Bar light source used for backlight imaging

Abstract

This utility model discloses a strip light source for backlit imaging, relating to the field of detection light source technology. The strip light source for backlit imaging includes a light-emitting component, a first diffuser plate, a second diffuser plate, and a first connector. The light-emitting component includes a base, a support block, and a light-emitting element. A first receiving space is defined between two first receiving slots; the first receiving space is located above the light outlet. A second receiving space is defined between two second receiving slots; the second receiving space is located below the light outlet. The light-emitting element is located above the first receiving space. The first diffuser plate is disposed within the first receiving space. The second diffuser plate is movably disposed within the second receiving space along a first horizontal direction. This utility model allows for the installation or removal of the second diffuser plate according to the light intensity and uniformity requirements emitted by the light-emitting element, adjusting the number of diffuser plate structures the light needs to pass through, thus exhibiting high adaptability.

Description

Technical Field

[0001] This utility model relates to the field of detection light source technology, and in particular to a strip light source for backlit imaging. Background Technology

[0002] In machine vision imaging, in order to obtain high-contrast images with sharp edges, there are situations where strip light sources are used as backlights.

[0003] When using a strip light source as backlight, the image captured by the camera is prone to vertical stripes perpendicular to the length of the light source. This is because plug-in LED beads are essentially individual point light sources, not a continuous and uniform light source. Furthermore, plug-in LED beads have a relatively small beam angle, with each bead forming a relatively bright area on the plane, which attenuates towards the edges. That is, the brightness is highest in the area directly in front of the bead, while the brightness is relatively low in the area between two beads. When the camera shoots perpendicular to this plane, it captures this periodic change in brightness, which appears as bright and dark vertical stripes perpendicular to the length of the light source in the image. To address this, a diffuser plate structure can be added to mitigate and eliminate the vertical stripes and the problem of alternating bright and dark areas. However, if the transparency of the diffuser plate is too low, it will lead to a decrease in light intensity, affecting the light intensity effect. Increasing the brightness of the LED beads can also help, but it requires more power and increases energy costs. However, if the transparency of the diffuser plate is too high, it is still difficult to guarantee a uniform lighting effect, resulting in poor adaptability. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a strip light source for backlight imaging, which can adjust the number of diffuser plates that the light needs to pass through, and has good adaptability.

[0005] To achieve the above objectives, this utility model provides a strip light source for backlit imaging. The strip light source includes a light-emitting component, a first diffuser plate, a second diffuser plate, and a first connector. The light-emitting component includes a base, a support block, and a light-emitting element. The base is provided with a first receiving groove, a light-emitting port, and a receiving cavity. The light-emitting port is located at the bottom end of the base and communicates with the receiving cavity. Two first receiving grooves are provided, both extending along a first horizontal direction. The two first receiving grooves are respectively located on opposite side walls of the receiving cavity along a second horizontal direction. The two first receiving grooves are arranged opposite each other, defining a first receiving space between them. The first receiving space is located above the light-emitting port. Two support blocks are provided, both connected to the bottom end of the base. The two support blocks are arranged opposite each other along the second horizontal direction and spaced apart. A second receiving groove is provided on each opposite side surface of the two support blocks, extending along the first horizontal direction. The light-emitting element is disposed in the first horizontal direction and extends through the light source. Two second receiving slots are disposed opposite each other, and a second receiving space is defined between them. The second receiving space is located below the light-emitting port. The light-emitting element is disposed within the receiving cavity and above the first receiving space. The first horizontal direction and the second horizontal direction are perpendicular to each other. A first diffuser plate is disposed in the two first receiving slots along both sides of the second horizontal direction, and is also disposed within the first receiving space. The cross-section of the first diffuser plate is larger than the cross-section of the light-emitting port. A second diffuser plate is disposed in the two second receiving slots along both sides of the second horizontal direction, and is movably disposed within the second receiving space along the first horizontal direction. The cross-section of the second diffuser plate is larger than the cross-section of the light-emitting port. A first connector detachably connects the second diffuser plate and the base.

[0006] Furthermore, the seat includes a main body and end plates; the first receiving groove is disposed on the main body, and the support block is connected to the main body; a through groove is provided at the bottom end of the main body, and the through groove is disposed through the first horizontal direction; two end plates are provided, and the two end plates are respectively disposed at the two ends of the main body along the first horizontal direction, and cover the opening of the through groove, so as to define the receiving cavity and the light outlet with the main body; the first connector detachably connects the second diffuser plate and the end plates.

[0007] Furthermore, the bottom end of the end plate is provided with a first mounting hole, and the two ends of the second diffuser plate along the first horizontal direction are provided with second mounting holes, and the two second mounting holes are respectively provided opposite to the first mounting holes of the two end plates; two first connectors are provided, and are respectively passed through the two opposite first mounting holes and second mounting holes.

[0008] Furthermore, the bottom ends of both end plates abut against the top end of the second diffuser plate.

[0009] Furthermore, the main body includes side plates and a top plate; two side plates are provided, and they are arranged opposite to each other and spaced apart along the second horizontal direction; two support blocks are respectively connected to the bottom ends of the two side plates; a first receiving groove and a limiting groove are provided on the opposite end faces of the two side plates, the first receiving groove is located at the lower part of the side plate, and the limiting groove is located at the upper part of the side plate; the two ends of the top plate along the second horizontal direction are located in the limiting grooves and are detachably connected to the two side plates, and the top plate and the two side plates define the through groove; both end plates are detachably connected to the top plate and the two side plates.

[0010] Furthermore, a heat dissipation block is provided at the top of the top plate, and multiple heat dissipation blocks are provided and arranged at intervals along the first horizontal direction and the second horizontal direction.

[0011] Furthermore, the two end plates are arranged opposite each other along the first horizontal direction; a third receiving groove is provided on the opposite end face of the two end plates, and the two ends of the first diffuser plate along the first horizontal direction are respectively disposed in the two third receiving grooves.

[0012] Furthermore, the light-emitting element includes a circuit board and surface-mount LEDs; the top of the circuit board abuts against the inner wall of the receiving cavity; multiple surface-mount LEDs are provided and are arranged at intervals along the first horizontal direction and the second horizontal direction at the bottom of the circuit board.

[0013] Furthermore, multiple second diffuser plates are provided, and each is different from the first diffuser plate; one of the second diffuser plates is provided within the second accommodating space.

[0014] Furthermore, the support block is integrally formed with the base body.

[0015] Compared with the prior art, the present invention has the following advantages: 1. In the embodiment of the present invention, the light emitted by the light-emitting element in the accommodating cavity needs to pass through the first diffuser plate located in the first accommodating space, through the light outlet, and then through the second diffuser plate located in the second accommodating space before being emitted outward; wherein, by setting the first diffuser plate and the second diffuser plate, the emitted light can be made uniform, which can effectively eliminate the problems of vertical stripes and alternating light and dark, and the cross-sections of the first diffuser plate and the second diffuser plate are both larger than the cross-section of the light outlet, which can reduce light leakage and further ensure the uniformity of light emission.

[0016] 2. The first diffuser plate is disposed in two first receiving slots at its two ends along the second horizontal direction, thereby defining the position of the first diffuser plate. The second diffuser plate is disposed in two second receiving slots at its two ends along the second horizontal direction, thereby defining the position of the second diffuser plate. The second diffuser plate can be connected to the base body via a first connector, so that the second diffuser plate can be detached from the second receiving slot after the first connector is removed. When the light emitted by the light-emitting element has high brightness and it is necessary to improve the uniformity of illumination, the second diffuser plate can be installed in the second receiving space. This design ensures that the light emitted by the light-emitting element needs to pass through the first and second diffuser plates before being emitted outwards. When the brightness of the light emitted by the light-emitting element is low and the intensity of illumination needs to be increased, the second diffuser plate can be removed from the second receiving space, so that the light emitted by the light-emitting element only needs to pass through the first diffuser plate before being emitted outwards. The second diffuser plate and the base are detachably connected by the first connector, and the second receiving groove is arranged through the first horizontal direction. According to the intensity and uniformity requirements of the light emitted by the light-emitting element, the second diffuser plate can be installed or removed to adjust the number of diffuser plate structures that the light needs to pass through, resulting in high adaptability. Attached Figure Description

[0017] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the bar light source for backlight imaging according to this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the strip light source for backlight imaging of this utility model from another perspective;

[0020] Figure 3This is a cross-sectional view of the strip light source for backlight imaging according to the present invention.

[0021] Figure 4 This is a schematic diagram of the main body and support block of the strip light source for backlight imaging according to this utility model;

[0022] Figure 5 for Figure 3 A schematic diagram of the structure of the strip light source for backlight imaging of this utility model from another perspective;

[0023] Figure 6 This is a cross-sectional view of the base of the strip light source for backlight imaging according to this utility model.

[0024] Reference numerals: First diffuser plate 100; Second diffuser plate 200; Second mounting hole 210; Light-emitting component 300; First receiving space 301; Second receiving space 302; Base 310; First receiving groove 311; Light outlet 312; Receiving cavity 313; Main body 320; End plate 321; Through groove 322; First mounting hole 323; Side plate 324; Top plate 325; Limiting groove 326; Heat sink 327; Third receiving groove 328; Support block 330; Second receiving groove 331; Light-emitting element 340; Circuit board 341; SMD LED 342. Detailed Implementation

[0025] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0028] like Figures 1 to 6As shown, according to an embodiment of the present invention, a strip light source for backlit imaging includes a light-emitting component 300, a first diffuser plate 100, a second diffuser plate 200, and a first connector; the light-emitting component 300 includes a base 310, a support block 330, and a light-emitting element 340; the base 310 is provided with a first receiving groove 311, a light-emitting port 312, and a receiving cavity 313; the light-emitting port 312 is located at the bottom end of the base 310 and communicates with the receiving cavity 313; the first receiving groove 311... Two first receiving slots 311 are provided, both extending along the first horizontal direction; two first receiving slots 311 are respectively provided on the opposite side walls of the receiving cavity 313 along the second horizontal direction; the two first receiving slots 311 are arranged opposite each other, and a first receiving space 301 is defined between them; the first receiving space 301 is located above the light outlet 312; two support blocks 330 are provided, both connected to the bottom end of the base 310; the two support blocks 330 are arranged opposite each other along the second horizontal direction and spaced apart; a second receiving slot 331 is provided on the opposite side end face of the two support blocks 330, and the second receiving slot 331 is arranged through the first horizontal direction; the two second receiving slots 331 are arranged opposite each other, and a second receiving space 302 is defined between them; the second receiving space 302 is located below the light outlet 312; a light-emitting element 340 is provided in the receiving cavity 313 and located above the first receiving space 301; wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other; the two ends of the first diffuser plate 100 along the second horizontal direction are respectively provided on the two first receiving slots. Inside the slot 311, the first diffuser plate 100 is disposed in the first receiving space 301; the cross-section of the first diffuser plate 100 is larger than the cross-section of the light outlet 312; the two ends of the second diffuser plate 200 along the second horizontal direction are respectively disposed in the two second receiving slots 331, and the second diffuser plate 200 is movably disposed in the second receiving space 302 along the first horizontal direction; the cross-section of the second diffuser plate 200 is larger than the cross-section of the light outlet 312; the first connector detachably connects the second diffuser plate 200 and the base 310.

[0029] 1. In this embodiment of the present invention, the light emitted by the light-emitting element 340 in the receiving cavity 313 needs to pass through the first diffuser plate 100 located in the first receiving space 301, through the light outlet 312, and then through the second diffuser plate 200 located in the second receiving space 302 before being emitted outward. By setting the first diffuser plate 100 and the second diffuser plate 200, the emitted light can be made uniform, which can effectively eliminate the problems of vertical stripes and alternating light and dark areas. Furthermore, the cross-sections of the first diffuser plate 100 and the second diffuser plate 200 are both larger than the cross-section of the light outlet 312, which can reduce light leakage and further ensure the uniformity of light emission.

[0030] 2. The first diffuser plate 100 is respectively disposed in two first receiving grooves 311 at both ends along the second horizontal direction, so that the position of the first diffuser plate 100 can be defined by the first receiving grooves 311. The second diffuser plate 200 is respectively disposed in two second receiving grooves 331 at both ends along the second horizontal direction, so that the position of the second diffuser plate 200 can be defined by the second receiving grooves 331. The second diffuser plate 200 can be connected to the base 310 through the first connector, so that the second diffuser plate 200 can be removed from the second receiving grooves 331 after the first connector is removed. When the light emitted by the light-emitting element 340 has a high brightness and it is necessary to improve the uniformity of illumination, the second diffuser plate 200 can be installed in the second receiving grooves 331. Within the space 302, the light emitted by the light-emitting element 340 needs to pass through the first diffuser plate 100 and the second diffuser plate 200 before being emitted outward. When the brightness of the light emitted by the light-emitting element 340 is low and the intensity of illumination needs to be increased, the second diffuser plate 200 can be removed from the second receiving space 302, so that the light emitted by the light-emitting element 340 only needs to pass through the first diffuser plate 100 before being emitted outward. The second diffuser plate 200 and the base 310 are detachably connected by the first connector, and the second receiving groove 331 is arranged through the first horizontal direction. According to the intensity and uniformity requirements of the light emitted by the light-emitting element, the second diffuser plate 200 can be installed or removed to adjust the number of diffuser plate structures that the light needs to pass through, which has high adaptability.

[0031] Reference Figure 1 Figure 4 In some embodiments of this utility model, the base 310 includes a main body 320 and an end plate 321; a first receiving groove 311 is disposed on the main body 320, and a support block 330 is connected to the main body 320; a through groove 322 is provided at the bottom end of the main body 320, and the through groove 322 is disposed through the first horizontal direction; two end plates 321 are provided, and the two end plates 321 are respectively disposed at the two ends of the main body 320 along the first horizontal direction, and cover the opening of the through groove 322, so as to form a receiving cavity 313 and a light outlet 312 with the definition of the main body 320; a first connecting member detachably connects the second diffuser plate 200 and the end plate 321.

[0032] The main body 320 is provided with a through groove 322 that extends along the first horizontal direction. Two first receiving grooves 311 are provided on the inner wall of the through groove 322, and the lower end of the through groove 322 extends through the bottom of the main body 320. Two end plates 321 are respectively provided at the opening of the through groove 322 to close the opening of the through groove 322. Thus, the two end plates 321 and the main body 320 define a receiving cavity 313 and a light outlet 312. The light-emitting element 340 is provided in the receiving cavity 313 so that the light-emitting element 340 can be easily installed and removed.

[0033] The length of the second diffuser plate 200 is greater than the length of the main body 320, so that both ends of the second diffuser plate 200 extend outside the second receiving groove 331, so that the first connector can detachably connect the second diffuser plate 200 and the end plate 321.

[0034] Reference Figure 2 and Figure 6 In some embodiments of this utility model, the bottom end of the end plate 321 is provided with a first mounting hole 323, and the two ends of the second diffuser plate 200 along the first horizontal direction are provided with second mounting holes 210. The two second mounting holes 210 are respectively arranged opposite to the first mounting holes 323 of the two end plates 321. Two first connectors are provided, and are respectively inserted through the two opposite first mounting holes 323 and second mounting holes 210.

[0035] Specifically, both the first mounting hole 323 and the second mounting hole 210 are threaded holes, and the first connector is a threaded connection structure. The second diffuser plate 200 and the end plate 321 can be detachably connected through the first connector to ensure the stability of the connection.

[0036] Reference Figure 2 In some embodiments of this utility model, the bottom ends of both end plates 321 abut against the top end of the second diffuser plate 200.

[0037] The bottom end of the second diffuser plate 200 abuts against the support block 330, and the top end of the second diffuser plate 200 abuts against the bottom end of the end plate 321, so as to limit the position of the second diffuser plate 200 in the vertical direction and ensure the stability of the second diffuser plate 200 in operation.

[0038] Reference Figures 2 to 4 In some embodiments of this utility model, the main body 320 includes a side plate 324 and a top plate 325; two side plates 324 are provided, and are arranged opposite to each other and spaced apart along the second horizontal direction; two support blocks 330 are respectively connected to the bottom ends of the two side plates 324; a first receiving groove 311 and a limiting groove 326 are provided on the opposite end faces of the two side plates 324, the first receiving groove 311 is located at the lower part of the side plate 324, and the limiting groove 326 is located at the upper part of the side plate 324; the two ends of the top plate 325 along the second horizontal direction are located in the limiting groove 326 and are detachably connected to the two side plates 324, and a through groove 322 is defined between the top plate 325 and the two side plates 324; two end plates 321 are detachably connected to the top plate 325 and the two side plates 324.

[0039] Since the limiting groove 326 extends vertically to the top of the side plate 324, the top plate 325 can move up and down vertically to adjust the position of the top plate 325 between the two side plates 324, thereby adjusting the size of the receiving cavity 313 and adapting to different sizes of light-emitting elements 340. Specifically, the light-emitting element 340 includes a circuit board 341, and the two ends of the circuit board 341 along the second horizontal direction are respectively located in the limiting groove 326 of the two side plates 324. By moving the top plate 325 up and down, different sizes of light-emitting elements 340 can be adapted.

[0040] Specifically, the side plate 324 and the top plate 325, the side plate 324 and the end plate 321, and the top plate 325 and the end plate 321 can be connected to each other through a threaded connection structure.

[0041] Reference Figure 1 and Figure 3 In some embodiments of this utility model, a heat dissipation block 327 is provided at the top of the top plate 325. Multiple heat dissipation blocks 327 are provided and are arranged at intervals along the first horizontal direction and the second horizontal direction.

[0042] The heat sink 327 can improve the heat dissipation of the light-emitting element 340.

[0043] Specifically, the circuit board 341 of the light-emitting element 340 abuts against the bottom end of the top plate 325 to improve the heat transfer of the light-emitting element 340 to the top plate 325, and the top plate 325 can dissipate heat through the heat sink 327.

[0044] Reference Figure 1 , Figure 2 and Figure 6 In some embodiments of this utility model, two end plates 321 are arranged opposite each other along a first horizontal direction; a third receiving groove 328 is provided on the opposite end face of the two end plates 321, and the two ends of the first diffuser plate 100 along the first horizontal direction are respectively disposed in the two third receiving grooves 328.

[0045] By setting the third receiving groove 328, the position of the first diffuser plate 100 can be limited, thereby limiting the position of the first diffuser plate 100 in the first horizontal direction and ensuring the stability of the first diffuser plate 100 within the first receiving space 301.

[0046] In machine vision imaging, bar light sources are sometimes used as backlights to achieve high-contrast, sharp-edged images. However, when bar light sources are used as backlights, the images captured by the camera show vertical stripes perpendicular to the longitudinal direction of the light source. This is because plug-in LEDs are essentially individual point light sources, not continuous and uniform light sources. Furthermore, plug-in LEDs have a relatively small beam angle, causing each LED to form a relatively bright area on the plane, which then fades towards the edges.

[0047] The area directly in front of the LED is the brightest, while the area between two LEDs is relatively dimmer. When the camera shoots perpendicular to this plane, it captures this periodic change in brightness, which appears in the image as bright and dark stripes perpendicular to the length of the light source.

[0048] Reference Figure 5 In some embodiments of this utility model, the light-emitting element 340 includes a circuit board 341 and a surface-mount LED 342; the top of the circuit board 341 abuts against the inner wall of the receiving cavity 313; a plurality of surface-mount LEDs 342 are provided and are arranged at intervals along the first horizontal direction and the second horizontal direction at the bottom of the circuit board 341.

[0049] The surface-mount LED342 has a larger beam angle and a more uniform light intensity distribution. Without the strong central focus caused by the lens of the through-hole LED, it is conducive to uniform light mixing. Furthermore, the light emitted by the densely arranged surface-mount LED342 is more fully superimposed and blended in space, greatly weakening the characteristics of a single point light source. The overall light source is closer to a continuous and uniform light-emitting surface, fundamentally reducing the bright and dark stripes caused by spacing.

[0050] In some embodiments of this utility model, multiple second diffuser plates 200 are provided, and they are all different from each other, and each is different from the first diffuser plate 100; one of the second diffuser plates 200 is provided in the second accommodating space 302.

[0051] Different second diffuser plates 200 have different transparency and haze. Selecting one of the second diffuser plates 200 and installing it in the second receiving groove 331 can control the uniformity and brightness of the emitted light according to the specific situation.

[0052] Specifically, the transparency and haze of different second diffuser plates 200 are different from those of the first diffuser plate 100; among them, the first diffuser plate 100 can be a semi-transparent double-sided frosted diffuser plate, and the second diffuser plate 200 can be a diffuser plate with a transmittance of 53% and a haze of 99%.

[0053] Reference Figure 1 In some embodiments of this utility model, the support block 330 and the base body 310 are integrally formed to reduce the difficulty of manufacturing and processing the support block 330 and improve the stability of the second diffuser plate 200.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A strip light source for backlight imaging, characterized in that, include: The light-emitting component (300) includes a base (310), a support block (330), and a light-emitting element (340). The base (310) is provided with a first receiving groove (311), a light-emitting port (312), and a receiving cavity (313). The light-emitting port (312) is located at the bottom end of the base (310) and communicates with the receiving cavity (313). There are two first receiving grooves (311), both of which extend along a first horizontal direction. The two first receiving grooves (311) are respectively located on opposite side walls of the receiving cavity (313) along a second horizontal direction. The two first receiving grooves (311) are arranged opposite each other and define a first receiving space (301) between them. The first receiving space (301) is located above the light-emitting port (312). The bracket (330) is provided in two parts, and both are connected to the bottom end of the base (310); the two brackets (330) are arranged opposite to each other and spaced apart along the second horizontal direction; a second receiving groove (331) is provided on the opposite side end face of the two brackets (330), and the second receiving groove (331) is arranged through the first horizontal direction; the two second receiving grooves (331) are arranged opposite to each other and a second receiving space (302) is defined between them; the second receiving space (302) is located below the light outlet (312); the light-emitting element (340) is disposed in the receiving cavity (313) and located above the first receiving space (301); wherein, the first horizontal direction and the second horizontal direction are perpendicular to each other; The first diffuser plate (100) is disposed in two first receiving slots (311) at both ends along the second horizontal direction, and the first diffuser plate (100) is disposed in the first receiving space (301); the cross-section of the first diffuser plate (100) is larger than the cross-section of the light outlet (312). The second diffuser plate (200) is disposed in two second receiving slots (331) at both ends along the second horizontal direction. The second diffuser plate (200) is movably disposed in the second receiving space (302) along the first horizontal direction. The cross-section of the second diffuser plate (200) is larger than the cross-section of the light outlet (312). The first connector detachably connects the second diffuser plate (200) and the seat (310).

2. The strip light source for backlight imaging according to claim 1, characterized in that, The base (310) includes a main body (320) and an end plate (321); the first receiving groove (311) is disposed on the main body (320), and the support block (330) is connected to the main body (320); a through groove (322) is provided at the bottom end of the main body (320), and the through groove (322) is disposed through the first horizontal direction; two end plates (321) are provided, and the two end plates (321) are respectively disposed at the two ends of the main body (320) along the first horizontal direction, and cover the opening of the through groove (322) to define the receiving cavity (313) and the light outlet (312) with the main body (320); the first connector is detachably connected to the second diffuser plate (200) and the end plate (321).

3. The strip light source for backlight imaging according to claim 2, characterized in that, The end plate (321) is provided with a first mounting hole (323) at its bottom end, and the second diffuser plate (200) is provided with a second mounting hole (210) at both ends along the first horizontal direction. The two second mounting holes (210) are respectively arranged opposite to the first mounting holes (323) of the two end plates (321). There are two first connectors, which are respectively inserted through the two opposite first mounting holes (323) and second mounting holes (210).

4. The strip light source for backlight imaging according to claim 2, characterized in that, The bottom ends of both end plates (321) abut against the top end of the second diffuser plate (200).

5. The strip light source for backlight imaging according to claim 2, characterized in that, The main body (320) includes a side plate (324) and a top plate (325); two side plates (324) are provided, and are arranged opposite to each other and spaced apart along the second horizontal direction; two support blocks (330) are respectively connected to the bottom ends of the two side plates (324); the two side plates (324) are each provided with a first receiving groove (311) and a limiting groove (326) on their opposite end faces, the first receiving groove (311) being located on the side plate (324) At the lower part, the limiting groove (326) is located on the upper part of the side plate (324); the two ends of the top plate (325) along the second horizontal direction are located in the limiting groove (326) and are detachably connected to the two side plates (324), and the top plate (325) and the two side plates (324) define the through groove (322); the two end plates (321) are detachably connected to the top plate (325) and the two side plates (324).

6. The strip light source for backlight imaging according to claim 5, characterized in that, The top of the top plate (325) is provided with a heat sink (327), and multiple heat sinks (327) are provided and arranged at intervals along the first horizontal direction and the second horizontal direction.

7. The strip light source for backlit imaging according to claim 2, characterized in that, The two end plates (321) are arranged opposite each other along the first horizontal direction; a third receiving groove (328) is provided on the opposite end face of the two end plates (321), and the two ends of the first diffuser plate (100) along the first horizontal direction are respectively disposed in the two third receiving grooves (328).

8. The strip light source for backlight imaging according to claim 1, characterized in that, The light-emitting element (340) includes a circuit board (341) and a surface-mount LED (342); the top of the circuit board (341) abuts against the inner wall of the receiving cavity (313); a plurality of surface-mount LEDs (342) are provided and are arranged at intervals along the first horizontal direction and the second horizontal direction at the bottom of the circuit board (341).

9. The strip light source for backlit imaging according to claim 1, characterized in that, Multiple second diffuser plates (200) are provided, and they are all different from each other, and each is different from the first diffuser plate (100); one of the second diffuser plates (200) is provided in the second accommodating space (302).

10. The strip light source for backlight imaging according to claim 1, characterized in that, The support block (330) and the seat (310) are integrally formed.

Images