Car lamp

Abstract

The utility model discloses a car lamp which comprises a heat dissipation substrate, a low-beam light source arranged above the heat dissipation substrate and used for emitting illumination light, a light cutting piece arranged on a light path of the low-beam light source, a projection light source used for achieving the projection function and a light emitting lens. The light-emitting lens comprises a first lens part used for emitting light of a low-beam light source and a second lens part used for emitting light of a projection light source. And the second lens part is positioned above the first lens part. The automobile lamp has the lighting function and the projection function at the same time, and is small in occupied space, more attractive and good in heat dissipation performance. When illumination is needed, the low-beam light source above the heat dissipation substrate is turned on, light emitted by the low-beam light source is partially shielded after passing through the light cutting piece, and the light passes through the first lens part located below and emits a low-beam light type; when projection is needed, the projection light source is turned on, and light emitted by the projection light source is imaged through the imaging lens group to obtain a preset pattern.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lighting, and more particularly to an automobile lamp. Background Art

[0002] With the continuous improvement of economic levels, consumers have more personalized demands for headlights. Headlight projection not only provides more ideal lighting conditions in dark environments, but also assists driving, providing visual support for drivers and pedestrians, allowing flexible response to various road conditions and effectively improving vehicle safety at night. For example, it can project boundary lines, zebra crossings, and stop signs on the road surface. Currently, a single headlight on the market can only perform one of the following functions: lighting or projection. To achieve both functions simultaneously, two headlights need to be combined to form a headlight system, which will make the overall headlight system too large, which is not conducive to heat dissipation and aesthetics. Utility Model Content

[0003] The utility model aims to overcome at least one defect of the above-mentioned prior art and provide a headlight for solving the problem that the overall volume of the automobile headlight that realizes both lighting and projection functions in the prior art is too large, which is not conducive to heat dissipation and aesthetics.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] A vehicle lamp comprises: a heat dissipation substrate, a low-beam light source arranged above the heat dissipation substrate and used for emitting illumination light, a light cutter arranged in the optical path of the low-beam light source and capable of forming the illumination light into a low-beam light type, a projection light source for realizing a projection function, and a light output lens; the light output lens comprises a first lens portion for emitting light from the low-beam light source, and a second lens portion for emitting light from the projection light source; the second lens portion is an imaging lens group, and the second lens portion is located above the first lens portion; the projection light source is a micro light emitting diode provided with a phosphor layer; or the projection light source comprises a projection light source and a digital micromirror device arranged in the optical path of the projection light source.

[0006] In one embodiment, the projection light source is a micro light emitting diode provided with a phosphor layer. The projection light source is arranged above the low beam light source and corresponds to the second lens portion.

[0007] In one embodiment, the projection light source includes a projection light source arranged under the heat dissipation substrate, a digital micromirror device arranged corresponding to the second lens portion, and a reflective component for reflecting and converging the light emitted by the projection light source onto the digital micromirror device.

[0008] In one embodiment, the reflective assembly includes a first reflective cup disposed below the heat dissipation substrate and used to reflect light from the projection illuminant, and a second reflective cup used to receive collimated light reflected by the first reflective cup and converge the light onto the digital micromirror device. The first reflective cup is a parabolic reflective cup, and the projection illuminant is located at the focal position of the parabolic reflective cup.

[0009] In one embodiment, the projection light source includes a projection light-emitting body arranged below the heat dissipation substrate, a light-collecting lens arranged on the light path of the projection light-emitting body, a digital micromirror device arranged corresponding to the second lens portion, and a first reflection component for reflecting and converging the light emitted by the projection light-emitting body onto the digital micromirror device.

[0010] In one embodiment, the first reflective component includes a first reflector for reflecting the light received by the light-collecting lens, and a third reflective cup for receiving the light reflected by the first reflector and converging the light onto the digital micromirror device.

[0011] In one embodiment, the projection light source includes a projection light source arranged below the heat dissipation substrate, a TIR lens arranged on the optical path of the projection light source, a digital micromirror device arranged corresponding to the second lens portion, and a second reflection component for reflecting and converging the light collected by the TIR lens onto the digital micromirror device.

[0012] In one embodiment, the second reflective component includes a second reflector for reflecting the light collimated by the TIR lens, and a fourth reflective cup for receiving the light reflected by the second reflector and converging the light onto the digital micromirror device.

[0013] In one embodiment, the low beam light source includes a low beam illuminator disposed above a substrate, and a low beam reflector cup covering the low beam illuminator, and the low beam illuminator is disposed at one focal position of the low beam reflector cup.

[0014] In one embodiment, the first lens portion and the second lens portion are integrally formed; and / or the light cutting plate and the heat dissipation substrate are integrally formed; and / or the light incident surface of the light output lens is circular.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least:

[0016] The headlights of this technical solution have both lighting and projection functions, and they occupy a small space, are more aesthetically pleasing, and have excellent heat dissipation. Specifically, when lighting is required, the low-beam light source above the heat dissipation substrate is turned on. The light emitted by the low-beam light source is partially blocked by the light cutter and then emitted through the first lens portion located below to produce a low-beam light pattern. When projection is required, the projection light source is turned on, and the light emitted by the projection light source is imaged by the imaging lens group to form a preset pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the vehicle lamp according to Example 1 of the present utility model.

[0018] Figure 2 This is a structural schematic diagram of the heat dissipation substrate described in Example 1 of the present utility model.

[0019] Figure 3 This is a structural diagram of the light-emitting lens described in Example 1 of the present utility model.

[0020] Figure 4 This is a structural diagram of the vehicle lamp described in Example 2 of the present utility model.

[0021] Figure 5 This is a structural diagram of the vehicle lamp described in Example 3 of the present utility model.

[0022] Figure 6 This is a schematic structural diagram of the vehicle lamp according to Example 4 of the present utility model.

[0023] Figure numerals: 10, heat dissipation substrate; 20, low-beam light source; 21, low-beam illuminator; 22, low-beam reflector cup; 30, light-cutting piece; 40, projection light source; 41, projection illuminator; 42, digital micromirror device; 43, reflective assembly; 431, first reflective cup; 432, second reflective cup; 44, light-collecting lens; 45, first reflective assembly; 451, first reflector; 452, third reflective cup; 46, TIR lens; 47, second reflective assembly; 471, second reflector; 472, fourth reflective cup; 50, light-emitting lens; 51, first lens portion; 52, second lens portion; 521, biconvex lens; 522, biconcave lens; 523, plano-convex lens. DETAILED DESCRIPTION

[0024] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0025] Example 1

[0026] like Figure 1 The headlight shown includes: a heat dissipation substrate 10, a low beam light source 20 arranged above the heat dissipation substrate 10 and used to emit illumination light, a light cutter 30 arranged on the optical path of the low beam light source 20 and capable of forming the illumination light into a low beam light type, a projection light source 40 for realizing a projection function, and a light output lens 50; the light output lens 50 includes a first lens portion 51 for emitting light from the low beam light source 20, and a second lens portion 52 for emitting light from the projection light source 40; the second lens portion 52 is an imaging lens group, and the second lens portion 52 is located above the first lens portion 51; the projection light source 40 is a micro light emitting diode (Micro-LED) provided with a phosphor layer.

[0027] The headlight of this embodiment has both lighting and projection functions, and it occupies a small space, is more aesthetically pleasing, and has excellent heat dissipation. Specifically, when lighting is required, the low-beam light source 20 above the heat dissipation substrate 10 is turned on. The light emitted by the low-beam light source 20 is partially blocked by the light cutter 30 and then emitted through the first lens portion 51 located below to produce a low-beam light pattern. When projection is required, the projection light source 40 is turned on, and the light emitted by the projection light source 40 is imaged by the imaging lens group to form a preset pattern.

[0028] In this embodiment, the projection light source 40 is a micro-LED equipped with a phosphor layer. The projection light source 40 is positioned above the low-beam light source 20 and corresponds to the second lens portion 52. The micro-LED is composed of multiple tiny LED units, each of which can emit light independently. Therefore, by controlling the lighting or shutting off of different LED units, various patterns can be formed. Combined with the second lens portion 52 for imaging, a desired projection effect can be achieved.

[0029] The low-beam light source 20 in this embodiment includes a low-beam emitter 21 positioned above a base plate, and a low-beam reflector 22 covering the low-beam emitter 21. The low-beam emitter 21 is positioned at one of the focal points of the low-beam reflector 22. When illumination is required, the low-beam emitter 21 is illuminated. The light emitted by the low-beam emitter 21 is collected by the low-beam reflector 22 and then projected onto the first lens portion 51 located below. Due to the action of the light cutter 30, a low-beam light pattern with a clear cutoff line is achieved. In this embodiment, the low-beam emitter 21 is a phosphor-coated LED.

[0030] For ease of assembly, in this embodiment, the first lens portion 51 and the second lens portion 52 are integrally formed; the light cutting piece 30 is integrally formed with the heat dissipation substrate 10, and the light cutting piece 30 is provided at the edge of the heat dissipation substrate 10. Figure 2Since the second lens portion 52 is an imaging lens group including at least two lenses, in other embodiments, the first lens portion 51 and one lens of the second lens portion 52 may be integrally formed; in other embodiments, the second lens portion 52 may be assembled independently.

[0031] In this embodiment, the second lens portion 52 , i.e., the imaging lens group, includes a biconvex lens 521 , a biconcave lens 522 , and a plano-convex lens 523 arranged in sequence along the optical path, wherein the plane side of the plano-convex lens 523 is close to the biconcave lens 522 .

[0032] like Figure 3 As shown, the light incident surface of the light output lens 50 in this embodiment is circular. The light incident surface of the light output lens 50 is circular, which is more visually beautiful. Although the light output surface is not a standard spherical surface or aspherical surface, the overall outline of the light output lens 50 is circular, which conforms to the public aesthetics and has a more compact overall structure.

[0033] In addition to projecting graphics, the projection light source 40 of this embodiment can also achieve an enhanced lighting effect. When a vehicle requires a better lighting effect, the projection light source 40 can be used to emit illumination light. If a low-beam enhancement effect is required, part of the light from the projection light source 40 is transmitted to the low-beam illumination area; conversely, if a high-beam effect is required, part of the light from the projection light source 40 is transmitted in front of the low-beam illumination area.

[0034] Example 2

[0035] like Figure 4As shown, this embodiment has a similar structure and principle to that of Example 1, differing in that the projection light source 40 in this embodiment includes a projection light source 41 disposed beneath the heat dissipation substrate 10, a digital micromirror device 42 corresponding to the second lens portion 52, and a reflective assembly 43 for reflecting and converging light emitted by the projection light source 41 onto the digital micromirror device 42. A DMD is a type of optical switch that uses a rotating mirror to open and close the optical switch. It is a core component of DLP technology. A DMD is an optical semiconductor module that allows for digital processing and projection of light. Combining a light source and optical components, a DMD can achieve binary patterns with speed, accuracy, and efficiency far exceeding other spatial light modulation methods. Each lens of the DMD can be deflected + / -12° around a hinged tilt axis. The deflection (positive and negative) of the lens is individually controlled by changing the binary state of the underlying CMOS control circuitry and the lens reset signal. This allows the lens to be tilted toward the light source (on) or away from the light source (off) in the DLP projection system, resulting in bright or dark pixels on the projection surface, achieving the desired projection effect. The light source can be a phosphor-coated LED or a laser-excited phosphor sheet to produce a mixed light source. Each DMD contains up to 2 million independently controlled micromirrors, each of which is implemented on a corresponding CMOS memory cell. During operation, the DMD controller loads a "1" or a "0" into each basic memory cell. When a mirror reset pulse is applied, each micromirror is electrostatically deflected approximately one hinge, achieving a corresponding + / -12° state. The two valid states are physically stopped by resistance from two spring-loaded pins, making the deflection angles repeatable. In a projection system, the +12° state corresponds to an "on" pixel, and the -12° state corresponds to an "off" pixel. Control is achieved by programming the on / off duty cycle of each mirror, and multiple light sources can be multiplexed to create full-color RGB images, achieving desired projection pattern effects.

[0036] The reflective assembly 43 in this embodiment includes a first reflector 431, disposed beneath the heat dissipation substrate 10, for reflecting light from the projection illuminator 41, and a second reflector 432, for receiving the collimated light reflected by the first reflector 431 and converging it onto the digital micromirror device 42. The first reflector 431 is a parabolic reflector, with the projection illuminator 41 located at its focal point. Furthermore, in this embodiment, the second reflector 432 is a freeform reflector. Light emitted by the projection illuminator 41 is reflected by the first reflector 431 as collimated light directed vertically upward. This light is then converging onto the DMD via the second reflector 432.

[0037] Example 3

[0038] like Figure 5As shown, this embodiment is similar in structure and principle to Embodiments 1 and 2, with the difference being that the projection light source 40 described in this embodiment includes a projection illuminator 41 disposed below the heat dissipation substrate 10, a light-collecting lens 44 disposed in the optical path of the projection illuminator 41, a digital micromirror device (DMD) 42 disposed corresponding to the second lens portion 52, and a first reflective assembly 45 for reflecting and converging light emitted by the projection illuminator 41 onto the DMD 42. Light emitted by the projection illuminator 41 is collected by the light-collecting lens 44 to produce parallel light rays, which are then reflected and converged onto the DMD by the first reflective assembly 45. Finally, the light is formed by the second lens portion 52 to form a projection pattern.

[0039] The light-collecting lens 44 in this embodiment may be a single lens or a lens group formed by at least two lenses.

[0040] In this embodiment, the first reflective assembly 45 includes a first reflector 451 for reflecting light received by the light-collecting lens 44, and a third reflector 452 for receiving the light reflected by the first reflector 451 and converging it onto the digital micromirror device 42. Furthermore, in this embodiment, the third reflector 452 is a free-form surface reflector. Light emitted by the projector 41 is collected by the light-collecting lens 44 and then reflected by the first reflector 451, redirecting it upward. The light then passes through the third reflector 452, converging it onto the DMD, and finally forming an image through the second lens unit 52.

[0041] Example 4

[0042] like Figure 6 As shown, this embodiment is similar in structure and principle to Examples 1-3, with the difference being that the projection light source 40 described in this embodiment includes a projection illuminator 41 disposed below the heat dissipation substrate 10, a TIR lens 46 disposed in the optical path of the projection illuminator 41, a digital micromirror device 42 disposed corresponding to the second lens portion 52, and a second reflective assembly 47 for reflecting and converging the light collected by the TIR lens 46 onto the digital micromirror device 42. Light emitted by the projection illuminator 41 is collimated by the TIR lens 46, then reflected and converged by the second reflective assembly 47 onto the DMD, and finally imaged by the second lens portion 52 to form a projection pattern.

[0043] In this embodiment, the second reflective assembly 47 includes a second reflector 471 for reflecting the light collimated by the TIR lens 46, and a fourth reflector cup 472 for receiving the light reflected by the second reflector 471 and converging it onto the digital micromirror device 42. Furthermore, in this embodiment, the fourth reflector cup 472 is a free-form surface reflector. Light emitted by the projection illuminator 41 is collimated by the TIR lens 46, then reflected by the second reflector 471, redirecting it upward. The light then passes through the fourth reflector cup 472, converging it onto the DMD, and finally forming an image through the second lens unit 52.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A vehicle lamp, characterized in that: include: A heat dissipation substrate, a low-beam light source arranged above the heat dissipation substrate and used to emit illumination light, a light cutter arranged on the optical path of the low-beam light source and capable of forming the illumination light into a low-beam light type, a projection light source for realizing a projection function, and a light output lens; the light output lens includes a first lens portion for emitting light from the low-beam light source, and a second lens portion for emitting light from the projection light source; the second lens portion is an imaging lens group, and the second lens portion is located above the first lens portion; the projection light source is a micro light-emitting diode provided with a phosphor layer; or the projection light source includes a projection light source and a digital micromirror device arranged on the optical path of the projection light source.

2. The vehicle lamp according to claim 1, characterized in that The projection light source is a micro light emitting diode provided with a phosphor layer. The projection light source is arranged above the low beam light source and corresponds to the second lens portion.

3. The vehicle lamp according to claim 1, characterized in that The projection light source includes a projection illuminator disposed below the heat dissipation substrate, a digital micromirror device disposed corresponding to the second lens portion, and a reflective component for reflecting and converging light emitted by the projection illuminator onto the digital micromirror device.

4. The vehicle lamp according to claim 3, characterized in that The reflective assembly includes a first reflective cup disposed below the heat dissipation substrate and used to reflect light from the projection luminous body, and a second reflective cup used to receive the collimated light reflected by the first reflective cup and converge the light onto the digital micromirror device. The first reflective cup is a parabolic reflective cup, and the projection luminous body is located at the focal position of the parabolic reflective cup.

5. The vehicle lamp according to claim 1, characterized in that The projection light source includes a projection light-emitting body arranged below the heat dissipation substrate, a light-collecting lens arranged on the light path of the projection light-emitting body, a digital micromirror device arranged corresponding to the second lens portion, and a first reflection component for reflecting and converging the light emitted by the projection light-emitting body onto the digital micromirror device.

6. The vehicle lamp according to claim 5, characterized in that The first reflective component includes a first reflector for reflecting the light collected by the light-collecting lens, and a third reflective cup for receiving the light reflected by the first reflector and converging the light onto the digital micromirror device.

7. The vehicle lamp according to claim 1, characterized in that The projection light source includes a projection light-emitting body arranged below the heat dissipation substrate, a TIR lens arranged on the optical path of the projection light-emitting body, a digital micromirror device arranged corresponding to the second lens portion, and a second reflection component for reflecting and converging the light collected by the TIR lens onto the digital micromirror device.

8. The vehicle lamp according to claim 7, characterized in that: The second reflective component includes a second reflector for reflecting the light collimated by the TIR lens, and a fourth reflective cup for receiving the light reflected by the second reflector and converging the light onto the digital micromirror device.

9. The vehicle lamp according to any one of claims 1 to 8, characterized in that: The low beam light source includes a low beam illuminator disposed above a substrate, and a low beam reflector cup covered on the low beam illuminator, and the low beam illuminator is disposed at one focal position of the low beam reflector cup.

10. The vehicle lamp according to any one of claims 1 to 8, characterized in that: The first lens portion and the second lens portion are integrally formed; and / or the light cutting plate and the heat dissipation substrate are integrally formed; and / or the light incident surface of the light output lens is circular.

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