Display module, display screen, electronic equipment and display control method

Abstract

The invention relates to a display module, a display screen, electronic equipment and a display control method. The display module comprises a light emitting layer, an optical modulation layer and a light shielding layer. The light-emitting layer comprises a plurality of pixel units; the optical modulation layer is arranged on the light-emitting side of the light-emitting layer and used for adjusting light emitted by the pixel units. The light shielding layer is arranged on the light emitting side of the light emitting layer, and the orthographic projection of the light shielding layer on the light emitting layer surrounds at least part of the pixel units. According to the display module, the anti-peeping function is achieved, and meanwhile the influence of the shading layer on the light emitting efficiency and the display quality of the display module is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display module, a display screen, an electronic device and a display control method. Background Art

[0002] With the rapid development of display technology, different types of display modules such as OLED screens are widely used in electronic devices such as smartphones, tablets, and e-readers. Among them, display modules equipped with anti-peeping films have emerged. The anti-peeping films block large-angle light to achieve anti-peeping functions, thereby improving the safety of electronic devices. However, in traditional display modules, the setting of anti-peeping films easily leads to the deterioration of the light output efficiency and display quality of the display modules, affecting the user experience. Summary of the invention

[0003] The embodiments of the present application provide a display module, a display screen, an electronic device and a display control method to solve the problem that the provision of an anti-peeping film easily leads to deterioration of the light output efficiency and display quality of the display module.

[0004] A display module, comprising:

[0005] A light-emitting layer including a plurality of pixel units;

[0006] an optical modulation layer, disposed on the light-emitting side of the light-emitting layer and used to adjust the light emitted by the pixel unit; and

[0007] The light shielding layer is arranged on the light-emitting side of the light-emitting layer, and the orthographic projection of the light shielding layer on the light-emitting layer surrounds at least a part of the pixel unit.

[0008] A display screen comprises a cover plate and the display module as described above, wherein the cover plate is arranged on a side of the optical modulation layer facing away from the light-emitting layer.

[0009] An electronic device comprises a middle frame and the display screen as described above, wherein the display screen is arranged on the middle frame.

[0010] A display control method for controlling the display state of a display module, wherein the display module comprises a light-emitting layer and a light-shielding layer, wherein the light-emitting layer comprises a plurality of first pixel units arranged in an array, and a plurality of second pixel units arranged in an array together with the first pixel units, wherein the orthographic projection of the light-shielding layer on the light-emitting layer is staggered with an area corresponding to the second pixel unit and surrounds the first pixel unit, wherein the display control method comprises:

[0011] Control the switches of the first pixel unit and the second pixel unit so that the display module can switch between the first display state and the second display state, wherein in the first display state, the first pixel unit is turned on and at least part of the second pixel unit is turned off, and in the second display state, the first pixel unit and the second pixel unit are both turned on.

[0012] The above display module, by providing a light shielding layer around at least part of the pixel units, can shield part of the light emitted by the pixel units around the surrounded pixel units, thereby increasing the brightness attenuation of the light beam emitted by the pixel units surrounded by the light shielding layer at the edge, making it difficult to see the light emitted by the pixel units in a wide-angle field of view, and can achieve an anti-peeping function. In addition, by replacing the traditional anti-peeping film with the light shielding layer, the hollow part of the light shielding layer will not affect the normal light emission of the pixel units, which is conducive to reducing the influence of the light shielding layer on the display quality while achieving the anti-peeping function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 Schematic diagram of the structure of electronic equipment in some embodiments.

[0015] Figure 2 It is a schematic diagram of the structure of the display module in some embodiments.

[0016] Figure 3 Graph showing brightness attenuation curves of pixel units in some embodiments.

[0017] Figure 4 Graph showing brightness attenuation curves corresponding to different opening radii of pixel units in some embodiments.

[0018] Figure 5 Schematic diagram of an array of pixel units in some embodiments.

[0019] Figure 6 FIG. 4 is a schematic diagram of the structure of the display module corresponding to the second pixel unit in some embodiments.

[0020] Figure 7 FIG. 4 is a schematic diagram of an array in which only the first pixel unit is turned on in some embodiments.

[0021] Figure 8Schematic diagram of an array in which the first pixel unit and the second pixel unit are turned on in some embodiments.

[0022] Fig. 9 FIG. 4 is a schematic diagram of the structure of a display module provided with a color filter film in some embodiments.

[0023] Fig.10 FIG. 4 is a schematic diagram of the structure of a display module provided with a microlens array layer in some embodiments.

[0024] Fig.11 Schematic diagram of the relative relationship among the first pixel unit, the microlens portion and the light shielding matrix in some embodiments.

[0025] Fig.12 Schematic diagram of the structure of a display module provided with a microlens array layer in some other embodiments.

[0026] Fig.13 Schematic diagram of the structure of a display module provided with a microlens array layer and a color filter film in some embodiments.

[0027] Fig.14 It is a schematic diagram of the structure of the electronic device including other components in some embodiments.

[0028] Reference numerals:

[0029] 10. Electronic device; 11. Middle frame; 20. Display module; 21. Substrate; 22. Buffer layer; 23. Planarization layer; 24. Light-emitting layer; 241. Pixel unit; 2411. First pixel unit; 2412. Second pixel unit; 25. Encapsulation layer; 251. Inorganic layer; 252. Organic layer; 26. Touch layer; 27. Adhesion layer; 28. Optical modulation layer; 281. Color filter layer; 2811. Color filter structure; 282. Black matrix layer; 29. ​​Shading layer; 291. Shading matrix; 292. Transparent bonding structure; 31. Microlens array layer; 311. Microlens part; 3111. First surface; 312. Refractive layer. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0031] As used herein, "electronic device" refers to a device that can receive and / or send communication signals, including but not limited to a device that is connected via any one or more of the following connection methods:

[0032] (1) Connection via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection;

[0033] (2) Via wireless interfaces, such as cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, and AM-FM broadcast transmitters.

[0034] An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0035] (1) Satellite phone or cellular phone;

[0036] (2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communications capabilities;

[0037] (3) Radiotelephone, pager, Internet / Intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0038] (4) conventional laptop and / or handheld receivers;

[0039] (5) Conventional laptop and / or palmtop radio telephone transceivers, etc.

[0040] See also Figure 1 and Figure 2 , Figure 1 and Figure 2The schematic diagrams of the structures of the electronic device 10 and the display module 20 in some embodiments of the present application are respectively shown. The display module 20 provided in the present application includes a light-emitting layer 24, and the light-emitting layer 24 includes a plurality of pixel units 241 arranged in an array. The pixel unit 241 may include three types of red light-emitting units, green light-emitting units and blue light-emitting units arranged in an array together, and may also include a combination of other three primary color light-emitting units. The pixel unit 241 can emit light so that the display module 20 has a display function. In the present application, the type of the display module 20 is not limited. When the display module 20 adopts different types, the material and structure of the pixel unit 241 may also be different. The type of the display module 20 includes but is not limited to any applicable type of display screen such as a liquid crystal display (LCD), an organic light-emitting diode (OLED) display screen, etc. In the embodiment of the present application, the OLED display screen is taken as an example, and the pixel unit 241 can be an organic light-emitting diode sub-pixel.

[0041] The display module 20 involved in this application can form a display screen with a cover plate (not shown) and be used in an electronic device 10. The cover plate includes but is not limited to a glass or plastic cover plate. The cover plate can serve as the outermost structural member of the display screen and adhere to the display module to provide protection for the display module. The electronic device includes but is not limited to any applicable electronic product such as a smartphone, a tablet computer, an e-reader, etc. This application takes a smartphone as an example of the electronic device 10. The electronic device 10 may include a middle frame 11 and a back plate. The display module 20 and the back plate are respectively arranged on opposite sides of the middle frame 11. Depending on the layout design of the electronic device 10, the size and structure of the display module 20 may also be different. For example, the electronic device 10 includes but is not limited to any applicable smartphone such as a water drop screen, a bangs screen, a hole screen, etc.

[0042] refer to Figure 2 As shown, in some embodiments, the display module 20 includes a substrate 21, a buffer layer 22, a planarization layer 23, a light-emitting layer 24, an encapsulation layer 25, a touch layer 26, an adhesion layer 27, an optical modulation layer 28 and a cover plate which are stacked in sequence. The material of the substrate 21 includes but is not limited to polyimide (PI), etc., the material of the buffer layer 22 includes but is not limited to silicon nitride (SiNx), silicon oxide (SiOx) or silicon oxynitride (SiOxNx), etc., and the material of the planarization layer 23 includes but is not limited to any applicable organic resin material. The encapsulation layer 25 can adopt TFT encapsulation technology, and the touch layer 26 can be provided with a touch sensing circuit for sensing the user's touch action. The adhesion layer 27 can be any applicable adhesion structure such as optical glue. The optical modulation layer 28 is used to adjust at least part of the light emitted by the pixel unit 241 and then emit it to meet different display requirements. The optical modulation layer 28 includes but is not limited to polarizers or color filters.

[0043] Of course, the above is only an example of the layer structure of the display module 20 in one embodiment. The display module 20 may also include any other applicable layer structure to achieve richer functions. The layer structure involved above may also be omitted or replaced by other layer structures that can achieve corresponding functions. The arrangement order of the above layer structures may also be adjusted according to needs. In the present application, the description of the stacking arrangement of two layer structures includes the two layer structures being stacked in contact, the two layer structures being stacked with an intermediate layer structure between them, and the two layer structures being stacked with a space gap between them.

[0044] Further, refer to Figure 2 As shown, in some embodiments, the display module 20 further includes a light shielding layer 29, which is disposed on the light-emitting side of the light-emitting layer 24, for example, stacked between the adhesive layer 27 and the touch layer 26, or stacked between any two applicable layer structures on the side of the light-emitting layer 24 facing the optical modulation layer 28. The light shielding layer 29 includes a light shielding matrix 291, and the positive projection of the light shielding matrix 291 on the light-emitting layer 24 surrounds at least part of the pixel unit 241. The material of the light shielding matrix 291 includes but is not limited to any applicable material that can absorb or block light, such as ink, black resin, chromium, molybdenum, etc. It can be understood that since the light beam emitted by the pixel unit 241 is divergent, the closer the light is to the edge of the light beam, the greater the divergence angle is, and the light shielding matrix 291 surrounds at least part of the pixel unit 241, the light shielding matrix 291 can absorb part of the light at the edge of the light beam emitted by the pixel unit 241 surrounded by the light shielding matrix 291, thereby increasing the edge brightness attenuation of the light beam emitted by the pixel unit 241 and reducing the edge brightness.

[0045] The above-mentioned display module 20 is provided with a shading matrix 291 surrounding at least part of the pixel unit 241. The shading matrix 291 can block part of the light emitted by the pixel unit 241 around the surrounded pixel unit 241, thereby increasing the brightness attenuation of the light beam emitted by the pixel unit 241 surrounded by the shading matrix 291 at the edge, making it difficult to see the light emitted by the pixel unit 241 in a large-angle field of view, and realizing the anti-peeping function. In addition, by replacing the traditional anti-peeping film with the shading layer 29, the hollow part of the shading matrix 291 will not affect the normal light emission of the pixel unit 241, which is conducive to reducing the influence of the shading matrix 291 on the display quality of the display module 20 while realizing the anti-peeping function. The setting of the shading layer 29 can also adapt to display modules 20 with different designs such as curved screens, avoiding the influence of different structural designs of the display module 20 on the applicability of the anti-peeping film. The light-shielding layer 29 is used to replace the anti-peeping film. The process is simple and it is also beneficial to compress the thickness of the display module 20, which is conducive to the realization of miniaturized design. Compared with the traditional anti-peeping film, the light-shielding layer 29 has a lower impact on the light output efficiency, which is also beneficial for the display module 20 to maintain good light output efficiency.

[0046] Combination Figure 2 and Figure 3 As shown, in some embodiments, the opening radius of the pixel unit 241 is 4um-15um, for example, it can be 5um, 10um or 15um. In some embodiments, the distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening contour of the pixel unit 241 surrounded by the shading matrix 291 ranges from 0 to 6um. When the above value is 0, it can be regarded that the partial contour of the orthographic projection of the shading matrix 291 on the light-emitting layer 24 coincides with the opening contour of the pixel unit 241. It should be noted that the distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the pixel unit 241 surrounded by the shading matrix 291 can be understood as the distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening contour of the pixel unit 241 in the radial direction of the pixel unit 241. Figure 3 The figure shows the effect of the setting of the shading layer 29 on the brightness attenuation of the pixel units 241 surrounded by the shading layer 29 when the vertical distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening contour of the pixel units 241 surrounded by the shading matrix 291 remains unchanged in some embodiments. The horizontal axis represents the field of view angle, the vertical axis represents the ratio of the light intensity of the corresponding field of view angle to the brightness of the central field of view light (main light), and different curves represent the cases when the shading layer 29 is not set and when the shading layer 29 is set when the pixel opening radius is 5um, and the cases when the shading layer 29 is not set and when the shading layer 29 is set when the pixel opening radius is 10um. Figure 3It can be seen that the setting of the light shielding layer 29 can increase the brightness attenuation of the light at a large viewing angle (for example, greater than 35°) of the pixel unit 241, thereby effectively realizing the anti-peeping function, and the smaller the opening radius of the pixel unit 241, the more obvious the effect of the light shielding layer 29 on increasing the brightness attenuation. Therefore, by adjusting the vertical distance between the light shielding matrix 291 and the corresponding pixel unit 241, the anti-peeping effect of the display module 20 can be flexibly adjusted, with a large adjustment margin and simple design and preparation.

[0047] Combination Figure 2 and Figure 4 As shown, Figure 4 The figure shows the influence of the change of the vertical distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening outline of the pixel unit 241 surrounded by the shading matrix 291 on the brightness attenuation at a large viewing angle in some embodiments, wherein different curves respectively represent different values ​​of the vertical distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening outline of the pixel unit 241 surrounded by the shading matrix 291, the horizontal axis represents the viewing angle, and the vertical axis represents the brightness attenuation. Figure 4 It can be seen that the smaller the vertical distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening outline of the pixel unit 241 surrounded by the shading matrix 291, the more obvious the brightness attenuation at a large viewing angle is, and the better the anti-peeping effect is. The opening radius of the pixel unit 241 and the vertical distance between the orthographic projection of the shading matrix 291 on the light-emitting layer 24 and the opening outline of the pixel unit 241 surrounded by the shading matrix 291 can be set according to different anti-peeping requirements, and are not specifically limited in this application.

[0048] Combination Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, the light-emitting layer 24 includes a plurality of first pixel units 2411 arranged in an array, and a plurality of second pixel units 2412 arranged in an array together with the first pixel units 2411, and the orthographic projection of the shading matrix 291 on the light-emitting layer 24 is staggered with the area corresponding to the second pixel unit 2412, and surrounds the first pixel unit 2411. Figure 6 That is, it shows a schematic diagram of the structure of the display module 20 corresponding to the position of the second pixel unit 2412. The shading matrix 291 is staggered with the area where the second pixel unit 2412 is located, and the large-angle light emitted by the second pixel unit 2412 will not be blocked by the shading matrix 291, resulting in increased brightness attenuation. Figure 5 In the illustrated embodiment, the first pixel unit 2411 is indicated by a middle square that is not filled with color, and the second pixel unit 2412 is indicated by a square filled with a color such as red, green or blue.

[0049] Furthermore, combined with Figure 7 and Figure 8 As shown, in some embodiments, the display module 20 has a first display state and a second display state. In the first display state, the first pixel unit 2411 is turned on and the second pixel unit 2412 is turned off. In the second display state, both the first pixel unit 2411 and the second pixel unit 2412 are turned on. Therefore, in the first display state, the brightness of the turned-on pixel unit 241 is severely attenuated at a large viewing angle (for example, a viewing angle greater than 35°), which can achieve a good anti-peeping function. In the second display state, the number of turned-on pixel units 241 is greater, and the pixel density (PPI) of the display module 20 is greater, so that better display quality is achieved when anti-peeping is not required, meeting the use requirements of different scenes. It should be noted that in the present application, the description that a certain pixel unit 241 is turned on can be understood as the pixel unit 241 being activated or in a state where it can receive signals and is ready to work, for example, it means that the pixel unit 241 can receive data signals to determine the color and brightness of its display information. When a certain pixel unit 241 is turned on, the pixel unit 241 can emit light or not yet emit light, which is specifically set according to the requirements of the luminous pixels of the display screen.

[0050] In this embodiment, in the first display state, only the first pixel unit 2411 can be turned on to achieve a better anti-peeping effect. In other embodiments, in the first display state, some of the second pixel units 2412 may be turned on, and the number of the turned-on second pixel units 2412 in the first display state is less than that in the second display state. Therefore, in the first display state, some of the second pixel units 2412 can also play an auxiliary display function for the first pixel unit 2411, improve the PPI of the display module 20, so as to achieve the anti-peeping function while taking into account the improvement of display quality. In some embodiments, in the first display state, the light output brightness of the first pixel unit 2411 is less than the light output brightness of the first pixel unit 2411 in the second display state. By reducing the light output brightness of the first pixel unit 2411 in the first display state, the human eye's ability to distinguish large-angle light can be reduced, thereby further improving the anti-peeping effect. It should be noted that, relative to the second display state, the means for reducing the light output brightness of the first pixel unit 2411 in the first display state include but are not limited to reducing the light output efficiency of the first pixel unit 2411 in the first display state, and the means for reducing the light output efficiency of the first pixel unit 2411 in the first display state include but are not limited to reducing the current or voltage applied to the first pixel unit 2411, changing the working state of the thin film transistor in the first pixel unit 2411, using pulse width modulation, and any other applicable adjustment methods.

[0051] It should be noted that the array of pixel units 241 that can be turned on in the first display state and the second display state of the display module 20 can independently realize the display function, so that the display module 20 can meet the display requirements in different display states. Figure 5 , Figure 7 and Figure 8 Only the type and arrangement matrix of the pixel unit 241 of the display module 20 in one embodiment are illustrated. In fact, the pixel unit 241 can adopt any applicable three-primary color light-emitting unit and form any applicable arrangement array. As long as the pixel units 241 that can be turned on in the first display state and the second display state of the display module 20 can meet the realization of the display function, the arrangement matrix of the pixel unit 241 is not specifically limited in the present application.

[0052] exist Figure 2 and Figure 6 In the embodiment shown, a polarizer is used as an example of the optical modulation layer 28. Fig. 9 As shown, in some embodiments, the optical modulation layer 28 can also be a color filter film, and the optical modulation layer 28 includes a color filter layer 281 and a black matrix layer 282 arranged in the same layer, and the color filter layer 281 includes a plurality of color filter structures 2811 arranged in an array, and the color filter structure 2811 is arranged relative to the pixel unit 241 in a one-to-one correspondence. For example, the color filter structure 2811 may include a red color resistance relative to the red light emitting unit, a green color resistance relative to the green light emitting unit, and a blue color resistance relative to the blue light emitting unit. The black matrix layer 282 surrounds the color filter structure 2811, and the orthographic projection of the black matrix layer 282 on the shading layer 29 coincides with the shading matrix 291. The material of the black matrix layer 282 can be designed with reference to the material of the shading layer 29, as long as it can block the light. By Fig. 9 It can be seen that a shading layer 29 is provided in the display module 20 in which a color filter film is provided as the optical modulation layer 28. The black matrix of the shading layer 29 can cooperate with the black matrix layer 282 of the optical modulation layer 28 to block part of the wide-angle light at the same time, thereby facilitating further increasing the brightness attenuation of the wide-angle light and improving the anti-peeping effect of the display module 20.

[0053] In the embodiments shown in the drawings of the present application, the light shielding layer 29 is stacked between the optical modulation layer 28 and the light emitting layer 24, for example, stacked between the adhesive layer 27 and the touch layer 26. Of course, the touch layer 26 can also be arranged on the side of the optical modulation layer 28 facing away from the light emitting layer 24, and the optical modulation layer 28 can also be arranged between any other two applicable layer structures, as long as it can be located on the side of the light emitting layer 24 facing the optical modulation layer 28 to shield part of the light emitted by the pixel unit 241.

[0054] See also Fig.10 and Fig.11 As shown, in some embodiments, the display module 20 further includes a microlens array layer 31, which is disposed between the light shielding layer 29 and the light emitting layer 24, and includes a refractive layer 312 and a plurality of microlens portions 311 arranged in an array. The plurality of microlens portions 311 are disposed one-to-one with the plurality of pixel units 241, and the refractive layer 312 covers the microlens portion 311 on the side of the microlens portion 311 facing away from the light emitting layer 24. For example, the microlens portion 311 is disposed on the surface of the encapsulation layer 25 facing away from the light emitting layer 24, the refractive layer 312 is laid flat on the encapsulation layer 25 and covers the microlens portion 311, and the refractive layer 312 fills the gap between two adjacent microlens portions 311. The refractive index of the refractive layer 312 is different from the refractive index of the microlens portion 311, so that the microlens array layer 31 can converge at least part of the light emitted by the pixel unit 241. It can be understood that at least part of the light emitted by the pixel unit 241 passes through the microlens portion 311, the refractive layer 312 and the light shielding layer 29 in sequence and then exits the display module 20. The microlens array layer 31 is provided to cooperate with the light shielding layer 29, and the microlens array layer 31 can converge the light emitted by the pixel unit 241, reduce the divergence angle of the light beam, and reduce the brightness of the light with a large viewing angle, thereby reducing the light component blocked by the light shielding layer 29 and improving the brightness of the light emitted through the light shielding layer 29. Therefore, the microlens array layer 31 and the refractive layer 312 can cooperate to improve the overall display brightness and light output efficiency while realizing the anti-peeping function, optimize the energy consumption of the display module 20, and improve the display quality and service life of the display module 20.

[0055] It should be noted that in Fig.10 and Fig.11 In the illustrated embodiment, only the pixel units 241 surrounded by the shading matrix 291 are illustrated, and the microlens unit 311 can be set only corresponding to the pixel units 241 surrounded by the shading matrix 291, that is, corresponding to the first pixel unit 2411, so as to cooperate with the shading matrix 291 to optimize the light extraction efficiency and energy consumption of the display module 20 while achieving the anti-peeping effect. Of course, the microlens unit 311 can also be set corresponding to the first pixel unit 2411 and the second pixel unit 2412, wherein the microlens unit 311 set corresponding to the first pixel unit 2411 can cooperate with the shading matrix 291 to optimize the light extraction efficiency and energy consumption, and the microlens unit 311 set corresponding to the second pixel unit 2412 can reduce the divergence of light and improve the uniformity of light color, thereby improving the display quality of the display module 20, and the reduction of the light divergence is also conducive to the realization of the auxiliary anti-peeping function.

[0056] The structural arrangement and refractive index relationship between the refractive layer 312 and the microlens portion 311 are not limited, as long as the microlens array layer 31 can at least converge the light emitted by the first pixel unit 2411. Fig.10As shown, in some embodiments, the refractive index of the material of the refractive layer 312 is less than the refractive index of the material of the microlens portion 311, and the orthographic projection of the microlens portion 311 on the light-emitting layer 24 covers at least the first pixel unit 2411. It can be understood that in this embodiment, when the light is emitted from the microlens portion 311 to the refractive layer 312, that is, from the optically dense medium to the optically sparse medium, refraction occurs at the junction of the microlens portion 311 and the refractive layer 312, which can reduce the exit angle of the light, for example, reduce the angle between the light and the axis of the microlens portion 311, thereby achieving the effect of converging the light. The light focusing effect is achieved by cooperating with the refractive index of the microlens portion 311 and the refractive layer 312, rather than by reflecting the light. While focusing, the light can maintain good uniformity, which is conducive to improving the color uniformity of the light, thereby improving the color deviation phenomenon at a large angle viewing angle, for example, improving the color deviation phenomenon at a viewing angle of 45°-80°, balancing the colors at a small angle viewing angle and a large viewing angle, and is conducive to improving the display quality of the display module 20.

[0057] In some embodiments, when the microlens portion 311 is arranged corresponding to the first pixel unit 2411, the orthographic projection of the microlens portion 311 on the light-emitting layer 24 is between the orthographic projection of the light-shielding matrix 291 on the light-emitting layer 24 and the opening of the first pixel unit 2411. Thus, the microlens portion 311 and the light-shielding matrix 291 can form a good match, the microlens portion 311 can fully converge the light emitted by the first pixel unit 2411, and reduce the light blocked by the light-shielding matrix 291, effectively improving the light output efficiency of the display module 20, and at the same time, the light-shielding matrix 291 can also effectively improve the brightness attenuation of the light with a large viewing angle, and cooperate with the microlens portion 311 to converge the light to effectively realize the anti-peeping function.

[0058] In some embodiments, the side of the microlens portion 311 facing away from the light-emitting layer 24 is a convex surface. In other words, when the surface of the encapsulation layer 25 facing away from the light-emitting layer 24 and used to set the microlens portion 311 is a flat surface, the thickness of the middle part of the microlens portion 311 is greater than the thickness of the edge part. As a result, the microlens portion 311 is roughly in the shape of a convex lens, and the refractive index relationship between the microlens portion 311 and the refractive layer 312 is better matched to achieve a stronger light-gathering ability, thereby further reducing the probability of light hitting the shading matrix 291 and improving the brightness attenuation at a large angle, which is beneficial to reducing the power consumption of the display module 20 and achieving a better anti-peep screen design.

[0059] In some embodiments, the convex surface of the microlens portion 311 is defined as a first surface 3111, and the first surface 3111 includes a middle portion and a peripheral portion, and the peripheral portion is arranged around the periphery of the middle portion. The middle portion is substantially a plane, for example, substantially parallel to the light-emitting surface of the first pixel unit 2411, and the peripheral portion is an arc-shaped surface. Thus, while improving the focusing effect of the microlens portion 311, it is possible to effectively balance the incident angle and the exit angle of the large-angle light and the small-angle light, improve the uniformity of the light color, thereby improving the display quality of the display module 20, and improving the color shift phenomenon of the large-angle viewing angle. When the peripheral portion is an arc-shaped surface, when the microlens portion 311 is prepared by an etching process, a grayscale mask can be used for exposure processing, and different parts are controlled by the grayscale mask to have different exposure levels, for example, the closer the position to the edge, the higher or lower the exposure level, thereby forming a peripheral portion of the arc-shaped surface. Of course, the shape of the microlens portion 311 can also have any other applicable design, as long as it can cooperate with the refractive layer 312 to effectively converge the light.

[0060] refer to Fig.12 As shown, in other embodiments, the refractive index of the refractive layer 312 is greater than the refractive index of the microlens portion 311, and the orthographic projection of the microlens portion 311 on the light-emitting layer 24 surrounds the corresponding pixel unit 241, for example, only surrounds the first pixel unit 2411, or surrounds the first pixel unit 2411 and the second pixel unit 2412. It can be understood that in this embodiment, at least part of the large-angle light emitted by the pixel unit 241 hits the microlens array layer 31, and will first hit the refractive layer 312, and then hit the surface of the microlens portion 311, which can be regarded as from a light-dense medium to a light-sparse medium, which is conducive to reducing the critical angle of total reflection of the light on the surface of the microlens portion 311. Furthermore, since the light is incident on the outer surface of the microlens portion 311, the incident angle of the large-angle light on the microlens portion 311 is usually greater than the critical angle of total reflection. Therefore, it can be reflected by the outer surface of the microlens portion 311 and directed toward the shading layer 29, thereby achieving convergence of the large-angle light in the process of total reflection, which is also beneficial to reduce the light absorbed by the shading layer 29, thereby optimizing the light output efficiency and energy consumption of the display module 20 while achieving the anti-peeping effect.

[0061] In some embodiments, the inner contour of the orthographic projection of the microlens portion 311 on the light emitting layer 24 is between the orthographic projection of the light shielding matrix 291 on the light emitting layer 24 and the corresponding pixel unit 241. Thus, the microlens portion 311 and the light shielding matrix 291 can form a good match, and the microlens portion 311 can fully converge the light emitted by the pixel unit 241 and reduce the light blocked by the light shielding matrix 291, effectively improving the light output efficiency of the display module 20. At the same time, the light shielding matrix 291 can also effectively improve the brightness attenuation of the light with a large viewing angle, and cooperate with the microlens portion 311 to converge the light to effectively realize the anti-peeping function. In this embodiment, the shape of the microlens portion 311 is not limited, as long as it can converge the light by means of total reflection. For example, the cross-section of the microlens portion 311 can be roughly trapezoidal, and in the direction from the light emitting layer 24 to the light shielding layer 29, the radial dimension of the microlens portion 311 gradually decreases to form an inclined surface for reflecting light.

[0062] In some embodiments, the refractive index of one of the microlens portion 311 and the refractive layer 312 is 1.6-1.8, and the refractive index of the other is 1.4-1.56. Fig.10 As shown, when the microlens portion 311 and the refractive layer 312 converge light by refraction, the refractive index of the microlens portion 311 is 1.6-1.8, and the refractive index of the refractive layer 312 is 1.4-1.56. Fig.12 In the embodiment shown, when the microlens portion 311 converges light by total reflection, the refractive index of the microlens portion 311 and the refractive layer 312 is Fig.10 The material of the micro lens portion 311 and the refractive layer 312 includes but is not limited to any suitable material such as organic glass, which is beneficial to improving the drop resistance and chemical stability of the display module 20.

[0063] It can be understood that the size of the microlens portion 311 in the direction in which the light emitting layer 24 is perpendicular to the refractive layer 312, that is, the larger the height of the microlens portion 311, the more obvious the convergence effect on the light, and the stronger the effect of improving the light extraction efficiency and realizing the anti-peeping function that can be achieved by cooperating with the light shielding layer 29. In some embodiments, the size of the microlens portion 311 in the direction in which the light emitting layer 24 is directed to the light shielding layer 29 is 2um-4um. Such a setting can not only enable the microlens portion 311 to effectively converge light, but also make the thickness of the microlens array layer 31 not too large, which is conducive to compressing the thickness of the display module 20. In some embodiments, in the preparation of the microlens portion 311, a coating process can be first used to coat the raw material for forming the microlens portion 311 on the encapsulation layer 25, and then a plurality of microlens portions 311 arranged in an array can be formed by an etching process. The coating process can better control the thickness of the microlens portion 311, which is conducive to compressing the thickness of the microlens array layer 31. The refractive layer 312 can be prepared on the side of the microlens portion 311 and the encapsulation layer 25 facing away from the light-emitting layer 24 by any suitable process such as coating or inkjet printing after the microlens portion 311 is prepared.

[0064] exist Fig.10 and Fig.12 In the embodiment shown, the optical modulation layer 28 is a polarizer. Fig.13 As shown, when the display module 20 is provided with a microlens array layer 31, the optical modulation layer 28 may also adopt a color filter film, and the specific structure of the color filter film can be obtained by referring to the above description. The microlens array layer 31 is located on the side of the optical modulation layer 28 and the light shielding layer 29 facing the light emitting layer 24, and the black matrix layer 282 of the optical modulation layer 28 and the light shielding matrix 291 of the light shielding layer 29 can cooperate to shield the large viewing angle light in the light beam converged by the microlens array layer 31, further improving the anti-peeping performance of the display module 20. Moreover, the reflectivity of the microlens array layer 31 to ambient light is usually higher than that of the optical modulation layer 28. The microlens array layer 31 is arranged on the side of the optical modulation layer 28 facing the light-emitting layer 24, so that the microlens array layer 31 is away from the surface of the display module 20, for example, away from the cover plate, so that the arrangement of the microlens array layer 31 will not excessively increase the reflectivity of the display module 20 to external light, which is beneficial to reducing the reflection phenomenon of the display module 20 and avoiding the reflection phenomenon from affecting the display quality, so that the display module 20 can obtain better display quality with lower display brightness, which is also beneficial to reducing the energy consumption of the display module 20.

[0065] It should be noted that in the various drawings of the present application, the opening shape of the pixel unit 241 is a circle as an example. In other embodiments, the opening shape of each pixel unit 241 can also be any suitable shape such as an ellipse, a square, a rectangle, a diamond, etc. The shape of the microlens portion 311, the shading matrix 291 and the color filter structure 2811 can also be adjusted according to the opening shape of the corresponding pixel unit 241. In the various drawings of the present application, each pixel unit 241 corresponds to a microlens portion 311. In other embodiments, each pixel unit 241 can also correspond to multiple microlens portions 311, or one microlens portion 311 corresponds to multiple pixel units 241.

[0066] Please see again Figure 2 In some embodiments, the light shielding layer 29 further includes a light-transmitting adhesive structure 292. The material of the light-transmitting adhesive structure includes but is not limited to any applicable adhesive structure such as optical adhesive. The light-transmitting adhesive structure 292 is arranged in the same layer as the light shielding matrix 291 and fills the hollow part of the light shielding matrix 291. The projection of the light-transmitting adhesive structure 292 on the light-emitting layer 24 covers the first pixel unit 2411 and the second pixel unit 2412. The light-transmitting adhesive structure 292 can provide support for the light shielding layer 29 and improve the connection strength between the light shielding layer 29 and the two adjacent layer structures. In some embodiments, when the light shielding layer 29 is arranged between the touch layer 26 and the adhesive layer 27, the light-transmitting adhesive structure 292 is connected to the touch layer 26 and the adhesive layer 27. The light-transmitting adhesive structure 292 and the adhesive layer 27 can form an integrated structure through a single coating process or a double coating process, which is conducive to improving the structural reliability of the display module 20.

[0067] In some embodiments, the encapsulation layer 25 includes two inorganic layers 251 and an organic layer 252 stacked between the two inorganic layers 251. The materials of the two inorganic layers 251 can be the same or different inorganic materials. The materials of the inorganic layer 251 include but are not limited to one or more of silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), ZnSe, ZnO, Sb2O3, Al2O3, In2O3 or SnO2. The materials of the organic layer 252 include but are not limited to acrylic polymers, etc. The organic layer 252 can block the penetration of external moisture or oxygen to provide encapsulation protection for the light-emitting layer 24. The organic layer 252 can also flatten the inorganic layer 251 by blocking the defects of the inorganic layer 251 to improve the light extraction efficiency of the display module 20.

[0068] In some embodiments, the thickness of the organic layer 252 is greater than or equal to 10um, for example, it can be 10um, 12um, 14um or 18um, etc. It can be understood that the thickness of the encapsulation layer 25 affects the angle of light emission in the encapsulation layer 25. The thicker the encapsulation layer 25, the more high-angle light is emitted from the encapsulation layer 25. Therefore, setting the thickness of the organic layer 252 to 12um or more can increase the probability that the high-angle emitted light is blocked by the shading matrix 291, and increase the brightness attenuation of the high-angle viewing angle, thereby effectively realizing the anti-peep screen design. Increasing the thickness of the organic layer 252 is also conducive to avoiding the excessive thickness of the inorganic layer 251 and affecting the flatness of the encapsulation layer 25.

[0069] Please refer to the following Table 1, which shows the light output efficiency and brightness attenuation of the pixel unit 241 corresponding to the light shielding layer 29 and the microlens array. Among them, "only setting the microlens array layer 31" in the first row corresponds to the case where the microlens array layer 31 is set and the light shielding layer 29 is omitted, "only setting the light shielding layer 29" corresponds to the case where the light shielding layer 29 is set without setting the microlens array, and "microlens array layer 31 + light shielding layer 29" corresponds to the case where both the microlens array layer 31 and the light shielding layer 29 are set. The "opening size" in the first column corresponds to the opening radius of the pixel unit 241, and the "efficiency" corresponds to the efficiency improvement ratio of the corresponding pixel unit 241 compared with the pixel unit 241 without the microlens array layer 31. The same line value corresponding to each viewing angle is the brightness attenuation ratio relative to the main light at the corresponding viewing angle.

[0070] Table 1

[0071]

[0072] Combined with Table 1 and Figure 3 and Figure 4 It can be seen that when a light shielding layer 29 is provided, the light shielding layer 29 can effectively block light at a viewing angle of more than 15° of the corresponding first pixel unit 2411. When the opening radius of the pixel unit 241 is 5um, the brightness attenuation corresponding to a 35° viewing angle is 7%. Only the light shielding layer 29 can achieve a 35° anti-peeping effect. Further providing a microlens array layer 31 on the basis of providing the light shielding layer 29 can improve the anti-peeping effect, and is also conducive to improving the light extraction efficiency. The smaller the opening radius of the pixel unit 241, the more obvious the improvement in the light extraction efficiency. For example, when the opening radius of the pixel unit 241 is 10um, at a 35° viewing angle, the brightness decreases from 24% to 19%. When the opening radius of the pixel unit 241 is 15um, the light extraction efficiency is improved by 15%, when the opening radius of the pixel unit 241 is 10um, the light extraction efficiency is improved by 36%, and when the opening radius of the pixel unit 241 is 5um, the light extraction efficiency is improved by 40%.

[0073] Based on the display module 20 described in any of the above embodiments, the present application further provides a display control method for controlling the display state of the display module 20, the display control method comprising:

[0074] Control the switches of the first pixel unit 2411 and the second pixel unit 2412 so that the display module 20 can switch between a first display state and a second display state, wherein in the first display state, the first pixel unit 2411 is turned on and at least part of the second pixel unit 2412 is turned off, and in the second display state, both the first pixel unit 2411 and the second pixel unit 2412 are turned on.

[0075] In the first display state, only the first pixel unit 2411 may be turned on to achieve a good anti-peeping effect, or some of the second pixel units 2412 may be turned on, and the number of the turned-on second pixel units 2412 is less than that in the second display state, so as to achieve the anti-peeping effect while taking into account the improvement of PPI. In the first display state, the light output brightness of the first pixel unit 2411 is less than the light output brightness of the first pixel unit 2411 in the second display state. It can be understood that in the first display state, the display module 20 can achieve an effective anti-peeping effect, and in the second display state, the display module 20 can have a higher PPI and can achieve good display quality, thereby meeting the use requirements of different scenarios and improving the application scope of the display module 20.

[0076] In some embodiments, the display module 20 may further include a control element (not shown in the figure), which may be a processor in the display module 20 or a chip separately set for controlling the display function. The control element can control the switch of the first pixel unit 2411 and the second pixel unit 2412 so that the display module 20 can switch between the first display state and the second display state. In some embodiments, the switch of the first pixel unit 2411 and the second pixel unit 2412 may be controlled by a sub-pixel rendering (SRP) algorithm to achieve the switching between the first display state and the second display state. In some embodiments, in order to prevent the display module 20 from using the first display state for a much longer time than the second display state, resulting in a large life difference between the first pixel unit 2411 and the second pixel unit 2412, resulting in the occurrence of burn-in and other phenomena, the deburn-in algorithm may be used to implement functions such as pixel shift, brightness adjustment, color balance adjustment or image refresh to solve or alleviate the burn-in problem and optimize the display quality and service life of the display module 20.

[0077] refer to Fig.14 , Fig.14The electronic device 10 is a schematic diagram of the structure of the electronic device 10 provided in the embodiment of the present application. The electronic device 10 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art will understand that Fig.14 The structure of the electronic device 10 shown in the figure does not constitute a limitation on the electronic device 10, and the electronic device 10 may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0078] The radio frequency circuit 501 can be used to send and receive information, or receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, the data related to the uplink is sent to the base station. Generally, the radio frequency circuit 501 includes but is not limited to an antenna, at least one amplifier, a tuner, one or more oscillators, a subscriber identity module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to the Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0079] The memory 502 can be used to store applications and data. The applications stored in the memory 502 contain executable codes. The applications can form various functional modules. The processor 508 executes various functional applications and data processing by running the applications stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 10 (such as audio data, a phone book, etc.), etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 502 can also include a memory controller to provide the processor 508 and the input unit 503 with access to the memory 502.

[0080] The input unit 503 can be used to receive input digital, character information or user feature information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display screen or a touch pad, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories on or near the touch-sensitive surface), and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 508, and can receive and execute commands sent by the processor 508.

[0081] The display unit 504 can be used to display information input by the user or information provided to the user and various graphical user interfaces of the electronic device 10, which can be composed of graphics, text, icons, videos and any combination thereof. The display unit 504 may include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD, Liquid Crystal Display), an organic light-emitting diode (OLED, Organic Light-Emitting Diode), etc. Further, the touch-sensitive surface may cover the display panel, and when the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in Fig.14 In the embodiment, the touch-sensitive surface and the display panel are used as two independent components to realize input and output functions, but in some embodiments, the touch-sensitive surface and the display panel can be integrated to realize input and output functions.

[0082] The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light, and the proximity sensor may turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that can also be configured in the electronic device 10, they will not be repeated here.

[0083] The audio circuit 506 can provide an audio interface between the user and the electronic device 10 through a speaker and a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and convert it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is output to the processor 508 for processing, and then sent to another electronic device 10 through the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include an earphone socket to provide communication between an external earphone and the electronic device 10.

[0084] Wireless Fidelity (WiFi) is a short-range wireless transmission technology. The electronic device 10 can help users send and receive emails, browse web pages, and access streaming media through the wireless fidelity module 507, which provides users with wireless broadband Internet access. Fig.14 The wireless fidelity module 507 is shown, but it is understandable that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the essence of the invention.

[0085] The processor 508 is the control center of the electronic device 10. It uses various interfaces and lines to connect various parts of the entire electronic device 10. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it executes various functions of the electronic device 10 and processes data, thereby monitoring the electronic device 10 as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 508.

[0086] The electronic device 10 also includes a power supply 509 for supplying power to various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, so that the power management system can manage charging, discharging, and power consumption. The power supply 509 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0087] although Fig.14 Not shown, the electronic device 10 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above modules can refer to the previous method embodiment, which will not be described in detail here.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display module, characterized in that: include: A light-emitting layer including a plurality of pixel units; An optical modulation layer, disposed on the light-emitting side of the light-emitting layer and used to adjust the light emitted by the pixel unit; as well as, The light shielding layer is arranged on the light-emitting side of the light-emitting layer, and the orthographic projection of the light shielding layer on the light-emitting layer surrounds at least a part of the pixel unit.

2. The display module according to claim 1, characterized in that: The light-emitting layer includes a plurality of first pixel units arranged in an array, and a plurality of second pixel units arranged in an array together with the first pixel units. The positive projection of the light-shielding layer on the light-emitting layer surrounds the first pixel units and is staggered with the area corresponding to the second pixel units.

3. The display module according to claim 2, characterized in that: The display module has a first display state and a second display state. In the first display state, the first pixel unit is turned on and at least part of the second pixel unit is turned off. In the second display state, both the first pixel unit and the second pixel unit are turned on.

4. The display module according to claim 3, characterized in that: In the first display state, part of the second pixel units are turned on, and the number of the turned-on second pixel units is less than that in the second display state.

5. The display module according to claim 3, characterized in that: In the first display state, the light output brightness of the first pixel unit is lower than the light output brightness of the first pixel unit in the second display state.

6. The display module according to claim 1, characterized in that: The distance between the orthographic projection of the light-shielding layer on the light-emitting layer and the pixel unit surrounded by the light-shielding layer is in the range of 0-6 um.

7. The display module according to claim 1, characterized in that: The optical modulation layer includes a color filter layer and a black matrix layer arranged in the same layer, the color filter layer includes a plurality of color filter structures arranged in an array, the color filter structures are arranged corresponding to the pixel units, the black matrix layer surrounds the color filter structures, and the orthographic projection of the black matrix layer on the shading layer coincides with the shading layer.

8. The display module according to claim 1, characterized in that: The display module also includes a microlens array layer, which is arranged between the shading layer and the light-emitting layer and includes a refractive layer and a plurality of microlens portions arranged in an array, wherein the microlens portion is arranged at least corresponding to the pixel unit surrounded by the shading layer, the refractive layer covers the microlens portion on a side of the microlens portion facing away from the light-emitting layer, and the refractive index of the refractive layer is different from the refractive index of the microlens portion.

9. The display module according to claim 8, characterized in that: The refractive index of the refractive layer is smaller than the refractive index of the microlens portion, and the orthographic projection of the microlens portion on the light-emitting layer at least covers the pixel unit surrounded by the light-shielding layer.

10. The display module according to claim 9, characterized in that: The orthographic projection of the microlens portion on the light-emitting layer is between the orthographic projection of the light-shielding layer on the light-emitting layer and the pixel unit.

11. The display module according to claim 9, characterized in that: The side of the microlens portion facing away from the light-emitting layer is a convex surface.

12. The display module according to claim 11, characterized in that: The microlens portion has a first surface facing away from the light-emitting layer, the first surface includes a middle portion and a peripheral portion, the middle portion is substantially a plane, and the peripheral portion is arranged around the middle portion and is arc-shaped.

13. The display module according to claim 8, characterized in that: The refractive index of the refractive layer is greater than the refractive index of the microlens portion, and the orthographic projection of the microlens portion on the light-emitting layer at least surrounds the pixel unit surrounded by the light-shielding layer.

14. The display module according to claim 13, characterized in that: An inner contour of an orthographic projection of the microlens portion on the light-emitting layer is between an orthographic projection of the light-shielding layer on the light-emitting layer and the pixel unit.

15. The display module according to claim 8, characterized in that: The refractive index of one of the microlens portion and the refractive layer is 1.6-1.8, and the refractive index of the other is 1.4-1.

56.

16. The display module according to claim 8, characterized in that: The size of the microlens portion in a direction perpendicular from the light emitting layer to the light shielding layer is 2um-4um.

17. The display module according to claim 8, characterized in that: The microlens array layer is located between the optical modulation layer and the light emitting layer.

18. The display module according to any one of claims 1 to 17, characterized in that: The light-shielding layer further comprises a light-transmitting adhesive structure, which is arranged on the same layer as the light-shielding layer and fills the hollowed-out part of the light-shielding layer.

19. The display module according to claim 18, characterized in that: The display module further includes an adhesive layer for bonding the optical modulation layer and the light shielding layer together, and the light-transmitting adhesive structure is connected to the adhesive layer.

20. The display module according to any one of claims 1 to 17, characterized in that: The display module includes an encapsulation layer, which is arranged on the light-emitting layer and located on the light-emitting side of the light-emitting layer. The encapsulation layer includes two inorganic layers and an organic layer stacked between the two inorganic layers. The thickness of the organic layer is greater than or equal to 10um.

21. A display screen, characterized in that: It comprises a cover plate and a display module as described in any one of claims 1 to 20, wherein the cover plate is arranged on a side of the optical modulation layer facing away from the light-emitting layer.

22. An electronic device, characterized in that: It comprises a middle frame and a display screen as claimed in claim 21, wherein the display screen is arranged on the middle frame.

23. A display control method for controlling the display state of a display module, characterized in that: The display module includes a light-emitting layer and a light-shielding layer, the light-emitting layer includes a plurality of first pixel units arranged in an array, and a plurality of second pixel units arranged in an array together with the first pixel units, the orthographic projection of the light-shielding layer on the light-emitting layer is staggered with the area corresponding to the second pixel unit, and surrounds the first pixel unit, and the display control method includes: Control the switches of the first pixel unit and the second pixel unit so that the display module can switch between a first display state and a second display state, wherein in the first display state, the first pixel unit is turned on and at least part of the second pixel unit is turned off, and in the second display state, both the first pixel unit and the second pixel unit are turned on.

24. The display control method according to claim 23, characterized in that: In the first display state, part of the second pixel units are turned on, and the number of the turned-on second pixel units is less than that in the second display state.

25. The display control method according to claim 23, characterized in that: In the first display state, the light output brightness of the first pixel unit is smaller than the light output brightness of the first pixel unit in the second display state.

Images