High-uniformity and high-luminous-efficiency curing light source device

Abstract

The utility model relates to a high-uniformity high-luminous-efficiency curing light source device which comprises a light source base used for bearing a curing light source device. The curing light source module is arranged on the light source base, and the curing light source module comprises an LED light source module fixed above the light source base, a collimating lens module arranged above the LED light source module and a dodging lens module arranged above the collimating lens module; the LED light source module is provided with a plurality of LED lamps, the LED lamps are arranged in a rectangular-ambulatory-plane array or a U-shaped array, and the LED lamps are arranged unevenly; the collimating lens module is provided with a plurality of collimating lenses, and the LED lamps are in one-to-one correspondence with the collimating lenses; and the light source shell covers the curing light source module and is connected to the light source base. The LED curing device has the advantages of being high in LED light utilization rate, uniform in irradiation light, good in curing effect, high in curing efficiency, capable of working continuously and stably for a long time and the like.

Description

Technical Field

[0001] The utility model relates to the field of ultraviolet curing light sources, in particular to a high-uniformity and high-light-efficiency curing light source device. Background Art

[0002] At present, in the design of products such as mobile phones and tablet computers, more and more non-metallic materials such as polymer materials and glass materials (such as resins, glass, and ceramics) are applied to their structural components, and a large number of gluing links are required in the production and assembly process. The gluing link needs to go through a series of processes such as glue coating and bonding, drying and curing, and cooling. Under natural conditions, this process takes a long time, and the curing time of the gluing material can even be up to dozens of minutes. In order to shorten the gluing time to achieve the purpose of mass production, there is an urgent need for an ultraviolet curing light source with good curing uniformity.

[0003] The existing ultraviolet curing light sources mainly adopt two arrangement methods: one method is the simple array arrangement of LEDs. Such an arrangement requires a large number of LEDs, and the light of the LEDs diverges severely, resulting in low light utilization rate and low irradiation intensity in the radiation area. Another method is to add a cylindrical or semi-cylindrical light condensing rod in front of the LED. Compared with the first scheme, the light utilization rate is slightly improved, but the overall uniformity of the irradiation area is very poor, resulting in uneven curing of the irradiated surface. The existing LED lamp arrangement methods are difficult to achieve high radiation intensity and uniform illumination in the effective irradiation area for irregular glue shapes in products, such as a zigzag shape or a U-shaped glue path. This leads to uneven curing and incomplete curing on the surface of the glue.

[0004] Therefore, it is an urgent problem to design a high-uniformity and high-light-efficiency curing light source. Content of the Utility Model

[0005] To solve the deficiencies of the existing technology, the present application provides a high-uniformity and high-light-efficiency curing light source device with high radiation uniformity and large irradiation light energy utilization rate. The device specifically includes:

[0006] A light source base for carrying the curing light source device;

[0007] A curing light source module, which is arranged on the light source base. The curing light source module includes an LED light source module fixed above the light source base, a collimating lens module arranged above the LED light source module, and a light homogenizing lens module arranged above the collimating lens module; the LED light source module has a plurality of LED lights, and the LED lights are arranged in a zigzag array or a U-shaped array, and the LED lights are unevenly arranged; the collimating lens module has a plurality of collimating lenses, and the LED lights correspond to the collimating lenses one by one;

[0008] A light source housing, which covers the curing light source module and is connected to the light source base.

[0009] More specifically, the LED lights in the LED light source module are composed of the LED lights in the arc region and the LED lights in the straight-edge region. The straight-edge region is composed of several adjacent sub-regions. The LED lights in the sub-regions are evenly arranged, and the spacing of the evenly arranged LED lights in different sub-regions is different.

[0010] More specifically, the straight-edge region of the LED light source module includes a first straight-edge region and a second straight-edge region. The length of the first straight-edge region is less than that of the second straight-edge region. The LED lights in the first straight-edge region are evenly arranged. The second straight-edge region is divided into a first sub-region and two second sub-regions. The first sub-region is located between the two second sub-regions. The spacing of the evenly arranged LED lights in the first sub-region is different from the spacing of the evenly arranged LED lights in the second sub-region.

[0011] More specifically, the LED lights in the arc region of the LED light source module are evenly arranged at equal radian intervals.

[0012] More specifically, the LED lights in the arc region of the LED light source module are unevenly arranged.

[0013] More specifically, the LED light source module is composed of several light source sub-modules, and the light source parameters of each light source sub-module can be independently adjusted.

[0014] More specifically, the collimating lens module is a Fresnel lens module, and the light homogenizing lens module is a compound eye lens module.

[0015] More specifically, the collimating lens module is a convex lens module, and the light homogenizing lens module is a stripe lens module.

[0016] More specifically, the collimating lens module is a TIR lens module, and the light homogenizing lens module is a compound eye lens module.

[0017] More specifically, an anti-reflection film is provided on the surface of the collimating lens in the collimating lens module and on the surface of the light homogenizing lens in the light homogenizing lens module.

[0018] More specifically, the side of the light homogenizing lens module close to the collimating lens module is the lens surface, and the side far from the collimating lens module is the smooth surface.

[0019] More specifically, a heat dissipation module is provided in the light source base, and the heat dissipation module is used to cool the solidified light source module.

[0020] More specifically, the light source housing includes an outer housing and an inner housing. The outer housing is disposed outside the light homogenizing lens module and partially covers the surface of the curing light source module, and the inner housing is nested inside the light homogenizing lens module.

[0021] More specifically, the heat dissipation module is a cooling water channel heat dissipation module or a heat dissipation fan heat dissipation module

[0022] The beneficial effects of the present utility model are as follows:

[0023] 1. In this application, the uneven arrangement of the LED lights makes the irradiation uniformity at each site in the device higher, the change in radiation illuminance smaller, the curing effect of the device on the glue path better, and the curing efficiency higher.

[0024] 2. This application designs three different combinations of collimating lenses and light homogenizing lenses. All three combinations have excellent irradiation uniformity, high utilization rate of LED light, and good irradiation uniformity within the region.

[0025] 3. A heat dissipation module is provided inside the light source base to enhance the overall heat dissipation of the device. This device can work continuously and stably for a long time and is suitable for application in large-scale production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an exploded schematic view of the high-uniformity and high-light-efficiency curing light source device in this application;

[0027] Figure 2 is a three-dimensional schematic view of the high-uniformity and high-light-efficiency curing light source device in this application;

[0028] Figure 3 is a structural schematic view of the curing light source module in this application;

[0029] Figure 4 is a schematic diagram of the light path for collimating and homogenizing light by the curing light source module in this application;

[0030] Figure 5 is a schematic layout diagram of the LED light source module in this application;

[0031] Figure 6 is a schematic diagram of the regional distribution of the LED lights in this application;

[0032] Figure 7 is a three-dimensional schematic view of the TIR lens module in this application;

[0033] Figure 8 is a bottom view of the Fresnel lens module in this application;

[0034] Figure 9 is a schematic diagram of a single Fresnel lens in this application;

[0035] Figure 10It is the bottom view of the convex lens module in this application;

[0036] Figure 11 It is the front view of the convex lens module in this application;

[0037] Figure 12 It is the schematic diagram of the compound eye lens in this application;

[0038] Figure 13 It is the schematic diagram of the grating lens in this application.

[0039] In the figure: 1. Light source base; 2. LED light source module; 21. LED lamp; 3. Collimating lens module; 31. TIR lens; 32. Fresnel lens; 33. Convex lens; 4. Light homogenizing lens module; 41. Compound eye lens module; 42. Grating lens module; 5. Embedded shell; 6. Outer protective shell; 7. Cooling water inlet; 8. Cooling water outlet. Detailed implementation manners

[0040] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0043] As Figure 1Exploded view of the device shown. The curing light source device designed in this application includes: a light source base 1 for carrying the curing light source device. An installation hole and a terminal post are provided inside the light source base 1. The curing light source module is arranged on the light source base 1. With the light source base 1 at the bottommost, the curing light source module includes, from bottom to top in sequence: an LED light source module 2, a collimating lens module 3, and a light homogenizing lens module 4 that are aligned with each other. The specific alignment relationship is as shown in Figure 3 shown. The light source housing covers the curing light source module and is connected to the light source base 1. The light source housing further includes an outer housing 6 and an inner embedded housing 5. The inner embedded housing 5 is nested inside the light homogenizing lens module 4, and the outer housing 6 is installed and fixed outside the light homogenizing lens module 4. When the curing light source device is assembled, the structure is as shown in Figure 2 shown. This device is mainly used for curing the glue path in electronic products. Usually, the light emitted by an LED lamp is unevenly diffused. Directly using it for glue curing often cannot effectively utilize all the light. And due to the strong diffusion effect and uneven light, it is easy to cause the situation that some areas are irradiated too strongly and some areas are irradiated too weakly, resulting in uneven glue curing and affecting the product quality. Directly using an LED lamp for curing not only has a low light utilization rate but also the glue curing uniformity is not ideal. As shown in Figure 4 shown, this device is provided with a collimating lens module 3 on the LED light source module 2 to collimate the diffused light, greatly improving the light utilization rate. A light homogenizing lens module 4 is arranged behind the collimating lens module 3 to homogenize the collimated light and improve the curing effect on the glue. When the device is in use, it is fixed above the product to be cured, so that the light homogenizing lens module 4 is aligned with the glue path of the product to be cured below. After the device is turned on, the glue path can be cured uniformly and efficiently.

[0044] Among them, the LED light source module is that LED lamps are arranged on a PCB board. The material of the PCB board can be an aluminum substrate or a copper substrate. Preferably, a copper substrate with better thermal conductivity is selected. Positioning holes and screw mounting holes are provided on the copper substrate. The copper substrate is fixed on the light source base 1 by screws. The specification size of the LED can be replaced according to actual needs. Preferably, an LED lamp with a size of 1*1 mm and a central wavelength of 465 - 485 nm is used. LED lamps with a central wavelength of 365 nm, 385 nm, 395 nm, 405 nm, or other visible light bands can also be selected. The arrangement of the LED lamps on the PCB board needs to be adjusted according to the path of the glue path to be cured. This device is mainly used for curing the glue path in electronic products. The glue path is mainly in a loop shape or a U shape. In the following specific embodiments, the loop-shaped arrangement as shown in Figure 5 shown is taken as an example.

[0045] The LED light source module 2 is composed of several light source sub-modules. In some specific embodiments, the meandering PCB board is composed of 12 sub-PCB boards. Each sub-PCB board and the LED lights installed thereon form a light source sub-module. As Figure 6 shown, the A, B, C, D, and E regions correspond to 5 of the sub-PCB boards. The light source parameters of each sub-PCB board can be adjusted separately (such as the magnitude of the current, etc.). The user can set the power parameters of each sub-PCB board according to actual needs to obtain a more uniform irradiation and curing effect, or a stronger / weaker irradiation and curing effect in a certain region. The number of sub-PCB boards can also be 2, 4, 6, 8, 10 or other numbers. The distribution of the sub-PCB boards can also be other symmetric distribution forms. For example, when the PCB board is composed of 12 sub-PCB boards, the distribution of the sub-PCB boards can also be such that each of the four straight sides contains 2 sub-PCB boards and each arc region contains 1 sub-PCB board.

[0046] To obtain a more uniform light intensity, the LED lights are not evenly arranged on the PCB. In some specific embodiments, as Figure 6 shown, the meandering LED array is divided into five sub-regions A, B, C, D, and E. Each sub-region has several LED lights.

[0047] In a feasible implementation, the distance between the LED lights in regions A and C is 3.0 - 3.2 mm, the distance between the LED lights in region B is 3.2 - 3.4 mm, the distance between the LED lights in region E is 3.3 - 3.5 mm, and the distances between the 5 LED lights in the arc region D are 3.0 - 3.1 mm, 2 - 2.2 mm, 3.3 - 3.5 mm, 3.3 - 3.5 mm, and 3.0 - 3.2 mm in sequence.

[0048] In a feasible implementation, the distance between the LED lights in regions A and C is 3.0 - 3.2 mm; the distance between the LED lights in regions B and E is 3.1 - 3.3 mm; the distance between the LED lights in the arc region D is 2.5 - 3.4 mm.

[0049] In a feasible implementation, the distance between the LED lights in regions A, B, C, and E is 0.7 - 1.2 mm; the LED lights in the arc region D are arranged in a circular arc with a radius of 9 - 11 mm, the LED lights are evenly arranged, and the radian between the LED lights is 15 - 20°.

[0050] The uneven spacing between the LED lights is set to obtain a more uniform irradiation effect in the overall area. Since there are straight-edge areas and arc-shaped areas in the area, if the LED lights are evenly spaced, the irradiation intensity will be more uneven at the bending points of the arc-shaped area and the centers of the long straight areas. In some specific embodiments, the glue content in the glue path of the product to be cured may also be unevenly set. For example, a certain part of the glue path has more glue to obtain a stronger adhesion effect. At this time, the device can make an adaptive adjustment to reduce the spacing of the corresponding LED lights here to meet the needs of irradiation curing. To obtain a better irradiation curing effect, the LED lights are all aligned with the center position of the glue path route.

[0051] The distance between the LED light and the bottom of the collimating lens, and the distance between the top of the collimating lens and the light homogenizing lens can be adjusted according to actual needs. Preferably, a smaller spacing is used as much as possible. However, in order to avoid heat accumulation of the LED light and causing thermal damage to the collimating lens, they cannot be in direct contact and a certain gap needs to be left for heat dissipation. In some specific embodiments, the distance between the LED light-emitting surface in the LED light source module 2 and the bottom of the collimating lens is 0.1 mm, and the distance between the top of the collimating lens and the bottom of the light homogenizing lens is 1 - 1.5 mm. In some specific embodiments, the distance between the LED light-emitting surface in the LED light source module 2 and the bottom of the collimating lens is 2.1 - 2.4 mm, and the distance between the top of the collimating lens and the bottom of the light homogenizing lens is 0.3 - 0.5 mm.

[0052] In some specific embodiments, as Figure 7 shown, the collimating lens module 3 is a TIR lens module. The TIR lens is fixed on the support structure through a card slot. Each TIR lens corresponds to an LED light, and the spacing of the TIR lenses is adjusted according to the spacing of the LED lights, so that the light emitted by the LED is maximally received and collimated by the upper TIR lens. The TIR lens can be made of PMMA material or other common lens materials such as silicone material. When the collimating lens module 3 is a TIR lens module, the light homogenizing lens module 4 can be a stripe lens module or a fly-eye lens module. Preferably, a fly-eye lens module is adopted. The fly-eye lens module is as Figure 12 shown. The fly-eye lens module can be made of PC material or other common lens materials such as PMMA and silicone. It should be noted that the number of fly-eyes in the figure is only for illustration and should not be understood as a limitation of the solution. The actual number of fly-eyes can be increased according to the actual light homogenizing needs.

[0053] Performance tests were conducted on the above embodiments to measure the irradiance and irradiation uniformity of light at different positions. The actual test points were located 40 mm outside the position of the compound eye lens corresponding to the LED lamp. The arrangement of the LED lamps was as follows: the spacing between the LED lamps in regions A, B, C, and E was 0.7 - 1.2 mm; the LED lamps in the arc-shaped region D were arranged in a circular arc with a radius of 9 - 11 mm, and the LEDs were evenly distributed with a radian of 15 - 20° between adjacent LED lamps. A total of 10 test points were collected at the arc-shaped region and the straight-edge region positions. Finally, it was measured that the irradiation uniformity at different positions was greater than 94%, indicating excellent irradiation uniformity. The change in irradiance at different test points was small, and the curing light source device designed in this application had a high irradiation uniformity. In some specific embodiments, such as Figure 8 shown, the collimating lens module 3 was a Fresnel lens module. The Fresnel lens was fixed to the support structure through a card slot. A single Fresnel lens was as shown in Figure 9 shown. Each Fresnel lens corresponded to an LED lamp, and the spacing of the Fresnel lenses was adjusted according to the spacing of the LED lamps, so that the light emitted by the LED was maximally received and collimated by the upper Fresnel lens. When the collimating lens module 3 was a Fresnel lens module, the light homogenizing lens module 4 could be a stripe lens module or a compound eye lens module, and preferably a compound eye lens module was used.

[0054] In some specific embodiments, such as Figure 10 shown, the collimating lens module 3 was a convex lens module. The convex lens was fixed to the support structure through a card slot. The convex lens could be a double-sided convex lens or a single-sided convex lens. Here, a double-sided convex lens was taken as an example. The front view of the collimating lens module 3 when using a double-sided convex lens was as shown in Figure 11 shown. Each convex lens corresponded to an LED lamp, and the spacing of the convex lenses was adjusted according to the spacing of the LED lamps, so that the light emitted by the LED was maximally received and collimated by the upper convex lens. When the collimating lens module 3 was a convex lens module, the light homogenizing lens module 4 could be a stripe lens module or a compound eye lens module, and preferably a stripe lens module was used. The stripe lens module was as shown in Figure 13 shown. The direction of the stripes on the straight edges all pointed to the inside of the rectangle, and the structure in the four corner arc-shaped regions was similar to that of a compound eye. It should be noted that the number of stripes in the figure was only for illustration and should not be construed as a limitation of the solution. The actual number of stripes could be increased according to the actual light homogenizing requirements. The specific assembly structure was as shown in Figure 3 shown.

[0055] Performance tests were conducted on the above embodiments to measure the irradiance and irradiation uniformity of light at different positions. The actual test points were located 40 mm outward from the position of the compound eye lens corresponding to the LED lamp. The arrangement of the LED lamps was as follows: the distance between the LED lamps in regions A and C was 3.0 - 3.2 mm; the distance between the LED lamps in regions B and E was 3.1 - 3.3 mm; the distance between the LED lamps in the arc-shaped region D was 2.5 - 3.4 mm. A total of 10 test points were collected at the arc-shaped region and the straight-edge region positions. Finally, it was measured that the irradiation uniformity at different positions was greater than 93%, and the irradiation uniformity was excellent. The change in irradiance at different test positions was small. The curing light source device designed in this application has a very high irradiation uniformity. In some specific embodiments, to improve the overall radiation power of the light source, an anti-reflection film was coated on the surfaces of the collimating lens (convex lens, Fresnel lens, TIR lens) and the light homogenizing lens (compound eye lens, stripe lens). The light homogenizing lens module 4 is the side directly facing the glue. After long-term use, the organic volatiles in the glue may accumulate on the surface of the light homogenizing lens module 4. The accumulated organic matter will further adhere to dust and other debris in the working environment, which may affect the light transmittance to a certain extent. For the convenience of later cleaning, the side of the light homogenizing lens module 4 close to the collimating lens module 3 is the compound eye surface or the stripe surface, and the side away from the collimating lens module 3 is set as a smooth surface.

[0056] In some specific embodiments, a heat dissipation component is provided inside the light source base. The heat dissipation component can be a cooling water pipe arranged inside. The cooling water inlet 7 and the cooling water outlet 8 are as Figure 2 shown. The heat dissipation component can also be a fan for heat dissipation or other structures for cooling. There are a large number of LED lamp beads in the LED light source module. During long-term operation, it is easy to accumulate a large amount of heat. If the heat is not dissipated in time, some of the LED lamp beads may be damaged. Even due to the heat accumulation effect, the lenses in the collimating lens module and the light homogenizing lens module may be thermally deformed, affecting the light collimation and homogenization effect. Setting the heat dissipation component is beneficial to protecting the operation life of the device and the quality of the curing work. At the same time, ventilation slots can be provided in the side regions of the outer housing 6 and the inner housing 5 to increase the air circulation inside the device, which is beneficial to discharging heat in time.

[0057] The above has described the embodiments of the present invention in detail, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A high-uniformity and high-light-efficiency curing light source device, characterized in that, Including: A light source base for carrying a curing light source device; A curing light source module, which is arranged on the light source base. The curing light source module includes an LED light source module fixed above the light source base, a collimating lens module arranged above the LED light source module, and a light homogenizing lens module arranged above the collimating lens module. The LED light source module has a plurality of LED lights, and the LED lights are arranged in a rectangular array or a U-shaped array. The collimating lens module has a plurality of collimating lenses, and the LED lights correspond to the collimating lenses one by one; A light source housing, which covers the curing light source module and is connected to the light source base.

2. The solidification light source device according to claim 1, characterized in that, The LED lights in the LED light source module are composed of LED lights in an arc region and LED lights in a straight-edge region. The straight-edge region is composed of a plurality of adjacent sub-regions, and the LED lights are evenly arranged within the sub-regions. The spacing of the evenly arranged LED lights in different sub-regions is different.

3. The solidification light source device according to claim 2, characterized in that, The LED lights in the arc region of the LED light source module are evenly arranged at equal angles.

4. The solidification light source device according to claim 2, wherein The LED lights in the arc region of the LED light source module are not evenly arranged.

5. The solidification light source device according to claim 1, characterized in that, The LED light source module is composed of a plurality of light source sub-modules, and the light source parameters of each light source sub-module can be independently adjusted.

6. The solidification light source device according to claim 1, characterized in that The collimating lens module is selected from any one of a Fresnel lens module, a convex lens module, and a TIR lens module, and the light homogenizing lens module is a compound eye lens module or a stripe lens module.

7. The solidification light source device according to claim 1, characterized in that An anti-reflection film is provided on the surface of both the collimating lens and the light homogenizing lens.

8. The solidification light source device according to claim 1, wherein The side of the light homogenizing lens module close to the collimating lens module is a lens surface, and the side away from the collimating lens module is a smooth surface.

9. The solidification light source device according to claim 1, wherein The light source housing includes an outer housing and an inner embedded housing. The outer housing is arranged outside the light homogenizing lens module and partially covers the surface of the curing light source module, and the inner embedded housing is nested inside the light homogenizing lens module.

10. The solidification light source device according to claim 1, characterized in that, A heat dissipation module is arranged inside the light source base, and the heat dissipation module is used to cool the curing light source module.

11. The solidification light source device according to claim 10, wherein The heat dissipation module is a cooling water channel heat dissipation module or a heat dissipation fan heat dissipation module.

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