate 130 can be a CPI (Colorless Polyimide) film. CPI films have advantages such as high transparency, good flexibility, and good mechanical properties, enabling the first cover plate 130 to be foldable. In other embodiments, the material of the first cover plate 130 can also be any one of UTG (Ultra Thin Glass), PET (Polythylene terephthalate) film, and PI (Polyimide) film.

[0036] In some embodiments, when the first cover plate 130 is a CPI film, the surface of the first cover plate 130 away from the first optical adhesive layer 120 also includes a hardening layer 170. This is because the CPI film has good flexibility, and by preparing the hardening layer 170 on the surface of the CPI film, the mechanical properties of the CPI film can be improved, and the scratch resistance of the CPI film can be improved.

[0037] refer to Figure 2 In some embodiments, a second cover plate 150 is further included between the polarizing layer 110 and the first optical adhesive layer 120. A second optical adhesive layer 160 is provided between the second cover plate 150 and the polarizing layer 110. The second optical adhesive layer 160 includes a third optical adhesive region 161, a third groove 163, and a fourth optical adhesive region 162. The third groove 163 is located between the third optical adhesive region 161 and the fourth optical adhesive region 162. The orthogonal projection of the third groove 163 onto the display panel 100 covers the bending area, and the third groove 163 is filled with a bending-resistant material. In other words, a double cover plate is provided on the side of the polarizing layer 110 away from the display panel 100. Compared to a single cover plate, the double cover plate results in higher surface hardness, better impact resistance, and better abrasion resistance for the display module, thereby improving the mechanical properties of the display module. Simultaneously, the second optical adhesive layer 160 is also designed in segments, with a bending-resistant material placed in the bending area of ​​the second optical adhesive layer 160. This ensures that the bending area of ​​the second optical adhesive layer 160 retains good bending recovery performance after multiple bends. In this way, while improving the mechanical properties of the display module, it maintains good bending recovery performance, mitigating the display defects caused by creases and improving the overall performance of the display module.

[0038] The display module has a non-display area and a display area. In some embodiments, an ink layer is provided on the surface of the second optical adhesive layer 160 away from the polarizing layer 110. The orthographic projection of the ink layer on the display panel 100 falls into the non-display area. The ink layer has a light-shielding effect, which can prevent problems such as diffraction, light leakage or visible wires in the non-display area of ​​the display module.

[0039] refer to Figure 3 In some embodiments, bending-resistant material may be provided only in the bending areas of the first cover plate 130 and the second cover plate 150 to improve the folding performance of the display module.

[0040] refer to Figure 4 In other embodiments, bending-resistant materials may also be provided in the bending areas of the first cover plate 130, the first optical adhesive layer 120, the second cover plate 150, and the second optical adhesive layer 160.

[0041] Continue to refer to Figure 2 The regulating material of the regulating layer 131 located on the surface of the first cover plate 130 is used to reduce the display difference on both sides of the boundary line between the bendable material and the first optical adhesive layer 120. This is because the optical adhesive material in the first optical adhesive layer 120 is different from the bendable material, resulting in differences in light transmittance. Therefore, when light emitted from the display panel 100 passes through the first optical adhesive layer 120, the brightness of the light emitted from both sides of the boundary line between the first optical adhesive layer 120 and the bendable material differs, i.e., the brightness and darkness differ. To improve the folding performance of the display module without affecting its display performance, a regulating layer 131 including the regulating material is provided on the surface of the first cover plate 130, minimizing the display difference on both sides of the boundary line between the first optical adhesive layer 120 and the bendable material, thus improving the overall display performance of the display module.

[0042] Specifically, in some embodiments, the control materials located on both sides of the boundary between the first optical adhesive layer 120 and the bendable material have different degrees of light transmittance. For example, when the light transmittance of the first optical adhesive layer 120 is better than that of the bendable material, the light transmitted through the first optical adhesive layer 120 is brighter, while the light transmitted through the bendable material is relatively darker. In this case, the light transmittance of the control material corresponding to the first optical adhesive layer 120 can be set to be worse than that of the control material corresponding to the bendable material. This can reduce the difference in brightness between the light transmitted from both sides of the boundary between the first optical adhesive layer 120 and the bendable material, thus reducing the display differences of the display module.

[0043] refer to Figure 2 as well as Figure 5In some embodiments, the first optical adhesive layer 120 includes a first optical adhesive region 121 and a second optical adhesive region 122, wherein the flexurally resistant material is located between the first optical adhesive region 121 and the second optical adhesive region 122, i.e., within the first groove 123. The control layer 131 includes: a first control layer 132, wherein the orthographic projection of the boundary line between the first optical adhesive region 121 and the flexurally resistant material on the surface of the first cover plate 130 away from the first optical adhesive layer 120 falls within the orthographic projection range of the first control layer 132 on the surface of the first cover plate 130 away from the first optical adhesive layer 120; and a second control layer 133, wherein the orthographic projection of the boundary line between the second optical adhesive region 122 and the flexurally resistant material on the surface of the first cover plate 130 away from the first optical adhesive layer 120 falls within the orthographic projection range of the second control layer 133 on the surface of the first cover plate 130 away from the first optical adhesive layer 120. In other words, control layers 131 are provided at the boundary lines of the bending-resistant material and the first optical adhesive area 121 and the boundary lines of the bending-resistant material and the second optical adhesive area 122, respectively. The orthographic projection of the first control layer 132 on the first optical adhesive layer 120 covers the boundary line of the bending-resistant material and the first optical adhesive area 121, and the orthographic projection of the second control layer 133 on the first optical adhesive layer 120 covers the boundary line of the bending-resistant material and the second optical adhesive area 122. This can significantly improve the display difference on both sides of the boundary line between the bending-resistant material and the first optical adhesive layer 120, thereby improving the display uniformity of the display module. In some embodiments, the orthographic projection of the boundary line between the first optical adhesive area 121 and the bendable material onto the surface of the first cover plate 130 away from the first optical adhesive layer 120 can fall entirely within the orthographic projection range of the first control layer 132 onto the surface of the first cover plate 130 away from the first optical adhesive layer 120, and similarly, the orthographic projection of the boundary line between the second optical adhesive area 122 and the bendable material onto the surface of the first cover plate 130 away from the first optical adhesive layer 120 can also fall entirely within the orthographic projection range of the second control layer 133 onto the surface of the first cover plate 130 away from the first optical adhesive layer 120. This further improves the display uniformity of the display module.

[0044] In some embodiments, the surface of the first control layer 132 away from the first optical adhesive layer 120 is flush with the surface of the first cover plate 130 away from the first optical adhesive layer 120, and the surface of the second control layer 133 away from the first optical adhesive layer 120 is flush with the surface of the first cover plate 130 away from the first optical adhesive layer 120. This makes the surface of the first cover plate 130 relatively flat, so that during the actual manufacturing process, when the hardening layer 170 is deposited on the surface of the first cover plate 130 away from the first optical adhesive layer 120, the hardening layer 170 adheres to the surface of the first cover plate 130 and has a uniform thickness. This helps improve the mechanical properties of the first cover plate 130 and gives the display module a flat surface, improving its appearance.

[0045] Specifically, in some embodiments, the control material includes a photoresist, and also includes any one of PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive. The photoresist is used to adjust the light transmittance of the control material. PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive have high transparency. By adding a photoresist to PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive, the transparency of PSA adhesive, thermosetting adhesive, UV adhesive, and PI adhesive can be adjusted, thereby adjusting the brightness of light transmitted on both sides of the boundary between the first optical adhesive layer 120 and the bending-resistant material. Specifically, in some embodiments, the photoresist may include a curing resin and pigments. By adding different colored pigments to the curing resin for color matching, photoresists with different color ratios are formed, thereby controlling the light transmittance of the control material, and thus adjusting the brightness on both sides of the boundary between the bending-resistant material and the first optical adhesive layer 120. For example, in some embodiments, the control materials located on both sides of the boundary between the bendable material and the first optical adhesive layer 120 may contain photoresists with different color ratios. As a result, the light transmittance of the control materials located on both sides of the boundary between the bendable material and the first optical adhesive layer 120 is different. In this way, optical compensation can be performed on the optical difference of light transmitted from both sides of the boundary between the bendable material and the first optical adhesive layer 120, thereby improving the display difference between the two sides of the boundary between the bendable material and the first optical adhesive layer 120.

[0046] refer to Figures 6 to 8In some embodiments, the first cover plate 130 has a second groove 10, the opening of which faces away from the first optical adhesive layer 120. A control material is located within the second groove 10 to form a control layer 131. The surface of the control layer 131 away from the first optical adhesive layer 120 is flush with the surface of the first cover plate 130 away from the first optical adhesive layer 120. Furthermore, the two portions of the second groove 10 whose orthographic projection onto the first optical adhesive layer 120 is located on either side of the dividing line have different groove depths. That is, the groove depth of the second groove 10 whose orthographic projection covers the optical adhesive material in the first optical adhesive layer 120 is different from the groove depth of the second groove 10 covering the bend-resistant material. It is worth noting that the groove depth referred to here is the depth of the second groove 10 in the direction from the first cover plate 130 to the first optical adhesive layer 120. It is understandable that different thicknesses of the control material result in different light transmittance. Therefore, by setting different depths of the second groove 10 on both sides of the dividing line, the thickness of the control material filled in the second groove 10 differs on both sides of the dividing line, resulting in different light transmittance of the control material on both sides of the dividing line. This reduces the display difference on both sides of the dividing line, giving the display module better display uniformity. It is worth noting that when the depths of the second groove 10 on both sides of the dividing line are different, the photoresist in the control material located in the second groove 10 can be set to have the same color ratio. That is, different light transmittance of the control material on both sides of the dividing line can be achieved by adjusting the different thicknesses of the control material on both sides of the dividing line, thus simplifying the manufacturing process.

[0047] In some embodiments, the groove depth of the second groove 10 can gradually decrease in the direction along the first optical adhesive layer 120 pointing towards the bend-resistant material. Specifically, in the cross-section along the first optical adhesive layer 120 pointing towards the bend-resistant material, the shape of the bottom of the second groove 10 can be any one of a straight line, an arc, or a stepped shape. It is worth noting that the embodiments of this application do not limit the specific shape of the bottom of the second groove 10, as long as the groove depth of the second groove 10 that orthographically covers the optical adhesive material in the first optical adhesive layer 120 is different from the groove depth of the second groove 10 that covers the bend-resistant material.

[0048] It is understood that in other embodiments, when the light transmittance of the control materials located on both sides of the boundary between the bendable material and the first optical adhesive layer 120 is different by adjusting the photoresist with different color ratios, the groove depth of the second groove 10 can also be the same in the direction from the first optical adhesive layer 120 to the bendable material.

[0049] In some embodiments, the display panel 100 further includes a support layer 140 located on the surface of the display panel 100 away from the polarizing layer 110. The support layer 140 includes a first support region 141, a fourth groove 143, and a second support region 142. The fourth groove 143 is located between the first support region 141 and the second support region 142. The orthographic projection of the fourth groove 143 onto the display panel 100 covers the bending area, and the fourth groove 143 is filled with a bending-resistant material. The support layer 140 provides support and stress buffering for the display panel 100, preventing deformation of the display panel 100 due to its flexibility in a non-bending state. The support layer 140 is designed in segments, and a bend-resistant material is applied to the bending areas of the support layer 140. This allows the bending areas of the support layer 140 to maintain good bending recovery performance after multiple bends. Simultaneously, the first support area 141 and the second support area 142 of the support layer 140 still provide support for the display panel 100, preventing deformation of the non-bending areas of the display panel 100 during bending of the display module. In this embodiment, both the first optical adhesive layer 120 and the support layer 140 are designed in segments. While maintaining the respective functions of the first optical adhesive layer 120 and the support layer 140, the bend resistance of the first optical adhesive layer 120 and the support layer 140 is improved, thereby improving the bend resistance of the display module and mitigating the display defects caused by creases in the display module.

[0050] In some embodiments, the orthographic projections of the first groove 123 and the fourth groove 143 on the first cover plate 130 coincide. That is, the orthographic projections of the bending-resistant material of the first optical adhesive layer 120 and the bending-resistant material of the support layer 140 on the first cover plate 130 coincide. The first groove 123 and the fourth groove 143 are correspondingly disposed with respect to the bending area of ​​the display panel 100. In some embodiments, the orthographic projections of the first groove 123 and the fourth groove 143 on the display panel 100 coincide with the bending area, that is, the bending-resistant material of the first optical adhesive layer 120 and the bending-resistant material of the support layer 140 exactly cover the bending area of ​​the display module, so that while improving the bending resistance of the display module, the functions of the first optical adhesive layer 120 and the support layer 140 can be maintained to the greatest extent.

[0051] In some embodiments, the support layer 140 may include a first support layer 144 and a second support layer 145 stacked sequentially in the direction away from the display panel 100. The first support layer 144 provides support for the display panel 100, supporting it and preventing deformation due to its flexibility in a non-bending state. In some embodiments, the material of the first support layer 144 may be stainless steel or the like. The second support layer 145 has good cushioning performance, absorbing stress when the display panel 100 is subjected to compression or impact. Furthermore, the second support layer 145 also has good heat dissipation, dissipating heat generated by the display module during operation. Specifically, in some embodiments, the material of the second support layer 145 may be foam.

[0052] In the display module provided in the above embodiments, the first optical adhesive layer 120 includes: a first groove 123, the orthographic projection of the first groove 123 on the display panel 100 covering the bending area, and the first groove 123 being filled with a bending-resistant material. By segmenting the first optical adhesive layer 120 and setting the bending-resistant material in the first optical adhesive layer 120, the first optical adhesive layer 120 has better folding recovery performance, improving the folding performance of the display module and thus improving the problem of creases appearing in the display module; a first cover plate 130 is located on the surface of the first optical adhesive layer 120 away from the polarizing layer 110, and the first cover plate 130 is away from the first optical adhesive layer 120. One side surface of the cover plate 130 has a control layer 131, which includes a control material. A boundary line is formed between the bend-resistant material and the first optical adhesive layer 120. At least a portion of the boundary line's orthographic projection onto the surface of the cover plate 130 away from the first optical adhesive layer 120 falls within the orthographic projection range of the control layer 131 onto the surface of the cover plate 130 away from the first optical adhesive layer 120. The control material is used to balance the display differences on both sides of the boundary line. In other words, the control material can adjust the display uniformity differences at the junction of the first optical adhesive layer 120 and the bend-resistant material, thereby improving the crease problem of the display module while maintaining its good display function. It is understood that all the orthographic projections of the boundary lines onto the surface of the cover plate 130 away from the first optical adhesive layer 120 can fall within the orthographic projection range of the control layer 131 onto the surface of the cover plate 130 away from the first optical adhesive layer 120. Specific settings can be made according to actual conditions and are not specifically limited here.

[0053] Accordingly, another embodiment of this application also provides a method for preparing a display module, which can be used to form the display module provided in the previous embodiment. The preparation method of the display module provided in another embodiment of this application will be described in detail below with reference to the accompanying drawings.

[0054] Figures 9 to 13This is a schematic diagram of the structure corresponding to each step in the preparation method of the display module provided in another embodiment of this application.

[0055] refer to Figure 9 The display panel 100 has a bending area and a non-bending area. A first support area and a second support area are formed in the non-bending area of ​​the display panel 100, and a fourth groove 143 is formed between the first support area and the second support area. The fourth groove is located in the bending area of ​​the display panel 100. Specifically, in some embodiments, the first support area and the second support area can be fixed to the display panel 100 by adhesive bonding, for example, using pressure-sensitive adhesive. In other embodiments, the first support area and the second support area can be fixed to the display panel 100 by other methods. In some embodiments, the display panel 100 and the polarizer can be bonded together by adhesive bonding.

[0056] refer to Figure 10 A second optical adhesive layer 160 and a second cover plate 150 are sequentially formed on the side of the polarizing layer 110 away from the display panel 100. The second optical adhesive layer 160 includes a third optical adhesive area 161, a third groove 163, and a fourth optical adhesive area 162. The third groove 163 is located between the third optical adhesive area 161 and the fourth optical adhesive area 162. The orthographic projection of the third groove 163 on the display panel 100 covers the bending area. The third groove 163 is filled with a bending-resistant material. Specifically, the material of the second optical adhesive layer is coated on the non-bending area of ​​the polarizing layer 110 away from the display panel 100 to form the third optical adhesive area 161 and the fourth optical adhesive area 162. The third groove 163 is formed on the surface of the display panel 100 without the material of the second optical adhesive layer. The bending-resistant material is filled in the third groove 163 to form the second optical adhesive layer 160. The second cover plate 150 is attached to the second optical adhesive layer 160.

[0057] refer to Figure 11On the side of the second cover plate 150 away from the second optical adhesive layer 160, a first optical adhesive layer 120 and a first cover plate 130 are sequentially formed. The first optical adhesive layer 120 includes a first optical adhesive area 121, a first groove 123, and a second optical adhesive area 122. The first groove 123 is located between the first optical adhesive area 121 and the second optical adhesive area 122. The orthogonal projection of the first groove 123 on the display panel 100 covers the bending area. The first groove 123 is filled with a bending-resistant material. Specifically, by means of the second cover plate 150 away from the second optical adhesive layer 160... The surface of the non-bending area on the side away from the second optical adhesive layer 160 is coated with the material of the first optical adhesive layer 120 to form the first optical adhesive area 121 and the second optical adhesive area 122. The surface of the second cover plate 150, which is not coated with the material of the first optical adhesive layer 120, forms a first groove 123. The first groove 123 is filled with a bending-resistant material to form the first optical adhesive layer 120. The first cover plate 130 is attached to the first optical adhesive layer 120, and the first cover plate 130 has a second groove 10. The opening of the second groove 10 is away from the first optical adhesive layer 120.

[0058] refer to Figure 12 In the second groove 10 on the first cover plate 130, a control material is filled to form a control layer 131. The surface of the control layer 131 away from the first optical adhesive layer 120 is flush with the surface of the first cover plate 130 away from the first optical adhesive layer 120.

[0059] refer to Figure 13 A hardened layer 170 is formed on the surface of the first cover plate 130 away from the first optical adhesive layer 120.

[0060] refer to Figure 2 The fourth groove 143 is filled with a bending-resistant material to form a support layer 140. Specifically, in some embodiments, the support layer 140 may include a first support layer 144 and a second support layer 145, which can be fixed together by adhesive.

[0061] In some other embodiments, a first support layer 144 may be formed on one side of the display panel first, and then a second optical adhesive layer 160, a second cover plate 150, a first optical adhesive layer 120, a first cover plate 130, a control layer 131, and a hardening layer 170 may be formed on the other side of the display panel before a second support layer 145 is formed on the first support layer 144.

[0062] Accordingly, this application also provides a display device, including the display module provided in the above embodiments. The display device provided in this application has the technical effects of the display module in the above embodiments. The explanations of the same or corresponding structures and terms as in the above embodiments will not be repeated here. The display device provided in this application can be any electronic product with display function, including but not limited to mobile phones, tablets, digital cameras, laptops, vehicle display terminals, and other electronic devices.

[0063] Those skilled in the art will understand that the above-described embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this application. Any person skilled in the art can make their own modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A display module, characterized by The display panel and the polarizing layer are sequentially stacked, the display panel comprises a bending area and a non-bending area; A first optical adhesive layer is located on a side surface of the polarizing layer away from the display panel, the first optical adhesive layer comprises a first groove, a projection of the first groove on the display panel covers the bending area, and the first groove is filled with a bending-resistant material; A first cover plate is located on a side surface of the first optical adhesive layer away from the polarizing layer, and a regulation layer is located on a side surface of the first cover plate away from the first optical adhesive layer, the regulation layer comprises a regulation material, the bending-resistant material and the first optical adhesive layer form a boundary line, at least part of the boundary line on the side surface of the first cover plate away from the first optical adhesive layer falls within a projection range of the regulation layer on the side surface of the first cover plate away from the first optical adhesive layer, the regulation material is used for balancing display differences on both sides of the boundary line, and the regulation material on both sides of the boundary line between the bending-resistant material and the first optical adhesive layer has different light transmission degrees. The first optical adhesive layer comprises a first optical adhesive area and a second optical adhesive area, the bending-resistant material is located between the first optical adhesive area and the second optical adhesive area, and the regulation layer comprises:

2. The display module of claim 1, wherein, A first regulation layer, a projection of an intersection line between the first optical adhesive area and the bending-resistant material on the side surface of the first cover plate away from the first optical adhesive layer falls within a projection range of the first regulation layer on the side surface of the first cover plate away from the first optical adhesive layer; A second regulation layer, a projection of an intersection line between the second optical adhesive area and the bending-resistant material on the side surface of the first cover plate away from the first optical adhesive layer falls within a projection range of the second regulation layer on the side surface of the first cover plate away from the first optical adhesive layer. The side surface of the first regulation layer away from the first optical adhesive layer is flush with the side surface of the first cover plate away from the first optical adhesive layer, and the side surface of the second regulation layer away from the first optical adhesive layer is flush with the side surface of the first cover plate away from the first optical adhesive layer.

3. The display module of claim 2, wherein, The first cover plate has a second groove, an opening of the second groove faces away from the first optical adhesive layer, the regulation material is located in the second groove to form the regulation layer, the side surface of the regulation layer away from the first optical adhesive layer is flush with the side surface of the first cover plate away from the first optical adhesive layer, and a projection on the first optical adhesive layer is located in two parts of the second groove on both sides of the boundary line, and the two parts of the second groove have different groove depths.

4. The display module of claim 1, wherein, The second cover plate is further arranged between the polarizing layer and the first optical adhesive layer, the second cover plate and the polarizing layer have a second optical adhesive layer, the second optical adhesive layer comprises a third optical adhesive area, a third groove and a fourth optical adhesive area, the third groove is located between the third optical adhesive area and the fourth optical adhesive area, a projection of the third groove on the display panel covers the bending area, and the third groove is filled with the bending-resistant material.

5. The display module of claim 1, wherein, ​ 6. The display module of claim 1, wherein, Further comprising a support layer located on a side surface of the display panel away from the polarizing layer, the support layer comprising a first support area, a fourth groove, and a second support area, the fourth groove being located between the first support area and the second support area, a normal projection of the fourth groove on the display panel covering the bending area, and the fourth groove being filled with the bending-resistant material.

7. The display module of claim 6, wherein, A normal projection of the first groove and the fourth groove on the first cover plate coincides.

8. The display module of claim 1, wherein, The bending-resistant material comprises any one of PSA glue, heat-curing glue, UV glue, and PI glue.

9. The display module of claim 1, wherein, The control material comprises a light-blocking agent, and further comprises any one of PSA glue, heat-curing glue, UV glue, and PI glue, the light-blocking agent being used to adjust the light-transmitting degree of the control material.

10. A display device, characterized by comprising: The display module comprises any one of claims 1 to 9.

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