Optical filter support capable of improving stray light, camera module and electronic equipment

Abstract

The utility model relates to an optical filter support capable of improving stray light, a camera module and an electronic device, the optical filter support comprises a support body, the support body is provided with a first end and a second end which are opposite to each other in the thickness direction, the first end of the support body is provided with a sinking step used for installing an optical filter, and the second end of the support body is provided with a convex step. The support body is further provided with a through hole penetrating in the thickness direction, the inner periphery of the first end of the support body is provided with a chamfer, and an inclined face is formed on the wall face of the inner periphery through the chamfer. According to the utility model, the stray light phenomenon generated by reflection of light among the side wall step of the optical filter support, the lens and the photosensitive chip can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of camera modules, and in particular to a filter bracket, a camera module and an electronic device capable of improving stray light. Background Art

[0002] With the rapid development of 5G communication technology, smart electronic devices such as smartphones and tablets are becoming increasingly popular and their intelligence levels are constantly improving. The performance of the imaging system in these devices has become a key concern for users, directly affecting the user experience and the market competitiveness of the devices. Improving image quality not only relies on the coordinated operation of core components such as high-performance image sensors, infrared cutoff filters (IRAs), voice coil motors (VCMs), and lenses, but also requires that these components be designed and manufactured to minimize stray light.

[0003] Stray light, a key indicator that directly affects image quality, has various sources, potentially arising from any component within the camera module or the interaction between components. Among these sources, stray light generated by reflections from the filter holder, lens, and photosensitive chip is particularly significant, severely impacting image clarity and color reproduction.

[0004] In the prior art, the design of the filter holder side wall step usually adopts a 90° right angle structure, such as Figure 1 This design seems simple and straightforward in theory, but in actual production, due to limitations in the injection molding process, the molded material often fails to maintain an ideal right-angle shape, instead exhibiting a certain degree of rounded corners. This rounded corner feature creates conditions for reflections between the filter holder, lens, and photosensitive chip, resulting in stray light that affects image quality.

[0005] Specifically, when light enters the camera module through the lens, it may be reflected or scattered by the rounded corners of the filter holder's side steps, creating stray light. This stray light not only reduces image contrast but can also cause color distortion or image blur, severely impacting the user's shooting experience.

[0006] Therefore, in order to solve the problem of stray light caused by reflection between the filter holder, lens and photosensitive chip, an innovative design solution is urgently needed to eliminate or reduce the generation of such stray light, thereby improving the image quality of the camera module. Summary of the Invention

[0007] The purpose of the utility model is to provide a filter holder, a camera module and an electronic device that can improve stray light, so as to eliminate the stray light phenomenon caused by light reflecting between the side wall steps of the filter holder, the lens and the photosensitive chip.

[0008] In the first aspect, the utility model provides a filter holder capable of improving stray light, comprising a holder body, the holder body having a first end and a second end opposite to each other in the thickness direction, the first end of the holder body being provided with a sunken step for mounting the filter, and the holder body also having a through hole passing through in the thickness direction, the inner periphery of the first end of the holder body being chamfered, and the chamfer forming an inclined surface on the inner periphery wall.

[0009] Optionally, the inclined surface is inclined downward from the outside to the inside.

[0010] Optionally, the angle between the inclined surface and the vertical surface is any value between 55° and 65°. The angle between the inclined surface and the vertical surface is set to any value between 55° and 65°. The selection of these angle ranges helps to further reduce the generation of stray light while ensuring the stability and reliability of the filter holder structure.

[0011] Optionally, the angle between the inclined surface and the vertical surface is 60°, which is an optimal angle at which the stray light problem can be better solved.

[0012] In a second aspect, a camera module described in the present invention adopts the filter holder capable of improving stray light as described in the present invention.

[0013] In a third aspect, an electronic device according to the present invention adopts the camera module according to the present invention.

[0014] The utility model has the following advantages:

[0015] The filter holder capable of improving stray light described in the present invention is designed with a chamfered structure on the inner periphery of the first end of the holder body and constructs an inclined surface. This design helps to reduce the reflection of light between the side wall steps of the filter holder, the lens and the photosensitive chip, thereby effectively eliminating the stray light phenomenon caused by the reflection of light between the side wall steps of the filter holder, the lens and the photosensitive chip, so that the image quality captured by the camera module is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of an existing filter holder (including a photosensitive chip, filters, and electronic components);

[0017] Figure 2 A cross-sectional view of a filter holder (including a photosensitive chip, a filter, and electronic components) capable of improving stray light as described in an embodiment of the present application;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of part A in FIG;

[0019] Explanation of the accompanying reference numerals: 1. bracket body, 11. sunken step, 12. through hole, 2. filter, 3. circuit board, 4. photosensitive chip, 5. electronic components. DETAILED DESCRIPTION

[0020] The following describes the implementation of the technical solution of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. The present invention may also be implemented or applied through different specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0021] like Figure 2 and Figure 3 As shown, in an embodiment of the present application, a filter holder capable of improving stray light includes a holder body 1, the holder body 1 having a first end and a second end opposite to each other in the thickness direction, a sunken step 11 for mounting the filter 2 is provided on the first end of the holder body 1, and the holder body 1 also has a through hole 12 passing through in the thickness direction, the inner periphery of the first end of the holder body 1 has a chamfer, and the chamfer forms an inclined surface 13 on the inner periphery wall surface.

[0022] In an embodiment of the present application, a filter holder that can improve stray light is provided. A chamfered structure is designed on the inner periphery of the first end of the holder body 1, and an inclined surface is constructed. This design helps to reduce the reflection of light between the side wall steps of the filter holder, the lens, and the photosensitive chip 4, thereby effectively eliminating the stray light phenomenon caused by the reflection of light between the side wall steps of the filter holder, the lens, and the photosensitive chip 4, so that the image quality captured by the camera module is higher.

[0023] like Figure 3 As shown, in a possible embodiment, the inclined surface 13 is inclined downward from the outside to the inside.

[0024] like Figure 3 As shown, in a possible embodiment, the angle between the inclined surface 13 and the vertical surface (such as Figure 3 The angle a) is any value between 55° and 65°. The angle between the inclined surface 13 and the vertical surface is set to any value between 55° and 65°. The selection of these angle ranges helps to further reduce the generation of stray light while ensuring the stability and reliability of the bracket structure.

[0025] In a possible embodiment, the angle between the inclined surface 13 and the vertical surface is 60°. 60° is an optimal angle, at which the stray light problem can be better solved.

[0026] In an embodiment of the present application, a camera module adopts a filter holder capable of improving stray light as described in the embodiment of the present application.

[0027] like Figure 2 As shown, in one possible embodiment, in addition to the stray light filter holder, the camera module also includes a circuit board 3, a photosensitive chip 4, electronic components 5, a filter 2, a lens assembly (not shown), and a motor (not shown). The photosensitive chip 4 and electronic components 5 are respectively arranged on the circuit board 3. The second end of the stray light filter holder is fixedly mounted on the circuit board 3, and the filter 2 is mounted on the sunken step 11 of the stray light filter holder. The lens assembly is mounted on the motor, and the motor is mounted on the filter holder.

[0028] In an embodiment of the present application, an electronic device adopts the camera module as described in the embodiment of the present application.

[0029] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A filter holder capable of improving stray light, comprising a holder body (1), the holder body (1) having a first end and a second end opposite to each other in a thickness direction, a sunken step (11) for mounting a filter (2) being provided on the first end of the holder body (1), and the holder body (1) further having a through hole (12) extending through the holder body in the thickness direction, characterized in that: The inner periphery of the first end of the bracket body (1) has a chamfer, and the chamfer forms an inclined surface (13) on the inner periphery wall.

2. The filter holder capable of improving stray light according to claim 1, characterized in that: The inclined surface (13) is inclined downward from the outside to the inside.

3. The filter holder capable of improving stray light according to claim 1, characterized in that: The angle between the inclined surface (13) and the vertical surface is 55° to 65°.

4. The filter holder capable of improving stray light according to claim 3, characterized in that: The angle between the inclined surface (13) and the vertical surface is 60°.

5. A camera module, characterized in that: A filter holder capable of improving stray light as described in any one of claims 1 to 4 is used.

6. An electronic device, characterized in that: Use the camera module as described in claim 5.

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