A camera module and a terminal device

Abstract

The utility model discloses a camera module, include: sensor component, have photosensitive area, install baseplate, set up on sensor component, have baseplate window, optical lens, set up on install baseplate, have light inlet area, photosensitive area, baseplate window and light inlet area are in proper order along the optical axis alignment, and light inlet area is greater than baseplate window, baseplate window is greater than photosensitive area, install baseplate is equipped with the diffuse reflection microstructure on the side surface to optical lens, this camera module can reduce the intensity of stray light that install baseplate reflection incident light forms, improve the imaging effect. The utility model discloses still a kind of terminal equipment, including above-mentioned camera module.

Description

Technical Field

[0001] This utility model relates to camera technology, and more particularly to a camera module and terminal device. Background Technology

[0002] Existing camera modules mainly consist of three parts: a sensor assembly, a mounting base, and an optical lens. To ensure good exposure even at the edges of the sensor assembly's light-sensitive area, the light-receiving area of ​​the optical lens is generally larger than the sensor assembly's light-sensitive area. Simultaneously, to prevent stray light from being reflected by the non-light-sensitive areas of the sensor assembly, the base window of the mounting base is typically between the light-receiving area of ​​the optical lens and the light-sensitive area of ​​the sensor assembly. This results in the light-receiving area of ​​the optical lens partially covering the mounting base, causing some incident light to illuminate the upper surface of the mounting base and be reflected, creating stray light. This stray light undergoes multiple internal reflections between the mounting base and the optical lens, ultimately reaching the sensor assembly's light-sensitive area through the base window on the mounting base, thus affecting the sensor assembly's imaging performance. Utility Model Content

[0003] To address the shortcomings of the prior art, this utility model provides a camera module and terminal device that can reduce the intensity of stray light formed by the reflection of incident light from the mounting base, thereby improving the imaging effect.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution: A camera module, comprising: The sensor assembly has a photosensitive area; A mounting base is provided on the sensor assembly and has a base window; An optical lens, mounted on the mounting base, has a light-receiving area; The photosensitive area, the base window, and the light-entry area are aligned sequentially along the optical axis, and the light-entry area is larger than the base window, and the base window is larger than the photosensitive area. The mounting base has a diffuse reflection microstructure on the side surface facing the optical lens.

[0005] Furthermore, the diffuse reflection microstructure is composed of a series of protrusions or recesses at the micrometer or nanometer scale, wherein the height or depth of the protrusions or recesses is between 500-2000 nm, the width is between 30-200 nm, and the spacing is between 200-500 nm.

[0006] Furthermore, the sensor assembly includes a first rigid PCB, an FPC flexible board, a second rigid PCB, an electrical connector, and an image sensor. The image sensor is mounted on one side surface of the first rigid PCB, the electrical connector is mounted on one side surface of the second rigid PCB, and the FPC flexible board is connected between the first rigid PCB and the second rigid PCB. The mounting base is disposed on the side surface of the first rigid PCB used to mount the image sensor.

[0007] Furthermore, the mounting base includes a support portion and a mounting portion. The support portion protrudes from the mounting portion on one side surface facing the first PCB rigid board and surrounds the periphery of the image sensor. The base window is disposed within the mounting portion, and the diffuse reflection microstructure is disposed on the mounting portion on one side surface facing the optical lens.

[0008] Furthermore, at least a portion of the inner wall of the mounting base at the base window is sloped, with the slope facing the optical lens.

[0009] Furthermore, the diffuse reflection microstructure extends to cover the inclined surface of the mounting base.

[0010] Furthermore, the camera module also includes an infrared cut-off filter, which is disposed within the base window of the mounting base.

[0011] Furthermore, the infrared cut-off filter has a light-shielding ink layer on the side surface facing the optical lens. The light-shielding ink layer has an ink window that is aligned with the base window and is the same size as the photosensitive area.

[0012] Furthermore, the light-shielding ink layer is black ink and has a thickness of 4-10 μm.

[0013] A terminal device includes the aforementioned camera module.

[0014] The present invention has the following beneficial effects: The camera module of the present invention provides a diffuse reflection microstructure on the side surface of the mounting base facing the optical lens, so that part of the incident light that hits the mounting base is diffusely reflected in all directions by the diffuse reflection microstructure, thereby avoiding the formation of stray light with high intensity due to the excessive concentration of the incident light reflected by the mounting base 2, and thus improving the imaging effect of the sensor component. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the camera module provided by this utility model. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the terms "first," "second," and "third" are used 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 as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," 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; and 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 utility model according to the specific circumstances.

[0020] Example 1 like Figure 1 As shown, a camera module includes: Sensor assembly 1 has a photosensitive area; Mounting base 2 is mounted on the sensor assembly 1 and has a base window; Optical lens 3 is mounted on the mounting base 2 and has a light-receiving area; The photosensitive area, the base window, and the light-entry area are aligned sequentially along the optical axis, and the light-entry area is larger than the base window, and the base window is larger than the photosensitive area. The mounting base 2 has a diffuse reflection microstructure 23 on the side surface facing the optical lens 3.

[0021] The camera module of this utility model provides a diffuse reflection microstructure 23 on the side surface of the mounting base 2 facing the optical lens 3. This allows a portion of the incident light that hits the mounting base 2 to be diffusely reflected in all directions by the diffuse reflection microstructure 23. This avoids the incident light reflected by the mounting base 2 from being too concentrated and forming stray light with high intensity, thereby improving the imaging effect of the sensor assembly 1.

[0022] Preferably, the diffuse reflection microstructure 23 is composed of a series of protrusions or recesses at the micrometer or nanometer scale, which can be fabricated on the surface of the mounting base 2 by means of laser engraving, photolithography, etc.; the height or depth of the protrusions or recesses is between 500-2000nm, the width is between 30-200nm, and the spacing is between 200-500nm.

[0023] The sensor assembly 1 includes a first rigid PCB 11, an FPC flexible board 12, a second rigid PCB 13, an electrical connector 14, and an image sensor 15. The image sensor 15 is mounted on one side surface of the first rigid PCB 11, the electrical connector 14 is mounted on one side surface of the second rigid PCB 13, and the FPC flexible board 12 is connected between the first rigid PCB 11 and the second rigid PCB 13. The mounting base 2 is disposed on the side surface of the first rigid PCB 11 for mounting the image sensor 15.

[0024] During terminal assembly, the camera module is connected to the processor motherboard of the terminal device through the electrical connector 14 on the sensor assembly 1. The image signal collected by the image sensor 15 is converted from analog to digital by the peripheral circuit on the first PCB rigid board 11, and then transmitted to the processor motherboard of the terminal device for data processing through the FPC flexible board 12, the second PCB rigid board 13 and the electrical connector 14 in sequence.

[0025] In this embodiment, the electrical connector 14 is a BTB connector.

[0026] The mounting base 2 includes a support portion 21 and a mounting portion 22. The support portion 21 protrudes from the mounting portion 22 on one side surface facing the first PCB rigid board 11 and surrounds the periphery of the image sensor 15. The base window is disposed inside the mounting portion 22, and the diffuse reflection microstructure 23 is disposed on the mounting portion 22 on one side surface facing the optical lens 3.

[0027] The mounting base 2 has at least a portion of the inner wall of the window at the base window set as an inclined surface, and the inclined surface faces the optical lens 3.

[0028] The camera module of this utility model designs at least part of the inner wall of the window of the mounting base 2 as an inclined surface, so as to change the reflection direction of the incident light by the inner wall of the window, thereby causing the reflected light to re-enter the optical lens 3 at a specific angle and finally exit the camera module through the optical lens 3, thereby reducing the secondary reflection of the reflected light by the optical lens 3.

[0029] Preferably, in order to prevent the incident light reflected by the inclined surface from being reflected back by the optical lens 3 again, the diffuse reflection microstructure 23 can extend to cover the inclined surface of the mounting base 2 to diffusely reflect this part of the light.

[0030] The camera module also includes an infrared cut-off filter 4, which is disposed within the base window of the mounting base 2.

[0031] The camera module of this utility model filters out the infrared light portion of the incident light by setting the infrared cut-off filter 4 in the base window of the mounting base 2, thereby avoiding interference of infrared light with the imaging of the image sensor 15.

[0032] Preferably, the infrared cut-off filter 4 has a light-shielding ink layer 5 on the side surface facing the optical lens 3. The light-shielding ink layer 5 has an ink window that is aligned with the base window and is the same size as the photosensitive area.

[0033] The camera module of this utility model provides a light-shielding ink layer 5 on the side surface of the infrared cut-off filter 4 facing the optical lens 3. This allows some of the incident light that hits the outer area of ​​the infrared cut-off filter 4 to be absorbed and canceled by the light-shielding ink layer 5, thereby preventing stray light from forming in the outer area of ​​the infrared cut-off filter 4 due to reflection of incident light, and thus improving the imaging effect of the sensor assembly 1.

[0034] Preferably, the light-shielding ink layer 5 is black ink and has a thickness of 4-10 μm.

[0035] Example 2 A terminal device includes the camera module described in Embodiment 1.

[0036] The terminal device in this embodiment may be, but is not limited to, a mobile phone, tablet, computer, home appliance, or car.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present utility model, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the present utility model.

Claims

1. A camera module, characterized in that, include: The sensor assembly has a photosensitive area; A mounting base is provided on the sensor assembly and has a base window; An optical lens, mounted on the mounting base, has a light-receiving area; The photosensitive area, the base window, and the light-entry area are aligned sequentially along the optical axis, and the light-entry area is larger than the base window, and the base window is larger than the photosensitive area. The mounting base has a diffuse reflection microstructure on the side surface facing the optical lens.

2. The camera module according to claim 1, characterized in that, The diffuse reflection microstructure is composed of a series of protrusions or recesses at the micrometer or nanometer scale, wherein the height or depth of the protrusions or recesses is between 500-2000 nm, the width is between 30-200 nm, and the spacing is between 200-500 nm.

3. The camera module according to claim 1, characterized in that, The sensor assembly includes a first rigid PCB, an FPC flexible board, a second rigid PCB, an electrical connector, and an image sensor. The image sensor is mounted on one side surface of the first rigid PCB, the electrical connector is mounted on one side surface of the second rigid PCB, and the FPC flexible board is connected between the first rigid PCB and the second rigid PCB. The mounting base is disposed on the side surface of the first rigid PCB used to mount the image sensor.

4. The camera module according to claim 3, characterized in that, The mounting base includes a support portion and a mounting portion. The support portion protrudes from the mounting portion on the side surface facing the first PCB rigid board and surrounds the periphery of the image sensor. The base window is disposed within the mounting portion, and the diffuse reflection microstructure is disposed on the side surface of the mounting portion facing the optical lens.

5. The camera module according to claim 1 or 4, characterized in that, The mounting base has at least a portion of the inner wall of the window at the base being sloped, with the slope facing the optical lens.

6. The camera module according to claim 5, characterized in that, The diffuse reflection microstructure extends and covers the inclined surface of the mounting base.

7. The camera module according to claim 1, characterized in that, The camera module also includes an infrared cut-off filter, which is disposed within the base window of the mounting base.

8. The camera module according to claim 7, characterized in that, The infrared cut-off filter has a light-shielding ink layer on the side surface facing the optical lens. The light-shielding ink layer has an ink window that is aligned with the base window and is the same size as the photosensitive area.

9. The camera module according to claim 8, characterized in that, The light-shielding ink layer is black ink and has a thickness of 4-10 μm.

10. A terminal device, characterized in that, Includes the camera module as described in claim 1.

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