Display module and display device

Abstract

An embodiment of the present application provides a display module and a display device, relating to the field of display technologies, and is used to solve the technical problem of color change at the edge of the display area of the display module. The display module of the embodiment of the present application includes a display panel, a touch layer, a polarizing layer, and a cover plate layer that are sequentially stacked; the display panel has a display area; the touch layer is connected to a touch circuit board; one end of the polarizing layer close to the touch circuit board has a color-changing part, and there is a second gap between the color-changing part and the touch circuit board; the cover plate layer has a light-transmitting window, and the orthographic projection of the light-transmitting window on the display panel covers the display area; the display module further includes an absorption layer, and the absorption layer is used to absorb the light that passes through the color-changing part and exits from the light-transmitting window. The orthographic projection of the absorption layer on the display panel is adjacent to the display area, so that the color-changing part of the polarizing layer cannot be observed by the human eye from the outside of the display module, thereby solving the technical problem of color change at the edge of the display area.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display module and a display device. Background Art

[0002] With the continuous development and progress of display technologies, consumers have increasingly higher requirements for the screen-to-body ratio of display devices (such as smartphones and tablet computers). In related technologies, the screen-to-body ratio of display devices is usually increased by reducing the width of the non-display area of the display module. However, when the width of the non-display area of the display module is reduced, the edges of the display area of the display module change color. Summary of the Invention

[0003] In view of the above problems, embodiments of this application provide a display module and a display device to solve the technical problem that the edges of the display area of the display module change color when the width of the non-display area of the display module is reduced in related technologies.

[0004] To achieve the above objective, embodiments of this application provide the following technical solutions:

[0005] In a first aspect of embodiments of this application, a display module is provided. The display module includes a display panel, a touch layer, a polarizing layer, and a cover plate layer that are stacked in sequence; the display panel has a display area; the touch layer is connected to a touch circuit board, and along a first direction, there is a first interval between the orthographic projection of the touch circuit board on the display panel and the display area; along the first direction, one end of the polarizing layer close to the touch circuit board has a color-changing part, and there is a second interval between the color-changing part and the touch circuit board; the cover plate layer has a light-transmitting window, and the orthographic projection of the light-transmitting window on the display panel covers the display area; the display module further includes an absorption layer, the absorption layer is used to absorb the light that passes through the color-changing part and exits from the light-transmitting window, and the orthographic projection of the absorption layer on the display panel is adjacent to the display area.

[0006] In the display module of embodiments of this application, an absorption layer is provided. The absorption layer is used to absorb the light that passes through the color-changing part and exits from the light-transmitting window, so that the color-changing part of the polarizing layer cannot be observed by the human eye from the outside of the display module, thereby solving the technical problem of the edge color change of the display area.

[0007] In a possible implementation manner, the orthographic projection of the absorption layer on the display panel is located within the orthographic projection of the light-transmitting window on the display panel and is adjacent to the edge of the orthographic projection of the light-transmitting window on the display panel.

[0008] In a possible implementation, along a second direction perpendicular to the first direction, the absorption layer is located between any two adjacent film layers of the display panel, the touch layer, the polarizing layer, and the cover plate layer.

[0009] In a possible implementation, the absorption layer is located between the display panel and the touch layer.

[0010] In a possible implementation, the absorption layer is located between the touch layer and the polarizing layer.

[0011] In a possible implementation, the absorption layer is located between the polarizing layer and the cover plate layer.

[0012] In a possible implementation, the display module further includes an optical adhesive layer located between the polarizing layer and the cover plate layer for bonding the polarizing layer and the cover plate layer; the absorption layer is located between the polarizing layer and the optical adhesive layer, and / or the absorption layer is located between the optical adhesive layer and the cover plate layer.

[0013] In a possible implementation, the side of the cover plate layer facing the display panel has a light-shielding layer disposed around the light-transmitting window; the absorption layer is located on the side of the cover plate layer facing the display panel and is disposed on the same layer as the light-shielding layer.

[0014] In a possible implementation, the display panel has a cathode layer; the absorption layer is located inside the display panel and on the side of the cathode layer facing the polarizing layer.

[0015] In a possible implementation, the absorption layer is a black light-absorbing layer.

[0016] In a possible implementation, the absorption band of the absorption layer is 622 - 760 nm and / or 435 - 450 nm.

[0017] In a possible implementation, along the first direction, the touch circuit board has a first width, and the light-absorbing layer has a second width greater than or equal to the first width.

[0018] In a possible implementation, along a third direction perpendicular to the first direction and with the plane where the third direction is located parallel to the display panel, the third width of the light-absorbing layer is 0.2 - 0.3 mm.

[0019] In the second aspect of the embodiments of the present application, a display device is provided, including the display module described in any one of the above.

[0020] The display device according to the embodiments of the present application includes the display module described in any one of the above, so the display device also includes the advantages of the display module described in any one of the above. The embodiments of the present application will not elaborate on this again. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a top view structural schematic diagram of the display module according to the embodiment of the present application;

[0023] Figure 2 is Figure 1 a cross-sectional view taken along the direction BB in

[0024] Figure 3 is the optical path diagram when ambient light enters Figure 2 the display module in

[0025] Figure 4 It is a cross-sectional view taken along the B-B direction of the display module in some implementation manners of the embodiment of the present application;

[0026] Figure 5 It is a cross-sectional view taken along the B-B direction of the display module in some other implementation manners of the embodiment of the present application;

[0027] Figure 6 It is a cross-sectional view taken along the B-B direction of the display module in some other implementation manners of the embodiment of the present application;

[0028] Figure 7 It is a cross-sectional view taken along the B-B direction of the display module in some other implementation manners of the embodiment of the present application;

[0029] Figure 8 It is a partial top view structural schematic diagram of the display module according to the embodiment of the present application when the optical adhesive layer and the cover plate layer are hidden;

[0030] Figure 9 It is a cross-sectional view taken along the B-B direction of the display module in some other implementation manners of the embodiment of the present application.

[0031] Description of the reference numerals:

[0032] 10. Display panel; 110. Array substrate; 120. Light-emitting layer; 130. Encapsulation layer;

[0033] 140. Driving circuit board; 20. Touch layer; 210. Touch circuit board; 30. Polarizing layer;

[0034] 40. Cover plate layer; 50. Optical adhesive layer; 60. Absorbing layer; AA. Display area;

[0035] C. Circuit connection area; D. First interval; E. Second interval; F. Color-changing part;

[0036] VA. Translucent window; H1. First width; H2. Second width; H3. Third width;

[0037] x. First direction; y. Second direction; z. Third direction. Detailed implementation mode

[0038] In the related art, a display module includes a display panel, a touch layer, a polarizing layer, and a cover plate layer that are sequentially stacked. The touch layer is connected to a touch circuit board. The polarizing layer is connected to the touch layer, and there is an interval between the polarizing layer and the touch circuit board. The cover plate layer is provided with a translucent window.

[0039] As described in the background art, there is a technical problem that when the width of the non-display area of the display module is reduced, the edge of the display area of the display module changes color. After research by the inventor, it is found that the main reason is that when the width of the non-display area of the display module is reduced, the circuit connection area of the touch layer needs to move towards the display area, thereby reducing the distance between the touch circuit board and the polarizing layer. When connecting the touch circuit board to the circuit connection area, a high-temperature press head is required to press the touch circuit board onto the circuit connection area through a conductive adhesive. Since the distance between the touch circuit board and the polarizing layer is small, the high temperature generated by the high-temperature press head will affect the part of the polarizing layer close to the touch circuit board, reducing the concentration of polyiodide ions in this part, thereby changing the absorption spectral curve of this part. When ambient light enters the display module, the ambient light is reflected by the film layer in the display panel and then exits through this part. Since the absorption spectral curve of this part has changed, the color of this part changes. Since the width of the non-display area is small, this part extends towards the display area, so that the light exiting from this part will pass through the translucent window of the cover plate layer and be observed by the human eye, thus generating the technical problem of color change at the edge of the display area.

[0040] When solving the above technical problems, the inventor tried to widen the non-display area of the display module. However, widening the non-display area of the display module is not conducive to improving the screen-to-body ratio of the display device. The inventor also tried to first connect the touch circuit board to the circuit connection area of the touch layer, and then bond the polarizing layer to the touch layer to avoid the influence of the hot press head used in the process of connecting the touch circuit board on the part of the polarizing layer close to the touch circuit board. However, after connecting the touch circuit board to the circuit connection area of the touch layer and before bonding the polarizing layer to the touch layer, it is necessary to use a cleaning roller brush to roll on the surface of the touch layer to clean the touch layer. The touch circuit board will hinder the cleaning roller brush, reducing the cleaning effect of the surface of the touch layer, leaving impurities on the surface of the touch layer, thus affecting the bonding quality between the polarizing layer and the touch layer, and further affecting the display effect of the display module.

[0041] In view of the above technical problems, the display module according to the embodiment of the present application is provided with an absorption layer. The absorption layer absorbs the light that passes through the part of the polarizing layer affected by high temperature and exits from the light transmission window, so that the part of the polarizing layer affected by high temperature cannot be observed by the human eye from the outside of the display module, thereby solving the technical problem of color change at the edge of the display area.

[0042] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] It should be noted that the sizes and shapes of the various figures in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the content of the embodiments of the present application.

[0044] Reference Figure 1 and Figure 2 , the display module according to the embodiment of the present application includes a display panel 10, a touch layer 20, a polarizing layer 30, and a cover layer 40 that are sequentially stacked.

[0045] The display panel 10 is used to display images. The display panel 10 has a display area AA and a non-display area located outside the display area AA. Exemplarily, the display panel 10 may be an Organic Light-Emitting Diode (OLED) display panel. Reference Figure 2, the OLED display panel may include an array substrate 110, a light-emitting layer 120, and a packaging layer 130 that are sequentially stacked. The array substrate 110 has a plurality of thin-film transistors arranged in a matrix. The light-emitting layer 120 is disposed on the array substrate 100 and within the display area AA. The light-emitting layer 120 has a plurality of light-emitting units arranged in a matrix. The light-emitting unit array is correspondingly disposed and electrically connected to the thin-film transistor array to control the light-emitting units through the thin-film transistors. The packaging layer 130 is disposed on the light-emitting layer 120 to package the light-emitting layer 120 and the array substrate 110 to prevent external moisture, oxygen, etc. from entering the light-emitting layer 120 and the array substrate 110 and affecting the display performance of the OLED display panel.

[0046] It can be understood that the display panel can also be other types of display panels, which will not be elaborated in the embodiments of this application.

[0047] Reference Figure 2 , a touch layer 20 is disposed on the display panel 10 to implement the touch function of the display module. The touch layer 20 is connected to a touch circuit board 210, and the touch circuit board 210 has a peripheral circuit for implementing the touch function. Exemplarily, the touch layer 20 has a circuit connection area C, and the touch circuit board 210 is connected to the circuit connection area C. Along the first direction x, there is a first interval D between the orthographic projection of the touch circuit board 210 on the display panel 10 and the display area AA.

[0048] It should be noted that the first direction refers to the x direction as shown in Figure 2 , that is, the horizontal lateral direction.

[0049] Reference Figure 2 , a polarizing layer 30 is further disposed on the touch layer 20 to reduce the ambient light reflected by the display panel 10 and improve the display effect of the display panel 10. The orthographic projection of the polarizing layer 30 on the display panel 10 covers the display area AA. There is a second interval E between the polarizing layer 30 and the touch circuit board 210. That is, as shown in Figure 2 , along the first direction x, there is a second interval E between the side of the polarizing layer 30 facing the touch circuit board 210 and the touch circuit board 21, and the polarizing layer 30 has a color-changing portion F, and the color-changing portion F is adjacent to the second interval E.

[0050] Reference Figure 2 , a cover layer 40 is located above the polarizing layer 30 to protect the polarizing layer 30, the touch layer 20, and the display panel 10. The cover layer 40 has a light-transmitting window VA. The orthographic projection of the light-transmitting window VA on the display panel 10 covers the display area AA, and the area of the orthographic projection of the light-transmitting window VA on the display panel 10 is larger than the area of the display area AA, so that the light emitted from the display area AA can be emitted through the light-transmitting window VA, enabling the human eye to observe the image displayed on the display panel 10.

[0051] Exemplarily, referring to Figure 2 , on the side of the cover plate layer 40 facing the display panel 10, there is a light-shielding layer 410. The light-shielding layer 410 is disposed around the light-transmitting window VA to absorb the light in the peripheral area of the light-transmitting window VA, prevent the problem of light leakage in the peripheral area of the light-transmitting window VA, and ensure the display effect of the display module. Exemplarily, the material of the light-shielding layer 410 can be ink.

[0052] Exemplarily, referring to Figure 2 , the display module may further include an optical adhesive layer 50. The optical adhesive layer 50 is located between the polarizer layer 30 and the cover plate layer 40 and is used to bond the polarizer layer 30 and the cover plate layer 40.

[0053] Referring to Figure 2 and Figure 3 , the display module further includes an absorption layer 60. The absorption layer 60 is used to absorb the light that passes through the color-changing part F and exits from the light-transmitting window VA, so that the human eye cannot observe the color-changing part F of the polarizer layer 30 from the outside of the display module, thereby solving the technical problem of edge color change in the display area AA. Exemplarily, the material of the absorption layer 60 can be ink, or a coherent absorption layer, or other materials that can absorb light in a specific spectral range.

[0054] In some implementation manners of the embodiments of the present application, the absorption layer 60 can be a black light-absorbing layer. The absorption layer 60 can absorb the visible light band of the light that passes through the color-changing part F and exits from the light-transmitting window VA to further prevent the human eye from observing the color-changing part F from the outside of the display module and ensure the display effect of the display module.

[0055] In some other implementation manners of the embodiments of the present application, the absorption band of the absorption layer 60 is 622 - 760 nm and / or 435 - 450 nm. The material of the polarizer layer 30 is usually an iodine-based polarizer. The polyiodide ions in the iodine-based polarizer are usually I3 - and I5 - , and the concentrations of I3 - and I5 - are different in different types of iodine-based polarizers.

[0056] When the concentration of I3 - in the iodine-based polarizer is relatively high, after being affected by high temperature, the concentration of I3 - in the color-changing part F decreases. Since I3 -If the main absorption band is the red light band, the absorption rate of the polarizing layer 30 in the color-changing part F for the light in the red light band is reduced, so that the light emitted from the color-changing part F is red. Based on this, the absorption band of the absorption layer 60 is 622-760 nm, which can partially absorb the red light passing through the color-changing part F and emitted from the light-transmitting window VA, so that the light passing through the color-changing part F and emitted from the light-transmitting window VA is white, preventing the human eye from observing the color-changing part F from the outside of the display screen, and solving the problem of edge discoloration in the display area; at the same time, it can also avoid the deviation in brightness between the light passing through the color-changing part F and emitted from the light-transmitting window VA and the light passing through other areas of the polarizing layer 30 and emitted from the light-transmitting window VA, thus avoiding the generation of dark areas at the edge of the display area.

[0057] When the concentration of I5 in the iodine-based polarizer - is relatively high, after being affected by high temperature, the concentration of I5 in the color-changing part F - decreases. Since the main absorption band of I5 - is the blue light band, the absorption rate of the color-changing part F for the light in the blue light band is reduced, so that the light emitted from the color-changing part F is blue. Based on this, the absorption band of the absorption layer 60 is 435-450 nm, which can partially absorb the blue light passing through the color-changing part F and emitted from the light-transmitting window VA, so that the light passing through the color-changing part F and emitted from the light-transmitting window VA is white, preventing the human eye from observing the color-changing part F from the outside of the display screen, and solving the problem of edge discoloration in the display area. At the same time, it can also avoid the deviation in brightness between the light passing through the color-changing part F and emitted from the light-transmitting window VA and the light passing through other areas of the polarizing layer 30 and emitted from the light-transmitting window VA, thus avoiding the generation of dark areas at the edge of the display area.

[0058] It can be understood that for other different types of iodine-based polarizers, the absorption band of the absorption layer 60 can also be other visible light bands. For example, the absorption band of the absorption layer 60 can be 390-435 nm, 450-492 nm, 492-577 nm, 577-597 nm, and / or 597-622 nm, which will not be elaborated in the embodiments of the present application.

[0059] It can be understood that for the light passing through the color-changing part F and emitted from the light-transmitting window VA, the absorption layer 60 can absorb it before the light enters the color-changing part F or after the light enters the color-changing part F. That is to say, along the second direction y, the absorption layer 60 can be located between any two adjacent film layers among the display panel 10, the touch layer 20, the polarizing layer 30, and the cover plate layer 40. The absorption layer 60 can also be located inside the display panel 10.

[0060] It should be noted that the second direction refers to as Figure 3The y-direction shown in the figure, the second direction y is perpendicular to the first direction x and the display panel 10.

[0061] Exemplarily, the absorption layer 60 may be located between the display panel 10 and the touch layer 20. Refer to Figure 4 , the absorption layer 60 may be formed on the side of the encapsulation layer 130 of the display panel 10 facing the touch layer 20, that is, the upper surface of the encapsulation layer 130. The absorption layer 60 may also be formed on the side of the touch layer 20 facing the encapsulation layer 130, that is, the lower surface of the touch layer 20.

[0062] The absorption layer 60 may also be located between the touch layer 20 and the polarizer layer 30. Refer to Figure 3 , the absorption layer 60 may be formed on the side of the touch layer 20 facing the polarizer layer 30, that is, the upper surface of the touch layer 20. The absorption layer 60 may also be formed on the side of the polarizer layer 30 facing the touch layer 20, that is, the lower surface of the polarizer layer 30.

[0063] Since the display panel 10, the touch layer 20, and the polarizer layer 30 have high strength and are not easily deformed, when the absorption layer 60 is formed on the surfaces of the display panel 10, the touch layer 20, and the polarizer layer 30, the absorption layer 60 is not easily displaced during the manufacturing process of the absorption layer 60, which can improve the position accuracy of the absorption layer 60 to avoid the absorption layer 60 from absorbing light other than the light passing through the color-changing part F and exiting from the light-transmitting window VA, thereby preventing the absorption layer 60 from causing dark areas or color changes in other parts of the display module.

[0064] The absorption layer 60 may also be disposed within the display panel 10. Exemplarily, refer to Figure 5 , the display panel 10 has a cathode layer (not shown in the drawings), and the absorption layer 60 may be located on the side of the cathode layer facing the polarizer layer 30. Since the cathode layer usually reflects ambient light within the display panel 10, disposing the absorption layer 60 on the side of the cathode layer facing the polarizer layer 30 can absorb the light that passes through the color-changing part F and exits from the light-transmitting window VA immediately after being reflected by the cathode layer, thereby preventing the color-changing part F from being observed by the human eye from the outside of the display module.

[0065] The absorption layer 60 may be located between the polarizer layer 30 and the cover plate layer 40. Exemplarily, the absorption layer 60 may be located between the polarizer layer 30 and the optical adhesive layer 50. Refer to Figure 6 , the absorption layer 60 may be located on the side of the polarizer layer 30 facing the optical adhesive layer 50, that is, the upper surface of the polarizer layer 30. Since the polarizer layer 30 has high strength and is not easily deformed, the absorption layer 60 is not easily displaced during the manufacturing process of the absorption layer 60, which can improve the position accuracy of the absorption layer 60. The absorption layer 60 may also be located on the side of the optical adhesive layer 50 facing the polarizer layer 30, that is, the lower surface of the optical adhesive layer 50.

[0066] The absorption layer 60 may also be located between the optical adhesive layer 50 and the cover plate layer 40. Exemplarily, the absorption layer 60 may be located on the side of the optical adhesive layer 50 facing the cover plate layer 40, that is, the lower surface of the optical adhesive layer 50. Refer to Figure 7 , the absorption layer 60 may be located on the side of the cover plate layer 40 facing the display panel 10, that is, the lower surface of the cover plate layer 40. Exemplarily, the absorption layer 60 may be provided on the same layer as the light-shielding layer 410 to reduce the process steps and improve the production efficiency of the display module.

[0067] Refer to Figure 8 , along the first direction x, the touch control circuit board 210 has a first width H1, and the absorption layer 60 has a second width H2, and the second width H2 is greater than or equal to the first width H1. Since the touch control circuit board 210 has the first width H1, when connecting the touch control circuit board 210 to the touch control circuit board 210 and using a high-temperature press head to press the touch control circuit board 210, to ensure the connection reliability between the touch control circuit board 210 and the touch layer 20, the width of the area in contact with the high-temperature press head in the first direction x usually needs to be greater than or equal to the first width H1 of the touch control circuit board 210, then the width of the area affected by high temperature on the polarizing layer 30 in the first direction x will be greater than or equal to the first width H1, that is, the width of the color-changing part F in the first direction will be greater than or equal to the first width H1. The second width H2 of the absorption layer 60 is greater than or equal to the first width H1 of the touch control circuit board 210, and the absorption layer 60 can absorb the light passing through the color-changing part F and exiting from the light-transmitting window VA in the first direction x, preventing light leakage and enabling people to observe the color-changing part F from the outside of the display module with the naked eye.

[0068] Exemplarily, refer to Figure 9 , the orthographic projection of the absorption layer 60 on the display panel 10 is adjacent to the side of the display area AA facing the touch control circuit board 210. That is, as Figure 9 shown, the right edge of the absorption layer 60 is aligned with the left edge of the display area AA. By setting like this, it can be avoided that the absorption layer 60 absorbs the light emitted from the display area AA, preventing the image displayed on the display panel 10 from having a dark area or color change, thereby ensuring the display effect of the display panel 10.

[0069] Exemplarily, refer to Figure 9 , the orthographic projection of the absorption layer 60 on the display panel 10 is located within the orthographic projection of the light-transmitting window VA on the display panel 10, outside the display area AA, and adjacent to the edge of the orthographic projection of the light-transmitting window VA on the display panel 10. That is, as Figure 9 shown, the left edge of the absorption layer is flush with the left edge of the light-transmitting window VA. By setting like this, the amount of the absorption layer 60 can be saved, and the cost of the display module can be reduced.

[0070] Exemplarily, refer toFigure 8 In the third direction z, the third width H3 of the light absorption layer is 0.2 to 0.3 mm. For example, it can be 0.2 mm, 0.25 mm, or 0.3 mm. The orthographic projection of the light absorption layer with a third width H3 of 0.2 to 0.3 mm on the display panel 10 can connect the orthographic projections of the display area AA and the light transmission window VA on the display panel 10, so as to prevent the light passing through the color change part F from leaking out through the gap between the display area AA and the light transmission window VA, thereby preventing the color change part from being observed by the human eye from the outside of the display module, and thus solving the problem of edge color change of the display area AA.

[0071] It should be noted that the third direction refers to the z direction as shown in Figure 8 . The third direction z is perpendicular to the first direction x, and the plane where the third direction z is located is parallel to the display panel 10.

[0072] The embodiment of the present application also provides a display device, including the above display module.

[0073] Since the display device of the embodiment of the present application includes the above display module, the display device also includes the advantages of the above display module, which will not be elaborated in the embodiment of the present application.

[0074] In the embodiments of this specification, the key points of each implementation manner are described as the differences from other embodiments. For the same or similar parts between the various implementation manners, reference can be made to each other.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that, The display module includes a display panel, a touch layer, a polarizing layer, and a cover plate layer that are sequentially stacked; the display panel has a display area; The touch layer is connected to a touch circuit board, and along a first direction, a first interval exists between the orthographic projection of the touch circuit board on the display panel and the display area; Along the first direction, one end of the polarizing layer close to the touch circuit board has a color-changing portion, and a second interval exists between the color-changing portion and the touch circuit board; The cover plate layer has a light-transmitting window, and the orthographic projection of the light-transmitting window on the display panel covers the display area; The display module further includes an absorption layer for absorbing light that passes through the color-changing portion and exits from the light-transmitting window, and the orthographic projection of the absorption layer on the display panel is adjacent to the display area; The orthographic projection of the absorption layer on the display panel is located within the orthographic projection of the light-transmitting window on the display panel and is adjacent to the edge of the orthographic projection of the light-transmitting window on the display panel.

2. The display module according to claim 1, wherein Along a second direction, the absorption layer is located between any two adjacent film layers among the display panel, the touch layer, the polarizing layer, and the cover plate layer, and the second direction is perpendicular to the first direction.

3. The display module according to claim 2, characterized in that The absorption layer is located between the display panel and the touch layer.

4. The display module according to claim 2, characterized in that, The absorption layer is located between the touch layer and the polarizing layer.

5. The display module according to claim 2, wherein The absorption layer is located between the polarizing layer and the cover plate layer.

6. The display module according to any one of claims 2-5, characterized in that, The display module further includes an optical adhesive layer located between the polarizing layer and the cover plate layer for bonding the polarizing layer and the cover plate layer; The absorption layer is located between the polarizing layer and the optical adhesive layer, and / or the absorption layer is located between the optical adhesive layer and the cover plate layer.

7. The display module according to any one of claims 2-5, characterized in that, One side of the cover plate layer facing the display panel has a light-shielding layer, and the light-shielding layer is arranged around the light-transmitting window; The absorption layer is located on one side of the cover plate layer facing the display panel and is arranged on the same layer as the light-shielding layer.

8. The display module according to claim 1, wherein The display panel has a cathode layer; the absorption layer is located inside the display panel and on the side of the cathode layer facing the polarizing layer.

9. The display module according to claim 1, wherein The absorption layer is a black light-absorbing layer.

10. The display module according to claim 1, wherein, The absorption band of the absorption layer is 622 - 760 nm and / or 435 - 450 nm.

11. The display module according to claim 1, wherein Along the first direction, the touch circuit board has a first width, and the absorption layer has a second width greater than or equal to the first width.

12. The display module according to claim 11, wherein Along a third direction, the third width of the absorption layer is 0.2 - 0.3 mm, the third direction is perpendicular to the first direction, and the plane where the third direction is located is parallel to the display panel.

13. A display device, characterized in that, Including the display module according to any one of claims 1 - 12.

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