Vehicle lamp lighting method, system and vehicle lamp

Abstract

The present invention discloses a vehicle lamp lighting method, system and vehicle lamp, wherein the system comprises: an illumination optical path, a DMD chip and a projection optical path, wherein the illumination optical path comprises a laser light source module, a first illumination lens group, a wavelength conversion component and a second illumination lens group arranged in sequence; the laser emitted by the laser light source module forms a light spot through the first illumination lens group in sequence and is incident on the wavelength conversion component, and the white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then is reflected by the second reflector in the third illumination lens group to the DMD chip, and is reflected by the DMD chip to the projection optical path, so as to perform illumination projection. The vehicle lamp lighting system of the present invention can project the required pattern on the ground, and since all the light passing through the illumination optical path hits a part of the DMD chip, the waste of light energy is reduced, and the conversion efficiency of the entire lighting system is improved.

Description

Technical Field

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

[0004] The object of the present invention is to provide a vehicle lamp lighting method, system and vehicle lamp, wherein the vehicle lamp lighting system can not only project a required pattern on the ground, but also improve the conversion efficiency of the entire lighting system.

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

[0006] A vehicle lamp lighting method, comprising:

[0007] The laser emitted by the laser light source module passes through the first illumination lens group in sequence to form a light spot and is incident on the wavelength conversion component. The white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then reflected by the second reflector in the third illumination lens group to the DMD chip, and is reflected by the DMD chip to the projection light path for illumination projection.

[0008] A vehicle lighting system, comprising:

[0009] An illumination optical path, a DMD chip and a projection optical path, wherein the light emitted by the illumination optical path is incident on a part of the DMD chip and is reflected to the projection optical path, and the projection optical path then projects the light reflected by the DMD chip;

[0010] The illumination optical path includes a laser light source module, a first illumination lens group, a wavelength conversion component, and a second illumination lens group arranged in sequence;

[0011] The laser emitted by the laser light source module passes through the first illumination lens group in turn to form a light spot and is incident on the wavelength conversion component. The white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then reflected by the second reflector in the third illumination lens group to the DMD chip, and is reflected by the DMD chip to the projection light path for illumination projection.

[0012] Preferably, the first illumination lens group includes a first illumination lens, a fly-eye lens, a second illumination lens, and a third illumination lens arranged in sequence;

[0013] The first illumination lens is arranged opposite to the laser light source module, and is used to receive the laser light emitted by the laser light source module and transmit it to the fly-eye lens;

[0014] The fly-eye lens is used to receive and homogenize the laser light emitted by the first illumination lens, and transmit the laser light to the second illumination lens;

[0015] The third illumination lens is arranged opposite to the wavelength conversion component, and the second illumination lens and the third illumination lens collimate and transmit the homogenized laser light to the wavelength conversion component.

[0016] Preferably, the second lighting lens group includes a fourth lighting lens and a fifth lighting lens;

[0017] The third illumination lens group includes a first reflector, a sixth illumination lens and a second reflector;

[0018] The fourth lighting lens has the same shape as the third lighting lens, and the fourth lighting lens and the third lighting lens are symmetrical to each other.

[0019] Preferably, the laser light source module, the first illumination lens group, and the second illumination lens group are coaxial and form a preset first angle with the horizontal plane;

[0020] The angle interval between the first reflector and the horizontal plane is a preset second angle interval, and the angle interval between the second reflector and the horizontal plane is a preset third angle interval;

[0021] The central axis of the sixth illumination 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.

[0022] Preferably, the focal length f102 of the first illumination lens is between 40 mm and 70 mm;

[0023] The thickness d103 of the fly-eye lens is greater than 3 mm;

[0024] The focal length f104 of the second illumination lens is between -40 mm and -15 mm, and the absolute values ​​of the curvature radii of the front surface and the rear surface of the second illumination lens are equal;

[0025] The focal length f105 of the third illumination lens is between 15 mm and 40 mm;

[0026] The focal length f106 of the sixth illumination lens is between 40 mm and 50 mm.

[0027] Preferably, the focal length of the projection light path ranges from 27.5 mm to 29.5 mm.

[0028] Preferably, the projection optical path comprises a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, an aperture, a fifth projection lens and a sixth projection lens arranged in sequence, the first projection lens has a positive focal power, the second projection lens has a positive focal power, the third projection lens has a positive focal power, the fourth projection lens has a negative focal power, the fifth projection lens has a negative focal power, and the sixth projection lens has a positive focal power;

[0029] The first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens and the sixth projection lens are coaxial and parallel to the horizontal plane. The laser reflected by the DMD chip passes through the first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens and the sixth projection lens in sequence and is projected out.

[0030] Preferably, the focal length f301 of the first projection lens is between 60 mm and 100 mm;

[0031] The focal length f302 of the second projection lens is between 60 mm and 100 mm;

[0032] The third projection lens and the fourth projection lens are glued together to form a glued lens;

[0033] The curvature radius r305a of the fifth projection lens close to the aperture is between 15 mm and 25 mm, the curvature radius r305b of the fifth projection lens far from the aperture is between 40 mm and 50 mm, and the refractive index Nd305 of the fifth projection lens is between 1.5 and 1.65;

[0034] The focal length f306 of the sixth projection lens is between 40 mm and 55 mm.

[0035] In the above structure, the first projection lens and the second projection lens can effectively reduce the coma of the projection lens and improve the imaging quality. The third projection lens and the fourth projection lens form a cemented lens to improve the chromatic aberration of the projection light path and keep the illumination system at a high contrast. The intensity of the light beam passing through is adjusted by the aperture, and then realized by the fifth projection lens and the sixth projection lens respectively.

[0036] A vehicle lamp is also provided, comprising the vehicle lamp lighting system.

[0037] The vehicle lamp lighting system is applied to the headlight of the vehicle, and the pattern projected on the ground is controlled by the DMD chip. Compared with the prior art in which the pattern is only a limited number of baffle patterns, the pattern of the present invention is more diversified. Moreover, during the entire projection process, all light passing through the lighting light path hits a part of the DMD chip, without causing waste of light energy, thereby improving the conversion efficiency of the entire vehicle lamp lighting light path.

[0038] The present invention provides a vehicle lamp lighting method, system and vehicle lamp, which can bring the following beneficial effects:

[0039] 1) The vehicle lamp lighting system of the present invention can project different patterns, and since all light passing through the lighting light path hits a portion of the DMD chip, the waste of light energy is reduced and the conversion efficiency of the entire vehicle lamp lighting light path is improved.

[0040] 2) When it is used in a car, as a headlamp, it can project the required pattern onto the ground, while meeting the lighting requirements of the car's headlamp. The illumination of the brightest spot in the center can reach more than 150lx.

[0041] 3) In the present invention, since the parameters of the lens are specifically set, the picture ratio does not need to be designed according to the ratio of the DMD. The specific parameters of the lens are coordinated to achieve non-uniform light illumination, and the light distribution pattern is close to the light distribution of the car light, avoiding light waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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 the vehicle lamp lighting system and its application.

[0043] Figure 1 is a schematic structural diagram of a vehicle lamp lighting system of the present invention;

[0044] Figure 2 yes Figure 1 Schematic diagram of the illumination optical path and DMD chip structure;

[0045] Figure 3 yes Figure 1 A schematic diagram of the structure of the projection light path in FIG.

[0046] Figure 4 It is a schematic diagram of the projection area of ​​the present invention.

[0047] Description of Figure Numbers:

[0048] 10-illumination optical path, 101-laser light source module, 102-first illumination lens, 103-compound eye lens, 104-second illumination lens, 105-third illumination lens, 106-wavelength conversion component, 107-fourth illumination lens, 108-fifth illumination lens, 109-sixth illumination lens, 20-DMD chip, 30-projection optical path, 301-first projection lens, 302-second projection lens, 303-third projection lens, 304-fourth projection lens, 305-aperture, 306-fifth projection lens, 307-sixth projection lens, M1-first reflector, M2-second reflector. DETAILED DESCRIPTION

[0049] 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.

[0050] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.

[0051] [Examples 1 to 3]

[0052] like Figure 1 to Figure 4 As shown, the embodiment discloses a specific implementation of the vehicle light lighting system, which includes: an illumination light path, a DMD chip and a projection light path, wherein the light emitted from the illumination light path is incident on a part of the DMD chip and is reflected to the projection light path, and the projection light path then projects the light reflected by the DMD chip, thereby projecting the required pattern on the ground and illuminating the front.

[0053] like Figure 2 As shown, the illumination light path includes a laser light source module, a first illumination lens, a compound eye lens, a second illumination lens, a third illumination lens, a wavelength conversion component, a fourth illumination lens, a fifth illumination lens, a first reflector, a sixth illumination lens and a second reflector arranged in sequence, wherein the fourth illumination lens has the same shape as the third illumination lens, and the fourth illumination lens and the third illumination lens are symmetrical to each other.

[0054] The optical power of the first illumination lens is positive, the optical power of the second illumination lens is negative, the optical power of the third illumination lens is positive, the optical power of the fourth illumination lens is positive, the optical power of the fifth illumination lens is positive, and the optical power of the sixth illumination lens is positive.

[0055] Among them, the wavelength conversion component can include a device such as a fluorescent color wheel that can convert a white light beam. It should be noted that when the optical focal length is positive, the refraction of the parallel light beam is convergent; when the optical focal length is negative, the refraction is divergent, so the parallel light beam remains a parallel light beam after being incident. At the same time, the third illumination lens and the fourth illumination lens are symmetrically designed to reduce costs.

[0056] Structurally, the laser light source module, the first illumination lens, the compound eye lens, the second illumination lens, the third illumination lens, the wavelength conversion component, the fourth illumination lens, and the fifth illumination lens are coaxial and form an angle of 12° with the horizontal plane, that is, a line B parallel to the horizontal plane extends from the center of the laser light source module, and the angle between the coaxial line B and the direction away from the DMD chip is 12°. The angle between the first reflector and the horizontal plane is 34°~46°, and the angle between the second reflector and the horizontal plane is 24°~36°. Along the direction of travel of the laser, the central axis of the sixth illumination lens deviates by 12° in the direction away from the DMD chip, 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 is located, and the second reflector is inclined from bottom to top along its height direction toward the direction away from the DMD chip.

[0057] like Figure 3 As shown, the effective focal length range of the projection light path is 27.5 mm to 29.5 mm, and the focal number range of the projection light path is between 27.5 mm and 29.5 mm.

[0058] The projection optical path includes a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, an aperture, a fifth projection lens and a sixth projection lens which are arranged in sequence, wherein the third projection lens and the fourth projection lens are glued together to form a glued lens.

[0059] The focal power of the first projection lens is positive, the focal power of the second projection lens is positive, the focal power of the third projection lens is positive, the focal power of the fourth projection lens is negative, the focal power of the fifth projection lens is negative, and the focal power of the sixth projection lens is positive. The first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens, and the sixth projection lens are coaxial and parallel to the horizontal plane.

[0060] like Figure 2As shown in the figure, the direction of travel of the laser is shown by arrow A. The laser emitted by the laser light source module passes through the first illumination lens, the compound eye lens, the second illumination lens, the third illumination lens, the wavelength conversion component, the fourth illumination lens, and the fifth illumination lens in sequence, and is reflected by the first reflector. After passing through the sixth illumination lens, it is reflected by the second reflector to the DMD chip. The laser reflected by the DMD chip passes through the first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens, and the sixth projection lens in sequence to be projected out.

[0061] 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.

[0062] 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.

[0063] Embodiment 1:

[0064]

Table 1

[0065]

[0066]

[0067] 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.

[0068]

Table 2

[0069]

[0070]

[0071] 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 close to the DMD chip is Y1, the surface of the first projection lens far from the DMD chip is Y2, and so on.

[0072] The laser emitted by the laser light source module in Example 1 passes through the illumination optical path and is incident on 3 / 4 of the DMD chip, that is, 3 / 4 of the DMD chip is illuminated, and is reflected by the DMD chip, and then projected out through the projection optical path. 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.

[0073] 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.

[0074] Embodiment 2:

[0075]

Table 3

[0076]

[0077]

[0078]

Table 4

[0079]

[0080]

[0081] The meanings in the table of this embodiment are the same as those in Embodiment 1.

[0082] In Example 2, the laser emitted by the laser light source module passes through the illumination optical path and is incident on 73% of the area of ​​the DMD chip, that is, 73% of the DMD chip is illuminated, and is reflected by the DMD chip and then projected out through the projection optical path. The angle of the projected light is 17.8°×13° (horizontal direction×vertical direction), and the projection area 25m in front of the car is 7.8m×5.55m, and the illumination of the brightest point in the center is 214lx.

[0083] Embodiment 3:

[0084]

Table 5

[0085]

[0086]

[0087]

Table 6

[0088]

[0089]

[0090] The meanings in the table of this embodiment are the same as those in Embodiment 1.

[0091] In Example 3, the laser emitted by the laser light source module passes through the illumination optical path and is incident on 77% of the area of ​​the DMD chip, that is, 77% of the DMD chip is illuminated, and is reflected by the DMD chip and then projected out through the projection optical path. The angle of the projected light is 18.2°×13° (horizontal direction×vertical direction), and the projection area 25m in front of the car is 8.2m×5.55m, and the illumination of the brightest point in the center is 203lx.

[0092] 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.

[0093]

Table 7

[0094]

[0095] 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.

[0096] In the present invention, since the parameters of the lens are specifically set, the picture ratio does not need to be designed according to the ratio of the DMD. The specific parameters of the lens are coordinated to achieve non-uniform light illumination, and the light distribution pattern is close to the light pattern distribution of the car light, avoiding light waste.

[0097] Example 4

[0098] The present invention further provides a vehicle lamp lighting method, which performs lighting by using the vehicle lamp lighting system of any one of embodiments 1 to 3.

[0099] In this embodiment, the laser emitted by the laser light source module passes through the first illumination lens group in sequence to form a light spot and is incident on the wavelength conversion component. The white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then is reflected by the second reflector in the third illumination lens group to the DMD chip, and is reflected by the DMD chip to the projection light path for illumination projection.

[0100] This embodiment can improve the conversion efficiency of vehicle lamp lighting, while increasing the brightness and illumination area of ​​the vehicle lamp.

[0101] Example 5

[0102] The present invention further provides a vehicle lamp, which uses the vehicle lamp lighting system in any one of embodiments 1 to 3 for lighting.

[0103] Specifically, the headlights may include front headlights of a car. When headlight lighting and projection are required, the headlight lighting system of any one of items 1 to 3 is implemented to enable the headlights to perform lighting and projection with high conversion rate, high brightness and large area.

[0104] 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: An illumination optical path, a DMD chip and a projection optical path, wherein the light emitted by the illumination optical path is incident on a part of the DMD chip and is reflected to the projection optical path, and the projection optical path then projects the light reflected by the DMD chip; The illumination optical path includes a laser light source module, a first illumination lens group, a wavelength conversion component, and a second illumination lens group arranged in sequence; The laser light source module emits a laser light spot through the first illumination lens group in sequence, and then is incident on the wavelength conversion component. The white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and then is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then is reflected by the second reflector in the third illumination lens group to the DMD chip, and then is reflected by the DMD chip to the projection light path, so as to perform illumination projection. Wherein, the first illumination lens group includes a first illumination lens, a fly-eye lens, a second illumination lens, and a third illumination lens arranged in sequence; The second lighting lens group includes a fourth lighting lens and a fifth lighting lens; The third illumination lens group includes a first reflector, a sixth illumination lens and a second reflector; The fourth lighting lens has the same shape as the third lighting lens, and the fourth lighting lens and the third lighting lens are symmetrical to each other; The laser light source module, the first illumination lens group, and the second illumination lens group are coaxial and form an angle of 12° with the horizontal plane; The angle between the first reflector and the horizontal plane is in the range of 34° to 46°, and the angle between the second reflector and the horizontal plane is in the range of 24° to 36°; The central axis of the sixth illumination lens deviates by 12° in a direction away from the DMD chip, and the first reflector and the second reflector extend upward in opposite directions; The projection optical path includes a first projection lens, a second projection lens, a third projection lens, a fourth projection lens, an aperture, a fifth projection lens and a sixth projection lens arranged in sequence; 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 positive, the optical focal power of the fourth projection lens is negative, the optical focal power of the fifth projection lens is negative, and the optical focal power of the sixth projection lens is positive; the optical focal power of the first illumination lens is positive, the optical focal power of the second illumination lens is negative, the optical focal power of the third illumination lens is positive, the optical focal power of the fourth illumination lens is positive, the optical focal power of the fifth illumination lens is positive, and the optical focal power of the sixth illumination lens is positive.

2. The vehicle lighting system according to claim 1, characterized in that: The first illumination lens is arranged opposite to the laser light source module, and is used to receive the laser light emitted by the laser light source module and transmit it to the fly-eye lens; The fly-eye lens is used to receive and homogenize the laser light emitted by the first illumination lens, and transmit the laser light to the second illumination lens; The third illumination lens is arranged opposite to the wavelength conversion component, and the second illumination lens and the third illumination lens collimate and transmit the homogenized laser light to the wavelength conversion component.

3. The vehicle lighting system according to claim 2, characterized in that: The focal length f of the first illumination lens 102 Between 40mm and 70mm; The thickness d of the fly-eye lens 103 >3mm; The focal length f of the second illumination lens 104 The curvature radius of the front surface and the rear surface of the second illumination lens are equal in absolute value; The focal length f of the third illumination lens 105 Between 15mm and 40mm; The focal length f of the sixth illumination lens 106 Between 40mm and 50mm.

4. The vehicle lighting system according to claim 1, characterized in that: The focal length of the projection light path ranges from 27.5 mm to 29.5 mm.

5. The vehicle lighting system according to claim 1, characterized in that: The first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens and the sixth projection lens are coaxial and parallel to the horizontal plane. The laser reflected by the DMD chip passes through the first projection lens, the second projection lens, the third projection lens, the fourth projection lens, the aperture, the fifth projection lens and the sixth projection lens in sequence and is projected out.

6. The vehicle lighting system according to claim 5, characterized in that: The focal length f of the first projection lens 301 Between 60mm and 100mm; The focal length of the second projection lens is f 302 Between 60mm and 100mm; The third projection lens and the fourth projection lens are glued together to form a glued lens; The curvature radius r of the fifth projection lens near the aperture is 305a The curvature radius r of the fifth projection lens away from the aperture is between 15 mm and 25 mm. 305b The refractive index Nd of the fifth projection lens is between 40 mm and 50 mm. 305 Between 1.5 and 1.65; The focal length f of the sixth projection lens 306 Between 40mm and 55mm.

7. A vehicle lamp lighting method, characterized in that: The vehicle lighting system according to any one of claims 1 to 6 comprises: The laser emitted by the laser light source module passes through the first illumination lens group in sequence to form a light spot and is incident on the wavelength conversion component. The white light beam converted by the wavelength conversion component is incident on the second illumination lens group, and is reflected by the first reflector in the third illumination lens group to the sixth illumination lens in the third illumination lens group, and then reflected by the second reflector in the third illumination lens group to the DMD chip, and is reflected by the DMD chip to the projection light path for illumination projection.

8. A vehicle lamp, characterized in that: A vehicle lighting system comprising the vehicle lighting system as described in any one of claims 1 to 6.

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