Light band projection lamp cooperating with self-closed loop vehicle lamp

Abstract

The invention discloses a light band projection lamp cooperating with a self-closed loop vehicle lamp, comprising: a light source emitting an X-direction light beam and a Y-direction light beam; the lens group is sequentially provided with a first lens and a second lens from the object plane to the image plane; the Y-direction light beam is collimated and converged in the height direction through the first lens and the second lens, and the X-direction light beam is diffused and superposed in the length direction through the first lens and the second lens; the first lens comprises a surface S1 and a surface S2, the second lens comprises a surface S3 and a surface S4, and the surface S2 and the surface S3 are oppositely arranged at an interval and are both of an asymmetrical surface type. According to the light band projection lamp cooperating with the self-closed-loop vehicle lamp, light band projection with the ultra-large field angle can be achieved, the sharp boundary and the extremely high length-width ratio are achieved, the system is simple, and cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to a light band projection lamp coordinated with a self-closed loop vehicle lamp. Background Art

[0002] A circle of light is projected around the vehicle body to display the boundaries of the vehicle body, or used as a camping ruler. In order to cover the periphery of the vehicle body, the field of view may reach more than ±50°. In the existing technical solutions, linear lasers can meet the graphic requirements very well, but their color cannot achieve white and cannot meet the safety requirements of the human eye; other solutions such as film projection, due to the large aspect ratio of the graphic, the film pattern is a long and thin straight line, the overall optical efficiency will be very low, and the field of view angle is difficult to reach more than ±50°. The overall light efficiency is low, and it cannot meet the large-angle projection. At the same time, the system is more complicated.

[0003] For example, the ADB headlight solution described in CN118757708A utilizes an array LED combined with a silicone light guide column to project the shape of the light source. However, if a slender straight line projection is to be achieved, a large number of LEDs are required, which inevitably leads to problems of large size and complex structure, and there are still disadvantages such as insufficient field of view. Summary of the invention

[0004] The technical problem to be solved by the present invention is: the present invention provides a light strip projection lamp that cooperates with a self-closed loop vehicle lamp, which can realize light strip projection with an ultra-large field of view, has sharp boundaries and an extremely high aspect ratio, and has a simple system and low cost.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a light band projection lamp coordinated with a self-closed loop vehicle lamp, comprising: a light source, the light source emits an X-direction light beam and a Y-direction light beam; a lens group, the lens group is provided with a first lens and a second lens in sequence from the object plane to the image plane; the Y-direction light beam is collimated and converged in the height direction by the first lens and the second lens, and the X-direction light beam is diffused and superimposed in the length direction by the first lens and the second lens; the first lens includes a surface S1 and a surface S2, the second lens includes a surface S3 and a surface S4, the surface S2 and the surface S3 are arranged relatively spaced apart and are asymmetric surface types.

[0006] Furthermore, in order to achieve a clear boundary and converge light sources in all directions into the light band, the first lens has a negative focal length f1y in the Y direction and a positive focal length f1x in the X direction; the second lens has a positive focal length f2y in the Y direction and a negative focal length f2x in the X direction, and |f1y / f2y| is 0.5-5, and |f1x / f2x| is 0.6-1.6.

[0007] Furthermore, in order to control the emission direction of the light, the surface S2 bulges from the left and right sides toward the center in the X direction, and first bulges and then sinks from the left and right sides toward the center in the Y direction.

[0008] Furthermore, in order to control the emission direction of the light, the surface S3 is concave from the left and right sides toward the center in the X direction, and is convex from the upper and lower sides toward the center in the Y direction.

[0009] Furthermore, in order to control the emission direction of light, the surface S1 and the surface S4 are non-concave surfaces.

[0010] Furthermore, in order to ensure that the outer surface is easy to clean, the surface S1 and the surface S4 are planes.

[0011] Furthermore, the X-ray beam with an incident angle of less than 40° is emitted in a direction that deviates less than the original direction after passing through the first lens and the second lens, and the deviation angle is less than ±2°. The X-ray beam with an incident angle of more than 40° has its exit angle increased or decreased relative to the incident angle after passing through the first lens and the second lens, and the deviation angle is less than ±5°.

[0012] Furthermore, in order to improve the edge illumination, a diffusion plate is arranged in parallel behind the surface S4, and a cylindrical lens is provided on the diffusion plate facing the surface S4.

[0013] Furthermore, in order to disperse the light beam with stronger energy in the center to both sides of the light band, the cylindrical lenses are symmetrically distributed in the X direction, and the curvature is gradually gentle from the center to the edge.

[0014] Furthermore, in order to adjust the length of the light band, a structure for shielding light is provided behind the edge of the surface S4.

[0015] Furthermore, in order to increase the brightness of the light band, the light source is a group of LED arrays, and the LED array includes a plurality of LED lamps.

[0016] The LED lights are arranged at intervals along the X direction, and the colors of the LED lights are 1-5.

[0017] The light strip projection lamp realizes self-closed-loop control through an algorithm processing module and a perception module, thereby automatically projecting light strips of different colors according to the scene.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the light band projection lamp coordinated with the self-closed loop vehicle lamp of the present invention, the surface S2 and the surface S3 adopt an asymmetric lens design to realize the light band continuous projection of the non-continuous LED array with an ultra-high aspect ratio.

[0020] The light band projection lamp coordinated with the self-closed loop vehicle lamp of the present invention adopts a diffusion plate to realize the diffusion of the light band energy from the center to both sides, which can greatly improve the edge illumination.

[0021] The light band projection lamp of the present invention cooperates with the self-closed loop vehicle lamp, and the length of the light band is adjusted by shielding the edge of the outer surface by a structural member.

[0022] The light strip projection lamp coordinated with the self-closed loop vehicle lamp of the present invention adopts a group of LED arrays composed of multiple LEDs as a light source, has low requirements on the position accuracy of the LEDs, and can greatly reduce the difficulty of processing and assembly.

[0023] The light strip projection lamp of the present invention cooperates with the self-closed loop vehicle lamp, and can realize color-variable color light strip projection by forming an array of LEDs of different colors. By combining with a perception module and an algorithm processing module, self-closed loop control of the light strip projection lamp can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a structural schematic diagram of a light band projection lamp cooperating with a self-closed loop vehicle lamp of the present invention;

[0026] Figure 2 is a schematic diagram of the three-dimensional structure of the first lens;

[0027] Figure 3 is a schematic diagram of the three-dimensional structure of the second lens;

[0028] Figure 4 It is a schematic diagram of the X-direction light beam passing through the lens group;

[0029] Figure 5 It is a schematic diagram of the Y-direction light beam passing through the lens group;

[0030] Figure 6 is the energy distribution diagram of the light band passing through the lens group;

[0031] Figure 7 is a schematic diagram of the three-dimensional structure of the diffusion plate;

[0032] Figure 8 for Figure 7 Schematic diagram of the local structure;

[0033] Fig. 9 Schematic diagram of the effect of the diffuser on the X-axis beam;

[0034] Fig.10 It is the energy distribution diagram of the light band passing through the lens group and the diffuser;

[0035] Fig.11 It is a schematic diagram of the effect of the structural parts on the X-axis beam;

[0036] Fig.12 This is the energy distribution diagram of the light band after being blocked;

[0037] Fig.13 is the arrangement of the LED array;

[0038] Fig.14 Another arrangement of LED arrays;

[0039] Fig.15 It is a flow chart of the self-closed loop control of the light strip projection lamp;

[0040] In the figure: 1. light source, 11. white light LED, 12. yellow light LED, 13. red light LED, 14. green light LED, 15. blue light LED, 2. first lens, 3. second lens, 4. diffusion plate, 401. cylindrical lens, 5. X-direction beam, 5a. small-angle X-direction beam, 5b. large-angle X-direction beam, 6. Y-direction beam, 7. structural parts. DETAILED DESCRIPTION

[0041] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] like Figure 1 As shown, a light strip projection lamp coordinated with a self-closed loop vehicle lamp comprises: a light source 1 and a lens group. The light source 1 is a group of LED arrays, and the LED array comprises a plurality of LED lamps. In this embodiment, five LEDs are arranged at a certain interval as the light source 1, and the light source 1 emits an X-direction light beam 5 and a Y-direction light beam 6.

[0045] like Figure 2 and Figure 3 As shown, the lens group is provided with a first lens 2 and a second lens 3 in sequence from the object plane to the image plane. The first lens 2 includes a surface S1 and a surface S2. The second lens 3 includes a surface S3 and a surface S4. Surfaces S2 and S3 are arranged at a relative interval, and both are double-cone Zernike surface types. Surface S2 convexes from the left and right sides to the center in the X direction, and convexes first and then concave from the left and right sides to the center in the Y direction. Surface S3 is concave from the left and right sides to the center in the X direction, and convexes from the upper and lower sides to the center in the Y direction. The asymmetric surface type used in the embodiment of the present invention is a double-cone Zernike surface type, which can provide more free variables for optimizing the overall aberration. The X direction is an afocal system, which basically does not change the propagation direction of the light beam, and uses the divergent light of the LED at various angles to achieve a large widening, so as to realize the length of the light band. The arrangement spacing of the LED in this direction has a large tolerance. The Y direction is a collimation system, which makes the light beam of the LED highly collimated in this direction, forming a sharp boundary and a very narrow width. Using this system, a light band with a length-to-width ratio greater than 18:1 can be achieved using fewer LEDs.

[0046] Surface S1 and surface S4 are non-concave surfaces. In this embodiment, preferably surface S1 and surface S4 are flat surfaces, which can ensure easy installation and easy cleaning.

[0047] like Figure 4 As shown, in the X direction, the light beams at different angles emitted by the LED can be regarded as a group of parallel light beams, and the X-direction light beam 5 is diffused and superimposed in the length direction through the first lens 2 and the second lens 3. The lens group is an afocal system in the X direction, such as Figure 4 As shown, the small-angle X-direction light beam 5a (incident angle < 40°) deviates from the original direction at a small angle, and the deviation angle does not exceed ±2°, while the large-angle X-direction light beam 5b (incident angle > 40°) deviates from the original light beam at a large angle, and the deviation angle is less than ±5°. Light beams of different angles are projected and superimposed in the X-direction, thereby meeting the length requirement of the light strip. According to the projection characteristics in the X-direction, the arrangement spacing of the LED array is not critical, so the system has a high installation tolerance.

[0048] Since the surface area through which the large-angle light beam passes has a higher degree of freedom, the actual emission direction of the large-angle light beam can be controlled through the surface shape. The increased or decreased angle is approximately within ±5°. Increasing the angle is to achieve a longer length; decreasing the angle is to shorten the length and increase the brightness. It can be set according to specific needs.

[0049] like Figure 5 As shown, the Y direction is a collimating system with a certain focal length. The light beam 6 passes through the first lens 2 and the second lens 3 to be collimated and converged in the height direction. The light beam 6 in the Y direction is a highly collimated light beam, and its projection in the Y direction after propagating forward will have a very small width.

[0050] like Figure 6 As shown, the pattern formed by the light beam emitted by the LED array after being modulated by the first lens 2 and the second lens 3 is a light band with a length greater than 10m and a width less than 0.3m.

[0051] A single cylindrical surface cannot modulate an obliquely incident light beam into a narrow light band in the Y direction. In order to achieve a clear boundary, the surfaces S2 and S3 use an asymmetric surface shape. Specifically, a double-conical Zernike surface shape is used in this embodiment to achieve that light from all directions emitted by the LED can be converged into the light band. The description of the double-conical Zernike surface shape is as follows:

[0052]

[0053] in:

[0054] In the formula: x, y are the coordinates of the point; z is the vector height of the corresponding point; Rx, Ry are the basic curvatures of the surface in the x and y directions; kx, ky are the cone coefficients in the x and y directions; αi, βi are the higher-order coefficients.

[0055] The first lens 2 has a negative focal length f1y in the Y direction and a positive focal length f1x in the X direction; the second lens 3 has a positive focal length f2y in the Y direction and a negative focal length f2x in the X direction. |f1y / f2y| is 0.5-5, and |f1x / f2x| is 0.6-1.6. In this embodiment, |f1y / f2y| is about 3.6, and |f1x / f2x| is about 0.78.

[0056] The surface parameters of the first lens 2 and the second lens 3 are as follows:

[0057] Face type thickness Refractive Index Abbe number Rx R kx ky led 8.80 S1 standard 30.00 1.49 57.44 infinite infinite S2 Double cone Zernike 3.00 - - -34.68 44.54 -5.30 -15.39 S3 Double cone Zernike 20.00 1.49 57.44 -46.73 12.46 0.62 -1.19 S4 standard - - - infinite infinite

[0058] The surface expansion parameters of the first lens 2 and the second lens 3 are as follows:

[0059] α4 α6 α8 β4 β6 β8 S2 -1.90E-05 1.42E-08 -8.22E-12 1.76E-05 -1.59E--07 1.44E-10 S3 -8.21E-06 6.52E-09 -3.16E-12 -4.31E-05 6.67E--08 -4.53E-11

[0060] The asymmetric lens design is adopted to realize the projection of white light bands with ultra-large field of view, with sharp boundaries and extremely high aspect ratio, and realize the continuous light band projection of non-continuous LED arrays. The position accuracy requirements of LEDs are low, which can greatly reduce the difficulty of processing and assembly. The module composition is simple, only including 3 lenses and a group of LEDs, which is low in cost and greatly reduces the cost. The space utilization rate is high, and the processing and assembly tolerance is large. The system has high light efficiency and low power consumption of the whole lamp.

[0061] In another embodiment, Figure 7 and Figure 8 As shown, a diffuser plate 4 is arranged in parallel behind the surface S4, and a cylindrical lens facing the surface S4 is arranged on the diffuser plate 4. The cylindrical lenses are symmetrically distributed in the X direction, and the curvature gradually becomes gentle from the center to the edge. The pattern structure of the diffuser plate 4 faces the surface S4, which is conducive to the dispersion of the light beam under the action of the cylindrical lens, and reduces the total reflection of the light beam in the diffuser plate 4, thereby reducing the influence of stray light.

[0062] like Figure 6 The projection effect achieved by the first lens 2 and the second lens 3 on a 5m screen is more than ±5m in length. Due to the light-emitting characteristics of LEDs and the long oblique projection distance, the energy distribution satisfies the cubic power of cosine, which will produce great attenuation at large angles. By adding a diffusion plate 4, the edge illumination can be greatly improved. Its role is as follows Fig. 9 As shown in FIG. 4 , the small-angle light beam in the X direction can be diffused, so that the central light beam with stronger energy is dispersed to both sides of the light band. The edge light beam has a lower diffusion degree due to the gentler curvature of the cylindrical lens, and most of the light still propagates in one direction, realizing the diffusion of the light band energy from the center to both sides. The energy distribution of the light band after passing through the diffuser plate 4 is shown in FIG. Fig.10 As shown, the light band width above 100 lx at the edge is expanded to more than ±6.5 m. If the edge illumination needs to be improved, it is only necessary to make some adjustments to the diffusion plate 4.

[0063] In another embodiment, Fig.11 and 12 As shown, a structure 7 for shielding light is provided behind the edge of the surface S4. Since the light beam imaged in the X direction has a very narrow structure and the light beams at various angles are separated to a large extent, the light beams at a certain angle can be easily shielded by the structure 7 without affecting the inner light beams, thereby easily adjusting the length of the light band.

[0064] In the rectangular area of ​​16mm×2.5mm, the position and color of the LED in the x direction can be arbitrarily selected, such as Fig.13 As shown, two colors, white light LED 11 and yellow light LED 12, are used for alternate distribution. When the white light LED 11 is turned on, a white light band is presented, and when the yellow light LED 12 is turned on, a yellow light band is realized.

[0065] like Fig.14 As shown, the light source may also use a combination of a red LED 13, a green LED 14, and a blue LED 15. By controlling the brightness ratio of the three colors, full-color light band projection with variable colors may be achieved.

[0066] like Fig.15 As shown, the self-closed-loop control of the light strip projector can realize a variety of scenarios. For example, the perception module recognizes that a person or object has intruded into the warning area, and after being processed by the algorithm processing module, the light strip projector is controlled to output a yellow warning light strip; or in the music rhythm mode, the light strip projector is controlled to project a colorful rhythmic light strip in accordance with the dance of the person and the rhythm of the music.

[0067] In summary, the light strip projection lamp of the present invention in cooperation with the self-closed loop vehicle lamp can realize light strip projection with an ultra-large field of view, has sharp boundaries and an extremely high aspect ratio, and has a simple system and low cost.

[0068] The above description is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A light strip projection lamp coordinated with a self-closed loop vehicle lamp, characterized in that: include: A light source (1), wherein the light source (1) emits an X-direction light beam (5) and a Y-direction light beam (6); A lens group, wherein the lens group is provided with a first lens (2) and a second lens (3) in sequence from the object plane to the image plane; The Y-direction light beam (6) is collimated and converged in the height direction through the first lens (2) and the second lens (3), and the X-direction light beam (5) is diffused and superimposed in the length direction through the first lens (2) and the second lens (3); The first lens (2) comprises a surface S1 and a surface S2, and the second lens (3) comprises a surface S3 and a surface S4. The surface S2 and the surface S3 are arranged with a relative spacing and are asymmetric.

2. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: The first lens (2) has a negative focal length f1y in the Y direction and a positive focal length f1x in the X direction; the second lens (3) has a positive focal length f2y in the Y direction and a negative focal length f2x in the X direction, and |f1y / f2y| is 0.5-5, and |f1x / f2x| is 0.6-1.

6.

3. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 2, characterized in that: The surface S2 bulges from the left and right sides toward the center in the X direction, and first bulges and then sinks from the left and right sides toward the center in the Y direction.

4. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 3, characterized in that: The surface S3 is concave from the left and right sides toward the center in the X direction, and is convex from the upper and lower sides toward the center in the Y direction.

5. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to any one of claims 1 to 4, characterized in that: The surface S1 and the surface S4 are non-concave surfaces.

6. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 5, characterized in that: The surface S1 and the surface S4 are planes.

7. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 6, characterized in that: The X-direction light beam (5) with an incident angle of less than 40° deviates from the original direction after passing through the first lens (2) and the second lens (3), and the deviation angle is less than ±2°. The X-direction light beam (5) with an incident angle of more than 40° deviates from the original direction after passing through the first lens (2) and the second lens (3), and the deviation angle is less than ±5°.

8. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: A diffusion plate (4) is arranged in parallel behind the surface S4, and a cylindrical lens (401) is provided on the diffusion plate (4) facing the surface S4.

9. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 8, characterized in that: The cylindrical lenses (401) are symmetrically distributed in the X direction, and the curvature is gradually gentle from the center to the edge.

10. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: A structural member (7) for shielding light is provided behind the edge of the surface S4.

11. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: The light source (1) is a group of LED arrays, and the LED array includes a plurality of LED lamps.

12. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: The LED lights are arranged at intervals along the X direction, and the colors of the LED lights are 1-5.

13. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 12, characterized in that: The light strip projection lamp realizes self-closed-loop control through an algorithm processing module and a perception module, thereby automatically projecting light strips of different colors according to the scene.

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