Light strip projection lamp coordinated with self-closing loop headlights

Abstract

The present invention discloses a light strip projection lamp that cooperates with a self-closed-loop vehicle lamp. The light strip projection lamp comprises: a light source that emits an X-direction light beam and a Y-direction light beam; a lens assembly that includes 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, and the second lens includes a surface S3 and a surface S4, wherein the surfaces S2 and S3 are spaced relative to each other and are asymmetric. The light strip projection lamp of the present invention, which cooperates with the self-closed-loop vehicle lamp, can achieve light strip projection with an extremely large field of view, sharp edges, and an extremely high aspect ratio, while maintaining a simple system and low cost.

Description

Technical Field

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

[0002] A circle of light is projected around the vehicle body to indicate 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 angle may reach more than ±50°. In existing technical solutions, linear lasers can well meet the graphic requirements, but their color cannot achieve white and cannot meet the safety requirements of human eyes. Other solutions, such as film projection, have a very low overall optical efficiency due to the large aspect ratio of the graphics. The film pattern is a long and thin straight line, and the field of view angle is difficult to reach more than ±50°. The overall light efficiency is low and cannot meet the requirements of large-angle projection. At the same time, the system is more complex.

[0003] For example, the ADB headlight solution described in CN118757708A utilizes an array of LEDs combined with silicone light guides to project the shape of the light source. However, to achieve a slender straight line projection, a large number of LEDs is required, which inevitably leads to problems of bulky size and complex structure, and still has 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 strip projection lamp coordinated with a self-closed loop vehicle lamp, comprising: a light source, the light source emitting an X-direction light beam and a Y-direction light beam; a lens group, the lens group having a first lens and a second lens sequentially arranged along 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, and the second lens includes a surface S3 and a surface S4, and the surfaces S2 and S3 are arranged relatively spaced apart and have an asymmetric surface shape.

[0006] Furthermore, in order to achieve a clear boundary and converge light sources from 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, the |f1y / f2y| is 0.5-5, and the |f1x / f2x| is 0.6-1.6.

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

[0008] Furthermore, in order to control the emission direction of light, the surface S3 is concave from the left and right sides toward the center in the X direction, and is convex from the top and bottom 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-direction light 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-direction light beam with an incident angle of more than 40° has its exit angle increase or decrease 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 provided 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 strip, a structure for shielding light is provided behind the edge of the surface S4.

[0015] Furthermore, in order to improve the brightness of the light strip, the light source is a group of LED arrays, and the LED array includes multiple 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 the algorithm processing module and the 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 strip projection lamp coordinated with the self-closed loop vehicle lamp of the present invention, the surfaces S2 and S3 adopt an asymmetric lens design to realize the light strip continuous projection with an ultra-high aspect ratio of the discontinuous LED array.

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

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

[0022] The light strip projection lamp of the present invention cooperates with the self-closed loop vehicle lamp, adopts a group of LED arrays composed of multiple LEDs as the 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 the perception module and the algorithm processing module, the self-closed-loop control of the light strip projection lamp can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 A schematic structural diagram of a light strip projection lamp in cooperation with a self-closed-loop vehicle lamp according to 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 Schematic diagram of the X-axis beam passing through the lens group;

[0029] Figure 5 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 Schematic diagram of the three-dimensional structure of the diffuser plate;

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

[0033] Figure 9 Schematic diagram of the effect of the diffuser on the X-beam;

[0034] Figure 10 This is the energy distribution diagram of the light band passing through the lens group and the diffuser;

[0035] Figure 11 Schematic diagram of the effect of structural components on the X-axis beam;

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

[0037] Figure 13 The arrangement of the LED array;

[0038] Figure 14 Another arrangement of LED arrays;

[0039] Figure 15 This 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. Diffuser 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, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such 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 expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] like Figure 1 As shown, a light strip projection lamp that works with a self-closed-loop vehicle lamp includes a light source 1 and a lens assembly. Light source 1 is an LED array comprising multiple LEDs. In this embodiment, five LEDs are arranged at regular intervals as light source 1. Light source 1 emits an X-beam 5 and a Y-beam 6.

[0045] like Figure 2 and Figure 3 As shown, the lens assembly includes a first lens 2 and a second lens 3, arranged sequentially from the object plane to the image plane. The first lens 2 comprises surfaces S1 and S2. The second lens 3 comprises surfaces S3 and S4. Surfaces S2 and S3 are spaced relative to each other and both have a biconical Zernike surface configuration. Surface S2 convexly extends from the left and right sides toward the center in the X-direction and first convexly and then concavely extends from the left and right sides toward the center in the Y-direction. Surface S3 concavely extends from the left and right sides toward the center in the X-direction and convexly extends from the top and bottom toward the center in the Y-direction. The asymmetric biconical Zernike surface configuration used in the embodiments of the present invention provides more freedom for optimizing overall aberrations. The X-direction is an afocal system, which essentially does not change the propagation direction of the light beam. It utilizes the divergent light from the LEDs at various angles to achieve maximum broadening and achieve the desired light strip length. The spacing of the LEDs in this direction has a wide tolerance. The Y-direction is a collimating system, which ensures that the LED beams are highly collimated in this direction, resulting in sharp edges and a very narrow width. This system can achieve a light strip with an aspect ratio greater than 18:1 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. 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, as shown in FIG. Figure 4 As shown, the small-angle X-direction light beam 5a (incident angle <40°) deviates from the original direction by a small angle, and the deviation angle does not exceed ±2°. The large-angle X-direction light beam 5b (incident angle >40°) deviates from the original direction by a large angle, and the deviation angle is less than ±5°. The light beams at different angles are projected and superimposed in the X-direction, thereby meeting the length requirements 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 angle of increase or decrease 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. In the Y direction, the light beam 6 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. To achieve a clear boundary, surfaces S2 and S3 use asymmetric surface shapes. Specifically, this embodiment uses a biconical Zernike surface shape to ensure that light emitted from the LED in all directions can be converged into the light band. The biconical Zernike surface shape is described as follows:

[0052]

[0053] in:

[0054] Where: x and y are the coordinates of the point; z is the sagittal height of the corresponding point; Rx and Ry are the basic curvatures of the surface in the x and y directions; kx and ky are the conic coefficients in the x and y directions; αi and βi are high-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 approximately 3.6, and |f1x / f2x| is approximately 0.78.

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

[0057] Face shape thickness Refractive index Abbe number Rx Ry 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 achieves white light band projection with an ultra-wide field of view. Its sharp edges and high aspect ratio enable continuous light band projection from discontinuous LED arrays. This design requires minimal LED positioning accuracy, significantly simplifying processing and assembly. The module's simple construction, consisting of only three lenses and a single set of LEDs, is cost-effective and significantly reduces costs. It also offers high space utilization and wide processing and assembly tolerances. The system boasts high luminous efficiency and low power consumption.

[0061] In another embodiment, Figure 7 and Figure 8 As shown, a diffuser plate 4 is positioned parallel to and behind surface S4. It has cylindrical lenses oriented toward surface S4. The cylindrical lenses are symmetrically distributed in the X-direction, with a gradually flatter curvature from the center to the edge. The patterned structure of diffuser plate 4 faces surface S4, facilitating the dispersion of the light beams by the cylindrical lenses. This reduces total internal reflection of the light beams within diffuser plate 4, thereby reducing the effects 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 long. Due to the luminous 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 diffuser 4, the edge illumination can be greatly improved. Its role is as follows Figure 9 As shown in FIG, 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 degree of diffusion due to the flatter 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 as follows: Figure 10 As shown in FIG, the width of the light band 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 certain adjustments to the diffuser plate 4.

[0063] In another embodiment, Figure 11 and 12 As shown, a light-blocking structure 7 is provided behind the edge of surface S4. Because the beam imaged in the X direction is very narrow and the beams at different angles are widely separated, the structure 7 can easily block the beams at certain angles without affecting the inner beams, making it easy to adjust the length of the light strip.

[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 Figure 13 As shown, two colors of white light LED 11 and yellow light LED 12 are used for staggered 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 Figure 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 can be achieved.

[0066] like Figure 15 As shown in the figure, 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 broken into the warning area, and after processing 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 colorful rhythmic light strips 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 cooperates with the self-closed loop vehicle lamp to achieve light strip projection with an ultra-large field of view, sharp boundaries and an extremely high aspect ratio, with a simple system and low cost.

[0068] The above description is intended to serve as a guide for the preferred embodiments of the present invention. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification and 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), the light source (1) emitting 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 by passing 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 by passing 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, wherein the surface S2 and the surface S3 are arranged relative to each other and are asymmetrical. 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. 0.5-5, 0.6-1.6; The surface S2 is convex from the left and right sides toward the center in the X direction, and is first convex and then concave from the left and right sides toward the center in the Y direction; The surface S3 is concave from the left and right sides toward the center in the X direction, and is convex from the top and bottom sides toward the center in the Y direction.

2. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 1, characterized in that: The surface S1 and the surface S4 are non-concave surfaces.

3. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 2, characterized in that: The surface S1 and the surface S4 are planes.

4. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 3, 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°.

5. 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 parallel to the rear of the surface S4, and a cylindrical lens (401) is provided on the diffusion plate (4) facing the surface S4.

6. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 5, characterized in that: The cylindrical lenses (401) are symmetrically distributed in the X direction, and the curvature is gradually flattened from the center to the edge.

7. 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.

8. 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.

9. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 8, characterized in that: The LED lights are arranged at intervals along the X direction, and the colors of the LED lights are 1-5.

10. The light strip projection lamp coordinated with the self-closed loop vehicle lamp according to claim 9, characterized in that: The light strip projection lamp realizes self-closed-loop control through the algorithm processing module and the perception module, thereby automatically projecting light strips of different colors according to the scene.

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