A reference alignment prism light guide structure for a UV light source

Abstract

The utility model belongs to low -end exposure / solidification light source UV LED technical field, disclose a kind of benchmark alignment prism light guide structure for UV light source, including lamp panel and light guide component;UV LED lamp pearl array is installed on lamp panel, and pressure strip is installed staggeredly with UV LED lamp pearl array;Light guide component includes dark box and is formed by multiple prism-shaped light guide rods and is limited by array of embedding hole array being set in dark box top and bottom and being set in dark box;Array formed by light guide rod is limited by embedding hole array being set in dark box top and bottom and keeps vertical;Dark box is equipped with L block respectively in left and right sides, and L block includes horizontal part and vertical part;Dark box is installed on vertical part by first fastener and can be adjusted up and down, horizontal part is installed on pressure strip by second fastener and can be adjusted front and back, and dark box can be aligned longitudinally and transversely, so that light guide rod is located in the distance above lamp pearl, on the one hand, ensure light stability, on the other hand, ensure optical path coaxial, maintain maximum coupling efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of low-to-mid-range exposure / curing light source UV-LED technology, specifically relating to a reference alignment prism light guide structure for UV light sources. Background Technology

[0002] The light guide structure positioned in front of the light source plays a crucial role in providing stable support, precise positioning, effective protection, and efficient thermal management for delicate and fragile optical components within a strictly confined space. As a key optical interface, this component, through its high diffuse reflection treatment of the inner wall, repeatedly reflects and agitates the strong central hot spot generated by the point light source, outputting a highly uniform emission surface. The light guide also acts as a physical barrier, effectively isolating the high temperatures generated by the light source and protecting the performance of heat-sensitive downstream components (such as LCD panels and sensors). It is an indispensable component for converting high-energy light sources into a regular, uniform, and usable surface light field. Currently, the light guide structures in light sources used in panel edge exposure detection are limited by the application scenarios, with point light sources being the most common. Although these are small in size and easy to fix and adjust, they cannot meet the uniform light effect required by matrix surface light sources. Furthermore, the lens components of UV-cured surface light sources used in the market generally have low light guiding precision, resulting in relatively low refracted light energy for panel detection applications. The installation precision of the light guide structure of the surface light source directly affects the coaxiality of the optical path and the stability of the illumination. Summary of the Invention

[0003] To improve the installation accuracy of surface light sources, this invention provides a reference alignment prism light guide structure for UV light sources, which is adjustable and has high installation stability and accuracy.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a reference alignment prism light guide structure for UV light sources, including a lamp plate and a light guide assembly; The lamp panel is equipped with an array of multiple UV LED beads, and pressure strips are also installed to offset the UV LED bead array. The light guide assembly includes a dark box and an array of multiple frustum-shaped light guide rods disposed within and limited by the dark box; the light guide assembly includes a dark box and an array of multiple frustum-shaped light guide rods (4) disposed within and limited by the dark box; the top and bottom of the dark box are respectively provided with a first embedding hole (12) and a second embedding hole (13) corresponding to the light guide rods (4), the light guide rods (4) are vertically inserted into the first embedding hole (12) and the second embedding hole (13) and the small end of the light guide rods (4) is facing the UV LED beads (5). Specifically, the dark box includes a support frame, a prism mask cover disposed at the top opening of the support frame and provided with a first embedding hole corresponding to the light guide rods, and a bottom plate disposed at the bottom opening of the support frame and provided with a second embedding hole corresponding to the light guide rods; the large end of the light guide rod is embedded in the first embedding hole and the small end is embedded in the second embedding hole, and the centers of the first embedding hole and the second embedding hole are both located on the central axis of the light guide rod.

[0005] The support frame has L-blocks on its left and right sides, each L-block consisting of a horizontal and a vertical section. The support frame is mounted vertically on the vertical section using a first fastener, and the horizontal section is mounted on the pressure strip using a second fastener. Tightening the first fastener fixes the L-blocks relative to the light guide assembly. Loosening the first fastener allows for vertical height adjustment of the light guide assembly. Tightening the second fastener fixes the L-blocks relative to the pressure strip. Loosening the second fastener allows for horizontal center alignment of the light guide assembly, ensuring that the light guide bar array is directly opposite the UV LED lamp bead array and that the small end of the light guide bar is close to the lamp bead.

[0006] The light guide rod can be positioned and fixed relatively within the dark box through the first and second embedding holes. Up-down adjustment facilitates control of the appropriate distance between the small end of the light guide rod and the LED bead. A greater distance results in a smaller beam angle, concentrating the light in a narrow area, allowing for more reflection and refraction within the light guide rod. However, this leads to a smaller, more concentrated light spot reflected from all light guide rods, resulting in poor uniformity of the superimposed light. Too close a distance may cause glare and cause some light to enter the side of the light guide rod at extreme angles, resulting in non-ideal refraction and light energy loss. Back-and-forth adjustment ensures the small end of the light guide rod is aligned directly with the LED bead, guaranteeing that the center of the LED bead is on the central axis of the light guide rod. A pressure strip supports the suspended light guide structure, ensuring that the small end of the light guide rod does not break the thin glass cover of the UV LED bead during lateral alignment. If the pressure strip is omitted, firstly, if the longitudinal adjustment of the L-block is not parallel, it will directly hit the protective glass of the lowest chip, causing the internal wires of the LED to break, resulting in the LED being rendered unusable; secondly, lateral adjustment is performed in direct contact with the lamp board, which can easily lead to wear and exposure of the copper on the lamp board. Furthermore, the LED array is rectangular, and the light guide rod array is cuboid; or, the LED array is square, and the light guide rod array is cubic. The cassette is compatible with the light guide rod array (compatibility here means that the cassette and the light guide rod array are fitted together, and the shape of the light guide rod array is selected as either cuboid or cubic based on its shape).

[0007] Furthermore, the vertical part of the L-block has a first elongated oval hole in the vertical direction, and the horizontal part has a second elongated oval hole in the left-right direction; the support frame has a first mounting hole corresponding to the first elongated oval hole, and a first fastener is inserted into both the first elongated oval hole and the first mounting hole; the pressure strip has a second mounting hole corresponding to the second elongated oval hole, and a second fastener is inserted into both the second elongated oval hole and the second mounting hole; there are at least two L-blocks on the left and right sides of the junction box, or at least two first elongated oval holes and at least two second elongated oval holes spaced apart in the front-back direction are provided on the L-block. The junction box can be adjusted relative to the lamp panel in the vertical and front-back directions using the L-blocks in more than one way. For example, the first elongated oval hole can be set on the support frame, and the first mounting hole can be set on the vertical part of the L-block; similarly, the second elongated oval hole can be set on the pressure strip, and the second mounting hole can be set on the horizontal part of the L-block.

[0008] Furthermore, the fastener can be a bolt that mates with a nut, or a screw, wing bolt, etc., and the first mounting hole and the second mounting hole are respectively provided with internal threads that mate with the fastener threads.

[0009] Furthermore, there are two pressure strips, which are parallel to each other and are respectively arranged on the left and right sides of the lamp panel. Furthermore, there are two L-shaped blocks on each of the left and right sides of the junction box, which are installed on the pressure strips on the same side at intervals along the front-back direction.

[0010] Furthermore, it also includes a fixing plate located in the middle of the support frame and having multiple third embedding holes. Each third embedding hole corresponds to a light guide rod, with the middle part of the light guide rod embedded in the third embedding hole. The limiting effect of the third embedding holes further stabilizes the light guide rod array within the dark box and facilitates installation. During installation, the light guide rods can be inserted one by one into the third and second embedding holes to achieve initial positioning of the light guide rods, and finally the prism mask cover can be installed.

[0011] Furthermore, the light guide rod is shaped like a frustum (total internal reflection light guide, effectively controlling and reshaping the light path). Both the first and third embedding holes are rectangular, with the larger end fitting into the first embedding hole with a gap. The portion of the light guide rod located in the third embedding hole also fits into the third embedding hole with a gap. The beams of each high-energy UV LED point source on the lamp board are forcibly diffused within the well-aligned light guide rod inside the dark box, forming a wide light spot, enabling the light source to achieve a large angular illumination range and excellent light uniformity. Simultaneously, for high-energy LED chips, the distance between the irradiated target and the chip is relatively large due to the light guide structure, which can isolate heat to a certain extent. Even further, the cross-section of the light guide rod is square, and the sides are isosceles trapezoids. The smaller square faces the LED chip, efficiently collecting and guiding the light into the chip. The beam is then diffused more evenly through refraction by the inclined surfaces between the sidewalls.

[0012] Furthermore, the apex corners of the first and third embedding holes are beveled outwards, and the second embedding hole is a round hole, with the cross-section of the light guide near the small end inserted into the round hole. The combination of beveled process holes and round holes facilitates the embedding and removal of the light guide. Because the small end is relatively small, it is more convenient to directly open the round hole on the base plate.

[0013] Compared with the prior art, the technical effects achieved by this utility model are as follows: the setting method of the light guide component can effectively stabilize the light guide rod array. The light guide component is installed on the lamp plate by the pressure strip and the L-block with the elongated hole, which makes it convenient to adjust the longitudinal height and lateral center alignment of the light guide component during later assembly and use, so that the small end of the light guide rod is directly facing the lamp bead and the distance between them is appropriate. On the one hand, it ensures the stability of the illumination, and on the other hand, it ensures the coaxiality of the optical path and maintains the maximum coupling efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the reference alignment prism light guide structure for a UV light source in an embodiment of this utility model.

[0015] Figure 2 for Figure 1 The main view.

[0016] Figure 3 for Figure 1 Top view.

[0017] Figure 4 This is a schematic diagram of the reference alignment prism light guide structure for a UV light source in an embodiment of this utility model. The supporting frame is omitted in the figure.

[0018] Figure 5 This is a structural diagram of the fixed plate.

[0019] Figure 6 This is a schematic diagram of the base plate.

[0020] The reference numerals in the figure are as follows: 1. Support frame, 2. Prism mask cover, 3. Base plate, 4. Light guide rod, 5. UV LED lamp bead, 6. Pressure strip, 7. Lamp board, 8. L-block, 9. First elongated hole, 10. Second elongated hole, 11. Fixing plate, 12. First embedding hole, 13. Second embedding hole, 14. Third embedding hole. Detailed Implementation

[0021] This utility model is not limited to the following specific embodiments. Those skilled in the art can implement this utility model using various other specific embodiments based on the disclosed content. Any modifications or alterations to the design structure and concept of this utility model also fall within the protection scope of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this utility model can be combined with each other.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Specific embodiments of this utility model are as follows: Figures 1 to 6 As shown, a reference alignment prism light guide structure for a UV light source includes a lamp plate 7 and a light guide assembly.

[0025] An array of multiple UV LED beads 5 is installed on the lamp panel 7, and pressure strips 6 are also installed to offset the array of UV LED beads 5. The light guide assembly includes a dark box and a light guide rod array. The light guide rod array is formed by multiple frustum-shaped light guide rods 4, and the light guide rod array is disposed within the dark box and limited by the dark box. The dark box includes a support frame 1, a prism mask cover 2 with multiple first embedding holes 12 covering the top opening of the support frame 1, and a base plate 3 with multiple second embedding holes 13 covering the bottom opening of the support frame 1. The first embedding holes 12 correspond one-to-one with the light guide rod 4, and the large end of the light guide rod 4 is embedded in the first embedding hole 12. In use, the first embedding hole 12 can stabilize the light guide rod 4 from the large end and also serve as the light outlet. The second embedding holes 13 correspond one-to-one with the light guide rod 4, and the small end of the light guide rod 4 passes downward through the second embedding hole 13 and approaches the UV LED bead 5. The centers of the first embedding hole 12 and the second embedding hole 13 are both located on the central axis of the light guide rod 4 (the first embedding hole 12 and the second embedding hole 13 limit the light guide rod 4 in the vertical direction, providing conditions for the small end to face the LED bead, thus ensuring the coaxiality of the light path).

[0026] The dark box has L-blocks 8 on its left and right sides, each L-block consisting of a horizontal and a vertical section. In this embodiment, the L-blocks 8 are integrally molded. The dark box is mounted vertically on the vertical section using a first fastener, and horizontally on the pressure strip 6 using a second fastener. Tightening the first fastener fixes the L-blocks 8 relative to the dark box, while loosening the first fastener allows the light guide assembly to be adjusted upwards or downwards relative to the L-blocks 8. Tightening the second fastener fixes the L-blocks 8 relative to the pressure strip 6, while loosening the second fastener allows the light guide assembly to be adjusted forwards or backwards relative to the pressure strip 6, so that the light guide bar array is directly opposite the UV LED bead 5 array, meaning that the UV LED bead 5 corresponds one-to-one with the light guide bar 4, and the center of the UV LED bead 5 is located on the central axis of the light guide bar 4.

[0027] The light guide rod 4 is securely held vertically within the dark box via the first embedding hole 12 and the second embedding hole 13. Adjusting the light guide assembly vertically allows for easy control of the appropriate distance (generally 1-2 mm) between the small end of the light guide rod 4 and the LED bead. A greater distance results in a smaller beam angle, concentrating the light in a narrower area, allowing for more reflection and refraction within the light guide rod 4. However, this leads to a smaller, more concentrated light spot being reflected from all light guide rods 4, resulting in poor uniformity of the superimposed light. Conversely, a closer distance can cause glare and cause some light to enter the side of the light guide rod 4 at extreme angles, resulting in non-ideal refraction and light energy loss. Vertical adjustment ensures that the small end of the light guide rod 4 is aligned with the LED bead, guaranteeing that the center of the LED bead is on the central axis of the light guide rod 4. A pressure strip 6 supports the suspended light guide structure, preventing the small end of the light guide rod 4 from damaging the thin glass cover of the UV LED bead during lateral alignment. If the pressure strip 6 is omitted, on the one hand, if the longitudinal adjustment of L block 8 is not parallel, it will directly hit the protective glass of the lowest chip, causing the internal wires of the lamp bead to break, resulting in the lamp bead being scrapped; on the other hand, the lateral adjustment is made in direct contact with the lamp board 7, which can easily lead to wear and exposure of the copper on the lamp board 7.

[0028] Specifically, the vertical part of L-block 8 has a first elongated oval hole 9 in the vertical direction, and the horizontal part has a second elongated oval hole 10 in the left-right direction; the support frame 1 has a first mounting hole corresponding to the first elongated oval hole 9, and a first fastener is inserted into both the first elongated oval hole 9 and the first mounting hole; the pressure strip 6 has a second mounting hole corresponding to the second elongated oval hole 10, and a second fastener is inserted into both the second elongated oval hole 10 and the second mounting hole; there are at least two L-blocks 8 on the left and right sides of the junction box, or at least two first elongated oval holes 9 and at least two second elongated oval holes 10 spaced apart in the front-back direction are provided on L-block 8. The junction box can be adjusted relative to the lamp panel 7 in the vertical and front-back directions using L-block 8 in more than one way. For example, the first elongated oval hole 9 can be set on the support frame 1, and the first mounting hole can be set on the vertical part of L-block 8; similarly, the second elongated oval hole 10 can be set on the pressure strip 6, and the second mounting hole can be set on the horizontal part of L-block 8.

[0029] More specifically, the fastener can be a bolt that matches a nut, or a screw, wing bolt, etc., and the first mounting hole and the second mounting hole are respectively provided with internal threads that mate with the fastener threads.

[0030] More specifically, there are two pressure strips 6, parallel to each other, located on the left and right sides of the lamp plate 7. Two first through holes are formed on the pressure strips 6, and a second through hole corresponding to the first through hole is formed on the lamp plate 7. The pressure strips 6 and the lamp plate 7 are connected and fixed by bolts inserted into both the first and second through holes and nuts that mate with the bolts. Washers can be further placed on the bolts to increase the pressure-bearing area. A heat dissipation device can be further installed on the side of the lamp plate 7 away from the lamp beads. A third through hole is formed on the heat dissipation device, corresponding to the first and second through holes. Bolts pass through both the first and third through holes simultaneously, and tightening the nuts secures the heat dissipation device, the lamp plate 7, and the L-blocks 8. Two L-blocks 8 are respectively installed on the pressure strips 6 on the left and right sides of the junction box, spaced apart along the front-to-back direction.

[0031] Specifically, it also includes a fixing plate 11 located in the middle of the support frame 1 and having multiple third embedding holes 14. Each third embedding hole 14 corresponds to a light guide rod 4, with the middle part of the light guide rod 4 embedded in the third embedding hole 14. The limiting effect of the third embedding holes 14 further stabilizes the light guide rod array within the dark box and facilitates installation. During installation, the light guide rods 4 can be inserted one by one into the third embedding hole 14 and the second embedding hole 13 to achieve initial positioning of the light guide rods 4, and finally the prism mask cover 2 is installed. The fixing plate 11 is riveted to the support frame or screwed to it. Specifically, blind holes are opened on the four sides of the fixing plate 11, and internal threads that mate with the external threads of the screws are provided in the blind holes. Through holes are opened on the support frame 1 at positions corresponding to the blind holes. The screws are inserted into the blind holes through the through holes and tightened to achieve the connection between the fixing plate 11 and the support frame 1. Both the prism mask cover 2 and the base plate 3 can be riveted together or screwed together. The top and bottom of the support frame 1 are provided with blind holes with internal threads, and the prism mask cover 2 and the base plate 3 are provided with corresponding through holes.

[0032] The light guide rod 4 can be frustum-shaped or multi-faceted. In this embodiment, it is preferably frustum-shaped. The first embedding hole 12 and the third embedding hole 14 are both rectangular. The large end is in clearance fit with the first embedding hole 12, and the part of the light guide rod 4 located in the third embedding hole 14 is in clearance fit with the third embedding hole 14.

[0033] For ease of installation, the top corners of the first embedding hole 12 and the third embedding hole 14 are chamfered outwards, and the second embedding hole 13 is a round hole. The cross-section of the light guide rod 4 near the small end is inserted into the round hole. The chamfered process holes combined with the round hole facilitate the insertion and removal of the light guide rod 4. Because the small end is relatively small, it is more convenient to directly open the round hole on the base plate 3.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reference alignment prism light guide structure for a UV light source, characterized in that, Includes the light panel (7) and the light guide assembly; An array of multiple UV LED beads (5) is installed on the lamp panel (7), and pressure strips (6) are also installed on the staggered array of UV LED beads (5); The light guide assembly includes a dark box and an array of multiple frustum-shaped light guide rods (4) set inside the dark box and limited by the dark box; the top and bottom of the dark box are respectively provided with a first embedding hole (12) and a second embedding hole (13) corresponding to the light guide rods (4); the light guide rods (4) are vertically inserted into the first embedding hole (12) and the second embedding hole (13) and the small end of the light guide rods (4) is facing the UV LED beads (5); The dark box has L-blocks (8) on its left and right sides respectively. The L-blocks (8) include a horizontal part and a vertical part. The dark box is installed on the vertical part by means of the first fastener, which can be adjusted up and down. The horizontal part is installed on the pressure strip (6) by means of the second fastener, which can be adjusted back and forth. Tightening the first fastener will fix the L-blocks (8) relative to the light guide assembly. Loosening the first fastener will adjust the vertical height of the light guide assembly. Tightening the second fastener will fix the L-blocks (8) relative to the pressure strip (6). Loosening the second fastener will align the light guide assembly horizontally so that the small end of the light guide rod (4) is facing the lamp bead.

2. The reference alignment prism light guide structure for a UV light source according to claim 1, characterized in that, The vertical part of the L-block (8) has a first elongated oval hole (9) in the vertical direction, and the horizontal part has a second elongated oval hole (10) in the front-back direction; the dark box has a first mounting hole corresponding to the first elongated oval hole (9), and the first fastener is inserted into the first elongated oval hole (9) and the first mounting hole at the same time; the pressure strip (6) has a second mounting hole corresponding to the second elongated oval hole (10), and the second fastener is inserted into the second elongated oval hole (10) and the second mounting hole at the same time; the left and right sides of the dark box have at least two L-blocks (8), or at least two first elongated oval holes (9) and at least two second elongated oval holes (10) distributed at intervals in the front-back direction are opened on the L-block (8).

3. The reference alignment prism light guide structure for a UV light source according to claim 2, characterized in that, The fastener is any one of screw, wing bolt or bolt with nut, and the first mounting hole and the second mounting hole are respectively provided with internal threads that mate with the fastener threads.

4. The reference alignment prism light guide structure for a UV light source according to claim 1, characterized in that, There are two pressure strips (6), located on the left and right sides of the dark box and parallel to each other.

5. The reference alignment prism light guide structure for a UV light source according to claim 1, characterized in that, It also includes a fixing plate (11) set in the middle of the dark box and having multiple third embedding holes (14). The third embedding holes (14) correspond one-to-one with the light guide rod (4), and the middle part of the light guide rod (4) is embedded in the third embedding hole (14).

6. The reference alignment prism light guide structure for a UV light source according to claim 5, characterized in that, The light guide rod (4) is in the shape of a quadrangular frustum. The first embedding hole (12) and the third embedding hole (14) are both rectangular. The large end is in clearance fit with the first embedding hole (12), and the part of the light guide rod (4) located in the third embedding hole (14) is in clearance fit with the third embedding hole (14).

7. The reference alignment prism light guide structure for a UV light source according to claim 6, characterized in that, The cross-section of the light guide rod (4) is square, and the side is an isosceles trapezoid.

8. The reference alignment prism light guide structure for a UV light source according to claim 6, characterized in that, The top corners of the first embedded hole (12) and the third embedded hole (14) are respectively turned outwards as process holes. The second embedded hole (13) is a round hole. The cross-section of the light guide rod (4) near the small end is connected inside the round hole.

9. The reference alignment prism light guide structure for a UV light source according to claim 1, characterized in that, The dark box includes a support frame (1), a prism mask cover (2) which is provided at the top opening of the support frame (1) and has the first embedding hole (12), and a base plate (3) which is provided at the bottom opening of the support frame (1) and has the second embedding hole (13). The large end of the light guide rod (4) is embedded in the first embedding hole (12), and the small end is embedded in the second embedding hole (13). The centers of the first embedding hole (12) and the second embedding hole (13) are both located on the central axis of the light guide rod (4).

10. The reference alignment prism light guide structure for a UV light source according to claim 1, characterized in that, The LED array is rectangular, the light guide rod array is cuboid, and the dark box is adapted to the light guide rod array; or, the LED array is square, the light guide rod array is cubic, and the dark box is adapted to the light guide rod array.

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