CN211203920U - Car light lens group and vehicle - Google Patents
Car light lens group and vehicle Download PDFInfo
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- CN211203920U CN211203920U CN201921953458.3U CN201921953458U CN211203920U CN 211203920 U CN211203920 U CN 211203920U CN 201921953458 U CN201921953458 U CN 201921953458U CN 211203920 U CN211203920 U CN 211203920U
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Abstract
The utility model relates to a car light lens group and vehicle, this car light lens group includes the light source, total internal reflection lens and fresnel lens, total internal reflection lens is non-rotational symmetry structure, total internal reflection lens has first focus and second focus, first focus does not coincide with the second focus, first focus coincides with fresnel lens's focus, the second focus is located between first focus and the fresnel lens, the light source sets up in total internal reflection lens, so that the light source transmission can be through total internal reflection lens and through emitting after fresnel lens collimation. Because the total internal reflection lens and the Fresnel lens are small in size and weight, the size and weight of the whole lens set can be effectively reduced, the light weight of a vehicle is facilitated, and the cost is low. In addition, the total internal reflection lens is constructed in a non-rotational symmetric structure, light rays can form oval light spots at two focal points, and a low-beam light shape with high brightness and good illumination effect can be formed after the light rays are emitted out through the Fresnel lens.
Description
Technical Field
The disclosure relates to the technical field of vehicle lighting, in particular to a vehicle lamp lens group and a vehicle.
Background
The projection type vehicle headlamp lens group is widely used due to clear cut-off line and compact structure, and mainly comprises a light source, a reflector, a baffle and a lens, wherein the reflector is generally formed by combining an ellipsoid or a variable sphere and is used for gathering light rays emitted by the light source; the baffle is used for forming a light and shade cut-off line; the lens functions to magnify the pattern of light to some extent onto the ground.
In the conventional vehicle lamp lens group, the lens is a plano-convex aspheric lens which is large in thickness, large in volume and heavy in weight and is not beneficial to light weight of a vehicle. In addition, most of the traditional reflectors are light reflecting cups, the size and the weight are large, light rays emitted by the light source cannot be sufficiently and effectively reflected due to the limitation of the size of the reflector, part of the light rays cannot be reflected by the reflector, and the light energy utilization rate is low.
SUMMERY OF THE UTILITY MODEL
The disclosed object is to provide a car lamp lens group and a car, the car lamp lens group has small volume and weight, low cost, high light energy utilization rate and good lighting effect.
In order to achieve the above object, the present disclosure provides a vehicle lamp lens group, which includes a light source, a total internal reflection lens and a fresnel lens, where the total internal reflection lens and the fresnel lens are disposed oppositely, the total internal reflection lens is a non-rotationally symmetric structure, the total internal reflection lens has a first focus and a second focus, the first focus is not overlapped with the second focus, the first focus is overlapped with the focus of the fresnel lens, the second focus is located between the first focus and the fresnel lens, and the light source is disposed in the total internal reflection lens, so that light emitted by the light source can be collected to the first focus and the second focus through the total internal reflection lens and then emitted after being collimated through the fresnel lens.
Optionally, the tir lens includes a first light transmission surface, a second light transmission surface, an inner surrounding surface and an outer surrounding surface, the inner surrounding surface is disposed around the first light transmission surface and defines a receiving space for receiving the light source together with the first light transmission surface, the outer surrounding surface is connected between the inner surrounding surface and the second light transmission surface, an optical axis of the tir lens and an optical axis of the fresnel lens are parallel to each other or perpendicular to each other, a cross-section of the first light transmission surface perpendicular to the optical axis of the tir lens is an ellipse, wherein the first light transmission surface is configured to refract a portion of the light emitted from the light source and inject the refracted portion of the light into the tir lens, the inner surrounding surface is configured to refract another portion of the light emitted from the light source and inject the refracted portion of the light into the tir lens, and the second light transmission surface is configured to refract the light in the tir lens and inject the light out of the tir lens, the outer surrounding surface is used for reflecting light rays which strike the surface of the outer surrounding surface. Optionally, an optical axis of the tir lens and an optical axis of the fresnel lens are parallel to each other, the first light transmission surface and the second light transmission surface are disposed opposite to each other along the optical axis of the tir lens, a cross-sectional area of the second light transmission surface is larger than a cross-sectional area of the first light transmission surface, and a cross-sectional area of the outer surrounding surface gradually increases from the inner surrounding surface to the second light transmission surface.
Optionally, the outer surrounding surface is a total reflection surface capable of totally reflecting light rays reaching the surface of the outer surrounding surface, a part of light rays emitted by the light source are refracted through the first light transmission surface, refracted through the second light transmission surface and then gathered to the first focus and the second focus, another part of light rays emitted by the light source are refracted through the inner surrounding surface, totally reflected through the outer surrounding surface, refracted through the second light transmission surface and then gathered to the first focus and the second focus, or; the first light transmission surface is a refraction collimation surface capable of refracting and collimating a part of light emitted by the light source, the outer surrounding surface is a total reflection collimation surface capable of totally reflecting and collimating the light which is emitted to the surface of the outer surrounding surface, the part of light emitted by the light source is firstly refracted and collimated by the first light transmission surface, then refracted by the second light transmission surface and then gathered to the first focus and the second focus, the other part of light emitted by the light source is firstly refracted by the inner surrounding surface, then totally reflected and collimated by the outer surrounding surface, and finally refracted by the second light transmission surface and gathered to the first focus and the second focus.
Optionally, the optical axis of the tir lens and the optical axis of the fresnel lens are perpendicular to each other, the outer surrounding surface includes a first outer surrounding surface and a second outer surrounding surface, the first light transmitting surface and the second outer surrounding surface are disposed opposite to each other along the optical axis of the tir lens, one side of the first outer surrounding surface is connected to the inner surrounding surface, a portion of the second outer surrounding surface is connected to the other side of the first outer surrounding surface, another portion of the second outer surrounding surface is connected to the other side of the first outer surrounding surface through the second light transmitting surface, and the cross-sectional area of the first outer surrounding surface gradually increases from the inner surrounding surface to the second outer surrounding surface.
Optionally, the first light transmitting surface is a refractive collimating surface capable of refracting and collimating a portion of the light rays emitted by the light source, the first outer surrounding surface is a total reflection collimating surface which can totally reflect and collimate the light which is emitted to the surface of the first outer surrounding surface, the second outer surrounding surface is a total reflection surface capable of totally reflecting light rays reaching the surface of the second outer surrounding surface, a part of light rays emitted by the light source are refracted and collimated through the first light transmission surface, then totally reflected through the second outer surrounding surface, finally refracted through the second light transmission surface and then gathered to the first focus and the second focus, the other part of light emitted by the light source is refracted through the inner surrounding surface firstly and then is totally reflected and collimated through the first outer surrounding surface, then reflected by the second outer surrounding surface, finally refracted by the second light transmission surface and then gathered to the first focus and the second focus.
Optionally, a plurality of second fresnel serrations are formed on the second light transmission surface.
Optionally, the light source sets up on the optical axis of total internal reflection lens, the light that the light source sent with contained angle between the optical axis of total internal reflection lens is less than first angle, through first light transmission face refraction and jet into in the total internal reflection lens, the light that the light source sent with contained angle between the optical axis of total internal reflection lens is greater than first angle and is less than the light of second angle, through in around the face refraction and jet into in the total internal reflection lens, first angle is 20-50, the second angle is 90.
Optionally, the incident surface of the fresnel lens and the exit surface of the fresnel lens are both convex towards a direction away from the total internal reflection lens, and a plurality of first fresnel sawteeth are formed on the incident surface of the fresnel lens.
Optionally, the vehicle lamp lens group further comprises a cut-off line structure, and the cut-off line structure is movably arranged at the first focus.
The present disclosure also provides a vehicle comprising the above-mentioned vehicle lamp lens group.
Through the technical scheme, the traditional reflector is replaced by the total internal reflection lens, the traditional plano-convex aspheric lens is replaced by the Fresnel lens, and the volume and the weight of the whole lens group can be effectively reduced because the total internal reflection lens and the Fresnel lens are small, so that the light weight of a vehicle is facilitated, and the cost is low. In addition, the total internal reflection lens is constructed into a non-rotational symmetric structure, the first focus and the second focus are not overlapped, light rays can form oval light spots at the two focuses, and a low-beam light shape with narrow upper part and narrow lower part and wide two sides and good illumination effect can be formed after being emitted by the Fresnel lens. In addition, the conventional plano-convex aspheric lens does not generally have a collimation effect on light rays, a large amount of light rays are lost when passing through the plano-convex aspheric lens, an obvious hot spot effect appears on the emitted light rays, and the light ray brightness at the edge of an illumination area is reduced. And light is through fresnel lens back collimation ejection in this application to can effectively increase irradiant intensity, and the illumination brightness in the edge department of illumination zone also can obtain the reinforcement, thereby reinforcing illuminating effect.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 and 2 are schematic structural views of a vehicle lamp lens group according to an embodiment of the present disclosure, in which solid lines with arrows indicate a propagation path and a propagation direction of light; and a first focal point is shown in figure 1,
the second focus is shown in fig. 2;
FIG. 3 is a schematic perspective view of a TIR lens of a vehicle lamp lens assembly according to an embodiment of the present disclosure;
FIG. 4 is a left side view of the TIR lens of the vehicle lamp lens assembly shown in FIG. 3;
FIG. 5 is a schematic perspective view of a lens set for a vehicular lamp according to an embodiment of the present disclosure, wherein solid lines with arrows indicate the propagation path and the propagation direction of light, and a first focus and a second focus are shown;
fig. 6 is a schematic structural diagram of a vehicle lamp lens group according to still another embodiment of the present disclosure, in which solid lines with arrows indicate a propagation path and a propagation direction of light, and only one focal point is illustrated in the figure, which does not represent only the one focal point, and other focal points are not illustrated;
FIG. 7 is a schematic structural diagram of a lens group for a vehicle lamp according to another embodiment of the present disclosure, in which solid lines with arrows indicate the propagation path and the propagation direction of light, and FIG. 6 also shows only one focal point;
FIG. 8 is a schematic diagram of an angle θ between a beam of light from the light source and the optical axis B of the TIR lens.
Description of the reference numerals
1 light source 2 Total internal reflection lens
21 first light-transmitting face 22 second light-transmitting face
221 second fresnel sawtooth 23 inner surrounding surface
24 outer peripheral surface 241 first outer peripheral surface
242 second outer surrounding surface 25 accommodating space
3 Fresnel lens
31 incident surface of fresnel lens
311 first Fresnel sawtooth
Output surface of 32 Fresnel lens
4 bright-dark cut-off line structure F1 first focus
Optical axis of F2 second focus B total internal reflection lens
Optical axis of C Fresnel lens
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, directional terms such as "inside and outside" are used to refer to the inside and outside of the outline of a specific structure, and arrows in fig. 1 to 3 refer to the traveling direction of light rays, unless otherwise specified. The terms "up", "down", "left" and "right" appearing hereinafter are defined based on the up, down, left and right in the normal running state of the vehicle. Also, terms such as "first" and "second" are used merely to distinguish one element from another, and have no order or importance. Furthermore, the term "non-rotationally symmetric structure" is used to mean a lens structure in which the shape of each of a plurality of cross sections made around the optical axis of the total internal reflection lens is different.
As shown in fig. 1 to 8, the present disclosure provides a vehicle lamp lens group, which may include a light source 1, a total internal reflection lens 2, and a fresnel lens 3. The total internal reflection lens 2 is used for collecting the light emitted by the light source 2 so as to effectively utilize the light; fresnel lens 3 is used for enlargiing the light type of light to a certain degree and then projects and go on the road surface etc. to realize the effect of illumination. In terms of arrangement, the tir lens 2 and the fresnel lens 3 may be disposed opposite to each other, and the tir lens 3 may be configured as a non-rotationally symmetric structure, and the meaning of the non-rotationally symmetric structure may be referred to above. The total internal reflection lens 3 may have a first focus F1 and a second focus F2, the first focus F1 may not coincide with the second focus F2, the first focus F1 may coincide with the focus of the fresnel lens 3, and the second focus F2 may be located between the first focus F1 and the fresnel lens 3. The light source 1 can be arranged in the total internal reflection lens 2, so that on one hand, the light source 1 can be effectively protected; on the other hand, the light emitted from the light source 1 can be collected to the first focal point F1 and the second focal point F2 by the total internal reflection lens 2, and collimated by the fresnel lens 3 (so that the light beams are parallel to each other) and then emitted.
The light source 1 is used to provide illumination light, and the light source may be a light emitting diode, a halogen lamp, an L ED lamp or other suitable light emitting components, and the specific type of the light source is not limited herein.
Here, it should be noted that the above and below mentioned "total internal reflection lens" is also called TIR lens, and the principle is the total reflection principle of light to improve the utilization rate of light energy, and the light is collected and processed. According to the light energy distribution characteristics of the light source 1, discrete points on the profile curves of the refraction surface and the reflection surface of the total internal reflection lens (TIR) can be obtained by controlling the light path, a spline curve is obtained by interpolation, and a model of the total internal reflection lens (TIR) is obtained by rotating 360 degrees. In one embodiment, Tracepro software can be used to trace light rays passing through a total internal reflection lens (TIR), the lens structure is optimized according to the requirement of light energy utilization rate, the light energy utilization rate is ensured, and the size of the lens is relatively small so as to meet the requirements of miniaturization and light weight. In addition, the fresnel lens mentioned above and below is also called a screw lens, and is mostly a sheet formed by injecting and pressing polyolefin materials and also made of glass, one surface of the lens is a smooth surface, and concentric circles or strip-shaped fresnel saw teeth from small to large are recorded on the other surface of the lens, and the arrangement of the strip-shaped fresnel saw teeth is designed according to the requirements of light interference and interference, relative sensitivity and receiving angle.
Through the technical scheme, this disclosure has adopted total internal reflection lens 2 to replace traditional reflector, has adopted fresnel lens 3 to replace traditional plano-convex aspheric lens, because total internal reflection lens 2 and fresnel lens 3 volume and weight are all less, can alleviate the volume and the weight of holistic lens group effectively, do benefit to the lightweight of vehicle, and the cost is also comparatively cheap. In addition, the TIR lens 2 may be configured as a non-rotationally symmetric structure, and the first focal point F1 and the second focal point F2 may not coincide. In this embodiment, referring to fig. 5, the first focal point F1 is a focal point of the tir lens 2 in the vertical direction, the second focal point F2 is a focal point of the tir lens 2 in the horizontal direction, both of which may be on the optical axis C of the fresnel lens 3, and the light rays can form an elliptical light spot at the first focal point F1 and the second focal point F2, and can form a low beam light shape with narrow top and bottom and wide sides after being emitted through the fresnel lens 3. In addition, the conventional plano-convex aspheric lens does not generally have a collimation effect on light rays, a large amount of light rays are lost when passing through the plano-convex aspheric lens, an obvious hot spot effect appears on the emitted light rays, and the light ray brightness at the edge of an illumination area is reduced. And light jets out through 3 back collimates of fresnel lens in this application to can effectively increase illumination intensity, and the illumination brightness in the edge department of illumination zone also can obtain the reinforcement, thereby reinforcing illuminating effect.
Alternatively, the distance between the second focal point F2 and the first focal point F1 may be 3mm to 10mm by providing the shape and structure of the total internal reflection lens 2.
Alternatively, the exit surface 32 of the fresnel lens 3 may be a smooth convex aspheric surface, and the rise expression of the exit surface 32 is:
the entrance surface 31 of the fresnel lens 3 is formed as a sawtooth surface as described above, the rise of the entrance surface 31 is determined by the base and the first fresnel sawtooth 311, and the rise of the entrance surface 31 is expressed as: z ═ Zs+Zf
In order to further reduce the volume and weight of the Fresnel lens 3, the radius of curvature r of the base surface of the incident surface 31sMay be larger than the radius of curvature r of the exit surface 32; in order to further improve the utilization efficiency of the light energy, the number of the first fresnel serrations 31 on the incident surface 31 may be more than 20.
As shown in fig. 1, 2, 3 and 5, the tir lens 2 may include a first light transmission surface 21, a second light transmission surface 22, an inner surrounding surface 23 and an outer surrounding surface 24, the inner surrounding surface 23 may be disposed around the first light transmission surface 21 and define, together with the first light transmission surface 21, an accommodating space 25 for accommodating the light source 1, the accommodating space 25 may be configured as a cylindrical chamber structure, and the light source 1 may be fixedly disposed in the chamber, so as to save the arrangement space of the light source 1 and provide effective protection for the light source 1. The outer surrounding surface 24 may be connected between the inner surrounding surface 23 and the second light-transmitting surface 22, and the optical axis B of the tir lens 2 may be parallel or perpendicular to the optical axis C of the fresnel lens 3.
One difference from the prior art is that, referring to fig. 4, a cross section of the first light transmission surface 21 perpendicular to the optical axis B of the tir lens 2 may be an ellipse, and the elliptical structure is a specific structural expression form of the above "non-rotational symmetric structure", which is beneficial to forming a low beam light shape with narrow top and bottom, wide left and right, and strong brightness and good illumination effect. The cross-sectional shape perpendicular to the optical axis B of the tir lens 2 is also not specifically limited by this disclosure.
Wherein the first light-transmitting surface 21 may be used to refract a portion of the light emitted from the light source 1 and enter the tir lens 2, and the light in the tir lens 2 finally passes through the refraction of the second light-transmitting surface 22 and exits the tir lens 2. The inner surrounding surface 23 may be adapted to refract and inject another portion of the light rays emitted by the light source 1 into the tir lens 2 and further to an inner surface of the outer surrounding surface 24, which may reflect the light rays, and the light rays reflected by the inner surface are directed to the second light transmitting surface 22 and refracted by the second light transmitting surface 22 and exit the tir lens 2. The tir lens 2 can divide the light emitted from the light source 1 into two parts through the first light transmission surface 21 and the inner surrounding surface 23, so that the light emitted from the light source 1 is refracted and reflected inside the tir lens 2, and finally exits the tir lens 2 through the second light transmission surface 22, and is focused to the first focus F1 and the second focus F2. Because the light rays emitted by the light source 1 can all enter the total internal reflection lens 2, the utilization rate of the light rays can be effectively improved, and the display brightness of the light rays is further improved.
Further, as shown in fig. 1 and 2, the optical axis B of the tir lens 2 and the optical axis C of the fresnel lens 3 may be parallel to each other, for example, the optical axis B and the optical axis C may be in a collinear position, that is, the optical axis B may coincide with the optical axis C, and both the first focal point F1 and the second focal point F2 may be located on the optical axis B and the optical axis C. The first light-transmitting surface 21 and the second light-transmitting surface 22 may be disposed opposite to each other along the optical axis B of the tir lens 2, and the cross-sectional area of the second light-transmitting surface 22 may be larger than that of the first light-transmitting surface 21, so as to more effectively amplify the light pattern through the large-area second light-transmitting surface 22. The cross-sectional area of the outer surrounding surface 24 may increase gradually from the inner surrounding surface 23 to the second light transmitting surface 22 to effect the concentration of light rays of different incident angles impinging on the outer surrounding surface 24.
As shown in fig. 1, in an embodiment provided by the present disclosure, the peripheral surrounding surface 24 may be a total reflection surface capable of totally reflecting light rays incident on the surface thereof, and a part of light rays emitted by the light source 1 may be refracted through the first light transmission surface 21, refracted through the second light transmission surface 22, focused to the first focal point F1 and the second focal point F2, and collimated through the fresnel lens 3 and then emitted. Another part of the light emitted by the light source 1 may be refracted by the inner surrounding surface 23, totally reflected by the outer surrounding surface 24, refracted by the second light transmitting surface 22, collected to the first focal point F1 and the second focal point F2, collimated by the fresnel lens 3, and then emitted. The light emitted by the light source 1 can be effectively refracted and totally reflected by the first light transmission surface 21 and the peripheral surrounding surface 24, so that the light emitted by the light source 1 can be effectively collected, and the light energy utilization rate of the total internal reflection lens 2 is improved.
In another embodiment provided by the present disclosure, as shown in fig. 6 (the second focal point F2 is not shown), the first light-transmitting surface 21 may be convex toward the light source 1, and the outer peripheral surface 24 may be an outer convex arc surface, which may be convex outward to realize the effect of focusing light rays at different incident angles. A part of the light emitted from the light source 1 may be refracted and collimated by the first light transmission surface 21, refracted by the second light transmission surface 22, then focused to the first focus F1, and then collimated by the fresnel lens 3 and then emitted. Another part of the light emitted from the light source 1 may be refracted by the inner surrounding surface 23, totally reflected and collimated by the outer surrounding surface 24, refracted by the second light transmission surface 22, collected to the first focal point F1, and finally collimated by the fresnel lens 3. By setting the first light transmission surface 21 as a refractive collimating surface and the peripheral winding surface 24 as a total reflection collimating surface, light can be efficiently collected, thereby increasing the display brightness of the light and enhancing the illumination effect.
As shown in fig. 7 (the second focal point F2 is not shown), in yet another embodiment provided by the present disclosure, the optical axis B of the tir lens 2 may be perpendicular to the optical axis C of the fresnel lens 3, and the first focal point F1 of the tir lens 2 and the focal point of the fresnel lens 3 may coincide and may be located on a straight line where the optical axis C is located. The outer surrounding surface 24 may include a first outer surrounding surface 241 and a second outer surrounding surface 242, the first light-transmitting surface 21 and the second outer surrounding surface 242 may be disposed opposite to each other along the optical axis B of the tir lens 2, one side of the first outer surrounding surface 241 may be connected to the inner surrounding surface 23, a portion of the second outer surrounding surface 242 may be connected to the other side of the first outer surrounding surface 241, another portion of the second outer surrounding surface 242 may be connected to the other side of the first outer surrounding surface 241 through the second light-transmitting surface 22, and a cross-sectional area of the first outer surrounding surface 241 gradually increases from the inner surrounding surface 21 to the second outer surrounding surface 242. In this embodiment, the optical axis B of the tir lens 2 and the optical axis C of the fresnel lens 3 are perpendicular to each other, which can effectively reduce the length of the lens group when the lens group is arranged, and in addition, in order to meet the path transmission requirement of the light, the outer surrounding surface 24 is further provided as the first outer surrounding surface 241 and the second outer surrounding surface 242, so that it is possible to condense the light to the first focal point F1.
Further, as shown in fig. 7, the first light-transmitting surface 21 may be a refractive collimating surface capable of refracting and collimating a part of the light emitted from the light source 1, the first outer surrounding surface 241 may be a total reflection collimating surface capable of totally reflecting and collimating the light incident to the surface thereof, and the second outer surrounding surface 242 may be a total reflection surface capable of totally reflecting the light incident to the surface thereof. The first light transmission surface 21 can totally reflect and collimate the large-angle light emitted from the light source 1, (the total reflection is that when the light enters a low refractive index medium (air) from a high refractive index medium, the light with an incident angle larger than a critical angle is not refracted and reflected), and the second outer surrounding surface 242 is a parabolic reflecting surface (coated with a reflecting material, reflecting all the light), and can reflect the parallel light to the focus thereof.
A part of the light emitted from the light source 1 may be refracted and collimated by the first light-transmitting surface 21, reflected by the second outer surrounding surface 242, refracted by the second light-transmitting surface 22, collected to the first focal point F1, and collimated by the fresnel lens 3. Another part of the light emitted from the light source 1 may be refracted by the inner surrounding surface 23, totally reflected and collimated by the first outer surrounding surface 241, totally reflected by the second outer surrounding surface 242, refracted by the second light transmitting surface 22, collected to the first focus F1, and collimated by the fresnel lens 3. By setting the first light transmission surface 21 as a refractive collimating surface and the first outer surrounding surface 241 as a total reflection collimating surface, light can be effectively collected, thereby increasing the display brightness of the light and enhancing the illumination effect. In addition, the path of the light traveling along the optical axis B can be changed by the second outer surrounding surface 242 to focus the light to the first focal point F1 on the optical axis C, and in an alternative embodiment, the inner surface of the second outer surrounding surface 242 can be coated with a reflective material to effectively reflect the light.
Alternatively, in the above embodiment, the first light-transmitting surface 21 may be configured to protrude toward the light source 1, and the first outer surrounding surface 241 may be configured to be an outer convex curved surface to satisfy the surface type requirement required for light transmission.
Alternatively, as shown in fig. 2, a plurality of second fresnel saw teeth 221 may be formed on the second light transmission surface 22, and the second fresnel saw teeth 221 may be formed in a ring-shaped concentric circle structure, or a plurality of saw teeth arranged at intervals, which is not limited by the present disclosure. Through setting up second fresnel sawtooth 221, can also improve this total internal reflection lens 2's spotlight efficiency when can effectively reduce total internal reflection lens 2's volume and quality, improve light energy utilization rate and grading performance.
In addition, referring to fig. 8, the light source 1 may be disposed on the optical axis B of the tir lens 2, light rays emitted from the light source 1 and having an angle θ smaller than a first angle with the optical axis B of the tir lens 2 are refracted through the first light-transmitting surface 21 and incident into the tir lens 2, light rays emitted from the light source 1 and having an angle θ larger than the first angle and smaller than a second angle with the optical axis B of the tir lens 2 are refracted through the inner surrounding surface 23 and incident into the tir lens 2, the first angle is 20 ° to 50 °, and the second angle is 90 °. In this way, the tir lens 2 can be ensured to effectively condense the light rays emitted from the light source 1 at various angles.
Alternatively, as shown in fig. 1, both the incident surface 31 of the fresnel lens 3 and the emitting surface 32 of the fresnel lens 3 may be convex in a direction away from the total internal reflection lens 2, the emitting surface 32 of the fresnel lens 3 may be a smooth curved surface, which is attractive in appearance and capable of improving light distribution performance, and the incident surface 31 of the fresnel lens 3 is formed with a plurality of first fresnel serrations 311, that is, the incident surface 31 of the fresnel lens 3 may be formed as a serrated surface, thereby improving light utilization rate.
In one embodiment provided by the present disclosure, as shown in fig. 1, 6 and 7, the vehicle lamp lens group may further include a cut-off line structure 4, the cut-off line structure 4 is used to form a cut-off line when the vehicle is in a use state of the low beam, a high level of the cut-off line means a distance between the low beam and a road surface, the cut-off line is too high, which easily causes an oncoming vehicle or a pedestrian to feel dazzling, and the cut-off line is too low, which prevents a driver from seeing the distance in front of the vehicle. Therefore, the height of the cutoff line is very important for driving safety and driving experience. In an alternative embodiment, the cutoff line structure 4 is movably disposed at the first focal point F1 in a direction perpendicular to the optical axis C of the fresnel lens 3, and the cutoff line structure 4 can effectively adjust the height of the cutoff line by moving in the direction, so as to provide a safe and stable lighting requirement. Alternatively, the cutoff structure 4 may be a diaphragm or baffle structure, which is not limited by the present disclosure.
The present disclosure also provides a vehicle including the above-mentioned lamp lens group.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (11)
1. A vehicle light lens group, characterized in that it comprises a light source (1), a total internal reflection lens (2) and a Fresnel lens (3), said total internal reflection lens (2) and said Fresnel lens (3) being disposed opposite to each other, said total internal reflection lens (3) being of a non-rotationally symmetric structure, said total internal reflection lens (3) having a first focus (F1) and a second focus (F2), said first focus (F1) being non-coincident with said second focus (F2), said first focus (F1) being coincident with the focus of said Fresnel lens (3), said second focus (F2) being located between said first focus (F1) and said Fresnel lens (3), said light source (1) being disposed within said total internal reflection lens (2) so that the light rays emitted by said light source (1) can be concentrated by said total internal reflection lens (2) to a first focus (F1) and a second focus (F2), and is emitted after being collimated by the Fresnel lens (3).
2. A vehicle lamp lens group according to claim 1, characterized in that the total internal reflection lens (2) comprises a first light transmitting face (21), a second light transmitting face (22), an inner surrounding face (23) and an outer surrounding face (24), the inner surrounding face (23) being arranged around the first light transmitting face (21), and defines, together with the first light-transmitting face (21), an accommodation space (25) for accommodating the light source (1), the outer surrounding surface (24) is connected between the inner surrounding surface (23) and the second light transmitting surface (22), the optical axis (B) of the total internal reflection lens (2) and the optical axis (C) of the Fresnel lens (3) are parallel or perpendicular to each other, the cross-section of the first light-transmitting face (21) perpendicular to the optical axis (B) of the total internal reflection lens (2) is elliptical,
the first light transmission surface (21) is used for refracting a part of light rays emitted by the light source (1) and emitting the light rays into the total internal reflection lens (2), the inner surrounding surface (23) is used for refracting another part of light rays emitted by the light source (1) and emitting the light rays into the total internal reflection lens (2), the second light transmission surface (22) is used for refracting light rays in the total internal reflection lens (2) and emitting the light rays out of the total internal reflection lens (2), and the outer surrounding surface (24) is used for reflecting the light rays emitted to the surface of the outer surrounding surface.
3. A vehicle lamp lens group according to claim 2, wherein the optical axis (B) of the tir lens (2) and the optical axis (C) of the fresnel lens (3) are parallel to each other, the first light transmission surface (21) and the second light transmission surface (22) are disposed opposite to each other along the optical axis (B) of the tir lens (2), the cross-sectional area of the second light transmission surface (22) is larger than that of the first light transmission surface (21), and the cross-sectional area of the outer surrounding surface (24) is gradually increased from the inner surrounding surface (23) to the second light transmission surface (22).
4. A vehicle lamp lens group according to claim 3, wherein the outer surrounding surface (24) is a total reflection surface capable of totally reflecting light rays incident on the surface thereof, a part of light rays emitted from the light source (1) is refracted through the first light transmission surface (21), refracted through the second light transmission surface (22) and then focused to the first focus (F1) and the second focus (F2), another part of light rays emitted from the light source (1) is refracted through the inner surrounding surface (23), totally reflected through the outer surrounding surface (24), refracted through the second light transmission surface (22) and focused to the first focus (F1) and the second focus (F2), or;
the first light transmission surface (21) is a refraction collimation surface capable of refracting and collimating a part of light emitted by the light source (1), the outer surrounding surface (24) is a total reflection collimation surface capable of totally reflecting and collimating the light emitted to the surface of the outer surrounding surface, a part of the light emitted by the light source (1) is firstly refracted and collimated by the first light transmission surface (21), then refracted by the second light transmission surface (22) and then gathered to the first focus (F1) and the second focus (F2), the other part of the light emitted by the light source (1) is firstly refracted by the inner surrounding surface (23), then totally reflected and collimated by the outer surrounding surface (24), and finally refracted by the second light transmission surface (22) and gathered to the first focus (F1) and the second focus (F2).
5. A vehicle lamp lens group according to claim 2, wherein the optical axis (B) of the total internal reflection lens (2) and the optical axis (C) of the fresnel lens (3) are perpendicular to each other, the outer surrounding surface (24) comprises a first outer surrounding surface (241) and a second outer surrounding surface (242), the first light transmitting surface (21) and the second outer surrounding surface (242) are disposed opposite to each other along the optical axis (B) of the total internal reflection lens (2), one side of the first outer surrounding surface (241) is connected to the inner surrounding surface (23), a part of the second outer surrounding surface (242) is connected to the other side of the first outer surrounding surface (241), the other part of the second outer surrounding surface (242) is connected to the other side of the first outer surrounding surface (241) through the second light transmitting surface (22), and the cross-sectional area of the first outer surrounding surface (241) is from the inner surrounding surface (23) to the second outer surrounding surface (242) The direction gradually increases.
6. The vehicle lamp lens group according to claim 5, wherein the first light transmitting surface (21) is a refraction collimating surface capable of refracting and collimating a portion of the light emitted from the light source (1), the first outer surrounding surface (241) is a total reflection collimating surface capable of totally reflecting and collimating the light incident on its surface, the second outer surrounding surface (242) is a total reflection surface capable of totally reflecting the light incident on its surface, a portion of the light emitted from the light source (1) is refracted and collimated by the first light transmitting surface (21), totally reflected by the second outer surrounding surface (242), refracted by the second light transmitting surface (22) and focused to the first focus (F1) and the second focus (F2), and another portion of the light emitted from the light source (1) is refracted by the inner surrounding surface (23) first, then totally reflected and collimated by the first outer surrounding surface (241), then reflected by the second outer surrounding surface (242), and finally refracted by the second light transmission surface (22) and then gathered to the first focus (F1) and the second focus (F2).
7. The vehicle lamp lens group according to claim 2, wherein a plurality of second fresnel serrations (221) are formed on the second light transmission surface (22).
8. The vehicle lamp lens group according to any one of claims 2-7, wherein the light source (1) is disposed on the optical axis (B) of the TIR lens (2), the light rays emitted by the light source (1) and having an included angle (θ) with the optical axis (B) of the TIR lens (2) smaller than a first angle are refracted by the first light-transmitting surface (21) and incident into the TIR lens (2), the light rays emitted by the light source (1) and having an included angle (θ) with the optical axis of the TIR lens (2) larger than the first angle and smaller than a second angle are refracted by the inner surrounding surface (23) and incident into the TIR lens (2), the first angle is 20 ° -50 °, and the second angle is 90 °.
9. A vehicle lamp lens group according to claim 1, wherein the incident surface (31) of the Fresnel lens (3) and the exit surface (32) of the Fresnel lens (3) are both convex toward a direction away from the total internal reflection lens (2), and the incident surface (31) of the Fresnel lens (3) is formed with a plurality of first Fresnel saw-teeth (311).
10. A vehicle lamp lens group according to any one of claims 1-7 or 9, characterized in that it further comprises a cut-off line structure (4), said cut-off line structure (4) being movably arranged at said first focus (F1).
11. A vehicle comprising a vehicle light lens assembly according to any of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953458.3U CN211203920U (en) | 2019-11-12 | 2019-11-12 | Car light lens group and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921953458.3U CN211203920U (en) | 2019-11-12 | 2019-11-12 | Car light lens group and vehicle |
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| Publication Number | Publication Date |
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| CN211203920U true CN211203920U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921953458.3U Active CN211203920U (en) | 2019-11-12 | 2019-11-12 | Car light lens group and vehicle |
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| CN (1) | CN211203920U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432132A (en) * | 2019-08-26 | 2021-03-02 | 比亚迪股份有限公司 | Integrated lens, lighting module and vehicle |
| CN117685528A (en) * | 2024-02-02 | 2024-03-12 | 浙江嘀视科技有限公司 | Lighting module, car light and vehicle with improved light spot yellowing |
-
2019
- 2019-11-12 CN CN201921953458.3U patent/CN211203920U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432132A (en) * | 2019-08-26 | 2021-03-02 | 比亚迪股份有限公司 | Integrated lens, lighting module and vehicle |
| CN117685528A (en) * | 2024-02-02 | 2024-03-12 | 浙江嘀视科技有限公司 | Lighting module, car light and vehicle with improved light spot yellowing |
| CN117685528B (en) * | 2024-02-02 | 2024-04-16 | 浙江嘀视科技有限公司 | Lighting module, car light and vehicle with improved light spot yellowing |
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