TW202115344A - light source device for car - Google Patents

Abstract

Disclosed is an automotive lighting device for low-beam light, The automotive lighting device includes a light emitting module, a condensing lens and a light guiding member. The light guiding member has a hollow light guiding structure and defines a light incident side and a light emitting side away from the light incident side. The light emitting module and the condensing lens are respectively disposed at the light incident side and the light emitting side. Compared with adopting a solid transparent plastic or silicon light guiding member, the light guiding member which adopts the hollow light guiding structure is capable of avoiding light guiding member from the phenomenon of heat ageing or deformation caused by irradiation, so as to prolong the service life.

Description

Vehicle lighting device

The present invention relates to a lighting device for a vehicle, particularly a miniaturized lighting device for a vehicle that can meet the illumination requirements.

According to regulations, high beams, low beams and direction lights must be installed on the front of the vehicle, and daytime running lights are becoming increasingly popular, and with the multiple changes in the body shape, the front surface of the vehicle body is used to install the position of the aforementioned lights. With fewer and fewer lights, the light output area of the car lights is getting smaller and smaller; even so, the car lights must still comply with the brightness, light type, and illumination angle of the regulations to ensure the safety of driving.

The present invention provides a vehicle lighting device, which is applied to set a long and narrow 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 in the shape of a hollow column 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 arranged on the light entrance side and the light exit side.

In addition, the light guide can be composed of at least two shells, and the 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 luminous element. The light type boundary on the light exit side can be defined by the contour of the side wall of the housing to produce a suitable light shape. In addition, compared to solid transparent plastic or silicone light guides, The hollow light guide structure can also avoid the phenomenon of thermal aging of the components. Further, the solid light guide post can also be arranged in the hollow light guide structure. In addition to meeting the light mixing requirement, the hollow light guide structure can also provide a supporting function to protect the light guide post 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 can also be a main light-emitting element to form a central light source, and complement the light with the secondary light-emitting elements on the two sides to generate a long and narrow light type that meets 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 emitting direction of the vehicle lamp as the front, so as to conform to the common understanding of those skilled in the art. In order to clearly illustrate the specific implementation, structure, and achieved effects of this creation, an example is provided and illustrated with the drawings as follows:

Please refer to Figures 1 to 3, which illustrate a low beam vehicle lighting device. A condenser lens 20, a carrier 15 integrated light guide 10, a light-emitting module 30, and a heat sink 40 are sequentially arranged from the front to the rear. . The light guide 10 has a hollow cylindrical inner side wall with reflective coating, the carrier 15 and the light guide 10 are integrally formed, and the installation positions of the condenser lens 20 and the light-emitting module 30 are defined. The heat dissipation fins 40 and the light-emitting The optical axis of the module 30 is vertical.

In this embodiment, the light-emitting module 30 has a mounting seat 31 for positioning a light-emitting element 330 to provide sufficient light source. The light-guiding element 10 is in the shape of a hollow column and defines a light-incident side and a light-exit side away from the light-incident side. The light-emitting module 30 is arranged on the light-emitting side, and the condensing lens 20 is fixed to the supporting base 15 by ultrasonic fusion and is adjacent to the light-emitting side. In addition, the profile on the light entrance side is smaller than the profile on the light exit side, and defines the total amount of input light source and the light type boundary of the output light source of the light-emitting element 330. The condenser lens 20 is used to modify and concentrate the output light pattern to obtain a better uniformity. Lightness.

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 FIGS. 4 to 7, the difference between the vehicle lighting device shown in the previous embodiment is 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 two opposite sides of 332, three light-emitting elements 331, 332, and 333 are arranged on the mounting seat 31, which are separated from each other and arranged in 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 condensing lenses 20 corresponds to the number of light-emitting elements, forming a side-by-side lens module, and the position of the lens corresponds to the position of the light-emitting side.

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

By forming one main light-emitting element as a central light source and supplementing light with secondary light-emitting elements on both sides, a long and narrow light type can be produced, 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 element. In addition to increasing the light homogeneity, the contour of the side wall of the housing can also define the light type boundary on the light emitting side to produce a suitable light shape. Compared with solid transparent plastics Or the silicone light guide, the hollow light guide structure can also avoid the phenomenon of thermal aging of the element.

6 and 7, in this embodiment, the hollow light guide structure forms a closed cylindrical profile in front of the light emitting module 30, and the surfaces of the upper and lower housings 11, 12 can be divided into contact surfaces and form a hollow light guide The sidewall surface of the structure. Therefore, the reflective coating can be located at least on the surface of the side wall constituting the hollow light guide structure; however, the reflective coating can also completely cover the adjacent surfaces of the upper and lower housings 11 and 12. In addition, the contact surfaces of the upper and lower housings 11, 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 housing can be made of thermally conductive material to avoid overheating of the module.

In this embodiment, the upper and lower housings 11, 12 also extend toward the light-emitting direction to form two clamping platforms 13, 14 respectively, which serve as positioning and clamping parts for the condenser lens 20, reducing 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 produces a center light source that is higher in the right and lower in the left 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 borders, so as to correspond to the supplementary light requirements of the illumination range 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 to supplement light.

It is supplemented here that a solid light guide rod can also be arranged inside the light guide 10 to provide light mixing effect, and the hollow light guide structure can also provide a supporting effect, so that the light guide rod is not thermally deformed.

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10: Light guide 11: Upper shell 12: Lower shell 111, 112, 113, 121, 122, 123: sidewall 13, 14: clamping platform 15: bearing seat 20: Condenser lens 30: Light-emitting module 31: Mounting seat 330, 331, 332, 333: light-emitting parts 40: cooling fins

Figure 1 is a schematic diagram of the appearance of a low beam vehicle lighting device.

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

Fig. 3 is a cross-sectional view of the hollow light guide in Fig. 1;

Fig. 4 is a schematic diagram of the appearance of another embodiment of a low beam vehicle lighting device.

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

Fig. 6 is a cross-sectional view of the hollow light guide in Fig. 4;

Fig. 7 is a longitudinal cross-sectional view of the hollow light guide in Fig. 4;

10: Light guide

15: bearing seat

20: Condenser lens

31: Mounting seat

330: light-emitting parts

40: cooling fins

Claims (10)

A vehicle lighting device, including: A light-emitting module; A condenser lens; and A light guide is in the shape of a hollow column 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 arranged on the light entrance side and the light exit side. The vehicle lighting device according to claim 1, wherein the light guide is composed of at least two housings, and adjacent surfaces of the housings have a plurality of side walls that cooperate to form a light guide structure. The vehicle lighting device according to claim 3, wherein a reflective surface is provided on the surfaces of the housings 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 for setting the condenser lens. The vehicle lighting device according to any one of 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 rod is arranged inside the light guide member. 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 arranged on two 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 structure corresponds to the number of the light-emitting elements.

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