Automobile signal lamp LED built-in lighting device
By using stepless pattern light guides and cone curve parameters adjustment in car signal lights, the scattering loss problem caused by the concentration of light energy in traditional car lights is solved, and the uniform distribution of light and the rational utilization of energy are achieved.
Patent Information
- Application Number
- CN202510955663.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-11
- Publication Date
- 2025-08-22
AI Technical Summary
In traditional car lights, the light energy of LED and internal structures is concentrated at a specific angle, resulting in light scattering loss and cannot be effectively utilized, especially in complex road conditions, where light blind spots or uneven energy distribution occurs.
The light guide without step patterns is used to adjust the light direction by changing the conical curve parameters, combining the honeycomb-shaped arc curved surface and reasonable arrangement of light sources, so as to achieve uniform distribution of light and reasonable utilization of energy.
It improves the utilization rate of light energy, reduces the blind spots of light, and achieves the uniform distribution of light under complex road conditions.
Smart Images
Figure CN120521177A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of vehicle lamps, and in particular to an LED built-in lighting device for a vehicle signal lamp. Background Art
[0002] With the growing prosperity of the automotive industry, the development of automobiles is also changing with each passing day. While maintaining the aesthetics of the shape and various performance of car lights, cost-effectiveness has become an important indicator for people to buy cars. This has extended to the car lighting industry. Under the same effect, using less cost to achieve it has become the design concept of the new era of car lights.
[0003] Traditional headlights use direct-projection LEDs and an internal structure, with a flat pattern that emits light in a single normal direction. This causes energy to be concentrated at a specific angle, and a large amount of light is scattered and lost because it is not effectively utilized. This design can only provide basic lighting through direct projection and cannot precisely control the light path. Especially in complex road conditions, it is prone to lighting blind spots or uneven energy distribution, which needs to be optimized. Summary of the Invention
[0004] In view of the above problems, the present invention proposes an LED internal lighting device for an automobile signal lamp to solve the existing shortcomings.
[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: an automotive signal light LED internal lighting device, comprising a light guide, a front surface of the light guide having a first light emitting surface, and a back surface of the light guide having a first incident surface;
[0006] A light source is disposed on the back of the light guide, the light source faces the first incident surface, and there is a gap A between the light source and the first incident surface;
[0007] The non-step pattern is laid on the first light-emitting surface and the first incident surface, and the direction of the light entering the light guide is adjusted by changing the conic curve parameters to disperse the light.
[0008] A further improvement is that: the light source includes a plurality of LED lamp bodies, and there is a gap B between two adjacent LED lamp bodies.
[0009] A further improvement is that: the interval A / interval B≥2 / 1.5.
[0010] A further improvement is that: the stepless pattern is a plurality of arcuate curved surfaces arranged in a honeycomb shape, the boundaries of the arcuate curved surfaces form a starting angle line and an ending angle line, the starting angle line forms an angle A with the normals of the first light emitting surface and the first incident surface, and the ending angle line forms an angle B with the normals of the first light emitting surface and the first incident surface;
[0011] Among them, -90°≤angle A≤90°, -90°≤angle B≤90°.
[0012] A further improvement is that the conic parameters have three adjustment modes:
[0013] Adjustment method 1: Set the conic curve parameter to C1, 0<C1<0.5;
[0014] Adjustment method 2: Set the conic curve parameter to C2, 0.5<C2<1;
[0015] Adjustment method three: Set the conic section parameter to C3, C3 = 0.5.
[0016] A further improvement is that a decorative frame for supporting the light guide is provided on the outside of the light guide.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The light guide has a step-free pattern on the light-emitting surface and the incident surface. The step-free pattern can control the dispersion of light by adjusting the parameters of the conic curve. Through reasonable arrangement of light sources, the energy distribution is made more reasonable, the light-emitting direction is adjusted, and the energy utilization rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0020] Figure 1 It is a structural diagram of the decorative frame in the present invention.
[0021] Figure 2 It is a structural diagram of the light source in the present invention.
[0022] Figure 3 It is a structural diagram of the light guide in the present invention.
[0023] Figure 4 This is a structural diagram of the first light-emitting surface in the present invention.
[0024] Figure 5 It is a structural diagram of the first incident surface in the present invention.
[0025] Figure 6 It is a structural diagram of the arc surface in the present invention.
[0026] Including: 1. Decorative frame; 2. Light source;
[0027] 3. Light guide; 31. First light emitting surface; 32. First incident surface;
[0028] 4. No step pattern; 41. Arc-shaped surface; 42. Starting angle line; 43. Ending angle line. DETAILED DESCRIPTION
[0029] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0030] according to Figures 1-6 As shown, this embodiment provides an LED internal lighting device for a car signal lamp, comprising a light guide 3, a first light emitting surface 31 being provided on the front side of the light guide 3, and a first incident surface 32 being provided on the back side of the light guide 3;
[0031] A decorative frame 1 is provided outside the light guide 3 and is used to support the light guide 3;
[0032] The light source 2 is disposed on the back of the light guide 3, and the light source 2 faces the first incident surface 32, with a gap A between the light source 2 and the first incident surface 32;
[0033] The non-step pattern 4 is laid on the first light emitting surface 31 and the first incident surface 32 , and adjusts the direction of the light entering the light guide 3 by changing the conic curve parameters, so as to disperse the light.
[0034] The first light emitting surface 31 and the first incident surface 32 of the light guide 3 have a step-free pattern 4. The step-free pattern 4 can control the dispersion of light by adjusting the conic curve parameters, making the energy distribution more reasonable, adjusting the light emitting direction, and improving energy utilization.
[0035] Specifically, the light source 2 includes a plurality of LED lamp bodies, and there is a gap B between two adjacent LED lamp bodies;
[0036] It's worth noting that Interval A / Interval B ≥ 2 / 1.5. Within this distance, the 1.5 / 2 distance constraint ensures uniform illumination of light source 2 in this solution, achieving a balance between optical uniformity, energy efficiency, and structural compactness. Exceeding this distance requires additional energy.
[0037] It is worth noting that the step-free pattern 4 is a plurality of arcuate curved surfaces 41 arranged in a honeycomb shape. The boundaries of the arcuate curved surfaces 41 form a starting angle line 42 and an ending angle line 43. The starting angle line 42 forms an angle A with the normals of the first light emitting surface 31 and the first incident surface 32. The ending angle line 43 forms an angle B with the normals of the first light emitting surface 31 and the first incident surface 32.
[0038] Among them, -90°≤angle A≤90°, -90°≤angle B≤90°.
[0039] The arc-shaped surface 41 is a non-rotationally symmetric optical surface constructed based on a conic section equation.
[0040] In this solution, conic parameters can be adjusted in three ways:
[0041] Adjustment method 1: Set the conic curve parameter to C1, 0<C1<0.5; C1 is the elliptical mode, which has the characteristic of an ellipse: "light starting from the first focus must pass through the second focus." The pattern in this mode can distribute energy more evenly.
[0042] Adjustment method 2: Set the conic section parameter to C2, where 0.5 < C2 < 1. C2 is the hyperbola mode, which has the characteristic of a hyperbola where the line extending from the first focal point passes through the second focal point after reflection. This mode provides high energy efficiency.
[0043] Adjustment method three: Set the conic curve parameter to C3, C3 = 0.5; C3 is a parabola mode, which has the characteristic of a parabola: "light emitted from the focus is parallel to the axis after reflection." The pattern in this mode can take into account both of the above characteristics.
[0044] This solution uses conic curve parameters, which control the light output direction of the light guide 3 without steps, by using the starting angle line 42 and the ending angle line 43 at the boundary of the arc surface 41, thereby bending the light toward the center. Conic curve parameters correspond to three modes: hyperbola, ellipse, and parabola. Compared with traditional circular adjustment curves, they have a stronger ability to control energy distribution and a higher ability to optimize uniformity. By adjusting the Conic curve parameters, a non-circular adjustment method, the pattern is broken up, making the energy distribution more reasonable, and achieving uniform light distribution in the upper viewing angle of 0°-20° and the inner and outer viewing angles of -60°-60°.
[0045] How this application works:
[0046] The light source 2 is facing the first light-emitting surface 31. The light emitted by the light source 2 enters the light guide 3 through the first incident surface 32, and then is emitted outward through the first incident surface 32. The first light-emitting surface 31 and the first incident surface 32 of the light guide 3 have a step-free pattern 4. The step-free pattern 4 can control the dispersion of light by adjusting the conic section parameters, making the energy distribution more reasonable, adjusting the light output direction, and improving energy utilization.
[0047] Conic parameters can be adjusted in three ways:
[0048] Adjustment method 1: Set the conic curve parameter to C1, 0<C1<0.5; C1 is the ellipse mode, which has the characteristic of the ellipse that "light starting from the first focus must pass through the second focus".
[0049] Adjustment method 2: Set the conic section parameter to C2, 0.5<C2<1; C2 is the hyperbola mode, which has the characteristic of the hyperbola that "the reverse extension line of the light starting from the first focus passes through the second focus after reflection."
[0050] Adjustment method three: Set the conic curve parameter to C3, C3 = 0.5; C3 is the parabola mode, which has the characteristic of the parabola "light emitted from the focus is parallel to the axis after reflection".
[0051] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0052] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.
Claims
1. An LED internal lighting device for a car signal lamp, comprising a light guide (3), characterized in that: The light guide (3) is provided with a first light emitting surface (31) on the front side, and a first incident surface (32) on the back side. Also includes: A light source (2) is arranged on the back of the light guide (3), the light source (2) is facing the first incident surface (32), and there is a gap A between the light source (2) and the first incident surface (32); The stepless pattern (4) is laid on the first light-emitting surface (31) and the first incident surface (32), and adjusts the direction of light entering the light guide (3) by changing the conic curve parameters, thereby dispersing the light.
2. The LED internal lighting device for a car signal lamp according to claim 1, characterized in that: The light source (2) comprises a plurality of LED lamp bodies, and a gap B is provided between two adjacent LED lamp bodies.
3. The LED internal lighting device for a car signal lamp according to claim 1, characterized in that: The interval A / the interval B is ≥ 2 / 1.
5.
4. The LED internal lighting device for a car signal lamp according to claim 1, characterized in that: The stepless pattern (4) is a plurality of arcuate curved surfaces (41) arranged in a honeycomb shape, and the boundaries of the arcuate curved surfaces (41) are formed with a starting angle line (42) and an end angle line (43), the starting angle line (42) forms an angle A with the normal line of the first light-emitting surface (31) and the first incident surface (32), and the end angle line (43) forms an angle B with the normal line of the first light-emitting surface (31) and the first incident surface (32); Among them, -90°≤angle A≤90°, -90°≤angle B≤90°.
5. The LED internal lighting device for automobile signal lights according to claim 4, characterized in that: The conic parameters have three adjustment modes: Adjustment method 1: Set the conic curve parameter to C1, 0<C1<0.5; Adjustment method 2: Set the conic curve parameter to C2, 0.5<C2<1; Adjustment method three: Set the conic section parameter to C3, C3 = 0.
5.
6. An LED internal lighting device for a vehicle signal lamp according to any one of claims 1 to 5, characterized in that: A decorative frame (1) for supporting the light guide (3) is provided on the outside of the light guide (3).