Flash lamp module and electronic equipment

Abstract

The embodiment of the invention provides a flash lamp module and electronic equipment, relates to the field of electronic equipment, and aims to solve the problems that a flash lamp with a light spot adjusting function is limited in adjusting range and large in structure occupied volume. The flash lamp module comprises an illumination light source, a collimation device and a variable-focus lens, wherein the illumination light source is used for forming an illumination light beam projected to the collimation device; the collimating device is used for receiving the illumination light beam, collimating the illumination light beam and projecting the collimated illumination light beam to the variable-focus lens; the variable-focus lens is used for projecting an illumination light beam, and the focal length is electrically controlled and adjustable. The flash lamp module can be applied to the electronic equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to a flash module and an electronic device. BACKGROUND

[0002] Electronic devices such as mobile phones and tablet computers are usually equipped with camera modules and flashlights. The electronic devices can realize photographing functions such as photographing, video recording, and scanning identification through the camera modules. The flashlight, as an auxiliary device for photographing, can provide supplementary light for the photographing of the camera module through the illumination beam generated by itself, so as 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 and used only for illumination.

[0003] 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. For example, when photographing at a long distance, the illumination spot generated by the flashlight needs to be reduced so that the light is concentrated in a small photographing area. When photographing at a short distance, the illumination spot generated by the flashlight needs to be expanded so that the light is dispersed in a large photographing area. Therefore, some flashlights with adjustable spot sizes are provided in the related art. However, some of these flashlights have the limitation of a limited spot size adjustment range. Some of these flashlights have a complex structure, occupy a large volume, and are difficult to integrate into portable electronic devices such as mobile phones. SUMMARY

[0004] Embodiments of the present application provide a flashlight module and an electronic device to improve the problems of a limited adjustment range and a large structure volume of a flashlight with a spot size adjustment function.

[0005] To achieve the above-mentioned purpose, embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a flashlight module, which includes an illumination light source, a collimating device, and a variable focus lens. The illumination light source is configured to form an illumination beam projected to the collimating device. The collimating device is configured to receive the illumination beam and project the collimated illumination beam to the variable focus lens. The variable focus lens is configured to project the illumination beam, and the focal length of the variable focus lens is electrically controllable.

[0007] The flash lamp module with the above structure can form illumination light spots of different sizes by controlling the focal length change of the variable focus lens, thereby matching different scene requirements. Moreover, 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, thereby enabling the flash lamp module to 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 and small occupied volume, which is conducive to integration in a portable electronic device 1 such as a mobile phone.

[0008] In some embodiments, the variable focus lens is a liquid crystal lens or an electrowetting liquid lens. In the flash lamp module provided in the embodiments of the present application, different types of lens devices capable of realizing electrically controlled adjustment of the focal length can be selected, and the selection range is large, which can adapt to different application scenarios.

[0009] 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, thereby being able to adapt to different application scenarios.

[0010] In some embodiments, the variable focus lens is a microlens array, and the microlens array includes a plurality of microlenses arranged in an array, and the focal length of the microlenses is electrically controllable. By controlling the microlenses in the microlens array respectively, adjustment of the illumination light beams at different positions can be realized, thereby making the adjustment of the illumination light spot by the variable focus lens more fine and rich, which is conducive to adapting to more different application scenarios.

[0011] In some embodiments, the illumination light source includes one light emitter, and the light emitter is a light-emitting diode or a xenon lamp. The flash lamp module provided in the embodiments of the present application can be applied to an illumination light source of a single light emitter, and different types of light-emitting devices can be selected for the light emitter, and the selection range is large, which can adapt to different application scenarios.

[0012] In some embodiments, the illumination light source includes a plurality of light emitters arranged in an array, and the light emitters in the plurality of light emitters can be individually controlled to be turned on or turned off. In this way, by controlling the light emitters at some specific positions to work, different light source shapes such as a circle, a square, and a rectangle can be generated; thereby, after the illumination light beam passes through the collimating device and the variable focus lens, illumination light spots of different sizes and different shapes can be generated, which can adapt to different application scenarios and can increase the playability of the flash lamp module.

[0013] 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 lamp module provided by the embodiments of the present application, different types of display devices can be selected as array light sources, the selection range is large, and different application scenarios can be adapted. In addition, the display device is selected as the array light source, which has the advantages of low cost, high reliability, and easy control.

[0014] In some embodiments, the variable focus lens is a micro-lens array, the micro-lens array includes a plurality of micro-lenses arranged in an array, and the focal length of the micro-lens is electrically controllable. The micro-lens in the micro-lens array corresponds to a light emitter in the illumination light source one by one. In this way, the control of each light emitter can be realized, so that the adjustment of the illumination spot by the variable focus lens is more fine and rich, which is beneficial to adapt to more different application scenarios.

[0015] In some embodiments, the collimating device includes at least one collimating lens. In this way, the collimating effect of the illumination light beam can be realized, and the light beam quality after the illumination light beam passes through the variable focus lens can be improved.

[0016] In a second aspect, the embodiments of the present application provide an electronic device, which includes a controller, a camera module, and the flash lamp module of any one of the first aspect. The camera module and the flash lamp 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 lamp module.

[0017] In some embodiments, the controller is configured to control the focal length of the variable focus lens according to the shooting requirement or the manual setting of the user.

[0018] In some embodiments, the illumination light source in the flash lamp module includes a plurality of light emitters arranged in an array, and the light emitters in the plurality of light emitters can be electrically controlled to be turned on or turned off.

[0019] 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.

[0020] The electronic device provided by the embodiments of the present application can achieve the same technical effects as the flash lamp module in any of the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural schematic diagram of an electronic device provided by the embodiments of the present application;

[0022] Figure 2 A connection schematic diagram of a controller in an electronic device provided by the embodiments of the present application;

[0023] Figure 3A structural schematic diagram of a flash module provided by an embodiment of the present application;

[0024] Figure 4 A structural schematic diagram of a liquid crystal lens provided by an embodiment of the present application;

[0025] Figure 5 A structural schematic diagram of an electrowetting liquid lens provided by an embodiment of the present application;

[0026] Figure 6 A schematic diagram of a flash module provided by an embodiment of the present application when a variable focus lens is at a maximum focal length;

[0027] Figure 7 A schematic diagram of an illumination light spot of a flash module provided by an embodiment of the present application when a variable focus lens is at a maximum focal length;

[0028] Figure 8 A schematic diagram of a flash module provided by an embodiment of the present application when a variable focus lens is between a maximum focal length and a minimum focal length;

[0029] Figure 9 A schematic diagram of an illumination light spot of a flash module provided by an embodiment of the present application when a variable focus lens is between a maximum focal length and a minimum focal length;

[0030] Figure 10 A schematic diagram of a flash module provided by an embodiment of the present application when a variable focus lens is at a minimum focal length;

[0031] Figure 11 A schematic diagram of an illumination light spot of a flash module provided by an embodiment of the present application when a variable focus lens is at a minimum focal length;

[0032] Figure 12 A structural schematic diagram of an illumination light source in another flash module provided by an embodiment of the present application;

[0033] Figure 13 A structural schematic diagram of an illumination light source in another flash module provided by an embodiment of the present application; Figure 12 A schematic diagram of an illumination light source in different states;

[0034] Figure 14 An architecture diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In order to meet different requirements of different photographing requirements for the flashlight, 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.

[0039] 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.

[0040] 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.

[0041] Based on this, the embodiment of the present application provides a flash module and an electronic device to improve the above problems.

[0042] 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.

[0043] In the embodiments of the present application, the terms "first", "second", etc. are only used for convenience of description, 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] 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, however, the dimensions of the layers and regions can be appropriately changed depending on the degree of expansion and / or contraction of the drawings. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated in the drawings, but are to include modifications in shapes of the regions that are normally caused by manufacturing. For example, an etched region illustrated as a rectangle typically will have a curved feature. Thus, the regions illustrated in the drawings are schematic and their shapes are not intended to show the actual shape of the region of a device and are not intended to limit the scope of the exemplary embodiments.

[0050] 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), a netbook, 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.

[0051] Reference is made to Figure 1 , in Figure 1 , a mobile phone is taken as an example to schematically represent an electronic device 1, which includes a camera module 2 and a flash module 3. The camera module 2 is used to implement photographing, video recording, and scanning recognition, and the like, 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 Figure 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.

[0052] Reference is made to Figure 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, only for illumination.

[0053] As Figure 2As shown, the electronic device 1 also includes a controller 4, and the camera module 2 and the flash module 3 are both electrically connected to the controller 4. The controller 4 is used to process the shooting content of the camera module 2 and is also used to control the timing, duration and other related parameters of the flash module 3. The controller 4 can be the SOC (System on Chip, also known as the system on chip) of the electronic device 1, or the ISP (Image Signal Processor) in the electronic device 1; it can also be other control devices provided in the electronic device 1. The electronic device 1 provided in the embodiment of the present application does not limit the specific type of the controller 4.

[0054] 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.

[0055] like Figure 3 As shown, the flash module 3 includes an illumination light source 7, a collimating device 6 and a variable focus lens 5. The illumination light source 7 may include one or more light-emitting bodies 71, and the light-emitting body 71 in the illumination light source 7 is used to form an illumination light beam projected onto the collimating device 6. In this embodiment, the illumination light source 7 adopts a design of a single light-emitting body 71, that is, it includes one light-emitting body 71. The light-emitting body 71 can be a light-emitting diode (LED) or a xenon lamp or other device capable of emitting light. The illumination light beam generated by the light-emitting body 71 in the illumination light source 7 is a divergent light beam, and the divergent illumination light beam is projected onto the collimating device 6.

[0056] The collimating device 6 is used to receive the diverging illumination beam, collimate it, and then project it onto the zoom lens 5. The collimating device 6 may include at least one collimating lens and may also include an optical lens with other functions. The addition of an optical lens with other functions within the collimating device 6 not only enriches the functionality of the collimating device 6 but also improves the beam quality of the illumination beam projected onto the zoom lens 5, thereby enhancing the performance of the flash module 3. The illumination beam emitted from the collimating device 6 and directed onto the zoom lens 5 is a collimated beam.

[0057] The variable focus lens 5 is used to receive the illumination beam emitted from the collimating device 6 and project the illumination beam to a side away from the illumination light source 7 and the collimating device 6, thereby providing fill light or illumination for shooting. In the flash module 3 provided in the embodiment of the present application, the variable focus lens 5 is a lens device with an electrically adjustable focal length, that is, the focal length of the variable focus lens 5 can be changed by electronic control.

[0058] In some embodiments, the variable focus lens 5 may be a liquid crystal lens, such as Figure 4As shown, the liquid crystal lens 5A includes 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 includes 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 arrangement of liquid crystal molecules in 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.

[0059] In other embodiments, the variable focus lens 5 can be an electrowetting liquid lens, such as Figure 5 As shown, the electrowetting liquid lens 5B includes a cavity structure 11, a controlled fluid 15 and a driving electrode; wherein the cavity structure 11 surrounds a fluid cavity 14 containing the controlled fluid 15, and the bottom 12 of the fluid cavity 14 is provided with a hydrophobic layer. 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 in the bottom 12 and the side wall 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 changes in deformation, displacement and other changes, 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 generate different focal lengths, thereby achieving the purpose of electrically controlling the focal length of the electrowetting liquid lens 5B.

[0060] The variable focus lens 5 can also be other types of lenses capable of electrically controlling 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 it exits from the variable focus lens 5 can be changed, thereby changing the size of the illumination light spot formed by the illumination light beam, achieving the purpose of adjusting the size of the illumination light spot generated by the illumination light beam to match different application scenarios.

[0061] An exemplary, Figure 6 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, Figure 7 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; wherein, Figure 7The parts (a), (b) and (c) in the figure are respectively a simulation diagram of the illumination light spot, a light intensity distribution diagram of the illumination light spot and a real shot diagram of the illumination light spot. It should be noted that, since Figure 6 The illumination light spot generated by the flash module 3 shown in the figure has the characteristic that the light intensity distribution is consistent in the orthogonal direction, so Figure 7 The abscissa of the part (b) in the figure can be any direction in the orthogonal direction.

[0062] As shown in Figure 6 and Figure 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 in the minimum state, the energy of the illumination light beam is concentrated in a small area, and the size of the formed illumination light spot is small. This state can be suitable for light compensation for shooting at a long distance and a small field of view (FOV).

[0063] 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 light beam after passing through the variable focus lens 5 is equal to or close to 0. The illumination light beam exiting from the variable focus lens 5 can be considered to be still in a collimated state, and an illumination light spot similar to the shape of the illumination light source 7 is formed, thereby realizing the effect of collimated illumination.

[0064] Still another exemplary, Figure 8 a schematic diagram of the flash module 3 provided by the embodiment of the present application when the variable focus lens 5 is between the maximum focal length and the minimum focal length, Figure 9 a schematic diagram of the illumination light spot of the flash module 3 provided by the embodiment of the present application when the variable focus lens 5 is between the maximum focal length and the minimum focal length; wherein, Figure 9 The parts (a), (b) and (c) in the figure are respectively a simulation diagram of the illumination light spot, a light intensity distribution diagram of the illumination light spot and a real shot diagram of the illumination light spot. It should be noted that, since Figure 8 The illumination light spot generated by the flash module 3 shown in the figure has the characteristic that the light intensity distribution is consistent in the orthogonal direction, so Figure 9 The abscissa of the part (b) in the figure can be any direction in the orthogonal direction.

[0065] As shown in Figure 8 and Figure 9 When the variable focus lens 5 is gradually reduced from the maximum focal length to the minimum focal length, the divergence angle of the collimated illumination light beam after passing through the variable focus lens 5 is gradually expanded, the energy of the illumination light beam is concentrated in a larger area, and the size of the formed illumination light spot is increased. This state can be suitable for light compensation for shooting at a medium distance and a medium field of view.

[0066] Still another exemplary, Figure 10 a schematic diagram of the flash module 3 provided by the embodiment of the present application when the variable focus lens 5 is at the minimum focal length,Figure 11 The schematic diagram of the illumination spot of the flash module 3 provided in the embodiment of the present application when the variable focus lens 5 is at the minimum focal length; wherein, Figure 11 The parts (a), (b) and (c) in FIG. 8 are respectively the simulation diagram of the illumination spot, the light intensity distribution diagram of the illumination spot and the actual photograph of the illumination spot. It should be noted that, since Figure 10 The illumination spot generated by the flash module 3 shown in FIG. 8 has the feature that the light intensity distribution in the orthogonal direction is consistent, therefore Figure 11 The abscissa of the part (b) in FIG. 8 can be any direction in the orthogonal direction.

[0067] As shown in FIGS. 9 and 10, Figure 10 and Figure 11 When the variable focus lens 5 is at the minimum focal length, the divergence angle of the collimated illumination light beam after passing through the variable focus lens 5 is enlarged to the maximum state, the energy distribution of the illumination light beam is in a larger area, and the size of the formed illumination spot is further increased. This state can be suitable for light compensation for close-range and large field-of-view shooting.

[0068] As can be seen from the above, in the flash module 3 provided in the embodiment of the present application, by changing the focal length of the variable focus lens 5, the divergence angle of the illumination light beam when it exits from the variable focus lens 5 can be changed, thereby changing the size of the illumination spot formed by the illumination light beam, and the purpose of adjusting the size of the illumination spot generated by the illumination light beam is achieved to match different application scenarios.

[0069] Please continue to refer to Figure 2 The variable focus lens 5 in the flash module 3 is electrically connected with the corresponding controller 4 in the electronic device 1, and the controller 4 is configured to output an instruction for controlling the focal length of the variable focus lens 5; under the action of different control instructions, the variable focus lens 5 presents 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 to the flash module 3, so that the flash module 3 can generate light compensation consistent with the manual setting of the user.

[0070] It can be seen that, by using the flash module 3 with the above structure, the size of the illumination light spot can be changed by controlling the focal length of the variable focus lens 5, thereby matching different scene requirements. Moreover, 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, thereby enabling the flash module 3 to realize large-range and continuous adjustment of the size of the illumination light spot. In addition, the variable focus lens 5 also has the advantages of simple structure and small occupied volume, which is conducive to integration in portable electronic devices 1 such as mobile phones.

[0071] As can be seen from the above description, the size of the illumination light spot required by the flash module 3 and the adjustment range are related to the shooting range of the camera module 2, that is, 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.

[0072] 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 accordingly, thereby being able to adapt to different application scenarios.

[0073] In some embodiments, the variable focus lens 5 can also be a microlens array, which includes a plurality of microlenses arranged in an array, and the focal length of each microlens can be electrically controlled. For the structure of the microlens and the effect of focal length change 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 microlenses in the microlens array respectively, the adjustment of the illumination light beam at different positions can be realized, thereby making the adjustment of the illumination light spot by the variable focus lens 5 more precise and rich, which is conducive to adapting to more different application scenarios.

[0074] The present 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 Figure 12 the illumination light source 7 is an array light source including a plurality of light emitters 71 arranged in an array, and each light emitter 71 can be individually controlled to be turned on or off. 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 size of the illumination light source 7 can be achieved. As shown in Figure 13As shown in the (a), (b) and (c) parts of FIG. 7, by controlling the working of the light-emitting body 71 at a certain position, different light source shapes such as a circle, a square and a rectangle can be generated. Thus, after the illumination light beam is emitted by the collimating device 6 and the variable-focus lens 5, illumination light spots of different sizes and shapes can be generated, different application scenarios can be adapted to, and the playability of the flash module 3 can be increased.

[0075] For example, the illumination light source 7 can be a display device such as 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, etc. The display device includes a plurality of light-emitting devices arranged in an array, and each light-emitting device can be used as a light-emitting body 71 in the illumination light source 7.

[0076] In this embodiment, the illumination light source 7 is electrically connected to the corresponding controller 4 in the electronic device 1, and the controller 4 is configured to control the opening and closing of the light-emitting body 71 in the plurality of light-emitting bodies 71.

[0077] When the variable-focus lens 5 is a microlens array, the microlenses of the microlens array can correspond to the light-emitting bodies 71 in the array light source one by one, so that the individual control of each light-emitting body 71 is realized, and the adjustment of the illumination light spot by the variable-focus lens 5 is more accurate and rich, which is conducive to adapting to more different application scenarios.

[0078] Figure 14 An architecture diagram of an electronic device 1 provided in this embodiment is shown in FIG. 1. Figure 14 As shown in FIG. 1, 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 loudspeaker 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.

[0079] Among them, the sensor module 180 can include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure 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.

[0080] 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. Among them, different processing units can be independent devices, or can be integrated in one or more processors.

[0081] Among them, 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, and complete the control of fetching instructions and executing instructions.

[0082] The processor 110 can also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory can save instructions or data that the processor 110 has just used or repeatedly uses. If the processor 110 needs to use the instructions or data again, it can directly call from the memory. Avoid repeated access and reduce the waiting time of the processor 110, thereby improving the efficiency of the system.

[0083] 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.

[0084] The I2C interface is a bidirectional synchronous serial bus, including 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, respectively. For example, the processor 110 can be coupled to the touch sensor 180K through an I2C interface, so that the processor 110 and the touch sensor 180K communicate through the I2C bus interface, and realize the touch function of the electronic device 1.

[0085] 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, and realize the 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, and realize the function of answering the phone through the Bluetooth earphone.

[0086] The PCM interface can also be used for audio communication, which samples, quantizes and encodes analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 can be coupled through the PCM bus interface. In some embodiments, the audio module 170 can also deliver audio signals to the wireless communication module 160 through the PCM interface, and realize the function of answering the phone through the Bluetooth earphone. Both the I2S interface and the PCM interface can be used for audio communication.

[0087] 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 to realize the Bluetooth function. In some embodiments, the audio module 170 can transmit audio signals to the wireless communication module 160 through the UART interface to realize the function of playing music through the Bluetooth headset.

[0088] 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 a camera serial interface (CSI), a display serial interface (DSI), etc. In some embodiments, the processor 110 and the camera 193 communicate through the CSI interface to realize the shooting function of the electronic device 1. The processor 110 and the display screen 194 communicate through the DSI interface to realize the display function of the electronic device 1.

[0089] 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.

[0090] The USB interface 130 is an interface that meets 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, or 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 USB3.0, which is used to be compatible with display port (DP) signal transmission and can transmit high-speed audio and video data.

[0091] 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 of 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.

[0092] The charging management module 140 is configured to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some embodiments of wired charging, the charging management module 140 can receive charging input from a wired charger through the USB interface 130. In some embodiments of wireless charging, 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 supply power to the electronic device 1 through the power management module 141 while charging the battery 142. The number of the battery 142 can be one or more.

[0093] The power management module 141 is configured to connect the battery 142 and the charging management module 140 to 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 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be configured to monitor parameters such as battery capacity, battery cycle count, battery health status (leakage, impedance), and the like. 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.

[0094] The wireless communication function of the electronic device 1 can be implemented through the antenna, the mobile communication module 150, the wireless communication module 160, the modem processor, and the baseband processor.

[0095] The antenna is configured to transmit and receive electromagnetic wave signals. The number of the antenna is multiple, and the multiple antennas can work independently or in combination. Each antenna in the electronic device 1 can be configured to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization rate of the antenna. For example, the antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0096] The mobile communication module 150 can provide a solution for wireless communication including 2G / 3G / 4G / 5G, etc. 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 transfer to a modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor, and radiate as electromagnetic waves through the antenna 1. In some embodiments, at least part of the function modules of the mobile communication module 150 can be disposed in the processor 110. In some embodiments, at least part of the function 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.

[0097] The modem processor can include a modulator and a demodulator. The modulator is configured to modulate a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is configured to demodulate a 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 the speaker 170A, the microphone 170B, etc.), or displays an image or a video through the display screen 194. In some embodiments, the modem processor can be a separate device. In 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 function modules.

[0098] 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.

[0099] 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 (TD-SCDMA), 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 beidu navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and / or a satellite based augmentation systems (SBAS).

[0100] 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, which is 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] NPU is a neural-network (NN) computing processor that simulates the structure of biological neural networks, 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.

[0108] 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.

[0109] The internal memory 121 can be used to store computer executable program codes including instructions. The processor 110 executes various functional 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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).

[0121] The distance sensor 180F is used to measure the distance. The electronic device 1 can measure the distance by infrared or laser. In some embodiments, the electronic device 1 can use the distance sensor 180F to measure the distance to achieve fast focusing when shooting a scene.

[0122] The 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 the user holds the electronic device 1 close to the ear to talk, 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 the holster mode and the pocket mode.

[0123] The ambient light sensor 180L is used to sense the 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 shooting. The ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the electronic device 1 is in the pocket to prevent accidental touch.

[0124] The fingerprint sensor 180H is used to collect fingerprints. The electronic device 1 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locking, fingerprint shooting, fingerprint answering calls, etc.

[0125] The temperature sensor 180J is used to detect the temperature. In some embodiments, the electronic device 1 uses the temperature detected by the temperature sensor 180J to perform temperature processing strategies. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold value, the electronic device 1 reduces the performance of the 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.

[0126] Touch sensor 180K, also referred to as "touch panel". Touch sensor 180K can be disposed on display screen 194, and touch sensor 180K and display screen 194 together form a touch screen, also referred to as "touch panel". Touch sensor 180K is configured to detect touch operations applied to or near the touch sensor 180K. The touch sensor 180K can transmit the detected touch operation to the application processor to determine the touch event type. Visual output related to the 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 of display screen 194.

[0127] Bone conduction sensor 180M can obtain vibration signals. In some embodiments, bone conduction sensor 180M can obtain vibration signals of the human body's vocal vibration bone block. Bone conduction sensor 180M can also contact the human body pulse to receive blood pressure pulsation signals. In some embodiments, bone conduction sensor 180M can also be disposed in a headset to form a bone conduction headset. Audio module 170 can analyze voice signals based on the vibration signals of the vocal vibration bone block obtained by the bone conduction sensor 180M to realize voice functions. The application processor can analyze heart rate information based on the blood pressure pulsation signals obtained by the bone conduction sensor 180M to realize heart rate detection functions.

[0128] Keys 190 include power on / off keys, volume keys, and the like. Keys 190 can be mechanical keys. They can also be touch keys. Electronic device 1 can receive key input and generate key signal input related to user settings and function control of electronic device 1.

[0129] Motor 191 can generate vibration prompts. Motor 191 can be used for incoming call vibration prompts and also for touch vibration feedback. For example, touch operations applied to different applications (such as taking pictures, playing audio, etc.) can correspond to different vibration feedback effects. Touch operations applied to different regions of display screen 194 can also correspond to different vibration feedback effects. Different application scenarios (such as time reminders, received messages, alarms, games, etc.) can also correspond to different vibration feedback effects. Touch vibration feedback effects can also be customizable.

[0130] Indicator 192 can be an indicator light, which can be used to indicate charging status, power changes, and also to indicate messages, missed calls, notifications, and the like.

[0131] 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.

[0132] 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.

[0133] The technical effects that the electronic device 1 provided by the embodiments of the present application can achieve are the same as those of the flash module 3 described in any of the above embodiments, and will not be repeated here.

[0134] 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, characterized in that 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 the turning on and off of the light-emitting elements among the plurality of light-emitting elements.

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