Lens group and camera module

Abstract

The utility model provides a lens group and a camera module, the lens group is configured on a substrate provided with a photosensitive element, the lens group comprises a lens barrel, and the lens barrel comprises an object side surface and a side wall extending from the object side surface to the substrate. The at least one lens and the at least one anti-dazzling screen are arranged in the lens barrel, and the bottom, close to the substrate, of the side wall of the lens barrel is provided with a ventilation notch. The camera module comprises a substrate, a photosensitive element and the lens group.

Description

Lens assembly and camera module Technical Field

[0001] This utility model relates to an optical device, and more particularly to a lens assembly and camera module. Background Technology

[0002] With the rapid development of technology, consumer electronics products are becoming miniaturized and thinner, and their camera modules are also trending towards miniaturization. Furthermore, with the advancement of image capture technology, the performance of image sensors has been improved and they can be made smaller.

[0003] The pursuit of lightweight design and maximized screen-to-body ratio in consumer electronics has significantly reduced the space and size of optical lenses within these products. Current imaging lens technology must consider both improved image quality and miniaturized design, as well as the functionalities required by customers. The design process involves material properties, yield rates, and assembly issues. The design of thin and wide-angle lenses is far more challenging than that of traditional lenses. Therefore, in the past, achieving a balance between these multiple requirements remained difficult.

[0004] An existing lens assembly is mounted on a substrate containing a photosensitive element. When the lens assembly is encapsulated on the substrate, it undergoes a high-temperature baking and thermosetting process, during which a sealed gas is present inside the lens assembly. Therefore, lens assemblies typically have vents on the object side of the lens barrel to expel this internal gas. However, as lenses become smaller and the need for lens concealment increases, vents on the object side of the lens barrel are now noticeable to users, failing to meet the aesthetic requirements of modern lens assembly designs. Summary of the Invention

[0005] This utility model relates to a lens assembly that overcomes the limitations of the lens barrel in terms of appearance and meets the requirements of the packaging process.

[0006] This utility model relates to a camera module that overcomes the limitations of the lens barrel in terms of appearance and meets the requirements of the packaging process.

[0007] This invention provides a lens assembly for mounting on a substrate with a photosensitive element. The lens assembly includes a lens barrel, which includes an object-side side and a sidewall extending from the object-side side towards the substrate. At least one lens and at least one light-shielding plate are disposed in the lens barrel, and the sidewall of the lens barrel has a venting notch near the bottom of the substrate.

[0008] In a lens assembly according to one embodiment of the present invention, the lens barrel includes a first part and a second part. The first part is a cylindrical structure, and the second part is a polygonal frame structure. The second part is located between the first part and the substrate, and one of the multiple sidewalls of the polygonal frame structure has a ventilation notch near the bottom of the substrate.

[0009] In one embodiment of the lens assembly of this utility model, the lens barrel structure includes a polygonal frame structure. The polygonal frame structure includes multiple sidewalls extending from the object side to the substrate, and one of the multiple sidewalls of the polygonal frame structure has a ventilation notch near the bottom of the substrate.

[0010] In one embodiment of the lens assembly of this utility model, the sidewall with the ventilation notch has a first side length W, the ventilation notch has a width x, and the lens assembly satisfies the relationship 0.01. <x / W<0.5。

[0011] In the lens assembly of this embodiment, the other sidewall adjacent to the sidewall with the ventilation notch has a second side length L, the ventilation notch has a width x, and the ratio of the width x of the ventilation notch to the second side length L of the other sidewall is 0.01. <x / L<0.5。

[0012] In a lens assembly according to one embodiment of this utility model, the sidewall with the ventilation opening has a first height H, the ventilation opening has a second height h, and the ratio of the second height h to the first height H is 0.03. <h / H<0.8。

[0013] A camera module according to an embodiment of the present invention includes a substrate, a photosensitive element, and the aforementioned lens assembly, wherein the photosensitive element is disposed on the substrate, and the lens assembly is disposed on the substrate and covers the photosensitive element.

[0014] Based on the above, in the lens assembly and camera module of the present invention, by setting the ventilation gap on the side wall near the bottom of the substrate, the gas generated in the packaging process can be discharged through the ventilation gap, and it is also easy to cover or seal the ventilation gap in subsequent processes. Moreover, the ventilation gap will not expose the object side of the lens barrel, thus taking into account both the aesthetic appearance and the need for venting in the process. Attached Figure Description

[0015] Figure 1A is a perspective view of a camera module according to a first embodiment of the present invention.

[0016] Figure 1B is a cross-sectional view of the camera module in Figure 1A cut along the optical axis.

[0017] Figure 1C is a perspective view of a lens assembly according to another embodiment of the first embodiment of the present invention.

[0018] Figure 2A is a perspective view of a camera module according to a second embodiment of the present invention.

[0019] Figure 2B is a cross-sectional view of the camera module in Figure 2A cut along the optical axis.

[0020] Figure 2C is a perspective view of a lens assembly according to another embodiment of the second embodiment of the present invention.

[0021] Figures 3A and 3B are schematic diagrams of the packaging of the lens assembly and the photosensitive element according to the first and second embodiments of the present invention. Detailed Implementation

[0022] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0023] Figure 1A is a perspective view of a camera module according to the first embodiment of this invention, and Figure 1B is a cross-sectional view of the camera module of Figure 1A cut along the optical axis. Figure 2A is a perspective view of a camera module according to the second embodiment of this invention, and Figure 2B is a cross-sectional view of the camera module of Figure 2A cut along the optical axis.

[0024] Referring to Figures 1A and 1B, the camera module 10A of this embodiment includes a substrate 100A, a photosensitive element S1, and a lens assembly 20. The photosensitive element S1 is disposed on the substrate 100A, and the lens assembly 20 is disposed on the substrate 100A and covers the photosensitive element S1. In this embodiment, the lens assembly 20 is disposed on the substrate 100A on which the photosensitive element S1 is located. The substrate 100A may be, for example, a printed circuit board, and the photosensitive element S1 may be, for example, a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) image sensor, but is not limited thereto. Furthermore, the lens assembly 20, the photosensitive element S1, and the substrate 100A can together form the camera module 10A. For example, the lens assembly 20 can be encapsulated on the substrate 100A using encapsulating adhesive 1, but is not limited thereto. The lens assembly 20 includes a lens barrel BR1, at least one lens 11 (multiple lenses 11 are used as an example in FIG. 1B), and at least one light-shielding plate 12 (multiple light-shielding plates 12 are used as an example in FIG. 1B). The lens barrel BR1 includes an object side surface A1 and a sidewall SW1 extending from the object side surface A1 toward the substrate 100A. The lens 11 is disposed in the lens barrel BR1, and the light-shielding plate 12 is disposed in the lens barrel BR1. In this embodiment, the light-shielding plate 12 may be disposed between the edges of two adjacent lenses 11 to block stray light.

[0025] The lens barrel BR1 includes a first part P1 and a second part P2. In this embodiment, the first part P1 is, for example, a cylindrical structure, and the second part P2 is a polygonal frame structure, such as a square frame structure or a rectangular frame structure. In this embodiment, the second part P2 is a rectangular frame structure. However, as described above, the shape of the second part P2 is not limited thereto. The object side surface A1 of the lens barrel BR1 is located in the first part, and the second part P2 is located between the substrate 100A and the first part P1. The second part P2 further includes a plurality of side walls SW1 (for example, four side walls SW1). An air-permeable gap TH1 is provided in one of these side walls SW1, and the air-permeable gap TH1 is provided at the bottom of the side wall SW1 close to the substrate 100A.

[0026] It should be emphasized that the air-permeable gap TH1 can be provided anywhere at the bottom of the side wall SW1 close to the substrate 100A. That is to say, the air-permeable gap TH1 can be provided anywhere at the bottom of any one of the side walls SW1.

[0027] In the first embodiment of the present utility model, the plurality of side walls SW1 can have the same side length or different side lengths. In the case of different side lengths, the side wall SW1 can further include a long side wall SW1a and a short side wall SW1b, where the side length of the long side wall SW1a is greater than that of the short side wall SW1b. It should be particularly noted that the long side wall SW1a and the short side wall SW1b are only used to distinguish the size relationship of the side lengths of any two adjacent side walls SW1. Taking FIGS. 1A and 1B as an example, the air-permeable gap TH1 is provided in the short side wall SW1b of the second part P2. In another embodiment, as shown in the lens group 20 of FIG. 1C, the air-permeable gap TH1 can also be provided in the long side wall SW1a of the second part P2.

[0028] In the first embodiment of the present utility model, the side wall SW1 provided with the air-permeable gap TH1 has a first side length W, and the air-permeable gap TH1 has a width x. In the first embodiment, the ratio of the width x of the air-permeable gap TH1 to the first side length W can also satisfy 0.01 < x / W < 0.5. However, the present utility model is not limited thereto.

[0029] In the first embodiment of the present utility model, another side wall SW1 adjacent to the side wall SW1 provided with the air-permeable gap TH1 has a second side length L, and the ratio of the width x of the air-permeable gap TH1 to the second side length L of the other side wall SW1 can satisfy 0.01 < x / L < 0.5. The present utility model is not limited thereto.

[0030] In the first embodiment of the present utility model, the side wall SW1 provided with the air-permeable gap TH1 has a first height H, the air-permeable gap TH1 has a second height h, and the ratio of the second height h to the first height H conforms to 0.03 < h / H < 0.8. The present utility model is not limited thereto.

[0031] Table 1 lists several examples of the size design of the lens assembly 20 according to the first embodiment of this utility model. Examples 1 and 2 correspond to the embodiments shown in Figure 1A, while examples 3 and 4 correspond to the embodiments shown in Figure 1C. Table 1 includes values ​​for width x, first side length W, second side length L, first height H, and second height h, with the units of the numbers in Table 1 being millimeters. It should be noted that the figures listed in the following tables are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0032] Table 1

[0033]

[0034] Figure 1B is a cross-sectional view of the lens assembly 20 according to the first embodiment of the present invention. As shown in Figure 1B, a plurality of lenses 11 and a plurality of light-shielding plates 12 are disposed in the lens barrel BR1 of the lens assembly 20. It should be noted that the cross-sectional view of the lens assembly 20 in Figure 1B of the present invention is merely an example and is not intended to limit the present invention. The number of lenses 11 and light-shielding plates 12 can be adjusted according to requirements.

[0035] Figure 2A is a perspective view of a camera module according to a second embodiment of the present invention, and Figure 2B is a cross-sectional view of the camera module of Figure 2A cut along the optical axis. Referring to Figures 2A and 2B, the camera module 10B of this embodiment is similar to the camera module 10A of Figures 1A and 1B, and the main differences between the two are as follows. The lens barrel BR2 of the lens group 30 of the camera module 10B of this embodiment includes a polygonal frame structure, which is, for example, a rectangular frame structure in this embodiment. However, in other embodiments, the polygonal frame structure may also be a square frame structure or other polygonal frame structures, and the present invention is not limited thereto. In this embodiment, the lens barrel BR2 includes an object side surface A2 and four side walls SW2 extending from the object side surface A2 to the substrate 100A. One of the four side walls SW2 has a ventilation notch TH2 near the bottom of the substrate 100A.

[0036] It should be emphasized that the ventilation gap TH2 can be set at any point on the bottom of the side wall SW2 near the substrate 100A. In other words, the ventilation gap TH2 can be set at any point on the bottom of any side wall SW2.

[0037] In the second embodiment of the present utility model, the multiple side walls SW2 may have the same side length or different side lengths. In the case of different side lengths, the side walls SW2 may further include long side walls SW2a and short side walls SW2b, where the side length of the long side wall SW2a is greater than that of the short side wall SW2b. It should be particularly noted that the long side wall SW2a and the short side wall SW2b are only used to distinguish the size relationship of the side lengths of any two adjacent side walls SW2. Taking FIGS. 2A and 2B as examples, the ventilation gap TH2 is provided on the short side wall SW2b. In another embodiment, as shown in the lens group 30 of FIG. 2C, the ventilation gap TH2 may also be provided on the long side wall SW2a.

[0038] In the second embodiment of the present utility model, the side wall SW2 provided with the ventilation gap TH2 has a first side length W, and the ventilation gap TH2 has a width x. In the second embodiment, the ratio of the width x of the ventilation gap TH2 to the first side length W may also satisfy 0.01 < x / W < 0.5. However, the present utility model is not limited thereto.

[0039] In the second embodiment of the present utility model, another side wall SW2 adjacent to the side wall SW2 provided with the ventilation gap TH2 has a second side length L, and the ratio of the width x of the ventilation gap TH2 to the second side length L of the other side wall SW2 may satisfy 0.01 < x / L < 0.5. The present utility model is not limited thereto.

[0040] In the second embodiment of the present utility model, the side wall SW2 provided with the ventilation gap TH2 has a first height H, the ventilation gap TH2 has a second height h, and the ratio of the second height h to the first height H conforms to 0.03 < h / H < 0.8. However, the present utility model is not limited thereto.

[0041] In Table 2, several cases of the size design of the lens group 30 in the second embodiment of the present utility model are listed. Among them, Case Five and Case Six correspond to the embodiment of FIG. 2A, and Case Seven and Case Eight correspond to the embodiment of FIG. 2C. Table 2 includes the values of the width x, the first side length W, the second side length L, the first height H, and the second height h, and the unit of the numbers in Table 2 is millimeters. It should be particularly noted that the numbers listed in the following charts are only for illustrative purposes of the present utility model and are not used to limit the present utility model.

[0042] Table 2

[0043]

[0044] In Table 3 in the following figure, the ratios of the width x of the ventilation gap TH2 to the first side length W and the ratio of the second height h to the first height H of the aforementioned Cases One to Case Eight are included, and both can satisfy the ranges of 0.01 < x / W < 0.5 and 0.03 < h / H < 0.8.

[0045] Table 3

[0046]

[0047] Figure 3A is a schematic diagram of the encapsulation of the lens assembly 20 and the substrate 100A with the photosensitive element S1 according to the first embodiment of this invention. Figure 3B is a schematic diagram of the encapsulation of the lens assembly 30 and the substrate 100A with the photosensitive element S1 according to the second embodiment of this invention. Taking the lens assembly 20 in Figure 3A as an example, before encapsulating the lens assembly 20 on the substrate 100A with the photosensitive element S1, the lens assembly 20 can be arranged on the substrate 100A with the photosensitive element S1 along the encapsulation direction D1. Then, after an alignment process, the bottom of the lens barrel BR1 is attached to the substrate 100A using encapsulating adhesive 1, and the encapsulating adhesive 1 is cured (e.g., by heat curing). For example, the process of arranging the lens assembly 20 on the substrate 100A with the photosensitive element S1 may include a heat curing process of the encapsulating adhesive 1. In the heat curing process, the gas generated inside the lens assembly 20 can be discharged through the vent TH1. Furthermore, in this embodiment, by placing the vent TH1 on the side wall SW1 near the bottom of the substrate 100A, the vent TH1 will not appear on the surface AP2 of the second part P2 of the lens barrel BR1, which is parallel to the object side surface A1, thus meeting the requirements of the appearance design. Moreover, placing the vent TH1 on the side wall SW1 near the bottom of the substrate 100A makes it easier to demold the lens barrel BR1 after injection molding. In addition, the lens assembly 30 of the second embodiment of this utility model can also be encapsulated on the substrate 100A through an active alignment process, which is largely the same as the process of the lens assembly 20 in the first embodiment, and ensures that the vent TH2 of the lens assembly 30 will not appear on the object side surface A2 of the lens barrel BR2, so it will not be described further. However, the ventilation gaps TH1 and TH2 of this invention may cause light leakage. However, the ventilation gaps TH1 and TH2 are designed to release the gas generated during the encapsulation process of the lens group 20 and lens group 30 encapsulated on the substrate 100A. Therefore, in subsequent processes, the ventilation gaps TH1 and TH2 can be filled, covered or sealed by encapsulating glue or other colloids or resins, without causing light leakage.

[0048] In summary, in the lens assembly and camera module of the present invention, by setting the venting opening on the side wall near the bottom of the substrate, the gas generated in the packaging process can be discharged through the venting opening, and it is also easy to cover or seal the venting opening in subsequent processes. Moreover, the venting opening does not expose the object side of the lens barrel, thus taking into account both the aesthetic appearance and the need for venting in the process.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens assembly, characterized in that, For mounting on a substrate having a photosensitive element, the lens assembly includes: a lens barrel including an object side and a sidewall extending from the object side toward the substrate; at least one lens disposed in the lens barrel; and at least one light shield disposed in the lens barrel, wherein the sidewall of the lens barrel has a venting notch near the bottom of the substrate.

2. The lens assembly according to claim 1, characterized in that, The lens barrel includes a first part and a second part. The first part is a cylindrical structure, and the second part is a polygonal frame structure. The second part is located between the first part and the substrate. One of the multiple sidewalls of the polygonal frame structure is provided with the ventilation notch near the bottom of the substrate.

3. The lens assembly according to claim 2, characterized in that, The sidewall with the ventilation opening has a first side length W, the ventilation opening has a width x, and the lens assembly satisfies 0.

01. <x / W <0.5。 4. The lens assembly according to claim 2, characterized in that, The sidewall adjacent to the sidewall with the ventilation opening has a second side length L, the ventilation opening has a width x, and the ratio of the width x of the ventilation opening to the second side length L of the other sidewall is 0.

01. <x / L <0.5。 5. The lens assembly according to claim 2, characterized in that, The sidewall with the ventilation opening has a first height H, and the ventilation opening has a second height h, the ratio of the second height h to the first height H being 0.

03. <h / H<0.8。 6. The lens assembly according to claim 1, characterized in that, The structure of the lens barrel includes a polygonal frame structure, which includes multiple sidewalls extending from the side of the object to the substrate, and one of the multiple sidewalls has the ventilation notch near the bottom of the substrate.

7. The lens assembly according to claim 6, characterized in that, The sidewall with the ventilation opening has a first side length W, the ventilation opening has a width x, and the lens assembly satisfies 0.

01. <x / W <0.5。 8. The lens assembly according to claim 6, characterized in that, The sidewall adjacent to the sidewall with the ventilation opening has a second side length L, the ventilation opening has a width x, and the ratio of the width x of the ventilation opening to the second side length L of the other sidewall is 0.

01. <x / L <0.5。 9. The lens assembly according to claim 6, characterized in that, The sidewall with the ventilation opening has a first height H, and the ventilation opening has a second height h, the ratio of the second height h to the first height H being 0.

03. <h / H<0.8。 10. A camera module, characterized in that, include: substrate; A photosensitive element is disposed on the substrate; The lens assembly is disposed on the substrate and covers the photosensitive element. The lens assembly includes: a lens barrel including an object side and a sidewall extending from the object side towards the substrate; at least one lens disposed in the lens barrel; and at least one light shield disposed in the lens barrel, wherein the sidewall of the lens barrel has a venting notch near the bottom of the substrate.

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