Illuminating device capable of stably realizing low beam III area of automobile

Abstract

The invention relates to automobile lighting, in particular to a lighting device capable of stably achieving an automobile low beam III area, which comprises a light source, a condenser assembly and a light source driving system, the light source and the condenser assembly are fixedly mounted on a radiator, and a circuit board attached to the radiator is arranged among the light source, the condenser assembly and the radiator. A lens support is fixedly installed at the front end of the light source and condenser assembly, and a lens is installed at the front end of the lens support. The light source and condenser assembly comprises a low-beam light source and a low-beam condenser assembly which are used for irradiating a low-beam I area, a low-beam II area and a low-beam IV area, and a light supplementing light source and a light supplementing condenser assembly which are used for irradiating a low-beam III area, and the light source driving system conducts independent current adjustment on the light supplementing light source in the light supplementing light source and the light supplementing condenser assembly so as to adjust the illuminance of the low-beam III area. According to the technical scheme provided by the invention, the defects that the illuminance of the low-beam III area cannot be accurately controlled and the device cannot be suitable for headlamps with different shapes can be effectively overcome.

Description

Technical Field

[0001] The invention relates to automobile lighting, and in particular to a lighting device for stably realizing automobile low beam zone III. Background Art

[0002] The current relevant low beam regulations require that the illumination value at any point in the low beam III zone should not exceed 0.7lx. In particular, Fig.12 As shown in the figure, the illumination value at the test point B50L (L1500mm, U250mm) is required to be no more than 0.4lx, and the illumination value at the nearby test point P8 (L1750mm, V0) is required to be no less than 0.2lx. The angle between the two test points relative to the reference center point is only 0.892°, and the distance between them at the 25-meter screen is only 353.553mm. Therefore, a smaller illumination range (0.2lx~0.4lx) is required between the relatively close test points B50L and P8, which is a difficulty in traditional low beam design.

[0003] The conventional solution is to add fill light patterns to the local area of ​​the module lens, such as Fig.13 As shown, this technical solution mainly has the following disadvantages:

[0004] 1) The requirements for processing accuracy and assembly tolerance are high, and it is often impossible to meet the relevant low beam regulations at one time. It is necessary to modify the mold and debug it many times, which takes a lot of time and cost;

[0005] 2) Due to the high sensitivity to assembly tolerances, product consistency is poor and there are differences between different batches of products;

[0006] 3) It is difficult to meet users’ high requirements for appearance, as the lens appearance is not a complete curved surface;

[0007] 4) It is not suitable for headlamps of different shapes, and the mold needs to be repeatedly modified and debugged, which is very troublesome. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] In view of the above-mentioned shortcomings of the prior art, the present invention provides a lighting device for stably realizing the low beam zone III of an automobile, which can effectively overcome the defects of the prior art that the illumination of the low beam zone III cannot be accurately controlled and cannot be applied to headlamps of different shapes.

[0010] (II) Technical solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0012] A lighting device for stably realizing low beam zone III of an automobile comprises a light source and a condenser assembly, and a light source driving system, wherein the light source and the condenser assembly are fixedly mounted on a radiator, a circuit board attached to the radiator is arranged between the light source and the condenser assembly and the radiator, a lens bracket is fixedly mounted at the front end of the light source and the condenser assembly, and a lens is mounted at the front end of the lens bracket;

[0013] The light source and condenser assembly include a low beam light source and a low beam condenser assembly for illuminating low beam zones I, II, and IV, and a fill light source and a fill light condenser assembly for illuminating low beam zone III. The light source driving system adjusts the illumination of low beam zone III by individually adjusting the current of the fill light source and the fill light source in the fill light condenser assembly.

[0014] Preferably, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly, the fill light source and the fill light source in the fill light concentrator assembly, the low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through the fill light DC / DC constant current driving module.

[0015] Preferably, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly, the fill light source and the fill light source in the fill light concentrator assembly, the low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light DC / DC constant voltage driving module.

[0016] Preferably, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly, the fill light source and the fill light source in the fill light concentrator assembly, the low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light linear constant current driving module.

[0017] Preferably, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly, the fill light source and the fill light source in the fill light concentrator assembly, the low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light DC / DC constant voltage driving module and a fill light linear constant current driving module.

[0018] Preferably, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly, the fill-beam light source and the fill-beam light source in the fill-beam concentrator assembly, and the low-beam power supply respectively powers the low-beam light source and the fill-beam light source through a low-beam DC / DC constant current driving module and a constant current shunt circuit.

[0019] Preferably, the light source and concentrator assembly also includes a high-beam light source and a high-beam concentrator assembly, and the light source driving system also includes a high-beam power supply for powering the high-beam light source and the high-beam concentrator assembly, and the high-beam power supply powers the high-beam power supply via a high-beam DC / DC constant current driving module.

[0020] Preferably, it also includes a light shielding sheet, which is installed between the low-beam light source and the low-beam condenser assembly, and the fill-light light source and the fill-light condenser assembly through a slot relatively opened on the inner wall of the side of the lens bracket.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the lighting device for stably realizing the low beam zone III of an automobile provided by the present invention has the following beneficial effects:

[0023] 1) The current of the fill light source can be adjusted individually through the light source driving system to accurately control the illumination of the low beam zone III, and the circuit implementation of the light source driving system is diverse and has a wide range of options, so that the illumination of the low beam zone III can be easily adjusted;

[0024] 2) It does not require high processing accuracy and assembly tolerance, can reduce the number of mold modifications and debugging, save time and cost, and can be applied to headlamps of different shapes;

[0025] 3) It can simultaneously fill in the low beam cut-off line, which is conducive to the illuminance gradient range at the low beam cut-off line meeting the specified requirements;

[0026] 4) The lens does not need to be equipped with an additional fill-in light structure, and can meet the user's high requirements for appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the central light source and the concentrator assembly;

[0030] Figure 3 For the present invention Figure 1 A schematic diagram of a side cross-sectional structure;

[0031] Figure 4 This is a system schematic diagram of a first implementation of the light source driving system of the present invention;

[0032] Figure 5 This is a system schematic diagram of a second implementation of the light source driving system of the present invention;

[0033] Figure 6 This is a system schematic diagram of a third implementation of the light source driving system in the present invention;

[0034] Figure 7 This is a system schematic diagram of a fourth implementation of the light source driving system of the present invention;

[0035] Figure 8 This is a system schematic diagram of a fifth implementation of the light source driving system of the present invention;

[0036] Fig. 9 is a schematic diagram of a theoretical light path of the present invention;

[0037] Fig.10 (a) is the light distribution diagram formed at the screen 25m in front of the vehicle after adding a fill light pattern locally to the module lens (existing technology);

[0038] Fig.10 (b) is the light distribution diagram formed by the screen 25m in front of the vehicle according to the present invention;

[0039] Fig.11 A schematic diagram of low beam divisions required by existing relevant low beam regulations;

[0040] Fig.12 Schematic diagram of test points B50L and P8 required by existing relevant low beam regulations;

[0041] Fig.13 The schematic diagram is for adding fill light patterns locally to the module lens (existing technology). DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] A lighting device for stably realizing the low beam zone III of a vehicle, such as Figures 1 to 3 As shown, it includes a light source and a concentrator assembly 8, and a light source driving system. The light source and the concentrator assembly 8 are fixedly mounted on a heat sink 1. A circuit board 2 attached to the heat sink 1 is provided between the light source and the concentrator assembly 8 and the heat sink 1. A lens bracket 5 is fixedly mounted at the front end of the light source and the concentrator assembly 8, and a lens 6 is installed at the front end of the lens bracket 5.

[0044] The light source and concentrator assembly 8 includes a low-beam light source and a low-beam concentrator assembly 3 for illuminating low-beam zones I, II, and IV, and a fill-light light source and a fill-light concentrator assembly 7 for illuminating low-beam zone III. The light source driving system adjusts the illumination of low-beam zone III by individually adjusting the current of the fill-light light source and the fill-light concentrator assembly 7.

[0045] The technical solution of the present application also includes a light-blocking plate 4, which is installed between the low-beam light source and the low-beam concentrator assembly 3, and the fill-light light source and the fill-light concentrator assembly 7 through a slot relatively opened on the inner wall of the side of the lens bracket 5.

[0046] like Figure 4 As shown, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly 3, the fill light source and the fill light source in the fill light concentrator assembly 7. The low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light DC / DC constant current driving module.

[0047] Both the low beam light source and the fill light source are powered by a low beam power supply. After the low beam power supply is input, it is divided into two paths. One path powers the low beam light source through the low beam DC / DC constant current driver module, and the other path powers the fill light source through the fill light DC / DC constant current driver module.

[0048] The three DC / DC constant current sources can be realized through BUCK, SEPIC, BOOST TO BAT, and BOOST topologies. In this way, the three constant current sources can realize independent current regulation to achieve flexible adjustment of the brightness of each light source.

[0049] like Figure 5As shown, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly 3, the fill light source and the fill light source in the fill light concentrator assembly 7. The low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light DC / DC constant voltage driving module.

[0050] Both the low beam light source and the fill light source are powered by the low beam power supply. After the low beam power supply is input, it is divided into two paths. One path powers the low beam light source through the low beam DC / DC constant current driver module, and the other path powers the fill light source through the fill light DC / DC constant voltage driver module.

[0051] Two DC / DC constant current sources and one DC / DC constant voltage source can be realized through BUCK, SEPIC, BOOST TO BAT, BOOST topology. In this way, all three channels can realize independent current regulation to achieve flexible adjustment of the brightness of each light source.

[0052] like Figure 6 As shown, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly 3, the fill light source and the fill light source in the fill light concentrator assembly 7. The low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light linear constant current driving module.

[0053] Both the low beam light source and the fill light source are powered by a low beam power supply. After the low beam power supply is input, it is divided into two paths. One path powers the low beam light source through a low beam DC / DC constant current driver module, and the other path powers the fill light source through a fill light linear constant current driver module.

[0054] The two DC / DC constant current sources can be realized through BUCK, SEPIC, BOOST TO BAT, BOOST topology, and one linear constant current source can be realized by resistor, triode constant current circuit, linear constant current IC circuit, etc. All three constant current sources can realize independent current regulation to achieve flexible adjustment of the brightness of each light source.

[0055] like Figure 7 As shown, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly 3, the fill light source and the fill light source in the fill light concentrator assembly 7. The low-beam power supply powers the low-beam light source through a low-beam DC / DC constant current driving module, and the low-beam power supply powers the fill light source through a fill light DC / DC constant voltage driving module and a fill light linear constant current driving module.

[0056] Both the low beam light source and the fill light source are powered by the low beam power supply. After the low beam power supply is input, it is divided into two paths. One path powers the low beam light source through the low beam DC / DC constant current driver module, and the other path powers the fill light source through the fill light DC / DC constant voltage driver module and the fill light linear constant current driver module.

[0057] Two DC / DC constant current sources and one DC / DC constant voltage source can be realized through BUCK, SEPIC, BOOST TO BAT, BOOST topology, and linear constant current source can be realized by resistor, triode constant current circuit, linear constant current IC circuit, etc. All three channels can realize independent current regulation to achieve flexible adjustment of the brightness of each light source.

[0058] like Figure 8 As shown, the light source driving system includes a low-beam power supply for powering the low-beam light source and the low-beam light source in the low-beam concentrator assembly 3, the fill-light light source and the fill-light light source in the fill-light concentrator assembly 7. The low-beam power supply respectively powers the low-beam light source and the fill-light light source through a low-beam DC / DC constant current driving module and a constant current shunt circuit.

[0059] The low beam light source and the fill light source are both powered by a low beam power supply. After the low beam power supply is input, a constant current source is output to the constant current shunt circuit through the low beam DC / DC constant current drive module. The constant current shunt circuit divides the constant current source into two paths, one path powers the low beam light source, and the other path powers the fill light source.

[0060] Both DC / DC constant current sources can be realized through BUCK, SEPIC, BOOST TO BAT, BOOST topology structures. The constant current shunt circuit can be realized by resistor type, discrete component type and integrated IC circuit. The constant current shunt circuit can adjust the current ratio of the low beam light source and the fill light source according to demand.

[0061] like Figures 4 to 8 As shown, the light source and concentrator assembly 8 also includes a high-beam light source and a high-beam concentrator assembly, and the light source driving system also includes a high-beam power supply for powering the high-beam light source and the high-beam concentrator assembly, and the high-beam power supply powers the high-beam power supply through a high-beam DC / DC constant current driving module.

[0062] like Fig.10 As shown, by comparing Figures (a) and (b), it can be seen that the light distribution diagram formed by the technical solution of the present application at the screen 25m in front of the vehicle can effectively meet the existing relevant low beam regulations and achieve better lighting effects.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lighting device for stably realizing the low beam zone III of an automobile, characterized in that: The invention comprises a light source and a condenser assembly (8), and a light source driving system, wherein the light source and the condenser assembly (8) are fixedly mounted on a heat sink (1), a circuit board (2) attached to the heat sink (1) is provided between the light source and the condenser assembly (8) and the heat sink (1), a lens bracket (5) is fixedly mounted at the front end of the light source and the condenser assembly (8), and a lens (6) is mounted at the front end of the lens bracket (5); The light source and condenser assembly (8) comprises a low-beam light source and a low-beam condenser assembly (3) for illuminating low-beam zones I, II and IV, and a fill-light light source and a fill-light condenser assembly (7) for illuminating low-beam zone III. The light source driving system adjusts the illumination of low-beam zone III by individually regulating the current of the fill-light light source and the fill-light condenser assembly (7).

2. The lighting device for stably realizing the low beam zone III of a vehicle according to claim 1, characterized in that: The light source driving system comprises a low-beam power supply for supplying power to a low-beam light source and a low-beam light source in a low-beam concentrator assembly (3), a fill-light light source and a fill-light light source in a fill-light concentrator assembly (7); the low-beam power supply supplies power to the low-beam light source via a low-beam DC / DC constant current driving module, and the low-beam power supply supplies power to the fill-light light source via a fill-light DC / DC constant current driving module.

3. The lighting device for stably realizing the low beam zone III of an automobile according to claim 1, characterized in that: The light source driving system comprises a low-beam power supply for supplying power to a low-beam light source and a low-beam light source in a low-beam concentrator assembly (3), a fill-light light source and a fill-light light source in a fill-light concentrator assembly (7); the low-beam power supply supplies power to the low-beam light source via a low-beam DC / DC constant current driving module, and the low-beam power supply supplies power to the fill-light light source via a fill-light DC / DC constant voltage driving module.

4. The lighting device for stably realizing the low beam zone III of an automobile according to claim 1, characterized in that: The light source driving system comprises a low-beam power supply for supplying power to a low-beam light source and a low-beam light source in a low-beam concentrator assembly (3), a fill-light light source and a fill-light light source in a fill-light concentrator assembly (7); the low-beam power supply supplies power to the low-beam light source via a low-beam DC / DC constant current driving module, and the low-beam power supply supplies power to the fill-light light source via a fill-light linear constant current driving module.

5. The lighting device for stably realizing the low beam zone III of an automobile according to claim 1, characterized in that: The light source driving system comprises a low-beam power supply for supplying power to a low-beam light source and a low-beam light source in a low-beam concentrator assembly (3), a fill-light light source and a fill-light light source in a fill-light concentrator assembly (7); the low-beam power supply supplies power to the low-beam light source via a low-beam DC / DC constant current driving module; and the low-beam power supply supplies power to the fill-light light source via a fill-light DC / DC constant voltage driving module and a fill-light linear constant current driving module.

6. The lighting device for stably realizing the low beam zone III of an automobile according to claim 1, characterized in that: The light source driving system comprises a low-beam power supply for supplying power to a low-beam light source and a low-beam light source in a low-beam concentrator assembly (3), a fill-light light source and a fill-light light source in a fill-light concentrator assembly (7), wherein the low-beam power supply supplies power to the low-beam light source and the fill-light light source respectively through a low-beam DC / DC constant current driving module and a constant current shunt circuit.

7. The lighting device for stably realizing the low beam zone III of an automobile according to any one of claims 2 to 6, characterized in that: The light source and condenser assembly (8) further comprises a high-beam light source and a high-beam condenser assembly, and the light source driving system further comprises a high-beam power supply for supplying power to the high-beam light source and the high-beam condenser assembly, and the high-beam power supply supplies power to the high-beam power supply via a high-beam DC / DC constant current driving module.

8. The lighting device for stably realizing the low beam zone III of an automobile according to claim 1, characterized in that: It also comprises a light shielding sheet (4), which is installed between the low-beam light source and the low-beam condenser assembly (3), and the fill-light light source and the fill-light condenser assembly (7) via a slot relatively provided on the inner wall of the side of the lens bracket (5).

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