An ar device and method for dynamically eliminating glare

Abstract

The embodiment of the application provides an AR device and method for dynamically eliminating glare, the AR device comprises a light waveguide module, a detection module, a central control module and an electrochromic module, the detection module can detect the illumination intensity and the incident angle of incident light in real time, the central control module can dynamically control the transmittance of the electrochromic module according to the detected illumination intensity and incident angle, so that the AR device can automatically adapt to different illumination environments, effectively reduces the glare phenomenon and visual interference, and improves the display effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an AR device and method for dynamically eliminating glare. BACKGROUND

[0002] AR devices, such as AR glasses and AR-HUD (head-up display), can superimpose virtual information on the user's field of view, thereby enhancing the user's actual experience. However, in strong light environments (such as direct sunlight or strong outdoor lighting), AR devices are prone to glare phenomenon.

[0003] The glare phenomenon is due to the reflection or transmission of a strong light source (such as the sun) through the display screen, which produces a dazzling light spot. This phenomenon is usually closely related to factors such as the reflectivity of the display screen, the surface smoothness, the incident angle, and the intensity of the ambient light, which easily causes the user to feel uncomfortable when using the AR device, and even affects the readability of the display content, resulting in poor display effect. SUMMARY

[0004] The embodiments of the present application provide an AR device and method for dynamically eliminating glare, aiming to solve the problem of poor display effect caused by glare phenomenon of existing AR devices in strong light environments.

[0005] In a first aspect, the embodiments of the present application provide an AR device for dynamically eliminating glare, comprising a light waveguide module, a detection module, a central control module and an electrochromic module, the detection module, the central control module and the electrochromic module are connected in sequence, the light waveguide module comprises a light waveguide substrate, the light waveguide substrate is provided with at least an entrance pupil area and an exit pupil area, and the electrochromic module is arranged on the light waveguide substrate corresponding to the position of the exit pupil area.

[0006] The detection module is used for detecting the illumination intensity and incident angle of incident light, and the central control module is used for controlling the transmittance of the electrochromic module according to the detected illumination intensity and incident angle.

[0007] Specifically, the electrochromic module comprises a plurality of electrochromic parts arranged in sequence along the longitudinal direction and corresponding to different incident angle ranges, and the plurality of electrochromic parts are connected to the central control module and independently controlled by the central control module.

[0008] Specifically, the included angle formed by the incident angle range controlled by each electrochromic part is less than or equal to 15°.

[0009] Specifically, the thickness and width of each electrochromic part are consistent.

[0010] Specifically, the detection module comprises a plurality of optical sensors or optical fiber sensors arranged close to the electrochromic module.

[0011] Specifically, the AR device is AR glasses or AR-HUD.

[0012] In a second aspect, an embodiment of the present application provides a method for dynamically eliminating glare, applied to the AR device as described above, comprising:

[0013] The detection module detects the illumination intensity and the incident angle of the incident light, and sends information of the illumination intensity and the incident angle to the central control module;

[0014] The central control module controls the transmittance of the electrochromic module according to the detected illumination intensity and incident angle.

[0015] Specifically, the central control module controls the transmittance of the electrochromic module according to the detected illumination intensity and incident angle, comprising:

[0016] Matching the incident angle with the incident angle range of each electrochromic part, and determining the target electrochromic part corresponding to the incident angle according to the matching result;

[0017] Comparing the illumination intensity with a preset intensity threshold;

[0018] If the illumination intensity is greater than or equal to the preset intensity threshold, then controlling the target electrochromic part to adjust the transmittance according to the difference between the illumination intensity and the preset intensity threshold, so that the illumination intensity of the light transmitted through the target electrochromic part is lower than the preset intensity threshold.

[0019] Specifically, the method for dynamically eliminating glare further comprises:

[0020] Obtaining the average brightness of the current environment, and adjusting the preset intensity threshold according to the average brightness.

[0021] Specifically, the method for obtaining the average brightness of the current environment and adjusting the preset intensity threshold according to the average brightness, comprising:

[0022] Comparing the average brightness with a preset brightness threshold;

[0023] If the average brightness is greater than or equal to the preset brightness threshold, then adjusting the preset intensity threshold to a first intensity threshold;

[0024] If the average brightness is less than the preset brightness threshold, then adjusting the preset intensity threshold to a second intensity threshold, wherein the first intensity threshold is greater than the second intensity threshold.

[0025] The embodiment of the application provides an AR device and method for dynamically eliminating glare, the AR device comprises a light waveguide module, a detection module, a central control module and an electrochromic module, the detection module can detect the illumination intensity and the incident angle of incident light in real time, the central control module can dynamically control the transmittance of the electrochromic module according to the detected illumination intensity and incident angle, so that the AR device can automatically adapt to different light environments, effectively reduces the glare phenomenon and visual interference, and improves the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A structural schematic diagram of an AR device for dynamically eliminating glare provided by the first embodiment of the application;

[0028] Figure 2 A top view of an AR device for dynamically eliminating glare provided by the first embodiment of the application;

[0029] Figure 3 A schematic diagram of the incident angle range of each electrochromic part provided by the first embodiment of the application;

[0030] Figure 4 A structural schematic diagram of an AR device for dynamically eliminating glare provided by the second embodiment of the application;

[0031] Figure 5 A structural schematic diagram of an AR device for dynamically eliminating glare provided by the third embodiment of the application;

[0032] Figure 6 A structural schematic diagram of the detection module;

[0033] Figure 7 A structural schematic diagram of an AR device for dynamically eliminating glare provided by the fourth embodiment of the application;

[0034] Figure 8 A structural schematic diagram of an AR device for dynamically eliminating glare provided by the fifth embodiment of the application;

[0035] Figure 9 A flowchart of a method for dynamically eliminating glare provided by the embodiment of the application Figure 1

[0036] Figure 10 A sub-flowchart of Figure 9 ;​

[0037] Figure 11 Flowchart of a method for dynamically eliminating glare provided by an embodiment of the present application Figure 2 ;

[0038] Figure 12 Flowchart of a method for dynamically eliminating glare provided by an embodiment of the present application Figure 10 .

[0039] Explanation of the symbols in the figures:

[0040] 1, optical waveguide substrate; 11, entrance pupil area; 12, exit pupil area;

[0041] 2, electrochromic module; 21, electrochromic part;

[0042] 3, detection module;

[0043] 4, central control module;

[0044] 5, AR glasses; 51, frame; 52, frame; 53, connecting line. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] It should be understood that the terms “comprise” and “include” as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0047] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0048] It should be further understood that the term “and / or” as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0049] Please refer to Figure 1 and Figure 2The embodiment of the application provides an AR device capable of dynamically eliminating glare, which comprises a light waveguide module, a detection module 3, a central control module 4 and an electrochromic module 2, wherein the detection module 3, the central control module 4 and the electrochromic module 2 are sequentially connected, the light waveguide module comprises a light waveguide substrate 1, the light waveguide substrate 1 is provided with at least an entrance pupil area 11 and an exit pupil area 12, and the electrochromic module 2 is arranged on the light waveguide substrate 1 at a position corresponding to the exit pupil area 12.

[0050] The detection module 3 is used for detecting the illumination intensity and the incident angle of incident light, and the central control module 4 is used for controlling the transmittance of the electrochromic module 2 according to the detected illumination intensity and incident angle.

[0051] In the embodiment, the entrance pupil area 11 is an area where light enters the light waveguide substrate 1 and corresponds to the position of the user's eyes, and the exit pupil area 12 is an area where light is emitted from the light waveguide substrate 1 and is an area where the user observes an AR image, the entrance pupil area 11 and the exit pupil area 12 can be arranged on the same side or on opposite sides, but it should be noted that the electrochromic module 2 can be arranged on the opposite side of the exit pupil area 12 or on the same side of the exit pupil area 12, when arranged on the same side, the electrochromic module 2 can be arranged outside the exit pupil area 12 or between the exit pupil area 12 and the light waveguide substrate 1, but not arranged on the same side as the entrance pupil area 11. The detection module 3 can detect the illumination intensity and the incident angle of incident light, and the central control module 4 (not marked) Figure 1 and Figure 2 can control the transmittance of the electrochromic module 2 according to the detected illumination intensity and incident angle, specifically, when a light source is detected, it can be judged whether it is strong light or weak light according to the detected illumination intensity, if it is strong light, the central control module 4 controls the electrochromic module 2 to reduce the transmittance according to the detected incident angle, so as to block the light that is too strong from shining on the exit pupil area 12, so as to prevent the generation of glare; if it is weak light, the central control module 4 controls the electrochromic module 2 to increase the transmittance according to the detected incident angle, so as to ensure the definition and brightness of the AR image. The embodiment can automatically adapt to different lighting environments by real-time detection of the illumination intensity and the incident angle of incident light and dynamic adjustment of the transmittance of the electrochromic module according to the data, effectively reduces the glare phenomenon and visual interference, and improves the user's use comfort. In addition, if the light is too strong, it will also cause rainbow pattern phenomenon due to diffraction, therefore, when the transmittance of the electrochromic module 2 is reduced, that is, when the strong light is blocked, the rainbow pattern effect can also be reduced. In the formula, Figure 2 f is the incident light.

[0052] In a specific implementation, the central control module 4 controls the electrochromic module 2 to adjust the transmittance in the following manner: controlling the voltage size and direction input to the electrochromic module 2 to reduce or increase the transmittance, when the transmittance is the lowest, the electrochromic module 2 is closed, when the electrochromic module 2 is opened, the transmittance is different, when the electrochromic module 2 is fully transparent, the transmittance is the largest.

[0053] Specifically, as shown in Figures 3-5 The electrochromic module 2 includes a plurality of electrochromic parts 21 arranged in sequence along the longitudinal direction and corresponding to different incident angle ranges, and each of the plurality of electrochromic parts 21 is connected to the central control module 4 and is independently controlled by the central control module.

[0054] In actual application, the source and incident angle of glare may change, and the embodiment is only for longitudinal angle and glare, so each electrochromic part 21 is arranged longitudinally, and the detection module 3 is arranged on the same side as the electrochromic module 2, so that the angle detected by the detection module 3 is the same as the angle of light irradiated on each electrochromic part. Each electrochromic part 21 in the embodiment corresponds to a specific incident angle range, so that the AR device can accurately control the glare in different directions to reduce the glare, while maintaining the image clarity and brightness in each direction, improving the adaptability and practicality of the AR device. Moreover, when adjusting the transmittance, the electrochromic module 2 will consume a certain amount of energy, and the embodiment connects a plurality of electrochromic parts 21 to the central control module 4 (which can be connected through a connection line 53, refer to Figure 8 ), and controls each electrochromic part 21 independently through the central control module 4, so that the AR device can adjust only the electrochromic part 21 that needs to be adjusted according to actual needs (refer to Figure 4 and Figure 5 ), without the need to adjust all electrochromic parts 21, thereby reducing unnecessary energy consumption and improving the energy-saving effect of the AR device.

[0055] In combination with Figure 3 , only for light from the top of the head, such as when wearing glasses, the overhead fluorescent lamp irradiates, the electrochromic module 2 includes 6 electrochromic parts 21, Figure 3The center of the electrochromic module 2 determines the incident angle range controlled by each electrochromic part 21, wherein the angle θ1 between the light rays c and d is the incident angle range that the uppermost electrochromic part 21 in the longitudinal direction can control the light rays to pass through. In order to obtain this range, the thickness and length of the electrochromic part 21 need to be known, which can be obtained when the electrochromic part is made. Assuming that the thickness of the electrochromic part 21 is a and the width is b, the size of the incident angle range θ1 can be obtained by geometric relationship, which is equal to 90-arctan(2b / a). That is, the light ray angle of the uppermost electrochromic part 21 is between (2b / a)° and 90°. As long as the light rays in this incident angle range are met, they are controlled by the electrochromic part 21. The specific control process is determined by the size of the light intensity. For example, when the light intensity is higher than a certain intensity threshold, the central control module 4 controls the uppermost electrochromic part 21 to change color (close) to block the light rays of this angle. When the light intensity is lower than a certain intensity threshold, the electrochromic part 21 is opened again. For example, if 2b / a is equal to 80°, the electrochromic part 21 will be closed when the light intensity of an 82° light ray is too high. The angle θ2 between the light rays d and e is the angle range that the second electrochromic part 21 from the top in the longitudinal direction can control the light rays to pass through. The determination of this angle range can refer to the foregoing steps. The angle range controlled by other electrochromic parts 21 can also be determined according to the foregoing steps, which will not be described here. It should be noted that all the electrochromic parts 21 are divided along the middle electrochromic part 21. The incident angle range controlled by the electrochromic parts 21 below the middle electrochromic part 21 is the same as the incident angle range of the electrochromic parts 21 above the middle electrochromic part 21. However, the incident angle range below is a negative angle range relative to the incident angle range above. That is, when the angle range controlled by the topmost electrochromic part 21 is 80-90°, the angle range controlled by the bottommost electrochromic part 21 is -80--90°.

[0056] Specifically, as shown in FIG. 4, the included angle of the incident angle ranges controlled by each electrochromic part 21 is less than or equal to 15°. Figure 3

[0057] ​In this embodiment, if the incident angle range controlled by one electrochromic part 21 is too large, it is easy to cause "injury", for example, the incident angle range controlled by one electrochromic part 21 is 30°, if only a small range (such as 2°) of light intensity of light exceeds the intensity threshold, then the entire electrochromic part 21 will be closed, that is, the light in the entire 30° range will be blocked, but only a small range of light needs to be blocked, so this is not conducive to the display effect of the AR device, therefore, the incident angle range controlled by each electrochromic part 21 can be set to be small, and the included angle formed by the incident angle ranges controlled by each electrochromic part 21 is also small, so that the control of light is more accurate. For the setting of the incident angle range, the width and thickness of each electrochromic part 21 can be adjusted in the implementation process, for example, the width b can be made a little wider or the thickness a can be made a little smaller, and then more electrochromic parts 21 are set to control the light at each angle. In theory, the smaller the incident angle range controlled by each electrochromic part 21, the smaller the included angle formed by the incident angle ranges controlled by each electrochromic part 21, and the more accurate the control of light, but considering the process difficulty and other factors, it is preferred that the included angle formed by the incident angle ranges controlled by each electrochromic part 21 is less than or equal to 15°. Among them, when the included angle formed by the incident angle ranges controlled by each electrochromic part 21 is known, the incident angle range controlled by each electrochromic part 21 can also be known, and the incident angle ranges of each electrochromic part 21 are connected, for example, the included angle formed by the incident angle ranges controlled by each electrochromic part 21 is 10°, then the incident angle control range of the topmost electrochromic part 21 is 80°-90°, and the incident angle range of the next electrochromic part is 70°-80°. The included angle formed by the incident angle ranges controlled by each electrochromic part 21 is an included angle value, for example, the included angle formed by the incident angle ranges of the topmost electrochromic part 21 and the adjacent electrochromic part 21 can be 10°, and the incident angle range controlled by each electrochromic part 21 is shown in Figure 3 If the included angle θ1 of the light ray c and the light ray d is 10°, then the incident angle range controlled by the topmost electrochromic part 21 is 80°-90°, and the included angle θ2 of the light ray d and the light ray e is 8°, then the incident angle range controlled by the next electrochromic part 21 is 72°-80°.

[0058] In combination with Figure 4As shown, assuming the included angle between the angle range controlled by each electrochromic part 21 is 15°, in the process of using the AR device by the user, such as walking outdoors wearing AR glasses, two dazzling small light sources (f1 and f2) suddenly appear in front, the incident angle range of f1 is 15°-30°, and the incident angle range of f2 is 60°-75°, then the voltage of the two electrochromic parts 21 is changed from full transmission to the corresponding transmittance, for example, the average brightness of the environment at this time is 600 nit, and the brightness of the two sub-light sources is 1000 nit and 1200 nit respectively, then the transmittance of the corresponding electrochromic part 21 of the former is adjusted to below 60%, and the transmittance of the corresponding electrochromic part 21 of the latter is adjusted to below 50%, so that the light of the two incident angles is within a reasonable range, and the transmittance of the electrochromic part 21 at other angles does not change, thereby ensuring the overall transparency.

[0059] In combination Figure 5 As shown, two dazzling small light sources (f3 and f4) suddenly appear in front, the incident angle range of f3 is 65°-75°, and the light source f4 is incident on the water pool below, which causes the electrochromic part 21 in the incident angle range below to also have glare after reflection, so the corresponding two electrochromic parts 21 need to be adjusted to the appropriate transmittance.

[0060] Specifically, as shown in Figures 3-5 As shown, the thickness and width of each electrochromic part 21 are consistent.

[0061] In this embodiment, in order to make the included angle of the incident angle of each electrochromic part 21 more accurate, the thickness and width of each electrochromic part 21 are set to be consistent, so that the incident angle range controlled by each electrochromic part 21 is more connected and more comprehensive.

[0062] In specific implementation, the light transmittance of the electrochromic material in the electrochromic part 21 is closely related to the voltage (or current) applied thereto, generally, the transmittance of the electrochromic material changes with the change of the voltage, that is, the application of positive or negative voltage causes the change of the optical properties of the material, according to the size and direction of the voltage, the transparency of the electrochromic material can be gradually adjusted from completely transparent to completely opaque. For too strong glare, it is not necessary to completely block, but to weaken it below a certain intensity threshold to be transmitted, so as not to affect the display effect. For example, the transmittance of the electrochromic part is reduced to 70%, 50%, etc. Among them, the electrochromic material can be tungsten oxide, molybdenum oxide, etc., then the electrochromic part 21 is directly made and attached to the surface of the light waveguide substrate 1 corresponding to the exit pupil area 12, and the edges of each electrochromic part 21 respectively lead the connection line 53, which is connected with the central control module 4 through the connection line 53.

[0063] Specifically, the detection module 3 includes a plurality of optical sensors or fiber sensors arranged close to the electrochromic module 2.

[0064] In this embodiment, when the detection module 3 includes a plurality of optical sensors, the plurality of sensors form an array, and the plurality of optical sensors inside the array can receive light intensity at different positions and can infer the incident angle of the incident light, combined with the Figure 6 As shown, there are a total of 4 optical sensors, and when detecting light intensity, different optical sensors usually detect different energies, so that the incident direction of the light can be determined, but sometimes, the energy received by different optical sensors is almost the same, which includes three cases, the first case is no glare, that is, the light intensity of the incident light does not exceed the intensity threshold, so that the energy in each direction in the environment is consistent; the second case is that there is glare, and the area range of the glare is too large, causing the entire display area to be too dazzling, such as a flashlight suddenly appearing in front of the eyes and shaking, which can be referred to as Figure 7 At this time, all electrochromic parts are irradiated; the third case is that the scene is suddenly switched from one scene to another, and the brightness difference between the two scenes is large, and the central control module 4 can process different situations according to different situations, specifically, for the first case, no processing is required, for the second case, all electrochromic parts 21 are adjusted to a suitable transmittance, if the detected brightness is constant or slightly fluctuates, it belongs to the third case, that is, it is switched to a new scene, then the intensity threshold suitable for the new scene is adjusted, and then the transmittance of the electrochromic module 2 is adjusted according to the light intensity and the intensity threshold of the new scene, at this time, if the light intensity does not exceed the intensity threshold of the new scene, all electrochromic parts 21 are turned on to be completely transparent. In specific implementation, the number of optical sensors can be set as needed.

[0065] When the detection module 3 includes a fiber sensor, the incident light irradiates the fiber sensor, and the refraction or reflection of the light changes, at this time, based on the change of the reflection spectrum of the fiber or the change of the Bragg wavelength, the incident angle of the light can be calculated, and then the transmittance of each electrochromic part 21 is adjusted according to the light intensity and the intensity threshold.

[0066] Specifically, the AR device is AR glasses or AR-HUD.

[0067] In this embodiment, when the AR device is AR glasses, in a strong light environment outdoors, such as direct sunlight, the detection module of the AR glasses will monitor the light intensity in real time, and when the light intensity exceeds the set light intensity threshold, the corresponding electrochromic part will automatically adjust the transmittance, reduce the stimulation of strong light to the eyes, and block the generation of glare. At the same time, these electrochromic parts can intelligently adjust their light transmittance according to the changes of light sources at different angles, to ensure that the display content of the glasses is always clear and visible. Specifically, combined with Figure 8As shown, the AR glasses include a frame 51 and a frame 52. The detection module 3 can be positioned above the exit pupil area 12 near the waveguide module, i.e., placed on the upper frame, or it can be positioned on the side of the exit pupil area 12 (i.e., the side frame). However, it is preferred to position it on the upper frame for a more aesthetically pleasing design. The central control module 4 is located inside the frame 51 or the frame 52. The electrochromic module 2 is positioned at the corresponding exit pupil area 12. If it is only positioned in the corresponding exit pupil area 12, it is not conducive to concealing the connection line 53 between the electrochromic module 2 and the central control module 4. Therefore, the electrochromic module 2 can be positioned over a larger area, with its edge connecting to the frame 51 or the frame 52, thereby concealing the connection line 53 between the two and making the AR glasses more aesthetically pleasing. Frames 51 are provided on both the side and top of the waveguide module. The detection module 3 is positioned on the upper frame, with the electrochromic module 2 below it. The connection line 53 of the detection module 3 is located inside the upper frame. Figure 8 Not shown in the diagram, these connecting lines 53 can be connected to the central control module 4. The central control module 4 can also be set on the upper frame or placed inside the frame 52. These can all be connected by connecting lines 53 hidden inside the frame 51. The inside of the frame 51 is hollow. The edge of the electrochromic module 2 fits against the side frame. The connecting lines 53 of each electrochromic part 21 are located inside the frame 51 and connected to the central control module 4.

[0068] When the AR device is an AR-HUD (Head-Up Display), it is typically used in automotive applications. During driving, the AR-HUD provides crucial data such as real-time navigation, vehicle speed, and driving information. When the driver is in a bright light environment, such as under direct midday sunlight or when illuminated by oncoming headlights, the detection module 3 can monitor the intensity and angle of the incident light and instruct the corresponding electrochromic element to adjust its transmittance, blocking the strong light and preventing glare from affecting the driver, thus ensuring the readability and safety of driving information.

[0069] In practical applications, AR devices are also used in industrial / medical environments. In these environments, AR devices are often exposed to strong light, such as factory lighting or medical equipment light sources. AR devices can sense and adapt to lighting conditions in real time, automatically adjusting display brightness and transmittance to provide a comfortable user experience and avoid strong light interference affecting the display accuracy of AR devices.

[0070] like Figure 9 As shown, this embodiment of the invention also provides a method for dynamically eliminating glare, applied to the AR device described above, including steps S10-S20:

[0071] S10. The detection module 3 detects the light intensity and incident angle of the incident light, and sends the information of the light intensity and incident angle to the central control module 4.

[0072] S20, the central control module 4 controls the transmittance of the electrochromic module 2 according to the detected light intensity and incident angle.

[0073] In this step, the light intensity and incident angle of the incident light detected by the detection module 3 are received by the central control module 4. The central control module 4 can correspondingly adjust the transmittance of the electrochromic module 2 according to the light intensity to determine whether it is strong light or weak light. If it is strong light, the central control module 4 controls the electrochromic module 2 to reduce the transmittance according to the detected incident angle, so as to block the too strong light from shining on the exit pupil area 12, so as to prevent the generation of glare. If it is weak light, the central control module 4 controls the electrochromic module 2 to increase the transmittance according to the detected incident angle.

[0074] Specifically, as shown in FIG. 8, S20 includes: Figure 10

[0075] S21, match the incident angle with the incident angle range of each electrochromic part 21, and determine the target electrochromic part corresponding to the incident angle according to the matching result;

[0076] S22, compare the light intensity with the preset intensity threshold;

[0077] S23, if the light intensity is greater than or equal to the preset intensity threshold, control the target electrochromic part 21 to adjust the transmittance according to the difference between the light intensity and the preset intensity threshold, so that the light intensity transmitted through the target electrochromic part 21 is lower than the preset intensity threshold.

[0078] In this step, each electrochromic part 21 has its own controlled incident angle range. When the incident angle of the incident light is detected, the incident angle is matched with the incident angle range of each electrochromic part 21, and then the target electrochromic part 21 to be controlled is determined. Then, the light intensity of the incident light is compared with the preset intensity threshold, and the transmittance is reduced or increased according to the comparison result. Since this embodiment is aimed at the generation of glare in strong light environment, this embodiment only reduces the transmittance of the incident light whose light intensity is greater than or equal to the preset intensity threshold. The specific reduction of the transmittance can be determined according to the difference between the light intensity and the preset intensity threshold, so that the light intensity of the incident light after being transmitted through the target electrochromic part 21 is lower than the preset intensity threshold, so that the display effect of the AR device is better. This embodiment adjusts the transmittance according to the light source at different angle directions, so that the AR device can adapt to the external environmental light incident from each direction.

[0079] ​For the preset intensity threshold, it can be set according to different application scenarios. In an indoor environment (low brightness background), when the brightness exceeds 300-500 nit, the human eye will begin to feel dazzling, especially in a dark room, if the brightness exceeds 700 nit, it will be generally considered too bright, therefore, in this case, the intensity threshold of the detection module can be set to 500 nit, while in an outdoor environment (daylight), the human eye can adapt to higher brightness, and the threshold of dazzling will generally be increased to 2000 nit or even higher, therefore, at this time, the intensity threshold of the detection module 3 can be set to about 2000 nit.

[0080] Specifically, as shown in Figure 11 The method for dynamically eliminating glare further comprises:

[0081] S30, acquiring the average brightness of the current environment, and adjusting the preset intensity threshold according to the average brightness.

[0082] In this step, the size of the preset intensity threshold can be set according to the environment in which the AR device is used, therefore, the central control module 4 can dynamically adjust the preset intensity threshold according to the average brightness of the current environment acquired in real time, to adapt to the needs under different lighting conditions.

[0083] Specifically, as shown in Figure 12 S30 comprises:

[0084] S31, comparing the average brightness with a preset brightness threshold;

[0085] S32, if the average brightness is greater than or equal to the preset brightness threshold, adjusting the preset intensity threshold to a first intensity threshold;

[0086] S33, if the average brightness is less than the preset brightness threshold, adjusting the preset intensity threshold to a second intensity threshold, wherein the first intensity threshold is greater than the second intensity threshold.

[0087] In this step, the AR device is used in an environment, the average brightness of the environment is basically consistent, when the average brightness of the environment is in an indoor environment or a low brightness environment, for example, below 100 nit, the preset intensity threshold can be adjusted to a first intensity threshold, for example, above 300 nit, when the average brightness of the environment is in an outdoor environment or a high brightness environment, for example, above 1000 nit, the preset intensity threshold can be adjusted to a second preset intensity threshold, for example, 2000 nit, the first intensity threshold and the second preset intensity threshold can be determined according to specific scene requirements. In this way, even if the AR device changes from one environment to another, the preset intensity threshold can be adjusted automatically to improve the display effect of the AR device, for example, when the AR device is an AR-HUD, it will usually experience a change from a bright daytime environment to a tunnel, the brightness difference between the two environments is huge, so the preset intensity threshold of the two environments should also be adjusted when the scene is switched.

[0088] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An AR device that dynamically eliminates glare, characterized by, The device includes an optical waveguide module, a detection module, a central control module, and an electrochromic module. The detection module, central control module, and electrochromic module are connected in sequence. The optical waveguide module includes an optical waveguide substrate. The optical waveguide substrate has at least an entrance pupil region and an exit pupil region. The electrochromic module is located on the optical waveguide substrate at a position corresponding to the exit pupil region. The detection module is used to detect the light intensity and incident angle of the incident light, and the central control module is used to control the transmittance of the electrochromic module according to the detected light intensity and incident angle. The electrochromic module includes multiple electrochromic parts arranged sequentially along the longitudinal direction and corresponding to different incident angle ranges. Each of the multiple electrochromic parts is connected to the central control module and is independently controlled by the central control module. The included angle formed by the incident angle range controlled by each of the electrochromic parts is less than or equal to 15°.

2. The AR device of claim 1, wherein, The thickness and width of each electrochromic part are consistent.

3. The AR device of claim 1, wherein, The detection module includes multiple optical sensors or fiber optic sensors positioned close to the electrochromic module.

4. The AR device of claim 1, wherein, The AR device is AR glasses or AR-HUD.

5. A method for dynamically eliminating glare, applied to an AR device as described in any one of claims 1-4, characterized in that, include: The detection module detects the light intensity and incident angle of the incident light, and sends the information of the light intensity and incident angle to the central control module; The central control module controls the transmittance of the electrochromic module based on the detected light intensity and incident angle.

6. The method for dynamically eliminating glare according to claim 5, applied to the AR device according to any one of claims 2-4, characterized in that, The central control module controls the transmittance of the electrochromic module based on the detected light intensity and incident angle, including: The incident angle is matched with the incident angle range of each electrochromic part, and the target electrochromic part corresponding to the incident angle is determined according to the matching result. The light intensity is compared with a preset intensity threshold. If the light intensity is greater than or equal to the preset intensity threshold, the transmittance of the target electrochromic part is adjusted according to the difference between the light intensity and the preset intensity threshold, so that the light intensity passing through the target electrochromic part is lower than the preset intensity threshold.

7. The method for dynamically eliminating glare according to claim 6, characterized in that, Also includes: Obtain the average brightness of the current environment, and adjust the preset intensity threshold based on the average brightness.

8. The method for dynamically eliminating glare according to claim 7, characterized in that, The step of obtaining the average brightness of the current environment and adjusting the preset intensity threshold based on the average brightness includes: The average brightness is compared with a preset brightness threshold. If the average brightness is greater than or equal to the preset brightness threshold, then the preset intensity threshold is adjusted to the first intensity threshold. If the average brightness is less than the preset brightness threshold, the preset intensity threshold is adjusted to the second intensity threshold, wherein the first intensity threshold is greater than the second intensity threshold.

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