CN210165315U - Automobile projection lamp - Google Patents
Automobile projection lamp Download PDFInfo
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- CN210165315U CN210165315U CN201921261036.XU CN201921261036U CN210165315U CN 210165315 U CN210165315 U CN 210165315U CN 201921261036 U CN201921261036 U CN 201921261036U CN 210165315 U CN210165315 U CN 210165315U
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Abstract
The poor or image quality of formation of image quality when improving of automobile projection lamp formation of image quality among the prior art darkens, problem with high costs, the utility model provides an automobile projection lamp. An automobile projection lamp comprises a shell, and a light-emitting module, a light-gathering module, a film module and an imaging module which are sequentially arranged in the shell along a light path; the imaging module comprises a first imaging lens and a second imaging lens, wherein the curvature radii of the first imaging lens and the second imaging lens are reciprocal, and the conical coefficients and the lens thickness of the first imaging lens and the second imaging lens are the same; the first imaging lens and the second imaging lens are arranged in a mirror symmetry mode on a light path. The utility model provides an automobile projection lamp can reduce manufacturing cost. The imaging module adopts a Gaussian structure, and has a large aperture design, so that the system can obtain a larger light entering amount, and under the same light source, the imaging can be brighter. The dispersion of the Gaussian structure is small, and the uniformity of the colors of the projected patterns is ensured.
Description
Technical Field
The utility model relates to an automobile field especially indicates car projection lamp field.
Background
With the popularization of automobiles and the pursuit of people for quality of life, the individuation of automobile lamps is more and more prominent, projection lamps, welcome blanket lamps and the like are not owned by high-end automobile types, the projection lamps are already assembled on a plurality of middle-low-grade automobiles, and the projection of a specified pattern is not difficult to do in the prior art.
Existing automotive projection lamps typically include a light emitting module, a light focusing module, a film module, an imaging module, and a housing. The light emitting module, the light condensing module, the film module and the imaging module are sequentially arranged in the shell on a light path, and the film module is designed with projection patterns. The working principle is as follows: the light emitted by the light emitting module is condensed by the light condensing module and then emitted by the film module, and the projected image on the film module is projected after being amplified by the imaging module.
The projection quality of the automobile projection lamp is related to the design of the light condensing module and the imaging module, and the imaging module has the largest influence on the projection quality; the existing condensing module usually adopts a single convex lens to condense light so as to enable a light source to uniformly enter a film module, the existing imaging module usually comprises 1-3 lenses, the single lens has the advantages of low manufacturing cost and low installation cost when used for imaging, but the imaging quality is poor, the existing part adopts 2-3 common convex lenses for imaging, the imaging quality is slightly improved, but the aperture of the imaging system is small, the projected image is dark, and meanwhile, the cost is further increased.
SUMMERY OF THE UTILITY MODEL
The poor or image quality of formation of image quality when improving of automobile projection lamp formation of image quality among the prior art darkens, problem with high costs, the utility model provides an automobile projection lamp.
The utility model provides an automobile projection lamp, which comprises a shell, a light-emitting module, a light-gathering module, a film module and an imaging module, wherein the light-emitting module, the light-gathering module, the film module and the imaging module are sequentially arranged in the shell along a light path;
the imaging module comprises a first imaging lens and a second imaging lens, wherein the curvature radii of the first imaging lens and the second imaging lens are reciprocal, and the conical coefficients and the lens thickness of the first imaging lens and the second imaging lens are the same;
the first imaging lens and the second imaging lens are arranged in a mirror symmetry mode on a light path.
The utility model provides an automobile projection lamp, its imaging module adopt two curvature radii each other to be reciprocal, and the gaussian structure design of the first imaging lens that cone coefficient and lens thickness are the same and second imaging lens, this first imaging lens and second imaging lens can be processed in a mould on the one hand, can save half die sinking expense down, reduction in production cost. In addition, the imaging module adopts a Gaussian structure and has a large aperture design, so that the system can obtain larger light incoming quantity, and the imaging can be brighter under the same light source. The dispersion of the Gaussian structure is small, and different wavelengths are not obviously separated, so that the dispersion is small, the uniformity of the colors of the projected patterns is ensured, red and blue edges cannot appear at the edges of the images, and the imaging quality of the automobile projection lamp is ensured.
Further, the first imaging lens and the second imaging lens are plano-convex lenses which are arranged in a mirror symmetry manner on the optical path. One surface of the first imaging lens and one surface of the second imaging lens in the imaging module are a plane and an aspheric surface, and the imaging module only has two aspheric surfaces, so that the processing cost of the imaging module can be reduced.
Further, the imaging module further comprises a diaphragm disposed between the first imaging lens and the second imaging lens; the aperture range of the diaphragm is 7-9 mm. The design has a larger aperture value to ensure the light entering amount.
Further, the F-number of the imaging module is 1.5-1.8. The design can make the imaging module obtain larger light entering quantity, and under the same light source, the imaging can be brighter.
Further, the focal length of the imaging module ranges from 14 mm to 16 mm. The projection lamp can be ensured to present clear images in the place of 2.5-3 meters.
Further, the field angle of the imaging module is 14-16 degrees. The design has a relatively large field of view and can image well in a variety of fields of view.
Further, the curvature of field of the field of view of the first lens module and the second lens module in the imaging module is less than or equal to 1mm, and the distortion is less than or equal to 2%. The field region and distortion of the imaging module can effectively ensure the imaging quality of the imaging module in the range.
Further, the light-gathering module includes a TIR lens.
Further, the light-condensing module includes a fresnel lens.
Further, the light-gathering module comprises two identical light-gathering convex lenses.
Drawings
Fig. 1 is a first example of an automotive projection lamp provided in an embodiment of the present invention;
fig. 2 is a second example of a projection lamp for an automobile according to an embodiment of the present invention;
fig. 3 is a third embodiment of an automotive projection lamp according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a gaussian structure design of an imaging module provided in an embodiment of the present invention;
fig. 5 is a schematic view of the field region and distortion of an imaging module provided in an embodiment of the present invention;
fig. 6 is a dot-column diagram of an imaging module provided in an embodiment of the present invention.
Wherein, 1, a light emitting module; 11. a substrate; 12. LED lamp beads;
2. a light condensing module; 21. a first condenser lens; 22. a second condenser lens.
3. A film module;
4. an imaging module; 41. a first imaging lens; 42. a second imaging lens.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, this example provides an automobile projection lamp, which includes a housing (not shown in the figure), and a light emitting module 1, a light condensing module 2, a film module 3 and an imaging module 4, which are sequentially disposed in the housing along an optical path;
the housing is used for installing the optical elements therein, which is well known to those skilled in the art, and no innovation is provided for improving the housing in this embodiment, and the description is omitted.
The light emitting module 1 in this example includes a substrate 11 and LED beads mounted on the substrate 11. The substrate 11 may be a printed circuit board, a flexible circuit board, an aluminum substrate, or the like.
Wherein, the light-gathering module 2 in this example comprises a TIR (Total Internal Reflection, Chinese name) lens; TIR lenses are well known to those skilled in the optical arts and employ the principle of total reflection to totally reflect light out through the controller optical path. In this example, a conventional condenser lens is changed into a TIR lens, because the TIR lens has a small volume, a smooth surface shape and a high light energy utilization ratio, the TIR lens can be used as the condenser lens to increase the imaging uniformity.
The film module 3 is a module for providing an image to be projected, and generally includes a glass film and a cover body to which the glass film is fixed on both sides. Are well known to those skilled in the art and will not be described in detail.
In order to improve the imaging quality, the imaging system of the invention is designed by adopting a gaussian structure, and specifically, the imaging module 4 of the gaussian structure comprises a first imaging lens 41 and a second imaging lens 42, wherein the two curvature radii are reciprocal, and the conical coefficients and the lens thicknesses are the same; since the first imaging lens 41 and the second imaging lens 42 are plano-convex lenses of symmetrical design. The mould can be processed in one mould, and half of the mould opening cost can be saved.
The first imaging lens 41 and the second imaging lens 42 are arranged in mirror symmetry on the optical path.
In this example, the first imaging lens 41 and the second imaging lens 42 are plano-convex lenses arranged in mirror symmetry on the optical path. In this example, the incident surface of the first imaging lens 41 is a flat surface, and the exit surface thereof is an aspherical convex surface; the incident surface of the second imaging lens 42 is an aspheric convex plane, and the exit surface thereof is a plane. One surface of the first imaging lens 41 and the second imaging lens 42 in the imaging module 4 is a plane and one aspheric surface, and only two aspheric surfaces in the imaging module 4 reduce the processing cost of the imaging module 4.
As shown in fig. 4, the imaging module 4 in this example further includes a diaphragm (not labeled) disposed between the first imaging lens 41 and the second imaging lens 42; the aperture of the diaphragm is 7-9mm, for example, the aperture diameter is 8.23mm in this example, and the design has a larger aperture value to ensure the light incoming amount. The Gaussian structure has a large-aperture design, so that the system can obtain larger near light quantity, and under the same light source, the imaging can be brighter. In the existing traditional design method, the apertures of the imaging system are all very small, the F number (expressed by F #, the calculation formula of the F number is F/d, F is a focal length, d is an entrance pupil diameter, is the reciprocal of a relative aperture, determines the image plane illumination and determines the design difficulty) is between 2.8 and 3.5, the light inlet quantity of the imaging system is limited by the small aperture, the imaging system cannot obtain enough light inlet quantity, the imaging brightness is influenced, and the imaging is dark when the projection lamp is turned on. The F number of the imaging module 4 in this example is 1.5-1.8, for example 1.6, which makes the imaging module 4 obtain a larger light input amount, and under the same light source, the imaging can be brighter.
In this example, the focal length of the imaging module 4 is in the range of 14-16mm, for example, the effective focal length is 15 mm. The projection lamp can be ensured to present clear images in the place of 2.5-3 meters.
In this example, the field angle of the imaging module 4 is 14 ° to 16 °. Specifically, the field angle is 15 ° in this example. The design has a relatively large field of view and can image well in a variety of fields of view.
In this example, as shown in the field curvature and distortion diagram of the imaging module 4 having the gaussian structure shown in fig. 5, it can be seen that the field curvatures of the fields of view of the first lens module and the second lens module in the imaging module 4 are equal to or less than 1mm, and the distortion is equal to or less than 2%. The field region and distortion thereof are within the above range, and the imaging quality of the imaging module 4 can be effectively ensured.
As shown in the dot-column diagram of fig. 6, the imaging module 4 with the gaussian structure has a small dispersion, and no significant separation occurs between different wavelengths, so that the dispersion is small, which ensures the uniformity of the color of the projected pattern, and no red or blue edge occurs at the edge of the image.
The working process is described as follows: the light emitted by the light emitting module 1 is condensed by the light condensing module 2 and then uniformly emitted to the film module 3, the projection pattern on the film module 3 is projected to the imaging module 4, and the light is projected after being amplified by the imaging module 4.
In the projection lamp for the automobile provided by the embodiment, the imaging module 4 adopts a gaussian structure design of the first imaging lens 41 and the second imaging lens 42, in which the two curvature radii are reciprocal, the conical coefficient and the lens thickness are the same, on one hand, the first imaging lens 41 and the second imaging lens 42 can be processed in one mold, so that half of the mold opening cost can be saved, and the production cost can be reduced. In addition, the imaging module 4 adopts a gaussian structure, and has a large aperture design, so that the system can obtain a larger light incoming quantity, and under the same light source, the imaging can be brighter. The dispersion of the Gaussian structure is small, and different wavelengths are not obviously separated, so that the dispersion is small, the uniformity of the colors of the projected patterns is ensured, red and blue edges cannot appear at the edges of the images, and the imaging quality of the automobile projection lamp is ensured.
Example 2
As shown in fig. 2, this embodiment provides an automobile projection lamp, which has most of the same structure as that of embodiment 1, and also includes a housing (not shown in the figure), and a light emitting module 1, a light collecting module 2 (not shown in fig. 2), a film module 3 and an imaging module 4 which are sequentially arranged in the housing along an optical path; the difference is only the difference of the light-gathering module 2, and in order to avoid the complication, the present example only makes a simple explanation of the light-gathering module 2.
The light-gathering module 2 comprises a Fresnel lens; the Fresnel lens is shown by the public and is formed by pressing an electroplating die process and a PE (polyethylene) material according to the principle of Fresnel invention of French photophysics, and a circle of concentric circles which is from small to large, is from shallow to deep and looks like sawtooth in a section are recorded on the surface of the Fresnel lens. In the embodiment, a traditional condensing lens is changed into a Fresnel lens, and the thickness of the Fresnel lens can be greatly reduced due to the unique structure of the diffraction surface, so that the Fresnel lens has a great effect on reducing the total length of the whole system.
Similarly, in the projection lamp for an automobile provided by this embodiment, the imaging module 4 adopts a gaussian structure design of the first imaging lens 41 and the second imaging lens 42, in which the two curvature radii are reciprocal, and the conic coefficient and the lens thickness are the same, so that on one hand, the first imaging lens 41 and the second imaging lens 42 can be processed in one mold, which can save half of the mold opening cost and reduce the production cost. In addition, the imaging module 4 adopts a gaussian structure, and has a large aperture design, so that the system can obtain a larger light incoming quantity, and under the same light source, the imaging can be brighter. The dispersion of the Gaussian structure is small, and different wavelengths are not obviously separated, so that the dispersion is small, the uniformity of the colors of the projected patterns is ensured, red and blue edges cannot appear at the edges of the images, and the imaging quality of the automobile projection lamp is ensured.
Example 3
As shown in fig. 3, this embodiment provides an automobile projection lamp, which has most of the same structure as that of embodiment 1, and also includes a housing (not shown in the figure), and a light emitting module 1, a light collecting module 2 (not shown in fig. 3), a film module 3 and an imaging module 4 which are sequentially arranged in the housing along an optical path; the difference is only the difference of the light-gathering module 2, and in order to avoid the complication, the present example only makes a simple explanation of the light-gathering module 2.
The light-gathering module 2 comprises two same light-gathering convex lenses; on the basis of not increasing the cost of opening the mould, the invention considers that the condenser lens can be changed into two identical convex lenses to reduce the curvature of each lens and project more uniform light beams. As shown in fig. 3, the condensing convex lens includes a first condensing lens 21 and a second condensing lens 22.
Similarly, in the projection lamp for an automobile provided by this embodiment, the imaging module 4 adopts a gaussian structure design of the first imaging lens 41 and the second imaging lens 42, in which the two curvature radii are reciprocal, and the conic coefficient and the lens thickness are the same, so that on one hand, the first imaging lens 41 and the second imaging lens 42 can be processed in one mold, which can save half of the mold opening cost and reduce the production cost. In addition, the imaging module 4 adopts a gaussian structure, and has a large aperture design, so that the system can obtain a larger light incoming quantity, and under the same light source, the imaging can be brighter. The dispersion of the Gaussian structure is small, and different wavelengths are not obviously separated, so that the dispersion is small, the uniformity of the colors of the projected patterns is ensured, red and blue edges cannot appear at the edges of the images, and the imaging quality of the automobile projection lamp is ensured.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An automobile projection lamp comprises a shell, and a light-emitting module, a light-gathering module, a film module and an imaging module which are sequentially arranged in the shell along a light path;
the imaging module comprises a first imaging lens and a second imaging lens, wherein the two curvature radii of the first imaging lens and the second imaging lens are reciprocal, and the conical coefficients and the lens thickness of the first imaging lens and the second imaging lens are the same;
the first imaging lens and the second imaging lens are arranged in a mirror symmetry mode on a light path.
2. The vehicle projection lamp of claim 1, wherein the first and second imaging lenses are plano-convex lenses arranged mirror-symmetrically on an optical path.
3. The automotive projection lamp of claim 2, wherein the imaging module further comprises a diaphragm disposed between the first imaging lens and the second imaging lens; the aperture range of the diaphragm is 7-9 mm.
4. The automotive projection lamp of claim 3, wherein the F-number of the imaging module is 1.5-1.8.
5. The automotive projection lamp of claim 1, wherein the imaging module has a focal length in the range of 14-16 mm.
6. The vehicle projection lamp of claim 1, wherein the field of view of the imaging module is 14 ° -16 °.
7. The vehicle projection lamp of claim 1, wherein the field curvature of the field of view of the first and second lens modules in the imaging module is 1mm or less and the distortion is 2% or less.
8. The automotive projection lamp of claim 1, wherein the light collection module comprises a TIR lens.
9. The automotive projection lamp of claim 1, wherein the light collection module comprises a fresnel lens.
10. The vehicle projection lamp of claim 1, wherein the light collection module comprises two identical light collection convex lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261036.XU CN210165315U (en) | 2019-08-05 | 2019-08-05 | Automobile projection lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261036.XU CN210165315U (en) | 2019-08-05 | 2019-08-05 | Automobile projection lamp |
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| CN210165315U true CN210165315U (en) | 2020-03-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021196489A1 (en) * | 2020-03-31 | 2021-10-07 | 广东烨嘉光电科技股份有限公司 | Vehicle-mounted small projection lamp system |
| CN114527619A (en) * | 2022-04-21 | 2022-05-24 | 宁波福尔达智能科技股份有限公司 | Carpet lamp and vehicle |
| CN114963112A (en) * | 2021-02-26 | 2022-08-30 | 扬明光学股份有限公司 | Car light device and projection lens for car light |
| CN115059898A (en) * | 2022-05-13 | 2022-09-16 | 北京一数科技有限公司 | Automobile projection device |
-
2019
- 2019-08-05 CN CN201921261036.XU patent/CN210165315U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021196489A1 (en) * | 2020-03-31 | 2021-10-07 | 广东烨嘉光电科技股份有限公司 | Vehicle-mounted small projection lamp system |
| US11708021B2 (en) | 2020-03-31 | 2023-07-25 | Yejia Optical Technology (Guangdong) Corporation | Small-sized vehicle-mounted projector light system |
| CN114963112A (en) * | 2021-02-26 | 2022-08-30 | 扬明光学股份有限公司 | Car light device and projection lens for car light |
| TWI794798B (en) * | 2021-02-26 | 2023-03-01 | 揚明光學股份有限公司 | Vehicle lamp device and projection lens for vehicle lamp |
| CN114527619A (en) * | 2022-04-21 | 2022-05-24 | 宁波福尔达智能科技股份有限公司 | Carpet lamp and vehicle |
| CN114527619B (en) * | 2022-04-21 | 2022-07-29 | 宁波福尔达智能科技股份有限公司 | Carpet lamp and vehicle |
| CN115059898A (en) * | 2022-05-13 | 2022-09-16 | 北京一数科技有限公司 | Automobile projection device |
| CN115059898B (en) * | 2022-05-13 | 2024-04-12 | 北京一数科技有限公司 | Automobile projection device |
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