Support for reducing reflected stray light, camera module and terminal device

Abstract

This utility model relates to a bracket, camera module, and terminal device for reducing reflected stray light. The bracket includes a main body with opposing first and second surfaces. A light-transmitting hole is provided on the main body, penetrating both the first and second surfaces. A mounting groove surrounds the light-transmitting hole on the first surface. The first surface also has a recess surrounding the mounting groove that reflects stray light into the lens barrel. This utility model solves the problem of stray light caused by light reflection in existing camera modules, thus improving image quality.

Description

Technical Field

[0001] This utility model relates to the field of camera module technology, specifically to a bracket, camera module and terminal device for reducing reflected stray light. Background Technology

[0002] In today's era of rapid technological advancement, portable electronic devices such as smartphones have become deeply integrated into people's daily lives, serving as indispensable tools for communication, entertainment, and recording. Among these devices, the camera, as a key functional component, greatly enriches the user's visual experience, fulfilling people's need to record beautiful moments and share life's little moments anytime, anywhere. Whether shooting landscapes, portraits, or recording important events, the camera plays a crucial role, and its image quality directly affects the user experience and shooting results.

[0003] From an optical perspective, lenses typically employ a circular design, allowing light to travel along a circular path as it enters the lens. The image sensor, as the core component for imaging, has a rectangular imaging surface (see...). Figure 1 Taking mobile phone image sensors as an example, the aspect ratio of the resulting rectangular image is generally 4:3. This design difference between the circular lens and the rectangular image sensor surface means that only the rectangular area receives light during the imaging process, and it is also more prone to light reflection.

[0004] In camera modules, light filters play a crucial role, filtering out unwanted light wavelengths to improve color accuracy. However, light often reflects off the filter's housing. Since filters are typically made of glass, which has extremely high reflectivity, stray light entering the glass is prone to multiple reflections. These reflected rays eventually project onto the image sensor surface, creating stray light. This stray light problem is particularly prominent in camera modules, negatively impacting image quality in several ways. It not only affects image sharpness and color reproduction but can also cause unwanted glare or light spots, severely degrading the quality of photos and videos. In recent years, with consumers' increasing demands for image quality and mobile phone manufacturers' strict quality control, stray light issues in camera modules have become a key factor restricting industry development.

[0005] Therefore, how to effectively reduce stray light interference in camera modules and improve image quality has become an important problem that urgently needs to be solved in the field of camera module technology. Utility Model Content

[0006] The purpose of this invention is to provide a bracket, camera module, and terminal device that reduce stray light from reflected light, so as to solve the problem of stray light generated by light reflection in existing camera modules and improve image quality.

[0007] In a first aspect, the present invention provides a bracket for reducing reflected stray light, comprising a bracket body, the bracket body comprising a first surface and a second surface opposite to each other, the bracket body having a light-transmitting hole penetrating the first surface and the second surface, the first surface having a mounting groove surrounding the light-transmitting hole; the first surface also having a groove surrounding the mounting groove and capable of reflecting stray light to the lens barrel.

[0008] Preferably, the width d of the groove in the V direction is greater than or equal to 0.3 mm; the width of the groove in the H direction is equal to 3d / 4, where the H direction refers to the direction parallel to the long side of the photosensitive chip, and the V direction refers to the direction parallel to the short side of the photosensitive chip.

[0009] Preferably, the bottom of the groove is flush with and connected to the bottom surface of the mounting groove.

[0010] Preferably, the inner wall of the groove is provided with a plurality of filter limiting protrusions.

[0011] Preferably, the inner wall of the groove is provided with filter limiting protrusions at positions corresponding to the four corners of the filter.

[0012] Secondly, the camera module of this utility model includes a circuit board, a photosensitive chip and a bracket disposed on the circuit board, a filter and a motor disposed on the bracket, and a lens disposed on the motor. The bracket adopts the bracket for reducing reflected stray light as described in this utility model.

[0013] Thirdly, the terminal device described in this utility model employs the camera module described in this utility model.

[0014] The beneficial effects of this utility model are:

[0015] (1) By setting a groove around the mounting slot on the bracket and reasonably designing the size of the groove, this utility model can effectively prevent light from being reflected by the side wall of the groove and then reflected by the inside of the filter into the chip imaging surface, thereby forming stray light imaging. At the same time, the groove guides the light that may generate stray light to be reflected to the lens barrel, thereby reducing stray light energy and reducing the risk of stray light formation.

[0016] (2) Compared with existing practices, the solution of adding only grooves without changing the filter can achieve better stray light suppression effect without increasing product manufacturing cost, thus effectively improving the product's cost performance and market competitiveness.

[0017] (3) This utility model makes full use of the 4:3 aspect ratio of the chip imaging surface, and within the size range that effectively eliminates stray light, it reduces the risk of stray light by minimizing the expansion of the groove. This design not only effectively reduces the space occupied by the groove on electronic components, providing greater flexibility for the layout of other electronic components, but also further reduces the risk of circuit board layout, improves the reliability and stability of the product, reduces signal interference and poor heat dissipation caused by unreasonable layout, and ensures that the product can operate stably in complex working environments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the chip's imaging surface.

[0019] Figure 2 This is a structural diagram of an existing camera module;

[0020] Figure 3 This is a schematic diagram illustrating stray light generated by existing camera modules;

[0021] Figure 4 This is one of the schematic diagrams illustrating the elimination of stray light by the camera module described in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the support and filter described in the embodiments of this application;

[0023] In the diagram: 1. Support body, 11. Light-passing hole, 12. Mounting slot, 13. Groove, 14. Filter limiting protrusion, 2. Filter, 3. Photosensitive chip, 4. Circuit board, 5. Lens, 6. Motor, 7. Stray light path. Detailed Implementation

[0024] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0025] like Figure 2 and Figure 3 As shown, in the design process of the camera module, typically, the distance c between the edge of the chip imaging surface and the light-transmitting hole 11 is 0.2mm; the distance b between the light-transmitting hole 11 and the edge of the filter 2 is 0.35mm; and the distance a between the edge of the filter 2 and the inner wall of the mounting groove 12 is 0.15mm. Figure 3As shown, when stray light enters the interior of the glass of filter 2, it is easily reflected multiple times within the glass. These reflected rays eventually project onto the surface of the photosensitive chip 3 (see...). Figure 3 The stray light path 7 in the image is used to form imaging stray light.

[0026] like Figure 4 As shown, to address the issue of stray light in imaging, this application provides a bracket for reducing reflected stray light. The bracket includes a bracket body 1, which comprises a first surface and a second surface facing each other. The bracket body 1 has a light-transmitting hole 11 penetrating the first and second surfaces. The first surface has a mounting groove 12 surrounding the light-transmitting hole 11; the first surface also has a recess 13 surrounding the mounting groove 12. In this application embodiment, the recess 13 is used to guide light rays that may generate stray light, reflecting them onto the lens barrel of the lens 5 (see...). Figure 4 (Stray light path 7 in the image). Because the reflectivity of the lens barrel is much lower than that of filter 2, the energy of the light is greatly reduced after reflection at the lens barrel. This process effectively reduces stray light energy and significantly reduces the risk of stray light formation.

[0027] like Figure 4 and Figure 5 As shown, in one possible embodiment, the width d of the groove 13 in the V direction is greater than or equal to 0.3 mm (d greater than or equal to 0.3 mm is obtained through simulation of a large number of projects); the width of the groove 13 in the H direction is equal to 3d / 4, this ratio can avoid stray light to the greatest extent. The H direction refers to the direction parallel to the long side of the photosensitive chip 3, and the V direction refers to the direction parallel to the short side of the photosensitive chip 3.

[0028] Taking a groove 13 with a width d of 0.3 mm in the V direction as an example, the width of the groove 13 in the V direction is 0.3 mm. Adding the distance a (0.15 mm) between the edge of the original filter 2 and the inner wall of the mounting groove 12, the distance between the edge of the filter 2 and the inner wall of the groove 13 is 0.45 mm. In the H direction, the width of the groove 13 is 0.3 * 0.75 = 0.225 mm, and the distance between the edge of the filter 2 and the inner wall of the groove 13 is 0.375 mm.

[0029] like Figure 4 As shown, in one possible embodiment, the bottom of the groove 13 is flush with the bottom surface of the mounting groove 12, that is, the groove 13 is an enlarged design based on the existing mounting groove 12, which facilitates processing.

[0030] like Figure 5As shown, in one possible embodiment, a plurality of filter limiting protrusions 14 are provided on the inner sidewall of the groove 13. Since the groove 13 is opened on the outside of the original mounting groove 12, that is, the original mounting groove 12 is enlarged, when the size of the filter 2 is not enlarged, the filter limiting protrusions 14 are needed to limit the filter 2.

[0031] In one possible embodiment, the inner sidewall of the groove 13 is provided with filter limiting protrusions 14 at positions corresponding to the four corners of the filter 2.

[0032] like Figure 4 As shown in the embodiment of the application, a camera module includes a circuit board 4, a photosensitive chip 3 and a bracket disposed on the circuit board 4, a filter 2 and a motor 6 disposed on the bracket, and a lens 5 disposed on the motor 6. The bracket adopts the bracket for reducing reflected stray light as described in this utility model. The terminal device can be a consumer electronics product such as a smartphone, tablet computer, or digital camera. As the imaging component of the terminal device, the camera module is responsible for capturing images and videos.

[0033] This is a preferred embodiment of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A bracket for reducing stray light reflection, comprising a bracket body (1), the bracket body (1) comprising a first surface and a second surface opposite to each other, the bracket body (1) having a light-transmitting hole (11) penetrating the first surface and the second surface, and the first surface having a mounting groove (12) surrounding the light-transmitting hole (11); characterized in that, The first surface is also provided with a groove (13) surrounding the mounting groove (12) and capable of reflecting stray light to the motor (6).

2. The bracket for reducing stray light reflection according to claim 1, characterized in that, The width d of the groove (13) in the V direction is greater than or equal to 0.3 mm; the width of the groove (13) in the H direction is equal to 3d / 4, where the H direction refers to the direction parallel to the long side of the photosensitive chip (3) and the V direction refers to the direction parallel to the short side of the photosensitive chip (3).

3. The bracket for reducing stray light reflection according to claim 1, characterized in that, The bottom of the groove (13) is flush with the bottom surface of the mounting groove (12).

4. The bracket for reducing stray light reflection according to claim 3, characterized in that, The inner wall of the groove (13) is provided with multiple filter limiting protrusions (14).

5. The bracket for reducing stray light reflection according to claim 4, characterized in that, The inner wall of the groove (13) is provided with filter limiting protrusions (14) at the four corners corresponding to the filter (2).

6. A camera module, comprising a circuit board (4), a photosensitive chip (3) and a bracket disposed on the circuit board (4), a filter (2) and a motor (6) disposed on the bracket, and a lens (5) disposed on the motor (6), characterized in that, The bracket is a bracket for reducing reflected stray light as described in any one of claims 1 to 5.

7. A terminal device, characterized in that, The camera module as described in claim 6 is used.

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