Light source device

Abstract

The application relates to a light source device, comprising a support, a lens, a plurality of first lamp beads and a plurality of second lamp beads, the plurality of first lamp beads and the plurality of second lamp beads are arranged on the support, the first lamp beads and the second lamp beads are alternately arranged, the first lamp beads and the second lamp beads each comprise a first light emitting chip, a second light emitting chip and a third light emitting chip, the centers of the first lamp beads and the second lamp beads in the orthographic projection of the support are located on the same center line, the light emitting chips emitting the same color light in the first lamp beads and the second lamp beads are arranged on different sides of the center line, and the first light emitting chip, the second light emitting chip and the third light emitting chip are used for emitting light of different colors; the lens is arranged on the light emitting side of each first lamp bead and each second lamp bead and is arranged in a spaced mode with each first lamp bead and each second lamp bead. The light source device in the application can improve the light emitting consistency and directivity of the light source device.

Description

Technical Field

[0001] This application relates to the field of light source technology, and in particular to light source devices. Background Technology

[0002] In the field of light source technology, light sources typically employ multiple light-emitting chips of different colors to achieve colorful light output. These chips can emit primary colors of light, such as red, green, and blue, and various desired colors can be produced by mixing these primary colors. However, in practical applications, a series of problems arise due to improper arrangement of the light-emitting chips.

[0003] Specifically, when different colored LEDs light up, the focal point of each color changes after the light passes through the focusing lens. For example, the focal point of light emitted from a red LED might be shifted to one side after passing through the focusing lens, while the focal point of light emitted from a blue LED might be shifted to the other side after passing through the same lens. This inconsistency in the focal point makes it difficult to ensure the overall light output of the light source is consistent. Utility Model Content

[0004] Therefore, it is necessary to provide a light source device that can improve the uniformity of light output from the light source, addressing the aforementioned technical problems.

[0005] In a first aspect, this application provides a light source device, comprising:

[0006] support;

[0007] Multiple first LED beads and multiple second LED beads are disposed on the bracket. The first LED beads and the second LED beads are arranged alternately. Each of the first LED beads and the second LED beads includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip. The centers of the orthographic projections of the first LED beads and the second LED beads on the bracket are located on the same center line. The light-emitting chips of the first LED beads and the second LED beads that emit light of the same color are disposed on different sides of the center line. The first light-emitting chip, the second light-emitting chip, and the third light-emitting chip are used to emit light of different colors.

[0008] Lenses are disposed on the light-emitting side of each of the first and second lamp beads, and are spaced apart from each of the first and second lamp beads.

[0009] In one embodiment, in the same first LED bead and / or the same second LED bead, the first light-emitting chip is disposed along a first direction, and the second light-emitting chip and the third light-emitting chip are disposed along a second direction. The center of the first light-emitting chip is offset from the center of the second light-emitting chip and the center of the third light-emitting chip in a third direction, respectively. The first direction is parallel to the second direction, and the third direction is perpendicular to the first direction and the second direction, respectively.

[0010] In one embodiment, both the first LED and the second LED include:

[0011] An encapsulating resin is used to cover the orthographic projections of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip onto the bracket.

[0012] In one embodiment, it further includes:

[0013] A driving circuit is connected to each of the first LED beads and each of the second LED beads, and is used to drive each of the first LED beads and each of the second LED beads to emit light.

[0014] In one embodiment, it further includes:

[0015] A driver board is used to support the drive circuit and the bracket.

[0016] In one embodiment, it further includes:

[0017] The fixed structure includes multiple fixing slots for fixing the drive board, so as to adjust the distance between the first and second LEDs in the drive board and the lens by setting at least one of the drive board in different fixing slots.

[0018] In one embodiment, it further includes:

[0019] A color-absorbing plate is disposed on the periphery of the light transmission path between the driving plate and the lens, and is used to absorb at least a portion of the light emitted by the target LED; the target LED is the first LED and / or the second LED disposed on the edge of the driving plate.

[0020] In one embodiment, the driving circuit includes:

[0021] The first driving sub-circuit is connected to each of the first light-emitting chips and is used to connect to an external controller.

[0022] The second driving sub-circuit is connected to each of the second light-emitting chips and is used to connect to the external controller;

[0023] The third driving sub-circuit is connected to each of the third light-emitting chips and is used to connect to the external controller;

[0024] The first driving sub-circuit, the second driving sub-circuit, and the third driving sub-circuit are respectively used to adjust the driving parameters output to the corresponding light-emitting chip under the control of the external controller, so as to adjust the light-emitting brightness of the corresponding light-emitting chip.

[0025] In one embodiment, a plurality of first LEDs and a plurality of second LEDs are arranged alternately, and the centers of the plurality of first LEDs and the plurality of second LEDs are located on the same straight line; or,

[0026] The plurality of first LED beads and the plurality of second LED beads are arranged alternately, and at least a portion of the line connecting the centers of the plurality of first LED beads and the centers of the plurality of second LED beads forms a closed curve.

[0027] In one embodiment, it further includes:

[0028] A cooling fan is used to generate airflow to remove the heat generated by the light source device; and / or,

[0029] Heat sink, used to provide heat dissipation area to absorb and conduct heat generated by the light source device;

[0030] In the case where the light source device includes the cooling fan and the heat sink, the heat sink is also used to conduct the absorbed heat to the cooling fan.

[0031] The aforementioned light source device includes a bracket, a lens, multiple first LEDs, and multiple second LEDs. The first and second LEDs are mounted on the bracket, arranged alternately. Each first and second LED includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip. The centers of the first and second LEDs projected onto the bracket are located on the same center line. The light-emitting chips emitting the same color light from the first and second LEDs are located on different sides of the center line. The first, second, and third light-emitting chips emit different colors of light. The lens is located on the light-emitting side of each first and second LED, spaced apart from each LED. Because in the light source device of this application, the light-emitting chips emitting the same color light from adjacent LEDs are located on different sides of the same center line, when light passes through the lens, the focusing points of the light emitted by each light-emitting chip are brought closer together, improving the consistency and directionality of the light output of the light source device. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is one of the structural schematic diagrams of a light source device in one embodiment of this application.

[0034] Figure 2 This is a schematic diagram of the structure of the first and second LED beads in one embodiment of this application.

[0035] Figure 3 This is an optical path diagram of the light emitted by each first lamp and each second lamp in one embodiment of this application after passing through a lens.

[0036] Figure 4 This is a schematic diagram showing that the centers of a plurality of first LED beads and a plurality of second LED beads are located on the same straight line in one embodiment of this application.

[0037] Figure 5 This is a schematic diagram showing that the centers of a plurality of first LED beads and a plurality of second LED beads are located on a plurality of closed curves in one embodiment of this application.

[0038] Figure 6 This is a second schematic diagram of the structure of the light source device in one embodiment of this application.

[0039] Explanation of icon numbers:

[0040] 110: Bracket; 120: First LED bead; 121: First LED chip; 122: Second LED chip; 123: Third LED chip; 124: Encapsulating resin; 130: Second LED bead; 140: Lens; 150: Cooling fan; 160: Heat sink. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] The light source device in this embodiment can be applied to the field of multispectral imaging, such as PCB (Printed Circuit Board) inspection and printing inspection. The light source device in this embodiment can effectively improve the problems of poor light emission consistency and poor directionality, thereby promoting the development of optical imaging in the field of color AOI (Automated Optical Inspection).

[0048] See Figure 1 and attached Figure 2 , Figure 1 A schematic diagram of the structure of a light source device according to an embodiment of this application is shown. Figure 2 A schematic diagram of the structure of the first LED 120 and the second LED 130 in one embodiment of this application is shown. The light source device in this embodiment includes a bracket 110, a lens 140, a plurality of first LEDs 120 and a plurality of second LEDs 130.

[0049] The bracket 110 of the light source device fixes each light-emitting chip in each of the first lamp beads 120 and each of the second lamp beads 130 in a preset position to ensure that the relative position of each light-emitting chip is stable.

[0050] Multiple first LED beads 120 and multiple second LED beads 130 are disposed on the bracket 110. The first LED beads 120 and the second LED beads 130 are arranged alternately. Each of the first LED beads 120 and the second LED beads 130 includes a first light-emitting chip 121, a second light-emitting chip 122, and a third light-emitting chip 123. The centers of the first LED beads 120 and the second LED beads 130 in the orthographic projection of the bracket 110 are located on the same center line l. The light-emitting chips in the first LED beads 120 and the second LED beads 130 that emit light of the same color are disposed on different sides of the center line l. The first light-emitting chip 121, the second light-emitting chip 122, and the third light-emitting chip 123 are used to emit light of different colors.

[0051] The center line l can be a straight line or a curve. The light-emitting chips emitting the same color light in the first LED 120 and the second LED 130 are located on different sides of the center line l. For example, the first light-emitting chip 121 in the first LED 120 is located on the first side of the center line l, and the first light-emitting chip 121 in the second LED 130 is located on the second side of the center line l. The second light-emitting chips 122 and 123 in the first LED 120 are located on the second side of the center line l, and the second light-emitting chips 122 and 123 in the second LED 130 are located on one side of the center line l.

[0052] For example, the first light-emitting chip 121, the second light-emitting chip 122 and the third light-emitting chip 123 can be used to emit red light, green light and blue light respectively, and are not limited thereto.

[0053] The lens 140 of the light source device is disposed on the light-emitting side of each first lamp bead 120 and each second lamp bead 130, and is spaced apart from each first lamp bead 120 and each second lamp bead 130.

[0054] The lens 140 is spaced a certain distance from each LED to reduce optical interference between the LED surface and the lens 140, such as abnormal reflection and refraction. If the lens 140 is too close to the LEDs, when the light emitted from each LED enters the lens 140 through the air between the LED and the lens 140, not all the light emitted from each LED will enter the lens 140 due to the oblique entry from one medium (air) to another (lens). Some light will be reflected back to the vicinity of the LED, resulting in a decrease in luminous efficiency. The spaced arrangement of the light source device with each first LED 120 and each second LED 130 allows the light emitted from each first LED 120 and each second LED 130 to enter the lens 140 at a more regular angle, such as central rays parallel to the optical axis of the lens 140 or small-angle oblique rays, ensuring that the lens 140 effectively performs its focusing, collimating, or homogenizing functions for the light beam.

[0055] In this embodiment, please refer to the appendix. Figure 3 , attached Figure 3 The diagram illustrates the optical path of light emitted from each of the first LED beads 120 and each of the second LED beads 130 in this embodiment, after passing through the lens 140. In this embodiment, the light-emitting chips emitting the same color light from adjacent first LED beads 120 and second LED beads 130 are located on different sides of the same center line l. After the light passes through the lens 140, the focusing points of the light emitted from each light-emitting chip are brought closer to each other, improving the consistency and directionality of the light emitted by the light source device.

[0056] Please refer to the appendix for further details. Figure 2In some embodiments, in the same first LED bead 120 and / or the same second LED bead 130, the first light-emitting chip 121 is arranged along the first direction, and the second light-emitting chip 122 and the third light-emitting chip 123 are arranged along the second direction. The center of the first light-emitting chip 121 is offset from the center of the second light-emitting chip 122 and the center of the third light-emitting chip 123 respectively in a third direction. The first direction is parallel to the second direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0057] One of the light-emitting chips emitting the same color light, located on different sides of the center line l in the first lamp 120 and the second lamp 130, is arranged close to each other. For example, as shown... Figure 2 In this configuration, the first light-emitting chip 121#1 of the first LED bead 120 and the first light-emitting chip 121#2 of the second LED bead 130 are respectively located on different sides of the center line l, and the second light-emitting chip 122#1 of the first LED bead 120 is close to the second light-emitting chip 122#2 of the second LED bead 130. It is understood that in other embodiments, the third light-emitting chip 123#1 of the first LED bead 120 is close to the third light-emitting chip 123#2 of the second LED bead 130.

[0058] For example, the first direction is parallel to the second direction, which can be understood as a horizontal direction, such as the X-axis. The third direction is parallel to the first and second directions, which can be understood as a vertical direction, such as the Y-axis. The first light-emitting chip 121 is arranged along the X-axis, and the second light-emitting chip 122 and the third light-emitting chip 123 are also arranged along the X-axis. The center of the first light-emitting chip 121 is offset from the center of the second light-emitting chip 122 and the center of the third light-emitting chip 123 in the third direction. Therefore, the center of the first light-emitting chip 121 is misaligned with the centers of the second light-emitting chip 122 and the third light-emitting chip 123 in the Y-axis direction. That is, the Y-coordinate of the first light-emitting chip 121 is different from the Y-coordinate of the second light-emitting chip 122 and the third light-emitting chip 123, forming a vertical or horizontal misalignment.

[0059] In this embodiment, the lens 140 refracts light at different angles at different positions. The center of the first light-emitting chip 121 is offset from the centers of the second light-emitting chip 122 and the third light-emitting chip 123 in a third-direction orientation, which matches the curvature distribution of the lens 140. For example, the refractive power of the central region and the edge region of the lens 140 differs. The offset arrangement allows the light emitted from each light-emitting chip to enter the optimal refractive area of ​​the lens 140. After passing through the lens 140, the focusing point is more likely to coincide, unlike the focusing shift caused by the concentrated incident area when arranged in a non-plane manner. By compensating for the differences in optical characteristics of the lens 140 through spatial offset, the directionality of the emitted tri-color light is ultimately improved. In addition, the spatial offset of the light-emitting areas of each light-emitting chip can reduce mutual occlusion, and the light emitted from each light-emitting chip can enter the lens 140 more completely, improving the overall light output efficiency.

[0060] Please refer to the appendix for further details. Figure 1 In some embodiments, both the first LED chip 120 and the second LED chip 130 may include an encapsulating resin 124. The orthographic projection of the encapsulating resin 124 onto the bracket 110 covers the orthographic projections of the first light-emitting chip 121, the second light-emitting chip 122, and the third light-emitting chip 123 onto the bracket 110.

[0061] In this embodiment, the encapsulating resin 124 can be high-transmittance silicone or epoxy resin, with a certain refractive index. The light emitted by each light-emitting chip undergoes refraction and slight scattering as it propagates within the resin. The orthographic projection of the encapsulating resin 124 onto the support 110 covers the orthographic projections of the first light-emitting chip 121, the second light-emitting chip 122, and the third light-emitting chip 123 onto the support 110. The different colors of light emitted from the first light-emitting chip 121, the second light-emitting chip 122, and the third light-emitting chip 123 permeate and mix within the encapsulating resin 124 before exiting. The different colors of light are uniformly refracted by the resin before being emitted, reducing localized light loss due to obstruction and minimizing color unevenness caused by spatial separation after light emission, thus ensuring consistent light output.

[0062] In some embodiments, the light source device in this application may include a driving circuit, which is connected to each first lamp bead and each second lamp bead, and is used to drive each first lamp bead and each second lamp bead to emit light.

[0063] The drive circuit can be connected to each of the first and second LEDs in parallel or series. When the first and second LEDs are connected in parallel, the voltage across each LED is the same. The drive circuit ensures a stable operating current for each LED by controlling the total voltage and branch current. If one LED fails (e.g., due to an open circuit), it does not affect the operation of the other LEDs. When the first and second LEDs are connected in series, the LEDs are connected end-to-end and carry the same current. The drive circuit only needs to control the total current to ensure current consistency among the LEDs, resulting in better current uniformity and reducing the voltage output pressure on the drive circuit.

[0064] The driving circuit can be connected to the first, second, and third light-emitting chips in a one-to-one correspondence through multiple individual driving sub-circuits, enabling each color of light to emit light independently. Even with slight deviations in luminous efficiency and wavelength among the first, second, and third light-emitting chips, the output intensity of the three colors can be balanced by independently controlling the current in each channel, improving the color accuracy of the mixed light, and also flexibly adjusting the brightness of each light-emitting chip.

[0065] The driving circuit can also be a single driving circuit, which is connected to the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip, so that each light-emitting chip emits light simultaneously under the drive of the same driving signal. All light-emitting chips are controlled by the same driving signal, which can avoid asynchronous light emission caused by channel delay when controlled independently (such as a certain color light lighting up in advance), and ensure the stability of the mixed light in the time dimension.

[0066] In some embodiments, the light source device in this application may include a driver board. The driver board is used to carry the driving circuit and the bracket.

[0067] In this embodiment, the driver board provides a precise mounting reference for the bracket, such as positioning holes, clips, and screw holes, so that the relative positions of the bracket and each LED on it and the driver circuit are fixed, such as aligning the solder joints of the chip electrodes and the driver circuit, avoiding poor electrical connection or optical alignment deviation caused by positional offset, and reducing the risk of the focusing point shifting.

[0068] In some embodiments, the light source device in this application may include a fixing structure, which may include multiple fixing slots. The multiple fixing slots are used to fix the driver board, so as to adjust the distance between each first and second LED in the driver board and the lens by placing at least one of the driver board in different fixing slots.

[0069] For example, the fixing structure may include a first fixing position, a second fixing position, a third fixing position, and a fourth fixing position. The first fixing position is close to the light outlet of the light source device and is used to fix the lens. At this time, any one of the second, third, and fourth fixing positions can be used to fix the driver board. The second, third, and fourth fixing positions are arranged sequentially in the direction away from the light outlet. Therefore, when the driver board is located in the second fixing position, the distance between each LED and the lens is the smallest. When the driver board is located in the third fixing position, the distance between each LED and the lens is larger and the distance between each LED and the lens is the largest.

[0070] Minor errors can occur during the welding of individual LED chips, lens injection molding (e.g., uneven thickness), and driver board processing (e.g., flatness error), causing the actual distance between the LED chips and the lens to deviate from the design value. In this embodiment, by adjusting the distance between each LED chip and the lens using multiple fixed positions in the fixed structure, the error between the object distance of each LED chip and the lens and the design value can be made to meet the preset requirements, improving the accuracy of the focusing point overlap of each LED chip and reducing the deviation of the light output direction or uneven brightness caused by the object distance error between each LED chip and the lens.

[0071] If the light emitted from the first and / or second LEDs at the edge of the drive board is not constrained, it may enter the ineffective area of ​​the lens through reflection from components such as the drive board and bracket (e.g., specular reflection from a metal bracket), or directly illuminate the non-observation area of ​​the target being detected, forming stray light. This stray light can reduce imaging contrast (e.g., causing blurred defect edges in AOI inspection) or interfere with the mixing ratio of the three colors (e.g., excessive reflection of red light at the edge leading to local color cast). Based on this, in some embodiments of this application, the light source device may include a color absorber. The color absorber is disposed around the periphery of the light transmission path between the drive board and the lens, and is used to absorb at least a portion of the light emitted from the target LED; the target LED is the first and / or second LED disposed at the edge of the drive board.

[0072] The color-absorbing plate in this embodiment can be made of a matte black material with high absorption rate, such as blackened oxidized metal or light-absorbing resin. Located around the periphery of the light transmission path (such as the edge of the lens or the edge of the driver board), the color-absorbing plate can specifically absorb some of the light spilling out to the sides from the edge LEDs, balancing the brightness difference between the edge and center areas and improving the overall light uniformity. By absorbing edge light, the color-absorbing plate can purify the light transmission path, ensuring that the light received by the lens mainly comes from the forward emission of the LEDs, thus improving the anti-interference capability of the optical system.

[0073] In some embodiments, the driving circuit in this application may include a first driving sub-circuit, a second driving sub-circuit, and a third driving sub-circuit. The first driving sub-circuit is connected to each first light-emitting chip and is used to connect to an external controller; the second driving sub-circuit is connected to each second light-emitting chip and is used to connect to an external controller; the third driving sub-circuit is connected to each third light-emitting chip and is used to connect to an external controller; wherein, the first driving sub-circuit, the second driving sub-circuit, and the third driving sub-circuit are used to adjust the driving parameters output to the corresponding light-emitting chip under the control of the external controller, so as to adjust the light emission brightness of the corresponding light-emitting chip.

[0074] The driving parameters can be current, voltage, PWM (Pulse Width Modulation) duty cycle, etc.

[0075] In this embodiment, the first driving sub-circuit, the second driving sub-circuit, and the third driving sub-circuit are respectively connected to an external controller, so that the light source device can cooperate with the external controller to independently control the light-emitting chips that emit different colors of light, and perform differentiated driving on the light-emitting chips that emit different colors of light to adapt to different display requirements. For example, for light emitting a single color of light, temperature compensation is performed on a single light-emitting chip to improve the light emission quality, etc.

[0076] Combined with appendix Figure 4 , attached Figure 4A schematic diagram is shown with the centers of a plurality of first LED beads 120 and a plurality of second LED beads 130 aligned on a straight line. In some embodiments, the plurality of first LED beads 120 and the plurality of second LED beads 130 are arranged alternately, and the centers of the plurality of first LED beads 120 and the plurality of second LED beads 130 are aligned on a straight line.

[0077] In this embodiment, the centers of each first LED 120 and each second LED 130 are located on the same straight line, and the alignment with the optical central axis of the lens 140 is more precise (such as the focal line of a line lens (a one-dimensional condensing lens, such as a cylindrical lens or a strip lens) coincides with the LED arrangement line), so that the light emitted from each first LED 120 and each second LED 130 enters the lens 140 at almost the same angle and forms a regular beam after refraction.

[0078] Combined with appendix Figure 5 , attached Figure 5 A schematic diagram is shown showing the centers of a plurality of first LEDs 120 and a plurality of second LEDs 130 located on a plurality of closed curves. In some embodiments, the plurality of first LEDs 120 and the plurality of second LEDs 130 are arranged alternately, and at least a portion of the lines connecting the centers of the plurality of first LEDs 120 and the centers of the plurality of second LEDs 130 form closed curves.

[0079] The closed curve can be a circle, an ellipse, a ring, a matrix, etc.

[0080] In this embodiment, the closed curve layout can be matched with the annular lens 140. The center line connecting the multiple first LEDs 120 and the second LEDs 130 forms a closed curve. After the light emitted from the multiple first LEDs 120 and the second LEDs 130 is refracted by the annular lens 140 with the same curvature, it can form a beam focused on the same circumference or plane, which is suitable for annular focusing scenarios (such as the annular scanning light in wafer inspection). The closed curve layout can be compactly arranged around the illumination target to achieve multi-directional illumination in a limited space (such as a small inspection module), and can also reduce the number of LEDs compared to an omnidirectional distributed arrangement.

[0081] See appendix Figure 6 , attached Figure 6 The second schematic diagram shows the structure of a light source device according to one embodiment of this application. In some embodiments, the light source device in this application further includes a cooling fan 150 and / or a heat sink 160, wherein the cooling fan 150 is used to generate airflow to remove the heat generated by the light source device.

[0082] Heat sink 160 is used to provide heat dissipation area to absorb and conduct heat generated by the light source device.

[0083] In the case where the light source device includes a cooling fan 150 and a heat sink 160, the heat sink 160 is also used to conduct the absorbed heat to the cooling fan 150.

[0084] In this embodiment, the cooling fan 150 enables active cooling of the light source device (heat generated by the light-emitting chip and / or the driving circuit), while the heat sink 160 enables passive cooling of the light source device (heat generated by the light-emitting chip and / or the driving circuit). This ensures the light source device operates at a safe temperature, guaranteeing luminous efficiency stability and lifespan. When the light source device includes both the cooling fan 150 and the heat sink 160, the heat absorbed by the heat sink 160 is conducted to the cooling fan 150, and the airflow generated by the cooling fan 150 carries away the heat generated by the light source device. This achieves a coordinated effect of active and passive cooling, improving the heat dissipation efficiency of the light source device.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light source device, characterized in that, include: support; Multiple first LED beads and multiple second LED beads are disposed on the bracket. The first LED beads and the second LED beads are arranged alternately. Each of the first LED beads and the second LED beads includes a first light-emitting chip, a second light-emitting chip, and a third light-emitting chip. The centers of the orthographic projections of the first LED beads and the second LED beads on the bracket are located on the same center line. The light-emitting chips of the first LED beads and the second LED beads that emit light of the same color are disposed on different sides of the center line. The first light-emitting chip, the second light-emitting chip, and the third light-emitting chip are used to emit light of different colors. Lenses are disposed on the light-emitting side of each of the first and second lamp beads, and are spaced apart from each of the first and second lamp beads.

2. The light source device according to claim 1, characterized in that, In the same first LED bead and / or the same second LED bead, the first light-emitting chip is arranged along a first direction, and the second and third light-emitting chips are arranged along a second direction. The center of the first light-emitting chip is offset from the center of the second light-emitting chip and the center of the third light-emitting chip in a third direction. The first direction is parallel to the second direction, and the third direction is perpendicular to the first direction and the second direction.

3. The light source device according to claim 1, characterized in that, Both the first LED and the second LED include: An encapsulating resin is used to cover the orthographic projections of the first light-emitting chip, the second light-emitting chip, and the third light-emitting chip onto the bracket.

4. The light source device according to claim 1, characterized in that, Also includes: A driving circuit is connected to each of the first LED beads and each of the second LED beads, and is used to drive each of the first LED beads and each of the second LED beads to emit light.

5. The light source device according to claim 4, characterized in that, Also includes: A driver board is used to support the drive circuit and the bracket.

6. The light source device according to claim 5, characterized in that, Also includes: The fixed structure includes multiple fixing slots for fixing the drive board, so as to adjust the distance between the first and second LEDs in the drive board and the lens by setting at least one of the drive board in different fixing slots.

7. The light source device according to claim 5, characterized in that, Also includes: A color-absorbing plate is disposed on the periphery of the light transmission path between the driving plate and the lens, and is used to absorb at least a portion of the light emitted by the target lamp bead. The target LED bead is the first LED bead and / or the second LED bead located on the edge of the drive board.

8. The light source device according to claim 4, characterized in that, The driving circuit includes: The first driving sub-circuit is connected to each of the first light-emitting chips and is used to connect to an external controller. The second driving sub-circuit is connected to each of the second light-emitting chips and is used to connect to the external controller; The third driving sub-circuit is connected to each of the third light-emitting chips and is used to connect to the external controller; The first driving sub-circuit, the second driving sub-circuit, and the third driving sub-circuit are respectively used to adjust the driving parameters output to the corresponding light-emitting chip under the control of the external controller, so as to adjust the light-emitting brightness of the corresponding light-emitting chip.

9. The light source device according to claim 1, characterized in that, Multiple first LED beads and multiple second LED beads are arranged alternately, and the centers of the multiple first LED beads and multiple second LED beads are located on the same straight line; or, The plurality of first LED beads and the plurality of second LED beads are arranged alternately, and at least a portion of the line connecting the centers of the plurality of first LED beads and the centers of the plurality of second LED beads forms a closed curve.

10. The light source device according to claim 1, characterized in that, Also includes: A cooling fan is used to generate airflow to remove the heat generated by the light source device; and / or, Heat sink, used to provide heat dissipation area to absorb and conduct heat generated by the light source device; In the case where the light source device includes the cooling fan and the heat sink, the heat sink is also used to conduct the absorbed heat to the cooling fan.

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