CN219245910U - A lens hood and on-vehicle camera support for on-vehicle camera - Google Patents

Abstract

The application relates to a hood for a vehicle-mounted camera and a vehicle-mounted camera support. The light shield includes: a cover body adapting to the field of view of the camera and an anti-dazzle part arranged on the surface of the cover body; the anti-dazzle part is located on the surface of the cover body, which faces the view of the camera, and the anti-dazzle part comprises a plurality of stripes for weakening light reflection of the surface to the camera, wherein the stripes are distributed in an annular step shape with the camera as the center. The structure can greatly weaken the imaging edge facula of the camera, weaken the influence of uneven light reflection on the imaging of the camera, and effectively improve the sensing detection success rate of the vehicle-mounted camera.

Description

A lens hood and on-vehicle camera support for on-vehicle camera

Technical Field

The application relates to the technical field of vehicle-mounted cameras, in particular to a light shield for a vehicle-mounted camera and a vehicle-mounted camera support.

Background

With the progressive development of driving assistance technology, the application of the front-view camera of the advanced driving assistance system (ADAS, advanced Driving Assistance System) on vehicles is also becoming wider, wherein with the increasing demand for technology upgrade, the horizontal field of view (HFOV, horizontal Field of View) of the front-view camera is also becoming larger, from the initial 1.3M camera HFOV 52 °, to the 2M camera HFOV 100 °, to the 8M camera HFOV 120 °, and with this, the area of adapting the HFOV in the support supporting the camera is also becoming larger.

In the prior art, the support for supporting the camera generally changes the light path of illumination by setting parallel saw-tooth steps to reduce the light reflection reflected to the camera, so as to weaken the light spot on the imaging of the camera under the condition of illumination, the mode has good effect under relatively narrow HFOV, however, as the horizontal field of view of the camera increases, as shown in FIG. 1, at the imaging edge of the camera, the light spot 1 caused by the reflection of the illumination to the camera due to the illumination to the support for supporting the camera is more and more serious.

Thus, there is a need to propose a solution to the above-mentioned flare at the imaging edge of the camera.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a hood for an in-vehicle camera and an in-vehicle camera bracket that can weaken the spot intensity of an imaging edge.

In a first aspect, a light shield for an in-vehicle camera is provided, comprising: a cover body adapting to the field of view of the camera and an anti-dazzle part arranged on the surface of the cover body;

the anti-dazzle part is located on the surface of the cover body, which faces the view of the camera, and the anti-dazzle part comprises a plurality of stripes for weakening light reflection of the surface to the camera, wherein the stripes are distributed in an annular step shape with the camera as the center.

In one embodiment, the tangential direction of each position of the stripe is perpendicular to the incident light of the corresponding camera.

In one embodiment, the stripe is circular or elliptical or arc-shaped with the camera as the center.

In one embodiment, the stripes are in a raised or recessed or concave-convex configuration relative to the surface of the mask body.

In one embodiment, the cross section of the stripe is in a zigzag structure or an arc structure or a rectangular structure.

In one embodiment, the surface of the stripe is provided with a matting layer.

In one embodiment, the matting layer is a roughened layer or a flocked layer.

In one embodiment, the cover has a trapezoid structure along the horizontal view direction of the camera.

In a second aspect, there is provided an in-vehicle camera mount, comprising: a mounting base for fixing the camera, and a light shield for the vehicle-mounted camera in any of the above embodiments.

In one embodiment, the mounting block is integrally formed with or removably attached to the light shield.

According to the light shield for the vehicle-mounted camera and the vehicle-mounted camera support, the shield body which is adaptive to the view of the camera and the anti-dazzle part which is arranged on the surface of the shield body are adopted, wherein the plurality of stripes in the anti-dazzle part are distributed in the shape of the annular ladder with the camera as the center, so that on one hand, the size of the corresponding light reflecting area at the edges of the two sides of the view of the camera is greatly reduced by the texture structure of the annular ladder, the light spot at the imaging edge of the camera is weakened, on the other hand, the sizes of the corresponding light reflecting areas in the directions of the various views of the camera are basically consistent under the texture structure of the annular ladder, the uniformity of light reflection corresponding to the edges of the two sides from the center of the view of the camera is guaranteed, the influence of the uneven light reflection on the imaging of the camera is weakened, in addition, the influence of the whole light reflection on the camera is weakened, and the vehicle-mounted camera can improve the sensing and detecting success rate.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of an imaging edge flare of a vehicle camera according to the prior art

FIG. 2 is a schematic diagram of a parallel serrated step of the prior art;

FIG. 3 is a schematic view of a reflective area in the center of the camera field under parallel saw-tooth steps in the prior art;

FIG. 4 is a schematic view of a reflective area of a camera view edge under parallel saw-tooth steps in the prior art;

FIG. 5 is a schematic view of a hood for an in-vehicle camera in one embodiment;

FIG. 6 is a schematic diagram of a light shield for an in-vehicle camera in one embodiment;

FIG. 7 is a schematic diagram of a striped planar configuration of a light shield for an in-vehicle camera in one embodiment;

fig. 8 is a schematic diagram of a striped cross-sectional structure of a light shield for an in-vehicle camera in one embodiment.

Reference numerals illustrate:

1. a light spot; 2. a cover body; 21. a camera window; 3. an anti-glare part; 31. and (3) stripes.

Detailed Description

In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Spatially relative terms, such as "under", "below", "beneath", "under", "above", "over" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments should be understood as "electrical connection", "communication connection", and the like if there is transmission of electrical signals or data between objects to be connected.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.

As described in the background art, the support for supporting the camera in the prior art has the problem of imaging edge flare, and the inventor researches find that the reason for the problem is as follows: referring to fig. 2, taking a bracket with parallel saw-tooth steps as an example, ambient light passes through a windshield of a vehicle and finally reflects to a camera after passing through the plane saw-tooth steps, wherein the parallel saw-tooth steps block part of light reflected to the camera, so that light spots in imaging of the camera are weakened, however, compared with the light reflecting areas shown in fig. 3 and 4, under the same unit view angle, the area of the light reflecting area right in front of the front view camera is much smaller than that of the light reflecting areas at two side edges, and the difference in light intensity of light reflected to the camera is caused due to the difference in the area of the light reflecting areas, so that the imaging edge of the camera is caused to have light spots, and therefore, as the horizontal view of the camera is larger, the difference in the area of the light reflecting areas is also larger, so that the light spots at the imaging edge of the camera are more and more obvious.

Based on the reasons, the utility model provides the light shield and the vehicle-mounted camera support, which can solve the problem that the light shield can be widely applied to vehicle-mounted cameras, particularly to front-view cameras of an ADAS (advanced driving assistance system), so that the intensity of the light shield at the imaging edge of the camera is effectively weakened, and the influence of the light shield on the visual perception detection of driving assistance is avoided.

In one embodiment, as shown in fig. 5, there is provided a light shield for an in-vehicle camera, comprising: a cover 2 for adapting the camera field of view, and an antiglare section 3 provided on the surface of the cover 2;

the anti-glare part 3 is located on the surface of the cover body 2 facing the camera field of view, and the anti-glare part 3 comprises a plurality of stripes 31 for weakening light reflection of the surface to the camera, wherein the stripes 31 are distributed in an annular step shape with the camera as the center.

The glare refers to the problem that the imaging of a camera generally generates glare because of the existence of reflected light influencing the imaging of the camera in the surrounding environment due to the fact that the camera is uncomfortable in vision and has a visual phenomenon of reducing the visibility of an object because of unsuitable brightness distribution or extremely bright contrast in space or time, and particularly, in the application of a vehicle-mounted camera, daily light can penetrate through a windshield of a vehicle and finally cause the imaging glare of the camera due to the reflection of various surfaces of the vehicle. Therefore, the light shield of the embodiment shields the reflected light around the vehicle-mounted camera on one hand, and weakens the reflected light on the surface of the shield on the other hand, so that the anti-dazzle effect of the vehicle-mounted camera is realized.

Specifically, referring to fig. 5, the cover 2 is a housing adapted to the field of view of the camera, the camera shoots through the shooting window 21 on the cover 2, the size of the cover 2 depends on the size of the field of view of the camera, for example, the size of an 8M camera HFOV 120 °, and the cover 2 needs to adopt a housing covering the horizontal field of view to ensure that the camera does not interfere with normal shooting. In some embodiments, the shape of the cover body 2 corresponding to the vehicle-mounted camera may generally adopt a trapezoid structure, and likewise, a fan-shaped structure may also be adopted to cover the view range of the camera, and more broadly, the cover body 2 may adopt any other structural shape capable of covering the view range of the camera.

Specifically, referring to fig. 5, the anti-glare part 3 is one or more layers of texture structures on the surface of the cover body 2, and changes the light reflection path and/or weakens the light reflection intensity through the texture structures so as to weaken the light reflection of the surface to the camera, thereby achieving the anti-glare effect, wherein the anti-glare part 3 comprises a plurality of stripes 31, the stripes 31 are distributed in an annular step shape with the camera as a center, specifically, the camera window 21 is taken as an initial position, the stripes 31 are expanded outwards step by step along the camera view direction to form a step structure, namely a step-shaped structure, and the camera window 21 is taken as a center, the stripes are expanded outwards ring by ring along the camera view direction to form a multi-ring structure, thereby forming the texture structure of the annular step.

According to the light shield for the vehicle-mounted camera, on one hand, compared with the structures shown in fig. 4 and 6, the texture structure of the annular step greatly reduces the sizes of the corresponding light reflecting areas at the edges of the two sides of the view of the camera, so that the imaging edge light spots of the camera are weakened, on the other hand, as shown in fig. 6, under the texture structure of the annular step, the sizes of the corresponding light reflecting areas in the directions of the various views of the camera are basically consistent, the uniformity of light reflection corresponding to the edges of the two sides from the center of the view of the camera is ensured, so that the influence of uneven light reflection on the imaging of the camera is weakened, in addition, the size of the continuous reflecting surface of the light reflecting area in the view of the camera is reduced in microcosmic view, the influence of the whole light reflection on the camera is weakened, and the vehicle-mounted camera can improve the sensing detection success rate.

In one example, referring to fig. 7, the tangential direction at each location of the stripe is perpendicular to the corresponding camera shooting direction.

Specifically, in some embodiments, the tangential direction of each position of the stripe may be perpendicular to the corresponding shooting direction of the camera, so as to weaken the influence of the uneven light reflection on the imaging of the camera to the greatest extent, wherein the shooting direction of the camera, that is, the connecting line direction of the current position and the center of the camera, is perpendicular to the shooting direction of the corresponding camera through the tangential direction of each position of the stripe, so that the same size of the reflective area under each unit view angle of the camera is fully ensured, the uniformity of the light reflection corresponding to the edges from the center to the two sides of the view of the camera is further ensured, and the influence of the uneven light reflection on the imaging of the camera is weakened to the greatest extent.

Specifically, in other embodiments, the tangential direction of each position of the stripe may be not perpendicular to the corresponding shooting direction of the camera, but may be a certain angle value within an angle allowable range, where the angle allowable range is determined by an area difference between reflective areas corresponding to the same unit view, and specifically, the allowable angle range may be determined according to an area difference between a reflective area corresponding to the center position of the camera view and a reflective area corresponding to the edge position of the view, so as to control the size of the reflective area corresponding to the same unit view, and avoid occurrence of imaging spots caused by overlarge part of reflective areas.

In one embodiment, the stripes are circular or elliptical or arc-shaped centered on the camera.

Specifically, in the case where the tangential direction at each position of the stripes is perpendicular to the corresponding camera shooting direction, the stripes may take on a circular shape, whereas in the case of non-perpendicular, the stripes may take on an elliptical shape or an arc shape.

In one embodiment, the stripes are in a raised or recessed or concave-convex configuration relative to the surface of the mask body.

Specifically, the stripes are raised or recessed or concave-convex relative to the surface of the cover body, and through the structures, the light reflection paths on the surface of the cover body are changed, and some light originally reflected to the camera is reflected to other directions, so that the influence on imaging of the camera is weakened. In some embodiments, referring to fig. 8, the specific stripe cross-sectional structure may be a saw tooth structure or an arc structure or a rectangular structure, and in addition, an irregular height structure may also be equally well, and more broadly, the specific stripe cross-sectional structure may take any shape with height differences.

In one embodiment, the surface of the stripe is further provided with a matting layer to weaken the light reflection intensity of the surface, wherein the surface can be roughened or flocked, the surface gloss can be reduced, and the light reflection intensity of the surface can be weakened, and the surface can also be frosted or the like.

In one embodiment, the stripes themselves may also be planar in configuration relative to the surface of the mask, wherein the planar configuration may require a matting treatment, such as roughening or flocking or sanding, to reduce the intensity of light reflected through the surface.

The present embodiment will now be described with reference to an application scenario of an on-vehicle camera, but is not limited thereto.

In vehicle-mounted camera application, the light shield adopting the structure is characterized in that on one hand, a part of ambient light is emitted into the vehicle through the windshield of the vehicle and is reflected to the back of the light shield body through each surface of the vehicle, namely, one side surface far away from the view of the camera, the part of ambient light is effectively blocked by the light shield, so that the influence of the part of light on the imaging of the camera is avoided, on the other hand, the ambient light is emitted on the surface of the cover body of the light shield through the windshield of the vehicle, the anti-dazzle part of the annular ladder arranged stripes on the surface is used, the reflection path of part of light is changed, the part of light is reflected to deviate from the direction which is originally emitted to the camera, so that the influence of the part of light on the imaging of the camera is avoided, the ambient light in all directions is basically consistent through the reflection area of the anti-dazzle part to the camera, the intensity of the light spot at the imaging edge of the camera is effectively weakened, the whole light reflection in all the directions is even, and the influence of uneven light reflection on the imaging of the camera is effectively weakened.

Based on the same inventive concept, the embodiment of the application also provides a vehicle-mounted camera bracket based on the light shield for the vehicle-mounted camera. The implementation of the solution provided by the vehicle-mounted camera bracket is similar to the implementation described in the above-mentioned light shield for the vehicle-mounted camera, so the specific limitations in the embodiments of the vehicle-mounted camera bracket or brackets provided below can be referred to above for the limitations of the light shield for the vehicle-mounted camera, and will not be repeated here.

In one embodiment, there is also provided an in-vehicle camera mount, comprising: a mount for fixing a camera, a light shield for a vehicle-mounted camera as in any one of the above embodiments, wherein the light shield includes at least: the camera comprises a cover body adapting to the view field of the camera and an anti-dazzle part arranged on the surface of the cover body, wherein the anti-dazzle part is positioned on the surface of the cover body facing to the view field of the camera and comprises a plurality of stripes used for weakening light reflection of the surface to the camera, and the stripes are distributed in an annular ladder manner with the camera as the center.

In one embodiment, the mounting base of the bracket and the light shield can be integrally formed or detachably connected, and the detachable connection mode can be convenient for adapting to the field of view of various cameras.

In one embodiment, the tangential direction at each position of the stripe is perpendicular to the incident light of the corresponding camera.

In one embodiment, the stripes are circular or elliptical or arc-shaped centered on the camera.

In one embodiment, the stripes are in a raised or recessed or concave-convex configuration relative to the surface of the mask body.

In one embodiment, the cross section of the stripe is in a zigzag or arc or rectangular configuration.

In one embodiment, the striped surface is provided with a matting layer.

In one embodiment, the matting layer is a roughened layer or a flocked layer.

In one embodiment, the cover has a trapezoid structure along the horizontal view direction of the camera.

According to the vehicle-mounted camera support, the cover body adapting to the camera view and the anti-dazzle part arranged on the surface of the cover body are adopted, wherein the plurality of stripes in the anti-dazzle part are distributed in the annular steps by taking the camera as the center, so that on one hand, the size of the corresponding light reflecting area at the edges of two sides of the camera view is greatly reduced by the texture structure of the annular steps, the imaging edge facula of the camera is weakened, on the other hand, the sizes of the corresponding light reflecting areas in the directions of all views of the camera are basically consistent under the texture structure of the annular steps, the uniformity of light reflection from the center of the camera view to the edges of the two sides is guaranteed, the influence of uneven light reflection on the imaging of the camera is reduced, in addition, the size of the continuous reflecting surface of the whole light reflecting area in the camera view is reduced on the microcosmic aspect, the influence of the whole light reflection on the camera is weakened, and the vehicle-mounted camera is applied to the vehicle-mounted camera, and the sensing detection success rate is improved.

In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A light shield for an in-vehicle camera, comprising: a cover body adapting to the field of view of the camera and an anti-dazzle part arranged on the surface of the cover body;

the anti-dazzle part is positioned on the surface of the cover body facing the view field of the camera, and comprises a plurality of stripes for weakening light reflection of the surface to the camera, wherein the stripes are distributed in an annular step shape with the camera as the center.

2. The mask for an in-vehicle camera according to claim 1, wherein a tangential direction of each position of the stripe is perpendicular to a photographing direction of the corresponding camera.

3. The mask for an in-vehicle camera according to claim 1, wherein the stripe is circular or elliptical or arc-shaped centering on the camera.

4. A light shield for a vehicle camera according to any one of claims 1 to 3, wherein the stripe is in a convex structure or a concave-convex structure with respect to a surface of the shield body.

5. The mask for an in-vehicle camera according to claim 4, wherein the cross section of the stripe has a saw tooth structure or an arc structure or a rectangular structure.

6. A light shield for an in-vehicle camera according to any one of claims 1 to 3, wherein the striped surface is provided with a matting layer.

7. The mask for an in-vehicle camera of claim 6, wherein the matting layer is a roughened layer or a flocked layer.

8. A light shield for an in-vehicle camera according to any one of claims 1 to 3, wherein the shield body has a trapezoidal structure along a horizontal view direction of the camera.

9. A vehicle-mounted camera bracket, comprising: a mount for fixing a camera, and a hood for an in-vehicle camera according to any one of claims 1 to 8.

10. The vehicle camera bracket of claim 9, wherein the mount is integrally formed with or removably connected to the light shield.

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