Light guide module, display module, display, and electronic device

Abstract

Disclosed in embodiments of the present application are a light guide module, a display module, a display, and an electronic device, used for reducing the volume of light guide modules and the volume of display modules, and improving the optical efficiency. The embodiments of the present application further provide the light guide module, comprising: a light guide plate and a reflection unit, wherein the reflection unit is connected to the light guide plate; the reflection unit has at least two inclined reflection surfaces; a first light beam among at least one light beam enters the light guide plate; the first light beam is incident to the reflection unit by means of the light guide plate; and the reflection unit is configured to reflect the first light beam incident on the reflection unit to obtain a reflected first light beam.

Description

A light guide module, a display module, a display, and an electronic device.

[0001] This application claims priority to Chinese Patent Application No. 2025101233083, filed with the State Intellectual Property Office of China on January 24, 2025, entitled "A light guide module, display module, display and electronic device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of optical technology, specifically to a light guide module, a display module, a display, and an electronic device. Background Technology

[0003] Micro-projection systems have been widely used in the field of near-eye displays, such as in augmented reality (AR) glasses and virtual reality (VR) glasses.

[0004] Taking a micro-projection system using a liquid crystal on silicon (LCOS) optical system as an example, the light generated by the light source in the LCOS optical system is incident on a beam splitter, which then scatters the light out. The size of the beam splitter needs to match the area of ​​the LCOS control region, resulting in a relatively large beam splitter size. This leads to a relatively large overall size of the LCOS optical system. Since AR and VR glasses have limited space, there is a need to further reduce the size of the LCOS optical system. Current micro-projection systems suffer from excessive size and complex structure. Furthermore, the micro-projection system uses a light scattering method, which results in low optical efficiency. Summary of the Invention

[0005] This application provides a light guide module, a display module, a display, and an electronic device to reduce the size of the light guide module and the display module, and to improve optical efficiency.

[0006] To address the aforementioned technical problems, this application provides the following technical solutions:

[0007] In a first aspect, embodiments of this application also provide a light guide module, including: a light guide plate and a reflection unit; the reflection unit is connected to the light guide plate, and the reflection unit has at least two inclined reflection surfaces; a first light beam in at least one light beam enters the light guide plate, and the first light beam is incident on the reflection unit through the light guide plate; the reflection unit is used to reflect the first light beam incident on the reflection unit to obtain a reflected first light beam.

[0008] In the above scheme, the light guide module includes a light guide plate and a reflection unit. The reflection unit has at least two tilted reflective surfaces, which can reflect the first light beam, allowing the reflected first light beam to enter the display unit. Therefore, the tilted reflective surfaces of the reflection unit can fully reflect the first light beam generated by the light source. The reflection unit can replace the large polarizing beam splitter, thus reducing the size of the display module. Furthermore, the reflection unit has at least two tilted reflective surfaces, enabling efficient light guiding and improving optical utilization.

[0009] In one possible implementation of the first aspect, the reflecting unit includes: a plurality of microstructures, each microstructure including: two tilted reflective surfaces; the plurality of microstructures are distributed above or below the surface of the light guide plate. In the above scheme, each of the plurality of microstructures may include two tilted reflective surfaces, so that the first light beam emitted from the light source can be reflected by the light guide plate to the tilted reflective surfaces. In the embodiments of this application, the reflecting unit includes a plurality of microstructures, which are capable of reflecting the light beam incident from the light guide plate, and through the two tilted reflective surfaces included in the microstructures, the light beam incident from the light guide plate can be sufficiently reflected, thereby improving optical efficiency.

[0010] In one possible implementation of the first aspect, the duty cycle of the plurality of microstructures is greater than or equal to 50%. In the above scheme, the duty cycle refers to the distribution ratio of the plurality of microstructures on the surface of the light guide plate. The larger the duty cycle of the microstructures, the denser the distribution of microstructures on the surface of the light guide plate. With a duty cycle of the plurality of microstructures greater than or equal to 50%, the reflective unit can employ microstructures with a high duty cycle. When the first light beam entering the light guide plate is incident on the reflective unit, the microstructures can reflect the first light beam through the light guide plate to the display unit, thereby improving optical efficiency.

[0011] In some embodiments of this application, the duty cycle of the microstructure is 100%. In this case, there are no gaps between the microstructures, and multiple microstructures are closely connected and distributed on the surface of the light guide plate. For the first light beam entering the light guide plate, no matter from which angle it is incident on the reflection unit, the microstructure can ensure that the first light beam is reflected to the display unit through the light guide plate, thereby improving optical efficiency.

[0012] In one possible implementation of the first aspect, the plurality of microstructures includes adjacent first and second microstructures. The first microstructure includes a first tilted reflective surface and a second tilted reflective surface, and the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface. The first and third tilted reflective surfaces have the same tilt direction, and the second and fourth tilted reflective surfaces have the same tilt direction. The second and third tilted reflective surfaces are connected at the same position on the light guide plate. In the above solution, the second and third tilted reflective surfaces are connected at the same position on the light guide plate, thereby achieving a high-density microstructure. For the first light beam entering the light guide plate, regardless of the angle from which it enters the reflecting unit, the microstructure can ensure that the first light beam is reflected by the light guide plate to the display unit, thereby improving optical efficiency.

[0013] In one possible implementation of the first aspect, the tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees. In the above scheme, the range of the tilt angle of the tilted reflective surface can be determined according to the design scenario of the reflective unit. In the embodiments of this application, there is a tilt angle between the tilted reflective surface of the microstructure and the surface of the light guide plate. The tilted reflective surface of the microstructure can completely reflect the incident light beam, thus improving optical efficiency.

[0014] In one possible implementation of the first aspect, the difference between the tilt angles of two adjacent tilted reflectors is less than or equal to 10 degrees. In this scheme, the difference between the tilt angles of two adjacent tilted reflectors is less than or equal to 10 degrees, thereby enabling adjacent tilted reflectors to completely reflect light beams with different incident angles, improving optical efficiency.

[0015] In one possible implementation of the first aspect, the light guide module further includes: a reflective film; the reflective film and the at least one light source are disposed on opposite sides of the light guide plate; a fourth beam of the at least one light beam enters the light guide plate and is incident on the reflective film through the light guide plate; the reflective film is used to reflect the fourth beam incident on the reflective film, so that the reflected fourth beam is incident on the reflective unit through the light guide plate; the reflective unit is used to reflect the fourth beam incident on the reflective unit, so that the fourth beam reflected by the reflective unit is... In the above solution, the reflective film can reflect the fourth beam into the reflective unit, so that at least two tilted reflective surfaces in the reflective unit can reflect the fourth beam. Through the at least two tilted reflective surfaces in the reflective unit and the reflective film, the complete reflection of the outgoing beam can be achieved, improving optical efficiency. Furthermore, the emission angle of the light source is not limited, and the outgoing beam can be reflected to the display unit through the reflective film and the reflective unit, reducing the size of the display module.

[0016] In one possible implementation of the first aspect, the light guide module further includes a filling layer; the reflective unit is disposed in the filling layer. In the above solution, the filling layer is adjacent to the light guide plate, and the reflective unit is disposed in the filling layer, so that the filling layer can serve to accommodate the reflective unit.

[0017] Secondly, embodiments of this application provide a display module, comprising: at least one light source, a light guide module, and a display unit, wherein...

[0018] The light guide module includes: a light guide plate and a reflection unit; the reflection unit is connected to the light guide plate and has at least two inclined reflection surfaces; the light guide plate is disposed between the display unit and the reflection unit.

[0019] The at least one light source is used to provide at least one light beam, wherein a first light beam of the at least one light beam enters the light guide plate;

[0020] The light guide plate is used to direct the first light beam entering the light guide plate onto the reflection unit;

[0021] The reflection unit is used to reflect the first light beam incident on the reflection unit so that the reflected first light beam enters the display unit;

[0022] The display unit is used to modulate the polarization state of the first light beam entering the display unit to obtain a second light beam, the second light beam being incident from the display unit onto the light guide plate;

[0023] The light guide plate is also used to direct a second light beam incident on the light guide plate onto the reflection unit;

[0024] The reflecting unit is also used to modulate the second beam incident on the reflecting unit to obtain a third beam.

[0025] In the above scheme, the display module includes: at least one light source, a light guide module, and a display unit. The light guide module includes a light guide plate and a reflective unit connected to the light guide plate. The reflective unit has at least two tilted reflective surfaces. The light guide plate is disposed between the display unit and the reflective unit. At least one light source provides at least one light beam. A first light beam from the at least one light beam enters the light guide plate and is incident on the reflective unit. The reflective unit reflects the first light beam so that the reflected first light beam enters the display unit. The display unit modulates the polarization state of the first light beam to obtain a second light beam. The second light beam is incident from the display unit onto the light guide plate and then onto the reflective unit. The reflective unit modulates the second light beam incident on the reflective unit to obtain a third light beam. The light guide module used in this embodiment includes a light guide plate and a reflective unit. The reflective unit has at least two tilted reflective surfaces, which can reflect the first light beam, allowing the reflected beam to enter the display unit. Therefore, the tilted reflective surfaces of the reflective unit can fully reflect the first light beam generated by the light source. The reflective unit can replace a large polarizing beam splitter, thus reducing the size of the display module. Furthermore, the reflective unit has at least two tilted reflective surfaces, enabling efficient light guiding and improving optical utilization.

[0026] In one possible implementation of the second aspect, the reflective unit includes: a plurality of microstructures, the microstructures including: two of the inclined reflective surfaces; the plurality of microstructures are distributed above or below the surface of the light guide plate.

[0027] In one possible implementation of the second aspect, the duty cycle of the plurality of microstructures is greater than or equal to 50%.

[0028] In one possible implementation of the second aspect, the plurality of microstructures includes adjacent first and second microstructures, the first microstructure including a first tilted reflective surface and a second tilted reflective surface, the second microstructure including a third tilted reflective surface and a fourth tilted reflective surface; the first tilted reflective surface and the third tilted reflective surface have the same tilt direction, the second tilted reflective surface and the fourth tilted reflective surface have the same tilt direction; the second tilted reflective surface and the third tilted reflective surface are connected to the same position on the light guide plate.

[0029] In one possible implementation of the second aspect, the tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees.

[0030] In one possible implementation of the second aspect, the difference between the tilt angles of two adjacent tilted reflective surfaces in the at least two tilted reflective surfaces is less than or equal to 10 degrees.

[0031] In one possible implementation of the second aspect, the light guide module further includes: a reflective film;

[0032] The reflective film and the at least one light source are disposed on both sides of the light guide plate;

[0033] The fourth beam of the at least one beam enters the light guide plate, and the fourth beam passes through the light guide plate and is incident on the reflective film;

[0034] The reflective film is used to reflect the fourth light beam incident on the reflective film, so that the reflected fourth light beam is incident on the reflective unit through the light guide plate;

[0035] The reflecting unit is used to reflect the fourth light beam incident on the reflecting unit so that the fourth light beam reflected by the reflecting unit enters the display unit;

[0036] The display unit is used to modulate the polarization state of the fourth light beam entering the display unit to obtain a fifth light beam. The fifth light beam is incident from the display unit onto the light guide plate, and the fifth light beam incident on the light guide plate is incident onto the reflection unit.

[0037] The reflecting unit is also used to modulate the fifth beam incident on the reflecting unit to obtain a sixth beam.

[0038] In the above scheme, the reflective film and at least one light source are disposed on both sides of the light guide plate. The reflective film can reflect the fourth beam, thereby reflecting the fourth beam to the reflective unit. The reflective unit has at least two tilted reflective surfaces, which can fully reflect the beam, achieve efficient light guiding, and improve optical utilization.

[0039] In one possible implementation of the second aspect, the light guide module further includes: a filling layer; the reflective unit is disposed in the filling layer.

[0040] In one possible implementation of the second aspect, the display module further includes: a first polarizer; the first polarizer is disposed on the side of the light guide plate near the reflecting unit; the third light beam is incident on the first polarizer; the first polarizer is used to filter the third light beam incident on the polarizer to obtain a filtered third light beam. In the above scheme, the first polarizer can filter the third light beam emitted from the reflecting unit, thereby achieving the function of beam filtering.

[0041] In one possible implementation of the second aspect, the light guide module further includes: a polarization beam-splitting film layer; the reflecting unit is covered by the polarization beam-splitting film layer; the reflecting unit is specifically used to modulate the second light beam incident on the reflecting unit through the polarization beam-splitting film layer to obtain a third light beam. In the above scheme, the polarization beam-splitting film layer covering the reflecting unit can be used to achieve modulation of the emitted light intensity.

[0042] In one possible implementation of the second aspect, the light source includes: a first light-emitting array, a light-mixing module, a light-uniforming module, and a second polarizer; the first light-emitting array is used to generate three primary color beams; the light-mixing module is used to perform color combining processing on the three primary color beams to obtain a combined color beam; the light-uniforming module is used to control the exit angle and spot shape of the combined color beam to obtain a controlled beam, the controlled beam being incident on the second polarizer; the second polarizer is used to filter the beam incident on the second polarizer to obtain the at least one beam. In the above scheme, the light source includes a first light-emitting array, a light-mixing module, a light-uniforming module, and a second polarizer, and the light-mixing module, the light-uniforming module, and the second polarizer are capable of outputting a beam to the light guide module.

[0043] In one possible implementation of the second aspect, the light source includes: a second light-emitting array, a reflector, and a third polarizer; the second light-emitting array is used to generate a three-primary-color light beam; the reflector is used to shape the three-primary-color light beam and control its light transmission angle to obtain a controlled light beam, the controlled light beam being incident on the third polarizer; the third polarizer is used to filter the light beam incident on the third polarizer to obtain the at least one light beam. In the above scheme, the light source includes a second light-emitting array, a reflector, and a third polarizer, and the guide light module can output a light beam through the second light-emitting array, the reflector, and the third polarizer.

[0044] In one possible implementation of the second aspect, the light source includes: a third light-emitting array, a color-combining prism group, and a polarization multiplexing prism group; the third light-emitting array is used to generate three primary color beams; the color-combining prism group is used to perform color-combining processing on the three primary color beams to obtain a color-combined beam; the polarization multiplexing prism group is used to polarize multiplex the color-combined beam to obtain the at least one beam. In the above scheme, the light source includes a third light-emitting array, a color-combining prism group, and a polarization multiplexing prism group, which can guide the light-guiding module to output a beam.

[0045] In one possible implementation of the second aspect, the display unit includes a microdisplay.

[0046] In the second aspect of this application, the components of the light guide module in the display module may also be the light guide modules as described in the first aspect and various possible implementations above, as detailed in the foregoing description of the first aspect and various possible implementations.

[0047] Thirdly, embodiments of this application also provide a display, the display comprising: a light guide module as described in any one of the first aspects above, or a display module as described in any one of the second aspects above.

[0048] Fourthly, embodiments of this application also provide an electronic device, the electronic device including: a display as shown in any of the third aspects.

[0049] For example, the electronic device could be AR glasses or VR glasses. Attached Figure Description

[0050] Figure 1 is a schematic diagram of the composition structure of a display module provided in an embodiment of this application;

[0051] Figure 2a is a schematic diagram of the composition structure of a reflective unit provided in an embodiment of this application;

[0052] Figure 2b is a schematic diagram of a microstructure with a duty cycle of 100% provided in an embodiment of this application;

[0053] Figure 2c is a schematic diagram of a microstructure with a duty cycle of 75% provided in an embodiment of this application;

[0054] Figure 3 is a three-dimensional structural diagram of a reflective unit provided in an embodiment of this application;

[0055] Figure 4a is a schematic diagram of a first microstructure and a second microstructure intersecting above the surface of a light guide module according to an embodiment of this application;

[0056] Figure 4b is a schematic diagram showing the intersection of a first microstructure and a second microstructure below the surface of a light guide module, according to an embodiment of this application.

[0057] Figure 5 is a schematic diagram of the tilt angle between a microstructure and a light guide module provided in an embodiment of this application;

[0058] Figure 6 is a schematic diagram of the composition structure of another display module provided in an embodiment of this application;

[0059] Figure 7 is a schematic diagram of the composition structure of a light source provided in an embodiment of this application;

[0060] Figure 8 is a top view of a display module provided in an embodiment of this application;

[0061] Figure 9 is a side view of a display module provided in an embodiment of this application;

[0062] Figure 10 is a schematic diagram of the composition structure of another light source provided in an embodiment of this application;

[0063] Figure 11 is a top view of another display module provided in an embodiment of this application;

[0064] Figure 12 is a side view of another display module provided in an embodiment of this application;

[0065] Figure 13 is a schematic diagram of the composition structure of another light source provided in an embodiment of this application;

[0066] Figure 14 is a top view of another display module provided in an embodiment of this application;

[0067] Figure 15 is a side view of another display module provided in an embodiment of this application.

[0068] The components and corresponding reference numerals in the embodiments of this application are described as follows: Display module: 100; Light source: 110; Light guide module: 120; Display unit: 130; The light guide module 120 includes: a light guide plate 121 and a reflection unit 122; The reflection unit 122 includes: multiple microstructures 1221; The microstructure 1221 includes: two tilted reflective surfaces 12211 and 12212; The multiple microstructures 1221 include adjacent first microstructures 1221a and second microstructures 12212; The first microstructure 1221a includes: a first tilted reflective surface 12211a and a second tilted reflective surface 12212a; The second microstructure 1221b includes: a third tilted reflective surface 12211b and a fourth tilted reflective surface 12212b; The light guide module 120 further includes: a reflective film 123; The light guide module 120 further includes: a filling layer 124; The display module 100 further includes: a first polarizer 140; a light guide module 120 further includes: a polarizing beam splitter layer 125; a light source 110 includes: a first light-emitting array 111, a light mixing module 112, a light homogenizing module 113, and a second polarizer 114; the light source 110 includes: a second light-emitting array 115, a reflector 116, and a third polarizer 117; the light source 110 includes: a third light-emitting array 118, a color combining prism group 119, and a polarizing multiplexing prism group 1110. Detailed Implementation

[0069] This application provides a light guide module, a display module, a display, and an electronic device to reduce the size of the light guide module and the display module, and to improve optical efficiency.

[0070] The embodiments of this application will now be described with reference to the accompanying drawings.

[0071] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0072] Micro-projection has been widely used in the field of near-eye displays, such as in augmented reality (AR) and virtual reality (VR) devices.

[0073] Micro-projection systems can be developed based on microdisplays such as Liquid Crystal on Silicon (LCOS), Micro-LED, and Micro-OLED. Among these, LCOS offers high pixel count and low cost, and its manufacturing technology is compatible with Complementary Metal Oxide Semiconductor (CMOS) technology, allowing for large-scale manufacturing using semiconductor processes. An LCOS microdisplay requires a light-emitting diode (LED) light source, a beam splitter, a polarizer, and lenses to form the LCOS optical system, enabling micro-projection display functionality. The beam splitter can be a polarizing beam splitter (PBS).

[0074] The LCOS optical system suffers from structural complexity. Specifically, its optical behavior is as follows: light emitted from the LED light source enters the PBS beamsplitter through a shaping optical path, achieving uniform reflection of S-polarized light onto the LCOS surface. The LCOS surface then polarizes the S-polarized light and reflects it again. The reflected light passes through the PBS beamsplitter and finally exits through the lens. The size of the PBS beamsplitter in the LCOS optical system's optical path needs to match the area of ​​the LCOS control region. However, the PBS beamsplitter is typically a cubic structure, resulting in a relatively large size. This leads to a relatively large overall size of the LCOS optical system. Given the limited space available for AR and VR glasses, there is a further requirement to reduce the size of the LCOS optical system.

[0075] To address the issue of excessively large PBS beamsplitters required to match the LCOS control region in LCOS optical systems, which leads to an overly large overall optical module size and low optical efficiency, thus failing to meet the brightness requirements of AR glasses, this application provides a display module employing a front-lit type optical module based on a light guide plate and a reflective unit. The reflective unit reflects the light beam through at least two tilted reflective surfaces, which can replace the large PBS beamsplitter, thereby reducing the size of the display module. Furthermore, the at least two tilted reflective surfaces can effectively reflect light, thereby significantly improving light guiding efficiency.

[0076] As shown in Figure 1, this application provides a display module, which includes at least one light source, a light guide module, and a display unit. The light guide module includes a light guide plate and a reflection unit. The reflection unit is connected to the light guide plate and has at least two inclined reflection surfaces. The light guide plate is disposed between the display unit and the reflection unit.

[0077] In this embodiment, the number of light sources in the display module is not limited. For example, the display module may include one light source, two light sources, three light sources, or more light sources. In addition, the positional relationship between the light sources and the display unit and the light guide module is not limited and can be designed according to the actual product layout of the display module.

[0078] The at least one light source provided in this application embodiment can specifically be a polarized light source or a module of polarized light sources. For example, a polarized light source can be used to emit S-polarized light. Specifically, a polarized light source refers to enhancing imaging contrast in photolithography by adjusting the proportion and direction of polarized light in the illumination source. A polarized light source controls the polarization state of light, ensuring all beams propagate in the same plane, thereby affecting the propagation characteristics of light and its interaction with matter. The working principle of a polarized light source is based on the polarization characteristics of light; polarized light refers to the vibration of the electric field vector of light in a specific direction. In photolithography, adjusting the direction and proportion of polarized light can optimize the imaging effect during the photolithography process. For example, using linearly polarized or circularly polarized light can improve image contrast and resolution, thereby improving the quality of photolithography.

[0079] The display module provided in this application embodiment also includes a light guide module, which guides the light beam emitted from the light source, allowing the light beam to propagate into the display unit. The light guide module includes a light guide plate and a reflection unit. The reflection unit is connected to the light guide plate, and the light guide plate is disposed between the display unit and the reflection unit. For example, the light guide plate may be aligned with the light source. The light guide plate can receive the light beam emitted from the light source and then send the light beam to the reflection unit, which may be disposed above the light guide plate.

[0080] In this embodiment, the light guide plate can be made of glass or plastic. The light guide plate has a light guiding function. In this embodiment, the material type and size of the light guide plate are not limited.

[0081] In this embodiment, the reflective unit has at least two tilted reflective surfaces, and the number of tilted reflective surfaces included in the reflective unit is not limited. At least two tilted surfaces can reflect the first light beam, allowing the reflected first light beam to enter the display unit. Therefore, the tilted reflective surfaces of the reflective unit can sufficiently reflect the first light beam generated by the light source. The reflective unit can replace the larger PBS beam splitter, thus reducing the size of the display module.

[0082] The display module provided in this application embodiment further includes a display unit capable of modulating the light beam reflected by the reflecting unit. For example, the display unit can modulate the polarization state of the illumination beam P to form a modulated light beam.

[0083] In some embodiments of this application, the display unit includes a microdisplay.

[0084] For example, the display unit can be a microdisplay. The display unit is a liquid crystal on silicon (LCOS) panel used to modulate and reflect the illumination beam P. Alternatively, the display unit can also be a microdisplay such as Micro-LED or Micro-OLED.

[0085] Based on the display module shown in Figure 1, the beam transmission and processing process between the light source, light guide module and display unit in the display module will be described next.

[0086] At least one light source is provided to provide at least one light beam, wherein the first light beam of the at least one light beam enters the light guide plate;

[0087] A light guide plate is used to direct the first light beam entering the light guide plate to the reflection unit;

[0088] A reflective unit is used to reflect the first light beam incident on the reflective unit so that the reflected first light beam enters the display unit.

[0089] The display unit is used to modulate the polarization state of the first beam entering the display unit to obtain a second beam, which is incident from the display unit onto the light guide plate.

[0090] The light guide plate is also used to direct a second beam incident on the light guide plate onto the reflecting unit;

[0091] The reflecting unit is also used to modulate the second beam incident on the reflecting unit to obtain a third beam.

[0092] The light source can generate one or more light beams. For example, the light source generates a first light beam, which can specifically be a first S-beam. The first light beam enters the light guide plate and then passes through the light guide plate to the reflection unit. In this embodiment, the exit angle of the first light beam is not limited. After exiting the light source, the first light beam enters the light guide plate, which can reflect the first light beam and output it to the reflection unit. The reflection unit has at least two inclined reflective surfaces. The first light beam exiting the light guide plate can be reflected by at least two inclined reflective surfaces, and the reflected first light beam then passes through the light guide plate and is perpendicularly incident into the display unit. As shown in Figure 1, the incident angle of the first light beam can be various. The first light beam undergoes one or more reflections within the light guide plate and enters the reflection unit. At least two inclined surfaces in the reflection unit can reflect the first light beam, allowing the reflected first light beam to enter the display unit. Since the at least two inclined surfaces in the reflection unit are inclined reflective surfaces, the inclination angle of the inclined surfaces can be determined according to the direction of the light beam emitted from the light source. Therefore, the first light beam from the light guide plate can be fully reflected, and the first light beam can be fully reflected to the display unit, improving the light guiding efficiency.

[0093] In some embodiments of this application, as shown in FIG2a, the reflective unit includes: a plurality of microstructures, the microstructures including: two tilted reflective surfaces;

[0094] Multiple microstructures are distributed above or below the surface of the light guide plate.

[0095] In this embodiment, two inclined surfaces constitute a microstructure, and the reflective unit may include multiple microstructures. The number of microstructures included in the reflective unit is not limited in this application embodiment. Figure 3 shows a three-dimensional structural diagram of a reflective unit provided in this application embodiment. Each microstructure may include two inclined reflective surfaces, so that the first beam emitted from the light source can be reflected by the light guide plate to the inclined reflective surfaces. In this application embodiment, the reflective unit includes multiple microstructures, which can reflect the beam incident from the light guide plate. Furthermore, through the two inclined reflective surfaces included in the microstructures, the beam incident from the light guide plate can be sufficiently reflected, improving optical efficiency.

[0096] In this embodiment, the positional relationship between the multiple microstructures and the light guide plate can be varied. For example, the multiple microstructures can be distributed above or below the surface of the light guide plate. As shown in Figure 4a, a schematic diagram of a first microstructure and a second microstructure intersecting above the surface of the light guide module is provided in this embodiment. The first microstructure and the second microstructure are located above the surface of the light guide module and intersect at the surface of the light guide module. Therefore, the first beam emitted from the light source can be reflected by the light guide plate to the tilted reflective surface, improving optical efficiency.

[0097] Unlike Figure 4a above, the first microstructure and the second microstructure are located below the surface of the light guide module. As shown in Figure 4b, which is a schematic diagram of the first microstructure and the second microstructure intersecting below the surface of the light guide module according to an embodiment of this application, the first microstructure and the second microstructure are disposed in the light guide module. The first light beam emitted from the light source enters the light guide plate. The first microstructure and the second microstructure are located below the surface of the light guide module. The first light beam emitted from the light source is incident on the first microstructure and the second microstructure. The first microstructure and the second microstructure can reflect the first light beam, so that the first light beam passes through the light guide plate and is incident on the display unit.

[0098] In some embodiments of this application, the duty cycle of multiple microstructures is greater than or equal to 50%.

[0099] In this embodiment, the surface of the light guide plate is the surface adjacent to the reflecting unit. Multiple microstructures, including the reflecting unit, can be distributed on the surface of the light guide plate, with a duty cycle of 50% or greater. Specifically, the duty cycle refers to the distribution ratio of multiple microstructures on the surface of the light guide plate; the larger the duty cycle, the denser the microstructures on the surface of the light guide plate. The surface of the light guide plate can be divided into structured and unstructured areas. The proportion of the area with distributed microstructures on the surface of the light guide plate to the total surface area can be called the duty cycle. Figure 2b shows a schematic diagram of a microstructure with a 100% duty cycle according to an embodiment of this application. For example, the duty cycle can be specifically expressed as x / (x+y), where x represents the sum of the cross-sectional lengths of all microstructures, and y is the gap length between all microstructures. For example, x+y is the length from A to D in Figure 2b, which is the length from the leftmost starting point of the first microstructure to the rightmost ending point of the second microstructure. AB is the length of the cross-section of the first microstructure, CD is the length of the cross-section of the second microstructure, x equals AB + CD. If points B and C coincide, there is no unstructured area on the surface of the light guide plate, then y = 0. The sum of the cross-section lengths of the first and second microstructures is the length of AD. The sum of the cross-sections of the first and second microstructures occupies the entire surface of the light guide plate, so the duty cycle of the microstructure is 100%.

[0100] Additionally, Figure 2c shows a schematic diagram of a microstructure with a 75% duty cycle provided in an embodiment of this application. For example, the duty cycle can be specifically expressed as x / (x+y), where x represents the sum of the cross-sectional lengths of all microstructures, and y represents the gap length between all microstructures. For example, x+y is the length from A to D in Figure 2c, which is the length from the leftmost starting point of the first microstructure to the rightmost ending point of the second microstructure. AB is the length of the cross-section of the first microstructure, and CD is the length of the cross-section of the second microstructure. x equals AB+CD. If points B and C do not coincide, the length of AB equals the length of BC, and the length of AB equals the length of CD. Then, the cross-section of the unstructured area on the surface of the light guide plate is BC, i.e., y = BC. The sum of the cross-sectional lengths of the first and second microstructures is (AB+CD), i.e., x equals (AB+CD). The proportion of (AB+CD) occupying the entire surface length AD of the light guide plate is 75%, therefore, the duty cycle of the microstructure is 75%.

[0101] For example, the duty cycle of the microstructure can be 100%, or any value greater than 50%, such as 55%, 60%, 65%, 70%, 75%, 80%, 90%, 95%, 96%, 97%, 98%, or 99%. In this embodiment, the duty cycle of the microstructure exceeds 50%, and it can also be referred to as a high duty cycle or high-density microstructure. This embodiment does not limit the specific range of the duty cycle of the microstructure or the specific value within that range. In this embodiment, multiple microstructures have a duty cycle greater than or equal to 50%. The reflection unit can employ a high duty cycle microstructure. When the first light beam entering the light guide plate is incident on the reflection unit, the microstructure can reflect the first light beam through the light guide plate to the display unit, thereby improving optical efficiency.

[0102] In some embodiments of this application, as shown in Figures 4a and 4b, a plurality of microstructures include adjacent first microstructures and second microstructures. The first microstructure includes a first tilted reflective surface and a second tilted reflective surface, and the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface.

[0103] The first and third inclined reflective surfaces are inclined in the same direction, and the second and fourth inclined reflective surfaces are inclined in the same direction.

[0104] The second and third tilted reflective surfaces are connected at the same position on the light guide plate.

[0105] In this structure, the first microstructure and the second microstructure are two adjacent microstructures in the reflective unit. The first microstructure and the second microstructure are connected at the same position on the light guide plate, as shown in Figures 4a and 4b. The multiple microstructures in the reflective unit are closely connected, and the two adjacent microstructures are connected at the same position on the light guide plate. This enables the microstructure to achieve a high duty cycle. For the first light beam entering the light guide plate, no matter from which angle it enters the reflective unit, the microstructure can ensure that the first light beam is reflected to the display unit through the light guide plate, thereby improving optical efficiency.

[0106] For example, the first microstructure includes a first tilted reflective surface and a second tilted reflective surface. The first microstructure can be triangular, and the first and second tilted reflective surfaces are arranged opposite to each other. Similarly, the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface. The third and fourth tilted reflective surfaces are arranged opposite to each other, and the second and third tilted reflective surfaces are adjacent to each other. The second and third tilted reflective surfaces are connected to the same position on the light guide plate, thereby achieving a high-density microstructure.

[0107] In some embodiments of this application, as shown in FIG5, the tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees.

[0108] In this design, one tilted reflective surface of the microstructure forms an angle A with the surface of the light guide plate, and the other tilted reflective surface of the microstructure forms an angle B with the surface of the light guide plate. The tilt angles of the tilted reflective surfaces range from 20 degrees to 70 degrees, meaning that angle A and angle B both range from 20 degrees to 70 degrees. For example, angle A can be 25 degrees, 30 degrees, 35 degrees, 40 degrees, 43 degrees, 44 degrees, 45 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 50 degrees, 55 degrees, or 60 degrees. Similarly, angle B can be 25 degrees, 30 degrees, 35 degrees, 40 degrees, 43 degrees, 44 degrees, 45 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 50 degrees, 55 degrees, or 60 degrees. The aforementioned angle values ​​are merely feasible implementations of this application's embodiments and are not intended to limit the scope of this application's embodiments. In this application's embodiments, the range of the tilt angle of the tilted reflective surface can be determined based on the design scenario of the reflective unit. In this application's embodiments, there is a tilt angle between the tilted reflective surface of the microstructure and the surface of the light guide plate. This tilted reflective surface of the microstructure can completely reflect the incident light beam, thus improving optical efficiency.

[0109] In some embodiments of this application, the difference between the tilt angles of two adjacent tilted reflective surfaces in at least two tilted reflective surfaces is less than or equal to 10 degrees.

[0110] In this embodiment, the angle between each tilted reflective surface and the surface of the light guide plate in the reflective unit is the tilt angle. The tilt angles of two adjacent tilted reflective surfaces can be equal, for example, each tilt angle is 45 degrees. Alternatively, the tilt angles of at least two adjacent tilted reflective surfaces can be unequal, but the values ​​of the tilt angles are close, for example, the difference between the tilt angles of at least two adjacent tilted reflective surfaces is less than or equal to 10 degrees. The difference between the tilt angles of two adjacent tilted reflective surfaces can be 9 degrees, 8 degrees, 7 degrees, 6 degrees, 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree, or 0 degrees. The above angle values ​​are only feasible implementations of this application embodiment, and the tilt angle of the tilted reflective surfaces is not limited in this application embodiment. In this application embodiment, the difference between the tilt angles of two adjacent tilted reflective surfaces is less than or equal to 10 degrees, thereby enabling adjacent tilted reflective surfaces to completely reflect light beams with different incident angles, improving optical efficiency.

[0111] In some embodiments of this application, as shown in FIG6, the light guide module further includes: a reflective film;

[0112] A reflective film and at least one light source are disposed on both sides of the light guide plate;

[0113] At least one of the light beams, the fourth beam, enters the light guide plate and is incident on the reflective film through the light guide plate;

[0114] A reflective film is used to reflect the fourth beam incident on the reflective film, so that the reflected fourth beam is incident on the reflective unit through the light guide plate.

[0115] A reflective unit is used to reflect the fourth beam incident on the reflective unit so that the fourth beam reflected by the reflective unit enters the display unit.

[0116] The display unit is used to modulate the polarization state of the fourth beam entering the display unit to obtain the fifth beam. The fifth beam is incident from the display unit onto the light guide plate, and the fifth beam incident on the light guide plate is incident onto the reflection unit.

[0117] The reflecting unit is also used to modulate the fifth beam incident on the reflecting unit to obtain the sixth beam.

[0118] The light guide module may further include a reflective film, which can be used to reflect the light beam emitted from the light source. For example, as shown in Figure 6, the reflective film is disposed on the side of the light guide plate. The light source emits a fourth light beam, which enters the light guide plate and is incident on the reflective film. The reflective film reflects the fourth light beam incident on it, so that the reflected fourth light beam passes through the light guide plate and enters the reflection unit. The reflection unit reflects the fourth light beam incident on it, so that the reflected fourth light beam enters the display unit. The display unit modulates the polarization state of the fourth light beam entering the display unit to obtain a fifth light beam. The fifth light beam is incident from the display unit onto the light guide plate, and then incident on the reflection unit. The reflection unit modulates the fifth light beam incident on it to obtain a sixth light beam. In this embodiment, the reflective film can reflect the fourth light beam into the reflection unit, so that at least two tilted reflective surfaces in the reflection unit can reflect the fourth light beam. Through the at least two tilted reflective surfaces in the reflection unit and the reflective film, the complete reflection of the emitted light beam can be achieved, improving optical efficiency. In addition, there is no limitation on the emission angle of the light source, and the emitted light beam can be reflected to the display unit through the reflective film and reflective unit, which reduces the size of the display module.

[0119] In some embodiments of this application, as shown in FIG6, the light guide module further includes: a filling layer;

[0120] The reflective elements are placed in the fill layer.

[0121] As shown in Figure 6, the filling layer is adjacent to the light guide plate, and the reflective unit is disposed in the filling layer, thus enabling the filling layer to accommodate the reflective unit. In this embodiment, the materials used for the microstructures in the filling layer and the reflective unit can be the same or different; for example, the difference in refractive index between the materials of the filling layer and the microstructures in the reflective unit is less than 0.1.

[0122] In some embodiments of this application, as shown in FIG6, the display module further includes: a first polarizer; the first polarizer is disposed on the side of the light guide plate near the reflective unit;

[0123] The third beam is incident on the first polarizer;

[0124] The first polarizer is used to filter the third beam incident on the polarizer to obtain a filtered third beam.

[0125] The display module includes a first polarizer, which can also be called a first polarizer. The first polarizer is disposed on the side of the light guide plate near the reflecting unit. A third beam emitted from the reflecting unit enters the first polarizer from the reflecting unit. The first polarizer filters the incident third beam to obtain a filtered third beam, for example, a P-beam. In this embodiment, the first polarizer can filter the third beam emitted from the reflecting unit, thus achieving beam filtering.

[0126] In some embodiments of this application, as shown in FIG6, the light guide module further includes: a polarization beam splitting film layer;

[0127] The reflecting unit is covered by a polarization beam-splitting film.

[0128] The reflecting unit is specifically used to modulate the second beam incident on the reflecting unit through a polarization beam splitting film to obtain a third beam.

[0129] The reflecting unit is covered by a polarization beam-splitting film, which has the same structure as the reflecting unit. Specifically, the reflecting unit includes multiple microstructures, and the polarization beam-splitting film can cover these microstructures. In this embodiment, the polarization beam-splitting film covering the reflecting unit can be used to modulate the intensity of the emitted light.

[0130] The following examples illustrate the application scenarios of the display module provided in the embodiments of this application.

[0131] The embodiments of this application can be applied to projection display devices such as AR glasses, head-up displays (HUDs), and laser TVs. The main application scenario is in projection optical engines based on the LCOS architecture, which reduces the structural height while ensuring optical efficiency.

[0132] The display module provided in this application embodiment can be a microstructure-based front-lit liquid crystal on silicon (LCOS) module, which may include microstructures in the light guide component. By optimizing the microstructures in the light guide component, high-efficiency light guiding can be achieved while effectively reducing the structural height.

[0133] In the LCOS projection product provided in this application embodiment, after disassembly and observation of the optical system architecture, it can be found that the microstructure covered by the polarization beam-splitting film layer has a high duty cycle (greater than 50%). The microstructure also contains two tilted surfaces, for example, these two tilted surfaces are normally symmetrical, with tilt angles between 20-70 degrees, allowing P-ray transmission and S-ray reflection. Furthermore, the filling layer is covered by the polarization beam-splitting film layer, and the refractive index of the filling layer is close to that of the microstructure layer, with a difference of less than 0.1. The morphology of the light guide component's microstructure is observed using a microscope or scanning electron microscope (SEM) to determine whether the duty cycle is greater than 50% and whether the microstructure contains two normally symmetrical tilted surfaces with tilt angles between 20-70 degrees. By optimizing the microstructure design, the light guiding efficiency is effectively improved.

[0134] The optical components shown in Figure 6 mainly include: a polarization light source module, a light guide module, a display unit, and a first polarizer. The light guide module includes: a light guide plate, a microstructure, a polarization beam splitting film, a filling layer, and a reflective film. The display unit is specifically an LCOS device.

[0135] This application embodiment employs a light guide module. The light guide plate in this component is made of glass or plastic and has a light guiding function. The light guide plate contains micro / nano structures covered by a polarizing beam-splitting film, and the microstructure has a duty cycle greater than 50%. Furthermore, the microstructure contains two inclined surfaces with angles between 20 and 70 degrees, and the angle difference between the two inclined surfaces is less than 10 degrees, enabling P-light transmission and S-light reflection. A reflective film is located on one side of the light guide plate to reflect light incident on its edge, thereby improving optical utilization efficiency.

[0136] The beam propagation process of the optical element shown in Figure 6 will be explained below:

[0137] A polarized light source emits S-polarized light, which is incident on the light guide module. The S-light is transmitted through the light guide plate. When the light enters the microstructure, because the microstructure is covered by a polarizing beam-splitting film, the S-light is deflected by the first surface of the microstructure, causing it to exit the light guide module. Therefore, the S-light will gradually travel along the light guide plate, be reflected by the microstructure, and enter the LCOS device. Simultaneously, due to the presence of the reflective film, some light incident on the edge of the light guide plate is reflected back to the light guide plate and propagates in the opposite direction. When it encounters the microstructure, the S-light is gradually reflected by the second surface of the microstructure and exits the light guide plate. The combined use of the reflective film and the two inclined surfaces of the microstructure effectively improves optical utilization. The LCOS device modulates the incident S-light into P-light, reflects it through the light guide plate, and simultaneously utilizes the polarizing beam-splitting film covering the microstructure to modulate the intensity of the emitted light. The P-light is then further emitted through a polarizer.

[0138] Current PBS architectures utilize the PBS surface to reflect all light at once. Because the polarizing beam splitters in the PBS are arranged at a 45-degree angle, the height of the PBS surface needs to be comparable to the size of the LCOS screen, increasing the size of the optical system. However, the light guide plate combined with microstructures provided in this application allows light of small height to enter the light guide plate and be gradually reflected by the microstructures to the LCOS device as it propagates, thus reducing the height of the optical components.

[0139] In this embodiment, a front-lit LCOS module is constructed by combining a light guide plate with a microstructure to reduce the size of the optical system. At the same time, the microstructure is optimized by using a high-density microstructure with a duty cycle of more than 50%, and each microstructure has two inclined surfaces. Combined with a reflective film, efficient light guiding is achieved, and optical utilization is improved.

[0140] In some embodiments of this application, as shown in Figures 7, 8 and 9, the light source includes: a first light-emitting array, a light-mixing module, a light-uniforming module and a second polarizer;

[0141] The first light-emitting array is used to generate beams of the three primary colors;

[0142] The light mixing module is used to perform color combining processing on the three primary color beams to obtain a combined color beam;

[0143] The beam homogenization module is used to control the emission angle and spot shape of the combined color beam to obtain a controlled beam, which is then incident on the second polarizer.

[0144] A second polarizer is used to filter the light beam incident on the second polarizer to obtain at least one light beam.

[0145] The first light-emitting array can be an LED array, which generates three primary color beams. A mixing module performs color combining on the three primary color beams to obtain a combined color beam; for example, this mixing module can be a mixing rod. A homogenizing module controls the exit angle and spot shape of the combined color beam to obtain a controlled beam. The controlled beam is then incident on a second polarizer; the homogenizing module can be a homogenizing rod or a lens. The second polarizer filters the incident beam to obtain at least one beam. In this embodiment, the light source includes a first light-emitting array, a mixing module, a homogenizing module, and a second polarizer. Through the mixing module, homogenizing module, and second polarizer, a beam can be output to the guide module.

[0146] For example, as shown in the top view of Figure 8, the display module includes two sets of light sources. One light source may include a first light-emitting array, a light mixing module, a light homogenizing module, and a second polarizer. The first light-emitting array can emit three primary color beams, such as red, green, and blue light. The light mixing module can combine the three primary color beams, and the light homogenizing module can control the emission angle and spot shape of the combined beams. Finally, the second polarizer filters the beams, and the filtered beams are incident into the light guide plate.

[0147] As shown in Figure 9, taking the implementation of a polarized light source as an example, the main components are as shown in Figure 9: an LED array, a mixing rod, a homogenizing rod, and a polarizer. The homogenizing rod can be replaced with a lens. Specifically, the LED array emits red, green, and blue light, which is then combined using the mixing rod. Subsequently, the exit angle and spot shape of the light are controlled by the homogenizing rod or a lens, and the light enters the polarizer, achieving S-light transmission and P-light absorption or reflection, ultimately outputting polarized light. This embodiment illustrates the implementation of a polarized light source, which may include an LED array, a mixing rod, a homogenizing rod, and a polarizer, simplifying the implementation of the light source in the display module.

[0148] In some embodiments of this application, as shown in Figures 10, 11 and 12, the light source includes: a second light-emitting array, a reflector and a third polarizer;

[0149] The second light-emitting array is used to generate beams of the three primary colors;

[0150] A reflector is used to shape the three primary color beams and control the light transmission angle to obtain a controlled beam, which is then incident on a third polarizer.

[0151] A third polarizer is used to filter the light beam incident on the third polarizer to obtain at least one light beam.

[0152] Specifically, the second light-emitting array can be an LED array. The second light-emitting array generates a three-primary-color light beam. A reflector shapes the three-primary-color light beam and controls the light transmission angle to obtain a controlled light beam. The controlled light beam is then incident on a third polarizer, which filters the light beam incident on the second polarizer to obtain at least one light beam. In this embodiment, the light source includes a second light-emitting array, a reflector, and a third polarizer. Through the second light-emitting array, the reflector, and the third polarizer, a light beam can be output to the guide light module.

[0153] As illustrated below, as shown in the top view of Figure 11 and the side view of Figure 12, the polarized light source may include three LED arrays. The main components of the polarized light source are shown in Figures 11 and 12: an LED array, a reflector, and a polarizer. In this embodiment, the LED array emits red, green, and blue light, and the reflector is used for shaping and controlling the light transmission angle. This embodiment illustrates the implementation of a polarized light source, which may include an LED array, a reflector, and a polarizer, simplifying the implementation of the light source in the display module.

[0154] In some embodiments of this application, as shown in Figures 13, 14 and 15, the light source includes: a third light-emitting array, a color-combining prism group and a polarization multiplexing prism group;

[0155] The third light-emitting array is used to generate beams of the three primary colors;

[0156] A color combining prism assembly is used to combine the three primary color beams to obtain a combined color beam.

[0157] A polarization multiplexing prism assembly is used to polarize a combined color beam to obtain at least one beam.

[0158] The third light-emitting array may include three light-emitting arrays distributed at different positions. The third light-emitting array generates three primary color beams, with each array generating a beam of one color. A color-combining prism group performs color combining on the three primary color beams to obtain a combined color beam. A polarization multiplexing prism group performs polarization multiplexing on the combined color beam to obtain at least one beam. In this embodiment, the light source includes a third light-emitting array, a color-combining prism group, and a polarization multiplexing prism group. Through the third light-emitting array, the color-combining prism group, and the polarization multiplexing prism group, the light beam can be output from the guide module.

[0159] To further improve optical efficiency, the polarization source can be further optimized. As shown in Figures 14 and 15, the main components of the polarization source include an LED array, a lens, a color combining prism group, and a polarization multiplexing prism group. The color combining prism group combines the red, green, and blue light beams, thereby reducing optical spread. At the same time, the polarization multiplexing prism group achieves polarization multiplexing, enabling the simultaneous utilization of the P-light and S-light emitted by the LED array. Therefore, the optical efficiency of the entire system can be effectively improved.

[0160] As described in the foregoing embodiments, a front-light type LCOS module is achieved by combining a light guide plate with microstructures to form a light guide module, thereby reducing the size of the LCOS module. High-density microstructures with a duty cycle greater than 50% are used, each microstructure has two inclined surfaces, and a reflective film is also employed to improve the optical utilization efficiency of the light guide module.

[0161] This application embodiment also provides a light guide module, which includes: a light guide plate and a reflective unit;

[0162] The reflective unit is connected to the light guide plate, and the reflective unit has at least two tilted reflective surfaces;

[0163] At least one light beam enters the light guide plate, and the first light beam is incident on the reflection unit through the light guide plate;

[0164] A reflective unit is used to reflect the first light beam incident on the reflective unit so that the reflected first light beam enters the display unit.

[0165] In some embodiments of this application, as shown in Figures 2 and 3, the reflective unit includes: a plurality of microstructures, each microstructure including: two tilted reflective surfaces, and the plurality of microstructures are distributed above or below the surface of the light guide plate.

[0166] In some embodiments of this application, as shown in FIG2a, FIG2b and FIG2c, the duty cycle of multiple microstructures is greater than or equal to 50%.

[0167] In some embodiments of this application, as shown in Figures 4a and 4b, a plurality of microstructures include adjacent first microstructures and second microstructures. The first microstructure includes a first tilted reflective surface and a second tilted reflective surface, and the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface.

[0168] The first and third inclined reflective surfaces are inclined in the same direction, and the second and fourth inclined reflective surfaces are inclined in the same direction.

[0169] The second and third tilted reflective surfaces are connected at the same position on the light guide plate.

[0170] In some embodiments of this application, as shown in FIG5, the tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees.

[0171] In some embodiments of this application, the difference between the tilt angles of two adjacent tilted reflective surfaces in at least two tilted reflective surfaces is less than or equal to 10 degrees.

[0172] In some embodiments of this application, as shown in FIG6, the light guide module further includes: a reflective film;

[0173] A reflective film and at least one light source are disposed on both sides of the light guide plate;

[0174] At least one of the light beams, the fourth beam, enters the light guide plate and is incident on the reflective film through the light guide plate;

[0175] A reflective film is used to reflect the fourth beam incident on the reflective film, so that the reflected fourth beam is incident on the reflective unit through the light guide plate.

[0176] A reflective unit is used to reflect the fourth beam incident on the reflective unit so that the fourth beam reflected by the reflective unit enters the display unit.

[0177] The display unit is used to modulate the polarization state of the fourth beam entering the display unit to obtain the fifth beam. The fifth beam is incident from the display unit onto the light guide plate, and the fifth beam incident on the light guide plate is incident onto the reflection unit.

[0178] The reflecting unit is also used to modulate the fifth beam incident on the reflecting unit to obtain the sixth beam.

[0179] In this embodiment, a reflective film and at least one light source are disposed on both sides of a light guide plate. The reflective film can reflect the fourth light beam, thereby reflecting the fourth light beam to a reflective unit. The reflective unit has at least two tilted reflective surfaces, which can fully reflect the light beam, achieve efficient light guiding, and improve optical utilization.

[0180] In some embodiments of this application, as shown in FIG6, the light guide module further includes: a filling layer;

[0181] The reflective elements are placed in the fill layer.

[0182] As illustrated by the foregoing embodiments, the light guide module includes a light guide plate and a reflective unit. The reflective unit is connected to the light guide plate and has at least two tilted reflective surfaces. The light guide plate is disposed between the display unit and the reflective unit. At least one light source provides at least one light beam. A first beam of the at least one light beam enters the light guide plate and is incident on the reflective unit through the light guide plate. The reflective unit reflects the first beam so that the reflected first beam enters the display unit. The display unit modulates the polarization state of the first beam to obtain a second beam. The second beam is incident from the display unit onto the light guide plate and then onto the reflective unit. The reflective unit modulates the second beam incident on the reflective unit to obtain a third beam. The light guide module used in this application embodiment includes a light guide plate and a reflective unit. The reflective unit has at least two tilted reflective surfaces, which can reflect the first beam so that the reflected first beam can enter the display unit. Therefore, the tilted reflective surfaces of the reflective unit can fully reflect the first beam generated by the light source. The reflective unit can replace the large PBS beam splitter, thus reducing the size of the display module. In addition, the reflective unit has at least two tilted reflective surfaces, which can fully reflect the light beam, achieve efficient light guiding, and improve optical utilization.

[0183] This application embodiment also provides a display, including: a light guide module in a display module as shown in any one of Figures 1, 6, 9, 12 and 15 above, or a display module as shown in any one of Figures 1, 6, 9, 12 and 15 above.

[0184] This application also provides an electronic device, including: a display as described above.

[0185] For example, the electronic device could be AR glasses or VR glasses. However, it is not limited to these; the electronic device provided in this embodiment could also be other communication devices with a display, such as terminal devices or network devices.

[0186] It should be noted that, for the sake of simplicity, the foregoing device embodiments are all described as a series of device combinations. However, those skilled in the art should understand that this application is not limited to the described devices, as some devices can be implemented using other devices according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0187] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located on a single component or distributed across multiple units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

Claims

1. A light guide module, characterized in that, The light guide module includes: a light guide plate and a reflective unit; The reflective unit is connected to the light guide plate, and the reflective unit has at least two inclined reflective surfaces; At least one light beam enters the light guide plate, and the first light beam is incident on the reflection unit through the light guide plate; The reflecting unit is used to reflect the first light beam incident on the reflecting unit to obtain the reflected first light beam.

2. The light guide module according to claim 1, characterized in that, The reflective unit includes: a plurality of microstructures, the microstructures including: two tilted reflective surfaces; The multiple microstructures are distributed above or below the surface of the light guide plate.

3. The light guide module according to claim 2, characterized in that, The duty cycle of the multiple microstructures is greater than or equal to 50%.

4. The light guide module according to claim 2 or 3, characterized in that, The plurality of microstructures include adjacent first microstructures and second microstructures, wherein the first microstructure includes a first tilted reflective surface and a second tilted reflective surface, and the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface; The first and third inclined reflective surfaces have the same tilt direction, and the second and fourth inclined reflective surfaces have the same tilt direction. The second tilted reflective surface and the third tilted reflective surface are in contact with the same position on the light guide plate.

5. The light guide module according to any one of claims 1 to 4, characterized in that, The tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees.

6. The light guide module according to any one of claims 1 to 5, characterized in that, The difference between the tilt angles of two adjacent tilted reflective surfaces in the at least two tilted reflective surfaces is less than or equal to 10 degrees.

7. The light guide module according to any one of claims 1 to 6, characterized in that, The light guide module further includes: a reflective film; The reflective film and the at least one light source are disposed on both sides of the light guide plate; The fourth beam of the at least one beam enters the light guide plate, and the fourth beam passes through the light guide plate and is incident on the reflective film; The reflective film is used to reflect the fourth light beam incident on the reflective film, so that the reflected fourth light beam is incident on the reflective unit through the light guide plate; The reflecting unit is used to reflect the fourth beam incident on the reflecting unit, so that the fourth beam is reflected by the reflecting unit.

8. The light guide module according to any one of claims 1 to 7, characterized in that, The light guide module further includes: a filling layer; The reflective unit is disposed in the filling layer.

9. A display module, characterized in that, The display module includes: at least one light source, a light guide module, and a display unit, wherein... The light guide module includes: a light guide plate and a reflection unit; the reflection unit is connected to the light guide plate and has at least two inclined reflection surfaces; the light guide plate is disposed between the display unit and the reflection unit. The at least one light source is used to provide at least one light beam, wherein a first light beam of the at least one light beam enters the light guide plate; The light guide plate is used to direct the first light beam entering the light guide plate onto the reflection unit; The reflection unit is used to reflect the first light beam incident on the reflection unit so that the reflected first light beam enters the display unit; The display unit is used to modulate the polarization state of the first light beam entering the display unit to obtain a second light beam, the second light beam being incident from the display unit onto the light guide plate; The light guide plate is also used to direct a second light beam incident on the light guide plate onto the reflection unit; The reflecting unit is also used to modulate the second beam incident on the reflecting unit to obtain a third beam.

10. The display module according to claim 9, characterized in that, The reflective unit includes: a plurality of microstructures, the microstructures including: two tilted reflective surfaces; The multiple microstructures are distributed above or below the surface of the light guide plate.

11. The display module according to claim 10, characterized in that, The duty cycle of the multiple microstructures is greater than or equal to 50%.

12. The display module according to claim 10 or 11, characterized in that, The plurality of microstructures include adjacent first microstructures and second microstructures, wherein the first microstructure includes a first tilted reflective surface and a second tilted reflective surface, and the second microstructure includes a third tilted reflective surface and a fourth tilted reflective surface; The first and third inclined reflective surfaces have the same tilt direction, and the second and fourth inclined reflective surfaces have the same tilt direction. The second tilted reflective surface and the third tilted reflective surface are in contact with the same position on the light guide plate.

13. The display module according to any one of claims 9 to 12, characterized in that, The tilt angle of the tilted reflective surface ranges from 20 degrees to 70 degrees.

14. The display module according to any one of claims 9 to 13, characterized in that, The difference between the tilt angles of two adjacent tilted reflective surfaces in the at least two tilted reflective surfaces is less than or equal to 10 degrees.

15. The display module according to any one of claims 9 to 14, characterized in that, The light guide module further includes: a reflective film; The reflective film and the at least one light source are disposed on both sides of the light guide plate; The fourth beam of the at least one beam enters the light guide plate, and the fourth beam passes through the light guide plate and is incident on the reflective film; The reflective film is used to reflect the fourth light beam incident on the reflective film, so that the reflected fourth light beam is incident on the reflective unit through the light guide plate; The reflecting unit is used to reflect the fourth light beam incident on the reflecting unit so that the fourth light beam reflected by the reflecting unit enters the display unit; The display unit is used to modulate the polarization state of the fourth light beam entering the display unit to obtain a fifth light beam. The fifth light beam is incident from the display unit onto the light guide plate, and the fifth light beam incident on the light guide plate is incident onto the reflection unit. The reflecting unit is also used to modulate the fifth beam incident on the reflecting unit to obtain a sixth beam.

16. The display module according to any one of claims 9 to 15, characterized in that, The light guide module further includes: a filling layer; The reflective unit is disposed in the filling layer.

17. The display module according to any one of claims 9 to 16, characterized in that, The display module further includes: a first polarizer; the first polarizer is disposed on the side of the light guide plate near the reflective unit; The third beam is incident on the first polarizer; The first polarizer is used to filter the third beam incident on the polarizer to obtain a filtered third beam.

18. The display module according to any one of claims 9 to 17, characterized in that, The light guide module further includes: a polarization beam splitting film layer; The reflecting unit is covered by the polarization beam-splitting film layer; The reflecting unit is specifically used to modulate the second beam incident on the reflecting unit through the polarization beam splitting film to obtain a third beam.

19. The display module according to any one of claims 9 to 18, characterized in that, The light source includes: a first light-emitting array, a light mixing module, a light homogenizing module, and a second polarizer; The first light-emitting array is used to generate three primary color light beams; The light mixing module is used to perform color combining processing on the three primary color beams to obtain a combined color beam; The uniform light module is used to control the emission angle and spot shape of the combined color beam to obtain a controlled beam, which is then incident on the second polarizer. The second polarizer is used to filter the light beam incident on the second polarizer to obtain the at least one light beam.

20. The display module according to any one of claims 9 to 18, characterized in that, The light source includes: a second light-emitting array, a reflector, and a third polarizer; The second light-emitting array is used to generate beams of the three primary colors; The reflector is used to shape the three primary color beams and control the light transmission angle to obtain a controlled beam, which is then incident on the third polarizer. The third polarizer is used to filter the light beam incident on the third polarizer to obtain the at least one light beam.

21. The display module according to any one of claims 9 to 18, characterized in that, The light source includes: a third light-emitting array, a color-combining prism group, and a polarization multiplexing prism group; The third light-emitting array is used to generate three primary color beams; The color-combining prism group is used to perform color-combining processing on the three primary color beams to obtain a combined color beam. The polarization multiplexing prism group is used to polarize the combined color beam to obtain the at least one beam.

22. The display module according to any one of claims 9 to 21, characterized in that, The display unit includes a microdisplay.

23. A display, characterized in that, The display includes: a light guide module as described in any one of claims 1 to 8, or a display module as described in any one of claims 9 to 22.

24. An electronic device, characterized in that, The electronic device includes: a display as described in claim 23.

Images