Automobile floor lighting lamp system
By setting a non-smooth surface of a plurality of reflective structures on the cone rod side surface of the automotive floor lamp system and setting a focus structure on the exit end surface, the problems of low lighting efficiency and high production cost of the existing automotive floor lamp system are solved, and efficient and uniform lighting effects and low-cost production are achieved.
Patent Information
- Application Number
- CN202422241708.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing automotive floor lamp systems have problems such as low lighting efficiency, high power consumption, poor lighting effects and high production costs, which limit their popularity.
An automobile floor lamp system is designed, including a light source and a cone rod. The side surface of the cone rod is composed of a non-smooth surface composed of a plurality of identical reflective structures. During the transmission process, the light is reflected back and forth repeatedly through these reflective structures. The exit end surface is a focus structure to improve the uniformity and focus of the emitted light.
By improving the uniformity and focus of the emitted light, the lighting efficiency and lighting F value are improved, and the light divergence angle is reduced, thereby realizing a floor lamp system with small size, simple structure and low production cost.
Smart Images
Figure CN222992711U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of automotive lighting, and more specifically, to an automotive ground lighting system. Background Art
[0002] Currently, for some vehicles equipped with an automotive ground lighting system, when a passenger opens or closes the car door, the ground lighting can illuminate the area around the door, making it easier for the passenger to see the ground near the door, thus facilitating the passenger's getting on and off the car and improving the safety of night driving. The automotive ground lighting can also project different automotive labels to showcase the noble temperament of the automotive brand, enhance the overall image of the vehicle, and give people a feeling of being at home.
[0003] However, currently available ground lighting generally has problems such as low lighting efficiency, high power consumption, poor lighting effect, and high production cost, which limit the popularization of automotive ground lighting. Utility Model Content
[0004] This application proposes an automotive ground lighting system to improve the above defects.
[0005] Specifically, an embodiment of this application provides an automotive ground lighting system, including: a light source, a cone rod, and a film. The cone rod is disposed on the light path of the light emitted by the light source; the cone rod includes an incident end face, an exit end face, and a side surface. The light enters the cone rod through the incident end face, is transmitted in the cone rod, and exits through the exit end face and then irradiates the film. Among them, the side surface is a non-smooth surface composed of a plurality of identical reflection structures, and the light undergoes multiple back-and-forth total reflections on the plurality of reflection structures during the transmission in the cone rod; among them, the exit end face is a focusing structure.
[0006] Optionally, the distance between the incident end face and the light-emitting surface of the light source ranges from 0.2 mm to 0.6 mm.
[0007] Optionally, the diameter of the incident end face is smaller than the diameter of the exit end face. The diameter of the incident end face ranges from 1.2 mm to 2 mm, and the diameter of the exit end face is 6 mm.
[0008] Optionally, the reflection structure is a corrugated microstructure, and the exit end face is a Fresnel zone microstructure.
[0009] Optionally, the angle range of the corrugated inclined surface of each corrugated microstructure is between 25° and 50°.
[0010] Optionally, both the maximum spacing and the maximum depth of the zone rings of the Fresnel zone microstructure are less than 0.25 mm.
[0011] Optionally, the reflection structure is a prism surface, and the exit end face is a spherical convex surface.
[0012] Optionally, the number of the prism surfaces included in the side surface ranges from 7 to 12, and the radius of curvature of the spherical convex surface is 4.8 mm.
[0013] Optionally, the light source is a light-emitting diode, and the light-emitting surface size of the light source is 0.73 * 0.73 mm 2 。
[0014] Optionally, the cone rod is made of silica gel material or polymethyl methacrylate material.
[0015] Therefore, an automotive ground illumination lamp system provided by the present application includes: a light source and a cone rod, and the cone rod is disposed on the optical path of the light emitted by the light source; the cone rod includes an incident end face, an exit end face and a side surface, and the light enters the cone rod through the incident end face and exits through the exit end face after being transmitted in the cone rod; wherein, the side surface is a non-smooth surface composed of a plurality of identical reflection structures, and the light undergoes multiple back-and-forth total reflections on the plurality of reflection structures during the transmission in the cone rod; wherein, the exit end face is a focusing structure. By setting the side surface of the cone rod as a non-smooth surface with a plurality of identical reflection structures, the light entering the cone rod can be reflected back and forth and mixed under the action of the plurality of reflection structures on the side surface during the transmission process, improving the uniformity of the emitted light. Moreover, the exit end face of the cone rod is a focusing structure, which can further reduce the divergence angle of the light emitted from the exit end of the cone rod. Since the optical component of this ground illumination lamp system is only an integrally injection-molded silica gel cone rod, this system has the characteristics of small volume, simple structure and low production cost, and can enable the cone rod to have a high optical expansion amount at a relatively short length, improving the illumination uniformity and illumination F value of the light emitted by this ground illumination system.
[0016] Other features and advantages of the embodiments of the present application will be described in the subsequent description, and, in part, will become obvious from the description or will be understood by implementing the embodiments of the present application. The objectives and other advantages of the embodiments of the present application can be achieved and obtained through the structures specifically pointed out in the written description, claims, and drawings. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0018] Figure 1Shows an automotive ground lighting system proposed in an embodiment of the present application.
[0019] Figure 2 Shows a schematic structural diagram of a conical rod proposed in an embodiment of the present application.
[0020] Figure 3 Shows a schematic structural diagram of a reflection structure proposed in an embodiment of the present application.
[0021] Figure 4 Shows a uniformity distribution diagram of the light spot emitted by a conical rod shown in an embodiment of the present application.
[0022] Figure 5 Shows another uniformity distribution diagram of the light spot emitted by a conical rod shown in an embodiment of the present application.
[0023] Figure 6 Shows a schematic structural diagram of another conical rod proposed in an embodiment of the present application.
[0024] Figure 7 Shows a uniformity distribution diagram of the light spot emitted by a conical rod shown in another embodiment of the present application.
[0025] Figure 8 Shows another uniformity distribution diagram of the light spot emitted by a conical rod shown in another embodiment of the present application. Detailed implementation manners
[0026] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0027] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0028] Please refer to Figure 1 , Figure 1The figure shows a schematic structural diagram of an automotive ground lighting system proposed in an embodiment of the present application. Specifically, system 100 includes a light source 110, a tapered rod 120, and a film 130. The tapered rod 120 is disposed on the optical path of the light emitted by the light source 110. The tapered rod 120 includes an incident end face 121, an exit end face 122, and a side surface 123. Light enters the tapered rod 120 through the incident end face 121, is transmitted within the tapered rod 120, exits through the exit end face 123, and is directed towards the film 130 to form an image with uniform illumination on the film 130.
[0029] Among them, the side surface 123 is a non-smooth surface composed of a plurality of identical reflection structures. Therefore, during the process of light entering the tapered rod 120 through the incident end face 121 and being transmitted, multiple back-and-forth total reflections will occur on the plurality of reflection structures, and then reach the exit end face 122 for exit. Further, the exit end face 123 is a focusing structure. In this embodiment, by setting the side surface of the tapered rod as a non-smooth surface with a plurality of identical reflection structures, the light entering the tapered rod can be reflected back and forth and mixed under the action of the plurality of reflection structures on the side surface during the transmission process, improving the uniformity of the exit light. Moreover, the exit end face of the tapered rod is a focusing structure, which can further reduce the divergence angle of the light exiting from the exit end of the tapered rod. Thus, the tapered rod can have a high optical expansion amount at a relatively short length, improving the illumination uniformity and the illumination F-number of the light exiting from this ground lighting system.
[0030] As an implementation manner, the distance between the incident end face 121 of the tapered rod 120 and the light-emitting surface of the light source 110 ranges from 0.2 mm to 0.6 mm. Specifically, if the distance between the incident end face 121 and the light source 110 is too small, the high temperature generated when the light source 110 emits light may cause thermal deformation of the tapered rod 120, resulting in contact between the tapered rod 120 and the light source 110. If the distance between the incident end face 121 and the light source 110 is too large, the light energy collection rate of the tapered rod 120 for the light emitted by the light source 110 will be reduced. Therefore, setting the distance between the incident end face 121 and the light-emitting surface of the light source 110 to range from 0.2 mm to 0.6 mm can not only ensure that the distance between the incident end face 121 and the light source 110 is not too close to cause deformation of the tapered rod, but also ensure a high light energy collection rate of the tapered rod for the light source.
[0031] As an implementation manner, the diameter of the incident end face 121 of the tapered rod 120 is smaller than that of the exit end face 122. According to the characteristics of the tapered rod and the law of conservation of optical étendue, setting the diameter of the incident end face 121 smaller than that of the exit end face 122 can reduce the divergence angle of the light rays after passing through the tapered rod 120 and improve the focusing degree of the light rays. Exemplarily, let the diameter range of the incident end face 121 be between 1.2 mm and 2 mm, ensuring that the diameter of the incident end face 121 is not too large to dilute the optical étendue of the floor lighting system, nor too small to reduce the collection of the light energy of the light source 110; set the diameter of the exit end face 123 to 6 mm, making the diameter of the exit end face 122 larger than that of the incident end face 121, thereby reducing the divergence angle of the light rays after exiting the tapered rod 120.
[0032] As an implementation manner, the light source 110 is a light-emitting diode (LED). Further, the light source 110 can be a planar LED, and the light-emitting surface size of the light source 110 is 0.73 * 0.73 mm. 2 , using a small-sized planar LED as the light source is beneficial to reducing the volume of the floor lighting system while maintaining the optical étendue of the floor lighting system. Further, the light source 110 can also be a circular LED, and the light-emitting surface size is a small size similar to that of the planar LED. Using an LED with a circular light-emitting surface is beneficial to matching the shape of the light-emitting surface of the light source 110 with the incident end face 121 of the tapered rod, that is, making the light emitted by the light source 110 fill the incident end face 121 of the tapered rod 120, improving the optical étendue, and making the light rays incident into the tapered rod more fully homogenized. Exemplarily, the light source 110 can use a small-sized planar white LED of the model OSRAM KW CDLMM1.TK. The light source 110 emits white light with a wavelength of 400 nm to 750 nm, a luminous flux of 220 lm, and a luminous angle of 180°.
[0033] As an implementation manner, the conical rod 120 has a solid structure and is made of silica gel material or polymethyl methacrylate (PMMA) material. Further, the manufacturing material of the conical rod 120 can be determined according to the power of the light source 110. If the light source 110 used is a high-power LED, it is preferred to use silica gel material to make the conical rod 120. This is because silica gel has a high heat distortion temperature. The incident end face of the conical rod 120 made of silica gel can be closely attached to the light-emitting surface of the light source 110 with a small spacing, without worrying about heat distortion. Thus, the conical rod 120 can efficiently collect the light emitted by the light source 110. If the light source 110 used is a low-power LED, it is preferred to use polymethyl methacrylate material to make the conical rod 120. The heat distortion temperature of the PMMA material is lower than that of the silica gel material. However, since the light source 110 itself has low power and less heat generation, the conical rod 120 can still be closely attached to the light source 110 with a small spacing for efficient collection. Moreover, the cost of the PMMA material is lower than that of the silica gel material. Determining the manufacturing material of the conical rod 120 according to the power of the light source 110 can minimize the cost of the floodlight system as much as possible on the premise of ensuring the light collection rate of the conical rod.
[0034] As an implementation manner, please refer to Figure 2 , Figure 2 FIG. shows a schematic structural diagram of a conical rod proposed in an embodiment of the present application. Among them, the conical rod 200 includes an incident end face 201, an exit end face 202, and a side surface 203. The side surface 203 is a non-smooth surface composed of a plurality of identical reflection structures 204, and the exit end face 202 is a focusing structure. Further, the reflection structure 204 is a corrugated microstructure, the side surface 203 is composed of a plurality of corrugated microstructures, and the exit end face 202 is a Fresnel zone microstructure.
[0035] Specifically, the Fresnel zone microstructure is an optical structure composed of a series of equally spaced and specifically shaped microstructures (such as annular comb-shaped stripes), and parameters such as the number, width, and spacing of the zones can be adjusted as needed to achieve different optical effects. As an implementation manner, the maximum spacing of the Fresnel zone microstructure adopted by the exit end face 202 is less than 0.25 mm, and the maximum depth is also less than 0.25 mm. Among them, the maximum spacing refers to the distance between a series of specifically shaped microstructures (such as annular comb-shaped stripes) in the Fresnel zone, and the maximum depth refers to the depth difference between the wave crest and wave trough of any microstructure in the Fresnel zone. In this way, the exit end face 202 can be similar to a positive lens structure with focusing ability through the Fresnel zone microstructure, and the focal length of the positive lens effect generated by the Fresnel zone microstructure is 10 mm, which can further reduce the divergence angle of the light emitted from the conical rod 200, so that the conical rod 200 can maintain a high optical expansion amount at a shorter length.
[0036] As an implementation manner, please refer to Figure 3 , Figure 3 which shows a schematic structural diagram of a reflection structure proposed in an embodiment of the present application. The reflection structure 204 is a corrugated microstructure. Among them, the corrugated inclined surface angle range of each corrugated microstructure is between 25° and 50°, that is Figure 3 the angle θ shown is between 25° and 50°. Only a larger corrugated inclined surface angle can achieve sufficient and uniform illumination of the light by the tapered rod. However, a large angle will also increase the processing difficulty of the tapered rod. Therefore, it is set that the corrugated inclined surface angle range of each corrugated microstructure is between 25° and 50°, which ensures the light uniformity effect of the tapered rod while reducing the processing difficulty.
[0037] Therefore, after the light enters the tapered rod 200 from the incident end face 201, it will be transmitted inside the tapered rod 200, and during the transmission process, multiple reflections will occur on the reflection structure 204 on the side surface 203 of the tapered rod 200. And the reflection structure 204 is a corrugated microstructure, so that under the action of the corrugated microstructure, the light is reflected back and forth and mixed, and finally a circular light spot with high uniformity is emitted, and the light illuminance is more uniform; the exit end face 203 is a Fresnel zone microstructure, which can collimate the light and further reduce the divergence angle of the light emitted from the tapered rod 200, so that the tapered rod 203 can maintain a high optical expansion amount at a shorter length. Specifically,
[0038] Please refer to Figure 4 , Figure 4 which shows a simulation result diagram of the light spot emitted by a tapered rod shown in an embodiment of the present application. Specifically, Figure 4 what is shown is a simulation result diagram of the uniformity distribution related to the angle between the light emitted from the tapered rod and the light spot. Figure 4 In the upper left corner of , the picture is a schematic diagram of the light spot simulation formed by the light emitted from the light source after passing through the tapered rod 200. Further, a plane rectangular coordinate system is established with the center point of the light spot as the origin. The X-axis coordinate represents the distance of the point on the light spot from the center point along the X-axis, and the Y-axis coordinate represents the distance of the point on the light spot from the center point along the Y-axis. And, according to the color depth on the light spot, the corresponding light energy density can be obtained. As Figure 4 shown in the picture in the lower right corner of , the lower right corner shows the light energy density corresponding to different color depths of the light spot, and its unit is W / mm^2. Thus, the pictures shown in the upper right corner and the lower left corner of Figure 4 can be obtained, where Figure 4 the picture shown in the upper right corner is a broken line graph reflecting the change of the light energy density of the light spot along the Y-axis. Figure 4 The picture shown in the lower left corner is a line graph reflecting the change in the light energy density of the light spot along the X-axis. It can be concluded that the light energy density of the light spot fluctuates around 0.04 W / mm^2 within the range of -2 mm to 2 mm along the X-axis, and the light energy density within the range of -2 mm to 2 mm along the Y-axis also fluctuates around 0.04 W / mm^2. That is to say, a cone rod shown in this embodiment can greatly improve the uniformity of the light spot formed after the light exits, and the light energy utilization rate is as high as over 80%. The lighting uniformity under the American National Standards Institute (ANSI) is greater than 90%.
[0039] Please refer to Figure 5 , Figure 5 which shows the simulation result diagram of the light spot emitted by another cone rod shown in an embodiment of the present application. Figure 5 which shows the simulation result diagram of the uniformity distribution related to the angle between the light emitted by the cone rod and the light spot. Among them, Figure 5 the picture in the upper left corner is the simulation schematic diagram of the light spot formed after the light emitted by the light source propagates through the cone rod 200. Further, a plane rectangular coordinate system is established with the center point as the origin for the light spot diagram. The X-axis coordinate represents the divergence angle size of the point on the light spot along the X-axis from the center point, and the Y-axis coordinate represents the divergence angle size of the point on the light spot along the Y-axis from the center point. And, according to the light and dark colors on the light spot, the corresponding light energy density can be obtained, as Figure 5 shown in the picture in the lower right corner. The lower right corner shows the light energy density corresponding to the different light and dark colors of the light spot, and its unit is W / sr. Thus, the pictures shown in the upper right corner and the lower left corner as in Figure 5 can be obtained. Among them, Figure 5 the picture shown in the upper right corner is a line graph reflecting the change in the light energy density of the light spot along the Y-axis, Figure 5 and the picture shown in the lower left corner is a line graph reflecting the change in the light energy density of the light spot along the X-axis. It can be concluded that the light energy density of the light spot fluctuates around 3.5 W / sr within the range of -10° to 10° along the X-axis, and the light energy density within the range of -10° to 10° along the Y-axis also fluctuates around 3.5 W / sr. That is to say, a cone rod shown in this embodiment can greatly improve the focusing degree of the light spot formed after the light exits. According to the calculation formula of the illumination F number and the light divergence angle, the illumination F value of this floor lamp system can be deduced to be 1.9.
[0040] Therefore, an automotive ground lighting system provided by this embodiment includes a light source, a cone rod, and a film. Among them, in this embodiment, the wavy microstructure, the Fresnel zone microstructure, and the cone rod are integrated into one body, which has a small volume, a simple structure, and a low production cost. At the same time, it has high optical efficiency, high illumination uniformity, and a large illumination F-number. The specific simulation results show that the optical efficiency can reach more than 80%, the ANSI illumination uniformity is greater than 90%, and the illumination F-number can reach 1.9.
[0041] As an implementation manner, please refer to Figure 6 , Figure 6 FIG. shows a schematic structural diagram of another cone rod proposed by an embodiment of the present application. Among them, the cone rod 300 includes an incident end face 301, an exit end face 302, and a side surface 303. The side surface 303 is a non-smooth surface composed of a plurality of identical reflection structures 304, and the exit end face 302 is a focusing structure. Further, the reflection structure 304 is a prism surface, the side surface 203 is composed of a plurality of prism surfaces, and the exit end face 302 is a spherical convex surface.
[0042] Specifically, the adoption of the spherical convex surface for the exit end face 302 can be analogized to a positive lens structure with focusing ability. After the light passes through the spherical convex surface of the exit end face 302, the divergence angle is further compressed, so that the cone rod 200 can maintain high optical expansion and a small light divergence angle at a short length. As an implementation manner, the radius of curvature of the spherical convex surface is 4.8 mm.
[0043] As an implementation manner, the number range of the reflection structures 304, that is, the prism surfaces, included in the side surface 303 is between 7 and 12. Too many prism surfaces will reduce the uniformity effect of the illumination light, and too few prism surfaces will make the illumination spot tend to be a polygon or a square illumination spot. Therefore, controlling the number range of the prism surfaces between 7 and 12 ensures high uniformity of the circular spot.
[0044] Therefore, after the light enters the cone rod 300 from the incident end face 301, it will be transmitted inside the cone rod 300, and multiple reflections will occur on the reflection structure 304 of the side surface 303 of the cone rod 300 during the transmission process. The reflection structure 304 is a prism surface, and the exit end face 303 is a spherical convex surface, so that the light is reflected back and forth and mixed under the action of multiple prism surfaces, and finally a circular spot with high uniformity is emitted, and the divergence angle of the light emitted from the cone rod 300 is further reduced, so that the cone rod 303 can maintain high optical expansion at a short length. Moreover, the prism surface is a regular plane, and the surface shape of the spherical convex surface is the same as that of a traditional spherical lens, both of which are easy to process. Therefore, the production cost of the cone rod in this embodiment is relatively low.
[0045] Please refer to Figure 7 , Figure 7Shows the simulation result diagram of the light spot emitted by a conical rod shown in another embodiment of the present application. Among them, Figure 7 Shows the simulation result diagram of the uniformity distribution of the light rays emitted by the conical rod related to the light spot size. Among them, Figure 7 The picture in the upper left corner shows the schematic diagram of the light spot formed after the light rays emitted by the light source propagate through the conical rod 300. Further, a plane rectangular coordinate system is established with the center point as the origin for the light spot diagram. The X-axis coordinate represents the distance of the point on the light spot from the center point along the X-axis, and the Y-axis coordinate represents the distance of the point on the light spot from the center point along the Y-axis. And, according to the color depth of the light spot, the corresponding light energy density can be obtained, as Figure 7 Shown in the picture in the lower right corner. The lower right corner shows the light energy density corresponding to the different color depths of the light spot, and its unit is Lux. Thus, the pictures shown in Figure 7 The upper right corner and the lower left corner can be obtained. Among them, Figure 4 The picture shown in the upper right corner is a broken line graph reflecting the change of the light energy density of the light spot along the Y-axis. Figure 4 The picture shown in the lower left corner is a broken line graph reflecting the change of the light energy density of the light spot along the X-axis. It can be concluded that the light energy density of the light spot fluctuates around 6E+06 Lux within the range of -2.5 mm to 2.5 mm on the X-axis, and the light energy density within the range of -2.5 mm to 2.5 mm on the Y-axis also fluctuates at 6E+06 Lux. That is to say, a conical rod shown in this embodiment can improve the uniformity of the light spot formed after the light rays are emitted, and the light energy utilization rate is as high as more than 75%. The lighting uniformity under the American National Standards Institute (ANSI) is greater than 85%.
[0046] Please refer to Figure 8 , Figure 8 Shows the simulation result diagram of the light spot emitted by another conical rod shown in another embodiment of the present application. Figure 8 Shows the simulation result diagram of the uniformity distribution of the light rays emitted by the conical rod related to the light spot angle. Among them, Figure 8 The picture in the upper left corner shows the schematic diagram of the light spot formed after the light rays emitted by the light source propagate through the conical rod 300. Further, a plane rectangular coordinate system is established with the center point as the origin for the light spot diagram. The X-axis coordinate represents the divergence angle of the point on the light spot from the center point along the X-axis, and the Y-axis coordinate represents the divergence angle of the point on the light spot from the center point along the Y-axis. And, according to the color depth of the light spot, the corresponding light energy density can be obtained, as Figure 8 Shown in the picture in the lower right corner. The lower right corner shows the light energy density corresponding to the different color depths of the light spot, and its unit is candela. Thus, the pictures shown in Figure 8 The upper right corner and the lower left corner can be obtained. Among them, Figure 8The picture shown in the upper right corner is a broken line graph reflecting the change in the light energy density of the light spot along the Y-axis. Figure 8 The picture shown in the lower left corner is a broken line graph reflecting the change in the light energy density of the light spot along the X-axis. It can be concluded that the light energy density of the light spot fluctuates around 100 candelas within the range of -14° to 14° along the X-axis, and also fluctuates at 100 candelas within the range of -14° to 14° along the Y-axis. That is to say, a cone rod shown in this embodiment can improve the focusing degree of the light spot formed after the light is emitted. According to the calculation formula of the illumination F number and the light divergence angle, the illumination F value of this floor lamp system can be deduced to be 2.
[0047] Therefore, an automotive floor lamp system provided in this embodiment includes a light source, a cone rod, and a film. Among them, in this embodiment, the prism surface structure and the spherical convex surface are combined with the cone rod into one body, which has a small volume, a simple structure, and a low production cost. At the same time, it has high optical efficiency, high illumination uniformity, and a large illumination F number. The specific simulation results show that the optical efficiency can reach more than 75%, the ANSI illumination uniformity is greater than 85%, and the illumination F value can reach 2.
[0048] Therefore, an automotive floor lamp system provided in an embodiment of this application includes: a light source, a cone rod, and a film. The cone rod is arranged on the light path of the light emitted by the light source; the cone rod includes an incident end face, an exit end face, and a side surface. The light enters the cone rod through the incident end face and exits through the exit end face after being transmitted in the cone rod; among them, the side surface is a non-smooth surface composed of a plurality of identical reflection structures, and the light undergoes multiple back-and-forth total reflections on the plurality of reflection structures during the transmission process in the cone rod; among them, the exit end face is a focusing structure. By setting the side surface of the cone rod as a non-smooth surface with a plurality of identical reflection structures, the light entering the cone rod can be reflected back and forth and mixed under the action of the plurality of reflection structures on the side surface during the transmission process, improving the uniformity of the emitted light. Moreover, the exit end face of the cone rod is a focusing structure, which can further reduce the light divergence angle of the light emitted from the exit end of the cone rod. Thus, the cone rod can have a high optical expansion amount at a relatively short length, improving the illumination uniformity and illumination F value of the light emitted by this lighting system.
[0049] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A vehicle ground light system, characterized in that: The system comprises a light source, a cone rod and a film, wherein the cone rod is arranged on the optical path of the light emitted by the light source; The cone rod comprises an incident end face, an exit end face and a side surface, the light enters the cone rod through the incident end face, and after being transmitted in the cone rod, exits from the exit end face and is emitted toward the film; Wherein, the side surface is a non-smooth surface composed of a plurality of identical reflective structures, and the light undergoes multiple round-trip total reflections on the plurality of reflective structures during transmission in the cone rod; Wherein, the emission end surface is a focusing structure.
2. The system according to claim 1, characterized in that The distance between the incident end face and the light emitting surface of the light source ranges from 0.2 mm to 0.6 mm.
3. The system according to claim 1, characterized in that The diameter of the incident end face is smaller than the diameter of the exit end face, the diameter of the incident end face ranges from 1.2 mm to 2 mm, and the diameter of the exit end face is 6 mm.
4. The system according to claim 1, characterized in that The reflection structure is a wave-shaped microstructure, and the emission end surface is a Fresnel wave zone microstructure.
5. The system according to claim 4, characterized in that The angle of the wave slope of each of the wave microstructures is in the range of 25° to 50°.
6. The system according to claim 4, characterized in that The maximum spacing and maximum depth of the zone rings of the Fresnel zone microstructure are both less than 0.25 mm.
7. The system according to claim 1, characterized in that The reflective structure is a facet, and the emission end surface is a spherical convex surface.
8. The system according to claim 7, characterized in that The number of the facets included in the side surface ranges from 7 to 12, and the radius of curvature of the spherical convex surface is 4.8 mm.
9. The system according to claim 1, characterized in that The light source is a light emitting diode, and the light emitting surface size of the light source is 0.73*0.73mm 2 .
10. The system according to claim 1, characterized in that The cone rod is made of silicone material or polymethyl methacrylate material.