Flash lamp module and electronic device

Abstract

The embodiments of the present application relate to the field of electronic devices. Provided are a flash lamp module and an electronic device, which are used to ameliorate the problems of limited adjustment range and large structural volume of flash lamps with a light-spot adjustment function. The flash lamp module comprises an illumination light source, a collimating apparatus and a variable-focus lens, wherein the illumination light source is configured to form an illumination beam projected to the collimating apparatus; the collimating apparatus is configured to receive the illumination beam, collimate the illumination beam, and then project same to the variable-focus lens; and the variable-focus lens is configured to project the illumination beam, and the focal length thereof is electronically adjustable. The flash lamp module can be applied to the electronic device.

Description

Flash module and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202410430504.0, filed on April 10, 2024, and entitled "Flash module and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, and in particular to a flash module and an electronic device. BACKGROUND

[0003] Electronic devices such as mobile phones, tablets, etc. are usually equipped with camera modules and flashlights. The electronic devices can realize photographing, video recording, scanning identification, etc. through the camera modules. The flashlight, as an auxiliary device for photographing, can provide light compensation for the camera module to improve the imaging quality of the camera module, especially in dark environments. In some cases, the flashlight can also be used as a flashlight for illumination only.

[0004] The traditional flashlight mainly includes a white light-emitting diode (LED) and a Fresnel lens located on the light-emitting side of the LED. The flashlight with the above structure can provide a wide range of illumination within the field of view (FOV) of the camera module, but the illumination range is fixed, which is difficult to meet the photographing requirements of different distances and different photographing ranges. For example, when performing long-distance photography, it is necessary to reduce the illumination spot generated by the flashlight to concentrate the light in a smaller photographing area; when performing close-range photography, it is necessary to expand the illumination spot generated by the flashlight to disperse the light in a larger photographing area. Based on this, some flashlights with adjustable spot size are provided in related technologies, but some of these flashlights have the limitation of limited spot size adjustment range; some have the problems of complex structure, large occupied volume, and difficulty in integration on portable electronic devices such as mobile phones. SUMMARY

[0005] The embodiments of the present application provide a flash module and an electronic device to improve the problems of limited adjustment range and large structure volume of the flash with spot size adjustment function.

[0006] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the embodiments of the present application provide a flash module, which comprises an illumination light source, a collimating device and a variable focus lens; wherein the illumination light source is configured to form an illumination light beam projected to the collimating device; the collimating device is configured to receive the illumination light beam and project the collimated illumination light beam to the variable focus lens; and the variable focus lens is configured to project the illumination light beam and the focal length of the variable focus lens is electrically controllable.

[0008] By using the flash module with the above structure, the illumination light spot of different sizes can be formed by controlling the focal length change of the variable focus lens, so as to match different scene requirements. In addition, the variable focus lens has the advantages of continuous focal length adjustment, large focal length adjustment range, fast response speed, low power consumption, small size and the like, so that the flash module can realize large-range and continuous adjustment of the size of the illumination light spot. In addition, the variable focus lens also has the advantages of simple structure, small occupied volume and the like, which is beneficial to integration in a portable electronic device such as a mobile phone.

[0009] In some embodiments, the variable focus lens is a liquid crystal lens or an electrowetting liquid lens. In the flash module provided by the embodiments of the present application, the variable focus lens can be selected from different types of lens devices capable of electrically controlling the adjustment of the focal length, so as to adapt to different application scenarios.

[0010] In some embodiments, the maximum focal length adjustment range of the variable focus lens is 3mm to infinity; that is, the focal length adjustment range of the variable focus lens can be the interval [3mm, ∞); or any interval range in the interval [3mm, ∞). In this way, when the variable focus lens is adjusted in the above focal length range, the size of the illumination light spot will change, so as to adapt to different application scenarios.

[0011] In some embodiments, the variable focus lens is a microlens array, and the microlens array comprises a plurality of microlenses arranged in an array, and the focal length of the microlens is electrically controllable. By controlling the microlenses in the microlens array respectively, the adjustment of the illumination light beam at different positions can be realized, so that the adjustment of the illumination light spot by the variable focus lens is more fine and rich, which is beneficial to adapt to more different application scenarios.

[0012] In some embodiments, the illumination light source comprises one light emitter, and the light emitter is a light emitting diode or a xenon lamp. The flash module provided by the embodiments of the present application can be applied to the illumination light source of a single light emitter, and different types of light emitting devices can be selected for the light emitter, so as to adapt to different application scenarios.

[0013] In some embodiments, the illumination light source comprises a plurality of light emitters arranged in an array, and the light emitters in the plurality of light emitters are individually controllable to be turned on or turned off. In this way, different light source shapes such as a circle, a square, a rectangle, etc. can be generated by controlling the operation of the light emitters at specific positions, so that different sizes and shapes of illumination light spots can be generated after the illumination light beam passes through the collimating device and the variable focus lens, which can adapt to different application scenarios and increase the playability of the flash module.

[0014] In some embodiments, the illumination light source is a liquid crystal display, an organic light-emitting diode display, a sub-millimeter light-emitting diode display, or a micro light-emitting diode display. In the flash module provided in the embodiments of the present application, different types of display devices can be selected as array light sources, which has a wide selection range and can adapt to different application scenarios. In addition, using display devices as array light sources has the advantages of low cost, high reliability, and easy control.

[0015] In some embodiments, the variable focus lens is a microlens array, the microlens array comprises a plurality of microlenses arranged in an array, and the focal length of the microlenses is controllable. The microlenses in the microlens array correspond one-to-one to the light emitters in the illumination light source. In this way, individual control of each light emitter can be achieved, so that the adjustment of the illumination light spot by the variable focus lens is more precise and rich, which is conducive to adapting to more different application scenarios.

[0016] In some embodiments, the collimating device comprises at least one collimating lens. In this way, the collimating effect on the illumination light beam can be achieved, and the light beam quality after the illumination light beam passes through the variable focus lens can be improved.

[0017] In a second aspect, the embodiments of the present application provide an electronic device, which comprises a controller, a camera module, and the flash module of any one of the first aspect. The camera module and the flash module are electrically connected to the controller, and the controller is configured to control the focal length of the variable focus lens in the flash module.

[0018] In some embodiments, the controller is configured to control the focal length of the variable focus lens according to a shooting requirement or a manual setting of a user.

[0019] In some embodiments, the illumination light source in the flash module comprises a plurality of light emitters arranged in an array, and the light emitters in the plurality of light emitters are controllable to be turned on or turned off.

[0020] The controller is electrically connected to the illumination light source and is configured to control the turning on and turning off of the light emitters in the plurality of light emitters.

[0021] The technical effects that the electronic device provided by the embodiments of the present application can achieve are the same as the technical effects that the flash module in any of the above embodiments can achieve, and will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present application;

[0023] FIG. 2 is a connection schematic diagram of a controller in an electronic device provided by an embodiment of the present application;

[0024] FIG. 3 is a structural schematic diagram of a flash module provided by an embodiment of the present application;

[0025] FIG. 4 is a structural schematic diagram of a liquid crystal lens provided by an embodiment of the present application;

[0026] FIG. 5 is a structural schematic diagram of an electrowetting liquid lens provided by an embodiment of the present application;

[0027] FIG. 6 is a schematic diagram of the flash module provided by an embodiment of the present application when the variable focus lens is at the maximum focal length;

[0028] FIG. 7 is a schematic diagram of the illumination spot of the flash module provided by an embodiment of the present application when the variable focus lens is at the maximum focal length;

[0029] FIG. 8 is a schematic diagram of the flash module provided by an embodiment of the present application when the variable focus lens is between the maximum focal length and the minimum focal length;

[0030] FIG. 9 is a schematic diagram of the illumination spot of the flash module provided by an embodiment of the present application when the variable focus lens is between the maximum focal length and the minimum focal length;

[0031] FIG. 10 is a schematic diagram of the flash module provided by an embodiment of the present application when the variable focus lens is at the minimum focal length;

[0032] FIG. 11 is a schematic diagram of the illumination spot of the flash module provided by an embodiment of the present application when the variable focus lens is at the minimum focal length;

[0033] FIG. 12 is a structural schematic diagram of an illumination light source in another flash module provided by an embodiment of the present application;

[0034] FIG. 13 is a schematic diagram of the illumination light source in FIG. 12 in different states;

[0035] FIG. 14 is an architecture diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] Electronic devices such as mobile phones, tablets, etc. are usually equipped with camera modules and flashlights. The electronic devices can realize photographing functions such as photographing, video recording, scanning and identification through the camera modules. The flashlight, as an auxiliary device for photographing, can provide light compensation for the camera module to improve the imaging quality of the camera module, especially in a dark environment. In some cases, the flashlight can also be used as a flashlight for illumination only.

[0037] A conventional flashlight mainly includes a white light-emitting diode (LED) and a Fresnel lens located on the light-emitting side of the LED. The flashlight with the above structure can provide a wide range of illumination within the field of view (FOV) of the camera module, but the illumination range is fixed and cannot meet the photographing requirements of different distances and different photographing ranges.

[0038] For example, when performing long-distance photographing, it is necessary to reduce the illumination spot generated by the flashlight to concentrate the light in a small photographing area. When performing close-range photographing, it is necessary to expand the illumination spot generated by the flashlight to disperse the light in a large photographing area.

[0039] In order to meet different requirements of flashlights for different photographing requirements, some flashlights with adjustable spot size are provided in the related art. For example, in a flashlight provided in the related art, an illumination light source and a curved lens are included. The illumination light source is designed in zones and can be lit in zones to generate illumination beams at different positions. The curved lens is arranged on the light-emitting side of the illumination light source and has different curvatures at different positions. Different zone parts in the illumination light source correspond to different curvature parts of the curved lens one by one. By controlling the area of the illumination light source that is lit, the illumination beam can be made to irradiate different curvature parts of the curved lens, so that the illumination beam can obtain different divergence angles, that is, illumination spots of different sizes, thereby realizing the function of adjusting the size of the illumination spot.

[0040] However, the essence of the above flashlight is the combination of two or more conventional flashlights. Although the function of adjusting the size of the illumination spot can be realized, the size of the adjusted illumination spot is fixed and the number of adjustable sizes is limited, that is, the adjustment of the size of the illumination spot is not continuous, but only has a few discrete adjustable values; which has great limitations. Moreover, the above flashlight cannot realize the collimated spot illumination effect.

[0041] In another flash provided by the related art, a lighting source and a lens group are included, the lens group is used to control the lighting beam generated by the lighting source, and the lens group includes a movable lens which can move along the optical axis direction, the movable lens is driven to move along the optical axis direction by a mechanical device, that is, the purpose of adjusting the overall focal length of the lens group can be achieved, so that the size of the illumination spot formed after the lighting beam passes through the lens group can be adjusted. However, the structure of the flash is complex, occupies a large volume, and it is difficult to integrate on a portable electronic device such as a mobile phone.

[0042] Therefore, the embodiment of the present application provides a flash module and an electronic device to improve the above problems.

[0043] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0044] In the embodiments of the present application, the terms "first", "second", etc. are only used for description convenience, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", etc. can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the embodiments of the present application, "up", "down", "left" and "right" are not limited to the relative positions of the components shown in the drawings, and it should be understood that these directional terms can be relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the position of the components shown in the drawings.

[0046] In the embodiments of the present application, unless the context requires otherwise, in the entire specification and claims, the term "comprising" is interpreted as open, inclusive meaning, that is, "including but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "exemplarily" or "some examples" and the like are intended to indicate that the specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present application. The exemplary representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0047] As used herein, "about," "approximately," or "around" includes the recited value and the average value within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art considering the measurement at issue and the error in measurement associated with the particular quantity being measured (i.e., the limitations of the measurement system).

[0048] As used herein, "parallel," "perpendicular," "equal" includes the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art considering the measurement at issue and the error in measurement associated with the particular quantity being measured (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and near parallel, where near parallel can have an acceptable range of deviation of, for example, within 5°; "perpendicular" includes absolute perpendicular and near perpendicular, where near perpendicular can also have an acceptable range of deviation of, for example, within 5°. "Equal" includes absolute equality and near equality, where near equality can have an acceptable range of deviation of, for example, a difference between the two that is less than or equal to 5% of either.

[0049] It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0050] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations and / or equivalent circuit diagrams that are idealized illustrations. In the interest of clarity, not all of the scale of the layers and regions are necessarily shown to the same scale in the illustrations. Thus, the dimensions of the layers and regions can be arbitrarily increased or decreased for clarity. Specifically, the thickness and width of some layers and regions can be exaggerated normal to the plane of the drawing for clarity. The dimensions of regions in the figures can therefore not be necessarily true to scale. Additionally, the exemplary embodiments are not to be limited to the precise drawing illustrations and terminology used herein.

[0051] The electronic device can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), an Internet device, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) \ virtual reality (VR) device, and the like. The specific type of the electronic device is not specially limited in the embodiments of the present application.

[0052] Referring to FIG. 1, an electronic device 1 is schematically represented by taking a mobile phone as an example. The electronic device 1 includes a camera module 2 and a flash module 3. The camera module 2 is used to implement photographing functions such as photographing, video recording, and scanning recognition, and can include one camera or two or more cameras. In the camera module 2, two or more cameras are provided to expand the application scenarios of the camera module 2 and improve the imaging quality of photographing. In addition, as shown in parts (a) and (b) of FIG. 1, the camera module 2 can be a front camera disposed on the front of the electronic device 1, or a rear camera disposed on the back of the electronic device 1. The electronic device 1 provided in the embodiments of the present application does not limit the specific structure and the setting position of the camera module 2.

[0053] Continuing to refer to FIG. 1, the flash module 3 is disposed close to the camera module 2, and the illumination range thereof should cover the photographing range of the camera module 2. The flash module 3 as a kind of photographing auxiliary device can provide light for the photographing of the camera module 2 through its own light emission, so as to improve the imaging quality in the photographing process of the camera module 2, especially in the dark environment. In some cases, the flash module 3 can also be used as a flashlight and only used for illumination.

[0054] As shown in FIG. 2, the electronic device 1 further includes a controller 4. The camera module 2 and the flash module 3 are electrically connected to the controller 4. The controller 4 is used to process the photographing content of the camera module 2, and is also used to control the related parameters such as the time and the duration of the opening of the flash module 3. The controller 4 can be a SOC (System on Chip, also known as System on a Chip) of the electronic device 1, or an ISP (Image Signal Processor) in the electronic device 1, or other control devices provided in the electronic device 1. The electronic device 1 provided in the embodiments of the present application does not limit the specific type of the controller 4.

[0055] The embodiment of the present application also provides a flash module 3 which can be applied to the electronic device 1 mentioned in the above embodiment.

[0056] As shown in FIG. 3, the flash module 3 comprises an illumination light source 7, a collimating device 6 and a variable focus lens 5. The illumination light source 7 can comprise one or more light emitters 71, and the light emitters 71 in the illumination light source 7 are used to form an illumination light beam projected to the collimating device 6. In the embodiment, the illumination light source 7 adopts a single light emitter 71 design, that is, comprises one light emitter 71. The light emitter 71 can be a light-emitting diode (LED) or a xenon lamp or other light-emitting device. The illumination light beam generated by the light emitter 71 in the illumination light source 7 is a divergent light beam, and the divergent illumination light beam is projected to the collimating device 6.

[0057] The collimating device 6 is used to receive the divergent illumination light beam and project the collimated illumination light beam to the variable focus lens 5. The collimating device 6 can comprise at least one collimating lens and can also comprise an optical lens with other functions. In the collimating device 6, by arranging the optical lens with other functions, on the one hand, the functions of the collimating device 6 can be enriched, and on the other hand, the light beam quality of the illumination light beam projected to the variable focus lens 5 can be improved; thereby the performance of the flash module 3 can be improved. The illumination light beam emitted from the collimating device 6 is irradiated to the variable focus lens 5 and is a collimated light beam.

[0058] The variable focus lens 5 is used to receive the illumination light beam emitted from the collimating device 6 and project the illumination light beam to a side far away from the illumination light source 7 and the collimating device 6, so as to play a function of shooting fill light or illumination. In the flash module 3 provided by the embodiment of the present application, the variable focus lens 5 is a lens device with electrically controlled focal length, that is, the focal length of the variable focus lens 5 can be changed by electric control.

[0059] In some embodiments, the variable focus lens 5 can be a liquid crystal lens. As shown in FIG. 4, the liquid crystal lens 5A comprises a first substrate 8, a second substrate 10 and a liquid crystal layer 9, wherein the first substrate 8 and the second substrate 10 are oppositely arranged, and the liquid crystal layer 9 is arranged between the first substrate 8 and the second substrate 10. The liquid crystal lens 5A further comprises a first electrode and a second electrode arranged on the first substrate 8 and / or the second substrate 10. By applying a voltage on the first electrode and the second electrode, the liquid crystal molecule arrangement of the liquid crystal part between the first electrode and the second electrode in the liquid crystal layer 9 can be changed, so that the liquid crystal lens 5A can generate a focal length corresponding to the applied voltage. By applying different voltages on the first electrode and the second electrode, the liquid crystal lens 5A can generate different focal lengths, thereby achieving the purpose of electrically controlling the focal length of the liquid crystal lens 5A.

[0060] In some other embodiments, the variable-focus lens 5 can be an electrowetting liquid lens, as shown in FIG. 5. The electrowetting liquid lens 5B includes a cavity structure 11, a controlled fluid 15, and a driving electrode. The cavity structure 11 encloses a fluid cavity 14 in which the controlled fluid 15 is accommodated, and a hydrophobic layer is arranged at the bottom 12 of the fluid cavity 14. The controlled fluid 15 is arranged in the fluid cavity 14 and in contact with the hydrophobic layer. The driving electrode includes a first electrode and a second electrode arranged at the bottom 12 and the sidewall 13 of the cavity structure 11, respectively. By applying a voltage between the first electrode and the second electrode, the wettability of the controlled fluid 15 on the hydrophobic layer can be changed, i.e., the contact angle is changed, so that the controlled fluid 15 is deformed, displaced, or the like, thereby forming a lens structure with a certain focal length. Moreover, by applying different voltages on the first electrode and the second electrode, the electrowetting liquid lens 5B can have different focal lengths, thereby achieving the purpose of electrically adjusting the focal length of the electrowetting liquid lens 5B.

[0061] The variable-focus lens 5 can also be other types of lenses capable of electrically adjusting the focal length. The flash module 3 provided in the embodiments of the present application does not limit the specific type and specific structure of the variable-focus lens 5. In the flash module 3 provided in the embodiments of the present application, by changing the focal length of the variable-focus lens 5, the divergence angle of the illumination light beam when exiting the variable-focus lens 5 can be changed, thereby changing the size of the illumination light spot formed by the illumination light beam, and achieving the purpose of adjusting the size of the illumination light spot generated by the illumination light beam to match different application scenarios.

[0062] For example, FIG. 6 is a schematic diagram of the flash module 3 provided in the embodiments of the present application when the variable-focus lens 5 is at the maximum focal length, and FIG. 7 is a schematic diagram of the illumination light spot of the flash module 3 provided in the embodiments of the present application when the variable-focus lens 5 is at the maximum focal length. In FIG. 7, (a), (b), and (c) are respectively a simulation diagram of the illumination light spot, an intensity distribution diagram of the illumination light spot, and a real photo of the illumination light spot. It should be noted that, since the illumination light spot generated by the flash module 3 shown in FIG. 6 has the characteristic that the intensity distribution is consistent in the orthogonal direction, the abscissa of the (b) part in FIG. 7 can be any direction in the orthogonal direction.

[0063] As shown in FIG. 6 and FIG. 7, when the variable-focus lens 5 is at the maximum focal length, the divergence angle of the collimated illumination light beam after passing through the variable-focus lens 5 is at the minimum state, the energy of the illumination light beam is concentrated in a small area, and the size of the illumination light spot is small. This state can be suitable for supplementing light for shooting at a long distance and a small field of view (FOV).

[0064] In some special cases, when the maximum focal length of the variable focus lens 5 is infinite or approximately infinite, the divergence angle of the collimated illumination beam after passing through the variable focus lens 5 is equal to or close to 0, and the illumination beam exiting from the variable focus lens 5 can be considered to still be in a collimated state, forming an illumination spot similar to the shape of the illumination source 7, thereby achieving the effect of collimated illumination.

[0065] As another example, FIG. 8 is a schematic diagram of the flash module 3 according to an embodiment of the present application when the variable focus lens 5 is between the maximum focal length and the minimum focal length, and FIG. 9 is a schematic diagram of the illumination spot of the flash module 3 according to an embodiment of the present application when the variable focus lens 5 is between the maximum focal length and the minimum focal length; wherein (a), (b) and (c) in FIG. 9 are respectively a simulation diagram of the illumination spot, an intensity distribution diagram of the illumination spot and a photograph of the illumination spot. It should be noted that, since the illumination spot generated by the flash module 3 shown in FIG. 8 has the characteristic that the intensity distribution is consistent in the orthogonal direction, the abscissa in (b) in FIG. 9 can be any direction in the orthogonal direction.

[0066] As shown in FIGS. 8 and 9, when the variable focus lens 5 gradually shrinks from the maximum focal length to the minimum focal length, the divergence angle of the collimated illumination beam after passing through the variable focus lens 5 gradually expands, the energy of the illumination beam is concentrated in a larger area, and the size of the formed illumination spot increases. This state can be suitable for light supplementing for shooting at a medium distance and a medium field of view.

[0067] As another example, FIG. 10 is a schematic diagram of the flash module 3 according to an embodiment of the present application when the variable focus lens 5 is at the minimum focal length, and FIG. 11 is a schematic diagram of the illumination spot of the flash module 3 according to an embodiment of the present application when the variable focus lens 5 is at the minimum focal length; wherein (a), (b) and (c) in FIG. 11 are respectively a simulation diagram of the illumination spot, an intensity distribution diagram of the illumination spot and a photograph of the illumination spot. It should be noted that, since the illumination spot generated by the flash module 3 shown in FIG. 10 has the characteristic that the intensity distribution is consistent in the orthogonal direction, the abscissa in (b) in FIG. 11 can be any direction in the orthogonal direction.

[0068] As shown in FIGS. 10 and 11, when the variable focus lens 5 is at the minimum focal length, the divergence angle of the collimated illumination beam after passing through the variable focus lens 5 expands to the maximum state, the energy of the illumination beam is distributed in a larger area, and the size of the formed illumination spot further increases. This state can be suitable for light supplementing for shooting at a near distance and a large field of view.

[0069] It can be seen that, in the flash module 3 provided in the embodiments of the present application, by changing the focal length of the variable focus lens 5, the divergence angle of the illumination light beam when exiting the variable focus lens 5 can be changed, thereby changing the size of the illumination light spot formed by the illumination light beam, and the purpose of adjusting the size of the illumination light spot generated by the illumination light beam is achieved, so as to match different application scenarios.

[0070] Please continue to refer to FIG. 2. The variable focus lens 5 in the flash module 3 is electrically connected to the corresponding controller 4 in the electronic device 1. The controller 4 is configured to output instructions for controlling the focal length of the variable focus lens 5. Under the action of different control instructions, the variable focus lens 5 exhibits different focal lengths. The controller 4 can automatically determine the control parameter of the variable focus lens 5, i.e., the focal length of the variable focus lens 5, according to the actual shooting requirement, so that the flash module 3 can generate light compensation matching the actual shooting requirement. The controller 4 can also determine the control parameter of the variable focus lens 5, i.e., the focal length of the variable focus lens 5, based on the manual setting of the user for the flash module 3, so that the flash module 3 can generate light compensation consistent with the manual setting of the user.

[0071] It can be seen that, by using the flash module 3 with the above structure, different sizes of illumination light spots can be formed by controlling the focal length change of the variable focus lens 5, thereby matching different scene requirements. In addition, the variable focus lens 5 has the advantages of continuous focal length adjustment, large focal length adjustment range, fast response speed, low power consumption, and small size, etc., so that the flash module 3 can realize large-range and continuous adjustment of the size of the illumination light spot. In addition, the above functions are realized by the variable focus lens 5, which also has the advantages of simple structure, small occupied volume, etc., and is conducive to integration in portable electronic devices 1 such as mobile phones.

[0072] It can also be seen from the above description that the size of the illumination light spot generated by the flash module 3 and the adjustment range are related to the shooting range of the camera module 2, i.e., the shooting distance (i.e., the shooting focal length) of the camera module 2 and the field of view angle at different shooting distances. Therefore, the structural parameters of the flash module 3, such as the focal length adjustment range of the variable focus lens 5, can be designed according to the parameters of the camera module 2.

[0073] In some embodiments, the maximum focal length adjustment range of the variable focus lens 5 is 3mm to infinity ( ). That is, the focal length adjustment range of the variable focus lens 5 can be the interval [3mm, ); or any interval range in [3mm, ); for example, the focal length adjustment range of the variable focus lens 5 can be [3mm, 60mm], [5mm, 180mm], [10mm, 200mm], or [10mm, ), etc. When the variable focus lens 5 is adjusted in the above focal length range, the size of the illumination light spot will change, thereby being able to adapt to different application scenarios.

[0074] In some embodiments, the variable focus lens 5 can also be a micro-lens array, which includes a plurality of micro-lenses arranged in an array, and the focal length of each micro-lens can be electrically controlled. For the structure of the micro-lens and the effect of the change of the focal length on the illumination light beam, reference can be made to the description of the variable focus lens 5 above. In this embodiment, by controlling the micro-lenses in the micro-lens array respectively, the adjustment of the illumination light beam at different positions can be realized, so that the adjustment of the variable focus lens 5 on the illumination spot is more fine and rich, which is conducive to adapting to more different application scenarios.

[0075] The application also provides another flash module 3, which is different from the flash module 3 in the above embodiment in that the illumination light source 7. In this embodiment, as shown in FIG. 12, the illumination light source 7 is an array light source, which includes a plurality of light emitters 71 arranged in an array, and each light emitter 71 can be controlled to be turned on or off independently. In this way, by controlling the turning on and off of the light emitters 71 at different positions, the purpose of changing the light source shape and the light source size of the illumination light source 7 can be achieved. As shown in FIG. 13(a), (b) and (c), by controlling the light emitters 71 at some specific positions to work, different light source shapes such as a circle, a square and a rectangle can be generated. Thus, after the illumination light beam passes through the collimating device 6 and the variable focus lens 5, illumination spots of different sizes and shapes can be generated, which can adapt to different application scenarios and increase the playability of the flash module 3.

[0076] For example, the illumination light source 7 can select a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, a mini light-emitting diode (Mini LED) display or a micro light-emitting diode (Micro LED) display as an array light source. The above display devices all include a plurality of light emitting devices arranged in an array, and each light emitting device can be used as a light emitter 71 in the illumination light source 7.

[0077] In this embodiment, the illumination light source 7 is electrically connected with the corresponding controller 4 in the electronic device 1, and the controller 4 is configured to control the turning on and off of the light emitters 71 in the plurality of light emitters 71.

[0078] In the case where the variable focus lens 5 selects a micro-lens array, the micro-lenses of the micro-lens array can correspond to the light emitters 71 in the array light source one by one; so that the individual control of each light emitter 71 can be realized; so that the adjustment of the variable focus lens 5 on the illumination spot is more fine and rich, which is conducive to adapting to more different application scenarios.

[0079] FIG. 14 is an architecture diagram of an electronic device 1 provided by an embodiment of the present application. As shown in FIG. 14, the electronic device 1 can include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headset jack 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc.

[0080] The sensor module 180 can include a pressure sensor 180A, a gyroscope sensor 180B, a barometric sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0081] The processor 110 can include one or more processing units, for example: the processor 110 can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units can be independent devices or integrated in one or more processors.

[0082] The controller can be the nerve center and command center of the electronic device 1. The controller can generate operation control signals according to instruction operation codes and timing signals to complete the control of fetching and executing instructions.

[0083] The processor 110 can also include a memory that stores instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The cache memory can hold instructions or data that the processor 110 has recently used or is likely to use again. If the processor 110 needs to use the instructions or data again, it can be retrieved directly from the cache memory. This avoids repeated accesses to the main memory, reducing the latency of the processor 110 and thus improving the efficiency of the system.

[0084] In some embodiments, the processor 110 can include one or more interfaces. The interfaces can include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0085] The I2C interface is a bidirectional synchronous serial bus that includes a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 110 can include multiple sets of I2C buses. The processor 110 can be coupled to the touch sensor 180K, the charger, the flash, the camera 193, etc. through different I2C bus interfaces. For example, the processor 110 can be coupled to the touch sensor 180K through an I2C interface, enabling the processor 110 and the touch sensor 180K to communicate through the I2C bus interface and implement the touch function of the electronic device 1.

[0086] The I2S interface can be used for audio communication. In some embodiments, the processor 110 can include multiple sets of I2S buses. The processor 110 can be coupled to the audio module 170 through the I2S bus, enabling communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 can deliver audio signals to the wireless communication module 160 through the I2S interface, enabling the function of answering a phone call through a Bluetooth headset.

[0087] The PCM interface can also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 170 can be coupled with the wireless communication module 160 through a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the wireless communication module 160 through the PCM interface, enabling the function of answering a phone call through a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

[0088] The UART interface is a universal serial bus for asynchronous communication. The bus can be a bidirectional communication bus. It converts data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is usually used to connect the processor 110 and the wireless communication module 160. For example, the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface, enabling Bluetooth functionality. In some embodiments, the audio module 170 can transmit audio signals to the wireless communication module 160 through the UART interface, enabling the function of playing music through a Bluetooth headset.

[0089] The MIPI interface can be used to connect the processor 110 and peripheral devices such as the display screen 194 and the camera 193. The MIPI interface includes the camera serial interface (CSI), the display serial interface (DSI), etc. In some embodiments, the processor 110 and the camera 193 communicate through the CSI interface, enabling the camera function of the electronic device 1. The processor 110 and the display screen 194 communicate through the DSI interface, enabling the display function of the electronic device 1.

[0090] The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface can be used to connect the processor 110 and the camera 193, the display screen 194, the wireless communication module 160, the audio module 170, the sensor module 180, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

[0091] The USB interface 130 is an interface conforming to the USB standard specification, and can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the electronic device 1, and can also be used to transmit data between the electronic device 1 and a peripheral device. It can also be used to connect a headset to play audio through the headset. The interface can also be used to connect other electronic devices 1, such as AR devices, etc. In some embodiments, the USB interface 130 can be USB 3.0, which is compatible with display port (DP) signal transmission, and can transmit high-speed audio and video data.

[0092] It can be understood that the interface connection relationship between the modules shown in the embodiments of the present application is only illustrative and does not constitute a structural limitation on the electronic device 1. In some other embodiments of the present application, the electronic device 1 can also use different interface connection methods or combinations of multiple interface connection methods in the above embodiments.

[0093] The charging management module 140 is used to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 can receive charging input from a wired charger through the USB interface 130. In some wireless charging embodiments, the charging management module 140 can receive wireless charging input through a wireless charging coil of the electronic device 1. The charging management module 140 can charge the battery 142 while also supplying power to the electronic device 1 through the power management module 141. The number of batteries 142 can be one or more.

[0094] The power management module 141 is used to connect the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and / or the charging management module 140 to supply power to the processor 110, the internal memory 121, the external memory, the display screen 194, the camera 193, and the wireless communication module 160, etc. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle count, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 141 can also be disposed in the processor 110. In some other embodiments, the power management module 141 and the charging management module 140 can also be disposed in the same device.

[0095] The wireless communication function of the electronic device 1 can be realized through an antenna, a mobile communication module 150, a wireless communication module 160, a modem processor, and a baseband processor, etc.

[0096] The antennas are used for transmitting and receiving electromagnetic wave signals. The number of antennas is multiple, and the multiple antennas can work independently of each other or in combination. Each antenna in the electronic device 1 can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: antenna 1 can be multiplexed as a diversity antenna of a wireless local area network. In some other embodiments, the antennas can be used in combination with a tuning switch.

[0097] The mobile communication module 150 can provide a solution including 2G / 3G / 4G / 5G wireless communication applied to the electronic device 1. The mobile communication module 150 can include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves by the antenna 1, and perform filtering, amplification, etc. on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 can also amplify the signals modulated by the modem processor, and convert the amplified signals into electromagnetic waves to be radiated through the antenna 1. In some embodiments, at least part of the functional modules of the mobile communication module 150 can be disposed in the processor 110. In some embodiments, at least part of the functional modules of the mobile communication module 150 can be disposed in the same device as at least part of the modules of the processor 110.

[0098] The modem processor can include a modulator and a demodulator. The modulator is used to modulate a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low-frequency baseband signal processed by the baseband processor is transmitted to the application processor. The application processor outputs a sound signal through an audio device (not limited to a loudspeaker 170A, a receiver 170B, etc.), or displays an image or a video through the display screen 194. In some embodiments, the modem processor can be an independent device. In some other embodiments, the modem processor can be independent of the processor 110, and disposed in the same device as the mobile communication module 150 or other functional modules.

[0099] The wireless communication module 160 can provide a solution for wireless communication including wireless local area networks (WLAN) (e.g., wireless fidelity (Wi-Fi) network), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) technology, etc. applied to the electronic device 1. The wireless communication module 160 can be one or more devices that integrate at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, frequency-modulates and filters the electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 can also receive signals to be transmitted from the processor 110, frequency-modulate them, amplify them, and radiate them as electromagnetic waves via the antenna 2.

[0100] In some embodiments, the antenna 1 and the mobile communication module 150 of the electronic device 1 are coupled, and the antenna 2 and the wireless communication module 160 are coupled, so that the electronic device 1 can communicate with a network and other devices through wireless communication technology. The wireless communication technology can include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TDSCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technology, etc. The GNSS can include a global positioning system (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and / or a satellite based augmentation systems (SBAS).

[0101] The electronic device 1 implements a display function through a GPU, a display screen 194, and an application processor, etc. The GPU is a microprocessor for image processing, connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 can include one or more GPUs that execute program instructions to generate or change display information.

[0102] The display screen 194 is used to display images, videos, etc. The electronic device 1 can include 1 or N display screens 194, N being a positive integer greater than 1.

[0103] The electronic device 1 can implement a photographing function through an ISP, a camera 193, a video codec, a GPU, a display screen 194, and an application processor, etc.

[0104] ISP is used to process the data feedback from the camera 193. For example, when taking a photo, the shutter is opened, the light is transmitted to the camera photosensitive element through the lens, the light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and conversion into a visible image. ISP can also optimize the noise, brightness, and skin color of the image. ISP can also optimize the exposure, color temperature, and other parameters of the shooting scene. In some embodiments, ISP can be provided in the camera 193.

[0105] The camera 193 is used to capture still images or videos. Objects generate optical images through lenses and project them onto photosensitive elements. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the light signal into an electrical signal, which is then transmitted to the ISP for conversion into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into a standard RGB, YUV, or other format image signal. In some embodiments, the electronic device 1 can include one or N cameras 193, where N is a positive integer greater than 1.

[0106] The digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the electronic device 1 selects a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy, etc.

[0107] The video codec is used to compress or decompress digital video. The electronic device 1 can support one or more video codecs. In this way, the electronic device 1 can play or record videos in multiple encoding formats, such as moving picture experts group (MPEG) 1, MPEG 2, MPEG 3, MPEG 4, etc.

[0108] NPU is a neural-network (NN) computing processor that learns from biological neural network structures, such as the transmission mode between human brain neurons, to quickly process input information and continuously self-learn. Through NPU, the electronic device 1 can achieve intelligent cognition applications such as image recognition, face recognition, voice recognition, and text understanding.

[0109] The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to extend the storage capacity of the electronic device 1. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music and videos are stored in the external memory card.

[0110] The internal memory 121 can be used to store computer executable program codes including instructions. The processor 110 executes various function applications and data processing of the electronic device 1 by running the instructions stored in the internal memory 121. The internal memory 121 can include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), and the like. The data storage area can store data created during the use of the electronic device 1 (such as audio data, a phone book, etc.), and the like. In addition, the internal memory 121 can include a high-speed random access memory, and can further include a non-volatile memory such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), and the like.

[0111] The electronic device 1 can implement an audio function through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. For example, music playing, recording, and the like.

[0112] The audio module 170 is configured to convert digital audio information into an analog audio signal output, and to convert an analog audio input into a digital audio signal. The audio module 170 can also be configured to encode and decode audio signals. In some embodiments, the audio module 170 can be disposed in the processor 110, or some of the functions of the audio module 170 can be disposed in the processor 110. The speaker 170A, also referred to as a "loudspeaker", is configured to convert an audio electrical signal into a sound signal. The electronic device 1 can listen to music or listen to a hands-free call through the speaker 170A. The receiver 170B, also referred to as a "earpiece", is configured to convert an audio electrical signal into a sound signal. When the electronic device 1 is on a call or receiving a voice message, a user can listen to the voice by holding the receiver 170B close to an ear. The microphone 170C, also referred to as a "microphone", "microphone", is configured to convert a sound signal into an electrical signal. When making a call or sending a voice message, a user can speak into the microphone 170C by holding the microphone 170C close to the mouth, and input the sound signal into the microphone 170C. The electronic device 1 can be provided with at least one microphone 170C. In other embodiments, the electronic device 1 can be provided with two microphones 170C, in addition to collecting sound signals, noise reduction functions can also be achieved. In other embodiments, the electronic device 1 can also be provided with three, four or more microphones 170C, in addition to collecting sound signals, noise reduction, and can also identify the source of the sound, and realize the function of directional recording, etc.

[0113] The earphone interface 170D is configured to connect a wired earphone. The earphone interface 170D can be a USB interface 130, or a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0114] The pressure sensor 180A is configured to sense a pressure signal, and can convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A can be disposed on the display screen 194. There are many types of pressure sensors 180A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, etc. The capacitive pressure sensor can include at least two parallel plates made of conductive material. When a force is applied to the pressure sensor 180A, the capacitance between the electrodes changes. The electronic device 1 determines the intensity of the pressure according to the change in capacitance. When a touch operation is applied to the display screen 194, the electronic device 1 detects the intensity of the touch operation according to the pressure sensor 180A. The electronic device 1 can also calculate the position of the touch according to the detection signal of the pressure sensor 180A.

[0115] In some embodiments, touch operations acting on the same touch position but with different touch operation intensities can correspond to different operation instructions. For example, when a touch operation with a touch operation intensity less than a first pressure threshold acts on a short message application icon, an instruction of viewing short messages is executed. When a touch operation with a touch operation intensity greater than or equal to the first pressure threshold acts on the short message application icon, an instruction of creating a new short message is executed.

[0116] The gyroscope sensor 180B can be used to determine the motion posture of the electronic device 1. In some embodiments, the angular velocity of the electronic device 1 around three axes (i.e., x, y, and z axes) can be determined by the gyroscope sensor 180B. The gyroscope sensor 180B can be used for anti-shake shooting. For example, when the shutter is pressed, the gyroscope sensor 180B detects the angle of shaking of the electronic device 1, calculates the distance that the lens module needs to compensate according to the angle, and lets the lens offset the shaking of the electronic device 1 by reverse movement to achieve anti-shake. The gyroscope sensor 180B can also be used for navigation and motion sensing game scenarios.

[0117] In the embodiments of the present application, the display screen 194 of the electronic device 1 can be a foldable display screen, which can be folded to form at least two sub-screens. The gyroscope sensor 180B can be arranged in the sub-screens to measure the orientation (i.e., the direction vector of the orientation) of the corresponding sub-screens. The electronic device 1 can determine the included angle between adjacent sub-screens (e.g., the included angle between screen A and screen B) and the relationship between each sub-screen and the horizontal plane according to the change in the orientation angle of each sub-screen measured by the gyroscope sensor 180B.

[0118] The barometric pressure sensor 180C is used to measure air pressure. In some embodiments, the electronic device 1 calculates the altitude, assists in positioning and navigation by using the air pressure value measured by the barometric pressure sensor 180C.

[0119] The magnetic sensor 180D includes a Hall sensor. The electronic device 1 can detect the opening and closing of a flip cover by using the magnetic sensor 180D. In some embodiments, when the electronic device 1 is a flip phone, the electronic device 1 can detect the opening and closing of the flip cover according to the magnetic sensor 180D. Then, according to the detected opening and closing state of the cover or the opening and closing state of the flip cover, the electronic device 1 can set the feature of automatically unlocking the flip cover, etc.

[0120] The acceleration sensor 180E can detect the acceleration of the electronic device 1 in each direction (generally three axes). When the electronic device 1 is stationary, the acceleration sensor 180E can detect the size and direction of gravity. It can also be used to identify the posture of the electronic device 1 and applied to landscape / portrait screen switching, pedometer, etc.

[0121] It should be noted that in the embodiments of the present application, the display screen 194 of the electronic device 1 can be folded to form multiple screens. Each screen can include an acceleration sensor 180E for measuring the orientation of the corresponding screen (i.e., the direction vector of the orientation).

[0122] A distance sensor 180F is configured to measure distance. The electronic device 1 can measure distance by infrared or laser. In some embodiments, the electronic device 1 can use the distance sensor 180F to measure distance to achieve fast focusing when taking a picture of a scene.

[0123] A proximity light sensor 180G can include, for example, a light-emitting diode (LED) and a light detector, such as a photodiode. The light-emitting diode can be an infrared light-emitting diode. The electronic device 1 emits infrared light outwardly through the light-emitting diode. The electronic device 1 detects infrared reflected light from nearby objects using the photodiode. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device 1. When insufficient reflected light is detected, the electronic device 1 can determine that there is no object near the electronic device 1. The electronic device 1 can use the proximity light sensor 180G to detect that a user is holding the electronic device 1 close to the ear for a call, so as to automatically turn off the screen to achieve the purpose of power saving. The proximity light sensor 180G can also be used for automatic unlocking and locking of the screen in a holster mode or a pocket mode.

[0124] An ambient light sensor 180L is configured to sense ambient light brightness. The electronic device 1 can adaptively adjust the brightness of the display screen 194 according to the sensed ambient light brightness. The ambient light sensor 180L can also be used to automatically adjust the white balance when taking a picture. The ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the electronic device 1 is in a pocket to prevent accidental touch.

[0125] A fingerprint sensor 180H is configured to collect a fingerprint. The electronic device 1 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locking, fingerprint photographing, fingerprint answering a call, and the like.

[0126] A temperature sensor 180J is configured to detect temperature. In some embodiments, the electronic device 1 uses the temperature detected by the temperature sensor 180J to implement a temperature handling strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold value, the electronic device 1 reduces the performance of a processor located near the temperature sensor 180J to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold value, the electronic device 1 heats the battery 142 to avoid abnormal shutdown of the electronic device 1 caused by low temperature. In other embodiments, when the temperature is lower than yet another threshold value, the electronic device 1 performs voltage boosting on the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.

[0127] Touch sensor 180K, also called "touch panel". Touch sensor 180K can be disposed on display screen 194, and touch screen, also called "touch panel", is composed of touch sensor 180K and display screen 194. Touch sensor 180K is used to detect touch operation acting on or near it. Touch sensor can transmit detected touch operation to application processor to determine touch event type. Visual output related to touch operation can be provided through display screen 194. In other embodiments, touch sensor 180K can also be disposed on the surface of electronic device 1, which is different from the position where display screen 194 is located.

[0128] Bone conduction sensor 180M can obtain vibration signal. In some embodiments, bone conduction sensor 180M can obtain vibration signal of human body sound vibration bone block. Bone conduction sensor 180M can also contact human body pulse to receive blood pressure pulsation signal. In some embodiments, bone conduction sensor 180M can also be disposed in earphone to form bone conduction earphone. Audio module 170 can analyze voice signal based on vibration signal of sound vibration bone block obtained by bone conduction sensor 180M to realize voice function. Application processor can analyze heart rate information based on blood pressure pulsation signal obtained by bone conduction sensor 180M to realize heart rate detection function.

[0129] Keys 190 include power on key, volume key, etc. Keys 190 can be mechanical keys. They can also be touch keys. Electronic device 1 can receive key input to generate key signal input related to user settings and function control of electronic device 1.

[0130] Motor 191 can generate vibration prompt. Motor 191 can be used for incoming call vibration prompt, and also can be used for touch vibration feedback. For example, touch operation acting on different applications (such as taking pictures, playing audio, etc.) can correspond to different vibration feedback effects. Touch operation acting on different areas of display screen 194 can also correspond to different vibration feedback effects of motor 191. Different application scenarios (such as time reminder, receiving information, alarm, game, etc.) can also correspond to different vibration feedback effects. Touch vibration feedback effect can also support customization.

[0131] Indicator 192 can be indicator light, which can be used to indicate charging state, power change, and also can be used to indicate message, missed call, notification, etc.

[0132] The SIM card interface 195 is configured to connect a SIM card. The SIM card can be inserted into or pulled out of the SIM card interface 195 to realize contact and separation with the electronic device 1. The electronic device 1 can support one or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support a Nano SIM card, a Micro SIM card, a SIM card, and the like. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the multiple cards can be the same or different. The SIM card interface 195 can be compatible with different types of SIM cards. The SIM card interface 195 can also be compatible with external storage cards. The electronic device 1 interacts with a network through the SIM card to realize functions such as call and data communication. In some embodiments, the electronic device 1 uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the electronic device 1 and cannot be separated from the electronic device 1.

[0133] It should be noted that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device 1. The electronic device 1 can include more or fewer components than illustrated, or combine certain components, or split certain components, or different component arrangements. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0134] The electronic device 1 provided by the embodiments of the present application can achieve the same technical effects as the flash module 3 described in any of the above embodiments, which will not be repeated here.

[0135] The above describes only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A flashlight module, characterized in that: It includes an illumination light source, a collimating device and a variable focus lens; Wherein, the illumination light source is used to form an illumination light beam projected toward the collimating device; The collimating device is used to receive the illumination light beam, collimate the illumination light beam and then project it onto the variable focus lens; The variable focus lens is used to project the illumination light beam, and the focal length is electrically adjustable.

2. The flash module according to claim 1, wherein: The variable focus lens is a liquid crystal lens or an electrowetting liquid lens.

3. The flash module according to claim 1 or 2, characterized in that: The maximum focal length adjustment range of the variable focus lens is from 3 mm to infinity.

4. The flash module according to claim 1 or 3, characterized in that: The variable focus lens is a microlens array, which includes a plurality of microlenses arranged in an array, and the focal length of the microlenses is electrically adjustable.

5. The flash module according to any one of claims 1 to 4, characterized in that: The lighting source includes a light emitting body, which is a light emitting diode or a xenon lamp.

6. The flash module according to any one of claims 1 to 4, characterized in that: The lighting source includes a plurality of light-emitting bodies arranged in an array, and the light-emitting bodies in the plurality of light-emitting bodies can be individually electrically controlled to be turned on or off.

7. The flash module according to claim 6, wherein: The lighting source is a liquid crystal display, an organic light emitting diode display, a sub-millimeter light emitting diode display or a micro light emitting diode display.

8. The flash module according to claim 6 or 7, characterized in that: The variable focus lens is a microlens array, which includes a plurality of microlenses arranged in an array, and the focal length of the microlenses is electrically adjustable; The microlenses in the microlens array correspond one-to-one to the illuminants in the illumination light source.

9. The flash module according to any one of claims 1 to 8, characterized in that: The collimating device comprises at least one collimating lens.

10. An electronic device, characterized in that: The electronic device comprises: Controller; A camera module, the camera module is used for image capture; and The flash module according to any one of claims 1 to 9; Wherein, the camera module and the flash module are both electrically connected to the controller, and the controller is configured to control the focal length of the variable focus lens in the flash module.

11. The electronic device according to claim 10, wherein: The controller is configured to control the focal length of the variable focus lens according to shooting requirements and / or manual settings of a user.

12. The electronic device according to claim 10 or 11, characterized in that: The illumination light source in the flash module includes a plurality of light-emitting bodies arranged in an array, and the light-emitting bodies in the plurality of light-emitting bodies can be electrically controlled to be turned on or off; The controller is electrically connected to the lighting source and is configured to control turning on and off of the light-emitting elements among the plurality of light-emitting elements.

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