CN114527619A

CN114527619A - Carpet lamp and vehicle

Info

Publication number: CN114527619A
Application number: CN202210417682.0A
Authority: CN
Inventors: 张丽; 李宝辉; 彭勃; 范晨光
Original assignee: Ningbo Fuerda Smartech Co Ltd
Current assignee: Ningbo Fuerda Smartech Co Ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-05-24
Anticipated expiration: 2042-04-21
Also published as: CN114527619B

Abstract

The invention discloses a carpet lamp and a vehicle, wherein the carpet lamp obliquely irradiates the surface of an object to form a projection pattern, the projection pattern comprises a near lamp end and a far lamp end, and comprises a light source component, a condenser lens component, a deflection lens component, a film component and an imaging component; the light-gathering lens assembly is arranged at the downstream of the light path of the light source assembly, the deflection lens assembly is arranged at the downstream of the light path of the light-gathering lens assembly, the film assembly is arranged at the downstream of the light path of the deflection lens assembly, and the imaging assembly is arranged at the downstream of the light path of the film assembly; the deflection lens assembly deflects the light rays passing through the condenser lens assembly towards a preset deflection direction, the deflection angle of the light rays is gradually increased according to the preset deflection direction, and part of the light rays are deflected out of the receiving range of the film assembly for the light rays; the deflection of the light rays by the deflecting lens assembly makes the reduction of the illumination intensity of the projection pattern more larger as the projection pattern is closer to the lamp end. By adding the deflection lens assembly, the projection pattern generated by the invention has good uniformity and high definition.

Description

Carpet lamp and vehicle

Technical Field

The invention relates to the technical field of projection, in particular to a carpet lamp and a vehicle.

Background

As automotive carpet lights become more popular, automotive manufacturers and consumers are increasingly demanding and are required to project larger patterns (e.g., 2m long), but too large a pattern is accompanied by certain drawbacks. In order to obtain a large-size pattern due to space or installation restrictions, a projected pattern on the ground can only be formed by oblique projection, but when a carpet lamp installed on a vehicle rearview mirror or a door sill is obliquely irradiated to the ground, the projected pattern has a problem of uneven illumination of the pattern with high near-end brightness and low far-end brightness due to a small included angle (e.g., 30 °) between an optical axis and the ground. Referring to fig. 1 to 4, a conventional carpet light as shown in fig. 1 comprises, in order along an optical axis: light source subassembly 1, condenser lens subassembly 2, film subassembly 4, formation of image subassembly 5. After the illumination light beam emitted by the light source 1 passes through the collimation illumination component 2, a collimation light spot with uniform illumination is formed, and after the collimation light spot passes through the film component and the imaging component 5 and is amplified and imaged, the illumination light beam finally shines on the ground, and the light path transmission is as shown in fig. 2. As shown in fig. 3, the illuminance distribution of the conventional carpet light on the image plane perpendicular to the optical axis is uniform, but due to the oblique illumination, the area of the image plane perpendicular to the optical axis on which the illuminance is projected onto the ground varies, eventually resulting in a situation where the near-end luminance is high and the far-end luminance is low, as shown in fig. 4.

Utility model patent No. CN207146280U also discloses an automobile welcome lamp. The utility model discloses a car usher lamp, including lamp part, little mirror array and prism, the light that this lamp part sent loops through little mirror array and prism and launches out and form the light pattern, and this utility model still includes integrating rod and brightness enhancement film. The included angle between the incident light and the micro-mirror array is 30-60 degrees, and the value range of the included angle enables the welcome lamp arranged at any position of the chassis to enable the light pattern to fall on the reasonable position of the whole body of the automobile; the distance from the lamp component to the micro-reflector array along the central axis of the integrating rod is 50mm, and the distance value of 50mm enables a light ray pattern formed on the ground to meet the brightness requirement. In the application, the included angle between the optical axis and the ground is small, the patterns are relatively uniform, and the module is large in size, high in cost and complex in structure.

Disclosure of Invention

The invention provides a carpet lamp and a vehicle aiming at the defects in the prior art.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a carpet lamp is obliquely irradiated on the surface of an object to form a projection pattern, wherein the projection pattern comprises a near lamp end and a far lamp end and comprises a light source component, a light-gathering lens component, a deflection lens component, a film component and an imaging component;

the light-gathering lens assembly is arranged at the downstream of the light path of the light source assembly, the deflection lens assembly is arranged at the downstream of the light path of the light-gathering lens assembly, the film assembly is arranged at the downstream of the light path of the deflection lens assembly, and the imaging assembly is arranged at the downstream of the light path of the film assembly;

the deflection lens assembly deflects the light rays passing through the condenser lens assembly towards a preset deflection direction, the deflection angle of the light rays is gradually increased according to the preset deflection direction, and part of the light rays are deflected out of the receiving range of the film assembly for the light rays;

the deflection lens assembly deflects the light rays so that the closer the projection pattern is to the lamp-near end, the larger the reduction of the illumination intensity is.

As one possible embodiment, the deflection lens assembly is a deflection lens;

the deflection lens comprises a deflection surface, and the deflection surface comprises a non-deflection area, a deflection area and a over-deflection area which are sequentially connected;

the deflection angle of the non-deflection area to the light deflection is equal to zero;

taking the boundary between the non-deflection area and the deflection area as a starting boundary and taking the boundary between the deflection area and the over-deflection area as an ending boundary;

the deflection angle of the deflection region for light deflection gradually increases from the starting boundary to the ending boundary;

the deflection angle of the over deflection area to the light deflection is not less than the maximum value of the deflection angle of the deflection area to the light deflection.

In one embodiment, when a closest point of the deflection surface to the surface of the object is denoted as an S point and a height of the S point from the surface of the object is denoted as h, the method includes: h is more than or equal to 200mm and less than or equal to 1500 mm.

As an embodiment, the deflection lens further comprises a non-deflection surface; the deflection surface is a curved surface, and the non-deflection surface is a plane, a curved surface, an arc surface or a micro-lens array surface.

As an implementation manner, the number of lenses in the condenser lens assembly is at least 1.

As an implementable mode, the angle between the optical axis of the light source component and the surface of the object is theta, and the angle is more than or equal to 15 degrees and less than or equal to 90 degrees.

As an implementation, the condenser lens assembly includes an illumination lens group; the light forms collimated and uniform light through the lighting mirror group.

As an implementation, the imaging assembly includes at least 1 imaging lens.

As one possible implementation, the material of the condenser lens assembly, the deflection lens assembly and the lens in the imaging assembly is plastic or glass.

A vehicle comprising a carpet light as described above.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that:

the light rays are deflected through the deflection lens assembly, the deflection angle of the light rays close to the far lamp end to the direction of the near lamp end is smaller, and the deflection angle of the light rays close to the near lamp end to the direction of the near lamp end is larger; the deflection angle of the light rays is larger as the distance from the lamp end is closer, and a certain proportion of the light rays are deflected beyond the range of the film assembly, so that the light rays cannot enter the imaging lens through the film assembly, but the final projection pattern can still be complete. Forming a film pattern after passing through the film assembly, wherein the decrease of the luminous flux of the unit film pattern at the far lamp end is smaller, and the decrease of the luminous flux of the unit film pattern at the near lamp end is larger; further, the decrease amount of the luminous flux of the unit dummy pattern at the lamp end is smaller, and the decrease amount of the luminous flux of the unit dummy pattern at the lamp end is larger; finally, the reduction of the illuminance of the unit projection pattern at the far lamp end is smaller, and the reduction of the illuminance of the unit projection pattern at the near lamp end is larger, so that the illuminance proportion of the unit projection pattern at the near lamp end and the unit projection pattern at the far lamp end approaches, and the effect of more uniform complete projection patterns is achieved.

In addition, the carpet lamp has good uniformity of the projection pattern and high definition of the projection pattern; small size, simple structure, easy processing, low cost and suitability for large-scale production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a conventional carpet light of the background art.

Fig. 2 is a schematic diagram of the optical path propagation of a conventional carpet light of the background art.

Fig. 3 is a schematic view of illuminance distribution on an image plane perpendicular to an optical axis of a conventional carpet lamp in the related art.

FIG. 4 is a schematic view of the illuminance distribution of a ground projection pattern of a conventional carpet light of the prior art at an angle to the optical axis.

Fig. 5 is a schematic view of the entire structure of embodiment 1.

Fig. 6 is a schematic diagram of the optical path propagation of embodiment 1.

Fig. 7 is a schematic structural diagram of the deflecting lens assembly in embodiment 1.

FIG. 8 is a schematic view of a deflection lens assembly of FIG. 10 in accordance with another embodiment.

Fig. 11 is a schematic view of the illuminance distribution on the image plane perpendicular to the optical axis of the carpet lamp of example 1.

Fig. 12 is a schematic view of the illuminance distribution of the floor projection pattern of the carpet lamp of example 1.

FIG. 13 is a graph showing the comparison of the simulated illumination uniformity data of the carpet lights of the present invention with the projected pattern data of the conventional carpet lights.

Reference numbers in the drawings illustrate:

1. a light source assembly; 2. a condenser lens assembly; 3. a deflecting lens assembly; 4. a film component; 5. an imaging assembly; 31. a light incident surface a; 32. a light emitting surface a; 33. a light incident surface b; 34. a light emitting surface (b); 35. a light incident surface c; 36. a light emitting surface c; 37. a light incident surface d; 38. a light emitting surface d; 101. a lamp-proximal end; 102. a distal lamp end; 106. a surface of the object; 108. a dummy pattern; 109. the pattern is projected.

Detailed Description

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

Example 1:

a carpet lamp, as shown in FIGS. 5-13, is obliquely illuminated on an object surface 106 to form a projection pattern 109, the projection pattern includes a near lamp end 101 and a far lamp end 102, the carpet lamp includes a light source module 1, a condenser lens module 2, a deflection lens module 3, a film module 4 and an imaging module 5; the condenser lens assembly 2 is arranged at the downstream of the light path of the light source assembly 1, the deflection lens assembly 3 is arranged at the downstream of the light path of the condenser lens assembly 2, the film assembly 4 is arranged at the downstream of the light path of the deflection lens assembly 3, and the imaging assembly 5 is arranged at the downstream of the light path of the film assembly 4; the deflection lens component 3 deflects the light rays passing through the condenser lens component 2 to a preset deflection direction, the deflection angle of the light rays is gradually increased according to the preset deflection direction, and part of the light rays are deflected out of the receiving range of the film component 4 to the light rays; the deflection of the light rays by the deflecting lens assembly 3 results in a greater reduction in the amount of illumination as the projected pattern approaches the distal lamp end 102.

In the present invention, the pattern perpendicular to the optical axis is referred to as a virtual pattern 108 (actually, the cross section of the virtual pattern in fig. 6 should be a circular arc with a small arc, and for the sake of explanation and understanding, the circular arc is approximated to a straight line, and such a modification does not affect the actual result), and the pattern formed by projection on the ground is referred to as a projection pattern. Generally, a complete pattern can be regarded as being composed of a plurality of unit patterns, and since the virtual pattern and the projected pattern are objectively corresponding, each unit virtual pattern and each unit projected pattern are also corresponding; when the carpet lamp is normally and vertically projected, the surface of the object is parallel to the virtual pattern, and the distance between the carpet lamp and the ground is unchanged, so that the area ratio of the unit virtual pattern to the unit projected pattern is the same or nearly the same; since the luminous fluxes of the unit dummy patterns of the dummy patterns perpendicular to the optical axis are uniform, the illuminance of each unit projection pattern corresponding to each unit dummy pattern is uniform, and the entire projection pattern is uniform as a whole. However, when the carpet light is projected obliquely, such as the angle shown in fig. 6, because the surface of the object forms a certain included angle with the virtual pattern, the area of the unit projection pattern corresponding to each unit virtual pattern is not consistent, the area of the unit projection pattern corresponding to the unit virtual pattern at the far end of the carpet light is larger, and the area of the unit projection pattern corresponding to the unit virtual pattern at the near end of the carpet light is smaller; since the luminous fluxes of the respective unit dummy patterns of the dummy patterns perpendicular to the optical axis are uniform, the illuminance of the unit projection pattern at the lamp end becomes smaller and the illuminance of the unit projection pattern at the lamp end becomes larger. The whole projection pattern is very bright at the near lamp end and very dark and uneven at the far lamp end. It should be noted that the projected pattern has a near lamp end and a far lamp end, and similarly, the virtual pattern, the deflection lens, and the position of the film assembly corresponding to the projected pattern can be considered to have a near lamp end and a far lamp end.

In this embodiment, the addition of the deflecting lens assembly 3 is to redistribute the luminous fluxes of the unit virtual patterns 108 at different positions, so that the ratio of the illuminance of the unit projection pattern at the near lamp end 101 to that of the unit projection pattern at the far lamp end 102 approaches, that is, the illuminance of all the projection patterns is more uniform, and the brightness of the complete projection pattern is more uniform as a whole. Therefore, the deflecting lens assembly 3 further functions to reduce the luminous flux of the unit dummy pattern 108 near the lamp end, and the luminous flux reduction of the unit dummy pattern 108 near the lamp end is larger, and the luminous flux reduction of the unit dummy pattern 108 far from the lamp end is smaller or even not reduced, so that the brightness of the whole projection pattern is more uniform as a whole.

After the light source component 1 emits light, light rays enter the condenser lens component 2 to form collimated light spots with uniform illumination, the collimated light spots are incident into the deflection lens component 3, the incident light rays are deflected through the deflection lens component 3 arranged on the upstream of the light path of the film component 4, the deflection angle of the light rays close to the far lamp end to the direction of the near lamp end is smaller, and the deflection angle of the light rays close to the near lamp end to the direction of the near lamp end is larger; as the deflection angle of the light beam is larger closer to the far lamp end, and due to the action of deflection, a certain proportion of the light beam is deflected out of the receiving range of the film assembly 4, the light beam cannot enter the imaging assembly 5 through the film assembly 4, and other residual light beams all enter the film assembly 4 to form a film image. Because of the light deflection effect of the deflection lens assembly 3, the decrease amount of the light flux of the unit film pattern at the far lamp end is smaller, and the decrease amount of the light flux of the unit film pattern at the near lamp end is larger (the contrast is the contrast between the scheme with the deflection lens assembly 3 and the scheme without the deflection lens assembly 3); further, the amount of decrease in luminous flux of the unit dummy pattern 108 forming the farther lamp end is smaller, and the amount of decrease in luminous flux of the unit dummy pattern 108 forming the closer lamp end is larger; finally, the reduction of the illuminance of the unit projection pattern 109 at the far lamp end 102 is smaller, and the reduction of the illuminance of the unit projection pattern 109 at the near lamp end 101 is larger, so that the ratio of the illuminance of the unit projection pattern 109 at the near lamp end 101 to that of the unit projection pattern 109 at the far lamp end 102 approaches, and the effect of making the complete projection pattern 109 more uniform is achieved.

In this embodiment, the deflecting lens assembly 3 is a deflecting lens; the deflection lens comprises a deflection surface, and the deflection surface comprises a non-deflection area, a deflection area and a over-deflection area which are sequentially connected; the deflection angle of the non-deflection area to the light deflection is equal to zero; taking a boundary between the non-deflection area and the deflection area as an initial boundary and taking a boundary between the deflection area and the over-deflection area as an ending boundary; the deflection angle of the deflection area to the light deflection gradually increases from the initial boundary to the ending boundary; the deflection angle of the light deflection by the over deflection area is not less than the maximum value of the deflection angle of the light deflection by the deflection area.

The description is made with reference to fig. 5 and 6: when the closest point of the deflection surface to the object surface 106 is denoted as S point, the farthest point is denoted as T point, the boundary between the non-deflection region and the deflection region is denoted as starting boundary, the intersection between the starting boundary and the deflection surface is denoted as a point a, the boundary between the deflection region and the over-deflection region is denoted as ending boundary, and the intersection between the ending boundary and the deflection surface is denoted as B point, the angle of the SA segment to the light deflection is equal to 0, and herein, exactly, is equal to zero, and certainly, is equal to zero, but in the practical embodiment, is not equal to 0, but has a certain error, for example, less than 2 degrees or less than 1 degree. The deflection angle of the AB section to the light deflection is gradually increased from the point A to the point B, the angle of the BT section to the light deflection is gradually increased from the point B to the point T, the deflection angle is not smaller than the deflection angle of the AB section to the light deflection, the BT section belongs to the over-deflection area, and the part directly deflects the light out of the receiving range of the film component 4 to the light.

In addition, in one embodiment, if the point S is taken as the origin of coordinates, the optical axis is taken as the y ' axis, and the positive direction of the x ' axis is directed away from the horizontal plane, then in the positive direction of the x ' axis, the deflection angle α of the deflection area to the incident light gradually increases, and then α is 0 ° or more and 35 ° or less.

In a specific embodiment, the height of the S point from the object surface 106 is denoted as h, and there are: h is more than or equal to 200mm and less than or equal to 1500 mm. In practice, this height is the optimum height, although other heights may be realized, but the technical effect is not as good as the range of heights.

In this embodiment, the deflection lens further includes a non-deflection surface, the light incident surface a31 is a non-deflection surface, the light emergent surface a32 is a deflection surface, wherein the non-deflection surface is a plane, and the deflection surface is a curved surface, as shown in fig. 7.

In other embodiments, the light incident surface is a deflection surface, the light emitting surface is a non-deflection surface, wherein the deflection surface is a curved surface, and the non-deflection surface is one of a plane, a curved surface, a cambered surface, or a microlens array surface, and the specific structure can also be referred to fig. 8 to fig. 10.

Fig. 8 shows a structure of a deflection lens according to the present invention, in which a light incident surface b33 is a deflection surface, a light emergent surface b34 is a non-deflection surface, and the deflection surface is a curved surface and the non-deflection surface is a plane surface.

Fig. 9 also shows a structure of the deflection lens of the present invention, in which the light incident surface c35 is a deflection surface, the light emergent surface is a non-deflection surface c36, the deflection surface is a curved surface, and the non-deflection surface is a free-form surface.

Fig. 10 also shows a structure of the deflection lens of the present invention, in which the light incident surface d37 is a deflection surface, the light emergent surface is a non-deflection surface d38, the deflection surface is a curved surface, and the non-deflection surface is a microlens array surface.

In this embodiment, the number of lenses in the condenser lens assembly is 1, and the number of lenses may be actually set according to needs, for example, the number of lenses may also be 2, 3, 4, 5 or more.

In the present embodiment, the condenser lens assembly 2 includes an illumination lens group; the light forms collimated and uniform light through the lighting mirror group. In the invention, the condenser lens is used for converting light rays into collimated light spots with uniform illumination, the characteristics of the condenser lens all meet the condition, and the shape and the like of the condenser lens are not limited.

In one embodiment, the angle between the optical axis of the light source assembly 1 and the object surface 106 is θ, and 15 ° ≦ θ < 90 ° since the carpet lamp of the present invention is obliquely illuminated to the object surface 106, θ is not 90 degrees.

In this embodiment, the imaging assembly 5 includes imaging lenses, and the number of the imaging lenses is 1, which may be actually set according to needs, for example, 2, 3, 4, 5 or more.

In this embodiment, the material of the lenses in the condenser lens assembly 2, the deflecting lens assembly 3 and the imaging assembly 5 is plastic or glass, but other materials may be actually selected according to the requirement.

An illuminance distribution diagram is drawn based on a conventional carpet lamp and the carpet lamp of the present invention, the conventional carpet lamp can be seen in fig. 3-4, and the present embodiment can be seen in fig. 11-12. In addition, the illumination uniformity data of the projected patterns of the carpet lamp and the conventional carpet lamp are obtained through simulation calculation, and a comparison schematic diagram of the illumination uniformity data of the projected patterns of fig. 13 is drawn according to the following table. The illumination uniformity of the carpet lamp and the illumination uniformity of the traditional carpet lamp are both 100% at the position of 100mm of the projection pattern from the starting point by taking the near lamp end 101 as the starting point of the projection image; at the position of 500mm of the projection pattern, the illuminance uniformity of the carpet lamp is 88 percent, and the illuminance uniformity of the traditional carpet lamp is 34 percent; at the position of 1000mm of the projection pattern, the illuminance uniformity of the carpet lamp is 43.3%, and the illuminance uniformity of the traditional carpet lamp is 14.6%; at the position of 1500mm of the projection pattern, the illuminance uniformity of the carpet lamp is 25%, and the illuminance uniformity of the traditional carpet lamp is 8.5%; at a position of 2000mm of the projected pattern, the uniformity of illuminance of the carpet lamp of the present invention was 18.7%, and the uniformity of illuminance of the conventional carpet lamp was 5.9%. Through comparison, the illuminance uniformity of the carpet lamp is obviously improved compared with that of the traditional carpet lamp at each position of the projection pattern.

Uniformity(100%)	B1@100mm	B2@500mm	B3@1000mm	B4@1500mm	B5@2000mm
						The invention provides a carpet lamp	100.0%	88.1%	43.3%	25.4%	18.7%
Traditional carpet light	100.0%	34.4%	14.6%	8.5%	5.9%

Example 2:

a vehicle comprising a carpet light as described in the above embodiments.

Of course, in practical cases, the carpet light of the invention can also be used in road lighting or shop advertising or carpet lights to obtain a uniformly illuminated spot.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the invention which are described in the patent conception of the invention are included in the protection scope of the patent of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A carpet lamp is obliquely irradiated on the surface of an object to form a projection pattern, wherein the projection pattern comprises a near lamp end and a far lamp end, and is characterized by comprising a light source component, a light-gathering lens component, a deflection lens component, a film component and an imaging component;

the light-gathering lens component is arranged at the downstream of the light path of the light source component, the deflection lens component is arranged at the downstream of the light path of the light-gathering lens component, the film component is arranged at the downstream of the light path of the deflection lens component, and the imaging component is arranged at the downstream of the light path of the film component;

the deflection of the light rays by the deflection lens component enables the reduction amount of the illumination intensity of the projection pattern to be larger as the projection pattern is closer to the lamp end.

2. The carpet light of claim 1, wherein the deflecting lens assembly is a deflecting lens;

the deflection angle of the over-deflection region for deflecting the light rays is not less than the maximum value of the deflection angle of the deflection region for deflecting the light rays.

3. The carpet light of claim 2, wherein the closest point of the deflection surface to the surface of the object is denoted as S point, and the height of the S point from the surface of the object is denoted as h, then: h is more than or equal to 200mm and less than or equal to 1500 mm.

4. A carpet light according to claim 2 or 3, characterized in that the deflecting lens further comprises a non-deflecting face; the deflection surface is a curved surface, and the non-deflection surface is a plane, a curved surface, an arc surface or a micro-lens array surface.

5. The carpet light of claim 4, wherein the number of lenses in the condenser lens assembly is at least 1.

6. The carpet light of claim 1, characterized in that the angle between the optical axis of the light source assembly and the surface of the object is θ, and 15 ° ≦ θ < 90 °.

7. The carpet light of claim 1, wherein the condenser lens assembly comprises an illumination lens group; the light forms collimated and uniform light through the lighting mirror group.

8. The carpet light of claim 1, characterized in that the imaging assembly comprises imaging lenses, the number of which is at least 1.

9. The carpet light of claim 1, wherein the material of the condenser lens assembly, the deflecting lens assembly and the lens of the imaging assembly is plastic or glass.

10. A vehicle, characterized in that: comprising a carpet light according to any of claims 1 to 9.