TWM591586U - Light source device for car - Google Patents

Abstract

A vehicle lighting device for low beam lights includes a light emitting module, a condenser lens, and a light guide. The light guide has a hollow light guide structure, and defines a light entrance side and a light exit side away from the light entrance side. The light emitting module and the condenser lens are respectively disposed on the light entrance side and the light exit side. When a light guide with a hollow light guide structure is used, compared with a solid transparent plastic or silicone light guide, the phenomenon of heat aging or deformation of the light guide can be avoided, and the service life can be extended.

Description

Vehicle lighting device

The present invention relates to a vehicle lighting device, especially a miniaturized vehicle lighting device that can meet the illuminance requirement.

According to legal requirements, the front side of the vehicle must be equipped with high beam lights, low beam lights and direction lights, and daytime running lights are also becoming more and more popular. With the diversified changes in the shape of the car body, the front surface of the car body is also used for the location of the aforementioned light With fewer and fewer lights, the light output area is getting smaller and smaller; even so, the lights still have to comply with the brightness, light type, and irradiation angle of the regulations to ensure the safety of driving.

The present invention provides a vehicle lighting device, which is used to set a narrow and long light type, but can still meet the required light type and illuminance.

Based on the above objective, a vehicle lighting device is provided, which includes a light emitting module, a condenser lens, and a light guide. The light guide is hollow columnar and defines a light incident side and a light exit side away from the light entrance side. The light emitting module and the condenser lens are respectively disposed on the light entrance side and the light exit side.

In addition, the light guide member may be composed of at least two shells, and adjacent surfaces of the shells have a plurality of side walls that cooperate with each other to form a light guide structure.

The hollow light guide structure is used to provide the light guide function of the light-emitting parts. The outline of the side wall of the housing can be used to define the light-type boundary of the light side to produce a suitable light shape. In addition, compared with the use of solid transparent plastic or silicone light guides, The hollow light guide structure can also avoid the phenomenon of thermal aging of components. Further, the solid light guide column can also be disposed in the hollow light guide structure. In addition to meeting the light mixing requirements, the hollow light guide structure can also provide a support function to protect the light guide column from thermal deformation.

The vehicle lighting device can be arranged in a modular structure, and the light-emitting module includes only one light-emitting element, corresponding to the same number of light guide structures and condenser lenses. The light-emitting module may also be a main light-emitting element forming a central light source, and supplementing light with the secondary light-emitting elements on both sides thereof to produce a narrow and long light type to meet the illuminance, and at the same time reduce the volume of the vehicle lighting device. In addition, the light-emitting elements can be electrically connected to a control module, and the intensity of the supplementary light can be adjusted by the control module.

The following description is described with the light output direction of the vehicle lamp as the front, so as to conform to the general understanding of those skilled in the art. In order to clearly explain the specific implementation mode, structure and achieved effect of this creation, an example is provided and illustrated with the drawings as follows:

Please refer to FIG. 1 to FIG. 3, which illustrates a low-beam vehicle lighting device, in which a condenser lens 20, a carrier 15 integrated with a light guide 10, a light-emitting module 30, and a heat dissipating fin 40 are arranged in order from front to back . The light guide 10 has a hollow cylindrical inner side wall provided with a reflective coating, the bearing base 15 is formed integrally with the light guide 10, and defines the installation positions of the condensing lens 20 and the light emitting module 30, and the heat dissipation fin 40 is light emitting The optical axis of the module 30 is vertical.

In this embodiment, the light-emitting module 30 has a mounting base 31 to position a light-emitting element 330 to provide a sufficient light source. The light guide element 10 is hollow and defines a light incident side and a light exit side away from the light entrance side. The light emitting module 30 is disposed on the light exit side, and the condensing lens 20 is fixed to the carrier 15 by ultrasonic fusion and is adjacent to the light exit side. In addition, the profile of the light entrance side is smaller than that of the light exit side, and defines the total input light source and output light source boundary of the light emitting element 330 respectively, and the condenser lens 20 is used to modify and concentrate the output light type to obtain a better average Optical.

By forming the light-emitting module 30, the light guide 10, and the light-emitting module 30 into a modular structure, the lighting device can be miniaturized and used for supplementary light or other lighting purposes.

Please refer to FIG. 4 to FIG. 7, which shows that the vehicle lighting device differs from the previous embodiment in that the light-emitting module 30 includes a main light-emitting element 332 and two secondary light-emitting elements 331,333 disposed on the main light-emitting element On the two opposite sides of 332, three light-emitting elements 331, 332, and 333 are disposed on the mounting base 31, which are separated from each other and arranged on the same straight line, so that the light-emitting module 30 forms a narrow and long module with a width of about 2 cm. The number of the condensing lens 20 corresponds to the number of light-emitting elements, forming side-by-side lens modules, and the lens position corresponds to the position of the light exit side.

In addition, in this embodiment, the light guide 10 is composed of an upper casing 11 and a lower casing 12, and the surface where the upper casing 11 and the lower casing 12 meet has a plurality of side walls 111, 112, 113, 121, 122, 123 that are convex or concave When the two housings are combined, the corresponding side walls (111 and 121, 112 and 122, 113 and 123) form a hollow column, and the number and position of the hollow columns correspond to the number and position of the light-emitting elements. The side walls 111, 112, 113, 121, 122, and 123 are provided with metal reflective coating to form a hollow The light guide structure and define the light entrance side and light exit side. The light-emitting elements 331, 332, 333 and the condensing arc surfaces of the corresponding condensing lens 20 are respectively aligned with the light entrance side and the light exit side of the hollow light guide structure, so that when the light source is guided to the light exit side, the lens focuses and modifies the light type.

By forming a primary light-emitting element as the central light source and supplementing the secondary light-emitting elements on both sides, a narrow and long light pattern can be generated, which not only satisfies the illuminance, but also reduces the volume of the vehicle lighting device. The hollow light guide structure is used to guide the light emitted by the light-emitting parts. In addition to increasing the homogeneity, the light-side boundary of the light side can be defined by the contour of the side wall of the housing to generate a suitable light shape, compared with the use of solid transparent plastic Or silicone light guides, the use of hollow light guide structure can also avoid the phenomenon of thermal aging of components.

Please refer to FIGS. 6 and 7. In this embodiment, the hollow light guide structure forms a closed cylindrical outline in front of the light emitting module 30, and the surfaces of the upper and lower housings 11 and 12 can be divided into contact surfaces and form a hollow light guide The side wall surface of the structure. Therefore, the reflective coating film may be located at least on the side wall surface constituting the hollow light guide structure; however, the reflective coating film may also completely cover the adjacent surfaces of the upper and lower housings 11,12. In addition, the contact surfaces of the upper and lower casings 11 and 12 and the side walls of the hollow light guide structure share the same boundary line in the front and rear directions to avoid light leakage from the side. The casing may be a thermally conductive material to prevent the module from overheating.

In this embodiment, the upper and lower housings 11 and 12 also extend toward the light-emitting direction to form two clamping platforms 13 and 14 respectively, which serve as positioning and clamping pieces for the condenser lens 20 to reduce the number of components and assembly steps.

In this embodiment, the main light-emitting element 332 is a 2-crystal LED, which has a stepped profile corresponding to the hollow light guide column, and generates a center light source with high right and left low when the light source is projected; the secondary light-emitting elements 331,333 are 3-crystal. The LEDs have different lengths corresponding to the light-type boundary, so as to correspond to the supplementary light requirement of the two sides of the main light-emitting element 332. However, the light-emitting elements 331, 332, and 333 can also be electrically connected to a control module to adjust the intensity of the light-emitting elements 331, 333 for supplementary light.

It is added here that a solid light guide column can also be provided inside the light guide 10 to provide a light mixing effect, and a hollow light guide structure can also provide a support function to protect the light guide column from thermal deformation.

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10: Light guide 11: Upper case 12: Lower case 111, 112, 113, 121, 122, 123: side wall 13, 14: clamping platform 15: Carrier 20: Condenser lens 30: Light emitting module 31: Mount 330,331,332,333: luminous parts 40: cooling fins

FIG. 1 is a schematic view of the appearance of a low-beam vehicle lighting device.

Fig. 2 is an exploded view of the component of Fig. 1.

3 is a cross-sectional view of the hollow light guide column of FIG.

4 is a schematic view of the appearance of another embodiment of a low-beam vehicle lighting device.

Fig. 5 is an exploded view of the component of Fig. 4.

6 is a cross-sectional view of the hollow light guide column of FIG. 4.

7 is a longitudinal cross-sectional view of the hollow light guide column of FIG. 4.

10: Light guide

15: Carrier

20: Condenser lens

31: Mount

330: luminous parts

40: cooling fins

Claims (10)

A vehicle lighting device includes: a light emitting module; a condensing lens; and a light guide, which is in the shape of a hollow column and defines a light incident side and a light emitting side away from the light incident side, the light emitting module and the light emitting module The condenser lenses are respectively disposed on the light incident side and the light exit side. The vehicle lighting device according to claim 1, wherein the light guide member is composed of at least two housings, and adjacent surfaces of the housings have a plurality of side walls cooperating to form a light guide structure. The vehicle lighting device according to claim 2, wherein the housing surfaces are provided with a reflective surface to form the light guide structure. The vehicle lighting device according to claim 3, wherein the housings extend toward a light-emitting direction to form a clamping member to set the condenser lens. The vehicle lighting device according to claim 3, wherein the contours of the side walls define a light-type boundary on the light-emitting side. The vehicle lighting device according to claim 3, wherein the side walls are convex or concave. The vehicle lighting device according to claim 1, wherein the light emitting module is electrically connected to a control module. The vehicle lighting device according to any one of claims 1 to 7, wherein a light guide column is provided inside the light guide. The vehicle lighting device according to any one of claims 1 to 7, wherein the light emitting module includes a main light emitting element and a secondary light emitting element disposed on opposite sides of the main light emitting element. The vehicle lighting device according to claim 9, wherein the number of the condenser lens and the light guide corresponds to the number of the light-emitting elements.

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