A vehicle lamp lighting system, method and intelligent vehicle lamp

Abstract

The present invention relates to the field of vehicle lighting, and discloses a vehicle lighting system, method and intelligent vehicle lighting, wherein the system comprises: a laser light source module, a first optical component, a second optical component, a DMD chip and a third optical component, wherein the light emitted by the laser light source module passes through the first optical component and is reflected by the second optical component to the DMD chip, so that the third optical component projects the light projected by the DMD chip; the laser light source module, the first lighting lens, the diffuser, the second lighting lens, the wavelength conversion material, the third lighting lens and the fourth lighting lens are coaxial and form a preset first angle with a horizontal plane, the angle between the first reflector and the horizontal plane is a preset second angle interval, the angle between the second reflector and the horizontal plane is a preset third angle interval, the central axis of the fifth lighting lens deviates from the preset first angle in a direction away from the DMD chip, and the first reflector and the second reflector extend upward in opposite directions, so as to project different patterns.

Description

Technical Field

[0001] The present invention relates to the field of vehicle lighting, and in particular to a vehicle lighting system, method and intelligent vehicle lighting. Background Art

[0002] Projection equipment has a wide range of uses, such as projectors in offices, projection equipment in cinemas, etc., which are used to project light onto a screen and project the required pattern on the screen.

[0003] The headlights of a car are the biggest guarantee for safe driving at night. In addition to the anti-glare function, they also project images on the ground to achieve human-vehicle interaction. However, in the prior art, the pattern projected on the ground is determined by the shields with various patterns installed on the headlights. The shields are switched manually or automatically, so the patterns that can be projected on the ground are very limited and not smart enough. At the same time, the conversion efficiency of the lighting system in the prior art is low and the structure is complex. Summary of the invention

[0004] The present invention will solve the technical problem that the existing vehicle lamp lighting system cannot project the required pattern on the ground, improve the conversion efficiency of the entire lighting system, and provide a vehicle lamp lighting system, method and intelligent vehicle lamp.

[0005] The technical solution provided by the present invention is as follows:

[0006] A vehicle lighting system comprises: a laser light source module, a first optical component, a second optical component, a DMD chip and a third optical component, wherein the light emitted by the laser light source module passes through the first optical component and is reflected by the second optical component to the DMD chip, so that the third optical component projects the light projected by the DMD chip;

[0007] The first optical component includes a first lighting lens, a diffuser, a second lighting lens, a wavelength conversion material, a third lighting lens, and a fourth lighting lens arranged in sequence, and the fourth lighting lens is an aspherical lens;

[0008] The second optical component comprises a first reflector, a fifth illumination lens and a second reflector which are arranged in sequence, and the fifth illumination lens is an aspherical lens;

[0009] The third optical assembly comprises a first projection lens, a second projection lens, a third projection lens, an aperture, a fourth projection lens and a fifth projection lens arranged in sequence, wherein the third projection lens is close to the aperture and has a negative focal length;

[0010] The laser light source module, the first illumination lens, the diffuser, the second illumination lens, the wavelength conversion material, the third illumination lens, and the fourth illumination lens are coaxial and form a preset first angle with the horizontal plane. The central axis of the fifth illumination lens deviates from the preset first angle in a direction away from the DMD chip. The angle between the first reflector and the horizontal plane is in a preset second angle range. The angle between the second reflector and the horizontal plane is in a preset third angle range. The first reflector and the second reflector extend upward in opposite directions.

[0011] In the present technical solution, according to the actual projection size, the structure of the illumination light path is designed so that the laser light emitted by the laser light source module can be irradiated to the part of the DMD chip that needs to be irradiated after passing through the illumination light path, and finally projected through the projection light path after being reflected by the DMD chip. In the whole process, the pattern projected by the DMD chip can be adjusted according to actual needs, and since all the light passing through the illumination light path hits a part of the DMD chip, the waste of light energy is reduced and the conversion efficiency of the entire headlight illumination light path is improved. In addition, the light path is folded by the first reflector to reduce the length of the illumination light path, and the light direction is changed again by the second reflector, so that the light can be irradiated on the DMD chip with the greatest efficiency, so that the light reflected by the DMD chip will not interfere with the second reflector. The third projection lens is close to the aperture and has a negative focal length, which is used to improve the chromatic aberration of the projection light path so that the lighting system maintains a high contrast.

[0012] Preferably, the optical focal power of the first illumination lens is positive, the optical focal power of the second illumination lens is positive, the optical focal power of the third illumination lens is positive, the optical focal power of the fourth illumination lens is positive, and the optical focal power of the fifth illumination lens is positive.

[0013] Preferably, the optical focal power of the first projection lens is positive, the optical focal power of the second projection lens is positive, the optical focal power of the third projection lens is negative, the optical focal power of the fourth projection lens is negative, and the optical focal power of the fifth projection lens is positive.

[0014] Preferably, the focal length f of the first illumination lens is 102 Located in a first illumination focal length interval;

[0015] The thickness of the diffuser is d 103 <3 mm;

[0016] The focal length f of the second illumination lens 104 Located in the second illumination focal length interval;

[0017] The focal length f of the third illumination lens 105 Located in the second illumination focal length interval;

[0018] The second lighting lens and the third lighting lens have the same shape, and the second lighting lens and the third lighting lens are symmetrical to each other;

[0019] The fourth illumination lens has a focal length f 106 Located in the third illumination focal length interval.

[0020] In this technical solution, the light source emitted by the laser light source module is expanded into a light beam with a larger beam width through the first illumination lens, and the uniformity of the beam is adjusted by a diffuser. Then, the light is shaped and converged through the second illumination lens to form a light spot irradiated on the fluorescent color wheel, and the fluorescent color wheel converts the light into the required white light. Then, it is irradiated to the first reflector through the third illumination lens and the fourth illumination lens. After being reflected by the first reflector, the light is expanded to a certain extent through the fifth illumination lens and hits the reflector at a suitable angle. Then, it is reflected to the DMD chip through the second reflector.

[0021] Preferably, the focal length f of the first projection lens is 301 The focal length of the second projection lens is between 40 mm and 60 mm. 302 The radius of curvature of the fourth projection lens near the aperture is between 20 mm and 30 mm. 305a The curvature radius r of the fourth projection lens away from the aperture is between 20 mm and 30 mm. 305b The refractive index Nd of the fifth projection lens is between 20 mm and 30 mm. 305 The focal length f of the fifth projection lens is between 1.7 and 1.85; 306 Between 30mm and 50mm.

[0022] In this technical solution, the first projection lens and the second projection lens can effectively reduce the coma of the projection lens and improve the imaging quality. The intensity of the light beam passing through is adjusted by the aperture, and then realized by the fourth projection lens and the fifth projection lens respectively.

[0023] Preferably, the effective focal length range of the third optical component is 25 mm to 32 mm.

[0024] A vehicle lamp lighting method, using the vehicle lamp lighting system, comprises the following steps:

[0025] The laser light emitted by the laser light source module is incident on the diffusion sheet through the first illumination lens in sequence, and forms a light spot through the diffusion sheet and is incident on the second illumination lens;

[0026] The light rays converged by the second illumination lens are incident on the wavelength conversion component in sequence, and the white light beams converted by the wavelength conversion component are incident on the third illumination lens and the fourth illumination lens;

[0027] After being reflected by the first reflector to the fifth illumination lens, it is reflected by the second reflector to the preset area of ​​the DMD chip, and then reflected by the DMD chip to the third optical component for illumination projection.

[0028] An intelligent vehicle lamp comprises the vehicle lamp lighting system.

[0029] Compared with the prior art, the vehicle lighting system, method and intelligent vehicle lighting provided by the present invention have the following beneficial effects:

[0030] The vehicle lighting system of the present invention can project different patterns, and because all the light passing through the lighting light path hits a part of the DMD chip, the waste of light energy is reduced, and the conversion efficiency of the entire vehicle lighting light path is improved. When it is applied to a car, as a headlamp, it can project the required pattern onto the ground, and at the same time meet the lighting requirements of the car's headlamp, and the illumination of the brightest spot in the center can reach more than 150lx. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of a vehicle lamp lighting system.

[0032] Figure 1 is a schematic structural diagram of a vehicle lamp lighting system of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the structure of the first optical component, the second optical component and the DMD chip;

[0034] Figure 3 yes Figure 1 Schematic diagram of the surface structure of the first optical component, the second optical component and each optical element in the DMD chip;

[0035] Figure 4 This is a schematic diagram of the structure of the third optical component and the DMD chip of the present invention.

[0036] Figure 5 It is a schematic diagram of the projection area of ​​the present invention.

[0037] Description of Figure Numbers:

[0038] Laser light source module 100;

[0039] A first optical assembly 200, a first lighting lens 201, a diffusion sheet 202, a second lighting lens 203, a fluorescent color wheel 204, a third lighting lens 205, and a fourth lighting lens 206;

[0040] The second optical component 300, M1-first reflector, the fifth illumination lens 301, M2-second reflector

[0041] DMD chip 400;

[0042] The third optical component 500 , the first projection lens 501 , the second projection lens 502 , the third projection lens 503 , the aperture 504 , the fourth projection lens 505 , and the fifth projection lens 506 . DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0044] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0045] According to an embodiment provided by the present invention, Figure 1 As shown, a vehicle lamp lighting system includes: a laser light source module 100, a first optical component 200, a second optical component 300, a DMD chip 400 and a third optical component 500. The light emitted by the laser light source module 100 passes through the first optical component 200 and is reflected by the second optical component 300 to the DMD chip 400, so that the third optical component 500 projects the light projected by the DMD chip 400. The first optical component 200 and the second optical component 300 form an illumination light path, and the third optical component 500 forms a projection light path, so that all the light from the illumination light path hits a part of the DMD chip 400 and is reflected to the projection light path. The projection light path then projects the light reflected by the DMD chip 400, thereby projecting the required pattern on the ground and illuminating the front.

[0046] like Figure 2 As shown, the first optical component 200 includes a first illumination lens 201, a diffuser 202, a second illumination lens 203, a wavelength conversion material, a third illumination lens 205, and a fourth illumination lens 206 which are arranged in sequence, and the fourth illumination lens 206 is an aspherical lens;

[0047] The second optical component 300 includes a first reflector, a fifth illumination lens 301 and a second reflector which are arranged in sequence, wherein the fifth illumination lens 301 is an aspherical lens;

[0048] The optical focal power of the first illumination lens 201 is positive, the optical focal power of the second illumination lens 203 is positive, the optical focal power of the third illumination lens 205 is positive, the optical focal power of the fourth illumination lens 206 is positive, and the optical focal power of the fifth illumination lens 301 is positive.

[0049] The laser light source module 100, the first illumination lens 201, the diffuser 202, the second illumination lens 203, the wavelength conversion material, the third illumination lens 205, and the fourth illumination lens 206 are coaxial and form a preset first angle with the horizontal plane. The angle between the first reflector and the horizontal plane is a preset second angle interval, the angle between the second reflector and the horizontal plane is a preset third angle interval, the central axis of the fifth illumination lens 301 deviates from the preset first angle in a direction away from the DMD chip 400, and the first reflector and the second reflector extend upward in opposite directions. Specifically, the first reflector is inclined from bottom to top along its height direction toward the direction where the DMD chip 400 is located, and the second reflector is inclined from bottom to top along its height direction toward the direction away from the DMD chip 400.

[0050] Among them, the preset first angle may include 12°; the preset second angle interval may preferably include 30° to 50°; and the preset third angle interval may preferably include 20° to 40°.

[0051] The third optical component 500 includes a first projection lens 501, a second projection lens 502, a third projection lens 503, an aperture 504, a fourth projection lens 505 and a fifth projection lens 506 arranged in sequence. The third projection lens 503 is close to the aperture 504 and has a negative focal length.

[0052] The optical focal power of the first projection lens 501 is positive, the optical focal power of the second projection lens 502 is positive, the optical focal power of the third projection lens 503 is negative, the optical focal power of the fourth projection lens 505 is negative, and the optical focal power of the fifth projection lens 506 is positive.

[0053] Wherein, the effective focal length range of the third optical component 500 is 25 mm to 32 mm.

[0054] As shown by arrow A in the figure, the laser light source module 100 emits a laser beam which passes through the first illumination lens 201, the compound eye lens, the second illumination lens 203, the third illumination lens 205, the fluorescent color wheel 204, the fourth illumination lens 206, and the fifth illumination lens 301 in sequence, and is then reflected by the first reflector, and then is reflected by the second reflector onto the DMD chip 400 after passing through the sixth illumination lens. The laser beam reflected by the DMD chip 400 passes through the first projection lens 501, the second projection lens 502, the third projection lens 503, the fourth projection lens 505, the aperture 504, the fifth projection lens 506, and the sixth projection lens in sequence, and is then projected out.

[0055] When it is used as a headlamp in a car, the lighting light path of the lamp replaces the headlamp, and can project a required pattern on the ground, or illuminate a certain area in front of the car, which meets the lighting requirements of the car's headlamp.

[0056] The parameters of the various lenses described above (corresponding focal length, radius of curvature of the front surface, radius of curvature of the back surface, material refractive index, material Abbe number, and distance between adjacent surfaces) are obtained using different values ​​in Examples 1 to 3, which are recorded in Tables 1 to 6 respectively.

[0057]

Table 1

[0058]

[0059]

[0060]

[0061] In Table 1, the distance between adjacent surfaces represents the distance from the midpoint of the surface corresponding to the row to the midpoint of the surface of the next row. The surface numbers are numbered along the penetration order of the laser. For example, the surface of the first illumination lens close to the laser light source module is S1, the surface of the first illumination lens far from the laser light source module is S2, and so on.

[0062]

Table 2

[0063]

[0064] In Table 2, the distance between adjacent surfaces represents the distance from the midpoint of the surface corresponding to the row to the midpoint of the surface of the next row. The surface numbers are numbered along the penetration order of the laser. For example, the surface of the first projection lens 501 close to the DMD chip 400 is Y1, the surface of the first projection lens 501 far from the DMD chip 400 is Y2, and so on.

[0065] In Example 1, the laser emitted by the laser light source module 100 passes through the first optical component 200 and the second optical component 300 and hits 3 / 4 of the DMD chip 400, that is, 3 / 4 of the DMD chip 400 is illuminated, and is reflected by the DMD chip 400, and then projected through the third optical component 500. The angle of the projected light is 18°×13° (horizontal direction×vertical direction), and the projection area 25m in front of the car is 8m×5.55m (horizontal direction×vertical direction), and the illumination of the brightest point in the center is 210lx.

[0066] like Figure 4 As shown in the figure, the lighting area and the screen projection area represent the parts illuminated on the ground. The screen projection area is 5m to 25m in front of the car, and the lighting area is 25m in front of the car to infinity. The pattern to be projected is projected within the screen projection area. The anti-glare area in the figure actually refers to the area where the light is projected on the vertical plane 25 meters away from the front of the car, that is, the area is 8m×5.55m.

[0067] Embodiment 2:

[0068]

Table 3

[0069]

[0070]

[0071]

[0072]

Table 4

[0073]

[0074] The meanings in the table of this embodiment are the same as those in Embodiment 1.

[0075] In Example 2, the laser emitted by the laser light source module 100 passes through the first optical component 200 and the second optical component 300 and hits 73% of the area of ​​the DMD chip 400, that is, 73% of the DMD chip 400 is illuminated, and is reflected by the DMD chip 400, and then projected through the third optical component 500. The angle of the projected light is 16°×the preset first angle (horizontal direction×vertical direction), and the projection area 25m in front of the car is 7.0m×5.25m, and the illumination of the brightest point in the center is 264lx.

[0076] Embodiment 3:

[0077]

Table 5

[0078]

[0079]

[0080]

Table 6

[0081]

[0082]

[0083] The meanings in the table of this embodiment are the same as those in Embodiment 1.

[0084] In Example 3, the lasers emitted by the laser light source module of the first optical component 200 and the second optical component 300 all hit 77% of the area of ​​the DMD chip 400, that is, 77% of the DMD chip 400 is illuminated, and are reflected by the DMD chip 400 and then projected through the third optical component 500. The angle of the projected light is 19.6°×14° (horizontal direction×vertical direction), and the projection area 25m in front of the car is 8.64m×6.14m, and the illumination of the brightest point in the center is 180lx.

[0085] Embodiments 1 to 3 were applied to automobiles as headlights, and the conversion efficiency of the headlight lighting system was measured and listed in Table 7.

[0086]

Table 7

[0087]

[0088] The illuminance of the brightest point in the center of the headlamp in the prior art is 100lx~150lx, and the conversion efficiency of the optical system of the DLP projector in the prior art is 65. It can be seen from Table 7 that the conversion efficiency of Examples 1~3 is 5%~10% higher than that of the prior art, and light energy can be more fully utilized, and the illuminance of Examples 1~3 is significantly higher.

[0089] Based on the above embodiment, this embodiment provides a vehicle lamp lighting method, which uses the vehicle lamp lighting system and includes the following steps:

[0090] The laser light emitted by the laser light source module is incident on the diffusion sheet through the first illumination lens in sequence, and forms a light spot through the diffusion sheet and is incident on the second illumination lens;

[0091] The light rays converged by the second illumination lens are incident on the wavelength conversion component in sequence, and the white light beams converted by the wavelength conversion component are incident on the third illumination lens and the fourth illumination lens;

[0092] After being reflected by the first reflector to the fifth illumination lens, it is reflected by the second reflector to the preset area of ​​the DMD chip, and then reflected by the DMD chip to the third optical component for illumination projection.

[0093] Based on the above embodiments, this embodiment provides a smart vehicle lamp, including the vehicle lamp lighting system.

[0094] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A vehicle lighting system, characterized in that: include: A laser light source module, a first optical component, a second optical component, a DMD chip and a third optical component, wherein the light emitted by the laser light source module passes through the first optical component and is reflected by the second optical component to the DMD chip, so that the third optical component projects the light projected by the DMD chip; The first optical component includes a first lighting lens, a diffuser, a second lighting lens, a wavelength conversion material, a third lighting lens, and a fourth lighting lens arranged in sequence, and the fourth lighting lens is an aspherical lens; The second optical component comprises a first reflector, a fifth illumination lens and a second reflector which are arranged in sequence, and the fifth illumination lens is an aspherical lens; The third optical assembly comprises a first projection lens, a second projection lens, a third projection lens, an aperture, a fourth projection lens and a fifth projection lens arranged in sequence, wherein the third projection lens is close to the aperture; The laser light source module, the first illumination lens, the diffuser, the second illumination lens, the wavelength conversion material, the third illumination lens, and the fourth illumination lens are coaxial and form a preset first angle with the horizontal plane. The central axis of the fifth illumination lens deviates from the preset first angle in a direction away from the DMD chip. The angle between the first reflector and the horizontal plane is in a preset second angle range. The angle between the second reflector and the horizontal plane is in a preset third angle range. The first reflector and the second reflector extend upward in opposite directions. Wherein, the optical focal power of the first illumination lens is positive, the optical focal power of the second illumination lens is positive, the optical focal power of the third illumination lens is positive, the optical focal power of the fourth illumination lens is positive, and the optical focal power of the fifth illumination lens is positive; the optical focal power of the first projection lens is positive, the optical focal power of the second projection lens is positive, the optical focal power of the third projection lens is negative, the optical focal power of the fourth projection lens is negative, and the optical focal power of the fifth projection lens is positive; The preset first angle is 12°; the preset second angle range is 30°~50°; and the preset third angle range is 20°~40°.

2. A vehicle lighting system according to claim 1, characterized in that: The focal length f of the first illumination lens 102 Located in a first illumination focal length interval; The thickness of the diffuser is d 103 <3 mm; The focal length f of the second illumination lens 104 Located in the second illumination focal length interval; The focal length f of the third illumination lens 105 Located in the second illumination focal length interval; The second lighting lens and the third lighting lens have the same shape, and the second lighting lens and the third lighting lens are symmetrical to each other; The fourth illumination lens has a focal length f 106 Located in the third illumination focal length interval; The minimum value in the first illumination focal length interval is greater than the maximum value in the second illumination focal length interval; and the third illumination focal length interval is a subset of the second illumination focal length interval.

3. The vehicle lighting system according to claim 1, characterized in that: The focal length f of the first projection lens 301 Between 40mm and 60mm; The focal length of the second projection lens is f 302 Between 20mm and 30mm; The curvature radius r of the fourth projection lens near the aperture is 305a The curvature radius r of the fourth projection lens away from the aperture is between 20 mm and 30 mm. 305b The refractive index Nd of the fifth projection lens is between 20 mm and 30 mm. 305 Between 1.7 and 1.85; The focal length f of the fifth projection lens 306 Between 30mm and 50mm.

4. The vehicle lighting system according to claim 1, characterized in that: The effective focal length range of the third optical component is 25mm~32mm.

5. A vehicle lamp lighting method, characterized in that: The vehicle lighting system according to any one of claims 1 to 4 comprises the following steps: The laser light emitted by the laser light source module is incident on the diffusion sheet through the first illumination lens in sequence, and forms a light spot through the diffusion sheet and is incident on the second illumination lens; The light rays converged by the second illumination lens are incident on the wavelength conversion component in sequence, and the white light beams converted by the wavelength conversion component are incident on the third illumination lens and the fourth illumination lens; After being reflected by the first reflector to the fifth illumination lens, it is reflected by the second reflector to the preset area of ​​the DMD chip, and then reflected by the DMD chip to the third optical component for illumination projection.

6. A smart car light, characterized in that: It comprises a vehicle lighting system as described in any one of claims 1 to 5.

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