Display module and display device

Abstract

The present invention discloses a display module and a display device, and relates to the field of display technology. The display module includes a first display panel and a second display panel arranged opposite to each other, the first display panel is located on a side of the second display panel close to a light-emitting surface of the display module; and also includes a light adjustment layer located between the second display panel and the first display panel, the light adjustment layer includes a plurality of dimming units, the dimming unit includes a curved portion recessed toward the inside of the light adjustment layer, the curved portion forms a microstructure concave lens, the second display panel includes a first black matrix, the first black matrix includes a first sub-black matrix extending along a first direction and a second sub-black matrix extending along a second direction, the first direction intersects with the second direction, and in a direction perpendicular to the light-emitting surface of the display module, the curved portion overlaps at least partially with an edge of the first sub-black matrix, and / or the curved portion overlaps at least partially with an edge of the second sub-black matrix. The present invention can improve the moiré pattern of a dual-screen display module.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more specifically, to a display module and a display device. Background Art

[0002] With the development of electronic technology, display panel manufacturing has also become more mature. Display panels provided by existing technologies include liquid crystal display panels, organic light emitting display panels, plasma display panels, and the like.

[0003] Liquid crystal display panels have the advantages of being thin, light, low power consumption and low radiation, and are widely used in various fields such as consumer electronics, automobiles, rail transit, aviation and defense. Liquid crystal display panels usually include a color filter substrate and an array substrate arranged relatively to each other, and a liquid crystal layer between the color filter substrate and the array substrate. A black matrix and a color resistance layer are provided on the side of the color filter substrate close to the array substrate. The electric field between the pixel electrode and the common electrode in the display panel can deflect the liquid crystal molecules. After the liquid crystal molecules are deflected, the light generated by the backlight assembly will pass through the display panel. By adjusting the size of the electric field, the liquid crystal molecules can be deflected to different degrees. When the liquid crystal molecules are deflected to different degrees, the light transmittance of the display panel is different, and the amount of light transmitted through the liquid crystal display panel by the backlight assembly is different, thereby realizing the display of the image. Of course, with the improvement of customer experience requirements, including special needs of special applications, higher requirements are put forward for display quality. For example, in order to improve contrast, dual-screen display modules have emerged. The dual-screen display module controls the amount of light entering the color display panel through the black and white display panel, and minimizes the black state brightness to achieve a higher viewing angle contrast than the traditional single color display panel. However, there are moiré patterns in the dual-screen display module.

[0004] Therefore, there is an urgent need to provide a dual-screen display module and a display device that can improve moiré patterns. Summary of the invention

[0005] In view of this, the present invention provides a display module and a display device for improving moiré patterns.

[0006] In one aspect, the present invention discloses a display module, comprising: a first display panel and a second display panel arranged opposite to each other, wherein the first display panel is located on a side of the second display panel close to a light emitting surface of the display module;

[0007] It also includes a light adjustment layer, which is located between the second display panel and the first display panel. The light adjustment layer includes a plurality of dimming units. The dimming unit includes a curved surface portion that is recessed toward the inside of the light adjustment layer. The curved surface portion forms a microstructure concave lens.

[0008] The second display panel includes a first black matrix, the first black matrix includes a first sub-black matrix extending along a first direction and a second sub-black matrix extending along a second direction, the first direction intersects with the second direction, and in a direction perpendicular to the light emitting surface of the display module, the curved portion at least partially overlaps with an edge of the first sub-black matrix, and / or the curved portion at least partially overlaps with an edge of the second sub-black matrix.

[0009] On the other hand, the present invention further provides a display device, comprising the above-mentioned display module, and further comprising a backlight module located on a side of the display module away from a light emitting surface of the display module.

[0010] Compared with the prior art, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0011] In the present invention, a light adjustment layer is added between the second display panel and the first display panel, the light adjustment layer is located between the second display panel and the first display panel, the light adjustment layer diverges the light emitted by the second display panel, the light adjustment layer includes a curved portion recessed toward the inside of the light adjustment layer, the curved portion forms a concave lens, the second display panel includes a first black matrix, the first black matrix includes a first sub-black matrix extending along a first direction and a second sub-black matrix extending along a second direction, the first direction intersects with the second direction, in a direction perpendicular to the light emitting surface of the display module, the curved portion at least partially overlaps with an edge of the first sub-black matrix, and / or the curved portion at least partially overlaps with an edge of the second sub-black matrix, the concave lens has the function of making light The light emitted by the second display panel enters the light adjustment layer from the edge of the first sub-black matrix and / or the second sub-black matrix, and the concave lens formed on the curved surface diverges the light. When the light passes through the edge of the second black matrix of the first display panel, the light is no longer emitted from a single direction, but propagates in all directions. When observed from the light emitting surface side of the first display panel, the first sub-black matrix and / or the second sub-black matrix of the second display panel is no longer a regular line, and the first black matrix of the second display panel will no longer interfere constructively with the second black matrix of the first display panel, thereby destroying the interference between the second display panel and the first display panel at a constant angle and frequency, thereby improving the moiré pattern.

[0012] Of course, any product implementing the present invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0013] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0015] Figure 1 It is a schematic diagram of the planar structure of a display module provided by the present invention;

[0016] Figure 2 yes Figure 1 A cross-section in the A-A' direction;

[0017] Figure 3 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of a light adjustment layer provided by the present invention;

[0019] Figure 5 It is a schematic diagram of an optical path provided by the present invention;

[0020] Figure 6 This is the principle diagram of producing moiré patterns;

[0021] Figure 7 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0022] Figure 8 is a schematic diagram of a three-dimensional structure of another light adjustment layer provided by the present invention;

[0023] Fig. 9 It is another optical path schematic diagram provided by the present invention;

[0024] Fig.10 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0025] Fig.11 is a schematic diagram of a three-dimensional structure of another light adjustment layer provided by the present invention;

[0026] Fig.12 It is another optical path schematic diagram provided by the present invention;

[0027] Fig.13 yes Figure 1 A cross-section in the B-B' direction;

[0028] Fig.14 yes Figure 1 Another cross-section in the B-B' direction;

[0029] Fig.15 yes Figure 1 Another cross-section in the B-B' direction;

[0030] Fig.16 yes Figure 1 Another cross-section in the B-B' direction;

[0031] Fig.17 yes Figure 1 Another cross-section in the B-B' direction;

[0032] Fig.18 yes Figure 1 Another cross-section in the B-B' direction;

[0033] Fig.19 is a cross-sectional view of a dimming unit provided by the present invention;

[0034] Fig. 20 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0035] Fig.21 It is a three-dimensional diagram of another dimming layer provided by the present invention;

[0036] Fig. 22 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0037] Fig.23 It is a three-dimensional diagram of another dimming layer provided by the present invention;

[0038] Fig.24 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0039] Fig.25 It is a three-dimensional diagram of another dimming layer provided by the present invention;

[0040] Fig.26 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0041] Fig. 27 yes Figure 1 Another cross-sectional view along the A-A' direction;

[0042] Fig.28 It is a schematic diagram of a planar structure of a display device provided by the present invention;

[0043] Fig.29 yes Fig.28 A cross-section along the G-G' direction. DETAILED DESCRIPTION

[0044] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0045] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0047] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0048] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0049] Reference Figures 1 to 5 , Figure 1 is a schematic diagram of a planar structure of a display module provided by the present invention, Figure 2 yes Figure 1 A cross-section along the A-A' direction, Figure 3 yes Figure 1 Another cross-sectional view along the A-A' direction, Figure 4 is a schematic diagram of a three-dimensional structure of a light adjustment layer provided by the present invention, Figure 5 : is a schematic diagram of an optical path provided by the present invention; a display module 100 of this embodiment comprises: a first display panel 10 and a second display panel 20 arranged opposite to each other, the first display panel 10 is located on a side of the second display panel 20 close to a light emitting surface K1 of the display module 100;

[0050] The light adjustment layer 30 is located between the second display panel 20 and the first display panel 10. The light adjustment layer 30 includes a plurality of dimming units 301. The dimming unit 301 includes a curved surface 40 that is recessed into the light adjustment layer 30. The curved surface 40 forms a microstructure concave lens.

[0051] The second display panel 20 includes a first black matrix BM1, the first black matrix BM1 includes a first sub-black matrix BM11 extending along a first direction X and a second sub-black matrix BM12 extending along a second direction Y, and in a direction perpendicular to a light emitting surface K1 of the display module, the curved portion 40 at least partially overlaps with an edge of the first sub-black matrix BM11, and / or the curved portion 40 at least partially overlaps with an edge of the second sub-black matrix BM12.

[0052] Specifically, the display module 100 includes a display area AA and a non-display area BB surrounding the display area AA. Of course, the non-display area BB may also partially surround the display area AA, such as a water drop screen, which is not specifically limited here. It can be understood that the display module 100 includes a first display panel 10 and a second display panel 20 arranged opposite to each other. The first display panel 10 is located on a side of the second display panel 20 close to the light-emitting surface K1 of the display module 100. Figure 2 The positional relationship between the first display panel 10, the second display panel 20 and the light adjustment layer 30 is schematically shown in FIG. Figure 3 The display module 100 of the present invention is a dual-screen display module 100. Optionally, the first display panel 10 is a color display panel, and the second display panel 20 is a black-and-white display panel. The second display panel 20 can be added to improve the contrast of the display module 100. Optionally, in the bright state, the first display panel 10 and the second display panel 20 are simultaneously in the maximum transmittance state, and in the black state, the first display panel 10 and the second display panel 20 are simultaneously in the minimum transmittance state. Finally, the contrast of the display module 100 is the product of the contrast of the first display panel 10 and the contrast of the second display panel 20. For example, the white state of the first display panel 10 The transmittance is 5%, and the black state transmittance is 0.005%, so the contrast of the first display panel 10 = 5%: 0.005% = 1000:1, and the white state transmittance of the second display panel 20 is 90%, and the black state transmittance is 5%, so the contrast of the second display panel 20 = 90%: 5% = 18:1, then the final contrast of the display module 100 is the product of the contrast of the first display panel 10 and the contrast of the second display panel 20, which is equal to 18000:1, which is 18 times higher than when only the first display panel 10 is provided. In this way, the contrast of the display module 100 can be significantly improved by reducing the black state transmittance.

[0053] It should be noted that a backlight module (not shown) is also required to be arranged on the side of the second display panel 20 away from the first display panel 10 . The backlight module provides backlight, and the backlight light passes through the second display panel 20 and the first display panel 10 in sequence.

[0054] Figure 1 It is shown in FIG. 1 that the first sub-black matrix BM11 extends along the first direction X, and the second sub-black matrix BM12 extends along the second direction Y. Figure 1The first black matrix BM1 and the second black matrix BM2 of the first display panel 10 overlap. The first sub-black matrix BM11 is a black matrix arranged horizontally, and the second sub-black matrix BM12 is a black matrix arranged vertically. In another embodiment provided by the present invention, the curved portion 40 at least partially overlaps with the first sub-black matrix BM11. In another embodiment provided by the present invention, in a direction perpendicular to the light emitting surface K1 of the display module, the curved portion 40 at least partially overlaps with the first sub-black matrix BM11, and the curved portion 40 at least partially overlaps with the second sub-black matrix BM12.

[0055] Figure 1 and Figure 3 It only shows the situation that the curved portion 40 at least partially overlaps with the edge of the second sub-black matrix BM12 in the direction perpendicular to the light emitting surface K1 of the display module. Of course, the curved portion 40 may also at least overlap with the edge of the first sub-black matrix BM11. In addition, the edge of the first sub-black matrix BM11 in the present invention refers to the edge abutting the opening of the second sub-pixel 20P in the second direction Y, and the edge of the second sub-black matrix BM12 refers to the edge abutting the opening of the second sub-pixel 20P in the first direction X. In addition, in the direction perpendicular to the light emitting surface K1 of the display module, the curved portion 40 may cover the edge of the first sub-black matrix BM11 and / or cover the edge of the second sub-black matrix BM12, which is not shown in the figure. Figure 3 The middle curved surface portion 40 does not cover the opening position of the second sub-pixel 20P.

[0056] Optional, see Figure 3 , Figure 3 FIG. 1 shows that the first display panel 10 includes a first base substrate 101 and a second base substrate 102. Figure 3The first substrate 101 and the second substrate 102 are not pattern-filled. Optionally, the first substrate 101 and the second substrate 102 may be made of glass material, or PI (polyimide). The second substrate 102 includes a first array layer 106 on the side close to the first substrate 101, and the first array layer 106 includes transistors (not shown in the figure). The first substrate 101 includes a color filter layer 107 on the side close to the second substrate 102. Of course, the color filter layer 107 may include a plurality of second black matrices BM2, and color resistors are provided between the second black matrices BM2. From the process point of view, the second black matrix BM2 may be manufactured first, the opening position of the first sub-pixel may be reserved, and then the color resistor may be manufactured; or the color resistors with intervals may be manufactured first, and then the second black matrix BM2 may be manufactured in the intervals between the color resistors. Here, the color filter layer 107 is not manufactured. The process sequence of the color filter layer 107 is limited. After the light passes through the color resistance of the color filter layer 107, it emits colored light. The side of the first array layer 106 away from the second base substrate 102 also includes a second electrode 104, and the second electrode 104 can be a common electrode. The side of the second electrode 104 away from the second base substrate 102 includes a first electrode 103, and the first electrode 103 can be a pixel electrode. The first liquid crystal molecule 105 is sandwiched between the color filter layer 107 and the first electrode 103. Of course, the second base substrate 102 can also be bound with an IC to provide a driving signal for the transistor in the first array layer 106 and a common voltage signal for the second electrode 104. The electric field between the first electrode 103 and the second electrode 104 can deflect the first liquid crystal molecule 105. When the degree of deflection of the first liquid crystal molecule 105 is different, the light transmittance of the first display panel 10 is different. The second display panel 20 includes a third base substrate 201 and a fourth base substrate 202. The third base substrate 201 and the fourth base substrate 202 can be glass substrates or PI. Figure 2 The third substrate 201 and the fourth substrate 202 are not pattern-filled. The side of the fourth substrate 202 close to the third substrate 201 includes a second array layer 206, and the second array layer 206 also includes a transistor (not shown in the figure). The side of the second array layer 206 close to the third substrate 201 includes a fourth electrode 204, and the fourth electrode 204 can be a common electrode. The side of the fourth electrode 204 close to the third substrate 201 includes a third electrode 203, and the third electrode 203 can be a pixel electrode. Between the third electrode 203 and the third substrate 201 are second liquid crystal molecules 205. The fourth substrate 202 can be bound with an IC, and the IC provides a driving signal for the transistor in the second array layer 206 and a common voltage signal for the fourth electrode 204. The electric field between the third electrode 203 and the fourth electrode 204 can deflect the second liquid crystal molecules 205. When the degree of deflection of the second liquid crystal molecules 205 is different, the transmittance of the second display panel 20 is different.

[0057] In the related art, the sub-pixel spatial frequencies of the black and white display panel and the color display panel of the dual-screen display module are close, resulting in high-frequency interference stripes, i.e., moiré patterns. It is understandable that the black matrix in the display panel can be regarded as a line, and the sub-pixels between the black matrix are light-transmitting areas. The sub-pixels and the black matrix are arranged regularly, and interference occurs when light passes through the edge of the black matrix. There are certain errors in the alignment accuracy when the black and white display panel and the color display panel are fitted together. The black matrices of the black and white display panel and the color display panel are two intersecting lines. These two lines interfere constructively at a constant angle and frequency. When the human eye cannot distinguish these two lines, interference patterns, i.e., moiré patterns, will be seen. The number and size of sub-pixels of the two black and white display panels and the color display panel can correspond one to one, or in multiples; the sub-pixel directions can completely overlap, or they can be in a certain angle relationship, such as Figure 6 As shown, Figure 6 This is a schematic diagram of the principle of generating moiré patterns. A group of stripes with a spacing of a and a group of stripes with a spacing of b are fitted at an angle of θ. The two will produce a series of intersections, and these intersections are connected to form moiré patterns visible to the human eye. The moiré patterns of the dual-screen display module are related to the shape and size of the black matrices of the two display panels, the alignment accuracy of the two screens, etc. In the related art, in order to improve the moiré patterns of the dual-screen display module, the sub-pixels of the black and white display panel are usually set to irregular sub-pixels or domain lines are set. However, setting the sub-pixels in the black and white display panel as irregular sub-pixels or setting domain lines will increase the difficulty of the process of the black and white display panel and increase the production cost.

[0058] Figure 2 and Figure 3In the above, only the curved portion 40 is provided on the side of the light adjustment layer 30 close to the first display panel 10 as an example for schematic description. Of course, the light adjustment layer 30 may also be provided with the curved portion 40 on the side close to the second display panel 20, or the curved portion 40 is provided on both the side close to the first display panel 10 and the side close to the second display panel 20 of the light adjustment layer 30. In the present invention, the curved portion 40 is concave to form a microstructure concave lens, and it can be understood that the microstructure concave lens has the function of diverging light. In the present invention, a light adjustment layer 30 is included between the second display panel 20 and the first display panel 10. Specifically, the light adjustment layer 30 is located on one side of the light emitting surface of the second display panel 20 and on the side of the first display panel 10 close to the second display panel 20. The light adjustment layer 30 diverges the light emitted by the second display panel 20. The light adjustment layer 30 includes a curved portion 40 recessed into the dimming layer 30. The curved portion 40 is a microstructured concave lens. In a direction perpendicular to the light emitting surface K1 of the display module, the curved portion 40 at least partially overlaps with an edge of the first sub-black matrix BM11, and / or the curved portion 40 at least partially overlaps with an edge of the second sub-black matrix BM12. The concave lens has the function of diverging light. When the light emitted by the second display panel 20 enters the light adjustment layer 30, the concave lens formed by the curved portion 40 diverges the light. Figure 5 , Figure 5 It is a schematic diagram of an optical path provided by the present invention, in which the light entering the center ZX of the curved surface portion 40 along a direction perpendicular to the light emitting surface K1 of the display module is still emitted along a direction perpendicular to the plane where the first display panel 10 is located and enters the first display panel 10, while the light entering the edge BY of the curved surface portion 40 along a direction perpendicular to the light emitting surface K1 of the display module is refracted after passing through the curved surface portion 40, specifically, refracted and diverged in a direction away from the center ZX of the curved surface portion 40, and the farther away from the center ZX of the curved surface portion 40, the greater the angle between the refracted light and the third direction Z. In this way, the light passing through the edge of the first sub-black matrix BM11 and / or the second sub-black matrix BM12 is refracted and diverged after passing through the curved surface portion 40. After the light emitted from the curved surface portion 40 enters the first display panel 10, it is no longer emitted from a single direction when passing through the edge of the second black matrix BM2 of the first display panel 10, but propagates in all directions. The light from the second display panel 20 can be diverged and amplified for display, thereby destroying the spatial frequency of the sub-pixels of the second display panel 20. When observed from the light-emitting surface side of the first display panel 10, the black matrix of the first display panel 10 is no longer a regular line. Then, the first sub-black matrix BM11 and / or the second sub-black matrix BM12 of the second display panel 20 will no longer interfere constructively with the second black matrix BM2 of the first display panel 10, thereby destroying the interference between the second display panel 20 and the first display panel 10 at a constant angle and frequency at different degrees, thereby reducing the interference of the second display panel 20 on the first display panel 10 and improving the moiré pattern.

[0059] Furthermore, the present invention does not need to set special shapes or domain lines for the sub-pixels in the second display panel 20 , which does not increase the difficulty of manufacturing the second display panel 20 and reduces the production cost of the display module 100 .

[0060] In some optional embodiments, continue to refer to Figures 2 to 4 , and reference Figures 7 to 12 , Figure 7 yes Figure 1 Another cross-sectional view along the A-A' direction, Figure 8 is a schematic diagram of a three-dimensional structure of another light adjustment layer provided by the present invention, Fig. 9 is another optical path schematic diagram provided by the present invention, Fig.10 yes Figure 1 Another cross-sectional view along the A-A' direction, Fig.11 is a schematic diagram of a three-dimensional structure of another light adjustment layer provided by the present invention, Fig.12 This is another optical path schematic diagram provided by the present invention.

[0061] The curved surface portion 40 is located on a side of the dimming unit 301 close to the first display panel 10 , and / or the curved surface portion 40 is located on a side of the dimming unit 301 close to the second display panel 20 .

[0062] Figures 2 to 5 FIG. 4 shows that the curved portion 40 is located on a side of the dimming unit 301 close to the first display panel 10. Figures 7 to 9 The middle curved portion 40 is located on a side of the dimming unit 301 close to the second display panel 20. Figures 10 to 12 , it is shown that the curved portion 40 is located on a side of the dimming unit 301 close to the first display panel 10 and on a side of the second display panel 20 .

[0063] Reference Fig. 9 , Fig. 9In the embodiment, the light entering the center ZX of the curved surface portion 40 along the direction perpendicular to the light emitting surface K1 of the display module is still emitted in the direction perpendicular to the plane where the first display panel 10 is located to enter the first display panel 10, while the light entering the edge BY of the curved surface portion 40 along the direction perpendicular to the light emitting surface K1 of the display module will undergo a first refraction in the dimming unit 301 after passing through the curved surface portion 40, specifically, it will be refracted and diverged in the direction away from the center ZX of the curved surface portion 40, and then it will undergo a second refraction on the side of the light regulating layer 30 close to the first display panel 10, and it will be refracted and diverged again in the direction away from the center ZX of the curved surface portion 40, and the farther away from the center ZX of the curved surface portion 40, the greater the angle between the refracted light and the third direction Z, and the third direction Z refers to the direction from the light emitting portion of the dimming unit 301 to the first display module. After the panel 10, when passing through the edge of the second black matrix BM2 of the first display panel 10, the light is no longer emitted from a single direction, but propagates in all directions, so that the light from the second display panel 20 can be diverged and amplified for display, thereby destroying the spatial frequency of the sub-pixels of the second display panel 20. When observed from the light-emitting surface side of the first display panel 10, the second black matrix BM2 of the first display panel 10 is no longer a regular line, so the first sub-black matrix BM11 and / or the second sub-black matrix BM12 of the second display panel 20 will no longer interfere constructively with the second black matrix BM2 of the first display panel 10, thereby destroying the interference between the second display panel 20 and the first display panel 10 at a constant angle and frequency, thereby reducing the interference of the second display panel 20 to the first display panel 10 and improving the moiré pattern.

[0064] Reference Fig.12In the embodiment, the light entering the center ZX of the curved surface portion 40 along the direction perpendicular to the light emitting surface K1 of the display module is still emitted in the direction perpendicular to the plane where the first display panel 10 is located and enters the first display panel 10, while the light entering the edge BY of the curved surface portion 40 along the direction perpendicular to the light emitting surface K1 of the display module will undergo a first refraction in the dimming unit 301 after passing through the curved surface portion 40 close to the second display panel 20, specifically, it will be refracted and diverged in the direction away from the center ZX of the curved surface portion 40, and part of the light will be reflected from the side of the dimming unit 301, and then it will undergo a second refraction on the curved surface portion 40 close to the first display panel 10, and will be refracted and diverged again in the direction away from the center ZX of the curved surface portion 40, and the farther away from the center ZX of the curved surface portion 40, the more the light exiting from the dimming unit 301 will enter the dimming unit 301. After the first display panel 10, when passing through the edge of the second black matrix BM2 of the first display panel 10, it is no longer emitted from a single direction, but propagates in all directions, and the light from the second display panel 20 can be amplified and displayed, destroying the spatial frequency of the sub-pixels of the second display panel 20. When observed from the light-emitting side of the first display panel 10, the second black matrix BM2 of the first display panel 10 is no longer a regular line, so the first sub-black matrix BM11 and / or the second sub-black matrix BM12 of the second display panel 20 will no longer interfere with the second black matrix BM2 of the first display panel 10, destroying the interference of the second display panel 20 and the first display panel 10 at a constant angle and frequency, thereby reducing the interference of the second display panel 20 on the first display panel 10 and improving the moiré. On the other hand, when the curved surface 40 is located on both sides, that is, the dimming unit 301 is a double concave structure, the light output of the second display panel 20 passes through the curved surface 40 twice and the light is diverged, and the light distribution is more random, which has a better effect on the divergence of light from the second display panel 20.

[0065] In the present invention, whether the curved surface portion 40 is located on the side of the dimming unit 301 close to the first display panel 10 or the side close to the second display panel 20 , the moiré pattern can be improved.

[0066] In some optional embodiments, referring to Figure 3 and Fig.14 , Fig.14 yes Figure 1 In another cross-sectional view taken along the BB′ line, there is a gap between adjacent curved surface portions 40 .

[0067] Figure 3 FIG. 4 shows that there is a gap between the curved surface portions 40 along the first direction X. In the first direction X, there is a gap between the curved surface portions 40 by one sub-pixel or a plurality of sub-pixels. Fig.14, it is shown that there are also intervals between the curved surface portions 40 along the second direction Y, and the curved surface portions 40 are arranged in a dot matrix. In some optional embodiments, there are intervals between the curved surface portions 40 only along the first direction X, or there are intervals between the curved surface portions 40 only along the second direction Y.

[0068] In this embodiment, there are intervals between the curved surface portions 40 along the first direction X and / or along the second direction Y, which can greatly reduce the number of the curved surface portions 40 , thereby improving the moiré pattern and reducing the manufacturing difficulty and cost.

[0069] In some optional embodiments, continue to refer to Figure 1 , Figure 3 and reference Fig.13 , Fig.13 yes Figure 1 A cross-sectional view taken along the BB' direction, wherein adjacent second sub-black matrices BM12 along the first direction X include sub-pixel columns PY, and adjacent curved surface portions 40 along the first direction X include at least one sub-pixel column PY; and / or, adjacent first sub-black matrices BM11 along the second direction Y include sub-pixel rows PX, and adjacent curved surface portions 40 along the second direction Y include at least one sub-pixel row PX.

[0070] Fig.13 In the figure, only the arrangement of the curved surface portion 40 along the second direction Y is taken as an example. Figure 3 In the figure, only one sub-pixel column PY is included between adjacent curved surface portions 40 along the first direction X as an example for schematic illustration. Of course, multiple sub-pixel columns PY may be included between adjacent curved surface portions 40, which are not shown in the figure. Of course, at least one sub-pixel column PY may be included between adjacent curved surface portions 40 along the first direction X, and at least one sub-pixel row PX may be included between adjacent curved surface portions 40 along the second direction Y.

[0071] Figure 3 The curved portion 40 at least partially overlaps with the second sub-black matrix BM12 , that is, the curved portion 40 is arranged along the first direction X. Fig.13In the middle, multiple curved surface portions 40 are arranged along the second direction Y, and there is no gap between the curved surface portions 40 and they are closely connected. At this time, it is easy to make the curved surface portion 40, and the curved surface portion 40 can be made in a whole strip. Moreover, the curved surface portions 40 are closely arranged along the second direction Y, so that the curved surface portion 40 can overlap at least partially with the second sub-black matrix BM12, and the light output at the edge of the second sub-black matrix BM12 can be better amplified and displayed. Of course, this is only one of the possible embodiments, and the curved surface portions 40 can also be arranged at intervals, which is not specifically limited here. It can be understood that the curved surface portions 40 here are arranged along the second direction Y, so along the first direction X, adjacent curved surface portions 40 can be separated by one second sub-pixel 20P, or multiple second sub-pixels 20P, which is not specifically limited here. Of course, along the first direction X, when there is only one second sub-pixel 20P between adjacent curved surface portions 40, the position of each second sub-black matrix BM12 edge can be diffusely amplified and displayed to improve moiré.

[0072] In another embodiment of the present invention, adjacent curved surface portions 40 are arranged along the first direction X, and along the second direction Y, there is one sub-pixel row PX between adjacent curved surface portions 40 , and of course, there may be multiple sub-pixel rows PX.

[0073] In another embodiment of the present invention, adjacent curved surface portions 40 are arranged along the second direction Y and are also arranged along the second direction Y. Along the first direction X, adjacent curved surface portions 40 include one sub-pixel column PY or multiple sub-pixel columns PY, and along the second direction Y, adjacent curved surface portions 40 include one or more sub-pixel rows PX.

[0074] It can be understood that when a sub-pixel column PY is included between adjacent curved surface portions 40 along the first direction X and / or a sub-pixel row PX is included between adjacent curved surface portions 40 along the second direction Y, the light emitted from the edge of each first black matrix BM1 can be diffused and amplified, thereby improving the effect of moiré patterns more finely;

[0075] When adjacent curved surface portions 40 along the second direction Y include a plurality of sub-pixel columns PY, and / or adjacent curved surface portions 40 along the second direction Y include a plurality of sub-pixel rows PX, the number of curved surface portions 40 can be reduced, thereby reducing the production cost and difficulty, but the moiré pattern can still be improved.

[0076] In some optional embodiments, referring to Fig.15 , Fig.16 and Fig.17 , Fig.15 yes Figure 1 Another cross-sectional view in the B-B' direction, Fig.16 yes Figure 1 Another cross-sectional view in the B-B' direction, Fig.17 yes Figure 1 In another cross-sectional view along the BB′ direction, the connection between two adjacent dimming units 301 further includes a planar portion 50 connected to the curved portion 40 , and the side of the planar portion 50 away from the interior of the dimming unit 301 further includes diffusion particles 501 .

[0077] The flat surface portion 50 connects the curved surface portions 40 of two adjacent dimming units 301. Fig.15 The middle curved portion 40 is located on a side close to the first display panel 10 , and the flat portion 50 may also be located on a side close to the first display panel 10 . Fig.16 In the embodiment, the curved portion 40 is located on a side close to the second display panel 20, and the flat portion 50 is also located on a side close to the second display panel 20. Fig.17 The middle curved portion 40 is located on a side close to the first display panel 10 and a side close to the second display panel 20 , and the planar portion 50 is located on a side close to the first display panel 10 and a side close to the second display panel 20 .

[0078] Fig.15 The diffusion particles 501 are coated on the side of the plane portion 50 close to the first display panel 10. Fig.16 The diffusion particles 501 are coated on the side of the plane portion 50 close to the second display panel 20. Fig.17 The diffusion particles 501 are coated on the side of the plane portion 50 close to the first display panel 10, and the diffusion particles 501 are also coated on the side of the plane portion 50 close to the second display panel 20, so that the light from the second display panel 20 can be amplified and displayed on the surface of the diffusion particles 501, thereby enhancing the concealing effect, destroying the pixel spatial frequency of the second display panel 20, reducing the interference of the second display panel 20 on the first display panel 10, eliminating moiré patterns, and increasing the reliability of the display module 100 in terms of anti-vibration, anti-friction, etc.

[0079] In some optional embodiments, referring to Fig.18 , Fig.18 yes Figure 1 In another cross-sectional view taken along the BB′ line, in a direction perpendicular to the light emitting surface K1 of the display module, the diffusion particles 501 at least partially overlap with the first black matrix BM1 .

[0080] The first black matrix BM1 herein may refer to a first sub-black matrix BM11 and a second sub-black matrix BM12 .

[0081] In this embodiment, the diffusion particles 501 are arranged at the position BM1 of the first black matrix of the second display panel 20. In the direction perpendicular to the plane where the first display panel 10 is located, the diffusion particles 501 of the plane portion 50 at least partially overlap with the first black matrix BM1 of the second display panel 20. The side of the third base substrate 201 close to the third electrode 203 includes the first black matrix BM1. Since the position of the first black matrix BM1 of the second display panel 20 itself does not have a display function, in the direction perpendicular to the plane where the first display panel 10 is located, the diffusion particles 501 of the plane portion 50 at least partially overlap with the first black matrix BM1 of the second display panel 20. There will be no light loss due to the arrangement of the diffusion particles 501, and the reliability of the display module 100 in terms of anti-vibration, friction, etc. can also be increased.

[0082] In some optional embodiments, referring to Fig.19 , Fig.19 is a cross-sectional view of a dimming unit provided by the present invention. Fig.19 The cross-sectional view may be in the row direction or the column direction, which is not specifically limited here. The orthographic projection of the curved surface portion 40 on the first section 60 is an arcuate shape, the radius of the arcuate shape is r, the width of the arcuate shape is w, wherein cos40°≤w / 2r≤cos60°, and the first section 60 is perpendicular to the plane where the first display panel 10 is located and passes through the center of the dimming unit 301.

[0083] Fig.19 In the figure, only the curved surface portion 40 is provided on one side of the light modulation layer 30 as an example for schematic description. Fig.19 The first section is not pattern filled. Fig.19 After the middle curved portion 40 is recessed into the light adjustment layer 30, it will have a curved surface radius, that is, the radius r of the arc of the curved portion 40 on the first section 60. When the width of the arc is w, according to trigonometric functions, cosα=w / 2r. It can be understood that in order to improve the moiré of the display module 100, the width w of the arc needs to be greater than the pitch Pitch of one sub-pixel. Here, the pitch includes the width of the sub-pixel itself and the width of the black matrix. Figure 1 , generally, the width of the first black matrix BM11 in the first direction X and the second direction Y is different, such as Figure 1 The first sub-black matrix BM11 extends along the first direction X, and the width of the first sub-black matrix in the second direction Y is generally between 15um and 35um. The second sub-black matrix BM12 extends along the second direction Y, and along the first direction X, the width of the second sub-black matrix BM12 is generally between 5um and 15um. Cos40°≤w / 2r≤cos60° can improve the moiré pattern of the display module 100 with a black matrix width of 15um to 35um in the horizontal direction and a black matrix width of 5um to 15um in the vertical direction.

[0084] In some optional embodiments, Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 and Fig.25 , Fig. 20 yes Figure 1 Another cross-sectional view along the A-A' direction, Fig.21 is a three-dimensional diagram of another dimming layer provided by the present invention. Fig. 22 yes Figure 1 Another cross-sectional view along the A-A' direction, Fig.23 is a three-dimensional diagram of another dimming layer provided by the present invention. Fig.24 yes Figure 1 Another cross-sectional view along the A-A' direction, Fig.25 It is a three-dimensional diagram of another dimming layer provided by the present invention. The first display panel 10 includes a first sub-pixel 10P, the second display panel includes a second sub-pixel 20P, the first black matrix BM1 surrounds the opening of the second sub-pixel 20P, and in a direction perpendicular to the plane where the light emitting surface K1 of the display module is located, the dimming unit 301 at least partially overlaps with the opening of at least one second sub-pixel 20P.

[0085] Fig. 20 and Fig.21 Only the curved portion is shown on the side of the dimming layer 30 close to the first display panel 10. The optical path diagram can be referred to Figure 5 , Fig. 22 and Fig.23 The curved portion 40 is shown in FIG. 1 and is located on the side of the dimming layer 30 close to the second display panel 20. The optical path diagram can be referred to in FIG. Fig. 9 , Fig.24 and Fig.25 The curved portion 40 is shown in FIG. 1 and is located on the side of the dimming layer 30 close to the first display panel 10 and the side of the dimming layer 30 close to the second display panel 20. The optical path diagram can be referred to FIG. Fig.12 .

[0086] In the related technology, a diffusion layer is added between the black and white display panel and the color display panel to improve the moiré problem. Diffusion particles are added to the diffusion layer. When the light from the black and white display panel shines on the diffusion particles, the diffusion particles are spherical particles, so the light is dispersed, thereby improving the moiré. Although the diffusion layer can disperse the light and thus improve the moiré, a portion of the light is reflected back to the black and white display panel on the lower layer after passing through the diffusion sheet and the diffusion particles, and cannot be emitted to the color display panel on the upper layer, causing light loss.

[0087] In this embodiment, the curved portion 40 can be set on the entire surface, and at least partially overlap with the edge of the first black matrix BM1 in the direction perpendicular to the plane where the light-emitting surface K1 of the display module is located, which can improve the moiré pattern. On the other hand, in the direction perpendicular to the plane where the light-emitting surface K1 of the display module is located, the dimming unit 301 at least partially overlaps with the opening of at least one second sub-pixel 20P, diffuses the light of the opening of the second sub-pixel 20P, and plays the role of a diffusion layer, which can replace the diffusion layer in the related technology. At the same time, there is no need to set diffusion particles at the position corresponding to the opening of the second sub-pixel 20P, so no light will be reflected back to the second display panel 20, no light loss will be caused, and the light efficiency of the display panel is improved.

[0088] Continue to refer to Fig.24 , Fig.24 The first display panel 10 includes a first sub-pixel 10P, and the second display panel 20 includes a second sub-pixel 20P; in a direction perpendicular to the plane where the light emitting surface K1 of the display module 100 is located, the dimming unit 301 at least partially overlaps with an opening of a second sub-pixel 20P. Fig.24 In the embodiment, after the light output of a second sub-pixel 20P enters the dimming unit 301, it will be refracted on the curved surface 40, and the light has an angle with the third direction Z. The dimming unit 301 amplifies and displays the light output of a second sub-pixel 20P, thereby destroying the interference of the second display panel 20 and the first display panel 10 at a constant angle and frequency, reducing the interference of the second display panel 20 on the first display panel 10, and improving the moiré. It can be understood that the dimming unit 301 at least partially overlaps with the opening of a second sub-pixel 20P, and after the light output of a second sub-pixel 20P enters the dimming unit 301, it will be refracted on the curved surface 40, and the light has an angle with the third direction Z. The dimming unit 301 can amplify and display the light output of each second sub-pixel 20P, and improve the moiré more finely.

[0089] Of course, in the direction perpendicular to the plane where the light-emitting surface K1 of the display module 100 is located, one dimming unit 301 at least partially overlaps with the openings of two second sub-pixels 20P or more than two second sub-pixels 20P, which is not shown in the figure. It can be understood that since the size of the second sub-pixel 20P is usually small, one dimming unit 301 at least partially overlaps with the openings of two second sub-pixels 20P or more than two second sub-pixels 20P, then the curved portion 40 of the dimming unit 301 does not need to be made relatively large, which can reduce the production cost of the light adjustment layer 30.

[0090] In some optional embodiments, referring to Fig.26 , Fig.26 yes Figure 1In another cross-sectional view taken along the line AA′, in a direction perpendicular to the plane where the light emitting surface K1 of the display module 100 is located, a second sub-pixel 20P overlaps with at least one first sub-pixel 10P.

[0091] The orthographic projection of a second sub-pixel 20P on the light-emitting surface K1 of the display module 100 overlaps with the orthographic projection of a first sub-pixel 10P on the light-emitting surface K1 of the display module 100. At this time, one second sub-pixel 20P corresponds to one first sub-pixel 10P. In the bright state, the first display panel 10 and the second display panel 20 are both in the maximum transmittance state. In the dark state, the first display panel 10 and the second display panel 20 are both in the minimum transmittance state. Finally, the contrast of the display device is the product of the contrast of the first display panel 10 and the contrast of the second display panel 20, and the contrast is greatly improved.

[0092] Optionally, in a direction perpendicular to the plane where the light emitting surface K1 of the display module 100 is located, one second sub-pixel 20P overlaps with two or more first sub-pixels 10P, which can solve the problem of alignment deviation between the second sub-pixel 20P and the first sub-pixel 10P.

[0093] In some optional embodiments, continue to refer to Figures 2 to 5 , the refractive index n1 of the light adjustment layer 30 is obtained according to the following method:

[0094]

[0095] Wherein, σ is the phase difference of the light emitted from the second display panel 20 after passing through the light adjustment layer 30, λ is the wavelength of the light emitted from the second display panel 20, θ is the refraction angle of the light on the curved surface 40, and d is the thickness of the light adjustment layer 30 in a direction perpendicular to the plane where the light emitting surface K1 of the display module 100 is located.

[0096] It can be understood that the structures of the first display panel 10 and the second display panel 20 are fixed. For example, the substrates of the first display panel 10 and the second display panel 20 can be made of rigid materials such as glass or flexible materials such as polyimide. However, the added light adjustment layer 30 needs to meet the refractive index requirements so that the light entering the light adjustment layer 30 can be diffused, amplified and displayed, and can also play the role of anti-reflection and anti-transmittance, increase light utilization, and reduce the power consumption of the whole machine.

[0097] It should be noted that the phase difference here is the phase difference between the light entering the light adjustment layer 30 and the light emitting from the light adjustment layer 30, which is a multiple of the wavelength of the light calculated from the optical path difference or wavelength. When this multiple meets certain conditions, constructive or destructive interference between the light rays can occur, thereby achieving the purpose of enhancing the light output or weakening the light output intensity. The present invention can achieve the purpose of enhancing the light output through the phase difference, play the effect of reducing reflection and increasing transmittance, increase the utilization rate of light, and reduce the power consumption of the whole machine. Here, d is the average thickness of the light adjustment layer 30. Considering comprehensively that the thickness of the curved surface 40 will be reduced after it is recessed into the light adjustment layer 30.

[0098] Through the simulation calculation of Macleod software, Combined with the refractive index of the materials that can be used in the existing first display panel 10 and the second display panel 20, the refractive index n1 of the light adjustment layer 30 can be obtained, which can diffuse and amplify the light entering the light adjustment layer 30 for display, and can also play the role of anti-reflection and anti-transmittance, increase light utilization, and reduce the power consumption of the whole machine.

[0099] In some optional embodiments, continue to refer to Figures 2 to 5 , the refractive index of the light adjustment layer 30 is between 1.4 and 1.7.

[0100] Specifically, the light emitted from the second display panel 20 will first enter the air, the refractive index of air is 1.00029, and then enter the light adjustment layer 30 from the air. If refraction occurs on the curved surface 40 of the light adjustment layer 30, the light adjustment layer 30 needs to be a light-dense medium, so that the sparse light will be deflected when entering the dense light. Therefore, the refractive index of the light adjustment layer 30 needs to be greater than the refractive index of the air to ensure that the light emitted from the second display panel 20 is amplified and displayed.

[0101] It is understandable that when the refractive index is less than 1.4, the light adjustment layer 30 is close to the refractive index of air. When light enters the light adjustment layer from the air and diffuses, the angle with the third direction is small, and the effect of improving moiré is not ideal. When the refractive index is greater than 1.7, the refractive index of the light adjustment layer 30 is too large and cannot match the existing film layer in the display module. Combining the above formula and the calculation of the refractive index of the third base substrate 201 in the related art, it is known that the refractive index of the light adjustment layer 30 is between 1.4 and 1.7, which can be suitable for most of the materials of the third base substrate 201 in the related art. Here, the material of the third base substrate 201 is not limited to glass or polyimide.

[0102] In some optional embodiments, continue to refer to Figures 2 to 5 The material of the light adjustment layer 30 includes at least one of acrylic resin, polyester, polymethyl methacrylate, or polycarbonate.

[0103] It can be understood that the light emitted from the second display panel 20 will first enter the air, the refractive index of air is 1.00029, and then enter the light adjustment layer 30 from the air. If refraction occurs on the curved surface 40 of the light adjustment layer 30, the light adjustment layer 30 needs to be a light-dense medium, so that the sparse light will be deflected when entering the dense light. The refractive index of materials such as acrylic resin, polyester, polymethyl methacrylate, or polycarbonate is usually greater than the refractive index of air, which makes it easier to deflect light, so that the light will be refracted after entering the light adjustment layer 30, thereby improving moiré patterns.

[0104] In some optional embodiments, referring to Fig. 27 , Fig. 27 yes Figure 1 In another cross-sectional view along the line AA′, the light adjustment layer 30 is fixed to the first display panel 10 via a first optical adhesive layer 71 , and the light adjustment layer 30 is fixed to the second display panel 20 via a second optical adhesive layer 72 .

[0105] Optionally, the first optical adhesive layer 71 and the second optical adhesive layer 72 are made of the same material. Fig.19 The curved surface portion 40 is located at a side close to the first display panel 10 as an example for schematic illustration. Of course, the curved surface portion 40 may also be located at a side close to the second display panel 20, which is not specifically limited here.

[0106] The light adjustment layer 30 is bonded to the first display panel 10 through a first optical adhesive layer 71, and the light adjustment layer 30 is bonded to the second display panel 20 through a second optical adhesive layer 72. It can be understood that the optical adhesive is in liquid state, and after curing, the optical adhesive is colorless and transparent, with a light transmittance of more than 98%, which can reduce light loss. Of course, it also has the advantages of small curing shrinkage and yellowing resistance. Moreover, since the surface of the light adjustment layer 30 is uneven after the curved portion 40 is recessed into the interior of the light adjustment layer 30, the optical adhesive is a liquid glue with strong fluidity and good gap filling properties, and is suitable for complex structure bonding and filling the position of the curved portion 40.

[0107] The present invention also provides a display device, referring to Fig.28 and Fig.29 , Fig.28 is a schematic diagram of a planar structure of a display device provided by the present invention, Fig.29 yes Fig.28 In a cross-sectional view taken along the G-G' direction, the display device 1000 includes a display module 100, and also includes a backlight module 200 located on a side of the display module 100 away from a light emitting surface K1 of the display module, and the backlight module 200 provides backlight for the display module 100. Fig.28 and Fig.29The embodiment of the present invention only takes the vehicle-mounted display device as an example to illustrate the display device. It can be understood that the display device provided in the embodiment of the present invention can be a mobile phone, a computer, a television, an electronic paper or other display device with a display function, and the present invention does not specifically limit this. The display device provided in the embodiment of the present invention has the beneficial effects of the display module 100 provided in the embodiment of the present invention. For details, please refer to the specific description of the display module 100 in the above embodiments, and this embodiment will not be repeated here.

[0108] It can be seen from the above embodiments that the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0109] In the present invention, a light adjustment layer is added between the second display panel and the first display panel, the light adjustment layer is located between the second display panel and the first display panel, the light adjustment layer diverges the light emitted by the second display panel, the light adjustment layer includes a curved portion recessed toward the inside of the light adjustment layer, the curved portion forms a concave lens, the second display panel includes a first black matrix, the first black matrix includes a first sub-black matrix extending along a first direction and a second sub-black matrix extending along a second direction, the first direction intersects with the second direction, in a direction perpendicular to the light emitting surface of the display module, the curved portion at least partially overlaps with an edge of the first sub-black matrix, and / or the curved portion at least partially overlaps with an edge of the second sub-black matrix, the concave lens has the function of making light The light emitted by the second display panel enters the light adjustment layer from the edge of the first sub-black matrix and / or the second sub-black matrix, and the concave lens formed on the curved surface diverges the light. When the light passes through the edge of the second black matrix of the first display panel, the light is no longer emitted from a single direction, but propagates in all directions. When observed from the light emitting surface side of the first display panel, the first sub-black matrix and / or the second sub-black matrix of the second display panel is no longer a regular line, and the first black matrix of the second display panel will no longer interfere constructively with the second black matrix of the first display panel, thereby destroying the interference between the second display panel and the first display panel at a constant angle and frequency, thereby improving the moiré pattern.

[0110] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display module, characterized in that: include: A first display panel and a second display panel are arranged opposite to each other, wherein the first display panel is located on a side of the second display panel close to a light emitting surface of the display module; The device further comprises a light adjustment layer, which is located between the second display panel and the first display panel, wherein the light adjustment layer comprises a plurality of dimming units, wherein the dimming unit comprises a curved surface portion recessed into the light adjustment layer, wherein the curved surface portion forms a microstructure concave lens; the curved surface portion is located on a side of the dimming unit close to the first display panel, and / or the curved surface portion is located on a side of the dimming unit close to the second display panel; The second display panel includes a first black matrix, the first black matrix includes a first sub-black matrix extending along a first direction and a second sub-black matrix extending along a second direction, the first direction intersects with the second direction, and in a direction perpendicular to the light emitting surface of the display module, the curved portion at least partially overlaps with an edge of the first sub-black matrix, and / or the curved portion at least partially overlaps with an edge of the second sub-black matrix.

2. The display module according to claim 1, characterized in that: There is a gap between adjacent curved surface portions.

3. The display module according to claim 2, characterized in that: Along the first direction, adjacent second black sub-matrices include sub-pixel columns, and adjacent curved surface portions include at least one sub-pixel column along the first direction; And / or, adjacent first sub-black matrices include sub-pixel rows along the second direction, and adjacent curved surface portions include at least one sub-pixel row along the second direction.

4. The display module according to claim 1, characterized in that: The connection between two adjacent dimming units further includes a planar portion connected to the curved portion, and a side of the planar portion away from the interior of the dimming unit further includes diffusion particles.

5. The display module according to claim 4, characterized in that: In a direction perpendicular to the light emitting surface of the display module, the diffusion particles at least partially overlap with the first black matrix.

6. The display module according to claim 1, characterized in that: The orthographic projection of the curved surface on the first section is an arcuate shape, the radius of the arcuate shape is r, the width of the arcuate shape is w, wherein cos40°≤w / 2r≤cos60°, and the first section is perpendicular to the plane where the first display panel is located and passes through the center of the dimming unit.

7. The display module according to claim 1, characterized in that: The first display panel includes a first sub-pixel, the second display panel includes a second sub-pixel, the first black matrix surrounds the openings of the second sub-pixels, and in a direction perpendicular to the plane where the light emitting surface of the display module is located, the dimming unit at least partially overlaps with an opening of at least one of the second sub-pixels.

8. The display module according to claim 7, characterized in that: In a direction perpendicular to the plane where the light emitting surface of the display module is located, one of the second sub-pixels overlaps with at least one of the first sub-pixels.

9. The display module according to claim 1, characterized in that: The refractive index n1 of the light adjustment layer is obtained according to the following method: Among them, σ is the phase difference of the light emitted by the second display panel after passing through the light adjustment layer, λ is the wavelength of the light emitted by the second display panel, θ is the refraction angle of the light on the curved surface, and d is the thickness of the light adjustment layer in a direction perpendicular to the plane where the light emitting surface of the display module is located.

10. The display module according to claim 9, characterized in that: The refractive index of the light adjustment layer is between 1.4 and 1.

7.

11. The display module according to claim 1, characterized in that: The material of the light adjustment layer includes at least one of acrylic resin, polyester, polymethyl methacrylate, or polycarbonate.

12. The display module according to claim 1, characterized in that: The light adjustment layer and the first display panel are fixed by a first optical adhesive layer, and the light adjustment layer and the second display panel are fixed by a second optical adhesive layer.

13. A display device, characterized in that: The display module comprises any one of claims 1 to 12, and further comprises a backlight module located on a side of the display module away from a light emitting surface of the display module.

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