Smart glasses with display function

Abstract

The present application is applicable to the field of smart wearable products. Provided is a pair of smart glasses with a display function. The smart glasses comprise a glasses frame, lenses, and temples, wherein nose pads are provided on rims of the glasses frame. The smart glasses further comprise: a first optical device, which is arranged on the inner side surface of the smart glasses and is configured to emit a light beam carrying image information; and a second optical device, which is located on the nose pad or on the rim where the nose pad is located, directly faces a light exit surface of the first optical device and is configured to guide the light beam towards the eyes of a wearer. In the smart glasses provided in the present application, ambient light on two sides of each lens can be freely transmitted in two directions, and there is no blind area of sight when the wearer views from either side to the other side, thereby improving the user experience. Moreover, such a display method has no requirement for the type of the lenses, and does not require special optical waveguide lenses, which can reduce costs to a certain extent; and the smart glasses can be compatible with any traditional lens, such as a sunglass lens, a photochromic lens, a blue-light blocking lens, and a prescription lens.

Description

Smart glasses with display function

[0001] This application claims priority to Chinese patent application No. CN 2025103519992, filed on March 24, 2025, entitled "Smart Glasses with Display Function", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of smart wearable products, and in particular relates to a smart glasses with display function. Background Technology

[0003] Smart wearable devices are a general term for wearable devices that are designed and developed with intelligent features for everyday wearable items, such as watches, bracelets, glasses, and clothing. Among them, smart glasses can be considered a representative type of smart wearable device, which is being applied to all aspects of people's lives, work, and entertainment.

[0004] Smart glasses typically include AR glasses, VR glasses, and AI glasses, integrating artificial intelligence technology and featuring functions such as voice interaction, translation, photography, navigation, and display. They can translate languages ​​in real time, record memorable moments, and provide a convenient user experience. For example, some AI smart glasses can easily take photos and videos while skiing, cycling, or driving, and also support voice control for playing music and starting navigation. Furthermore, some AR and AI smart glasses have near-eye display capabilities, projecting images, text, and video information directly into the user's field of vision to provide navigation instructions, message notifications, and schedule reminders. This improves information acquisition efficiency, interaction convenience, and immersive experience, while also protecting privacy, as the displayed content cannot be seen by others, making them suitable for use in public places.

[0005] Eyeglasses with near-eye display capabilities should ideally meet the following requirements: 1. From an aesthetic design perspective, the eyepiece optics used for near-eye display should not appear obtrusive when viewed by a third party. 2. From the perspective of everyday wearability, the eyepiece optics should minimize obstruction of the user's field of vision when observing the outside world through the smart glasses. 3. From the perspective of viewing the displayed image, the image presented by the eyepiece optics should be projected in a position easily accessible to the user. 4. Minimal modifications to the lenses are preferable, and compatibility with various lens types should be maximized.

[0006] As shown in Figure 1A, the structural principle of an existing smart glasses is as follows: a waveguide is set in region A of the lens 11, and an optical engine 12 is set on the frame or temple. The waveguide has several semi-transparent and semi-reflective films 111. When the image source light emitted by the optical engine 12 enters the waveguide, it is constrained to be transmitted inside the waveguide due to the total internal reflection of the inner wall of the waveguide. Each time the light passes through a semi-transparent and semi-reflective film 111, a portion of the image source light is reflected to the wearer's eye. Finally, the wearer can see the image displayed by the optical engine 12.

[0007] However, the near-eye display method shown in Figure 1A has certain drawbacks. Although the wearer can see both ambient light and image source light simultaneously, because no light passes through area A from the side where the wearer is located to reach the opposite side, there is a blind spot on the lens corresponding to area A when looking at the wearer from the opposite side. The other person cannot see the wearer's eyes, leading to a poor experience in interaction and communication, as shown in Figure 1B. The main reason is that the waveguide in the image source light path blocks ambient light from transmitting from the wearer's side to the other. Furthermore, this type of glasses requires the use of special waveguide lenses, which does not meet the requirements of point 4 above.

[0008] Another type of smart glasses uses a projection method for near-eye display, as shown in Figure 2. The lens 21 has a reflective area 23. The image source beam emitted by the optical engine 22 is projected onto the reflective area 23, which then guides the beam to the eye. However, because the reflective area 23 on the lens 21 blocks some ambient light, this technology does not meet the requirements of point 2 above. Furthermore, it requires a dedicated reflective area 23 on the lens 21, which also does not meet the requirements of point 4 above.

[0009] Another type of smart glasses hides the optical engine inside the upper frame, projecting the light beam directly to the eyes. While this meets the requirements of points 1 and 2 above, it requires the wearer to look upwards to see the display content. Prolonged upward looking can cause eye strain and dizziness, failing to meet the requirement of point 3. Furthermore, there are few situations in daily life where looking upwards is necessary; therefore, the wearer's frequent upward gaze appears very strange to a third party. In addition, a small display device needs to be integrated into the eyepiece optics, which introduces another problem: the display device requires power and image signals, which must be transmitted through the frame. This results in a thicker upper frame, which is aesthetically undesirable, especially for high-resolution displays that require more wiring. Technical issues

[0010] The technical problem to be solved by this application is to provide a smart glasses with display function. The optical element used to realize the display function in the smart glasses does not affect the bidirectional transmission of ambient light on both sides of the lens, avoids blind spots, improves the user experience, and is compatible with any traditional lens. Technical solutions

[0011] To solve the above-mentioned technical problems, this application provides a smart glasses with a display function, including a frame, lenses, and temples, with a nose pad provided on the edge of the frame; it also includes:

[0012] A first optical device is disposed on the inner side of the smart glasses for emitting a light beam carrying image information.

[0013] The second optical device is located on the nose pad or on the frame where the nose pad is located, and is directly opposite the light-emitting surface of the first optical device, for guiding the light beam toward the wearer's eyes. Beneficial effects

[0014] In the smart glasses provided in this application, a first optical device is disposed on the inner side, and a second optical device is disposed on the nose pad or on the frame of the glasses where the nose pad is located. After the first optical device emits a beam of light carrying image information, the second optical device guides the beam of light toward the wearer's eyes, allowing the wearer to view the displayed image. Since neither the first nor the second optical device is disposed on the lens, ambient light can freely transmit in both directions on both sides of the lens. That is, ambient light can pass through the lens from the inner side (the side where the wearer's eyes are located) to the outer side (the side opposite to or opposite to the inner side), and it can also pass through the lens from the outer side to the inner side. There is no blind spot when looking from one side to the other, which improves the user experience. Furthermore, this display method does not require specific lens types, does not require special waveguide lenses or other specially customized lenses, which can reduce costs to a certain extent. It can be used with any lens, such as sunglass lenses, photochromic lenses, blue light blocking lenses, prescription lenses, etc. Attached Figure Description

[0015] Figure 1A is an optical schematic diagram of smart glasses with near-eye display function provided by the prior art;

[0016] Figure 1B is a diagram showing the effect of looking at the wearer's eyes from the opposite side after wearing the smart glasses shown in Figure 1A;

[0017] Figure 2 is an optical principle diagram of a near-eye display-based smart glasses provided by the prior art;

[0018] Figure 3 is a structural diagram of the smart glasses provided in this application;

[0019] Figure 4 is a partially enlarged schematic diagram of the first optical device in Figure 3;

[0020] Figure 5 is a structural schematic diagram of the smart glasses provided in this application, which are equipped with a first type of first orientation adjustment device;

[0021] Figure 6 is an exploded structural diagram of the first type of first orientation adjustment device and first optical device provided in this application;

[0022] Figure 7 is a structural schematic diagram of the second type of first orientation adjustment device provided in this application;

[0023] Figure 8 is a structural schematic diagram of the smart glasses provided in this application, which are equipped with a first type of second orientation adjustment device;

[0024] Figure 9 is an enlarged view of region A in Figure 8;

[0025] Figure 10 is a schematic diagram of the structure of the smart glasses provided in this application, which are equipped with a second type of second-position adjustment device;

[0026] Figure 11 is an enlarged view of region B in Figure 10;

[0027] Figure 12 is a structural schematic diagram of the smart glasses provided in this application, which are equipped with a fourth type of second-position adjustment device;

[0028] Figure 13 is an enlarged view of region C in Figure 12.

[0029] Figure 14A is a first structural diagram of the second optical device provided in this application;

[0030] Figure 14B is an equivalent optical path diagram of the light beam passing through the second optical device shown in Figure 14A;

[0031] Figure 15 is a second structural diagram of the second optical device provided in this application;

[0032] Figure 16 is a schematic diagram of the first optical structure of the smart glasses provided in this application;

[0033] Figure 17 is a schematic diagram of the second optical structure of the smart glasses provided in this application;

[0034] Figure 18 is a schematic diagram of the third optical structure of the smart glasses provided in this application;

[0035] Figures 19A and 19B are two structural diagrams of the prism provided in this application, respectively.

[0036] Figure 20 is a schematic diagram of the partition design principle of the inner side of the frame of the smart glasses provided in this application;

[0037] Figure 21 is a schematic diagram of the line of sight angle when the second optical device is placed in region T in Figure 20;

[0038] Figures 22A and 22B are schematic diagrams of line-of-sight obstruction when the second optical device is located in region T and region N in Figure 20, respectively.

[0039] Figure 23 is a schematic diagram of the visual field of the left and right eyes in people's daily lives;

[0040] Figure 24 is a schematic diagram showing the positions of the first optical device and the second optical device;

[0041] Figure 25 is a schematic diagram that further adds exemplary values ​​to Figure 24;

[0042] Figure 26 is a schematic diagram of the appearance of Figure 25 as viewed from a third party;

[0043] Figure 27 is a schematic diagram of the electrical module of the smart glasses provided in this application. Embodiments of the present invention

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] The smart glasses provided in this application have a display function, which can guide displayed images, videos, and other image information to the wearer's eyes in the form of projection reflection. The smart glasses can be AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, or AI glasses, and have one or more functions such as voice interaction, translation, photography, navigation, and display.

[0046] Figure 3 illustrates the external structure of the smart glasses provided in this application. Referring to Figure 3, the smart glasses include a frame 31, two lenses 32, and two temples 33. The lenses 32 are fixedly installed within the frame 31. The lenses 32 can be sunglass lenses, photochromic lenses, blue light blocking lenses, or prescription lenses for myopia, astigmatism, etc. It should be noted that Figure 3 only exemplarily shows the external shape of the smart glasses. In specific implementations, other structural designs can be added according to the needs of the application scenario. For example, a helmet structure can be added to the main body of the glasses, or a headband can be designed at the ends of the two temples for connection. These are all covered within the protection scope of this application.

[0047] The frame 31 can be designed in various shapes such as square, oval, and round. The frame 311 near the bridge of the nose is provided with a nose pad 34, and the smart glasses are supported on the bridge of the wearer's nose by the nose pad 34.

[0048] The temple 33 can be equipped with various electronic components, such as a rechargeable battery, speaker, microphone, 9-axis sensor, Bluetooth module, sensor, camera, touch sensor, memory, processor, etc., depending on specific needs. In practice, all or some of these electronic components can be integrated, or other necessary components can be added. Alternatively, some of these electronic components can be integrated into the frame 31.

[0049] The frame 31 and the temple 33 are connected by a hinge. Specifically, the two sides of the frame 31 bend towards the temple 33 to form a post 312, and the temple 33 is hinged to the post 312.

[0050] The smart glasses also include a first optical device 35 and a second optical device 36.

[0051] The first optical device 35 is disposed on the inner side of the smart glasses and is used to emit a light beam carrying image information. The aforementioned inner side refers to the side facing the wearer's skin, which can be the inner side of the head 312 as shown in Figure 3, or the inner side of the temple 33 near the end of the frame 31.

[0052] The second optical device 36 is located on the nose pad 34, or on the frame 311 where the nose pad 34 is located, for example, on the frame 311 within a certain distance (e.g., 0.5 cm) above or below the nose pad 34, and is directly opposite the light-emitting surface of the first optical device 35, for guiding the light beam toward the wearer's eyes.

[0053] Considering that different wearers have different face shapes, such as the relative positions of the ears, nose, and eyes, the smart glasses may also include a first orientation adjustment device 37 in order to accurately project the light beam of the first optical device 35 onto the second optical device 36. The first orientation adjustment device 37 is disposed on the temple 33 and connected to the first optical device 35, and is used to adjust the position and light emission direction of the first optical device 35 on the temple.

[0054] As a preferred embodiment, referring to Figures 5 and 6, the first orientation adjustment device 37 has a sliding groove inside, and the temple 33 is embedded in the sliding groove. The inner side of the first orientation adjustment device 37 has a plug-in part 371, and the inner side of the housing of the first optical device 35 has a slot. The first optical device 35 and the first orientation adjustment device 37 are fixedly connected by plugging and are together arranged around the outer periphery of the temple 33. Pushing the first optical device 35 forward or backward allows the sliding groove to slide forward or backward along the length of the temple 33, thereby realizing the position adjustment of the first optical device 35.

[0055] As another preferred option, referring to Figure 7, the first orientation adjustment device 37 also has a sliding slot inside, and the temple 33 is embedded in the sliding slot, which can also realize the position adjustment of the first optical device 35. The difference from the previous option is that the inner side of the first orientation adjustment device 37 does not have a plug-in part, but has a hinge hole. The inner side of the housing of the first optical device 35 is fixed with a hinge shaft 356. By inserting the hinge shaft 356 into the hinge hole, the first optical device 35 and the first orientation adjustment device 37 are hinged to each other. Thus, the wearer can operate the first optical device 35 to swing up and down relative to the first orientation adjustment device 37 and the temple 33 to realize the dual adjustment of the position and light emission direction (position and orientation of the light transmission window 352) of the first optical device 35. Of course, as a variation of the design in Figure 7 above, the slot can also be designed as a non-sliding structure, with the temple 33 fixedly embedded in the slot. The first orientation adjustment device 36 does not slide in the length direction of the temple, but only relies on the first optical device 35 to swing up and down relative to the first orientation adjustment device 37 and the temple 33 to achieve adjustment of the light output direction.

[0056] Regarding the specific location of the second optical device 36, as one implementation, the second optical device 36 can be located on the frame 311 where the nose pad 34 is located, and the position of the second optical device 36 is below the nose pad 34. This can reduce the risk of interference between the light emitted by the first optical device 36 and the wearer's eyelids or eyelashes.

[0057] The specific installation method between the second optical device 36 and the nose pad 34 or the frame 311 can be, but is not limited to, the following three options:

[0058] Option 1: Directly use the surface of the nose pad 34 or the surface of the frame 311 as the reflective surface, that is, the second optical device 36 is integrally formed on the surface of the nose pad 34 or the surface of the frame 311, and the surface faces the light emission direction of the first optical device 35.

[0059] Option 2: The second optical device 36 is detachably mounted on the surface of the nose pad 34 or the surface of the frame 311, with the surface facing the light emission direction of the first optical device 35. The detachable method can be a snap-fit ​​connection or a screw connection, etc.

[0060] Option 3: The second optical device 36 is fixedly mounted on the surface of the nose pad 34 or the surface of the frame 311, with the surface facing the light emission direction of the first optical device. Unlike Option 2, the second optical device 36 is not detachable from the nose pad 34 / frame 311.

[0061] Furthermore, the smart glasses of this embodiment may also include a second orientation adjustment device, which is disposed on the frame 31 or nose pad 34 and connected to the second optical device 36. By operating the second orientation adjustment device, the position and orientation of the second optical device 36 can be adjusted.

[0062] As a first preferred embodiment, referring to Figures 8 and 9, the second orientation adjustment device includes a sliding block 381, which is cylindrical and slidably fitted onto the connector 39 between the nose pad 34 and the frame 31. Pushing the sliding block 381 allows it to slide back and forth relative to the connector 39, thereby adjusting the front-to-back position of the second optical device 36 relative to the wearer's face. The second optical device 36 is rotatably connected to the bottom end of the sliding block 381. Twisting the second optical device 36 allows it to rotate around the sliding block 381, thus adjusting the orientation of the second optical device 36.

[0063] As a second preferred embodiment, referring to Figures 10 and 11, the second orientation adjustment device includes a sliding block 381 and a flexible arm 382. The sliding block 381 is slidably fitted onto the connector 39 between the nose pad 34 and the frame 31. Pushing the sliding block 381 allows it to slide back and forth relative to the connector 39, thereby adjusting the front-to-back position of the second optical device 36 relative to the wearer's face. One end of the flexible arm 382 is fixedly connected to the sliding block 381, and the other end is fixedly connected to the second optical device 36. The flexible arm 382 has a high degree of freedom; by manipulating the flexible arm 382 to deform it, the second optical device 36 can be positioned in a suitable position and orientation.

[0064] As a third preferred option, the second orientation adjustment device only includes the aforementioned flexible arm 382. The second optical device 36 or the nose pad 34 on which the second optical device 36 is installed is directly fixed to the frame 31 via the aforementioned deformable flexible arm 382 (e.g., steel wire). When the flexible arm 382 deforms due to force, the angle between the second optical device 36 and the first optical device 35 and the wearer's eyes changes, so that the second optical device 36 can guide the light beam toward the wearer's eyes.

[0065] As a fourth preferred embodiment, referring to Figures 12 and 13, the second orientation adjustment device includes a sliding block 381, a hinged mounting base 383, and a ball joint structure 384. The sliding block 381 is slidably fitted onto the connector 39 between the nose pad 34 and the frame 31. Pushing the sliding block 381 allows it to slide back and forth relative to the connector 39, thereby adjusting the front-to-back position of the second optical device 36 relative to the wearer's face. The hinged mounting base 383 is fixedly connected to the sliding block 381, and the ball joint structure 384 is embedded in the mounting cavity of the hinged mounting base 383. The second optical device 36 is fixedly connected to the portion of the ball joint structure 384 that protrudes from the mounting cavity. By operating the second optical device 36, it can be arbitrarily swung within a large angle range to the desired angle, thereby achieving orientation adjustment of the second optical device 36.

[0066] The function of the first and second orientation adjustment devices is to enable the second optical device 36 to accurately guide the light beam emitted by the first optical device 35 to the wearer's eyes. Since different wearers may have different face shapes and eye socket depths, adjusting the position / light emission direction of the first orientation adjustment device 37 or the tilt angle of the second orientation adjustment device can ensure that the light beam is guided to the eyes of different wearers. Of course, the first and second orientation adjustment devices can be adjusted simultaneously.

[0067] As can be seen from the above, the main function of the second optical device 36 is to reflect the light beam, and its structure can be one of the following two types:

[0068] The first type, as shown in Figure 14A, includes a second optical device 36 comprising a reflective plane 361, with a convex surface 362 protruding from the light-incident side of the reflective plane 361. The light beam passes through the convex surface 362 and is incident on the reflective plane 361, then reflected by the reflective plane 361 and passes through the convex surface 362 again to the wearer's eye. The normal of the reflective plane 361 has an angle of inclination relative to the optical axis of the incident light beam.

[0069] The first optical device 35 emits light to the second optical device 36, which then projects the light in a direction and at a distance easily visible to the wearer. To project the light at this distance, the second optical device 36 must have positive refractive power. The aforementioned convex surface 362 possesses positive refractive power, just like the convex surface of a typical convex lens. It can be seen that the light beam essentially passes through the convex surface 362 twice during the entire process: first entering through it, and then exiting it, as shown in Figure 14B. Therefore, the light beam is affected twice by the positive refractive power of the convex surface 362, which ensures the beam is projected at a distance easily visible to the wearer. Furthermore, the reflective plane 361 is tilted relative to the optical axis of the incident light, further contributing to projecting the beam in a direction easily visible to the user.

[0070] The second type, as shown in Figure 15, includes a concave reflective surface 363, which reflects the light beam to the wearer's eye. The normal of the concave reflective surface 363 has an angle of inclination relative to the optical axis of the incident light beam.

[0071] The first optical device 35 can be an optomechanical system, as shown in Figures 4 and 16. The optomechanical system may include an image display element 351 and a transmission window 352. The image display element 351 emits a light beam carrying image information. This light beam exits from the light transmission window 352 and propagates in the direction of the second optical device 36. The type of image display element 351 is not limited; for example, it can be Micro-LED (Micro Light-Emitting Diode), Micro-OLED (Micro Organic Light-Emitting Diode), LCoS (Liquid Crystal on Silicon), LCD (Liquid Crystal Display), DMD (Digital Micromirror Device), DLP (Digital Light Processing), or LBS (Laser Beam Scanning), etc. The light transmission window 352 blocks any light rays that do not propagate in the direction of the second optical device 36, thereby preventing image light from leaking to the outside.

[0072] The "image information" carried in the beam can be an image or video pre-stored in the smart glasses, or it can be an image or video received from an external device. For example, when the wearer's mobile phone receives an image or video, the mobile phone sends the image or video to the smart glasses through a Bluetooth channel established with the smart glasses. The smart glasses then project the image or video through the first optical device 35 for the wearer to view, so the wearer does not need to specifically check the mobile phone.

[0073] As a preferred embodiment, the center of the light transmission window 352 is positioned below the upper surface of the temple 33 to reduce the risk of light escaping from the transmission window 352 and being blocked by the upper eyelid as it moves toward the second optical device 36.

[0074] Furthermore, as shown in FIG17, the first optical device 35 further includes a prism 353 and a first optical component 354 located between the image display element 351 and the light transmission window 352. The first optical component 354 has positive diopter and can be a single convex lens or a combination of multiple lenses. The light beam emitted from the image display element 351 undergoes at least one reflection in the prism 353 before reaching the first optical component 354, and then passes through the first optical component 354 to reach the light transmission window 352.

[0075] Furthermore, as shown in Figure 18, a negative diopter lens 355 can also be provided between the image display element 351 and the prism 353. It should be noted that although the negative diopter prism 355 is shown as a plano-concave lens in Figure 9, where the concave surface of the negative diopter lens 355 faces the image display element 351 and the planar surface faces the prism 353, other types of prisms can be used in specific implementations, as long as the diopter is negative.

[0076] It should also be noted that the size of the prism 353 in Figures 17 and 18 can be flexibly designed. As shown in Figure 19A, the prism 353 has only one reflecting surface. The light beam emitted by the image display element 351 is reflected once in the prism 353 before reaching the first optical component 354. This design requires a longer size L1 for the first optical device 35. Correspondingly, as shown in Figure 19B, the prism 353 has two reflecting surfaces. The light beam emitted by the image display element 351 is reflected twice in the prism 353 before reaching the first optical component 354. This design requires a shorter size L2 for the first optical device 35. Therefore, when the size of the first optical device 35 needs to be very small, it can be achieved by increasing the number of reflecting surfaces in the prism 353.

[0077] The design principles of the smart glasses provided in this application, as well as the advantages of such a design, are detailed below. Referring to Figure 20, the inner side of the frame is first divided into four regions: U (upper frame), L (lower frame), T (temple side), and N (nose pad side), and the advantages and challenges of each region are summarized. Furthermore, for the sake of simplicity, Figure 20 assumes that the optical engine is placed on the right side of the right frame and the image is displayed in the wearer's right eye. Those skilled in the art will understand that even if the left and right sides are reversed, with the optical engine on the left side of the left frame and the image displayed in the wearer's left eye, this description remains valid, and the principle is the same.

[0078] For region U: This region has the same problem as the third near-eye display technology described in the background art.

[0079] For area L: The second optics obstructs the most important external field of vision in daily life. When the wearer is performing detailed tasks at close range, they usually look down and use their eyes to perceive height to complete the work. However, if the second optics is placed in area L, it will obstruct the downward field of vision of the right eye, thus obstructing binocular vision, making manual operations more difficult, and causing great inconvenience to the wearer.

[0080] Furthermore, typical eyeglass frame designs tend to have a thinner lower frame for aesthetic purposes. However, this design prevents the frame from adequately concealing the second optical element.

[0081] For region T: As shown in Figure 20, the design of standard eyeglasses positions the wearer's pupil near the nose, at the center of the frame. With this design, placing the second optics in region T results in a viewing angle exceeding 40 degrees (as shown in Figure 21). Once the viewing angle exceeds 40 degrees, maintaining that angle of gaze becomes extremely difficult for the user.

[0082] For region N: As shown in Figure 20, the design of standard eyeglasses positions the wearer's pupil near the nose, centered in the frame. Therefore, even following this design, placing the second optics in region N will keep the viewing angle within 40 degrees, thus presenting the image in an easily viewable position. Furthermore, although the user needs to look to the side to see the image, this will not appear strange to a third party, as looking to the side is a frequent and familiar action in daily life.

[0083] In this arrangement, the second optical device may obstruct the left edge of the right eye's visual field, but the negative impact is very small. Figures 22A and 22B show the visual obstruction comparison when the second optical device is located in regions T and N, respectively. Because people use both eyes in daily life, the left visual field is processed only by the left eye, as shown in Figure 23. Therefore, even if the second optical device obstructs the left edge of the right eye's visual field, it will not reduce the overall binocular visual field and will hardly interfere with daily activities.

[0084] Furthermore, if the second optical device is placed in area N, it can not only be hidden by the frame, but also by the bridge of the nose, thus allowing for the placement of a larger second optical device without attracting attention.

[0085] Conclusion: It is evident that the second optical device, serving as the eyepiece optics, cannot simply be placed arbitrarily on the back of the frame. As this application indicates, the most ideal placement is in region N—that is, near the nose pad and located on the side of the frame closest to the face.

[0086] As described above, the key design feature of this application is that the smart glasses include a "first optical device" located on the side of the frame closest to the face and adjacent to the temple, and a "second optical device (eyepiece optical device)" located on the side of the frame closest to the face and adjacent to the nose pad. The second optical device 36 does not integrate a display element. This allows for a reduction in the size of the second optical device and eliminates the need for wiring inside the frame, thereby enabling a higher level of aesthetic design.

[0087] The positions of the first optical device 35 and the second optical device 36 are shown in Figure 24. As a preferred design, they should meet the following angle and length requirements:

[0088] GA (Gaze Angle): ≤40 degrees. If it exceeds 40 degrees, the burden of maintaining vision will be very high.

[0089] MH (horizontal distance): ≤15 mm. If it exceeds 15 mm, the second optical device will appear prominent to a third party.

[0090] MV (vertical distance): ≤12 mm, the optical axis TM is close to the face, and the light from the first optical device 35 to the second optical device 36 is more easily interfered with by the upper eyelid.

[0091] TV (vertical distance): ≤20 mm, optical axis TM is close to the face, and the light from the first optical device 35 to the second optical device 36 is easily interfered with by the upper eyelid.

[0092] Figure 25 also shows some specific values ​​as examples.

[0093] In addition, Figure 26 shows the appearance of Figure 25 when viewed from the front by a third party. It can be confirmed from Figure 26 that the optical equipment is partially obscured by the frame and bridge of the nose and is not conspicuous from the perspective of a third party.

[0094] Based on the structure of the smart glasses described above, as shown in Figure 27, the smart glasses incorporate a processor 270, a sensor 271, a memory 272, and a battery 273. The sensor 271 is used to track and capture images of the wearer's eyes in real time. For example, it can be implemented using a CCD sensor, a CMOS sensor, or an infrared sensor. The sensor 271 can be placed near the inner side of the temple 33 and close to the first optical device 35, or near the nose pad and close to the second optical device 36, or it can be located on the inner side of the upper frame, with the inner side of the upper frame being the preferred location. The processor 270, memory 272, and battery 273 can be built into the frame 31 or the temple 33.

[0095] Battery 273 connects to processor 270, sensor 271, and first optical device 35, and is used to power processor 270, sensor 271, and first optical device 35. Additionally, smart glasses may also include a 9-axis sensor 274 connected to processor 270, speaker 275, microphone 276, short-range communication module 277, etc.

[0096] A 9-axis sensor is used to detect the wearer's posture or movement.

[0097] Speaker 275 is used to output audio signals.

[0098] Microphone 276 is used to pick up the user's voice signal.

[0099] The short-range communication module 277 can be a Bluetooth module, or a combination of a Bluetooth module and a WiFi module, used to relay wireless signals. Signal relay refers to transmitting data from the smart glasses wirelessly to an external smart device (such as a smartphone) for algorithm processing and analysis via Bluetooth / WiFi. Of course, if the smart glasses themselves do not need to perform complex data processing functions, the processor 270 can also reuse the wireless communication module 277. In this case, the wireless communication module 277 also serves as the main control device of the smart glasses, such as controlling the wireless communication protocol, microphone input, speaker output, etc.

[0100] The memory 272 stores program instructions that can be executed by the processor. The program instructions are used to analyze the wearer's eye image sensed by the sensor 271. When the analysis shows that the wearer's eye state meets the preset light emission triggering conditions, the first optical device 35 is controlled to emit the light beam.

[0101] Specifically, as an optional solution, sensor 271 may include an infrared LED and a camera. The infrared LED emits infrared light towards the wearer's eyes; the camera tracks and captures the wearer's eye movement trajectory. The infrared light forms a flash on the eyeball, and the camera continuously tracks and captures the position of this flash, thereby determining the direction of eye movement. The program instructions control the first optical device 35 to emit the light beam when it is determined that the wearer's eyes are looking at the second optical device 36. In this solution, the smart glasses have an eye-tracking function, controlling the first optical device 35 to emit a light beam only when the wearer's eyes are looking at the second optical device 36. When the wearer is not looking at the second optical device 36, the first optical device 35 does not emit a light beam, thus reducing the power consumption of the first optical device 35.

[0102] Specifically, as an alternative, sensor 271 can capture real-time images of the wearer's eyes. The program instructions are used to control the first optical device 35 to emit the light beam when the wearer's eye state is analyzed to meet a preset fatigue state. This solution can be used to analyze and determine whether the wearer is in a scenario of fatigued driving or dozing off while studying / working. For example, the wearer's fatigue or dozing off can be determined by analyzing the proportion of the wearer's eye closure frequency. When the eyeballs cannot be identified in the eye image, it means the eyes are closed, while when the eyeballs can be identified in the eye image, it means the eyes are open. By analyzing multiple consecutive frames of images, the wearer's eye closure frequency can be obtained. When the closure frequency exceeds a preset frequency threshold, it indicates that the wearer's eyes are closed more often, indicating a fatigued or dozing off state. For example, a pre-trained eye state detection model is stored in memory 272. The above program instructions are also used to input the captured eye images into the eye state detection model. After the eye state detection model is trained and analyzed, the current state of the wearer is obtained. If it is determined that the wearer's current state is fatigued, the first optical device 35 is controlled to emit the light beam.

[0103] Furthermore, the aforementioned eye state detection model can classify the wearer's current state into different fatigue levels based on the detected fatigue level. For different fatigue levels, the first optical device can be controlled to emit a light beam in different ways. For example, when the wearer is mildly fatigued, the first optical device 35 can be controlled to emit a light beam of normal brightness; when the wearer is moderately fatigued, the first optical device 35 can be controlled to emit a very bright light beam; and when the wearer is severely fatigued, the first optical device 35 can be controlled to emit a light beam that flickers rapidly and changes brightness.

[0104] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A smart glasses with a display function, characterized in that, The frame includes a lens, lenses, and temples, with a nose pad on the edge of the frame; it also includes: A first optical device is disposed on the inner side of the smart glasses for emitting a light beam carrying image information. The second optical device is located on the nose pad or on the frame where the nose pad is located, and is directly opposite the light-emitting surface of the first optical device, for guiding the light beam toward the wearer's eyes.

2. The smart glasses as described in claim 1, characterized in that, The two sides of the frame bend towards the temples to form posts, and the temples are connected to the posts; The inner surface refers to the inner surface of the pile head.

3. The smart glasses as described in claim 1, characterized in that, The inner side is the inner side of the temple near the frame.

4. The smart glasses as described in any one of claims 1 to 3, characterized in that, The smart glasses also include a first orientation adjustment device; The first orientation adjustment device is disposed on the temple and connected to the first optical device, and is used to adjust the position of the first optical device on the temple and / or the light emission direction.

5. The smart glasses as described in claim 1, characterized in that, The second optical device is located on the frame where the nose pad is located, and the position of the second optical device is below the nose pad.

6. The smart glasses as described in claim 1, characterized in that, The second optical device is integrally formed on the surface of the nose pad or on the surface of the frame where the nose pad is located, and the surface faces the light emission direction of the first optical device.

7. The smart glasses as described in claim 1, characterized in that, The second optical device is detachably mounted on the surface of the nose pad or on the surface of the frame where the nose pad is located, the surface being oriented toward the light emission direction of the first optical device.

8. The smart glasses as described in claim 1, characterized in that, The second optical device is fixedly disposed on the surface of the nose pad or on the surface of the frame where the nose pad is located, and the surface faces the light emission direction of the first optical device.

9. The smart glasses as described in any one of claims 6-8, characterized in that, The smart glasses also include a second orientation adjustment device; The second orientation adjustment device is disposed on the frame and connected to the second optical device or the nose pad on which the second optical device is mounted, for adjusting the tilt angle of the second optical device so that the angle between the second optical device and the wearer's eyes changes relative to the first optical device.

10. The smart glasses as described in claim 1, characterized in that, The second optical device includes a reflective plane with a convex surface protruding from the light-incident side of the reflective plane; the light beam is incident on the reflective plane through the convex surface, and then reflected by the reflective plane before passing through the convex surface again to the wearer's eye; the normal of the reflective plane has an angle of inclination relative to the optical axis of the incident light beam.

11. The smart glasses as described in claim 1, characterized in that, The second optical device includes a concave reflective surface, which reflects the light beam to the wearer's eye, and the normal of the concave reflective surface has an angle relative to the optical axis of the incident light beam.

12. The smart glasses as described in claim 1, characterized in that, The first optical device includes an image display element and a light transmission window; The image display element is used to emit a light beam carrying image information, and the light beam is transmitted in the direction of the second optical device after exiting the light transmission window.

13. The smart glasses as described in claim 12, characterized in that, The center of the light transmission window is lower than the upper surface of the temple.

14. The smart glasses as described in claim 12, characterized in that, The first optical device further includes: a prism and a first optical component located between the image display element and the light transmission window; the first optical component has positive diopter. The light beam emitted by the image display element is reflected at least once in the prism before reaching the first optical component, and then passes through the first optical component to the light transmission window.

15. The smart glasses as described in claim 14, characterized in that, A negative diopter lens is provided between the image display element and the prism.

16. The smart glasses as described in claim 15, characterized in that, The light beam emitted by the image display element is reflected more than twice in the prism before reaching the first optical component.

17. The smart glasses as described in claim 1, characterized in that, The smart glasses have sensors installed on their inner side, and the frame or temples have built-in batteries, memory, and processors. The battery is connected to the sensor, the processor, and the first optical device, and is used to power the sensor, the processor, and the first optical device; The sensor is used to track and sense images of the wearer's eyeballs; The memory stores program instructions that can be executed by the processor. The program instructions are used to analyze the wearer's eye images sensed by the sensor. When the analysis shows that the wearer's eye state meets the preset light emission triggering conditions, the processor controls the first optical device to emit the light beam.

18. The smart glasses as described in claim 17, characterized in that, When the analysis determines that the wearer's eye condition meets the preset light emission triggering conditions, the first optical device is controlled to emit the light beam, including: When it is determined that the wearer's eyes are looking at the second optical device, the first optical device is controlled to emit the light beam.

19. The smart glasses as described in claim 17, characterized in that, When the analysis determines that the wearer's eye condition meets the preset light emission triggering conditions, the first optical device is controlled to emit the light beam, including: When the wearer's eye condition is determined to be in a preset fatigue state, the first optical device is controlled to emit the light beam.

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