Light source devices

Abstract

This application relates to a light source device. The light source device includes a base, a lens, and a light-emitting chip. The base has a groove, and the light-emitting chip is disposed in the groove. The lens is sealed and bonded to the front surface of the base with adhesive, and is positioned corresponding to the light-emitting chip. The adhesive covers the front surface of the base and part of the side surface of the lens, and extends inward to cover part of the sidewall of the groove. This light source device integrates the lens as part of the light source device by sealing and bonding the lens to the front surface of the base with adhesive. The connection and fit between the lens and the base is simple. The adhesive covering part of the front surface of the base and the side surface of the lens, as well as part of the sidewall of the groove, forms a hook-like structure after curing. Its external structure hooks the side surface of the lens, and its internal structure hooks the sidewall of the groove, significantly improving the stability and sealing of the connection between the lens and the base, and significantly reducing or avoiding the risk of the lens loosening or falling off.

Description

Technical Field

[0001] This application relates to the field of semiconductor light-emitting technology, and in particular to a light source device. Background Technology

[0002] Traditional light source devices typically use adhesive dispensing to encapsulate the light-emitting chip to form a primary lens. To achieve better luminous efficiency, a secondary lens is added to the light source device. Specifically, the light source device is mounted on a substrate, and then the secondary lens is clipped onto the substrate and covers the light source device, so that the optical portion of the secondary lens corresponds to that of the primary lens. Obviously, the fit between the secondary lens and the substrate is complex and carries the risk of loosening or detachment. Summary of the Invention

[0003] Therefore, it is necessary to provide a light source device that addresses the problem of complex mating structures between the secondary lens and the substrate in traditional light source devices, which pose a risk of loosening and detachment.

[0004] A light source device, comprising:

[0005] The base has a groove.

[0006] A light-emitting chip, wherein the light-emitting chip is disposed in the groove; and

[0007] The lens is sealed and bonded to the front surface of the base with adhesive and is positioned corresponding to the light-emitting chip;

[0008] The adhesive covers the front of the base and part of the side of the lens, and extends inward to cover part of the sidewall of the groove.

[0009] In one embodiment, the back of the lens has a non-functional area connected to the side of the lens, and an adhesive overflow groove is formed on the back of the lens, the adhesive overflow groove being surrounded by the non-functional area; the non-functional area is located on the front of the base, and the adhesive covers at least a portion of the outer wall of the adhesive overflow groove.

[0010] In one embodiment, the connection between the outer wall of the overflow groove and the non-functional area is rounded or chamfered.

[0011] In one embodiment, the back of the lens is provided with a light-receiving portion, which is formed by surrounding the adhesive overflow groove and inserted into the groove.

[0012] In one embodiment, the light source device further includes a light-transmitting adhesive layer that fills the groove and covers at least a portion of the light-incident portion.

[0013] In one embodiment, the adhesive has an overflow portion that overflows into the groove and the overflow channel, and the light-transmitting adhesive layer covers at least a portion of the overflow portion.

[0014] In one embodiment, the non-functional area covers a portion of the front of the base, giving the front of the base an outer region that surrounds the lens.

[0015] In one embodiment, the lens has a plurality of protrusions on its side, each of the protrusions being spaced apart from the outer region, and the adhesive is used to bond at least a portion of the back side of the protrusions along the side of the lens.

[0016] In one embodiment, the lens includes a base and a light-emitting part. The base is bonded to the front surface of the base, and the light-emitting part is disposed on the front surface of the base. Each of the protrusions is disposed on the side surface of the base, and the front surface of each protrusion is flush with or on the same plane as the front surface of the base.

[0017] In one embodiment, the side of the lens extends outward relative to the outer edge of the front of the base.

[0018] The aforementioned light source device integrates the lens into the light source device by sealing and bonding it to the front of the base with adhesive. This replaces the traditional secondary lens and eliminates the need for a secondary lens to be clipped onto the substrate, achieving the same light effect. The connection between the lens and the base is simple. The adhesive covers the front of the base, the side of the lens, and extends inward to cover part of the side wall of the groove. This creates a hook-like structure after the adhesive has cured. The outer structure hooks the side of the lens, and the inner structure hooks the side wall of the groove. This significantly improves the stability and sealing of the connection between the lens and the base, and significantly reduces or avoids the risk of the lens loosening or falling off. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a light source device in one embodiment of this application.

[0020] Figure 2 for Figure 1 A cross-sectional view of the light source device.

[0021] Figure 3 for Figure 1 A schematic diagram of the lens structure of the light source device.

[0022] Figure 4 This is a schematic diagram of the structure of the light source device in another embodiment of this application.

[0023] Figure 5 for Figure 4 A cross-sectional view of the light source device.

[0024] Figure 6 for Figure 4 A schematic diagram of the lens structure of the light source device.

[0025] Figure 7 This is a cross-sectional view of a light source device in another embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 - Light source device; 110 - Base; 111 - Mounting surface; 112 - External area; 113 - Internal area; 114 - Groove; 115 - Electrode structure; 116 - Support structure; 117 - First electrode; 118 - Second electrode; 120 - Lens; 121 - Base; 122 - Light emitting part; 123 - Light entering part; 124 - Non-functional area; 125 - Glue overflow groove; 126 - Outer wall; 127 - Inner wall; 128 - Protrusion; 130 - Light-emitting chip; 140 - Adhesive; 142 - Inner overflow part; 150 - Cavity; 160 - Transmitting adhesive layer. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] Please see Figures 1 to 3 , Figure 1 A schematic diagram of the structure of a light source device in one embodiment of this application is shown. Figure 2 It shows Figure 1 A cross-sectional view of the light source device. Figure 3 It shows Figure 1A schematic diagram of the lens structure of a light source device is provided in one embodiment of this application. The light source device 100 includes a base 110, a lens 120, and a light-emitting chip 130. The base 110 has a groove 114. The lens 120 is sealed and bonded to the front surface of the base 110 by adhesive 140 and is positioned corresponding to the light-emitting chip 130. The adhesive 140 covers the front surface of the base 110 and part of the side surface of the lens 120, and extends inward to cover part of the sidewall of the groove 114.

[0035] The lens 120 is sealed and bonded to the front of the base 110 using adhesive 140, thus integrating the lens 120 as part of the light source device 100. This replaces the traditional secondary lens. The connection between the lens 120 and the base 110 is simple. The adhesive 140 covers the front of the base 110, bonds to the side of the lens 120, and extends inward to cover part of the sidewall of the groove 114. This creates a hook-like structure after the adhesive 140 has cured. Its outer structure hooks onto the side of the lens 120, and its inner structure hooks onto the sidewall of the groove 114, significantly improving the stability and sealing of the connection between the lens 120 and the base 110. This significantly reduces or eliminates the risk of the lens 120 loosening or falling off. Moreover, since the light source device 100 integrates the lens 120, there is no need to attach a secondary lens to the substrate as in traditional technology. While meeting the same light efficiency requirements, its structure is greatly simplified, its size is significantly reduced, and its cost is lower.

[0036] The front side of the base 110 is its mounting surface 111, which mates with a corresponding area on the back side of the lens 120 to support the lens 120. The lens 120 is sealed and bonded to the mounting surface 111 by adhesive 140, forming a closed cavity 150 with the base 110. The light-emitting chip 130 is disposed in the groove 114 of the base 110, located in the cavity 150, and is correspondingly positioned to the lens 120.

[0037] The base 110 is a bracket or a cup, and has a built-in groove 114. A mounting surface 111 is formed on the front of the bracket, and the groove 114 is surrounded by the mounting surface 111, forming at least a portion of the cavity 150. A light-emitting chip 130 is disposed at the bottom of the groove 114. It should be noted that the cavity 150 can be formed entirely by the groove 114 or by a combination of the groove 114 and a slot within the lens 120.

[0038] Furthermore, the base 110 includes an electrode structure 115 and a support structure 116. The support structure 116 is disposed on the electrode structure 115, forming a groove 114. The mounting surface 111 is the front side of the support structure 116, and the electrode structure 115 extends outward in one direction from opposite sides of the support structure 116. The extended electrode structure 115 helps to increase the heat dissipation area, thereby improving the heat dissipation effect, and also increases the welding area of ​​the electrode, thereby improving the welding stability. In an alternative embodiment, the base 110 may include a substrate and a dam disposed on the substrate. The dam and the substrate form a groove 114, wherein the substrate is provided with pads to realize the electrical connection between the substrate and the light-emitting chip 130.

[0039] Furthermore, the support structure 116 is injection molded onto the electrode structure 115, wherein the electrode structure 115 includes a first electrode 117 and a second electrode 118 spaced apart. When the support structure 116 is injection molded, the support structure 116 fills the gap between the first electrode 117 and the second electrode 118, thereby isolating the two.

[0040] The light-emitting chip 130 can be, but is not limited to, an LED chip, and is a vertical chip. An LED chip is disposed within a groove 114, with its back electrode bonded to a first electrode 117, and its front electrode connected to a second electrode 118 via a bonding wire (not labeled). In alternative embodiments, the light-emitting chip 130 can be a horizontal chip or a flip chip; the number of light-emitting chips 130 is at least two. For example, two LED chips are disposed within a groove 114, with the center line of the lens 120 corresponding to the geometric centers of the two LED chips, and the two LED chips emitting the same or different colors; or, three LED chips are disposed within a groove 114, with the center line of the lens 120 corresponding to the geometric centers of the three light-emitting chips 130, and the three LED chips emitting the same or different colors. When the three LED chips emit different colors, any one of the three LED chips can be controlled to emit light to achieve monochromatic light emission.

[0041] The lens 120 includes a base 121 and a light-emitting part 122. The base 121 is bonded to the mounting surface 111, and the light-emitting part 122 is disposed on the front side of the base 121. The back side of the lens 120 is the back side of the base 121. The light emitted by the light-emitting chip 130 enters the light-emitting part 122 through the base 121 and is then emitted from the light-emitting surface of the light-emitting part 122, thereby controlling the light.

[0042] The lens 120 has a non-functional area 124 on its back side, which is connected to the side of the lens 120. An adhesive overflow groove 125 is formed on the back side of the lens 120, surrounded by the non-functional area 124. The non-functional area 124 is located on the front side of the base 110, and adhesive 140 covers at least a portion of the outer wall 126 of the adhesive overflow groove 125. When bonding the lens 120, the adhesive 140 is squeezed and flows inward. The adhesive overflow groove 125 can contain the overflowing adhesive 140, and the adhesive 140 simultaneously bonds to a portion of the outer wall 126 of the adhesive overflow groove 125, thereby increasing the coverage area of ​​the adhesive 140, which in turn increases the bonding area between the lens 120 and the base 110, further improving the mounting stability and sealing of the lens 120. The internal structure of the cured adhesive 140 simultaneously hooks onto the side wall of the groove 114 and the outer side wall 126 of the overflow groove 125.

[0043] In order to better guide the inwardly flowing adhesive 140 into the overflow trough 125, the connection between the outer wall 126 of the overflow trough 125 and the non-functional area 124 is rounded or chamfered. When the adhesive 140 flows through the rounded or chamfered part, its flow resistance is smaller, and it is easier to flow into the overflow trough 125 and be contained in the overflow trough 125.

[0044] It should be noted that while the adhesive 140 flows inward along the outer wall 126 of the overflow groove 125, it also flows inward along the side wall of the groove 114, covering part of the side wall of the groove 114. This increases the bonding area of ​​the adhesive 140, making the cured adhesive 140 have an overall "I"-shaped snap-fit ​​structure. Its outer structure hooks the side wall of the base 121, and its inner structure hooks the side wall of the groove 114 and the outer wall 126 of the overflow groove 125. The connection between the lens 120 and the base 110 is more stable and the connection is better sealed.

[0045] The non-functional area 124 on the back of lens 120 covers part of the front surface of base 110, leaving an uncovered outer area 112 on the front surface of base 110. That is, mounting surface 111 has an outer area 112, which is exposed relative to lens 120 and surrounds lens 120. Adhesive 140 covers mounting surface 111 and a portion of the side surface of lens 120. It should be noted that the exposure of the "outer area 112" is relative to lens 120; in fact, it is covered by adhesive 140. Obviously, mounting surface 111 also has an inner area 113, which is not exposed relative to lens 120, i.e., completely covered by lens 120. The outer area 112 surrounds the inner area 113.

[0046] When bonding the lens 120, adhesive 140 is usually first applied to the front side of the base 110. Since the lens 120 only covers the inner area 113, the compressed adhesive 140 easily flows along the side of the base 121 and covers part of the side of the base 121.

[0047] The back of the lens 120 has a light-receiving portion 123, which is formed by an adhesive overflow groove 125 and inserted into a recess 114. Clearly, the side of the light-receiving portion 123 is the inner wall 127 of the adhesive overflow groove 125, simplifying the structural arrangement of the back of the lens 120. Because the light-receiving portion 123 is inserted into the recess 114, the distance between the end face of the light-receiving portion 123 and the light-emitting chip 130 is reduced. With the same area, the end face of the light-receiving portion 123 can receive more light from the light-emitting chips 130. It can be understood that the end face area of ​​the light-receiving portion 123 is larger than the front area of ​​all the light-emitting chips 130.

[0048] Furthermore, the inner wall 127 of the adhesive overflow groove 125 is tapered in the direction toward the light-emitting chip 130. The light emitted by the light-emitting chip 130 enters the lens 120 through the light-incident section 123. When the large-angle lateral light rays in the lens 120 hit the inner wall 127, they undergo total internal reflection and enter the light-emitting section 122, and finally exit from the light-emitting surface of the light-emitting section 122, thereby improving the light-emitting efficiency and brightness of the light source device 100.

[0049] Combination Figure 3 The light-incident portion 123 is generally frustoconical in shape, protruding towards the light-emitting chip 130 relative to the bottom of the adhesive overflow groove 125. Its end closer to the light-emitting chip 130 is smaller, and the other end is larger. The end face of the light-incident portion 123 protrudes relative to the non-functional area 124. In an alternative embodiment, the light-incident portion 123 may be frustoconical in shape.

[0050] Furthermore, the light-emitting surface of the light-emitting portion 122 is a convex curved surface, which serves to focus the light and improve the luminous brightness of the light source device 100. Overall, the light-emitting portion 122 approximates a semi-ellipsoid, and its light-emitting surface is an ellipsoid. In other embodiments, the light-emitting surface of the light-emitting portion 122 can be configured in other shapes, such as a concave curved surface.

[0051] The lens 120 can be made of, but is not limited to, silicone, and has good light transmittance and moldability. The base 121 and the light-emitting part 122 of the lens 120 are integrally formed by injection molding.

[0052] It should be noted that when assembling the light source device 100, die bonding and wire bonding can be performed first in the groove 114 of the base 110. Then, adhesive 140 is applied to the mounting surface 111 of the base 110, covering the mounting surface 111. Finally, the lens 120 is aligned with the light-emitting chip 130, and the non-functional area 124 of the lens 120 is attached to the mounting surface 111. The adhesive 140 is squeezed and flows, bonding part of the side of the base 121, and simultaneously flowing into the overflow groove 125 and the groove 114.

[0053] Please see Figures 4 to 6 , Figure 4 A schematic diagram of the structure of a light source device according to another embodiment of this application is shown. Figure 5 It shows Figure 4 A cross-sectional view of the light source device. Figure 6 It shows Figure 4 A schematic diagram of the lens structure of the light source device is shown. Compared with the lens 120 of the light source device 100 in the above embodiment, the lens 120 of the light source device 100 in this embodiment has a plurality of protrusions 128 on its side. Each protrusion 128 is spaced apart from the outer region 112 of the mounting surface 111. Adhesive 140 adheres to at least a portion of the back side of the protrusion 128 along the side of the lens 120. When adhering the lens 120, the adhesive 140 flows along the side of the lens 120, flows to the back side of the protrusion 128, and adheres to the back side of the protrusion 128, further enhancing the connection strength of the lens 120 on the base 110.

[0054] During the fabrication of the light source device 100, the bump 128 is formed by pre-reserving connecting ribs between adjacent lenses 120, that is, by cutting off the middle part of the connecting rib and retaining both ends to form the bump 128. When the adhesive 140 is excessive and adheres to most of the back side of the connecting rib, the adhesive 140 on the back side is cut off while the middle part of the connecting rib is cut off to prevent the adhesive 140 from adhering to the connecting rib and causing the cut connecting rib to be unable to fall off.

[0055] Furthermore, each protrusion 128 is provided on the side of the base 121, and the front of each protrusion 128 is flush with or on the same plane as the front of the base 121. Under the same thickness, the distance between the protrusion 128 and the mounting surface 111 is larger. Due to the larger distance, more adhesive 140 can be accommodated, increasing the bonding area of ​​adhesive 140 on the back of the protrusion 128. Moreover, it provides a larger cutting space when cutting the connecting rib, making it easier to remove the middle part of the connecting rib and process the protrusion 128.

[0056] The base 121 of the lens 120 can be, but is not limited to, square, and each of its four sides is provided with a protrusion 128. Obviously, the four sides of the base 121 are connected to the base 121 of other lenses 120s by connecting ribs. In other embodiments, the base 121 can be circular, and the number of protrusions 128 can be two, four, or more.

[0057] The light source device 100 also includes a light-transmitting adhesive layer 160, which fills the groove 114 and covers at least a portion of the light-receiving part 123. The light-transmitting adhesive layer 160 covers the light-emitting chip 130, which can reduce the Fresnel loss of the light-emitting chip 130, which is beneficial to improve the light extraction rate of the light-emitting chip 130, and at the same time improves the airtightness of the bottom of the base 110.

[0058] When assembling lens 120, light-transmitting adhesive is first filled into groove 114 until it completely fills the groove. Then, lens 120 is bonded, with the light-incident portion 123 of lens 120 inserted into the light-transmitting adhesive. This squeezes the light-transmitting adhesive in groove 114. At this time, the overflow groove 125 can contain the overflowing light-transmitting adhesive and internal air, preventing the light-transmitting adhesive from overflowing due to overfilling and avoiding air bubbles from mixing into the light-transmitting adhesive and affecting optical performance. After the light-transmitting adhesive cures into light-transmitting adhesive layer 160, the light-transmitting adhesive layer 160 not only fills groove 114 but also fills at least part of overflow groove 125, and bonds with light-incident portion 123 and adhesive 140. This also strengthens the connection between lens 120 and base 110, further optimizing the stability of the connection between the two, and forming multiple airtight structures from the outside in, significantly improving the airtightness of light-emitting chip 130.

[0059] The adhesive 140 has an overflow portion 142 that overflows into the groove 114 and the overflow groove 125. The light-transmitting adhesive layer 160 covers at least a portion of the overflow portion 142. That is, the light-transmitting adhesive layer 160 is connected to the overflow portion 142. It can be regarded as the light-transmitting adhesive layer 160 is indirectly connected to the lens 120, forming a multi-layer connection structure and an airtight structure.

[0060] Furthermore, the light-transmitting adhesive layer 160 covers a portion of the overflow portion 142. However, in other embodiments, the light-transmitting adhesive layer 160 completely covers the overflow portion 142, while at the connection between the lens 120 and the base 110, the outer structure of the adhesive 140, the middle portion of the adhesive 140, the overflow portion 142, and the light-transmitting adhesive layer 160 are formed sequentially from the outside to the inside. The resulting multi-layer connection structure and airtight structure improve the airtightness and stability of the connection.

[0061] As for the other aspects of the light source device 100 in this embodiment, they are basically the same as the other aspects of the light source device 100 in the above embodiments. The specific contents can be referred to the description of the above embodiments, and will not be repeated here.

[0062] Please see Figure 7 , Figure 7 A cross-sectional view of a light source device in another embodiment of this application is shown. Compared to the lens 120 of the light source device 100 in the above embodiments, the side of the lens 120 of the light source device 100 in this embodiment extends outward relative to the outer edge of the front surface of the base 110, that is, the side of the lens 120 extends outward relative to the side of the support structure 116. The adhesive 140 also covers a portion of the side of the lens 120. Clearly, the non-functional area 124 of the lens 120 completely covers the front surface of the base 110, extending beyond the outer edge of the mounting area 111, thus increasing the contact area between the two and improving the stability and airtightness of the connection between them.

[0063] As for the other aspects of the light source device 100 in this embodiment, they are basically the same as the other aspects of the light source device 100 in the above embodiments. The specific contents can be referred to the description of the above embodiments, and will not be repeated here.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light source device, characterized by comprising: include: A base (110) is provided with a groove (114); A light-emitting chip (130) is disposed in the groove (114); and Lens (120), the lens (120) is sealed and bonded to the front of the base (110) by adhesive (140), and is disposed corresponding to the light-emitting chip (130); The adhesive (140) covers the front of the base (110) and part of the side of the lens (120), and extends inward to cover part of the sidewall of the groove (114).

2. The light source device according to claim 1, characterized in that, The lens (120) has a non-functional area (124) on its back side, the non-functional area (124) being connected to the side of the lens (120), and an overflow groove (125) is provided on the back side of the lens (120), the overflow groove (125) being surrounded by the non-functional area (124). The non-functional area (124) is located on the front side of the base (110), and the adhesive (140) covers at least a portion of the outer wall (126) of the adhesive overflow groove (125).

3. The light source device according to claim 2, characterized by The connection between the outer wall (126) of the overflow groove (125) and the non-functional area (124) is rounded or chamfered.

4. The light source device according to claim 2, wherein The lens (120) has a light-incident portion (123) on its back side, which is formed by the overflow groove (125) and inserted into the groove (114).

5. The light source device according to claim 4, characterized by Also includes: A light-transmitting adhesive layer (160) fills the groove (114) and covers at least a portion of the light-incident portion (123).

6. The light source device according to claim 5, wherein The adhesive (140) has an overflow portion (142) that overflows into the groove (114) and the overflow groove (125), and the light-transmitting adhesive layer (160) covers at least a portion of the overflow portion (142).

7. The light source device according to any one of claims 2 to 6, wherein The non-functional area (124) covers a portion of the front of the base (110), thereby giving the front of the base (110) an outer region (112) that surrounds the lens (120).

8. The light source device according to claim 7, characterized by The lens (120) has a plurality of protrusions (128) on its side, each of the protrusions (128) being spaced apart from the outer region (112), and the adhesive (140) is used to bond at least a portion of the back side of the protrusions (128) along the side of the lens (120).

9. The light source device according to claim 8, characterized in that, The lens (120) includes a base (121) and a light-emitting part (122). The base (121) is bonded to the front surface of the base (110), and the light-emitting part (122) is disposed on the front surface of the base (121). Each of the protrusions (128) is provided on the side of the base (121), and the front of each of the protrusions (128) is flush with or on the same plane as the front of the base (121).

10. The light source device according to any one of claims 1 to 6, wherein The side of the lens (120) extends outward relative to the outer edge of the front of the base (110).

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