Display modules, terminal equipment

Abstract

An embodiment of the present application discloses a display module and a terminal device, wherein the display module includes a dimming layer located in the light emitting direction of the display panel, the display panel includes multiple sub-pixel units and a driving unit, any sub-pixel unit includes a first light emitting part and a second light emitting part which are arranged side by side and independent of each other, the first light emitting part and the second light emitting part are connected one-to-one with different driving units, the dimming layer includes a convex lens structure arranged corresponding to the first light emitting part and a concave lens structure arranged corresponding to the second light emitting part, by independently opening or closing the first light emitting part and the second light emitting part, the light emitting angle of the first light emitting part is small, and the light emitting angle of the second light emitting part is large, when the first light emitting part is opened and the second light emitting part is closed, the display module is in an anti-peeping state, and when the second light emitting part is opened, the display module is in a shared state, thereby realizing the switching of the display module between the anti-peeping state and the shared state.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a terminal device. Background Art

[0002] Anti-peeping technology has always been the focus of development in the display industry. Although there are many anti-peeping film products available, anti-peeping films can only achieve anti-peeping functions. If you want a screen to have both anti-peeping functions and the ability to switch to a shared state, anti-peeping films cannot achieve this effect. It is urgent to develop an anti-peeping technology that can achieve both anti-peeping effects and automatically switch to a shared state.

[0003] Therefore, the existing anti-peeping technology has a technical problem that it is difficult to switch the display module between the anti-peeping state and the sharing state. Summary of the Invention

[0004] The embodiments of the present application provide a display module and a terminal device, which can alleviate the technical problem of existing anti-peeping technology that it is difficult to switch the display module between an anti-peeping state and a shared state.

[0005] An embodiment of the present application provides a display module, comprising:

[0006] A display panel, the display panel comprising a plurality of sub-pixel units, each of the sub-pixel units comprising a first light emitting portion and a second light emitting portion having the same light emitting color;

[0007] A dimming layer, the dimming layer is arranged on the light-emitting side of the display panel, and the dimming layer includes a convex lens structure and a concave lens structure;

[0008] The first light emitting portion and the second light emitting portion are independently controlled, the convex lens structure is aligned with the first light emitting portion, and the concave lens structure is aligned with the second light emitting portion.

[0009] Optionally, in some embodiments of the present application, the dimming layer further includes a high-refractive index material layer and a low-refractive index material layer stacked together, the low-refractive index material layer being arranged on a side of the high-refractive index material layer away from the display panel, the refractive index of the high-refractive index material layer being greater than the refractive index of the low-refractive index material layer, and a first convex portion and a first concave portion being formed on a surface of the high-refractive index material layer facing the low-refractive index material layer, the first convex portion being aligned with the first light emitting portion, and the first concave portion being aligned with the second light emitting portion.

[0010] Optionally, in some embodiments of the present application, the display panel further includes a color resist and a black matrix arranged in the same layer, the high-refractive material layer and the low-refractive material layer contact each other to form a contact surface, the contact surface further includes a flat segment arranged flatly, and in the same longitudinal section, the vertical distance between the flat segment and the black matrix is ​​D, the width of any first light emitting portion is L, the width of the first convex portion arranged corresponding to the first light emitting portion is H, and the light emitting viewing angle is α, wherein α is less than or equal to actan[(HL) / (2*D)].

[0011] Optionally, in some embodiments of the present application, the first light emitting portion and the second light emitting portion in the same sub-pixel unit are independently controlled:

[0012] The first light emitting portion is lit alone, and the display panel is in an anti-peeping state;

[0013] The second light emitting portion is lit alone, and the display panel is in a low-brightness shared state;

[0014] The first light emitting portion and the second light emitting portion are both lit, and the display panel is in a high-brightness shared state.

[0015] Optionally, in some embodiments of the present application, the display panel includes a pixel unit, the pixel unit includes three sub-pixel units with different luminous colors, the sub-pixel unit is any one of a red sub-pixel, a blue sub-pixel, and a green sub-pixel, and the width of the first convex portion / the first concave portion is less than or equal to half of the spacing between adjacent pixel units.

[0016] Optionally, in some embodiments of the present application, in any pixel unit, the size of the first convex portion / first concave portion set corresponding to the blue sub-pixel is larger than the size of the first convex portion / first concave portion set corresponding to the red sub-pixel, and larger than the size of the first convex portion / first concave portion set corresponding to the green sub-pixel.

[0017] Optionally, in some embodiments of the present application, the refractive index of the high-refractive index material layer is in a range of 1.5 to 2.5, and the refractive index of the low-refractive index material layer is in a range of 1.3 to 1.6.

[0018] Optionally, in some embodiments of the present application, the size of the first light exit portion is smaller than the size of the convex lens structure, and the size of the second light exit portion is smaller than the size of the concave lens structure.

[0019] Optionally, in some embodiments of the present application, the convex lens structure is provided corresponding to one or more of the first light emitting portions, and the concave lens structure is provided corresponding to one or more of the second light emitting portions.

[0020] An embodiment of the present application provides a terminal device, which includes the display module as described in any of the above embodiments.

[0021] Beneficial effect: By dividing any sub-pixel into a first light emitting part and a second light emitting part which are independent of each other, a convex lens structure with a focusing effect is provided in the light emitting direction of the first light emitting part, and a concave lens structure for diverging light is provided in the light emitting direction of the second light emitting part, so that the first light emitting part and the second light emitting part can be opened or closed independently. When the first light emitting part is opened and the second light emitting part is closed, the display module is in an anti-peeping state. When the second light emitting part is opened, the display module is in a shared state, thereby realizing the switching of the display module between the anti-peeping state and the shared state, alleviating the technical problem of the existing anti-peeping technology that it is difficult to switch the display module between the anti-peeping state and the shared state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a cross-sectional schematic diagram of a display module provided in this application;

[0024] Figure 2 This is the first optical path schematic diagram in the display module provided by this application;

[0025] Figure 3 This is a second optical path schematic diagram in the display module provided by this application;

[0026] Figure 4 This is a first top view schematic diagram of the pixel unit and lens structure in the display module provided by the present application;

[0027] Figure 5 This is a second top view schematic diagram of the pixel unit and lens structure in the display module provided by the present application;

[0028] Figure 6 This is a schematic diagram comparing the viewing angle range and brightness of the display module provided in this application under different conditions.

[0029] Description of reference numerals:

[0030]

[0031] DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0033] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise expressly limited.

[0034] See also Figure 1 The display module provided in the present application includes a backlight module 1, a display panel 2, and a dimming layer 30. The display panel 2 includes a plurality of sub-pixel units and a driving unit. Any of the sub-pixel units includes a first light output portion 60 and a second light output portion 70 that are independent of each other. The first light output portion 60 and the second light output portion 70 are connected one-to-one with different driving units. The dimming layer 30 includes a convex lens structure and a concave lens structure arranged side by side. The first light output portion 60 and the second light output portion 70 are connected one-to-one with different driving units. The convex lens structure is arranged in alignment with the first light output portion 60, and the concave lens structure is arranged in alignment with the second light output portion 70.

[0035] In this embodiment, any sub-pixel is divided into a first light emitting portion 60 and a second light emitting portion 70 that can be independently lit or turned on or off, a convex lens structure with a focusing effect is provided in the light emitting direction of the first light emitting portion 60, and a concave lens structure for diverging light is provided in the light emitting direction of the second light emitting portion 70. When the first light emitting portion 60 is turned on and the second light emitting portion 70 is closed, the display module is in an anti-peeping state, and when the second light emitting portion 70 is turned on, the display module is in a shared state, thereby realizing the switching of the display module between the anti-peeping state and the shared state.

[0036] The technical solution of this application is now described in conjunction with specific embodiments.

[0037] The width, refractive index, contour shape, selected materials, etc. of this application are only described in terms of the best or preferred implementation methods. Other methods that can meet the conditions required for switching between the anti-peep state and the shared state should also fall within the scope of protection of the present invention and will not be repeated here.

[0038] In one embodiment, the first light emitting portion and the second light emitting portion of the same sub-pixel unit are arranged adjacent to each other.

[0039] In one embodiment, a pixel unit includes multiple sub-pixel units. Within the same pixel unit, the first light emitting portion and the second light emitting portion of the same sub-pixel unit may be spaced apart by the first light emitting portion / second light emitting portion of at least one other sub-pixel unit.

[0040] It can be understood that since the first light emitting portion and the second light emitting portion of each sub-pixel unit are independently controlled, the first light emitting portion and the second light emitting portion of each sub-pixel unit can be mixed and arranged, and when the pixel unit emits light, they are independently turned on and do not affect each other.

[0041] In one embodiment, see Figure 1 The dimming layer 30 further includes a stacked high-refractive index material layer 301 and a low-refractive index material layer 302. The low-refractive index material layer 302 is disposed on a side of the high-refractive index material layer 301 away from the display panel 2. The refractive index of the high-refractive index material layer 301 is greater than the refractive index of the low-refractive index material layer 302. A first convex portion 303 and a first concave portion 304 are formed on a surface of the high-refractive index material layer 301 facing the low-refractive index material layer 302. The first convex portion 303 is aligned with the first light output portion 60, and the first concave portion 304 is aligned with the second light output portion 70.

[0042] Among them, a first convex portion 303 with a focusing function is provided in the light emitting direction of the first light emitting portion 60, and a first concave portion 304 for diverging light is provided in the light emitting direction of the second light emitting portion 70. The first convex portion 303 acts as a part of the convex lens structure, and the first concave portion 304 acts as a part of the concave lens structure.

[0043] In one embodiment, see Figure 1 、 Figure 2 The display panel 2 also includes a color resist and a black matrix 204 arranged in the same layer. The contact surface also includes a flat segment arranged flatly. The vertical distance between the flat segment and the black matrix 204 is D. The width of any first light exit portion 60 is L. The width of the first convex portion 303 corresponding to the first light exit portion 60 is H. The light exit viewing angle is α, where α is less than or equal to actan[(HL) / (2*D)].

[0044] The color resist includes a red color resist 201 corresponding to the red sub-pixel, a blue color resist 202 corresponding to the blue sub-pixel, and a green color resist 203 corresponding to the green sub-pixel.

[0045] The color resist and the black matrix 204 are arranged in the same layer to form a color filter layer 20. The display panel 2 includes a display area and a non-display area. The sub-pixel units are arranged in the display area. The color filter layer 20 is arranged in a concave-convex manner in the display area corresponding to the sub-pixel units, and is arranged flat in the non-display area. The contact surface between the high-refractive material layer 301 and the low-refractive material layer 302 in the non-display area is the flat section.

[0046] The display panel 2 further includes an array substrate 10 , which is disposed between the color filter layer 20 and the backlight module 1 .

[0047] The light output viewing angle is positively correlated with the difference between the width H of the first convex portion 303 and the width L of the first light output portion 60 , and is negatively correlated with the vertical distance D between the flat section and the black matrix 204 .

[0048] In one embodiment, see Figure 2 、 Figure 3 The light emitted by the first light emitting portion 60 is emitted after being converged by the first convex portion 303 , and the light emitted by the second light emitting portion 70 is emitted after being diffused by the first concave portion 304 .

[0049] In one embodiment, see Figure 2 The light output viewing angle and the vertical distance D between the flat segment and the black matrix 204 range from 10 micrometers to 300 micrometers, and the viewing angle range of α is 0 to 60°.

[0050] When the light output viewing angle is greater than 60°, it is necessary to satisfy that the brightness of the light with a light output viewing angle greater than 60° is less than 1%.

[0051] In one embodiment, the backlight source includes a light-collecting film or an inverse prism.

[0052] The light-receiving film includes a light-receiving element, and the outline shape of the light-receiving element is a pyramid with an angle of 45 degrees.

[0053] In one embodiment, the first light emitting portion and the second light emitting portion in the same sub-pixel unit are independently controlled:

[0054] The first light emitting portion is lit alone, and the display panel is in an anti-peeping state;

[0055] The second light emitting portion is lit alone, and the display panel is in a low-brightness shared state;

[0056] The first light emitting portion and the second light emitting portion are both lit, and the display panel is in a high-brightness shared state.

[0057] Among them, when the display module is in the anti-peep state, the first light output portion 60 emits light and the second light output portion 70 is turned off; when the display module is in the high-brightness sharing state, the first light output portion 60 and the second light output portion both emit light; when the display module is in the low-brightness sharing state, the first light output portion 60 is turned off and the second light output portion 70 emits light.

[0058] It can be understood that the sharing state of the display module includes a high-brightness sharing state and a low-brightness sharing state. In the high-brightness sharing state, the first light emitting portion 60 and the second light emitting portion 70 both emit light. The light from the first light emitting portion 60 is converged and focused by the first convex portion 303 and then emitted from the front. The light from the first light emitting portion 60 has a small light emitting viewing angle and is only used to increase the light emitting brightness. The light from the second light emitting portion 70 is diffused by the first concave portion 304, and has a larger light emitting viewing angle, thereby achieving both a large light emitting viewing angle and a high light emitting brightness.

[0059] It can be understood that when the brightness is not required to be too high but a shared state is required, the first light emitting part 60 can be turned off and only the second light emitting part 70 emits light. Compared with the high-brightness shared state, since the first light emitting part 60 does not emit light, it is suitable for a shared state with lower brightness requirements and can reduce power consumption.

[0060] In one embodiment, see Figure 4 、 Figure 5 The display panel 2 includes a pixel unit, which includes three sub-pixel units with different luminous colors. The sub-pixel unit is any one of a red sub-pixel, a blue sub-pixel, and a green sub-pixel. The width of the first convex portion 303 / the first concave portion 304 is less than or equal to half of the spacing between adjacent pixel units.

[0061] The three sub-pixel units with different luminous colors include a red sub-pixel, a blue sub-pixel, and a green sub-pixel.

[0062] The light-emitting area of ​​the blue sub-pixel is larger than the light-emitting area of ​​the red sub-pixel, which is larger than the light-emitting area of ​​the green sub-pixel.

[0063] The distance between adjacent pixel units may range from 40 micrometers to 400 micrometers.

[0064] It can be understood that by limiting the width of the first convex portion 303 and the first concave portion 304 to be less than or equal to 1 / 2 of the spacing between adjacent pixel units, the first convex portion 303 and the first concave portion 304 can achieve a better refraction effect on light.

[0065] In one embodiment, the surface of the low-fold material layer 302 facing the high-fold material layer 301 includes a second convex portion and a second concave portion, the first convex portion 303 is aligned with and interlocked with the second concave portion, and the second convex portion is aligned with and interlocked with the first concave portion 304.

[0066] The entire low-refractive material layer 302 is disposed on a side of the high-refractive material layer 301 away from the backlight module 1. A second concave portion and a second convex portion are formed on a surface of the low-refractive material layer 302 facing the high-refractive material layer 301, which have complementary contours to the first convex portion 303 and the first concave portion 304. The first convex portion 303, the first concave portion 304, the second convex portion, and the second concave portion can be formed by embossing or printing processes. The first convex portion 303 and the first concave portion 304 can be made of different materials and can be made separately or simultaneously. The second convex portion and the second concave portion can be made of different materials and can be made separately or simultaneously.

[0067] It can be understood that, at the contact surface between the low-refractive material layer 302 and the high-refractive material layer 301 , the light can be converged at the first convex portion 303 and the light can be diffused at the first concave portion 304 .

[0068] In one embodiment, in any pixel unit, the size of the first convex portion 303 / first concave portion 304 corresponding to the blue sub-pixel is larger than the size of the first convex portion 303 / first concave portion 304 corresponding to the red sub-pixel, and larger than the size of the first convex portion 303 / first concave portion 304 corresponding to the green sub-pixel.

[0069] It can be understood that since the area of ​​the blue sub-pixel is larger than the area of ​​the red sub-pixel, which is larger than the area of ​​the green sub-pixel, the sizes of the corresponding first convex portion 303 and the first concave portion 304 should match the area of ​​the corresponding sub-pixel, so that the light emitted by each sub-pixel can be well received and refracted by the first convex portion 303 and the first concave portion 304 on the dimming layer 30.

[0070] In one embodiment, the size of the first light exit portion is smaller than the size of the convex lens structure, and the size of the second light exit portion is smaller than the size of the concave lens structure.

[0071] In one embodiment, the convex lens structure is provided corresponding to one or more first light exiting portions, and the concave lens structure is provided corresponding to one or more second light exiting portions.

[0072] When the outline shape of the first convex portion 303 is cylindrical, the first convex portion 303 may be provided corresponding to a plurality of the first light emitting portions.

[0073] When the contour shape of the first convex portion 303 is hemispherical, the first convex portion 303 is provided corresponding to one of the first light emitting portions.

[0074] In one embodiment, the cross-sectional shapes of the first convex portion 303 and the first concave portion 304 are both arc-shaped.

[0075] In one embodiment, see Figure 4 、 Figure 5 The contour shape of the first protrusion 303 is any one of a hemispherical shape and a cylindrical shape, and the side surface of the cylindrical shape is the contact surface.

[0076] Among them, Figure 4 The outline shape of the first convex portion 303 is hemispherical, as shown in FIG. Figure 5 The first protrusion 303 has a cylindrical outline.

[0077] The first recess 304 also has a hemispherical or cylindrical outline.

[0078] In one embodiment, the refractive index of the high-refractive index material layer 301 ranges from 1.5 to 2.5, and the refractive index of the low-refractive index material layer 302 ranges from 1.3 to 1.6.

[0079] The refractive index of the high-refractive index material layer 301 may be any one of 1.5, 1.8, 2.1, 2.3, and 2.5, and the refractive index of the low-refractive index material layer 302 may be any one of 1.3, 1.4, 1.5, and 1.6.

[0080] In one embodiment, see Figure 6 After the first light emitting portion 60 collects light through the convex lens structure, the brightness of the light from the first light emitting portion 60 is reduced to less than 5% within the range of a light emitting viewing angle greater than 30°, and the brightness of the light from the first light emitting portion 60 is reduced to less than 1% within the range of a light emitting viewing angle greater than 35°; after the second light emitting portion 70 expands light through the concave lens structure.

[0081] in, Figure 6 A, B, and C represent the light not passing through the lens structure, the light passing through the concave lens structure, and the light passing through the convex lens structure, respectively. Among them, A represents the light not passing through the lens structure, B represents the light passing through the concave lens structure, and C represents the light passing through the convex lens structure.

[0082] Among them, see Figure 6 It can be seen that compared with the light not passing through the lens structure, the light from the first light emitting portion 60 is converged by the convex lens structure, the light emitting viewing angle range becomes smaller, and the brightness within the small viewing angle range is enhanced.

[0083] Among them, see Figure 6 It can be seen that when the light passes through the concave lens structure, compared with the light not passing through the lens structure, the light from the second light emitting portion 70 is diffused by the concave lens structure, and the light emitting viewing angle range becomes larger.

[0084] Among them, see Figure 6When the light from the second light emitting portion 70 has a light emitting viewing angle of about 60°, the brightness thereof is about 20%.

[0085] In one embodiment, the display panel 2 is a liquid crystal display panel 2, which includes liquid crystal molecules, a first electrode and a second electrode located on both sides of the liquid crystal molecules, and at least one of the first electrode and the second electrode is arranged in alignment with the first light emitting portion 60 and the second light emitting portion 70.

[0086] It can be understood that by adjusting the voltage difference between the first electrode and the second electrode arranged opposite to the first light emitting portion 60, the liquid crystal molecules arranged corresponding to the first light emitting portion 60 are opened or closed, thereby controlling the first light emitting portion 60 to be opened or closed, and by adjusting the voltage difference between the first electrode and the second electrode arranged opposite to the second light emitting portion 70, the liquid crystal molecules arranged corresponding to the second light emitting portion 70 are opened or closed, thereby controlling the second light emitting portion 70 to be opened or closed.

[0087] In one embodiment, a cover plate 40 and a polarizer 50 are further provided on the side of the dimming layer 30 away from the display panel 2 .

[0088] The present application is to respectively provide a first light emitting portion 60 and a second light emitting portion 70 of the same light-emitting color for any sub-pixel, and the first light emitting portion 60 and the second light emitting portion 70 are independently turned on or off, and a convex lens structure for focusing light is correspondingly provided in the light emitting direction of the first light emitting portion 60, and a concave lens structure for diffusing light is correspondingly provided in the light emitting direction of the second light emitting portion 70, so that the light emitted by the first light emitting portion 60 converges and has a small light emitting angle, and the light emitted by the second light emitting portion 70 diffuses and has a large light emitting angle. When the first light emitting portion 60 emits light, the second light emitting portion 70 emits light. When the second light emitting portion 70 is closed, the light emitting viewing angle of the display module is small, and the display module is in an anti-peeping state. When the second light emitting portion 70 is opened, the light emitting viewing angle of the second light emitting portion 70 is large after diffusion, and the display module is in a sharing state. The sharing state includes a high-brightness sharing state and a low-brightness sharing state. When the display module is in the high-brightness sharing state, the first light emitting portion 60 is also opened to enhance the front light output. When the display module is in the low-brightness sharing state, the first light emitting portion 60 is closed, and only the second light emitting portion 70 emits light. At this time, the light brightness is lower than that in the high-brightness sharing state.

[0089] The present application also proposes a terminal device, which includes the above-mentioned display module. The terminal device includes but is not limited to a mobile phone, a laptop computer, and a tablet computer.

[0090] The display module provided by the embodiments of the present application includes a backlight module, a display panel, and a dimming layer. The display panel includes a plurality of sub-pixel units and a driving unit. Any of the sub-pixel units includes a first light exit portion and a second light exit portion arranged side by side and independent of each other. The first light exit portion and the second light exit portion are connected to different driving units in a one-to-one correspondence. The dimming layer includes a convex lens structure and a concave lens structure arranged side by side. The first light exit portion and the second light exit portion are connected to different driving units in a one-to-one correspondence. The convex lens structure is arranged in alignment with the first light exit portion, and the concave lens structure is arranged in alignment with the second light exit portion. By dividing any sub-pixel into a first light exit portion and a second light exit portion that can be independently lit or turned off, a convex lens structure for focusing light is provided in the light exit direction of the first light exit portion, and a concave lens structure for diverging light is provided in the light exit direction of the second light exit portion. When the first light exit portion is turned on and the second light exit portion is turned off, the display module is in an anti-peeping state, and when the second light exit portion is turned on, the display module is in a shared state, thereby achieving switching of the display module between the anti-peeping state and the shared state.

[0091] The display panel provided by the embodiments of the present application is described in detail above. Without departing from the spirit and essential points of the present application, those skilled in the art may make various corresponding changes and modifications based on the present application, and such corresponding changes and modifications shall fall within the scope of protection of the claims attached to the present application.

Claims

1. A display module, characterized in that: include: A display panel, the display panel comprising a plurality of sub-pixel units, each of the sub-pixel units comprising a first light emitting portion and a second light emitting portion having the same light emitting color; A dimming layer, the dimming layer is arranged on the light-emitting side of the display panel, and the dimming layer includes a convex lens structure and a concave lens structure; Wherein, the first light exit portion and the second light exit portion are independently controlled, the convex lens structure is arranged in alignment with the first light exit portion, and the concave lens structure is arranged in alignment with the second light exit portion; The dimming layer further comprises a high-refractive index material layer and a low-refractive index material layer stacked and having different refractive indices, and a first convex portion is formed on a side of the high-refractive index material layer facing the low-refractive index material layer and aligned with the first light emitting portion; The display panel further includes a color resist and a black matrix arranged in the same layer. The high-refractive material layer and the low-refractive material layer contact each other to form a contact surface. The contact surface further includes a flat segment. In the same longitudinal section, a vertical distance between the flat segment and the black matrix is ​​D. The width of any first light-emitting portion is L. The width of the first convex portion corresponding to the first light-emitting portion is H. The light-emitting viewing angle is α, where α is less than or equal to actan[(HL) / (2×D)].

2. The display module according to claim 1, wherein: The low-refractive material layer is arranged on a side of the high-refractive material layer away from the display panel. The refractive index of the high-refractive material layer is greater than the refractive index of the low-refractive material layer. A first concave portion is formed on a surface of the high-refractive material layer facing the low-refractive material layer. The first concave portion is arranged in alignment with the second light exit portion.

3. The display module according to claim 1, wherein: The first light emitting portion and the second light emitting portion in the same sub-pixel unit are independently controlled: The first light emitting portion is lit alone, and the display panel is in an anti-peeping state; The second light emitting portion is lit alone, and the display panel is in a low-brightness shared state; The first light emitting portion and the second light emitting portion are both lit, and the display panel is in a high-brightness shared state.

4. The display module according to claim 2, wherein: The display panel includes a pixel unit, which includes three sub-pixel units with different luminous colors. The sub-pixel unit is any one of a red sub-pixel, a blue sub-pixel, and a green sub-pixel. The width of the first convex portion / the first concave portion is less than or equal to half of the spacing between adjacent pixel units.

5. The display module according to claim 4, wherein: In any pixel unit, the size of the first convex portion / first concave portion corresponding to the blue sub-pixel is larger than the size of the first convex portion / first concave portion corresponding to the red sub-pixel, and larger than the size of the first convex portion / first concave portion corresponding to the green sub-pixel.

6. The display module according to claim 1, wherein: The refractive index of the high-refractive index material layer ranges from 1.5 to 2.5, and the refractive index of the low-refractive index material layer ranges from 1.3 to 1.

6.

7. The display module according to claim 1, wherein: The size of the first light exit portion is smaller than that of the convex lens structure, and the size of the second light exit portion is smaller than that of the concave lens structure.

8. The display module according to claim 1, wherein: The convex lens structure is arranged corresponding to one or more first light exiting portions, and the concave lens structure is arranged corresponding to one or more second light exiting portions.

9. A terminal device, characterized in that: The terminal device includes the display module according to any one of claims 1 to 8.

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