Lighting device and vehicle

Abstract

The utility model relates to the field of lighting devices, in particular to a lighting device and a vehicle, and aims to solve the problem that projection patterns of an existing lighting device are not uniform enough. In order to achieve the purpose, the lighting device comprises a shell, a light source arranged in the shell, a collimating lens, a screen sheet and an imaging lens assembly, and the collimating lens, the screen sheet and the imaging lens assembly are sequentially arranged from the light source side to the imaging side. The projection sheet comprises a body, a first imaging layer and a second imaging layer, the first imaging layer and the second imaging layer are arranged on two opposite sides of the body, the first imaging layer is provided with a first pattern area and a first shielding area outside the first pattern area, the second imaging layer is provided with a second pattern area and a second shielding area outside the second pattern area, the first pattern area is located at an image plane, and the second pattern area is located at an image plane. The second pattern area is provided with a light attenuation structure. The total boundary of the pattern projected by the first pattern area and the image projected by the light attenuation structure not at the image plane position are blurred, and no obvious boundary exists, so that a uniform image can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting devices of vehicles, and specifically provides a lighting device and a vehicle. BACKGROUND

[0002] In the field of lighting technology, there are relatively mature lighting lamp design schemes on the market, such as single-pattern multi-layer superposition and single-pattern multi-color superposition. These designs are applied in scenarios such as lighting devices of vehicles, stage lighting, and commercial decorative lighting, and to some extent, enrich the visual presentation effect of lighting.

[0003] However, in terms of realizing uniform and controllable projection patterns of lighting devices, the entire industry has made slow progress, and there are no mature and applicable research results and application cases. The existing lighting lamps present a spot-like lighting effect, which gives people a visual sense of pollution. Especially in some high-end car brands and car models that pursue the lighting effect of vehicles to the extreme, such projection effect is difficult to meet their design concept and quality requirements.

[0004] Correspondingly, there is a need for a new lighting device and vehicle to solve the above problems.

[0005] Application Content

[0006] The present application aims to solve the above technical problems, i.e., to solve the problem of uneven projection patterns of existing lighting devices.

[0007] In a first aspect, the present application provides a lighting device, characterized in that it comprises a housing, a light source arranged in the housing, a projection sheet, and an imaging lens assembly, the projection sheet and the imaging lens assembly being arranged in sequence from the light source side to the imaging side; the projection sheet comprises a body, a first imaging layer, and a second imaging layer, the first imaging layer and the second imaging layer being arranged on opposite sides of the body, the first imaging layer being provided with a first pattern area and a first shielding area outside the first pattern area, the second imaging layer being provided with a second pattern area and a second shielding area outside the second pattern area, the first pattern area being located at the image plane position of the lighting device, and the second pattern area being provided with a light attenuation structure.

[0008] In an optional technical solution of the above lighting device, the first pattern area and the second pattern area are edge-projection overlapped in the thickness direction of the body.

[0009] In an optional technical solution of the above lighting device, the first pattern area is located on the side close to the light source in the thickness direction of the body; or the first pattern area is located on the side away from the light source in the thickness direction of the body.

[0010] In an optional technical solution of the lighting device, the thickness of the body ranges from 0.48 mm to 0.52 mm.

[0011] In an optional technical solution of the lighting device, the light attenuation structure is arranged in the dot matrix unit.

[0012] In an optional technical solution of the lighting device, the second pattern area is provided with a first sub-area and a second sub-area, the dot matrix units in the first sub-area and the second sub-area have different densities, and the first sub-area is adjacent to the second sub-area.

[0013] In an optional technical solution of the lighting device, the dot matrix unit density of the first sub-area is greater than that of the second sub-area, and the first sub-area is located at an edge position of the second pattern area.

[0014] In an optional technical solution of the lighting device, the housing is further provided with a collimating lens, and the collimating lens is arranged between the light source and the projection sheet.

[0015] In another aspect, the application also provides a vehicle comprising the lighting device described in any of the above embodiments.

[0016] In an optional technical solution of the vehicle, the lighting device is arranged at at least one of the door, the rearview mirror, the step plate, and the rocker plate of the vehicle.

[0017] As can be understood by those skilled in the art, the lighting device of the application comprises a housing, a light source arranged in the housing, a collimating lens, a projection sheet, and an imaging lens assembly, which are arranged in sequence from the light source side to the imaging side. The projection sheet comprises a body, a first imaging layer, and a second imaging layer, the first imaging layer and the second imaging layer are arranged on opposite sides of the body, the first imaging layer is provided with a first pattern area and a first shielding area outside the first pattern area, the second imaging layer is provided with a second pattern area and a second shielding area outside the second pattern area, the first pattern area is located at an image plane position of the lighting device, and the second pattern area is provided with a light attenuation structure.

[0018] In the case of using the above technical solution, according to the imaging principle, the first pattern area at the image plane position projects a clear image, and can project the total boundary of the pattern. Since the body has a certain thickness, the second pattern area is a certain distance away from the image plane position, and the image projected by the object not at the image plane position is blurred, so the image projected by the light attenuation structure in the second pattern area is blurred and there is no obvious boundary, thereby obtaining a uniform image. BRIEF DESCRIPTION OF DRAWINGS

[0019] The preferred embodiments of the application will be described below with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic structural diagram of the lighting device of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the slide of this application;

[0022] Figure 3 yes Figure 2 Schematic diagram of the local structure at A in the middle;

[0023] Figure 4 This is a schematic diagram of the imaging principle of the lighting device of the present application;

[0024] Figure 5 This is a lighting effect diagram of the lighting device of the present application;

[0025] Figure 6 This is a lighting effect diagram of a lighting device in the prior art.

[0026] Description of reference numerals:

[0027] 1-light source; 2-collimating lens; 3-slide; 31-body; 32-first imaging layer; 321-first pattern area; 322-first shielding area; 33-second imaging layer; 331-second pattern area; 332-second shielding area; 4-imaging lens assembly; 5-lattice unit; 51-first sub-area; 52-second sub-area; 6-image plane. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will appreciate that these embodiments are intended solely to illustrate the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art may adjust these embodiments as needed to suit specific applications. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] The present application provides a lighting device for a vehicle, such as Figures 1 to 3As shown, the illumination device comprises a housing (not shown in the figure), a light source 1 arranged in the housing, a collimating lens 2, a projection sheet 3 and an imaging lens assembly 4, which are arranged in sequence from the light source 1 side to the imaging side. The projection sheet 3 comprises a body 31, a first imaging layer 32 and a second imaging layer 33, the first imaging layer 32 and the second imaging layer 33 are arranged on opposite sides of the body 31, the first imaging layer 32 is provided with a first pattern area 321 and a first shielding area 322 outside the first pattern area 321, the second imaging layer 33 is provided with a second pattern area 331 and a second shielding area 332 outside the second pattern area 331, the first pattern area 321 is located at the image plane 6 of the illumination device, and the second pattern area 331 is provided with a light attenuation structure. Possibly, the light attenuation structure is arranged as a dot matrix unit 5. The projection sheet 3 can be a film.

[0030] The body 31 can be glass, transparent plastic film or sheet, etc., such as polyester (PET) film. As for the way the first imaging layer 32 and the second imaging layer 33 are formed on the body 31, a chrome plating process can be adopted, such as first performing pretreatment such as cleaning and degreasing on the body 31 of the projection sheet 3 to improve the surface state for facilitating subsequent adhesion of the chrome plating layer, then placing it in an electrolytic tank containing chromic anhydride, taking it as the cathode and a lead plate as the anode to perform electroplating, by strictly controlling parameters such as composition, temperature, current density and electroplating time of the electroplating solution, a chrome plating layer with appropriate and uniform thickness is deposited on the surface of the projection sheet 3, then according to the design pattern, laser engraving, mechanical engraving or chemical etching is used for engraving processing, and finally after cleaning, drying and other post-processing. Of course, in addition to the chrome plating process, the present application can adopt other alternative processes, for example, screen printing process, inkjet printing process, or directly sticking the first imaging layer 32 and the second imaging layer 33 on the opposite sides of the body 31, etc.

[0031] As shown in Figure 4 , and referring to Figures 1 to 3The imaging principle of the lighting device is as follows: After light source 1 in the lighting device emits light, the light is collimated by collimating lens 2 and becomes nearly parallel light. The light then strikes projectile 3. Since the first imaging layer 32 of projectile 3 is blocked except for the first pattern area 321, and the second imaging layer 33 is blocked except for the second pattern area 331, only the first pattern area 321 and the second pattern area 331 of the first imaging layer 32 and the second imaging layer 33 of projectile 3 are transparent. Therefore, light source 1 passes through the first pattern area 321 and the second pattern area 331 (in no particular order) and carries light in the shape of the pattern area toward imaging lens assembly 4, ultimately projecting onto the projection surface to form a clear image. For example, if the pattern area is square, light will pass through the square pattern area and project a square image. Since the position of the lighting device installed on the vehicle is fixed, and the position of the projection surface such as the ground facing the light source 1 is also fixed, then the position of the focus of the lighting device (which can be a virtual focus) to the projection surface is fixed (the focus can be fixed). Therefore, the position of the image plane 6 of the lighting device from the focus can also be fixed. In this application, the first pattern area 321 is set at the image plane 6 position. According to the imaging principle, the first pattern area 321 projects a clear image and can project the total boundary of the pattern. Since the main body 31 has a certain thickness, when the first pattern area 321 is set at the image plane 6 position, the second pattern area 331 is at a certain distance from the image plane 6 position. According to the lens imaging law, the image projected by the object not at the image plane 6 position is blurred, so the image projected by the dot matrix unit 5 in the second pattern area 331 is blurred, and each point will not have a clear boundary, so that the following can be obtained. Figure 5 For example, if the target projection pattern is a gradient pattern (such as from white to light gray), the brightness of the light attenuation structure area is 80%, and the rest is 100%. The technical solution of the present application will make the light attenuation structure area appear uniformly lit. In the traditional sense, the slide 3 only has a pattern area on one side of the image plane 6, and the dot matrix unit 5 is designed in the pattern area. The projected dot matrix is ​​very clear, and the lighting effect is as follows. Figure 6 The spots shown are not uniform enough.

[0032] As a possible implementation, the projected edges of the first and second pattern areas 321, 331 overlap along the thickness direction of the body 31. This allows for a natural transition between the first and second pattern areas 321, 331, avoiding a clear dividing line or abrupt transition. This results in a more coherent and smoother projection. Furthermore, the first and second pattern areas 321, 331 can be better integrated, resulting in more uniform overall brightness.

[0033] The first pattern area 321 of the present application can be located on the side of the body 31 close to the light source 1 in the thickness direction. That is, the light source 1 first passes through the first pattern area 321 at the image plane 6, and then passes through the second pattern area 331 at the non-image plane 6. However, this is not a limitation. Alternatively, the first pattern area 321 of the present application can be located on the side of the body 31 away from the light source 1 in the thickness direction. That is, the light source 1 first passes through the second pattern area 331 at the non-image plane 6, and then passes through the first pattern area 321 at the image plane 6. These adjustments do not deviate from the principles of the present application and are within the scope of the present application.

[0034] As a possible implementation, the thickness of the body 31 is in the range of 0.48mm-0.52mm. In this thickness range, the blurring degree of the dot array area is effectively controlled, such as avoiding excessive blurring degree leading to difficulty in identifying the image information of the dot array unit 5, thus, under the premise of achieving uniform distribution of light in the entire projection area, the imaging accuracy can also be ensured. Preferably, the value is 0.5mm, and the tolerance is 0.02mm. Of course, this is only a more preferred embodiment, but it is not intended that the thickness of the body 31 of the present application must be limited to this range. In actual application, the thickness of the body 31 can be flexibly adjusted due to various factors. For example, when the characteristics of the optical material used change, such as a large difference in refractive index, in order to achieve the same imaging effect, the thickness of the body 31 can be appropriately changed.

[0035] As a possible implementation, the second pattern area 331 is provided with a first sub-area 51 and a second sub-area 52, the first sub-area 51 and the second sub-area 52 have dot matrix units 5 with different densities, and the first sub-area 51 is adjacent to the second sub-area 52. For example, the density of the dot matrix units 5 in the first sub-area 51 is greater than the density of the dot matrix units 5 in the second sub-area 52. When the light rays transition from the first sub-area 51 to the second sub-area 52, a natural brightness gradient effect is generated due to the gradual change in dot matrix density, such as gradually transitioning from relatively dark to relatively bright without obvious boundaries or abrupt changes, greatly improving the quality of the projected image. For example, the projected pattern includes a region with a brightness of 100% in addition to the first sub-area 51 and the second sub-area 52, and includes a first sub-area 51 with a brightness of 80% and a second sub-area 52 with a brightness of 90%, and the overall pattern can achieve a brightness gradient effect. It can be understood that although the present application is introduced by taking the example of the projected pattern including a region with a brightness of 100% in addition to the first sub-area 51 and the second sub-area 52, but this is not intended to limit the protection scope of the present application. For example, the entire second pattern area 331 is only composed of the first sub-area 51 and the second sub-area 52, etc., these adjustments do not deviate from the principles of the present application and are within the protection scope of the present application. In addition, alternatively, the density of the dot matrix units 5 in the first sub-area 51 is greater than the density of the dot matrix units 5 in the second sub-area 52, which can also be replaced by the density of the dot matrix units 5 in the first sub-area 51 being less than the density of the dot matrix units 5 in the second sub-area 52. These adjustments do not deviate from the principles of the present application and are within the protection scope of the present application.

[0036] As a possible implementation, the density of the dot matrix units 5 in the first sub-area 51 is greater than the density of the dot matrix units 5 in the second sub-area 52, and the first sub-area 51 is located at the edge position of the second pattern area 331. Thus, a more gentle gradient effect can be achieved, so that the projected pattern uniformly and gradually changes from dark to light starting from the boundary.

[0037] Possibly, the collimating lens 2 includes two plano-convex lenses, and the planes of the two plano-convex lenses are located on the side close to the light source 1. The first plano-convex lens preliminarily converges the divergent light rays emitted by the light source 1, reduces the divergence angle of the light rays, and starts to change to a parallel direction. The second plano-convex lens further collimates the light rays based on the first plano-convex lens, so that the light rays are closer to parallel light, and the collimation effect is improved. However, this is not a limitation, as long as the light rays emitted by the light source 1 can be collimated, the specific form can be adjusted, and the adjustment of the specific form does not deviate from the principles of the present application and is within the protection scope of the present application. For example, alternatively, the collimating lens 2 is a double-convex lens, etc.

[0038] The imaging lens assembly 4 can include multiple lenses, which can be 2-7. For example, a double convex lens, a plano-concave lens, and a plano-convex lens are arranged in sequence from the light source 1 side to the imaging side, and the like. Of course, the specific form of the imaging lens assembly 4 is not fixed, for example, the plano-concave lens is replaced by a double concave lens, the plano-convex lens is replaced by a double convex lens, and the like. Or a convex lens and a concave lens are arranged in sequence from the light source 1 side to the imaging side, so as to converge light rays through the convex lens and diverge light rays through the concave lens. For another example, a double convex lens, a plano-concave lens, a meniscus convex lens, a double concave lens, and a plano-convex lens are arranged in sequence from the light source 1 side to the imaging side, and the like. It should be noted that the above examples are only exemplary, and as long as imaging can be achieved, the specific form of the imaging lens assembly 4 can be adjusted without departing from the principles of the present application, and is within the protection scope of the present application.

[0039] As a possible implementation, the lighting device is arranged at least one of the vehicle door, the rearview mirror, the pedal and the rocker panel. Regarding the position arranged on the vehicle door: a groove with a specific shape and size can be reserved in the internal structure of the vehicle door, and the body of the lighting device is embedded in the groove, so that the lens of the lighting device is flush with or slightly recessed from the surface of the vehicle door. Regarding the position arranged on the rearview mirror: the lighting device is directly integrated into the shell of the rearview mirror, such as being located at the bottom or the side edge of the mirror shell, and the lens of the lighting device is flush with or slightly recessed from the mirror shell. Regarding the position arranged on the pedal: a space for accommodating the lighting device can be specially designed in the internal structure of the pedal of the vehicle, and the lighting device is firmly embedded in the space. Regarding the position arranged on the rocker panel: the lighting device is installed on the inner side of the rocker panel and faces the ground. The lighting device can be embeddedly installed so that the light is projected downward to the ground near the rocker panel of the vehicle. Of course, the above-mentioned installation methods are only exemplary, and as long as the lighting device can be installed thereon, the specific installation method can be adjusted without departing from the principles of the present application, and is within the protection scope of the present application.

[0040] It should be noted that although the lighting device of the present application is introduced by taking the collimating lens 2 as an example, this does not intend to limit the protection scope of the present application. For example, the collimating lens 2 can be omitted, and these adjustments do not deviate from the principles of the present application and are within the protection scope of the present application.

[0041] As an alternative implementation, although the light attenuation structure of the present application is introduced by taking the dot matrix unit 5 as an example, this does not intend to limit the protection scope of the present application, and as long as the light attenuation can be achieved, the specific form can be adjusted. For example, the dot matrix unit 5 can be replaced by spaced lines, squares or circles, and the like. These adjustments do not deviate from the principles of the present application and are within the protection scope of the present application.

[0042] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A lighting device, characterized in that: include: A housing, a light source (1) arranged in the housing, a projection sheet (3) and an imaging lens assembly (4), wherein the projection sheet (3) and the imaging lens assembly (4) are arranged in sequence from the light source (1) side to the imaging side; The projection film (3) comprises a body (31), a first imaging layer (32) and a second imaging layer (33); the first imaging layer (32) and the second imaging layer (33) are arranged on opposite sides of the body (31); the first imaging layer (32) is provided with a first pattern area (321) and a first shielding area (322) outside the first pattern area (321); the second imaging layer (33) is provided with a second pattern area (331) and a second shielding area 332 outside the second pattern area (331); the first pattern area (321) is located at the image plane (6) of the lighting device; and a light attenuation structure is provided in the second pattern area (331).

2. The lighting device according to claim 1, characterized in that The edge projections of the first pattern area (321) and the second pattern area (331) in the thickness direction of the body (31) overlap.

3. The lighting device according to claim 1 or 2, characterized in that: The first pattern area (321) is located on a side of the body (31) in the thickness direction close to the light source (1); or The first pattern area (321) is located on a side of the body (31) away from the light source (1) in the thickness direction.

4. The lighting device according to claim 1, wherein The thickness of the body (31) ranges from 0.48 mm to 0.52 mm.

5. The lighting device according to claim 1, wherein The light attenuation structure is configured as a lattice unit (5).

6. The lighting device according to claim 5, characterized in that The second pattern area (331) is provided with a first sub-area (51) and a second sub-area (52), wherein the first sub-area (51) and the second sub-area (52) have the dot matrix units (5) of different densities, and the first sub-area (51) is adjacent to the second sub-area (52).

7. The lighting device according to claim 6, characterized in that The density of the dot matrix units (5) in the first sub-area (51) is greater than the density of the dot matrix units (5) in the second sub-area (52), and the first sub-area (51) is located at the edge of the second pattern area (331).

8. The lighting device according to claim 1, wherein A collimating lens (2) is also provided in the housing, and the collimating lens (2) is provided between the light source (1) and the projection film (3).

9. A vehicle, characterized in that: The vehicle includes the lighting device according to any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The lighting device is provided at least at one of a door, a rearview mirror, a pedal and a door sill of the vehicle.

Images