Flash lamp and flash lamp illumination method

Abstract

The embodiment of the invention provides a flash lamp, comprising a light source module comprising an LED array for emitting light; an image pickup device; the light source controller is electrically connected with the light source module and used for controlling the light emitting state of the light source module; the main controller is electrically connected with the camera and the light source controller, and the main controller is configured to enable the camera to shoot a first image; analyzing the first image to determine an LED irradiation area; determining a plurality of first LEDs to be started in the LED array according to the LED irradiation area; a light source control signal is sent to the light source controller, so that the light source controller sends out a control current, and the first LEDs are started.

Description

Technical Field

[0001] The invention relates to a flash lamp and a flash lamp lighting method. Background Art

[0002] When using a portable device (such as a mobile phone) to shoot images, a flash is used to increase the ambient brightness. Existing LED flashes are mostly arranged in concentric circles. Although they can take into account a large range of shooting areas, they consume a large number of LEDs and are difficult to fill in specific details for shooting. Summary of the invention

[0003] Some embodiments of the present invention provide a flashlight, comprising: a light source module, including an LED array, for emitting light; a camera; a light source controller, electrically connected to the light source module, for controlling the light-emitting state of the light source module; a main controller, electrically connected to the camera and the light source controller, wherein the main controller is configured to: enable the camera to capture a first image; analyze the first image to determine an LED irradiation area; determine a first plurality of LEDs to be started in the LED array according to the LED irradiation area; and send a light source control signal to the light source controller, so that the light source controller sends a control current to start the first plurality of LEDs.

[0004] In addition, other embodiments of the present invention provide a flash lighting method, including: using a main controller to control a camera to capture a first image; the main controller analyzes the first image to determine an LED illumination area in an LED array of a light source module; the main controller determines a first plurality of LEDs to be activated in the LED array based on the LED illumination area; the main controller sends a light source control signal to the light source controller, so that the light source controller sends a control current, activates the first plurality of LEDs, and captures a second image; the main controller analyzes the second image to confirm that the second image meets the required standards; if the second image meets the required standards, the second image is stored, and if the second image does not meet the required standards, the main controller sends the light source control signal to the light source controller again, so that the light source controller sends the control current, activates the first plurality of LEDs, and captures a third image.

[0005] Based on the above, the flashlight and flashlight lighting method provided by the present invention use elliptical LED flashlights, micro motors and algorithms to achieve the best LED flashlight shooting effect, which can take into account a wide range of shooting areas and only light up the required LEDs. Therefore, it can reduce system energy consumption and perform fill light shooting for specific detail locations, which is suitable for flashlight photography under various ambient brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of a flashlight in a portable device according to an embodiment of the present invention;

[0007] Figure 2 is a schematic diagram of a flashlight according to an embodiment of the present invention;

[0008] Figure 3 is a schematic diagram of a light source module according to an embodiment of the present invention;

[0009] Figure 4A is a schematic diagram of an LED array according to an embodiment of the present invention;

[0010] Figure 4B is a schematic diagram of another LED array according to an embodiment of the present invention;

[0011] Figure 5A is a schematic diagram of a first image according to an embodiment of the present invention;

[0012] Figure 5B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention;

[0013] Fig. 6A is a schematic diagram of a first image according to an embodiment of the present invention;

[0014] Figure 6B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention;

[0015] Fig. 7A is a schematic diagram of a first image according to an embodiment of the present invention;

[0016] Figure 7B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention;

[0017] Fig. 8A is a schematic diagram of a first image and an LED array according to an embodiment of the present invention;

[0018] Figure 8B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention;

[0019] Fig. 9 is a flow chart of a flash lighting method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following examples are listed and described in detail with the accompanying drawings, but the examples provided are not intended to limit the scope of the present invention. In addition, the component sizes in the drawings are drawn for the convenience of explanation and do not represent the actual component size ratios. Moreover, although the words "first", "second", etc. are used in the text to describe different components and / or film layers, these components and / or film layers should not be limited to these terms. Instead, these terms are only used to distinguish one component or film layer from another component or film layer. Therefore, the first component or film layer discussed below can be referred to as the second component or film layer without violating the teachings of the embodiments. For ease of understanding, similar components will be described below with the same symbols.

[0021] Different examples in the description of the embodiments of the present invention may use repeated reference symbols and / or words. These repeated symbols or words are for the purpose of simplicity and clarity, and are not used to limit the relationship between the various embodiments and / or the appearance structures. Furthermore, if the invention content below this specification describes that a first feature is formed on or above a second feature, it means that it includes an embodiment in which the first feature and the second feature are in direct contact, and also includes an embodiment in which an additional feature is formed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. For ease of understanding, similar components will be described below with the same symbols.

[0022] Figure 1 is a schematic diagram of a flashlight in a portable device according to an embodiment of the present invention.

[0023] Please refer to Figure 1 . Figure 1 The appearance of a portable electronic device 1 is shown. In some embodiments, the portable electronic device 1 may be a mobile phone, a tablet computer, or other devices with similar functions. The appearance of the portable electronic device 1 reveals some components of the flash, including a light source module 100 and a camera 200, wherein the camera 200 includes at least one lens 210 for working with the light source module 100 and capturing images.

[0024] The specific structure of the flash lamp is described below.

[0025] Figure 2 is a schematic diagram of a flashlight according to an embodiment of the present invention.

[0026] Please refer to Figure 2 The flash 10 includes a light source module 100 , a camera 200 , a main controller 300 , and a light source controller 400 .

[0027] The light source module 100 includes a light emitting diode (LED) array ( Figure 2 The specific structure of the light source module 100 will be described in detail in Figure 3 In the description.

[0028] The camera 200 is used to capture images. Figure 1 As shown, the camera 200 includes at least one lens 210 , but the type, quantity, size and position of the lens 210 can be adjusted according to actual needs, and the present invention is not limited thereto.

[0029] The light source controller 400 is electrically connected to the light source module 100 to control the light state of the light source module 100. Specifically, the light source controller 400 is electrically connected to each LED in the LED array 132 of the light source module 100 to individually control the start and stop of each LED. In some embodiments, the light source controller 400 can be a circuit, an electronic component, or a processor controlled by software, but the present invention is not limited thereto.

[0030] The main controller 300 is electrically connected to the camera 200 and the light source controller 400. The main controller 300 is used to analyze the image captured by the camera 200 and determine the irradiation area corresponding to the LED array 132 in the light source module 100 and the current passing through the LED array 132. Specifically, the main controller 300 is configured to perform the following functions: enable the camera 200 to capture a first image 600; analyze the first image 600 to determine the LED irradiation area 610; determine the first plurality of LEDs to be activated in the LED array 132 according to the LED irradiation area 610; and send a light source control signal to the light source controller 400 so that the light source controller 400 sends a control current to activate the first plurality of LEDs.

[0031] The functions and effects of the main controller 300 will be described below.

[0032] In some embodiments, the main controller 300 may be a processing circuit or control circuit with a computing function such as a central processing unit (CPU), a microprocessor (MCU) or a field programmable gate array (FPGA), but the present invention is not limited thereto. The main controller 300 may be integrated with the light source controller 400 as a control module, or the main controller 300 may belong to a processing unit of an electronic device integrated with the light source controller 400. In addition, the main controller 300 may also include a memory, and is used to store the images and programs or algorithms mentioned in the various embodiments of the present invention for access and execution by the main controller 300.

[0033] Figure 3 is a schematic diagram of a light source module according to an embodiment of the present invention.

[0034] Please refer to Figure 3 The light source module 100 includes a substrate 130 , an LED array 132 , a housing 140 , and a lens 150 .

[0035] The LED array 132 is disposed on a substrate 130. In some embodiments, the substrate 130 may be a printed circuit board (PCB), a flexible circuit board (FPC), or a substrate of other suitable materials, but the present invention is not limited thereto.

[0036] The LED array 132 includes a plurality of LEDs arranged in a specific manner on the substrate 130. In some embodiments, the LED array includes a combination of one or more monochromatic LEDs or white light LEDs, wherein the monochromatic LEDs include red light LEDs, green light LEDs, and blue light LEDs, but the present invention is not limited thereto.

[0037] Each LED in the LED array 132 can be turned on or off independently, so the light source brightness and lighting method can be optimized according to the shape of the photographed object.

[0038] The housing 140 is disposed on the substrate 130 and surrounds the LED array 132 to form a chamber to protect the LED array 132. In some embodiments, the housing 140 may be made of plastic to reduce the weight of the housing 140 and have sufficient strength to protect the LED array 132.

[0039] The lens 150 is disposed on the housing 140 and covers the LED array 132 to focus and shape the light beams emitted by the LED array 132 to meet lighting requirements. In some embodiments, the lens 150 can be a plastic lens or a Fresnel lens to reduce the weight of the lens and reduce the thickness of the lens to reduce the volume of the light source module 100.

[0040] like Figure 3 As shown, the light source module 100 further includes a rotating platform 120 and a rotating motor 110. Figure 2 As shown, the flash lamp 10 further includes a rotary motor controller 500 .

[0041] like Figure 3 As shown, the rotating platform 120 is disposed at the bottom of the substrate 130 to support the substrate 130. The rotating platform can rotate the substrate 130 in a clockwise direction or a counterclockwise direction to change the lighting direction of the LED array 132.

[0042] The rotary motor 110 is disposed at the bottom of the rotary platform 120, and the rotary platform 120 is driven to rotate by the rotary motor 110. In some embodiments, the rotary motor 110 may be a stepping motor or a micro drive motor to precisely control the rotation angle of the rotary platform 120.

[0043] like Figure 2 As shown, the rotary motor controller 500 is electrically connected to the rotary motor 110 and the main controller 300, and is used to drive the rotary motor 110 to control the direction of the LED array 132. Specifically, the rotary motor controller 500 is used to receive the rotary motor control signal sent by the main controller 300, so that the rotary motor 110 rotates and drives the rotary platform 120, so that the light source module 100 rotates the rotation angle.

[0044] Figure 4A FIG. 4 is a top view of an LED array according to an embodiment of the present invention. Figure 4B FIG. 4 is a top view of another LED array according to an embodiment of the present invention.

[0045] Please refer to Figure 4A .like Figure 4A As shown, the LED array 132 is disposed on the substrate 130 and includes a plurality of LEDs, namely LED 132A-LED 132M.

[0046] The LED array 132 includes a plurality of LEDs, namely, LEDs 132A-LEDs 132M. In other embodiments, other numbers of LEDs may be provided, and the present invention is not limited thereto. The plurality of LEDs, namely, LEDs 132A-LEDs 132M, are distributed within the range formed by the first ellipse E1 and the second ellipse E2.

[0047] like Figure 4A As shown, LED132A, LED132B, LED132D, LED132F, LED132E, LED132G, LED132I, LED132H, LED132J, LED132L, and LED132M are all located in a first ellipse E1. LED132C, LED132B, LED132E, LED132H, LED132D, LED132G, LED132J, LED132F, LED132I, LED132L, and LED132K are all located in a second ellipse E2.

[0048] The major axis of the first ellipse E1 passes through LED 132A, LED 132D, LED 132G, LED 132J, and LED 132M.

[0049] The short axis of the first ellipse E1 passes through LED 132E, LED 132G, and LED 132I.

[0050] The major axis of the second ellipse E2 passes through LED 132C, LED 132E, LED 132G, LED 132I, and LED 132K.

[0051] The short axis of the second ellipse E2 passes through LED 132D, LED 132G, and LED 132J.

[0052] Therefore, the minor axis of the second ellipse E2 is a part of the major axis of the first ellipse E1 , and the minor axis of the first ellipse E1 is a part of the major axis of the second ellipse E2 .

[0053] like Figure 4A As shown, the major axis L1 of the first ellipse E1 passes through the midpoint of the major axis L2 of the second ellipse E2, namely LED132G, and is perpendicular to the major axis L2 of the second ellipse E2, and the size of the first ellipse E1 is the same as that of the second ellipse E2.

[0054] Therefore, the first ellipse E1 and the second ellipse E2 are two ellipses with the same size and shape, and the major axes of the two ellipses are perpendicular to each other.

[0055] By arranging the LEDs of the LED array 132 in the form of two orthogonal ellipses, the arrangement of the LEDs can be made directional and the total number of LEDs can be reduced.

[0056] like Figure 4A As shown, the LEDs in the first ellipse E1 are arranged in a first distribution, and the LEDs in the second ellipse E2 are arranged in a second distribution, and the first distribution and the second distribution have the same shape.

[0057] Specifically, in the first distribution, the LEDs in the first ellipse E1 are mirror-symmetric along the long axis L1 of the first ellipse E1, or mirror-symmetric along the short axis S1 of the first ellipse E1. For example, LED132B, LED132E, and LED132H are mirror-symmetric with LED132F, LED132I, and LED132L along the long axis L1 of the first ellipse E1. In addition, LED132B, LED132A, LED132D, and LED132F are mirror-symmetric with LED132H, LED132M, LED132J, and LED132L along the short axis L2 of the first ellipse E1.

[0058] On the other hand, since the first ellipse E1 and the second ellipse E2 are of the same size and shape, in the second distribution, the LEDs in the second ellipse E2 are mirror-symmetric along the major axis L2 of the second ellipse E2, or mirror-symmetric along the minor axis S2 of the second ellipse E2. For example, LED132B, LED132D, and LED132F are mirror-symmetric with LED132H, LED132J, and LED132L along the major axis L2 of the second ellipse E2. In addition, LED132F, LED132K, LED132I, and LED132L are mirror-symmetric with LED132B, LED132C, LED132E, and LED132H along the minor axis L2 of the second ellipse E2.

[0059] Please refer to Figure 4B Since the LED array 132 is located on the substrate 130, and the substrate 130 is located on the rotating platform 120, the rotation of the rotating platform 120 can drive the rotation of the substrate 130 to change the position of the LED array 132. Figure 4B In Figure 4A The LED array 132 in the embodiment is rotated 45 degrees in a clockwise direction. In other embodiments, the LED array 132 can be rotated at any angle in a clockwise direction or a counterclockwise direction to achieve the best lighting effect.

[0060] According to the image analysis of the main controller 300, the main controller 300 will determine the LED irradiation area and increase the light intensity in the LED irradiation area for shooting. The following example illustrates the lighting method of the flash.

[0061] Figure 5A is a schematic diagram of a first image according to an embodiment of the present invention. Figure 5B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention.

[0062] Please refer to Figure 5A . Figure 5A The screen 10 is a portable electronic device, such as a mobile phone or a tablet computer.

[0063] Before the actual shooting, the main controller 300 starts the camera 200 and starts the photo taking function.

[0064] Next, the main controller 300 controls the camera 200 to capture the first image 600A. This step is only for pre-capturing the image and is only used for subsequent analysis by the main controller 300.

[0065] In some embodiments, the distribution of the LED array 132 in the light source module 100 does not completely correspond to the distribution of the first image 600A. Therefore, in order to obtain the best lighting effect, after the aforementioned step of "the main controller 300 controls the camera 200 to shoot the first image 600A", the main controller 300 calculates the best rotation position of the rotary motor 110 according to the distribution state of the first image 600A, and then the main controller 300 sends a rotary motor control signal to rotate the rotary motor 110 located below the light source module 100, so that the light source module 100 rotates a rotation angle to the best shooting position.

[0066] Next, the main controller 300 determines the LED irradiation area 610A according to the distribution position of the first image 600A on the screen, and the other areas on the screen are non-irradiation areas 620A.

[0067] Next, please refer to Figure 5B The main controller 300 is based on Figure 5A The LED illumination area 610A in the LED array 132 determines the first plurality of LEDs that need to be started in the LED array 132, for example, determines LED132B, LED132D, LED132E, LED132G, LED132I, LED132J, and LED132L that need to be started in the LED array 132.

[0068] Next, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current, starts the first plurality of LEDs, and captures the second image. Figure 5B In the process, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current to start LED132B, LED132D, LED132E, LED132G, LED132I, LED132J, and LED132L to provide sufficient lighting and capture the second image.

[0069] Next, the main controller 300 analyzes the second image to confirm that the second image meets the required standard and stores the second image if the second image meets the required standard.

[0070] On the other hand, if the second image does not meet the required standards, the main controller 300 sends a light source control signal to the light source controller 400 again, causing the light source controller 400 to send a control current, start LED132B, LED132D, LED132E, LED132G, LED132I, LED132J, LED132L, and take a third image.

[0071] Therefore, through the above method, the main controller 300 can determine the LEDs that need to be activated according to the first image 600A, without activating all LEDs, so that more precise lighting can be achieved and the power consumption of the portable electronic device can be reduced.

[0072] Fig. 6A is a schematic diagram of a first image according to an embodiment of the present invention. Figure 6B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention.

[0073] Fig. 6A and Figure 5A The difference is that Fig. 6A In the figure, the shape of the first image 600B roughly occupies the middle area of ​​the screen, so the shapes and ranges of the LED irradiated area 610B and the non-irradiated area 620B are changed accordingly.

[0074] Figure 6B and Figure 5B The difference is that Figure 6B In FIG. 6 , due to the changes in the first image 600B and the LED irradiation area 610B, the number and position of the corresponding LEDs to be activated are also different. Figure 6B In the example, the LEDs to be started are LED132D, LED132E, LED132F, LED132G, LED132H, LED132I, and LED132J.

[0075] Therefore, the main controller 300 can determine the LEDs that need to be activated according to the first image 600B, without activating all the LEDs, thereby achieving more precise lighting and reducing the power consumption of the portable electronic device.

[0076] Fig. 7A is a schematic diagram of a first image according to an embodiment of the present invention. Figure 7B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention.

[0077] Fig. 7A and Figure 5A The difference is that Fig. 7A In the figure, the shape of the first image 600C roughly occupies all areas of the screen except the upper left corner and the lower right corner, so the shapes and ranges of the LED irradiated area 610C and the non-irradiated area 620C are changed accordingly.

[0078] Figure 7B and Figure 5B The difference is that Figure 7B In FIG. 6 , due to the changes in the first image 600C and the LED irradiation area 610C, the number and position of the corresponding LEDs to be activated are also different. Figure 7BIn the example, the LEDs that need to be started are LED132B, LED132C, LED132D, LED132E, LED132F, LED132G, LED132H, LED132I, LED132J, LED132K, and LED132L.

[0079] Therefore, the main controller 300 can determine the LEDs that need to be activated according to the first image 600C, without activating all the LEDs, thereby achieving more precise lighting and reducing the power consumption of the portable electronic device.

[0080] Fig. 8A is a schematic diagram of a first image and an LED array according to an embodiment of the present invention. Figure 8B is a schematic diagram of a first image and an LED array according to an embodiment of the present invention.

[0081] Please refer to Fig. 8A .exist Fig. 8A In the first image 600D, the first image 600D is approximately located in the middle of the LED array. However, the LED array is not arranged at the most appropriate position relative to the first image 600D. At this time, in addition to LED132C and LED132K, a total of 11 LEDs are lit. Therefore, according to the first image, after the main controller 300 calculates the optimal rotation position of the rotary motor 110, the main controller 300 sends a rotary motor control signal to rotate the rotary motor 110, and drives the substrate 130 and the LED array 132 to rotate by a rotation angle to the optimal shooting position through the rotary platform 120. For example, in Figure 8B In the embodiment, the main controller rotates the rotary motor 110 45 degrees counterclockwise, so that the rotary platform 120 and the substrate 130 in the light source module 100 drive the LED array 132 to rotate to achieve the best shooting position. At this time, in addition to LED132A, LED132F, LED132K, and LED132M, a total of 9 LEDs are lit.

[0082] Therefore, the main controller 300 can determine the angle at which the light source module needs to rotate according to the position of the first image 600D to achieve the best shooting position. Figure 8B ), the number of LEDs that need to be lit can be reduced, achieving more precise lighting and reducing power consumption of portable electronic devices.

[0083] Fig. 9 is a flow chart of a flash lighting method according to an embodiment of the present invention.

[0084] Please refer to Fig. 9 The lighting method S100 includes the following steps.

[0085] In step S102, the main controller 300 starts the camera 200 and starts the photo taking function, and then proceeds to step S104.

[0086] In step S104, the main controller 300 controls the camera 200 to capture a first image. Figure 5A The first image 600A, Fig. 6A The first image 600B, Fig. 7A The first image 600C or Fig. 8A The first image 600D is obtained. The process proceeds to step S106.

[0087] In step S106, after the main controller 300 calculates the optimal rotation position of the rotary motor 110 according to the first image, the main controller 300 sends a rotary motor control signal to rotate the rotary motor 110 located below the light source module 100, so that the light source module 100 rotates a rotation angle to the optimal shooting position. Figure 8B In step S108, the light source module 100 is rotated 45 degrees counterclockwise.

[0088] In step S108, the main controller 300 determines the LED irradiation area according to the definition of the first image and the screen occupation position. Specifically, the main controller 300 determines the LED irradiation area according to the distribution position of the first image. For example Figure 5A In the example, the main controller 300 determines the LED irradiation area 610A according to the distribution position of the first image 600A. Fig. 6A In the example, the main controller 300 determines the LED irradiation area 610B according to the distribution position of the first image 600B. Fig. 7A In the embodiment, the main controller 300 determines the LED irradiation area 610C according to the distribution position of the first image 600C. Then, the process proceeds to step S110.

[0089] In step S110, the main controller 300 determines the first plurality of LEDs to be activated in the LED array 132 according to the LED illumination area. Figure 5B In the embodiment, the main controller 300 determines the LEDs 132B, 132D, 132E, 132G, 132I, 132J, and 132L to be activated in the LED array 132 according to the LED irradiation area 610A. Figure 6B In the embodiment, the main controller 300 determines the LEDs 132D, 132E, 132F, 132G, 132H, 132I, and 132J to be activated in the LED array 132 according to the LED irradiation area 610B. Figure 7BIn the process, the main controller 300 determines the LEDs 132B, 132C, 132D, 132E, 132F, 132G, 132H, 132I, 132J, 132K and 132L to be activated in the LED array 132 according to the LED irradiation area 610C, and then proceeds to step S112.

[0090] In step S112, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current, starts the first plurality of LEDs, and captures the second image. Figure 5B In the embodiment, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current to start LED132B, LED132D, LED132E, LED132G, LED132I, LED132J, and LED132L. Or, for example, in Figure 6B In the embodiment, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current to start LED132D, LED132E, LED132F, LED132G, LED132H, LED132I, and LED132J. Or, for example, in Figure 7B In the process, the main controller 300 sends a light source control signal to the light source controller 400, so that the light source controller 400 sends a control current to start LED132B, LED132C, LED132D, LED132E, LED132F, LED132G, LED132H, LED132I, LED132J, LED132K, and LED132L. Then, the process proceeds to step S114.

[0091] In step S114, the main controller 300 analyzes the second image and confirms that the second image meets the required standard. If the second image meets the required standard, the process proceeds to step S116. If the second image does not meet the required standard, the process returns to step S108.

[0092] In step S116 , if the second image meets the required criteria, the second image is stored.

[0093] If in step S114, the second image does not meet the required standard, the process returns to step S108, where the main controller 300 again sends a light source control signal to the light source controller 400, causing the light source controller 400 to send a control current, start the first plurality of LEDs, and capture a third image.

[0094] Based on the above, the flashlight and flashlight lighting method provided by the present invention use elliptical LED flashlights, micro motors and algorithms to achieve the best LED flashlight shooting effect, which can take into account a wide range of shooting areas and only light up the required LEDs. Therefore, it can reduce system energy consumption and perform fill light shooting for specific detail locations, which is suitable for flashlight photography under various ambient brightness.

Claims

1. A flashlight, characterized in that: include: A light source module, including an LED array, for emitting light; Camera; A light source controller, electrically connected to the light source module, for controlling the light emitting state of the light source module; A main controller is electrically connected to the camera and the light source controller, Wherein, the main controller is configured as: enabling the camera to capture a first image; Analyzing the first image to determine an LED irradiation area; Determining a first plurality of LEDs to be activated in the LED array according to the LED illumination area; A light source control signal is sent to the light source controller, so that the light source controller sends a control current to start the first plurality of LEDs.

2. The flash lamp according to claim 1, characterized in that The LED array includes a plurality of LEDs, and the plurality of LEDs are distributed within a range formed by a first ellipse and a second ellipse, wherein the major axis of the first ellipse passes through the midpoint of the major axis of the second ellipse and is perpendicular to the major axis of the second ellipse, and the size of the first ellipse is the same as that of the second ellipse.

3. The flash lamp according to claim 2, characterized in that The LEDs in the first ellipse are arranged in a first distribution, and the LEDs in the second ellipse are arranged in a second distribution, and the first distribution and the second distribution have the same shape.

4. The flash lamp according to claim 2, characterized in that The LEDs in the first ellipse are mirror-symmetrical along the major axis of the first ellipse, or mirror-symmetrical along the minor axis of the first ellipse.

5. The flash lamp according to claim 2, characterized in that: The LEDs in the second ellipse are mirror-symmetrical along the major axis of the second ellipse, or mirror-symmetrical along the minor axis of the second ellipse.

6. The flash lamp according to claim 1, characterized in that in, In the step of analyzing the first image to determine the LED irradiation area, the main controller determines the LED irradiation area according to the distribution position of the first image.

7. The flash lamp according to claim 1, characterized in that The light source module further comprises: A substrate, on which the LED array is arranged; A housing, disposed on the substrate and surrounding the LED array; The lens is disposed on the housing and covers the LED array.

8. The flash lamp according to claim 7, characterized in that Also includes: A rotating platform is arranged at the bottom of the substrate; A rotary motor, disposed at the bottom of the rotary platform; a rotary motor controller, electrically connected to the rotary motor and the main controller, Before analyzing the first image to determine the LED irradiation area, the main controller is configured as follows: analyzing the first image to determine a rotation angle of the light source module; The main controller sends a rotation motor control signal to make the rotation motor rotate and drive the rotation platform to make the light source module rotate by the rotation angle.

9. A flashlight lighting method, characterized in that: include: Using the main controller to control the camera to capture a first image; The main controller analyzes the first image to determine an LED illumination area in an LED array of a light source module; The main controller determines the first plurality of LEDs to be activated in the LED array according to the LED irradiation area; The main controller sends a light source control signal to the light source controller, so that the light source controller sends a control current, starts the first plurality of LEDs, and captures a second image; The main controller analyzes the second image to confirm that the second image meets the required standards; wherein if the second image meets the required criteria, storing the second image, If the second image does not meet the required standard, the main controller sends the light source control signal to the light source controller again, so that the light source controller sends the control current, starts the first plurality of LEDs, and captures the third image.

10. The flashlight illumination method according to claim 9, characterized in that: In the step of the main controller analyzing the first image to determine the LED irradiation area, the main controller determines the LED irradiation area according to the distribution position of the first image.

11. The flashlight illumination method according to claim 9, characterized in that: Before the main controller analyzes the first image to determine the LED irradiation area, the method further includes: analyzing the first image to determine a rotation angle of the light source module; The main controller sends a rotation motor control signal to rotate the rotation motor located below the light source module, so that the light source module rotates by the rotation angle.

Images