Lens assembly, camera module and electronic device

Abstract

Embodiments of the present disclosure provide a lens assembly, a camera module and an electronic device, and relate to the technical field of electronics. The lens assembly comprises a convex lens and a prism. The prism has a first light inlet surface and a first light outlet surface. The convex lens has a second light outlet surface. The first light inlet surface is perpendicular to the first light outlet surface. The second light outlet surface of the convex lens is connected to the first light inlet surface of the prism in a fit manner. The convex lens is provided with a blackening layer. The blackening layer forms an annular structure along the edge region of the convex lens. The blackening layer can shield the light at the edge region of the convex lens, thereby effectively eliminating the stray light generated when the light passes through the convex lens and the prism, and helping to improve the imaging quality of the camera module.

Description

Technical Field

[0001] This disclosure relates to the field of electronic technology, and in particular to a lens assembly, camera module and electronic device. Background Technology

[0002] Currently, smartphones and other smart electronic devices have camera functions. In order to reduce the height of the camera module, some electronic devices use periscope camera modules, which use right-angle prisms to change the incident angle of light, thereby achieving a camera module with a smaller height.

[0003] In related technologies, the right-angle prism of a periscope camera module will produce stray light during the refraction of light, which will reduce the imaging quality of the camera module. Utility Model Content

[0004] In view of this, the present disclosure provides a lens assembly, a camera module, and an electronic device with higher imaging quality.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, embodiments of this disclosure provide a lens assembly, including a convex lens and a prism, the prism having a first light-inlet surface and a first light-outlet surface, the convex lens having a second light-outlet surface, the first light-inlet surface being perpendicular to the first light-outlet surface, and the second light-outlet surface of the convex lens being fitted and connected to the first light-inlet surface of the prism.

[0007] The convex lens is provided with a blackening layer, which forms a ring structure along the edge region of the convex lens.

[0008] In some embodiments of this disclosure, the blackout layer is located between the second light-emitting surface of the convex lens and the first light-incoming surface of the prism; and / or

[0009] The convex lens has a second light-gathering surface, and the black-blocking layer is located on the second light-gathering surface.

[0010] In some embodiments of this disclosure, the inner edge of the annular structure of the blackening layer located between the second light-emitting surface and the first light-receiving surface is at least partially straight; and / or

[0011] The inner edge of the annular structure of the blackening layer located on the second light-gathering surface is at least partially wavy.

[0012] In some embodiments of this disclosure, the orthographic projection of the convex lens onto the first light-gathering surface is oval.

[0013] In some embodiments of this disclosure, the blackening layer includes a plurality of first refractive films, a plurality of second refractive films, and a light-absorbing film, wherein the plurality of first refractive films and the plurality of second refractive films are alternately stacked, and the light-absorbing film is located between adjacent first refractive films and second refractive films.

[0014] In some embodiments of this disclosure, the refractive index nd of the first refractive film is 2 to 3, the refractive index nd of the second refractive film is 1 to 2, and the refractive index nd of the light-absorbing film is 1 to 3.

[0015] In some embodiments of this disclosure, the first light-emitting surface of the prism is an arc surface.

[0016] In some embodiments of this disclosure, the thickness of the masking layer is 0.4 μm to 2 μm.

[0017] In some embodiments of this disclosure, the refractive index of the convex lens is different from that of the prism.

[0018] Secondly, embodiments of this disclosure provide a camera module, the camera module including the lens assembly described in any of the first aspects above.

[0019] Thirdly, embodiments of this disclosure provide an electronic device, which includes the camera module described in the second aspect above.

[0020] The beneficial effects of the technical solutions provided in this disclosure include at least the following:

[0021] In the lens assembly provided in the embodiments of this disclosure, the first light-gathering surface of the prism is connected to the convex lens, and a blackening layer is provided in the edge region of the convex lens. The blackening layer can block the light in the edge region of the convex lens, thereby effectively eliminating stray light generated when the light passes through the convex lens and the prism, which is beneficial to improving the imaging quality of the camera module. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A cross-sectional view of a lens assembly provided in an embodiment of this disclosure;

[0024] Figure 2 A schematic diagram of a lens assembly provided in an embodiment of this disclosure;

[0025] Figure 3A schematic diagram of a convex lens in a lens assembly provided in an embodiment of this disclosure;

[0026] Figure 4 A schematic diagram of a convex lens in a lens assembly provided in an embodiment of this disclosure;

[0027] Figure 5 This is a partial schematic diagram of a lens assembly provided in an embodiment of this disclosure.

[0028] The reference numerals in the figure are respectively:

[0029] 1-Prism; 2-Convex lens; 3-Blackening layer;

[0030] 101 - First light-incoming surface; 102 - First light-outcoming surface; 103 - Reflective surface; 201 - Second light-incoming surface; 202 - Second light-outcoming surface; 301 - First refractive film; 302 - Second refractive film; 303 - Light-absorbing film.

[0031] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0032] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] Figure 1 A schematic diagram of a lens assembly provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a lens assembly provided in an embodiment of this disclosure. Figure 1-2 As shown, the lens assembly provided in this embodiment includes a prism 1 and a convex lens 2. The prism 1 has a first light-inlet surface 101 and a first light-outlet surface 102. The convex lens 2 has a second light-outlet surface 202. The first light-inlet surface 101 is perpendicular to the first light-outlet surface 102. The second light-outlet surface 202 of the convex lens 2 is attached and connected to the first light-inlet surface 101 of the prism 1. The convex lens 2 is provided with a black-shielding layer 3, which forms a ring structure along the edge region of the convex lens 2.

[0034] In the lens assembly provided in the embodiments of this disclosure, the first light-incoming surface 101 of the prism 1 is connected to the convex lens 2, and a blackening layer 3 is provided in the edge region of the convex lens 2. The blackening layer 3 can block the light in the edge region of the convex lens 2, thereby effectively eliminating stray light generated when the light passes through the convex lens 2 and the prism 1, which is beneficial to improving the imaging quality of the camera module.

[0035] To make the technical solutions and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0036] See Figure 1 The lens assembly provided in this embodiment includes a prism 1 and a convex lens 2. The prism 1 has a first light-incoming surface 101 and a first light-outcoming surface 102. The first light-incoming surface 101 is perpendicular to the first light-outcoming surface 102, and can convert vertically incident light into horizontally incident light, thereby realizing a periscope camera module. The convex lens 2 has a first light-incoming surface 201 and a second light-outcoming surface 202, which are attached to the first light-incoming surface 101 of the prism 1. The convex lens 2 is provided with a blackening layer 3, which forms a ring structure along the edge region of the convex lens 2. The blackening layer 3 can block light from the edge region of the convex lens 2, such as blocking diffracted light or diffused light, thereby effectively eliminating stray light generated when light passes through the convex lens 2 and the prism 1, which is beneficial to improving the imaging quality of the camera module.

[0037] For example, see Figure 2 Prism 1 is a triangular prism, and prism 1 also has a reflecting surface 103, which is configured to reflect light rays entering from the first light-entering surface 101 and exiting from the first light-exiting surface 102.

[0038] In some embodiments of this disclosure, the blackening layer 3 is located between the second light-emitting surface 202 of the convex lens 2 and the first light-incoming surface 101 of the prism 1; and / or, the blackening layer 3 is located on the second light-incoming surface 201. The blackening layer located on the second light-incoming surface 201 is used to block light from the edge region of the second light-incoming surface 201 of the convex lens 2, and the blackening layer located on the second light-emitting surface 202 is used to block light from the edge region of the surface between the convex lens 2 and the prism 1.

[0039] It should be noted that the blackening layer 3 involved in the embodiments of this disclosure can be formed by spraying ink or coating. For example, ink can be applied by pad printing, screen printing or spraying technology, or coating can be achieved by PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition) or magnetron sputtering technology.

[0040] In some embodiments of this disclosure, such as Figure 2 As shown, the first light-emitting surface 102 of the prism 1 is an arc surface. The first light-emitting surface 102 is used to adjust the emission direction of light rays passing through the prism 1. For example, the first light-emitting surface 102 is a protruding arc surface or... Figure 2 The concave curved surface shown has optical power for both prism 1 and convex lens 2. When light passes through convex lens 2, it is focused. After being reflected by prism 1, the light passes through the first light-emitting surface 102 and is focused again, which makes the imaging effect of the prism assembly better and helps to improve the shooting performance of the camera module.

[0041] Figure 3 This is a schematic diagram of the convex lens 2 of a lens assembly provided in an embodiment of this disclosure. In some embodiments of this disclosure, such as... Figure 3 As shown, the inner edge of the annular structure of the blackening layer 3 located on the second light-receiving surface 201 is at least partially wavy. The blackening layer 3 is an oval ring structure, and the edges of the two opposite straight segments of the blackening layer 3 that are close to each other are wavy. This wavy structure can suppress stray light generated by diffraction in the edge region of the convex lens 2, thereby improving the imaging effect of the lens assembly.

[0042] Figure 4 This is a schematic diagram of the convex lens 2 of a lens assembly provided in an embodiment of this disclosure. In some embodiments of this disclosure, such as... Figure 4 As shown, the inner edge of the annular structure of the blackening layer 3 located between the second light-emitting surface 202 and the first light-incoming surface 101 is at least partially straight.

[0043] Optionally, see Figure 4 The orthographic projection of the convex lens 2 onto the first light-receiving surface 101 is oval. The specific shape of the convex lens 2 can be adapted to the shape of the first light-receiving surface 101, so as to cover the first light-receiving surface 101 as much as possible, thereby fully converging the incident light rays.

[0044] It should be noted that, Figure 3 The convex lens 2 shown is viewed from a top-down angle. Figure 4 The convex lens 2 shown is viewed from a downward angle.

[0045] Figure 5 This is a partial schematic diagram of a lens assembly provided in an embodiment of this disclosure. In some embodiments of this disclosure, such as... Figure 5As shown, the blackening layer 3 includes multiple first refractive films 301, multiple second refractive films 302, and a light-absorbing film 303. The multiple first refractive films 301 and multiple second refractive films 302 are alternately stacked, and the light-absorbing film 303 is located between adjacent first refractive films 301 and second refractive films 302. Specifically, the light-absorbing film 303 can be located in the middle of the entire blackening layer 3, or on the side closer to the convex lens 2, or on the side farther away from the convex lens 2. The opposite sides of the light-absorbing film 303 are the first refractive film 301 and the second refractive film 302, respectively. The film layer adjacent to the first refractive film 301 is either the second refractive film 302 or the light-absorbing film 303, and the film layer adjacent to the second refractive film 302 is either the first refractive film 301 or the light-absorbing film 303.

[0046] Optionally, the refractive index nd of the first refractive film 301 is 2 to 3, the refractive index nd of the second refractive film 302 is 1 to 2, and the refractive index nd of the light-absorbing film 303 is 1 to 3. The wavelength of the light corresponding to the color of the blackening layer 3 provided in this embodiment is 400nm-700nm, and the blackening layer 3 has a light-blocking rate of more than 99.5%, which can cover a wide range of wavelengths of light, thereby ensuring a good light-blocking effect.

[0047] Optionally, the thickness of the blackening layer 3 provided in this embodiment is 0.4 μm to 2 μm. The relatively small thickness of the blackening layer 3 does not affect the overall size of the lens assembly, which is beneficial for achieving a smaller lens assembly.

[0048] Optionally, the refractive index of the convex lens 2 provided in this embodiment is different from that of the prism 1. The difference in refractive index between the convex lens 2 and the prism 1 can compensate for the differences in light paths of different wavelengths and reduce chromatic aberration.

[0049] Furthermore, this disclosure also provides a camera module that includes the lens assembly of any of the above embodiments.

[0050] In the camera module provided in the embodiments of this disclosure, the first light-incoming surface 101 of the prism 1 of the lens assembly is connected to the convex lens 2. A blackening layer 3 is provided in the edge area of ​​the convex lens 2. The blackening layer 3 can block the light in the edge area of ​​the convex lens 2, thereby effectively eliminating stray light generated when the light passes through the convex lens 2 and the prism 1, which is beneficial to improving the imaging quality of the camera module.

[0051] In addition, this disclosure also provides an electronic device that includes the camera module described in the above embodiments.

[0052] It should be noted that the electronic device provided in this disclosure embodiment may be, but is not limited to, a remote control, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 player (Moving Picture Experts Group Audio Layer IV), a laptop computer, or other electronic devices with shooting capabilities. This electronic device may also be referred to as a user device, a portable terminal, a laptop terminal, or other similar names.

[0053] In the electronic device provided in the embodiments of this disclosure, the first light-incoming surface 101 of the prism 1 of the lens assembly is connected to the convex lens 2. A blackening layer 3 is provided in the edge region of the convex lens 2. The blackening layer 3 can block the light in the edge region of the convex lens 2, thereby effectively eliminating stray light generated when the light passes through the convex lens 2 and the prism 1, which is beneficial to improving the imaging quality of the camera module.

[0054] It should be noted that in this article, "several" and "at least one" refer to one or more, while "multiple" and "at least two" refer to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In the description of this disclosure, it should be noted that, unless otherwise expressly 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; 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. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0056] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0058] In the description of this specification, the references to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the embodiments or examples that are included in at least one embodiment or example of this disclosure.

[0059] The above description is merely an embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A lens assembly, characterized in that, The device includes a prism (1) and a convex lens (2). The prism (1) has a first light-inlet surface (101) and a first light-outlet surface (102). The convex lens (2) has a second light-outlet surface (202). The first light-inlet surface (101) is perpendicular to the first light-outlet surface (102). The second light-outlet surface (202) of the convex lens (2) is fitted and connected to the first light-inlet surface (101) of the prism (1). The convex lens (2) is provided with a blackening layer (3), and the blackening layer (3) forms a ring structure along the edge region of the convex lens (2).

2. The lens assembly according to claim 1, characterized in that, The blackout layer (3) is located between the second light-emitting surface (202) of the convex lens (2) and the first light-entering surface (101) of the prism (1); and / or The convex lens (2) has a second light-gathering surface (201), and the black-blocking layer (3) is located on the second light-gathering surface (201).

3. The lens assembly according to claim 2, characterized in that, The inner edge of the annular structure of the blackening layer (3) located between the second light-emitting surface (202) and the first light-incoming surface (101) is at least partially straight; and / or The inner edge of the annular structure of the blackening layer (3) located on the second light-gathering surface (201) is at least partially wavy.

4. The lens assembly according to claim 1, characterized in that, The orthographic projection of the convex lens (2) onto the first light-gathering surface (101) is oval.

5. The lens assembly according to claim 1, characterized in that, The blackening layer (3) includes a plurality of first refractive films (301), a plurality of second refractive films (302) and a light-absorbing film (303). The plurality of first refractive films (301) and the plurality of second refractive films (302) are stacked alternately, and the light-absorbing film (303) is located between adjacent first refractive films (301) and second refractive films (302).

6. The lens assembly according to claim 5, characterized in that, The first refractive film (301) has a refractive index nd of 2 to 3, the second refractive film (302) has a refractive index nd of 1 to 2, and the light-absorbing film (303) has a refractive index nd of 1 to 3.

7. The lens assembly according to claim 2, characterized in that, The first light-emitting surface (102) of the prism (1) is an arc surface.

8. The lens assembly according to any one of claims 1 to 7, characterized in that, The thickness of the blackening layer (3) is 0.4μm to 2μm.

9. The lens assembly according to any one of claims 1 to 7, characterized in that, The refractive index of the convex lens (2) is different from that of the prism (1).

10. A camera module, characterized in that, The camera module includes the lens assembly as described in any one of claims 1 to 9.

11. An electronic device, characterized in that, The electronic device includes the camera module as described in claim 10.

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