Digital projection vehicle lamp

Abstract

The utility model relates to the technical field of dynamic lighting, in particular to a digital projection vehicle lamp, which comprises a light source module, a light source module, a light source module, a light source module, a light source module, a light source module and a light source module, and the light source module is internally provided with a laser diode and a wavelength conversion sheet; the wavelength conversion sheet is used for converting laser emitted by the laser diode into white light; the collimation module is connected with the light source module and used for adjusting the light beams emitted by the light source module into parallel light; the light uniformizing module is connected with the collimation module and is used for uniformizing the collimated light beams; the DMD module is connected with the dodging module and is used for generating a set pattern; and the lens module is connected with the DMD module, and the pattern generated by the DMD module is emitted through the lens module so as to generate a set pattern at a specified position. According to the utility model, the laser diode is selected to replace an LED light source, energy loss is reduced, and long-distance dynamic projection illumination is realized.

Description

Technical Field

[0001] This utility model relates to the field of dynamic lighting technology, and in particular to a digital projection vehicle light. Background Technology

[0002] Digital projection headlights, also known as intelligent projection headlights, are a significant new technology in modern automotive lighting systems. They combine advanced optics and electronics to achieve more intelligent and versatile lighting effects than traditional headlights. These headlights not only provide basic illumination but also display information, patterns, or animations through projection technology, enhancing the driving experience and improving safety.

[0003] The working principle of digital projection vehicle lights is to use light sources such as LEDs or OLEDs and project images, text, or signs onto lanes, vehicle bodies, or other locations through a high-precision projection system, such as a small digital micromirror array (DMD). In the prior art, such as the Chinese utility model patent with publication number CN211454199U published on September 8, 2020, a projection optical system, projection module, and vehicle are disclosed. By reducing the divergence angle of the illumination beams of two high-power LEDs, the projection optical system can output higher luminous flux and a wider projection field of view, thereby improving the brightness and illumination range of the projected road surface.

[0004] However, the inventors discovered that existing LED light sources suffer from significant energy loss and still face the problem of difficulty in long-distance projection. Utility Model Content

[0005] In view of at least one of the above technical problems, the present invention provides a digital projection vehicle light that uses an improved light source to achieve long-distance dynamic projection lighting.

[0006] According to a first aspect of the present invention, a digital projection vehicle light is provided, comprising:

[0007] A light source module, which includes a laser diode and a wavelength conversion chip, wherein the wavelength conversion chip is used to convert the laser emitted by the laser diode into white light;

[0008] A collimation module, connected to the light source module, is used to adjust the light beam emitted by the light source module into parallel light;

[0009] A beam homogenization module, connected to the collimation module, is used to homogenize the collimated beam.

[0010] The DMD module, connected to the uniform light module, is used to generate a set pattern;

[0011] A lens module is connected to the DMD module. The pattern generated by the DMD module is emitted through the lens module to generate a set pattern at a specified position.

[0012] In some embodiments of this utility model, the light source module further includes a first aspherical lens protruding toward the laser diode, the first aspherical lens being disposed between the laser diode and the wavelength conversion plate.

[0013] In some embodiments of this utility model, the light source module further includes a diffuser, which is disposed between the first aspherical lens and the wavelength conversion plate.

[0014] In some embodiments of this utility model, the light source module further includes a first base for fixing the laser diode and the first aspherical lens, and a second base for fixing the diffuser and the wavelength conversion plate. The first base has a connecting tube protruding toward the second base, and the connecting tube extends into the second base.

[0015] In some embodiments of this utility model, the first base is made of copper.

[0016] In some embodiments of this utility model, a plurality of heat dissipation fins are arranged at intervals along the length of the second base.

[0017] In some embodiments of this utility model, the collimation module includes a second aspherical lens and a third aspherical lens that protrude toward the light source module and are spaced apart.

[0018] In some embodiments of this utility model, the light homogenizing module includes a compound eye lens and a fourth aspherical lens. The array size of the compound eye lens is consistent with the resolution of the DMD chip in the DMD module. The fourth aspherical lens is used to collect light and incident it into the DMD module.

[0019] In some embodiments of this utility model, a heat dissipation module connected to the light source module is also included, the heat dissipation module including heat sink and fan.

[0020] In some embodiments of this utility model, a circuit module is also included, which is electrically connected to the fan, the DMD module and the laser diode.

[0021] The beneficial effects of this utility model are as follows: This utility model utilizes diodes as light sources through the synergistic effect of multiple modules, generates white light through wavelength conversion, and then generates patterns through collimation, uniform light, and DMD modules, and finally projects the light beam through the lens module; compared with the prior art, the use of laser diodes instead of LED light sources reduces energy loss and realizes long-distance dynamic projection lighting. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the digital projection vehicle light in this embodiment of the present invention;

[0024] Figure 2 As an embodiment of this utility model Figure 1 Sectional view along the middle AA direction;

[0025] Figure 3 This is a cross-sectional view of the light source module in an embodiment of this utility model;

[0026] Figure 4 This is a cross-sectional view of the collimation module in an embodiment of this utility model;

[0027] Figure 5 This is a cross-sectional view of the light-diffusing module in an embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the optical path in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached diagram: 1. Light source module; 11. Laser diode; 12. Wavelength conversion plate; 13. First aspherical lens; 14. Diffuser; 15. First base; 15a. Connecting tube; 16. Second base; 16a. Heat dissipation fin; 2. Collimation module; 21. Second aspherical lens; 22. Third aspherical lens; 3. Beam homogenization module; 31. Compound eye lens; 32. Fourth aspherical lens; 4. DMD module; 5. Lens module; 6. Heat dissipation module; 61. Heat sink; 62. Fan. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figures 1 to 6 The digital projection vehicle headlight shown includes: a light source module 1, which contains a laser diode 11 and a wavelength conversion chip 12. The wavelength conversion chip 12 is used to convert the laser emitted by the laser diode 11 into white light. Figure 3 As shown, laser diode 11 emits a laser beam, but laser light is usually monochromatic and of a relatively single color. To produce a suitable lighting effect for the vehicle headlights, the laser light needs to be converted into white light. Therefore, the wavelength conversion chip 12 converts the laser beam emitted by laser diode 11 into white light. There can be 1-28 laser diodes 11, emitting wavelengths between 430nm and 470nm. The wavelength conversion chip 12 converts laser light with wavelengths between 430nm and 470nm into white light with wavelengths between 400nm and 700nm. Collimation module 2, connected to light source module 1, is used to adjust the beam emitted by light source module 1 into parallel light. Figure 4 As shown, the beam emitted by laser diode 11 is usually non-parallel and needs to be adjusted by collimation module 2 to make the emitted beam parallel. The homogenizing module 3, connected to collimation module 2, is used to homogenize the collimated beam. Figure 5As shown, the collimated light beam may still have some non-uniformity, therefore a beam homogenizing module 3 is needed to ensure a more uniform light intensity distribution in space. The DMD module 4, connected to the beam homogenizing module 3, is used to generate a predetermined pattern. The DMD module 4 is a digital optical processor containing thousands of tiny mirrors, each of which can be independently tilted to reflect light. By adjusting the angles of these micromirrors, patterns or projected images are generated. The lens module 5, connected to the DMD module 4, projects the pattern generated by the DMD module 4 through the lens module 5, creating a predetermined pattern at a specified location. The lens module 5, through a suitable lens design, projects the pattern generated by the DMD module 4 onto the desired location, forming the illumination pattern or signal of the vehicle lights.

[0034] In the above embodiment, through the synergistic effect of multiple modules, a diode is used as a light source to generate white light through wavelength conversion. The light is then controlled by the collimation module 2, the uniform light module 3, and the DMD module 4 to generate a pattern, and finally the beam is projected through the lens module 5. Compared with the prior art, the use of a laser diode 11 instead of an LED light source reduces energy loss and realizes long-distance dynamic projection lighting.

[0035] In the embodiments of this utility model, in order to optimize the optical performance of the light source module 1, please continue to refer to... Figure 3 and Figure 6 The light source module 1 also includes a first aspherical lens 13 protruding towards the laser diode 11, positioned between the laser diode 11 and the wavelength conversion plate 12. The first aspherical lens 13, protruding towards the laser diode 11, optimizes the beam from the laser diode 11. The aperture of the first aspherical lens 13 is between 5mm and 40mm, and the focal length is between 4mm and 100mm. It should be noted that, compared to traditional spherical lenses, aspherical lenses provide more precise optical control and reduce beam aberrations. The placement of the first aspherical lens 13 between the laser diode 11 and the wavelength conversion plate 12 ensures that laser illumination is more concentrated on the wavelength conversion plate 12, improving the overall luminous efficacy and conversion efficiency of the light source.

[0036] In embodiments of this utility model, to ensure the stability of the output light, such as Figure 3 and Figure 6As shown, the light source module 1 also includes a diffuser 14, which is disposed between the first aspherical lens 13 and the wavelength conversion plate 12. The diffuser 14 can uniformly scatter light, so that the light beam forms a uniform light source before contacting the wavelength conversion plate 12, thereby optimizing the effect of the wavelength conversion plate 12. The diffusion angle of the diffuser 14 is between 0.5° and 10°, and the thickness is between 0.3mm and 2.0mm. The first aspherical lens 13 has already made certain adjustments to the light beam, making the beam more focused or parallel, but this does not necessarily guarantee the uniformity of the light beam throughout the entire beam transmission path. The diffuser 14 can further homogenize the light beam and eliminate the beam non-uniformity that may be caused by the lens. If the light is non-uniform, the effect of the wavelength conversion plate 12 may be affected, resulting in non-uniform white light output or low conversion efficiency.

[0037] Based on the above embodiments, the fixing form of the light source module 1 is as follows: Figure 3 As shown, the light source module 1 also includes a first base 15 for fixing the laser diode 11 and the first aspherical lens 13, and a second base 16 for fixing the diffuser 14 and the wavelength conversion plate 12. The first base 15 has a connecting tube 15a protruding towards the second base 16, and the connecting tube 15a extends into the second base 16. The first base 15 ensures accurate fixing of the laser diode 11 and the first aspherical lens 13, ensuring the beam quality of the light source module 1. Similarly, the second base 16 ensures the fixing of the diffuser 14 and the wavelength conversion plate 12. The connecting tube 15a is a connecting component between the first base 15 and the second base 16. The connecting tube 15a not only provides a mechanical connection but also ensures the stability of the light source module 1. The connection form of the connecting tube 15a can be a pin connection, a threaded connection, a press-fit connection, etc.

[0038] In this embodiment of the invention, to improve the thermal conductivity of the product, the first base 15 is made of copper. Copper is an excellent thermally conductive material with high thermal conductivity. The laser diode 11 and other components in the light source module 1 generate a large amount of heat during operation. The use of copper for the first base 15 can effectively dissipate this heat, preventing excessive temperature from damaging the components in the light source module 1 and ensuring the stability of the product during operation.

[0039] Specifically, in this embodiment of the invention, four laser diodes 11 can be configured, with an optical power of 22W and an emission wavelength of 455nm. The aperture of the first aspherical lens 13 is set to 16mm, and the focal length is 28mm. The blue light emitted by the laser diodes 11 is focused onto a diffuser 14 with a thickness of 0.7mm and a diffusion angle of 5°. The blue light is uniformly diffused by the diffuser 14 and then incident onto a wavelength conversion plate 12 with a color temperature of 6500K. The blue light excites the fluorescent material on the wavelength conversion plate 12 to produce yellow light, which mixes with the unabsorbed blue light to form white light. Furthermore, thermally conductive silicone can be uniformly coated on the bottom of the laser diodes 11, and they can be connected to the first base 15 by fastening screws.

[0040] In embodiments of this utility model, to ensure the heat dissipation effect of the product, such as Figure 3 As shown, a number of heat dissipation fins 16a are arranged at intervals along the length of the second base 16. The arrangement of heat dissipation fins 16a can significantly increase the surface area for heat exchange, allowing heat to be conducted from the base to the air more quickly, thereby reducing the temperature of the light source module 1.

[0041] In embodiments of this invention, to optimize the propagation direction and focusing accuracy of light, such as... Figure 4 and Figure 6 As shown, the collimation module 2 includes a second aspherical lens 21 and a third aspherical lens 22 that protrude away from the light source module 1 and are spaced apart. The second aspherical lens 21 precisely adjusts the curvature of the diverging beam from the light source module 1, and the third aspherical lens 22 adjusts the beam after passing through the second aspherical lens 21 to ensure more precise parallelism. Here, the second aspherical lens 21 can be set to have an aperture of 6.5 mm and a focal length of 4 mm, and is close to the wavelength conversion plate 12 to collect the white light emitted from the wavelength conversion plate 12. The third aspherical lens 22 is set to have an aperture of 15 mm and a focal length of 10.5 mm, collimating the received white light to a spot diameter of about 12 mm, which is then incident on the compound eye lens 31. The spaced arrangement avoids excessive bending or dispersion of the beam and provides space for optical adjustment between the collimation modules 2.

[0042] In embodiments of this invention, the light beam is homogenized, such as... Figure 5 and Figure 6As shown, the homogenizing module 3 includes a compound eye lens 31 and a fourth aspherical lens 32. The array size of the compound eye lens 31 is consistent with the resolution of the DMD chip in the DMD module 4. The fourth aspherical lens 32 is used to collect light and direct it into the DMD module 4. The compound eye lens 31 is a special optical element composed of multiple small lenses, which homogenizes the light beam. The array size of the compound eye lens 31 is consistent with the resolution of the DMD chip in the DMD module 4, ensuring that the light beam output by the homogenizing module 3 can accurately illuminate each pixel of the DMD chip, avoiding beam distortion or image failure caused by size mismatch. The function of the fourth aspherical lens 32 is to collect the homogenized light beam from the compound eye lens 31 and guide it to the DMD module 4. The cooperation between the compound eye lens 31 and the fourth aspherical lens 32 ensures that the optical path from the light source to the DMD module 4 is precisely designed, improving the efficiency and accuracy of the entire optical system.

[0043] In operation, the white laser source is set to a luminous flux of 200 lumens. After collimation by collimation module 2, the beam diameter is approximately 12mm, with an angle within ±5.5°. The beam is then homogenized by homogenization module 3. The array size of the compound eye lens 31 in homogenization module 3 is close to 16:9, matching the 16:9 aspect ratio of the DMD chip in DMD module 4. The beam emitted from homogenization module 3 has a margin that allows for incident light onto the DMD chip, ensuring that the edges of the projected pattern are uniform. In this embodiment, a TI 4710 DMD chip is selected, with an array diagonal of 0.47 inches. The light finally exits through lens module 5. In this embodiment, a 35mm focal length, F1.4, C-mount lens module 5 can be used to ensure clear imaging within a range of 0.4m-∞. The lens focal length is determined based on the DMD chip size and the image size at the specified distance: Lens focal length = (specified distance x chip size) / image size.

[0044] In embodiments of this utility model, in order to further improve the heat dissipation effect of the product, such as... Figure 1 As shown, the system also includes a heat dissipation module 6 connected to the light source module 1. The heat dissipation module 6 includes a heat sink 61 and a fan 62. The heat sink 61 adopts a plate-like or fin-like structure, increasing its surface area and enhancing its heat exchange capacity to help dissipate the heat generated by the light source module 1. The heat sink 61 can be made of materials with high thermal conductivity, such as aluminum alloy or copper. The fan 62 works in conjunction with the heat sink 61. By forcing airflow, the fan 62 increases the contact between the air and the heat sink 61, thereby accelerating heat removal. The size of the heat sink 61 and the fan can be changed according to the number of laser diodes 11 in the light source module 1. Through the synergistic effect of the heat sink 61 and the fan 62, the heat generated by the light source module 1 during operation is effectively dissipated into the environment, ensuring product stability and extending its service life.

[0045] In this novel embodiment, a circuit module (not shown) is included, which is electrically connected to the fan 62, the DMD module 4, and the laser diode 11. The circuit module can receive data, process signals from the DMD module 4, the fan 62, and the laser diode 11, and adjust the operating state of each component based on these signals. It can adjust the speed of the fan 62, control the laser intensity, etc., to ensure the stability of the product's operation.

[0046] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A digital projection vehicle light, characterized in that, include: A light source module, which includes a laser diode and a wavelength conversion chip, wherein the wavelength conversion chip is used to convert the laser emitted by the laser diode into white light; A collimation module, connected to the light source module, is used to adjust the light beam emitted by the light source module into parallel light; A beam homogenization module, connected to the collimation module, is used to homogenize the collimated beam. The DMD module, connected to the uniform light module, is used to generate a set pattern; A lens module is connected to the DMD module. The pattern generated by the DMD module is emitted through the lens module to generate a set pattern at a specified position.

2. The digital projection vehicle light according to claim 1, characterized in that, The light source module also has a first aspherical lens that protrudes toward the laser diode, and the first aspherical lens is disposed between the laser diode and the wavelength conversion plate.

3. The digital projection vehicle light according to claim 2, characterized in that, The light source module also includes a diffuser, which is disposed between the first aspherical lens and the wavelength conversion plate.

4. The digital projection vehicle light according to claim 3, characterized in that, The light source module further includes a first base for fixing the laser diode and the first aspherical lens, and a second base for fixing the diffuser and the wavelength conversion plate. The first base has a connecting tube that protrudes toward the second base and extends into the second base.

5. The digital projection vehicle light according to claim 4, characterized in that, The first base is made of copper.

6. The digital projection vehicle light according to claim 4, characterized in that, The second base has several heat dissipation fins arranged at intervals along its length.

7. The digital projection vehicle light according to claim 1, characterized in that, The collimation module includes a second aspherical lens and a third aspherical lens that protrude away from the light source module and are spaced apart.

8. The digital projection vehicle light according to claim 1, characterized in that, The light homogenizing module includes a compound eye lens and a fourth aspherical lens. The array size of the compound eye lens is consistent with the resolution of the DMD chip in the DMD module. The fourth aspherical lens is used to collect light and incident it into the DMD module.

9. The digital projection vehicle light according to claim 1, characterized in that, It also includes a heat dissipation module connected to the light source module, the heat dissipation module including heat sink and fan.

10. The digital projection vehicle light according to claim 9, characterized in that, It also includes a circuit module, which is electrically connected to the fan, the DMD module and the laser diode.

Images