Display system and control method thereof, head-mounted display device

Abstract

The application discloses a display system and a control method thereof and a head-mounted display device, and relates to the technical field of head-mounted display devices, wherein the display system is located in the light path from an external environment to human eyes, the display system comprises a display module and a light adjusting module, and the display module is at least partially provided in a light-transmitting mode; the light adjusting module is arranged on one side of the display module and located in the light path from the external environment to the display module, and the light adjusting module has a light-transmitting state and a light-blocking state; when the light adjusting module is in the light-blocking state, the external environment light is blocked from being transmitted to the human eyes, and the display module provides a display picture for a user; when the light adjusting module is in the light-transmitting state, the external environment light is transmitted to the human eyes in sequence through the light adjusting module and the display module. The technical scheme of the application can provide a display system with an optical perspective function, so that the external environment light can be transmitted to the human eyes, and the user can obtain a real scene picture of the external environment in real time.

Description

Technical Field

[0001] This invention relates to the field of head-mounted display technology, and particularly to a display system and its control method, and a head-mounted display device. Background Technology

[0002] In related technologies, virtual reality devices can capture images of the external environment using a camera module and then display these images to the user, enabling the device to provide video perspective and allowing the user to access external information while wearing it. However, this method suffers from a lag in the user's access to this information, negatively impacting the user experience. Summary of the Invention

[0003] The main objective of this invention is to propose a display system and its control method, as well as a head-mounted display device, which aims to provide a display system with optical see-through function so that external ambient light can be transmitted to the human eye, allowing the user to obtain real-time images of the external environment.

[0004] To achieve the above objectives, the present invention provides a display system comprising:

[0005] The display system is located in the optical path from the external environment to the human eye, and the display system includes:

[0006] A display module, wherein the display module is at least partially light-transmitting; and

[0007] A dimming module is disposed on one side of the display module and located in the optical path from the external environment to the display module. The dimming module has a light-transmitting state and a light-blocking state.

[0008] When the dimming module is in the light-blocking state, the external ambient light is blocked from being transmitted to the human eye, and the display module provides a display screen to the user.

[0009] When the dimming module is in the light-transmitting state, ambient light from outside passes through the dimming module and the display module in sequence and is transmitted to the human eye.

[0010] In one embodiment, the display module includes:

[0011] A plurality of display units, wherein the plurality of display units are arranged at intervals, the display units being used to emit display light toward the human eye; and

[0012] A plurality of light-transmitting units and a plurality of display units are located on the same plane and are arranged alternately with the plurality of display units. The light-transmitting units are configured to transmit light and are used to transmit external ambient light.

[0013] In one embodiment, each of the display units has a plurality of light-transmitting units arranged circumferentially.

[0014] In one embodiment, the display brightness of the display unit is adjustable to adapt to the state of the dimming module.

[0015] In one embodiment, the display system further includes an optical module disposed on the light output path of the display module, which is used to receive and transmit the display light to the human eye to magnify the display screen of the display module.

[0016] In one embodiment, the optical module includes an adjustment lens disposed on the light output path of the display module;

[0017] The focal length of the adjustable lens can be adjusted to focus the light emitted from the display module and form an image in the human eye when the display module is working, or to transmit ambient light when the display module is not working.

[0018] In one embodiment, the optical module includes an adjustment lens disposed on the light output path of the display module;

[0019] The focal length of the adjustable lens can be adjusted to modulate the light emitted from the display module into diffused light when the display module is working, or to emit ambient light in parallel when the display module is not working.

[0020] In one embodiment, the display system further includes a control module, which is electrically connected to both the dimming module and the display module.

[0021] The transparency of the dimming module is adjustable, and the transparency changes with the electrical signal of the control module.

[0022] The present invention also proposes a control method based on the display system described above, comprising the following steps:

[0023] The operating modes of the display system are obtained, and the display system includes a first operating mode and a second operating mode.

[0024] When the display system is in the first working mode, the dimming module is controlled to be in the light-blocking state, and the display module is controlled to have a first display brightness;

[0025] When the display system is in the second working mode, the dimming module is controlled to be in the light-transmitting state, and the display module is controlled to have a second display brightness, wherein the second display brightness is lower than the first display brightness.

[0026] In one embodiment, the display system further includes a third operating mode, and the control method further includes the following steps:

[0027] When the display system is in the third working mode, the dimming module is controlled to alternately switch between the light-blocking state and the light-transmitting state, and the display module is controlled to switch between the first display brightness and the second display brightness accordingly.

[0028] Specifically, when the dimming module is in the light-blocking state, the display module has the first display brightness; when the dimming module is in the light-transmitting state, the display module has the second display brightness.

[0029] In one embodiment, the switching frequency between the display module and the dimming module is greater than 25Hz.

[0030] In one embodiment, the step of controlling the display module to have a second display brightness includes:

[0031] The display module is controlled to stop working, and the brightness of the second display is set to zero.

[0032] The present invention also proposes a head-mounted display device, comprising the display system described in any one of the foregoing claims, wherein the display system is located in the optical path from the external environment to the human eye, and the display system comprises:

[0033] A display module, wherein the display module is at least partially light-transmitting; and

[0034] A dimming module is disposed on one side of the display module and located in the optical path from the external environment to the display module. The dimming module has a light-transmitting state and a light-blocking state.

[0035] When the dimming module is in the light-blocking state, the external ambient light is blocked from being transmitted to the human eye, and the display module provides a display screen to the user.

[0036] When the dimming module is in the light-transmitting state, ambient light from outside passes through the dimming module and the display module in sequence and is transmitted to the human eye.

[0037] The display system of this invention includes a display module located in the optical path from the external environment to the human eye. The display module emits display light to the human eye, enabling the user to obtain a virtual display image. Furthermore, the display module is light-transmitting. The display system also includes a dimming module. When the dimming module is in a light-blocking state, it blocks external ambient light from being transmitted to the human eye, ensuring a better display effect for the virtual display image obtained by the human eye. When the dimming module is in a light-transmitting state, external ambient light can be transmitted through the dimming module and the display module sequentially to the human eye, allowing the user to obtain a real-world image of the external environment. This achieves the optical transmission function of the display system, improving the user experience. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of the display system provided by the present invention in the first working mode;

[0040] Figure 2 for Figure 1 The diagram shows the structure of the system in the second working mode.

[0041] Figure 3 for Figure 1 A schematic diagram of the display module of the display system;

[0042] Figure 4 A flowchart of an embodiment of the control method for the display system provided by the present invention;

[0043] Figure 5 A flowchart of another embodiment of the control method for the display system provided by the present invention.

[0044] Explanation of icon numbers:

[0045] 100. Display system; 10. Display module; 11. Display unit; 12. Light transmission unit; 20. Dimming module; 30. Optical module.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] In related technologies, virtual reality devices can capture images of the external environment using a camera module and then display these images to the user, enabling the device to provide video perspective and allowing the user to access external information while wearing it. However, this method suffers from a lag in the user's access to this information, negatively impacting the user experience.

[0051] This invention proposes a display system 100. The display system 100 can be applied to a head-mounted display device, which can be a virtual reality display device or a mixed reality display device, and is not limited thereto.

[0052] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the display system 100 is located in the optical path from the external environment to the human eye, and the display system 100 includes:

[0053] Display module 10, wherein at least a portion of the display module 10 is light-transmitting; and

[0054] A dimming module 20 is disposed on one side of the display module 10 and located in the optical path from the external environment to the display module 10. The dimming module 20 has a light-transmitting state and a light-blocking state.

[0055] When the dimming module 20 is in the light-blocking state, the external ambient light is blocked from being transmitted to the human eye, and the display module 10 provides a display screen to the user.

[0056] When the dimming module 20 is in the light-transmitting state, ambient light from the outside passes through the dimming module 20 and the display module 10 in sequence and is transmitted to the human eye.

[0057] The display module 10 emits display light towards the user's eyes to provide a virtual display image. The display system 100 also includes a dimming module 20, located on the side of the display module 10 away from the user's eyes, and capable of switching between a light-blocking state and a light-transmitting state. When the dimming module 20 is in the light-blocking state, it blocks ambient light from reaching the user's eyes, resulting in a better virtual display image. When the dimming module 20 is in the light-transmitting state, ambient light can pass through the dimming module 20 and the display module 10 sequentially and reach the user's eyes, allowing the user to obtain a realistic view of the external environment. This achieves the optical transmission function of the display system 100, enhancing the user experience.

[0058] Specifically, the display module 10 can be a transparent display, which can be specifically configured as an LED (Light-Emitting Diode) display, an OLED (Organic Light-Emitting Diode) display, an LCD (Liquid Crystal Display) display, or other display modules 10 capable of transparent display. By making at least a portion of the display module 10 translucent, ambient light can be transmitted through the display module 10 to the human eye, allowing the human eye to directly observe the ambient light path.

[0059] Please see Figure 3 In an embodiment of the present invention, the display module 10 includes:

[0060] A plurality of display units 11 are arranged at intervals, and the display units 11 are used to emit display light to the human eye; and

[0061] A plurality of light-transmitting units 12 and a plurality of display units 11 are located on the same plane and are arranged alternately with the plurality of display units 11. The light-transmitting units 12 are light-transmitting and are used to transmit external ambient light.

[0062] The display unit 11 has pixels for displaying image information. Specifically, when the display module 10 is working, the pixels in the display unit 11 can be precisely lit and controlled according to the input image signal, so that the display module 10 can provide the corresponding display screen to the user.

[0063] Furthermore, the arrangement of the light-transmitting unit 12 can reduce the obstruction of external ambient light by the display module 10. Since the display units 11 and the light-transmitting units 12 are arranged alternately, the light-transmitting unit 12 can be set to transmit light, so that the external ambient light transmitted to the display module 10 can be transmitted through the light-transmitting unit 12 and further transmitted to the human eye.

[0064] Specifically, please refer to Figure 3 In embodiments of the present invention, each display unit 11 is surrounded by a plurality of light-transmitting units 12 in a circumferential direction. It is understood that this arrangement, while ensuring the display effect of the display units 11, provides sufficient spacing between the display units 11 to achieve high transparency in the display module 10.

[0065] The technical solution of the present invention is not limited to this. In some embodiments, several display units 11 can be arranged around each light-transmitting unit 12 in the circumferential direction to improve the density of the display units 11 and ensure the fineness of the displayed image. Of course, the display modules 10 can also be arranged in arrays in other directions. The specific implementation can be set according to actual needs and is not limited here.

[0066] In an embodiment of the present invention, the display brightness of the display unit 11 is adjustable to adapt to the state of the dimming module 20.

[0067] The display unit 11 of the display module 10 can have a first display brightness and a second display brightness, with the second display brightness being lower than the first display brightness. When the dimming module 20 is in a light-blocking state, the ambient light is blocked by the dimming module 20, and the human eye only receives the display image emitted by the display module 10. At this time, the display unit 11 can have the first display brightness to ensure the display effect of the display unit 11.

[0068] When the dimming module 20 is in a light-transmitting state, ambient light can pass through the dimming module 20 and be transmitted to the display module 10, where it is further transmitted to the human eye through the display unit 11. At this time, by making the display unit 11 have a second display brightness lower than the first display brightness, the interference of display light on ambient light can be reduced, so that the user can directly observe the real scene of the external environment.

[0069] It should be noted that the second display brightness can be set to zero, meaning the display module 10 stops emitting light. This prevents interference between the displayed light and the ambient light during transmission, thus minimizing the impact of the display module 10 on the ambient light. However, the technical solution of this invention is not limited to this. In another embodiment, the second display brightness may not be zero. In this case, the displayed image and the real-world image of the external environment can be superimposed to directly achieve an augmented reality effect; this is not limited here.

[0070] Therefore, it is understandable that by adjusting the display brightness of the display unit 11 to match the light-blocking state and the light-transmitting state respectively, it is beneficial to provide users with clear virtual display images and real-scene display images respectively, thereby achieving a better display effect.

[0071] Please see Figure 1 and Figure 2 In an embodiment of the present invention, the display system 100 further includes an optical module 30, which is disposed on the light output path of the display module 10 and is used to receive and transmit the display light to the human eye to amplify the display screen of the display module 10.

[0072] Specifically, the display light emitted from the display module 10 can be transmitted through the optical module 30 and converged by the optical module 30 to form a magnified image at the human eye, thereby enabling the display system 100 to have a better display effect. The dimming module 20, display module 10, and optical module 30 can be arranged sequentially along the same optical axis in the optical path from the external environment to the human eye to achieve a compact layout of the display system 100; however, the dimming module 20, display module 10, and optical module 30 can also be arranged in other ways, which are not limited here.

[0073] In one feasible implementation, the optical module 30 may be equipped with a single lens, which may be a convex lens, located in the light-emitting path of the display module 10. This lens converges the light emitted from the display module 10 to magnify the displayed image, thereby achieving a clearer display. Alternatively, the optical module 30 may include two or more lenses, with multiple lenses working together to modulate the displayed light. Specific implementations can be tailored to actual needs and are not limited here.

[0074] In an embodiment of the present invention, the optical module 30 includes an adjustment lens disposed on the light-emitting path of the display module 10; the focal length of the adjustment lens is adjustable and is used to focus the light emitted by the display module 10 and form an image in the human eye when the display module 10 is working, or to transmit external ambient light when the display module 10 is not working.

[0075] Specifically, the adjusting lens can be configured as a zoom lens, or it can be a liquid crystal lens. The shape and volume of the liquid crystal lens can be changed by altering the electrical signal applied to it, thereby achieving zoom adjustment of the optical module 30. Of course, in other embodiments, the zoom lens can also achieve zoom using mechanical zoom, which is not limited here.

[0076] Specifically, when the display module 10 is working, it emits display light towards the human eye, and the dimming module 20 is in a light-blocking state to prevent ambient light from being transmitted to the human eye. At this time, the focusing lens can be set as a convex lens to transmit and converge the display light. When the display module 10 is not working, and the dimming module 20 is in a light-transmitting state, the focusing lens can be set as a plane mirror to transmit ambient light without significantly affecting the transmission path of the ambient light. This avoids distortion of the real-world image of the external environment provided by the display system 100, which helps to ensure the display effect of the display system 100.

[0077] In an embodiment of the present invention, the display system 100 further includes a control module, which is electrically connected to the dimming module 20 and the display module 10 respectively; the transparency of the dimming module 20 is adjustable, and the transparency changes with the electrical signal of the control module.

[0078] In this embodiment, the dimming module 20 may include an electrochromic component, which is located in the optical path from the external environment to the display module 10. Its material may be an inorganic color-changing material or an organic color-changing material, etc., which is not limited here.

[0079] It is understandable that the color of the electrochromic component can change its transparency under the influence of an external electric field and current, thereby changing the transparency of the dimming module 20 according to the change of the electrical signal of the control module. This allows the transparency of the dimming module 20 to be increased, switching it to a light-transmitting state, allowing ambient light to pass through the dimming module 20 and be transmitted to the display module 10. Alternatively, the transparency of the dimming module 20 can be decreased, switching it to a light-blocking state, allowing ambient light to be blocked by the dimming module 20.

[0080] In some embodiments, the projection of the electrochromic component onto the plane of the display module 10 can be larger than the area of ​​the display module 10, so that the dimming module 20 has a better blocking effect on external ambient light when it is in the light-blocking state, so as to prevent external ambient light from being transmitted to the display module 10 when the dimming module 20 is in the light-blocking state and affecting the display light of the display module 10.

[0081] Of course, the technical solution of the present invention is not limited to this. The dimming module 20 may also include a light-blocking structure. This light-blocking structure is set to be opaque and can be moved by driving it to have a light-blocking position in the optical path from the external environment to the display module, and a light-transmitting position outside the optical path from the external environment to the display module. In this way, the dimming module 20 can alternately switch its light-blocking state and light-transmitting state by alternating between the light-blocking position and the light-transmitting position. The specific real-time method can be set according to actual needs and is not limited here.

[0082] The present invention also proposes a control method for a display system 100. The specific structure of the display system 100 is as described in the above embodiments. Since the control method of the display system 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0083] Please see Figure 4 In one embodiment of the present invention, the control method of the display system 100 includes the following steps:

[0084] S10. Obtain the working mode of the display system 100, wherein the display system 100 includes a first working mode and a second working mode.

[0085] S20. When the display system 100 is in the first working mode, the dimming module 20 is controlled to be in the light-blocking state, and the display module 10 is controlled to have a first display brightness.

[0086] When the dimming module 20 is in the first working mode, the dimming module 20, which is in a light-blocking state, can block the transmission of external ambient light to the human eye. The display module 10 operates at a first display brightness and emits display light to the human eye. At this time, the display system 100 can provide the user with a clear virtual display image, thereby realizing the virtual display function of the display system 100 when the display system 100 is in the first working mode.

[0087] S30. When the display system 100 is in the second working mode, the dimming module 20 is controlled to be in the light-transmitting state, and the display module 10 is controlled to have a second display brightness, wherein the second display brightness is lower than the first display brightness.

[0088] When the dimming module 20 is in the second working mode, the dimming module 20 in the light-transmitting state can transmit external ambient light, so that the external ambient light can be transmitted to the human eye through the dimming module 20 and the light-transmitting display module 10 in sequence. At this time, the display module 10 operates at a second display brightness, which is lower than the first display brightness. This reduces the impact of the display module 10 on the external ambient light, so that the display system 100 can provide the user with a clear real-life picture of the external environment and realize the optical perspective function of the display system 100.

[0089] Please see Figure 5 In another embodiment of the present invention, the display system 100 further includes a third operating mode, and the control method further includes the following steps:

[0090] S40. When the display system 100 is in the third working mode, the dimming module 20 is controlled to alternately switch between the light-blocking state and the light-transmitting state, and the display module 10 is controlled to switch between the first display brightness and the second display brightness accordingly; wherein, when the dimming module 20 is in the light-blocking state, the display module 10 has the first display brightness, and when the dimming module 20 is in the light-transmitting state, the display module 10 has the second display brightness.

[0091] It is understood that when the dimming module 20 is in the light-blocking state, the display module 10 has the first display brightness. At this time, the display system 100 is equivalent to being in the first working mode, which can realize the virtual display function and show the user a clear virtual display image. When the dimming module 20 is in the light-transmitting state, the display module 10 has the second display brightness, which can realize the optical perspective function to show the user a clear real-world image of the external environment in real time.

[0092] Based on this, by controlling the dimming module 20 to alternately switch between the light-blocking state and the light-transmitting state, and controlling the display module 10 to correspondingly switch between the first display brightness and the second display brightness, the display system 100 can alternately provide the user with virtual display images and real-world environmental images. This can achieve a visual effect of virtual-real fusion based on the persistence of vision of the human eye. Thus, the display system 100 can enhance display functions, or, based on the visual effect of virtual-real fusion, further provide the user with a mixed reality experience.

[0093] In embodiments of the present invention, the switching frequency between the display module 10 and the dimming module 20 is greater than 25Hz. As examples, the switching frequency of the display module 10 and the dimming module 20 may have the same value, specifically 30Hz, 35Hz, 40Hz, etc. By controlling the switching frequency range between the display module 10 and the dimming module 20, the persistence of vision mechanism of the human eye can be utilized, allowing the human eye to simultaneously see the real-world scene of the external environment and the display screen of the display module 10.

[0094] In an embodiment of the present invention, the step of controlling the display module 10 to have a second display brightness includes:

[0095] The display module 10 is controlled to stop working, and the brightness of the second display is zero.

[0096] Specifically, when the dimming module 20 is in a light-transmitting state, ambient light can pass through the dimming module 20 and be transmitted to the display module 10, where it is further transmitted to the human eye. At this time, by controlling the display module 10 to stop working, the display module 10 stops emitting display light to the human eye, thus avoiding interference between the display light and ambient light transmitted simultaneously. This reduces the impact of ambient light passing through the display module 10, providing the user with a realistic and clear picture of the external environment.

[0097] The present invention also proposes a head-mounted display device, which includes a display system 100. The specific structure of the display system 100 is as described in the above embodiments. Since the head-mounted display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0098] It should be noted that, since this head-mounted display device achieves optical see-through functionality through the display system 100 on the architecture of virtual reality devices, there is no need to set up functional structures such as camera modules. Compared with virtual reality devices that use video see-through functionality, this reduces the size and energy consumption of the head-mounted display device. Moreover, compared with conventional augmented reality glasses, it has a wider virtual field of view, enabling the head-mounted display device of this application to have the technical effects of a large field of view, low energy consumption, and thinness, thereby improving the user experience.

[0099] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A display system, characterized in that, The display system is located in the optical path from the external environment to the human eye, and the display system includes: A display module, wherein the display module is at least partially light-transmitting; and A dimming module is disposed on one side of the display module and located in the optical path from the external environment to the display module. The dimming module has a light-transmitting state and a light-blocking state. When the dimming module is in the light-blocking state, the external ambient light is blocked from being transmitted to the human eye, and the display module provides a display screen to the user. When the dimming module is in the light-transmitting state, ambient light from outside passes through the dimming module and the display module in sequence and is transmitted to the human eye.

2. The display system as described in claim 1, characterized in that, The display module includes: A plurality of display units, wherein the plurality of display units are arranged at intervals, the display units being used to emit display light toward the human eye; and A plurality of light-transmitting units and a plurality of display units are located on the same plane and are arranged alternately with the plurality of display units. The light-transmitting units are configured to transmit light and are used to transmit external ambient light.

3. The display system as described in claim 2, characterized in that, Each of the display units has a plurality of light-transmitting units arranged around its perimeter.

4. The display system as described in claim 2, characterized in that, The display brightness of the display unit is adjustable to adapt to the state of the dimming module.

5. The display system as described in any one of claims 1 to 4, characterized in that, The display system also includes an optical module located in the light-emitting path of the display module, which receives and transmits the display light to the human eye to magnify the display image of the display module.

6. The display system as described in claim 5, characterized in that, The optical module includes an adjustment lens, which is disposed on the light output path of the display module; The focal length of the adjustable lens can be adjusted to focus the light emitted from the display module and form an image in the human eye when the display module is working, or to transmit ambient light when the display module is not working.

7. The display system as described in any one of claims 1 to 4, characterized in that, The display system also includes a control module, which is electrically connected to both the dimming module and the display module. The transparency of the dimming module is adjustable, and the transparency changes with the electrical signal of the control module.

8. A control method for a display system as described in any one of claims 1 to 7, characterized in that, The control method includes the following steps: The operating modes of the display system are obtained, and the display system includes a first operating mode and a second operating mode. When the display system is in the first working mode, the dimming module is controlled to be in the light-blocking state, and the display module is controlled to have a first display brightness; When the display system is in the second working mode, the dimming module is controlled to be in the light-transmitting state, and the display module is controlled to have a second display brightness, wherein the second display brightness is lower than the first display brightness.

9. The control method for the display system as described in claim 8, characterized in that, The display system further includes a third operating mode, and the control method further includes the following steps: When the display system is in the third working mode, the dimming module is controlled to alternately switch between the light-blocking state and the light-transmitting state, and the display module is controlled to switch between the first display brightness and the second display brightness accordingly. Specifically, when the dimming module is in the light-blocking state, the display module has the first display brightness; when the dimming module is in the light-transmitting state, the display module has the second display brightness.

10. The control method for the display system as described in claim 9, characterized in that, The switching frequency between the display module and the dimming module is greater than 25Hz.

11. The control method for the display system as described in claim 8, characterized in that, The step of controlling the display module to have a second display brightness includes: The display module is controlled to stop working, and the brightness of the second display is set to zero.

12. A head-mounted display device, characterized in that, Includes the display system as described in any one of claims 1 to 7.

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