Shooting prompting assembly and intelligent glasses

Abstract

An embodiment of the invention discloses a shooting prompt assembly and intelligent glasses, an indicating lamp and a photosensitive element are isolated by setting a retaining wall, a first light guide part penetrates through the retaining wall, first non-polarized light emitted by the indicating lamp forms first S polarized light after passing through the first light guide part, and the first S polarized light is emitted to a first polarization beam splitting structure; the first S polarized light is reflected to the phase delay structure by the first polarization beam-splitting structure and is emitted out of the window after passing through the phase delay structure to form indication light, reflected light formed by reflection enters through the phase delay structure to form first P polarized light, and the first P polarized light enters the photosensitive element after transmitting the first polarization beam-splitting structure. Therefore, the shooting prompt indicating light emitting area and the shielding detection incident light sensing area can share the same area, the situation that shielding detection of the indicating light fails when only the indicating light emitting area is shielded is avoided, the integration degree of the shooting prompt assembly is higher, and the overall size can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of smart wearable devices, and more particularly to a shooting prompt component and smart glasses. Background Art

[0002] With the development of science and technology, more and more wearable smart devices have entered people's daily lives. Smart glasses are a common wearable device. By integrating electronic devices into glasses, smart glasses can have functions such as image display, audio playback, and signal acquisition. When users of smart glasses use smart glasses to take photos or videos in public places or private spaces, they may record images or videos of others without their knowledge, thereby infringing on the privacy rights of others. Although some current smart glasses are equipped with a shooting status indicator light to provide shooting prompts, the indicator light emitting area of ​​the shooting status indicator light of the existing smart glasses is spatially separated from the light input area of ​​the light detector. In this way, when only the indicator light emitting area is blocked, the response value of the light detector will not change, making the occlusion detection of the shooting status indicator light invalid. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a shooting prompt component and smart glasses, which are conducive to improving at least some of the above-mentioned problems existing in the prior art.

[0004] In the first aspect, an embodiment of the present invention provides a shooting prompt component, including a window, a blocking wall, an indicator light, a photosensitive element and a light guide module; the blocking wall is arranged on one side of the window and defines a first mounting cavity and a second mounting cavity of the shooting prompt component, the blocking wall has a through hole that passes through the first mounting cavity and the second mounting cavity along a first direction; the indicator light is configured to emit a first non-polarized light when the shooting component is turned on, and the indicator light is arranged in the first mounting cavity; the photosensitive element is arranged in the second mounting cavity and is configured to detect light and generate a light detection signal; the light guide module includes a first light guide part and a second light guide part, the first light guide part passes through the through hole from the first mounting cavity and extends to the second mounting cavity, the second light guide part is arranged in the second mounting cavity and between the photosensitive element and the window, and the second light guide part has a first end and a second end opposite to each other along the second direction. end, the second direction intersects with the first direction, the first end is opposite to the first light guiding part, the second end is close to the window, the first end has a first polarization splitting structure, and the second end has a phase delay structure; the first non-polarized light forms a first S polarized light after passing through the first light guiding part and is emitted toward the first polarization splitting structure, the first S polarized light is reflected by the first polarization splitting structure along the second direction to the phase delay structure, and is emitted out of the window to form an indicator light after passing through the phase delay structure; the phase delay structure is further configured to receive reflected light incident from outside the window, the reflected light is formed by the indicator light reflected by an external object of the shooting prompt component, the reflected light forms a first P polarized light through the phase delay structure, and the first P polarized light is emitted into the photosensitive element after transmitting the first polarization splitting structure.

[0005] Furthermore, the first light-guiding portion includes a polarizing structure and a reflecting structure. The polarizing structure is arranged in the first mounting cavity and is arranged opposite to the indicator light. The first non-polarized light emitted by the indicator light is separated into the first S-polarized light by the polarizing structure and emitted to the reflecting structure. The reflecting structure reflects the first S-polarized light passing through the polarizing structure through the through hole to the second light-guiding portion.

[0006] Furthermore, the reflective structure includes a high reflective film or a polarization splitting film.

[0007] Furthermore, the polarization structure includes a polarizer or a polarization beam splitter prism.

[0008] Furthermore, the first light guiding part also includes a first light guiding column, which passes through the through hole. The first light guiding column is located at one end of the first mounting cavity and has a first surface and a second surface. The first surface and the second surface are arranged at an angle. The polarizing structure is arranged on the first surface, and the reflecting structure is arranged on the second surface. The first light guiding column is located at one end of the second mounting cavity and is arranged opposite to the first polarization splitting structure.

[0009] Furthermore, the phase delay structure includes a quarter wave plate, the angle between the optical axis of the quarter wave plate and the polarization direction of the first S polarized light is 45°, and the indicator light formed after the first S polarized light passes through the quarter wave plate is circularly polarized light.

[0010] Furthermore, the retaining wall also defines a third installation cavity, and the third installation cavity and the first installation cavity and the second installation cavity. The light guide module also includes a detection polarizer, and the detection polarizer is arranged on the side of the photosensitive element opposite to the window and is located between the photosensitive element and the first polarization splitting structure; the first P polarized light transmits through the first polarization splitting structure and then transmits through the detection polarizer to the photosensitive element.

[0011] Furthermore, the retaining wall also defines a third installation cavity, which is separated from the first installation cavity and the second installation cavity; the shooting prompt component also includes an infrared lamp, which is arranged in the third installation cavity and is configured to emit infrared light outside the window, and the photosensitive element is configured to detect the infrared light reflected by the external object.

[0012] In a second aspect, an embodiment of the present invention further provides a pair of smart glasses, comprising a glasses body, a shooting component, a shooting prompt component as described in the first aspect, and a control circuit; the shooting component and the shooting prompt component are arranged on the glasses body; the control circuit is electrically connected to the shooting component and the shooting prompt component, and the control circuit is configured to: when the shooting component is started, control the indicator light to enter a shooting prompt state, wherein the indicator light emits the first non-polarized light when entering the shooting prompt state; determine the blocking state of the window according to the light detection signal, the blocking state of the window including a blocked state and an unblocked state; and control the working state of the shooting component according to the blocking state of the window.

[0013] Furthermore, the control circuit is further configured to: when the indicator light is in the off state, determine a reference light intensity value according to the light detection signal; controlling the indicator light to enter the shooting prompt state includes: controlling the indicator light to emit the first non-polarized light in the first time period; and controlling the indicator light to be off in the second time period; determining the occlusion state of the window according to the light detection signal includes: determining the occlusion state of the window according to the opening light intensity value and the reference light intensity value, the opening light intensity value being the light intensity value of the light detection signal corresponding to the first time period; determining the occlusion state of the window according to the closing light intensity value and the reference light intensity value, The closing light intensity value is the light intensity value of the light detection signal corresponding to the second time period; wherein, determining the blocking state of the window based on the closing light intensity value and the reference light intensity value includes: when the difference between the reference light intensity value and the closing light intensity value is less than a first threshold value and greater than a second threshold value, determining that the blocking state of the window is the unblocked state; when the closing light intensity value is zero, determining that the blocking state of the window is the blocked state; and when the difference between the reference light intensity value and the closing light intensity value is greater than a third threshold value, determining that the blocking state of the window is the unblocked state, wherein the third threshold value is greater than the first threshold value.

[0014] Furthermore, the duration of the second time period is less than 0.1 seconds; determining the blocking state of the window based on the turn-on light intensity value and the reference light intensity value includes: when the difference between the turn-on light intensity value and the reference light intensity value is greater than a fourth threshold, determining that the blocking state of the window is a blocked state; wherein, when the difference between the turn-on light intensity value and the reference light intensity value is less than or equal to the fourth threshold, controlling the indicator light to be turned off during the second time period.

[0015] Furthermore, controlling the working state of the shooting component according to the blocking state of the window includes: when the blocking state of the window is the blocked state, controlling the shooting component to be powered off; the control circuit is also configured to: when the shooting component is powered off, control the indicator light to exit the shooting prompt state.

[0016] Furthermore, the smart glasses also include a display component, which is provided on the glasses body and electrically connected to the control circuit; the control circuit is also configured to: when the indicator light is off, determine the ambient light intensity status according to the light detection signal; when the display component is in the display state, adjust the display brightness of the display component according to the ambient light intensity status; and when the indicator light is in the shooting prompt state, stop adjusting the display brightness of the display component.

[0017] The present invention provides a shooting prompt assembly and smart glasses. By setting a retaining wall to separate the indicator light and the photosensitive element, a first light guide portion penetrates the retaining wall. The first non-polarized light emitted by the indicator light passes through the first light guide portion to form first S-polarized light and is emitted to the first polarization splitting structure. The first S-polarized light is reflected by the first polarization splitting structure to the phase delay structure, and after passing through the phase delay structure, it is emitted out of the window to form indicator light. The reflected light is incident through the phase delay structure to form first P-polarized light. The first P-polarized light is transmitted through the first polarization splitting structure and then enters the photosensitive element. In this way, the emission area of ​​the indicator light for the shooting prompt and the light input sensing area for occlusion detection can share the same area, avoiding the situation where the occlusion detection of the indicator light fails when only the emission area of ​​the indicator light is blocked. In addition, the shooting prompt assembly has a higher degree of integration, which is conducive to reducing the overall volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic structural diagram of smart glasses according to an embodiment of the present invention;

[0020] Figure 2 is a schematic block diagram of the structure of smart glasses according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of a shooting prompt component according to an embodiment of the present invention;

[0022] Figure 4 is a schematic block diagram of the structure of smart glasses according to another embodiment of the present invention;

[0023] Figure 5 This is the internal structure of a shooting prompt component according to another embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 10-glasses body; 11-frame; 12-tip; 20-shooting assembly; 30-shooting prompt assembly; 31-window; 32-blocking wall; 321-through hole; 322-first mounting cavity; 323-second mounting cavity; 324-third mounting cavity; 33-indicator light; 34-photosensitive element; 35-first light guide part; 351-polarizing structure; 352-reflecting structure; 353-first light guide column; 36-second light guide part; 361-first polarization splitting structure; 362-phase delay structure; 363-second light guide column; 37-detection polarizer; 38-infrared lamp; 40-control circuit; 50-display assembly. DETAILED DESCRIPTION

[0026] The present application is described below based on the following embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. To avoid obscuring the essence of the present application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0027] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0028] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0029] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0030] Where the solutions described in this specification and in the examples involve the processing of personal information, such processing will be conducted with a legitimate basis (e.g., with the consent of the personal information subject or as necessary for the performance of a contract) and only within the prescribed or agreed scope. A user's refusal to process personal information other than that required for basic functions will not affect the user's use of these basic functions.

[0031] The embodiment of the present invention relates to a pair of smart glasses and a shooting prompt component 30 that can be applied to the smart glasses. Figure 1 、 Figure 2 and Figure 4 In an embodiment of the present invention, smart glasses include a glasses body 10, a camera assembly 20 and a camera prompt assembly 30 mounted on the glasses body 10, and a control circuit 40. The camera assembly 20 is used to control image capture in a predetermined direction of the smart glasses. The control circuit 40 is electrically connected to the camera assembly 20 and the camera prompt assembly 30. The control circuit 40 can control the camera prompt assembly 30 to emit an indicator light when the camera assembly 20 is activated and enters the shooting state, thereby notifying nearby people that the smart glasses are using the shooting function, preventing unauthorized or other improper shooting of the subject, and enhancing the subject's privacy and security.

[0032] The control circuit 40 may include a processor and circuits connected between the processor and the shooting prompt component 30, the shooting component 20, and other components in the smart glasses. Optionally, a flexible printed circuit board (FPC) may be used to achieve electrical connections between the shooting prompt component 30 and the processor, and between the shooting component 20 and the processor. The control circuit 40 may be arranged in the temple 12, in the frame 11, or distributed in both the frame 11 and the temple 12. The control circuit 40 may include a processor and circuits connected between the processor and the shooting prompt component 30, the shooting component 20, and other components in the smart glasses. Optionally, a flexible printed circuit board (FPC) may be used to achieve electrical connections between the shooting prompt component 30 and the processor, and between the shooting component 20 and the processor. The control circuit 40 may be arranged in the temple 12, in the frame 11, or distributed in both the frame 11 and the temple 12.

[0033] Reference Figure 3 Optionally, a window 31 is provided on the surface of the glasses body 10. The shooting prompt assembly 30 includes a window 31, an indicator light 33 and a light guide module. After the control circuit 40 controls the indicator light 33 to emit light, the light of the indicator light 33 is guided to the window 31 through the light guide module to emit an indicator light. The light emitted by the indicator light 33 is visible light for human observation. The indicator light 33 can be a light emitting diode (LED) or other visible light source. Preferably, the direction in which the indicator light is emitted through the window 31 and the shooting direction of the shooting assembly 20 are in the same direction, for example, they are provided on the same side of the glasses body 10, to ensure that during the shooting process of the shooting assembly 20, the person being photographed can clearly see the indicator light and know that they are being photographed.

[0034] The glasses body 10 may include a frame 11 and temples 12. The temples 12 are provided at both ends of the frame 11. The front end of each temple 12 is connected to the frame 11, and the rear end extends backward. A lens may be provided in the frame 11. According to the needs of the actual application scenario, the shooting component 20 and the shooting prompt component 30 may be installed on the frame 11 or the temples 12. In one embodiment, the shooting component 20 and the shooting prompt component 30 may both be installed on the frame 11. The frame 11 has an installation space, which is connected to the surface of the frame 11 through a mounting hole provided on the frame 11. The shooting prompt component 30 is provided in the installation space, and the window 31 is provided on the surface of the frame 11 and at least partially covers the mounting hole. Preferably, the window 31 is sealed with the mounting hole to achieve waterproof and dustproof properties of the smart glasses.

[0035] In this embodiment, the shooting prompt component 30 also includes a photosensitive element 34 for detecting light and generating a light detection signal. The ambient light outside the shooting prompt component 30 is irradiated to the photosensitive element 34 through the window 31 and the second light guide 36. The light detection signal of the photosensitive element 34 can reflect the intensity of the ambient light. The control circuit 40 of the smart glasses can determine the intensity of the ambient light based on the light detection signal, and control the smart glasses accordingly according to the determined intensity of the ambient light. Optionally, the smart glasses can also include a display component 50 for displaying images. The display component 50 can be set on the frame 11 and electrically connected to the control circuit 40. When the indicator light 33 is not illuminated, the control circuit 40 determines the ambient light intensity state based on the light detection signal. When the display component 50 is in the display state, the control circuit 40 adjusts the display brightness of the display component 50 according to the determined ambient light intensity state. When the ambient light intensity increases, the display brightness of the display assembly 50 is controlled to increase; when the ambient light intensity decreases, the display brightness of the display assembly 50 is controlled to decrease. This allows the display brightness of the display assembly 50 to be intelligently adjusted according to changes in ambient light, improving the visual experience of the user viewing the image. In some embodiments, the display assembly 50 may include a microdisplay, an illumination system, a waveguide, and other structures. The display brightness can be adjusted by adjusting the waveguide, adjusting the current of the illumination system, or other feasible methods, which are not limited in this embodiment of the present invention.

[0036] In an embodiment of the present invention, the shooting prompt assembly 30 further includes a retaining wall 32, which is disposed on one side of the viewing window 31 and defines the space within the shooting prompt assembly 30 into a first mounting cavity 322 and a second mounting cavity 323. The retaining wall 32 separates the first mounting cavity 322 and the second mounting cavity 323. The retaining wall 32 is made of a non-transparent material. The indicator light 33 is disposed in the first mounting cavity 322, and the photosensitive element 34 is disposed in the second mounting cavity 323. The provision of the retaining wall 32 prevents light emitted by the indicator light 33 from directly impinging on the photosensitive element 34 and interfering with the light detection signal. The retaining wall 32 also includes a through hole 321 extending along a first direction through the first and second mounting cavities 322, 323. The light guide module includes a first light guide portion 35 and a second light guide portion 36. The first light guide portion 35 extends from the first mounting cavity 322 through the through hole 321 and into the second mounting cavity 323. The second light guide portion 36 is disposed in the second mounting cavity 323 and between the photosensitive element 34 and the viewing window 31.

[0037] When the camera assembly 20 is turned on, the indicator light 33 emits a first non-polarized light. The first non-polarized light passes through the first light guide portion 35 and passes through the through hole 321 along the first direction to form a first S-polarized light and is emitted to the second light guide portion 36. The second light guide portion 36 has a first end and a second end opposite to each other along the second direction, wherein the first direction and the second direction intersect, for example, referring to Figure 3 and Figure 5The first direction can be a horizontal direction from right to left, and the second direction can be a direction from bottom to top. The first end is opposite the first light guide portion 35, and the second end is close to the window 31. The first end has a first polarization splitting structure 361, and the second end has a phase delay structure 362. The first S-polarized light formed by the first unpolarized light passing through the first light guide portion 35 is emitted to the first polarization splitting structure 361. In some embodiments, the first polarization splitting structure 361 may include a polarizing beam splitter (PBS), such as a dielectric film PBS, a prism PBS, or other types of PBS. The polarization splitting film utilizes the interference effect of a multi-layer dielectric film or the characteristics of a birefringent crystal to reflect S-polarized light with a polarization direction perpendicular to the incident plane, while transmitting P-polarized light with a polarization direction parallel to the incident plane. The first S-polarized light is reflected by the first polarization splitting structure 361 along the second direction to the phase delay structure 362, and after passing through the phase delay structure 362, it is emitted out of the window 31 to form an indicator light for external observation. The polarization state of the first S-polarized light is adjusted when passing through the phase delay structure 362. If an external object (such as a user's finger) blocks the view window 31, after the indicator light exits the view window 31, at least a portion of the indicator light will be reflected by the external object, forming reflected light. The polarization state of this reflected light is substantially the same as that of the indicator light. The reflected light then passes through the view window 31 again from the outside, enters the shooting prompt assembly 30, and passes through the phase delay structure 362 to form the first P-polarized light. The first P-polarized light then transmits through the first polarization splitting structure 361 and enters the photosensitive element 34. When the view window 31 is not blocked, the amount of reflected light that is not reflected after exiting the view window or that is reflected and reenters the view window 31 is relatively small. Since the first S-polarized light formed by the first non-polarized light passing through the first light guide 35 is reflected along the second direction when it is directed toward the first polarization splitting structure 361, the light emitted by the indicator light 33 fails to pass through the first polarization splitting structure 361 and illuminates the photosensitive element 34. Moreover, since the blocking wall 32 prevents the first non-polarized light emitted by the indicator light 33 from directly illuminating the photosensitive element 34, the light illuminating the photosensitive element 34 includes two parts: the ambient light and the first P-polarized light formed by the reflected light. Furthermore, based on the light intensity indicated by the light detection signal generated by the photosensitive element 34, it can be determined whether an external object in front of the window 31 is blocking the indicator light. In this way, the photosensitive element 34 can not only be used for ambient light detection to adjust the display brightness of the smart glasses, but also for occlusion detection, thereby improving the structural compactness of the shooting prompt component 30 and the integration of the smart glasses.In addition, since the indicator light emitted and the reflected light incident on the photosensitive element 34 in the embodiment of the present invention need to pass through the same window 31, compared with setting the light path for the indicator light to be emitted and the light path for the reflected light to illuminate the photosensitive element 34 as two completely separated light paths, the technical solution of the embodiment of the present invention can effectively avoid the result that the detection value of the photosensitive element 34 cannot be changed when only the indicator light emission area is blocked, thereby making the occlusion detection of the indicator light 33 invalid.

[0038] The phase delay structure 362 can be configured in a variety of different ways, as long as the reflected light formed by the first S-polarized light after being emitted through the phase delay structure 362 is at least partially converted into the first P-polarized light after passing through the phase delay structure 362 again. In some embodiments, the phase delay structure 362 includes a quarter-wave plate (QWP), and the angle between the optical axis of the QWP and the polarization direction of the indicator light is 45°. The indicator light formed by the first S-polarized light passing through the QWP is circularly polarized light. The indicator light formed by the reflection of the indicator light from an external object is also circularly polarized light. The reflected light is at least partially converted into the first P-polarized light after passing through the QWP. In other embodiments, the phase delay structure 362 includes a half-wave plate (HWP). For example, the angle between the optical axis of the HWP and the y-axis can be made to be 22.5°. The first S-polarized light passes through the HWP and rotates 45° to become oblique linear polarized light (indicator light). The reflected light after being reflected by the external object passes through the HWP again, and the polarization direction is rotated by another 45°, and the cumulative rotation is 90° to become the first P-polarized light.

[0039] In some embodiments, the first light guiding portion 35 includes a polarizing structure 351 and a reflecting structure 352. The polarizing structure 351 is arranged in the first mounting cavity 322 and is arranged opposite to the indicator light 33. The first non-polarized light emitted by the indicator light 33 is separated into the first S-polarized light by the polarizing structure 351 and emitted to the reflecting structure 352. The reflecting structure 352 reflects the first S-polarized light passing through the polarizing structure 351 through the through hole 321 to the second light guiding portion 36.

[0040] Optionally, the first light guide portion 35 further includes a first light guide column 353, which is made of a transparent material and passes through the through hole 321. The first light guide column 353 is located at one end of the second mounting cavity and is arranged opposite the first polarization splitting structure 361. The first light guide column 353 utilizes the principle of total internal reflection (TIR) ​​to transmit the first S-polarized light from the first mounting cavity 322 to the first polarization splitting structure 361, thereby avoiding energy loss. In one embodiment, the first light guide column 353 is located at one end of the first mounting cavity and has a first surface and a second surface. The first surface and the second surface are arranged at an angle, and the first surface is opposite to the indicator light 33. The polarization structure 351 is provided on the first surface, and the reflection structure 352 is provided on the second surface. Optionally, the polarization structure 351 includes a polarizer or a polarization splitting prism, and the reflection structure 352 may include a highly reflective film or a polarization splitting film. The angle of the reflection structure 352 should be reasonably set to smoothly reflect the first S-polarized light passing through the polarization structure 351 through the through hole 321 and toward the first polarization splitting structure 361 at a predetermined angle. Optionally, a second light guide 363 may be included between the first polarization splitting structure 361 and the phase delay structure 362. The second light guide 363 may be made of the same or different transparent material as the first light guide 353. Furthermore, a third light guide may be provided between the phase delay structure 362 and the window 31. The first light guide 353, the second light guide 363, or the third light guide may be made of a high-transmittance material, such as PMMA, PC, or glass, with a higher refractive index than the surrounding material. The specific shape of the light guide controls the light propagation path and light output.

[0041] In some embodiments, the light guide module further includes a detection polarizer 37, which is disposed on the side of the photosensitive element 34 opposite the window 31 and between the photosensitive element 34 and the first polarization beam splitting structure 361. After passing through the first polarization beam splitting structure 361, the first P-polarized light passes through the detection polarizer 37 toward the photosensitive element 34. The detection polarizer 37 can be a linear polarizer that transmits only P-polarized light, such as a wire grid polarizer (WGP). This effectively prevents the first S-polarized light from entering the photosensitive element 34 and affecting the detection result, ensuring that the light intensity reflected by the light detection signal includes both ambient light and reflected light.

[0042] Reference Figure 4 and Figure 5In some embodiments, the retaining wall 32 further defines a third mounting cavity 324, which is spaced apart from the first mounting cavity 322 and the second mounting cavity 323. The shooting prompt assembly 30 also includes an infrared lamp 38, which is located in the third mounting cavity 324 and electrically connected to the control circuit 40 of the smart glasses, and is configured to emit infrared light out of the viewing window 31. The infrared light emitted by the infrared lamp 38 has an optical path separated from the first mounting cavity 322 and the second mounting cavity 323. The light shielding effect of the retaining wall 32 prevents the infrared light from irradiating the photosensitive element 34 before exiting the viewing window 31. The emission position of the infrared lamp 38 in the window 31 can be as close as possible to the emission position of the indicator light. When the shooting component 20 is in the turned-on state, the infrared lamp 38 can also emit infrared light. When there is an external obstruction in front of the window 31 that blocks the indicator light, the external obstruction is likely to be located in the emission path of the infrared light. At least a part of the infrared light is reflected into the second mounting cavity 323 and emitted to the photosensitive element 34. The photosensitive element 34 can also detect the infrared light to generate a light detection signal to judge the blocking state of the window 31.

[0043] In the smart glasses of the embodiments of the present invention, the control circuit 40 can activate the camera component 20 in response to a capture request. A capture request is a request to activate the camera component 20 to capture an image. Alternatively, the user can initiate a capture request by performing a predetermined operation on the smart glasses (e.g., clicking a button, voice command, gesture command, etc.). After receiving the capture request, the control circuit 40 controls the camera component 20 to activate and capture the image if other conditions for activating the capture function are met.

[0044] In one embodiment, when the camera assembly 20 is activated, the control circuit 40 may control the indicator light 33 to enter a shooting prompt state. When entering the shooting prompt state, the indicator light 33 emits a first unpolarized light to indicate the shooting status. Simultaneously, the photosensor 34 enters a proximity detection mode for detecting reflected light. When the indicator light 33 enters the shooting prompt state, the control circuit 40 may stop adjusting the display brightness of the display assembly 50 because the light detection signal may be affected by reflected light and may not accurately reflect the ambient light conditions. After the indicator light 33 enters the shooting prompt state and emits the first unpolarized light, the control circuit 40 determines the obstruction state of the window 31 based on the light detection signal. The obstruction state of the window 31 includes an obstructed state and an unobstructed state. The control circuit 40 controls the operating state of the camera assembly 20 based on the obstruction state of the window 31. For example, when the obstruction state of the window 31 is obstructed, indicating that the indicator light may be obstructed by the user or other obstacles and difficult for the subject to see, the control circuit 40 controls the camera assembly 20 to power off, preventing the user from photographing the subject without their knowledge. In addition, when it is determined that the occlusion state of window 31 is blocked, a prompt sound can be played through the speaker set on the smart glasses, or a prompt message can be displayed to the user through the display component 50 to remind the user that the window 31 needs to be unblocked before continuing to shoot.

[0045] In another embodiment, after receiving a capture request and before activating the capture assembly 20, the control circuit 40 may control the indicator light 33 to enter a capture prompt state, and then activate the capture function of the capture assembly 20 when the obstruction state of the window 31 is determined to be unobstructed based on the light detection signal. When the capture assembly 20 is dormant or powered off, the control circuit 40 may control the indicator light 33 to exit the capture prompt state and stop emitting the first unpolarized light.

[0046] In some embodiments, the control circuit 40 of the smart glasses can determine a reference light intensity value based on the light detection signal when the indicator light 33 is off. Furthermore, the reference light intensity value can be determined by the control circuit 40 based on the light detection signal within a predetermined time period (e.g., 3 seconds, 5 seconds, or 10 seconds) before the indicator light 33 enters the capture prompt state after receiving a capture request. The reference light intensity value can indicate the current ambient light conditions when the camera assembly 20 is activated. After the indicator light 33 enters the capture prompt state, the control circuit 40 controls the indicator light 33 to emit first unpolarized light during a first period of time. Then, based on the light detection signal from the photosensor 34, the turn-on light intensity value is determined. The turn-on light intensity value is the light intensity value of the light detection signal corresponding to the first period of time. The turn-on light intensity value is affected by both reflected light from obstructions in front of the window 31 and ambient light. When an external object obstructs the window 31, some ambient light is also blocked, reducing the amount of ambient light incident on the photosensor 34. In some scenarios, when the shooting prompt component 30 emits indicator light through the window 31, the amount of reflected light reflected by the obstruction and incident on the window 31 may be substantially equal to the amount of ambient light reduced. In this case, simply comparing the on-light intensity value with the reference light intensity value may not accurately determine the obstruction state of the window 31. In some embodiments, the control circuit 40 can control the on and off of the indicator light 33 according to a time sequence, and determine the obstruction state of the window 31 based on the light detection signal and the reference light intensity value in different time periods. After the indicator light 33 enters the shooting prompt state, the control circuit 40 controls the indicator light 33 to turn off in the second time period. That is, the control circuit 40 can control the on and off of the indicator light 33 according to a time sequence, so that the indicator light 33 emits the first unpolarized light in the first time period and turns off in the second time period. The duration of the second time period is a relatively short value. In this embodiment, the duration of the second time period can be less than 0.1 seconds. Following the timing sequence of the first and second time periods, the control circuit 40 determines the on-light intensity value corresponding to the first time period based on the light detection signal from the photosensor 34, and determines the off-light intensity value based on the light detection signal intensity value corresponding to the second time period. After the indicator light 33 is turned off, the light intensity value corresponding to the light detection signal is not affected by reflected light, but is primarily influenced by ambient light. If the window 31 is not obstructed by an external object, the off-light intensity value is substantially consistent with the reference light intensity value. However, if the window 31 is obstructed by an external object, the off-light intensity value is somewhat reduced relative to the reference light intensity value. Therefore, the control circuit 40 can determine the obstruction status of the window 31 based on the off-light intensity value and the reference light intensity value.Specifically, when the difference between the reference light intensity value and the off-light intensity value is less than a first threshold and greater than a second threshold, the obstruction state of window 31 can be determined to be unobstructed. The first and second thresholds can be values ​​at or near 0. That is, when the difference between the reference light intensity value and the off-light intensity value is very small, the obstruction state of window 31 can be determined to be unobstructed. When the off-light intensity value is zero, the surface window 31 may be completely obstructed, and no ambient light enters the photosensitive element 34. Therefore, the obstruction state of window 31 can be determined to be obstructed. When the difference between the reference light intensity value and the off-light intensity value is greater than a third threshold (where the third threshold is greater than the first threshold), that is, when the difference between the reference light intensity value and the off-light intensity value is large, it indicates that the window 31 may be obstructed, resulting in the obstruction of ambient light from entering the photosensitive element 34. In this case, the obstruction state of window 31 can be determined to be unobstructed.

[0047] In addition, the control circuit 40 can also determine the obstruction state of the window 31 based on the opening light intensity value and the reference light intensity value. For example, when the difference between the opening light intensity value and the reference light intensity value is greater than a fourth threshold value, the obstruction state of the window 31 can be determined to be an obstructed state. The fourth threshold value can be a relatively large value, that is, when the difference between the opening light intensity value and the reference light intensity value is large, it indicates that there may be an obstruction in front of the window 31 that blocks the indicator light and forms a reflected light with a relatively large light intensity. Therefore, the obstruction state of the window 31 can be determined to be an obstructed state. Among them, when the difference between the opening light intensity value and the reference light intensity value is less than or equal to the fourth threshold value, the indicator light 33 can be controlled to be turned off in the second time period, and the above-mentioned judgment process of controlling the indicator light 33 to light up and turn off according to the time sequence and determining the obstruction state of the window 31 according to the closing light intensity value and the reference light intensity value is performed.

[0048] The shooting prompt assembly 30 of the present invention separates the indicator light 33 from the photosensitive element 34 by providing a barrier wall 32. A first light guide 35 extends through the barrier wall 32. First unpolarized light emitted by the indicator light 33 passes through the first light guide 35, transforming into first S-polarized light and radiating toward the first polarization beam splitting structure 361. The first S-polarized light is reflected by the first polarization beam splitting structure 361 and then, after passing through the phase delay structure 362, is emitted out of the window 31 as indicator light. The reflected light is then incident on the phase delay structure 362, transforming into first P-polarized light. The first P-polarized light then transmits through the first polarization beam splitting structure 361 and enters the photosensitive element 34. This allows the exit area of ​​the indicator light for shooting prompts and the light input sensing area for occlusion detection to share the same area, avoiding the situation where occlusion detection of the indicator light fails when only the exit area of ​​the indicator light is blocked. Furthermore, the shooting prompt assembly 30 has a higher level of integration, which helps to reduce its overall size. In some embodiments, the control circuit 40 of the smart glasses further improves the robustness of occlusion detection by adding a timed control function to turn the indicator light 33 on and off, instantaneously turning off the indicator light 33, and determining the occlusion state of the window 31 based on the off light intensity value and the reference light intensity value.

[0049] The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A shooting prompt component, characterized in that: include: Windows; a retaining wall provided on one side of the window and defining a first installation cavity and a second installation cavity for the shooting prompt assembly, wherein the retaining wall has a through hole penetrating the first installation cavity and the second installation cavity along a first direction; an indicator light, configured to emit a first non-polarized light when the shooting component is turned on, the indicator light being disposed in the first mounting cavity; a light-sensitive element, disposed in the second mounting cavity and configured to detect light and generate a light detection signal; as well as The light guide module includes a first light guide portion and a second light guide portion, wherein the first light guide portion extends from the first mounting cavity through the through hole and to the second mounting cavity, the second light guide portion is disposed in the second mounting cavity and between the photosensitive element and the window, the second light guide portion having a first end and a second end opposite to each other along a second direction, the second direction intersecting the first direction, the first end opposite to the first light guide portion, the second end close to the window, the first end having a first polarization splitting structure, and the second end having a phase delay structure; The first unpolarized light is transformed into a first S-polarized light after passing through the first light-guiding portion and is emitted toward the first polarization splitting structure. The first S-polarized light is reflected by the first polarization splitting structure along the second direction toward the phase delay structure, and is emitted out of the window to form an indicator light after passing through the phase delay structure. The phase delay structure is also configured to receive reflected light incident from outside the window, where the reflected light is formed by an external object of the shooting prompt component reflecting the indication light. The reflected light passes through the phase delay structure to form a first P-polarized light, and the first P-polarized light is incident on the photosensitive element after transmitting through the first polarization splitting structure.

2. The shooting prompt component according to claim 1, characterized in that: The first light guide portion includes a polarizing structure and a reflecting structure. The polarizing structure is arranged in the first mounting cavity and opposite to the indicator light. The first non-polarized light emitted by the indicator light is separated into the first S-polarized light by the polarizing structure and emitted to the reflecting structure. The reflecting structure reflects the first S-polarized light passing through the polarizing structure through the through hole to the second light guide portion.

3. The shooting prompt component according to claim 2, characterized in that: The reflective structure includes a high reflective film or a polarization splitting film.

4. The shooting prompt component according to claim 2, characterized in that: The polarizing structure includes a polarizer or a polarizing beam splitter prism.

5. The shooting prompt component according to claim 2, characterized in that: The first light guide portion also includes a first light guide column, which passes through the through hole. The first light guide column is located at one end of the first mounting cavity and has a first surface and a second surface. The first surface and the second surface are arranged at an angle. The polarizing structure is arranged on the first surface, and the reflective structure is arranged on the second surface. The first light guide column is located at one end of the second mounting cavity and is arranged opposite to the first polarization splitting structure.

6. The shooting prompt component according to claim 1, characterized in that: The phase delay structure includes a quarter wave plate, the angle between the optical axis of the quarter wave plate and the polarization direction of the first S-polarized light is 45°, and the indicator light formed after the first S-polarized light passes through the quarter wave plate is circularly polarized light.

7. The shooting prompt component according to claim 1, characterized in that: The light guide module further includes a detection polarizer, which is arranged on a side of the photosensitive element opposite to the window and between the photosensitive element and the first polarization splitting structure; The first P-polarized light passes through the first polarization splitting structure and then passes through the detection polarizer to be emitted to the photosensitive element.

8. The shooting prompt component according to claim 1, characterized in that: The retaining wall further defines a third installation cavity, and the third installation cavity is spaced apart from the first installation cavity and the second installation cavity; The shooting prompt component further includes an infrared lamp, which is disposed in the third installation cavity and configured to emit infrared light out of the window, and the photosensitive element is configured to detect the infrared light reflected by the external object.

9. A pair of smart glasses, characterized in that: include: Glasses body; A shooting component is provided on the glasses body; The shooting prompt component according to any one of claims 1 to 8, provided on the glasses body; as well as A control circuit is electrically connected to the shooting component and the shooting prompt component, and the control circuit is configured to: When the shooting component is started, the indicator light is controlled to enter a shooting prompt state, wherein the indicator light emits the first non-polarized light when entering the shooting prompt state; determining an obstruction state of the window according to the light detection signal, wherein the obstruction state of the window includes an obstructed state and an unobstructed state; as well as The working state of the shooting component is controlled according to the blocking state of the window.

10. The smart glasses according to claim 9, wherein: The control circuit is further configured to: When the indicator light is in an off state, determining a reference light intensity value according to the light detection signal; The controlling the indicator light to enter the shooting prompt state includes: Controlling the indicator light to emit the first non-polarized light during a first time period; and Controlling the indicator light to turn off during the second period; Determining the occlusion state of the window according to the light detection signal includes: determining a blocking state of the window according to an opening light intensity value and the reference light intensity value, wherein the opening light intensity value is a light intensity value of the light detection signal corresponding to the first time period; determining the blocking state of the window according to a closing light intensity value and the reference light intensity value, wherein the closing light intensity value is a light intensity value of the light detection signal corresponding to the second time period; The determining of the blocking state of the window according to the closing light intensity value and the reference light intensity value includes: When the difference between the reference light intensity value and the closing light intensity value is less than a first threshold value and greater than a second threshold value, determining that the blocking state of the window is the unblocked state; When the closing light intensity value is zero, determining that the blocking state of the window is the blocked state; and When the difference between the reference light intensity value and the closing light intensity value is greater than a third threshold, the blocking state of the window is determined to be the unblocked state, wherein the third threshold is greater than the first threshold.

11. The smart glasses according to claim 10, wherein: The duration of the second period is less than 0.1 seconds; The determining the blocking state of the window according to the opening light intensity value and the reference light intensity value includes: When the difference between the opening light intensity value and the reference light intensity value is greater than a fourth threshold, determining that the blocking state of the window is a blocked state; When the difference between the turn-on light intensity value and the reference light intensity value is less than or equal to a fourth threshold, the indicator light is controlled to be turned off during the second time period.

12. The smart glasses according to claim 9, wherein: The controlling the working state of the shooting component according to the blocking state of the window includes: When the blocking state of the window is the blocked state, controlling the shooting component to cut off power; The control circuit is further configured to: When the shooting component is powered off, the indicator light is controlled to exit the shooting prompt state.

13. The smart glasses according to claim 9, wherein: The smart glasses further include: A display component, provided on the glasses body and electrically connected to the control circuit; The control circuit is further configured to: When the indicator light is off, determining the ambient light intensity state according to the light detection signal; and When the display component is in a display state, adjusting the display brightness of the display component according to the ambient light intensity state; When the indicator light is in the shooting prompt state, the display brightness of the display component is stopped from being adjusted.

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