Light guide and automobile front door atmosphere lamp
By designing a light guide with a reflective plane and a light-emitting curved surface, the problem of insufficient illumination area of the ambient light guide in the front door of the car was solved, achieving uniform light diffusion and efficient lighting, thus improving the lighting effect and driving comfort.
Patent Information
- Application Number
- CN202520052982.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-09
AI Technical Summary
The existing ambient lighting guides for car front doors have insufficient illumination area width to meet the expanded demand.
Design a light guide with an incident surface, a reflecting surface, and an exiting surface. The reflecting surface has multiple reflecting parts. After light enters through the incident surface, it is reflected within the light guide and dispersed out through the exiting surface, expanding the irradiation area. The light uniformity is improved by a light homogenizing plate.
This technology enables multiple reflections of light within the light guide, expanding the width of the illumination area, improving lighting efficiency and light uniformity, reducing light loss, and enhancing driver comfort and safety.
Smart Images
Figure CN223677634U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lamp technical field especially is involved in a light guide and car front door atmosphere lamp. BACKGROUND
[0002] The light guide is a structure piece that guides the light emitted by the LED (Light Emitting Diode) to the front panel or the position needing light, and the structure piece is made of good light guide material, generally made of polycarbonate material or acrylic material. Due to the superior light guide performance of the light guide, its application in the field of lamps, signal indication and the like is very common.
[0003] The existing car front door atmosphere lamp comprises lamp beads and a light guide, the light emitted by the lamp beads has a small width of the irradiation area after the light guide, and it is necessary to expand the width of the irradiation area. UTILITY MODEL CONTENT
[0004] The utility model discloses a light guide and car front door atmosphere lamp, and aims at solving the technical problem that the width of the irradiation area of the existing light guide needs to be improved.
[0005] In a first aspect, the present application provides a light guide, the light guide is long strip, the light guide has the light entrance surface at the length direction both ends, the light guide still has the reflection plane and the light exit curve along the length direction extension, the reflection plane is equipped with along the length direction interval distribution a plurality of reflection parts, the light exit curve is connected respectively with the reflection plane in the width direction both sides in the width direction both sides;
[0006] Wherein, the light is incident to the light guide through the light entrance surface, and then is reflected to the light exit curve through the reflection part, and finally is dispersed and emitted through the light exit curve.
[0007] In one of the embodiments, the reflection part has a reflection curve surface concave towards the light exit curve.
[0008] In one of the embodiments, the reflection curve surface is a cylindrical surface, and the corresponding center axis of the cylindrical surface is parallel to the width direction and located outside the light guide.
[0009] In one of the embodiments, the distance between the adjacent two cylindrical surfaces is 1.5 times to 3 times of the diameter of the cylindrical surface.
[0010] In one of the embodiments, the size of the reflection part in the length direction is 0.5 to 0.8 of the diameter of the cylindrical surface.
[0011] In one of the embodiments, the reflection part further has a first connecting plane and a second connecting plane, and the first connecting plane and the second connecting plane are respectively spliced to two side edges of the reflection curved surface in the width direction.
[0012] In one of the embodiments, a distance between the first reflection part and the adjacent light-incident surface is 10mm-50mm.
[0013] In one of the embodiments, a distance between the last reflection part and the adjacent light-incident surface is 10mm-50mm.
[0014] In one of the embodiments, the light-incident surface is a plane, and the light-incident surface is perpendicular to the length direction.
[0015] In one of the embodiments, the light guide is integrally formed.
[0016] In one of the embodiments, the reflection plane extends along the length direction without change in size.
[0017] In one of the embodiments, the light-out curved surface extends along the length direction without change in size.
[0018] In one of the embodiments, the light-out curved surface extends along the length direction without change in size.
[0019] The light guide and the automobile front door atmosphere lamp have the following beneficial effects: light is incident into the light guide through the light-incident surfaces at two ends and propagates along the length direction, the multiple reflection parts on the reflection plane can reflect the light at the length position to the light-out curved surface, so that the light is uniformly emitted along the length direction of the light guide, the light-out curved surface is dispersedly emitted, the emission width is expanded, a wider illumination area is achieved, the technical problem that the emission width of the existing light guide needs to be improved is solved, and the light is reflected multiple times in the light guide, so that the loss of the light is reduced and the illumination efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0021] Figure 1 The structure schematic diagram of the automobile front door atmosphere lamp provided by the utility model embodiment is shown in the following figure.
[0022] Figure 2 This is a schematic diagram of the structure of the optical guide provided in an embodiment of the present utility model;
[0023] Figure 3 for Figure 2 Enlarged view of section A in the image;
[0024] Figure 4 for Figure 3 A sectional view along line BB in the middle;
[0025] Figure 5 This is the true color map of the light guide at 5mm in the Z direction provided in this embodiment;
[0026] Figure 6 This is the pseudo-color map of the light guide at 5mm in the Z direction provided in this embodiment;
[0027] Figure 7 This is a graph showing the brightness of the light guide at 5mm in the Z direction, as provided in this embodiment.
[0028] Figure 8 The mid-section pseudo-color map of the optical simulation of the light guide provided in this application at 5mm in the Z direction;
[0029] Figure 9 for Figure 8 The sampled brightness waveform in the image;
[0030] Figure 10 Z-axis cross-sectional view of the optical guide provided in this embodiment;
[0031] Figure 11 This is a brightness distribution diagram of the light guide at 2mm in the Z direction provided in this embodiment;
[0032] Figure 12 This is a brightness distribution diagram of the light guide at 5mm in the Z direction provided in this embodiment;
[0033] Figure 13 The brightness distribution diagram of the light guide at 8mm in the Z direction provided in this embodiment.
[0034] The following are the labeling elements in the figure:
[0035] X: Length direction; Y: Width direction; Z: Light emission direction;
[0036] 10. Light source; 20. Light guide;
[0037] 210. Incident surface; 220. Reflecting plane; 221. Reflecting part; 222. Reflecting surface; 223. First connecting plane; 224. Second connecting plane; 230. Exiting surface. Detailed Implementation
[0038] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.
[0039] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the appearance of the phrases "in one embodiment" or "in some embodiments" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.
[0040] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.
[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0043] Figure 1 It is shown that the present application provides a car front door atmosphere lamp. The car front door atmosphere lamp comprises two light sources 10 and any one of the following light guides 20, and the two light sources 10 are respectively arranged at both ends of the light guide 20 in the length direction X.
[0044] In one embodiment, the automobile front door atmosphere lamp further comprises a light homogenizing plate located on the side of the light guide 20 away from the reflection plane 220 of the light exit curved surface 230, so as to homogenize the light emitted by the light exit curved surface 230. The light homogenizing plate can further eliminate the non-uniformity of the light, and ensure that the light is more uniformly distributed in the entire illumination area. The light homogenizing plate can reduce bright spots and dark spots in the light, thereby effectively reducing the generation of glare and improving the comfort and safety of the driver.
[0045] In one embodiment, the light source 10 is an LED lamp bead. LED lamp beads are known for their high energy efficiency, and they can produce the required light output at a lower energy consumption compared to traditional lighting sources. For automobile front doors, the installation space is limited, and LED lamp beads are small in size, light in weight and easy to install, and are suitable for integration into automobile front doors.
[0046] Optionally, the luminous flux of the LED lamp bead is 0.3 lm-0.5 lm, which on the one hand meets the demand of creating an atmosphere in the car, and on the other hand can significantly reduce energy consumption, and the low luminous flux of the LED lamp bead makes it easier to control and guide the light, especially when used in combination with the light guide 20 and the light homogenizing plate.
[0047] For example, the luminous flux of the LED lamp bead is 0.3 lm, 0.35 lm, 0.4 lm, 0.45 lm or 0.5 lm.
[0048] Figure 2 It is shown that the present application provides a light guide 20. In combination with Figure 2 and Figure 3 , the light guide 20 is in the shape of a long strip, the light guide 20 has light entrance surfaces 210 at both ends in the length direction X, the light guide 20 also has a reflection plane 220 and a light exit curved surface 230 extending along the length direction X, the reflection plane 220 is provided with a plurality of reflection portions 221 distributed at intervals along the length direction X, and the light exit curved surface 230 is connected to both sides of the reflection plane 220 in the width direction Y. Wherein, the light is incident into the light guide 20 through the light entrance surfaces 210 at both ends, and then reflected to the light exit curved surface 230 through the reflection portions 221, and finally dispersed and emitted through the light exit curved surface 230.
[0049] Specifically, the light is incident into the interior of the light guide 20 through the light entrance surfaces 210 at both ends, and propagates along the length direction X, the plurality of reflection portions 221 on the reflection plane 220 can reflect the light at the length position to the light exit curved surface 230, so that the light is uniformly emitted along the length direction X of the light guide 20, the light exit curved surface 230 disperses and emits, expands the emission width, realizes a wider illumination area, and the light is reflected multiple times inside the light guide 20, reducing the loss of light and improving the lighting efficiency.
[0050] Figure 5A true color diagram of the optical simulation of the light guide 20 provided in the present application is shown in FIG. 6. The blue light emitted by the light source 10 is emitted from the light emitting surface 230 of the light guide 20 to the simulation effect diagram of the irradiation area, and the distance between the irradiation area and the light emitting surface 230 is 5 mm. From Figure 5 It can be seen that the blue light band formed by the irradiation area has a large width.
[0051] Figure 6 A false color diagram of the optical simulation of the light guide 20 provided in the present application is shown in FIG. 7. The distance between the irradiation area and the light emitting surface 230 is 5 mm. In order to facilitate the observation of the brightness distribution of each position of the irradiation area, the color is used to represent the brightness from black to red. From Figure 6 It can be seen that the brightness of the irradiation area is relatively high and uniform. Specifically, the light band is marked with 10 scales at equal intervals along the length direction X, wherein the scale at the starting end is 0 and the scale at the ending end is 9. In combination with Figure 7 , the average brightness at the scale 3 is 1.16668 cd / m 2 , the average brightness at the scale 4 is 1.30811 cd / m 2 , the average brightness at the scale 5 is 1.26573 cd / m 2 , the average brightness at the scale 6 is 1.27549 cd / m 2 , the average brightness at the scale 7 is 1.11563 cd / m 2 It can be seen that the brightness value of the light band is between 1.1 cd / m 2 ~1.3 cd / m 2 , the overall uniformity is 85%, the brightness is relatively high, and the brightness is uniform.
[0052] Traditionally, the width of the reflection plane 220 is 2 mm, and the width of the light band at 5 mm is less than 6 mm. Figure 8 A middle false color diagram of the optical simulation of the light guide 20 provided in the present application is shown in FIG. 8. The distance between the irradiation area and the light emitting surface 230 is 5 mm. Figure 9 A brightness waveform diagram of the position (scale 5) of the vertical white bar of Figure 8 is shown in FIG. 9. From Figure 9 It can be seen that the width of the reflection plane 220 is 2 mm, and the width of the light band at 5 mm is 9 mm, that is, the width of the light band is relatively large.
[0053] It should be noted that in combination with Figure 1 and Figure 2 , the length direction X in the present application refers to the extension direction of the light guide 20, which is not necessarily a straight line and can be a curve. Since the edge of the front door of the automobile is not a straight line, the extension direction of the light guide 20 is matched and installed on the front door of the automobile, and the length direction X is not a straight line. In combination with Figure 3 and Figure 4The width direction Y of the light guide 20 refers to a direction parallel to the reflection plane 220 in a cross section perpendicular to the current length direction X. The light exit direction Z of the light guide 20 refers to a direction perpendicular to the reflection plane 220 in a cross section perpendicular to the current length direction X. In other words, at a specific length position, the light exit direction Z is a direction perpendicular to the current reflection plane 220, and the length direction X and the width direction Y are parallel to the current reflection plane 220 and perpendicular to each other, where the length direction X is a tangent of the joint position of the current reflection plane 220 and the light exit curved surface 230.
[0054] In some embodiments, in combination with Figure 3 and Figure 4 The light exit curved surface 230 is outwardly convex to expand the exit range and thus increase the width of the light band. The design of the convex curved surface can more effectively utilize the light reflected by the reflection plane 220, reducing the loss and waste of light. Compared with the flat design, the convex curved surface can better guide the light to the area to be irradiated, thereby improving the illumination efficiency.
[0055] In one of the embodiments, in combination with Figure 4 The projection of the light exit curved surface 230 on the light exit direction Z covers the projection of the reflection plane 220 on the light exit direction Z, that is, the light reflected by the reflection plane 220 can be effectively received and emitted by the light exit curved surface 230, ensuring that the light inside the light guide 20 is utilized to the maximum extent and reducing the loss of light.
[0056] In some embodiments, the light exit curved surface 230 extends along the length direction X without changing the size, and the width of the light in the irradiation area is more uniform. The light exit curved surface 230 with uniform width makes the installation process of the light guide 20 more convenient.
[0057] In some embodiments, the light entrance surface 210 is a plane, and the light entrance surface 210 is perpendicular to the length direction X, simplifying the introduction of light. The plane can reduce the scattering and reflection of light, so that more light can be effectively guided into the light guide 20.
[0058] In some embodiments, in combination with Figure 1 and Figure 2 The distance between the first reflection part 221 and the adjacent light entrance surface 210 is 10mm-50mm. The light entering the light guide 20 through the light entrance surface 210 is not uniform, and if it quickly meets the reflection part 221 and is emitted, there is a risk of non-uniform light spot. This non-uniformity is amplified by increasing the distance between the light entrance surface 210 and the reflection part 221 to 10mm-50mm, which allows the light to be more fully mixed inside the light guide 20, thereby reducing the light intensity difference and improving the uniformity of the light spot, and the length of the light guide 20 is reasonably controllable.
[0059] Optionally, the distance between the first reflecting part 221 and the adjacent light-incident surface 210 is 20 mm, 30 mm, 40 mm, or 50 mm.
[0060] In some embodiments, in combination with Figure 1 and Figure 2 , the distance between the last reflecting part 221 and the adjacent light-incident surface 210 is 10 mm to 50 mm. If the light rays entering the light guide 20 through the light-incident surface 210 quickly encounter the reflecting part 221 and exit, there is a risk of non-uniformity of the light spot, which will be amplified. By increasing the distance between the light-incident surface 210 and the reflecting part 221 to 10 mm to 50 mm, this distance allows the light rays to mix more fully inside the light guide 20, thereby reducing the light intensity difference and improving the uniformity of the light spot, and the length of the light guide 20 is reasonably controllable.
[0061] Optionally, the distance between the last reflecting part 221 and the adjacent light-incident surface 210 is 20 mm, 30 mm, 40 mm, or 50 mm.
[0062] In some embodiments, in combination with Figure 3 and Figure 4 , the reflecting part 221 has a concave reflecting surface 222 facing the light-exit curved surface 230. The concave reflecting surface 222 can better intercept the light rays propagating along the length direction X, reducing the loss of light rays inside the light guide 20. The concave reflecting surface 222 can make the light rays uniformly reflect and diffuse along the radial direction during the reflection process, which helps to reduce the occurrence of dark areas and make the light rays in the illumination area more uniform and consistent.
[0063] In one of the embodiments, in combination with Figure 3 and Figure 4 , the reflecting surface 222 is a cylindrical surface, and the center axis corresponding to the cylindrical surface is parallel to the width direction Y and located outside the light guide 20. The radial direction of the cylindrical surface is consistent with the length direction X of the light guide 20, which can make the light rays uniformly reflect and diffuse along the radial direction (length direction X) during the reflection process, i.e., the distribution of the light rays in the illumination area will be more uniform in the length direction X, reducing the occurrence of dark areas.
[0064] In one of the embodiments, in combination with Figure 3 , the distance E between the adjacent two cylindrical surfaces is 1.5 times to 3 times the diameter D of the cylindrical surface, which helps to more uniformly distribute the light rays in the illumination area along the length direction X, improving the overall lighting effect. When the distance is too close, the light rays may overlap each other and appear bright areas; and when the distance is too far, the light rays may not reach the light-exit curved surface 230 at the middle position and appear dark areas.
[0065] Specifically, the distance between two adjacent cylindrical surfaces is 1.5 times, 2 times, 2.5 times or 3 times of the diameter of the cylindrical surface.
[0066] Optionally, the distance between two adjacent cylindrical surfaces is 2 mm, and the diameter of the cylindrical surface is 0.8 mm.
[0067] In one of the embodiments, in combination with Figure 3 and Figure 4 The size F of the reflection part 221 in the length direction X is 0.5-0.8 times of the diameter G of the cylindrical surface, which can more effectively capture and reflect light, while not blocking the light captured by the downstream reflection part 221.
[0068] In one of the embodiments, the reflection part 221 also has a first connecting plane 223 and a second connecting plane 224, which are respectively spliced to the two side edges of the reflection surface 222 in the width direction Y. The first connecting plane 223 and the second connecting plane 224 do not intercept light parallel thereto, which is conducive to the propagation of light in the length direction X to the reflection part 221 at each length position. The existence of the connecting plane makes the light keep a more stable path during reflection, reducing the possibility of light escaping or scattering, thereby improving the utilization rate of light and the lighting effect.
[0069] In some embodiments, the reflection plane 220 extends in the length direction X without changing the size, so that the light reflection in the length direction X is uniform, which is conducive to the uniform distribution of the width size of the light band in the length direction X.
[0070] In some embodiments, the light guide 20 is integrally formed, simplifying the production process, and the integrally formed light guide 20 has more uniform and stable optical performance, because the entire light guide 20 is a whole without joints or splices, reducing the loss and scattering of light during propagation. The integrally formed light guide 20 can ensure that the distribution of light in the irradiation area is more uniform, reducing the difference between dark and bright areas, and improving the comfort and visual effect of lighting.
[0071] In some embodiments, the material of the light guide 20 is PMMA (polymethyl methacrylate), so that the light guide 20 has the characteristics of high transparency, easy to machine, and high mechanical strength. The density of PMMA is relatively low, about 1.15 to 1.19 grams per cubic centimeter, which is about half of the density of glass. The mechanical strength of PMMA is higher, and the tensile and impact resistance is 7 to 18 times stronger than ordinary glass.
[0072] Figure 10 The Z-direction cross-sectional view of the optical simulation of the light guide 20 provided in the embodiment is provided. Specifically, the brightness of different light-emitting distances forms contour lines. Figure 11The brightness distribution graph of the light guide 20 provided for this embodiment at 2mm in the Z direction has an average brightness value of 1.45cd / m 2 , and the brightness distribution is uniform. Figure 12 The brightness distribution graph of the light guide 20 provided for this embodiment at 5mm in the Z direction has an average brightness value of 1.02cd / m 2 , and the brightness distribution is uniform. Figure 13 The brightness distribution graph of the light guide 20 provided for this embodiment at 8mm in the Z direction has an average brightness value of 0.24cd / m 2 , and the brightness distribution is uniform.
[0073] The above merely provides a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A light guide, characterized by: The light guide is in a strip shape, has light-in faces at both ends in a length direction, has a reflection plane extending along the length direction and a light-out curved surface, the reflection plane is provided with a plurality of reflection portions distributed along the length direction, and both sides of the light-out curved surface in a width direction are connected with both sides of the reflection plane in the width direction respectively. Wherein, light rays are incident into the light guide through the light-in faces, are reflected to the light-out curved surface through the reflection portions, and are finally dispersed and emitted through the light-out curved surface.
2. The light guide of claim 1, wherein: The reflection portion has a reflection curved surface concave towards the light-out curved surface.
3. The light guide of claim 2, wherein: The reflection curved surface is a cylindrical curved surface, and a central axis corresponding to the cylindrical curved surface is parallel to the width direction and located outside the light guide.
4. The light guide of claim 3, wherein: The distance between two adjacent cylindrical curved surfaces is 1.5 to 3 times the diameter of the cylindrical curved surface.
5. The light guide of claim 3, wherein: The size of the reflection portion in the length direction is 0.5 to 0.8 times the diameter of the cylindrical curved surface.
6. The light guide of claim 2, wherein: The reflection portion further has a first connecting plane and a second connecting plane, and the first connecting plane and the second connecting plane are respectively spliced to both side edges of the reflection curved surface in the width direction.
7. The light guide of claim 1, wherein: The distance between the first reflection portion and the adjacent light-in face is 10 to 50 mm. And / or, the distance between the last reflection portion and the adjacent light-in face is 10 to 50 mm.
8. The light guide of any of claims 1 to 7, wherein: The light-in face is a plane, and the light-in face is perpendicular to the length direction; and / or, the light guide is integrally formed.
9. The light guide of any of claims 1 to 7, wherein: The reflection plane extends along the length direction without changing in size; and / or, the light-out curved surface extends along the length direction without changing in size.
10. An automotive front door mood light characterized by: The automobile front door atmosphere lamp comprises two light sources and the light guide according to any one of claims 1 to 9, and the two light sources are respectively arranged at both ends of the light guide in the length direction.