Flash module and electronic device

Abstract

The application discloses a flash module and an electronic device, and belongs to the technical field of electronic devices. The flash module comprises a light source, a light guide pipe, a bearing substrate and a lens. The light guide pipe is a through tubular structure and comprises a light inlet and a light outlet. The bearing substrate is used for bearing the light source and the light guide pipe. The light source is arranged on one side close to the light inlet, and the lens is arranged on one side close to the light outlet. The light source is used for emitting light towards the light inlet after being electrified. The light is emitted from the light outlet after multiple reflections in the light guide pipe and is emitted outwards through the lens.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, specifically relating to a flash module and an electronic device. Background Technology

[0002] Currently, commonly used focal lengths for portrait photography on electronic devices include 24mm, 35mm, 50mm, 85mm, and 135mm. To cover portraits across multiple focal lengths, existing electronic devices employ zoom flashes, with technical solutions including patterned designs and motor-driven solutions. However, patterned designs can only achieve stepped zoom, not stepless zoom. While motor-driven solutions can achieve stepless zoom, they require a raised platform for the LED chips, which affects LED heat dissipation, resulting in poorer illumination. Summary of the Invention

[0003] The purpose of this application is to provide a flash module and electronic device that can improve the effective illumination of the flash in working condition while achieving stepless zoom.

[0004] In a first aspect, embodiments of this application provide a flash module, including: Light source, light guide tube, substrate, lens; The light guide tube is a through-tube structure, including a light inlet and a light outlet; The carrier substrate is used to support the light source and the light guide tube. The light source is disposed on the side near the light inlet, and the lens is disposed on the side near the light outlet. The light source is used to emit light towards the light inlet after being powered on. The light is reflected multiple times inside the light guide tube and then emitted from the light outlet, and is emitted outward through the lens.

[0005] Secondly, embodiments of this application provide an electronic device, including the flash module as described in the first aspect.

[0006] In this embodiment, the light guide tube of the flash module is a through-tube structure. The light source is located on the side near the light inlet of the light guide tube, and the lens of the flash module is located on the side near the light outlet of the light guide tube. After the flash is powered on, it emits light. The light enters the interior of the light guide tube from the light inlet. After multiple reflections inside the light guide tube, the light exits the light outlet of the light guide tube and directly enters the lens. The light is then emitted outward through the lens. This flash module can not only achieve stepless zoom, but also achieve light guiding and elevation functions through the light guide tube, eliminating the need for an additional elevation plate and improving the effective illumination of the flash in working condition. Attached Figure Description

[0007] Figure 1 This is a cross-sectional view of the flash module in the embodiments of this application; Figure 2 This is an exploded view of the flash module in the embodiments of this application; Figure 3 This is a schematic diagram of the light guide tube in the embodiments of this application; Figure 4 This is a schematic diagram of the color temperature and the number of light-emitting units in the embodiments of this application; Figure 5 This is a schematic diagram of the light guide tube in the embodiments of this application; Figure 6 This is a schematic diagram of the light guide tube in the embodiments of this application; Figure 7 This is a schematic diagram showing the amount of movement and the launch angle in the embodiments of this application; Figure 8 This is a schematic diagram illustrating the relationship between distance and movement in an embodiment of this application; Explanation of reference numerals in the attached figures: 1. Light source; 11. Light-emitting unit; 2. Light guide tube; 21. Light inlet; 22. Light outlet; 23. First tube segment; 24. Second tube segment; 25. Third tube segment; 26. Fourth tube segment; 27. Fifth tube segment; 3. Support substrate; 4. Lens; 5. Drive motor; 6. Drive chip; 7. Lens assembly adhesive. Detailed Implementation

[0008] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0009] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0010] In portrait photography, flash is a core tool for enhancing image quality, expanding shooting scenarios, and precisely controlling light. Its benefits are reflected in multiple dimensions, including image quality optimization, atmosphere creation, and scene adaptation, and can be specifically divided into the following categories: 1. Image quality: Solve the problem of insufficient light, improve the success rate of photos and detail; 2. Light control aspect: Shaping three-dimensional contours and optimizing portrait texture; 3. Scene adaptation: Breaking through the limitations of natural light and expanding the boundaries of creation.

[0011] For electronic photography, commonly used focal lengths for portrait photography include 24mm, 35mm, 50mm, 85mm, and 135mm. To cover portraits at multiple focal lengths, existing electronic devices use zoom flashes. One technical solution is a textured design, where one light-emitting diode (LED) uses a diffusion pattern, and another uses a converging pattern. This achieves coverage from wide-angle to telephoto. A further advanced approach is to use three LEDs, with two using a converging pattern. However, because the textured design uses a discrete, fixed structure, it can only achieve stepped zoom, not stepless zoom. Furthermore, to accommodate multiple portrait focal lengths, switching to longer focal lengths like 85mm and 135mm results in a reduced effective aperture, decreased diffraction efficiency, and natural light dilution, leading to significantly insufficient illumination.

[0012] Zoom flashes can also use a motor-driven approach to achieve stepless zoom, where the motor moves the Fresnel lens up and down to cover the emitted light angle from wide-angle to telephoto. However, conventional motor-driven zoom flashes use a single-lamp design, and due to the distance requirements between the LED and the Fresnel lens, a support plate is needed for the LED. However, the support plate affects the heat dissipation of the LED, resulting in poor illumination.

[0013] Therefore, this application provides a flash module that can not only achieve stepless zoom, but also achieve light guiding and elevation functions through a light guide tube, eliminating the need for an additional elevation plate and improving the effective illumination of the flash in working condition.

[0014] The flash module provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0015] like Figures 1 to 3 As shown, this application embodiment provides a flash module, including: 1. Light source; 2. Light guide tube; 3. Supporting substrate; 4. Lens; The light guide tube 2 is a through-tube structure, including a light inlet 21 and a light outlet 22; The carrier substrate 3 is used to support the light source 1 and the light guide tube 2. The light source 1 is disposed on the side close to the light inlet 21, and the lens 4 is disposed on the side close to the light outlet 22. The light source 1 is used to emit light towards the light inlet 21 after being powered on. The light is reflected multiple times inside the light guide tube 2 and then emitted from the light outlet 22, and emitted outward through the lens 4.

[0016] Specifically, the flash module includes, but is not limited to: light source 1, light guide tube 2, carrier substrate 3, and lens 4. The light source 1 and light guide tube 2 are disposed on the carrier substrate 3, and the light source 1 and the carrier substrate 3 are electrically connected to each other so as to supply power to the light source 1 through the carrier substrate 3.

[0017] The light guide tube 2 is a through-tube structure with two openings, one of which is a light inlet 21 and the other is a light outlet 22. The outer surface of the light guide tube 2 is coated with a metal coating and a dielectric protective layer. Preferably, the metal coating is aluminum.

[0018] Light source 1 is optically coupled to one side of the light inlet 21 of light guide tube 2, and lens 4 is optically coupled to one side of the light outlet 22 of light guide tube 2. Thus, when light source 1 is powered on, it emits light, which enters the light guide tube 2 through the light inlet 21. After multiple reflections inside the light guide tube 2, the light exits through the light outlet 22 and directly enters the lens 4, from which it exits outwards. In one embodiment, the carrier substrate 3 is specifically a printed circuit board (PCB).

[0019] In one embodiment, the light source 1 is an LED light source.

[0020] In one embodiment, lens 4 is a Fresnel lens.

[0021] This flash module not only enables stepless zoom, but also achieves light guiding and elevation functions through the light guide tube 2, eliminating the need for an additional elevation plate and improving the effective illumination of the flash during operation.

[0022] In the above embodiment, light is emitted after the power supply 1 is powered on. The light is deflected and guided by the light guide tube 2 to achieve the result of outputting in the vertical direction. The light guide tube 2 can realize the functions of light guiding and raising, eliminating the need to add a raising plate, and can improve the effective illumination of the flash in the working state.

[0023] like Figure 2As shown, in some optional embodiments of this application, the light source 1 includes at least two light-emitting units 11 arranged in an array or in a linear arrangement; Each of the light-emitting units 11 is used to emit light toward the light inlet 21 after being powered on. The light from each of the light-emitting units 11 is converged after being reflected multiple times inside the light guide tube 2 and emitted at the light outlet 22.

[0024] Specifically, the light source 1 includes at least two light-emitting units 11, which are arranged in an array or linearly. Each light-emitting unit 11 is an LED bead. After the light source 1 is powered on, each light-emitting unit 11 emits light. Each light-emitting unit 11 emits light through the light inlet 21 of the light guide tube 2. The inner wall of the light guide tube 2 is a reflective surface. After multiple reflections through the inner wall of the light guide tube 2, the light from each light-emitting unit 11 gradually converges towards the light outlet 22 of the light guide tube 2. Finally, the light from at least two light-emitting units 11 converges and exits from the light outlet 22, directly incident on the lens 4. After refraction or collimation by the lens 4, a light spot is emitted outward according to the exit angle.

[0025] It should be noted that if the volume of the light source 1 increases, the area of ​​the light inlet 21 of the light guide tube 2 needs to be increased, which is not conducive to the miniaturization of the light guide tube 2. Therefore, arranging adjacent light-emitting units 11 in an array or linear arrangement can reduce the volume of the light guide tube 2. For example, if the light source 1 includes three light-emitting units 11, arranging the three light-emitting units 11 at a certain angle in a triangular distribution will increase the volume of the light source 1, thereby increasing the area of ​​the light inlet 21 of the light guide tube 2. Therefore, the area of ​​the LED lamp group increases, and the light inlet of the light guide tube 2 needs to be increased, which is not conducive to miniaturization.

[0026] In the above embodiment, the light source 1 includes multiple LED beads, which are connected to the light inlet 21 of the light guide tube 2 by optical coupling. Then, the light guide tube 2 is deflected and guided to achieve the purpose of outputting in the vertical direction. Thus, the light guide tube 2 realizes the functions of guiding light and raising the light.

[0027] In one embodiment, the number of light-emitting units 11 in the light source 1 is 2 to 4.

[0028] For flash modules, when shooting portraits, brightness is the first priority, and color temperature is the second priority. The number of light-emitting units 11 can be selected based on the color temperature of light source 1: 4500K is a neutral color temperature, 2700K is a warm light color temperature, and 6500K is a cool light color temperature. Example: Figure 4As shown, if the light source 1 is a monochromatic light source, the number of light-emitting units 11 in the light source 1 can be set to three, such as: the color temperature of all three light-emitting units 11 is 2700K, or the color temperature of all three light-emitting units 11 is 4500K, or the color temperature of all three light-emitting units 11 is 6500K. Among them, three light-emitting units 11 with the same color temperature have higher brightness than two light-emitting units 11 with the same color temperature, and three light-emitting units 11 with the same color temperature can reduce temperature rise and power consumption compared to four light-emitting units 11 with the same color temperature.

[0029] If light source 1 is a dual-color temperature light source, the number of light-emitting units 11 in light source 1 can be set to four, such as: two of the light-emitting units 11 have a color temperature of 2700K, and the other two light-emitting units 11 have a color temperature of 6500K, so that brightness performance can be balanced under multiple color temperatures.

[0030] If the light source 1 is a tri-color temperature light source, the number of light-emitting units 11 in the light source 1 can be set to three, that is, the color temperature of one light-emitting unit 11 is 2700K, the color temperature of one light-emitting unit 11 is 4500K, and the color temperature of one light-emitting unit 11 is 6500K, which can achieve better color temperature coverage.

[0031] In the above example, the dual-color-temperature light source 1 has two light-emitting units 11 with a warm light color temperature of 2700K and two other light-emitting units 11 with a cool light color temperature of 6500K, thus achieving stepless adjustment of the color temperature from 2700K to 6500K. The tri-color-temperature light source 1 has one light-emitting unit 11 with a warm light color temperature of 2700K, one light-emitting unit 11 with a neutral color temperature of 4500K, and one light-emitting unit 11 with a cool light color temperature of 6500K, thus also achieving stepless adjustment of the color temperature from 2700K to 6500K.

[0032] In some optional embodiments of this application, the area of ​​the light outlet 22 is greater than the area of ​​one of the light-emitting units 11, but less than twice the area of ​​the light-emitting unit 11.

[0033] Specifically, such as Figure 4 As shown, if the length of a light-emitting unit 11 is a and the width is b, then the area of ​​a light-emitting unit 11 is the product of a and b, i.e., a*b. Since the light source 1 includes at least two light-emitting units 11, in order to ensure that the light from at least two light-emitting units 11 converges and is emitted after being reflected by the light guide tube 2, the area of ​​the light outlet 22 is set to be smaller than the area of ​​the light inlet 21 to ensure light convergence, and the area of ​​the light outlet 22 is larger than the area of ​​one light-emitting unit 11 to ensure the emission of converged light.

[0034] Preferably, the area of ​​the light outlet 22 is less than 2*a*b and greater than a*b, that is, the area of ​​the light outlet 22 is set within the range of (a*b, 2*a*b).

[0035] In some optional embodiments of this application, the spacing between two adjacent light-emitting units 11 is greater than 0.1 mm and less than 0.4 mm.

[0036] Specifically, such as Figure 4 As shown, the lateral spacing c between two adjacent light-emitting units 11 in the light source 1 is in the range of 0.1mm < c < 0.4mm; the longitudinal spacing d between two adjacent light-emitting units 11 in the light source 1 is in the range of 0.1mm < c < 0.4mm. This ensures the safe distance when the light-emitting units 11 are mounted and meets the heat dissipation requirements. Increasing the spacing between two adjacent light-emitting units 11 is beneficial for heat dissipation but will increase the volume of the light source 1. Decreasing the spacing between two adjacent light-emitting units 11 is beneficial for reducing the volume of the light source 1 but is not beneficial for heat dissipation.

[0037] In one embodiment, c and d are preferably 0.2 mm.

[0038] In some optional embodiments of this application, the light guide tube 2 includes a first tube segment 23, a second tube segment 24, a third tube segment 25, a fourth tube segment 26, and a fifth tube segment 27 arranged sequentially along the light propagation direction, and adjacent tube segments are interconnected. Wherein, the first pipe segment 23 and the third pipe segment 25 are spatially perpendicular to each other, and the third pipe segment 25 and the fifth pipe segment 27 are spatially perpendicular to each other; The first pipe segment 23 and the second pipe segment 24 form a first deflection angle, and the third pipe segment 25 and the fourth pipe segment 26 form a second deflection angle. Both the first deflection angle and the second deflection angle are acute angles.

[0039] Specifically, such as Figure 3 , Figure 5 , Figure 6 As shown, the light guide 2 can be a one-piece structure or a multi-segment structure. The light guide 2 includes a first segment 23, a second segment 24, a third segment 25, a fourth segment 26, and a fifth segment 27. The light source 1 is located on the side of the first segment 23. The side of the first segment 23 closest to the light source 1 is designated as the light inlet 21, and the side of the fifth segment 27 closest to the lens 4 is designated as the light outlet 22. When the light source 1 is powered on, it emits light. This light first enters the first segment 23 through the light inlet 21, then through the second segment 24, then through the third segment 25, then through the fourth segment 26, and finally exits the light guide 2 from the light outlet 22 through the fifth segment 27.

[0040] To achieve the light guiding and elevation functions of the light guide tube 2, the first tube segment 23 and the third tube segment 25 are spatially perpendicular, meaning the central axis of the first tube segment 23 is perpendicular to the central axis of the third tube segment 25; similarly, the third tube segment 25 and the fifth tube segment 27 are spatially perpendicular, meaning the central axis of the third tube segment 25 is perpendicular to the central axis of the fifth tube segment 27. Furthermore, a first deflection angle A is set between the first tube segment 23 and the second tube segment 24, meaning the angle between the extensions of the central axes of the first tube segment 23 and the second tube segment 24 is the first deflection angle A. Figure 5 As shown. Furthermore, a second deflection angle B is set between the third pipe segment 25 and the fourth pipe segment 26, that is, the angle between the extension of the central axis of the third pipe segment 25 and the central axis of the fourth pipe segment 26 is the second deflection angle B, as shown. Figure 6 As shown in the figure. Both the first deflection angle A and the second deflection angle B are acute angles, meaning they are both less than 90 degrees and greater than 0 degrees.

[0041] In some optional embodiments of this application, the angle range of the first deflection angle is: greater than or equal to 30 degrees and less than or equal to 60 degrees; The second deflection angle has an angle range of 30 degrees or more and 60 degrees or less.

[0042] Specifically, the range of the first deflection angle A between the first tube segment 23 and the second tube segment 24 is set to [30°~60°], and the range of the second deflection angle B between the third tube segment 25 and the fourth tube segment 26 is set to [30°~60°], so that the light can be deflected and guided to be output in the vertical direction, thereby realizing the functions of light guiding and elevation.

[0043] In some optional embodiments of this application, the fifth pipe segment 27 is a variable cross-section pipe, and the cross-sectional dimensions of the fifth pipe segment 27 gradually decrease from the direction close to the fourth pipe segment 26 toward the direction away from the fourth pipe segment 26.

[0044] Specifically, the fifth segment 27 is a rectangular variable cross-section tube, and the cross-sectional dimensions of the fifth segment 27 gradually decrease from the end closest to the fourth segment 26 towards the direction away from the fourth segment 26 (i.e., the light outlet 22). In other words, the cross-section begins at the end closest to the fourth segment 26 and moves away from it, with the cross-sectional dimensions decreasing the further away from the fourth segment 26. In other words, the fifth segment 27 of the light guide tube 2 is a straight-line hollow pyramid with four planar sidewalls that are inclined relative to the tube's axis. This structure of the fifth segment 27 allows for total internal reflection of light, thereby achieving efficient convergence of multiple light rays.

[0045] In some optional embodiments of this application, the angle between each sidewall of the fifth pipe segment 27 and the axis of the fifth pipe segment 27 is in the range of: greater than 0 degrees and less than or equal to 10 degrees.

[0046] Specifically, since the fifth segment 27 of the light guide tube 2 is a straight hollow pyramid with four flat sidewalls that are inclined relative to the tube axis, the angle C (i.e., the inclination angle C) between each sidewall of the fifth segment 27 and the axis of the fifth segment 27 is in the range of (0, 10]. Figure 6 As shown, the size of the light outlet 22 is limited while ensuring efficient convergence of multiple light rays.

[0047] In some optional embodiments of this application, the flash module further includes: a drive motor 5 and a drive chip 6; The driving chip 6 is disposed on the carrier substrate 3 and electrically connected to the driving motor 5. The driving chip 6 is used to drive the driving motor 5 to move the lens 4 after being powered on, so as to change the distance between the lens 4 and the light outlet 22 of the light guide tube 2.

[0048] Specifically, such as Figure 2 As shown, the flash module may further include a driver chip 6 mounted on the carrier substrate 3 and a drive motor 5 electrically connected to the driver chip 6. The lens 4 is connected to the drive motor 5 via lens assembly adhesive 7. After the flash module is powered on, the driver chip 6 controls the movement of the drive motor 5. The movement of the drive motor 5 causes the lens 4 to move, thereby changing the distance between the lens 4 and the light outlet 22 of the light guide tube 2, thus achieving the zoom function.

[0049] like Figure 7 As shown, the light emission angle of the flash module, i.e., the field of view (FOV), is measured for every 0.1mm movement of the drive motor 5 on the production line. Then, the above data is fitted to establish the first mapping relationship between the movement of the drive motor 5 and the light emission angle of the flash module, as shown in Table 1: Table 1

[0050] Because the emission angle may have errors, the emission angle of the flash module is 28°~90°, and the movement of the drive motor 5 is 0mm~0.6mm. When the drive motor 5 is in the default position, i.e., the movement is 0, the emission angle of the flash module is 86.7°. If the movement of the drive motor 5 is 0.6mm, the corresponding emission angle of the flash module is 29.5°. That is, the greater the movement, the greater the distance between the light outlet 22 and the lens 4. As the movement increases, the emission angle decreases, and the brightness after emission increases. The stepless zoom range of the camera module that works with the flash module covers 24mm~85mm. When the focal length of the camera module is 85mm, the corresponding emission angle of the flash module is 29.5°, and when the focal length of the camera module is 24mm, the corresponding emission angle of the flash module is 86.7°.

[0051] The first mapping relationship between the movement of the aforementioned drive motor and the light emission angle of the flash module is burned into the electronic device to which the flash module belongs.

[0052] like Figure 8 As shown, when the shooting distance between the electronic device to which the flash module belongs and the subject is less than 0.5m, the drive motor 5 remains in its default state, i.e., the movement is 0. When the shooting distance is greater than or equal to 3.5m, the drive motor 5 moves to its highest position, i.e., the movement is 0.6mm. A second mapping relationship is established between the shooting distance and the movement of the drive motor 5, as shown in Table 2: Table 2

[0053] The second mapping relationship between the shooting distance and the amount of movement of the drive motor is burned into the electronic device to which the flash module belongs.

[0054] After the portrait flash mode is turned on, when the shooting distance is obtained by the focus sensor, the movement of the corresponding drive motor can be determined by the second mapping relationship, and the emission angle can be determined by the first mapping relationship. The movement of the drive motor can be quickly adjusted by the drive chip, thereby quickly adjusting the emission angle and achieving more efficient fill light.

[0055] This application also provides an electronic device, including a flash module as described in any of the above embodiments.

[0056] In this embodiment, an electronic device having the flash module as described above emits light after the flash module is powered on. The light enters the interior of the light guide tube from the light inlet, undergoes multiple reflections inside the light guide tube, converges at the light outlet of the light guide tube, and is emitted directly into the lens. The light is then emitted outward through the lens. This flash module not only achieves stepless zoom, but also realizes light guiding and elevation functions through the light guide tube, eliminating the need for an additional elevation plate and improving the effective illumination of the flash in working condition.

[0057] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0058] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0059] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A flash module, characterized in that, include: Light source (1), light guide tube (2), carrier substrate (3), lens (4); The light guide tube (2) is a through-tube structure, including a light inlet (21) and a light outlet (22). The carrier substrate (3) is used to carry the light source (1) and the light guide tube (2). The light source (1) is disposed on the side near the light inlet (21), and the lens (4) is disposed on the side near the light outlet (22). The light source (1) is used to emit light towards the light inlet (21) after being powered on. The light is reflected multiple times inside the light guide tube (2) and then emitted from the light outlet (22) and outward through the lens (4).

2. The flash module according to claim 1, characterized in that, The light source (1) includes at least two light-emitting units (11) arranged in an array or in a linear arrangement. Each of the light-emitting units (11) is used to emit light toward the light inlet (21) after being powered on. The light from each of the light-emitting units (11) is converged after being reflected multiple times inside the light guide tube (2) and emitted at the light outlet (22).

3. The flash module according to claim 2, characterized in that, The area of ​​the light outlet (22) is greater than the area of ​​one of the light-emitting units (11) and less than twice the area of ​​the light-emitting unit (11).

4. The flash module according to claim 2, characterized in that, The spacing between two adjacent light-emitting units (11) is greater than 0.1 mm and less than 0.4 mm.

5. The flash module according to claim 1, characterized in that, The light guide tube (2) includes a first tube segment (23), a second tube segment (24), a third tube segment (25), a fourth tube segment (26), and a fifth tube segment (27) arranged sequentially along the direction of light propagation, and adjacent tube segments are interconnected. Wherein, the first pipe segment (23) and the third pipe segment (25) are perpendicular to each other in space, and the third pipe segment (25) and the fifth pipe segment (27) are perpendicular to each other in space; The first pipe segment (23) and the second pipe segment (24) form a first deflection angle, and the third pipe segment (25) and the fourth pipe segment (26) form a second deflection angle. Both the first deflection angle and the second deflection angle are acute angles.

6. The flash module according to claim 5, characterized in that, The first deflection angle is within the range of 30 degrees or more and 60 degrees or less. The second deflection angle has an angle range of 30 degrees or more and 60 degrees or less.

7. The flash module according to claim 5, characterized in that, The fifth pipe segment (27) is a variable cross-section pipe, and the cross-sectional dimensions of the fifth pipe segment (27) gradually decrease from the direction close to the fourth pipe segment (26) toward the direction away from the fourth pipe segment (26).

8. The flash module according to claim 5 or 7, characterized in that, The angle between each side wall of the fifth pipe segment (27) and the axis of the fifth pipe segment (27) is greater than 0 degrees and less than or equal to 10 degrees.

9. The flash module according to claim 1, characterized in that, Also includes: Drive motor (5) and drive chip (6); The driving chip (6) is disposed on the carrier substrate (3) and electrically connected to the driving motor (5). The driving chip (6) is used to drive the driving motor (5) to move the lens (4) after being powered on, so as to change the distance between the lens (4) and the light outlet (22) of the light guide tube (2).

10. An electronic device, characterized in that, Includes the flash module as described in any one of claims 1 to 9.

Images