WO2020244117A1

WO2020244117A1 - Vehicle lighting apparatus

Info

Publication number: WO2020244117A1
Application number: PCT/CN2019/111249
Authority: WO
Inventors: 严梦; 何士群; 胡克磊; 王沁沁; 王昭青; 祝贺
Original assignee: 华域视觉科技(上海)有限公司
Priority date: 2019-06-05
Filing date: 2019-10-15
Publication date: 2020-12-10
Also published as: CN110107861A

Abstract

Disclosed is a vehicle lighting apparatus, relating to the technical field of vehicle lighting. The vehicle lighting apparatus comprises a flexible circuit board (1), a light source array (5), a silicone encapsulation case (3) and an integrated control module, wherein the light source array (5) is integrated at one end of the flexible circuit board (1); the silicone encapsulation case (3) is connected to an end face of the flexible circuit board (1), and is used for encapsulating the light source array (5); and the integrated control module is electrically connected to the flexible circuit board (1), and is used for controlling the turning-on/off of the light source array (5) according to a set time sequence. A substrate of the vehicle lighting apparatus is the flexible circuit board (1), and the flexible circuit board (1) is soft and bendable, such that the appearance of the lighting apparatus is variable and can adapt to changes in the shape of a vehicle headlight; the lighting effect of the light source array (5) is uniform; and at the same time, the integrated control module is used for controlling the light source array (5) to jump between a turned-on state and a turned-off state according to a time sequence, such that running-form dynamic turning on/off can be realized, thereby enriching the visual effect of the vehicle headlight.

Description

Vehicle lighting device

Technical field

The invention relates to the field of vehicle lighting, in particular to a vehicle lighting device.

Background technique

As an important exterior part of a vehicle, car lights require both stylish appearance and good lighting effects. In the design process of car lights, the requirements for car lights and lighting effects are becoming higher and higher. Patent application CN108571701A discloses a light guide module for car lights, which includes at least one light guide tube. The light entrance surface of the light guide tube is provided with a light source. If the side wall of the light guide tube is smooth, the light emitted by the light source will be It enters from one end of the light pipe and emits from the other end after total reflection occurs in the light pipe. In order to make the side wall of the light pipe a light-emitting surface, it is generally necessary to design a toothed shape on the side wall of the light pipe For the pattern, since the reflection angle of the light on the toothed pattern does not meet the critical angle of total reflection of the light, the light can be emitted from the side wall of the light pipe to form the lighting effect of the side wall of the light pipe. Although the above-mentioned car light guide device can obtain a narrow light band with a linear appearance, the light-emitting state of the light guide tube will turn on or off at the same time as the end surface light source turns on and off. The visual effect is single, and timing lighting or other dynamics cannot be achieved. The form of lighting control effect. In addition, since the light-emitting surface of the light guide tube is provided with a toothed pattern, when the light-emitting surface of the light guide tube emits light, the light-emitting surface will have uneven lighting effect due to the different refraction angles of the light.

Therefore, the existing vehicle lighting device cannot achieve sequential lighting or other dynamic forms of on-off control effects, and also has the defect of uneven luminous effects in the light-emitting area, which cannot satisfy the diversification of vehicle lights in terms of modeling and lighting effects. Individual needs.

Summary of the invention

The purpose of the present invention is to overcome the problems that the existing vehicle lighting device cannot achieve the control effect of sequential lighting or other dynamic lighting and lighting, and the uneven lighting effect of the lighting area.

In order to achieve the above objective, the present invention provides a vehicle lighting device, which includes a flexible circuit board, a light source array, a silicone encapsulation shell, and an integrated control module;

The light source array is integrated on one end surface of the flexible circuit board;

The silicone encapsulation shell is connected to the end surface of the flexible circuit board for encapsulating the light source array;

The integrated control module is electrically connected to the flexible circuit board, and is used to control the light source array on and off according to a set time sequence.

Preferably, a plurality of point light sources are arranged in at least one column at a certain interval along the extension direction of the flexible circuit board to form the light source array;

The light source array includes an independent point light source and a point light source group connected in series by a plurality of point light sources;

The integrated control module is configured to output a first control signal that drives the point light source to turn on and off in a time sequence and a second control signal that drives the point light source group to turn on and off in a time sequence.

Preferably, when the point light sources are arranged in a row along the extension direction of the flexible circuit board, the cross section of the silicone encapsulation shell is rectangular or peak-shaped;

When the point light sources are arranged in two or more columns along the extension direction of the flexible circuit board, the cross section of the silicone encapsulation shell is rectangular or continuous peak shape.

Preferably, the maximum distance between the emission centers of every two adjacent point light sources is 10-15 mm.

Preferably, the point light source is a light emitting diode LED or a light emitting chip;

The point light source is a monochromatic light source or a multi-color light source, and is used to realize multiple light distribution functions.

Preferably, a light scattering agent is uniformly dispersed in the silicone encapsulation shell.

Preferably, the open end of the silicone encapsulation shell is fixed on the end surface of the flexible circuit board, and forms a cavity with the end surface of the flexible circuit board;

A light source protective cover is arranged in the cavity.

Preferably, the flexible circuit board integrated with the light source array is integrally packaged with silica gel, so that there is no gap between the silicone encapsulation shell and the light source array.

Preferably, the vehicle lighting device further includes a light guide member installed on the light-emitting side of the light source array;

The light guide area of the light guide includes a light entrance surface and a light exit surface, and the light entrance surface of the light guide region can be provided with skin patterns or coated with a light scattering layer.

Preferably, the vehicle lighting device further includes a heat dissipation bracket provided on the other end surface of the flexible circuit board facing away from the light source array.

Through the above technical solution, since the substrate of the vehicle lighting device is a flexible circuit board, the flexible circuit board is soft and can be bent, so that the shape of the lighting device is changeable, can adapt to the shape change of the vehicle lamp, and the lighting effect of the light source array is uniform. At the same time, the integrated control module is used to control the light source array to switch on and off according to the time sequence. The light source array can realize the dynamic on and off in a stream, which enriches the visual effect of the car lights.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a vehicle lighting device;

2 is a cross-sectional view of the vehicle lighting device according to Embodiment 1;

3 is a cross-sectional view of a vehicle lighting device in a preferred embodiment of Example 1;

4 is a cross-sectional view of the vehicle lighting device according to Embodiment 2;

Figure 5 is a cross-sectional view of a vehicle lighting device in a preferred embodiment of Example 2;

6 is a cross-sectional view of a vehicle lighting device according to Embodiment 3;

7 is a cross-sectional view of a vehicle lighting device according to Embodiment 4;

Description of reference signs

1-flexible circuit board; 2-light source array; 3-silicone encapsulation shell; 4-light guide; 5-LED light source; 6-light source protective cover.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

The present invention provides a vehicle lighting device. As shown in FIG. 1, the vehicle lighting device includes a flexible circuit board 1, a light source array 2, a silicone encapsulation shell 3, and an integrated control module.

Wherein, the light source array 2 is integrated on one end surface of the flexible circuit board 1. The end surface of the flexible circuit board 1 where the light source array 2 is installed is covered with a silicone encapsulating shell 3, and the silicone encapsulating shell 3 is connected to the end surface of the flexible circuit board 1 for encapsulating the light source array 2. The integrated control module is electrically connected to the flexible circuit board 1 and is used to control the light source array 2 on and off according to a set time sequence.

Compared with a hard resin circuit board or a metal circuit board, the flexible circuit board 1 is light in weight, small in thickness, and flexible, and can be appropriately changed in shape, so the installation flexibility is high. When the light source array 2 in the embodiment of the present invention is integrated on the flexible circuit board 1, it has the advantages of high wiring density and less space restriction. Moreover, since both the flexible circuit board 1 and the silicone encapsulation shell 3 are bendable, the vehicle lighting device can be flexibly bent according to the needs of the vehicle lamp shape, which is convenient to install and has strong adaptability.

When the shape of the flexible circuit board 1 extends in a belt-like trend, according to a preferred embodiment of the present invention, a number of point light sources are arranged in at least one row at a certain interval along the extending direction of the flexible circuit board 1 to form the light source array 2. In practical applications, the point light sources are integrated on the flexible circuit board 1 in an array, and the overall structure after being encapsulated by the silicone encapsulation shell 3 is called a light strip.

In this embodiment, the light source array 2 includes an independent point light source and a point light source group connected in series by a plurality of point light sources. The integrated control module is used to control the light source array 2 on and off according to a set timing. The control signal output by the integrated control module includes a first control signal for driving the point light source to turn on and off according to the time sequence and a first control signal for driving the point light source group on time. The second control signal that turns on and off in sequence. The entire light source array 2 is composed of multiple point light sources and multiple point light source groups. Each point light source and point light source group can independently switch on and off. Through the control of the integrated control module, the effect of timing and dynamic lighting can be realized .

Under the control of the integrated control module, the light source array 2 turns on and off according to the time sequence, including but not limited to: any one or more independent point light sources turn on and off according to the time sequence, or any one or more groups of point light sources connected in series according to the time sequence Turn on and off, and turn on and off sequentially from one end of the light source array 2 to the other end to form a flowing water effect. Since the flexible circuit board 1 is encapsulated by the silicone encapsulation shell 3, the shape of the light strip obtained is narrow and long, which can create a flexible pipeline-type car lamp shape. When the integrated control module drives the light source array 2 in sequence from one end to the other to turn on and off , The lighting effect of dynamic flowing water is formed.

In practical applications, the center distance between two adjacent point light sources is generally 2 to 5 mm. Because the distance between the light sources is too large, the uniformity of light emission will be deteriorated. Therefore, according to a preferred embodiment of the present invention, every two adjacent point light sources The maximum distance between the emission centers of the point light sources is 10-15 mm.

According to a preferred embodiment of the present invention, the point light source in the light source array 2 may be a light emitting diode LED or a light emitting chip. The point light source is a monochromatic light source or a multi-color light source, which is used to realize multiple light distribution functions. The monochromatic light source emits only one color of light, and the work information is transmitted through its on-off state; the multi-color light source is a multi-color composite point light source or a composite light source including at least two monochromatic light sources. The off state or the conversion of the luminous color to convey work information.

Taking a two-color light source as an example, a two-color LED or a two-color light-emitting chip can be used in the light belt to realize the combination of two or more light distribution functions. The two-color light source can be a two-color light-emitting chip or a two-color LED packaged on a circuit board, or two monochromatic LEDs with different light-emitting colors can be packaged independently on the circuit board, for example, two different color LEDs are divided into two rows Installed on the flexible circuit board 1, the LEDs of each column have the same color and are encapsulated into a light strip; or, two LEDs of different colors are arranged in a row at intervals. In the application of car lights, the yellow light source and white light source are combined in the same light band to realize the functions of daytime running lights, front position lights and front turn lights respectively, or use yellow light sources and red light sources for compounding, respectively. The functions of the rear tail light (ie parking light), brake light (ie brake light) and rear turn signal light.

Since silica gel is a material with good electrical insulation, high temperature resistance, corrosion resistance, good heat dissipation, and soft texture, when the silicone encapsulation shell 3 encapsulates the flexible circuit board 1 and the light source array 2, both the flexible circuit board 1 and the light source array 2 are Has a good protective effect. As a preferred embodiment of the present invention, a light scattering agent is uniformly dispersed in the silica gel package shell 3. Preferably, the light scattering agent may include one or a combination of two or more of barium sulfate, calcium carbonate, silicon dioxide, and organic silicon. When inorganic nanoparticles such as barium sulfate, calcium carbonate and silica are added to the silica gel encapsulation shell 3, the light will be refracted multiple times on the surface of the tiny particles to achieve light diffusion, that is, to achieve the effect of uniform light; when the silica gel encapsulation shell 3 is added organic In the case of silicon light diffusing agent, because the refractive index of the substrate and the organic silicon microbeads are different, after multiple light refraction, the soft light effect can also be achieved, and the light energy loss is less. Silicone light diffusers have the advantages of high light diffusion efficiency, good compatibility with the matrix resin, good dispersibility and heat resistance, low addition, and a balance of light transmittance and uniformity.

In this embodiment, transparent silica gel doped with a light scattering agent is used as the material of the silica gel encapsulation shell 3. When the light emitted by the light source passes through the silica gel encapsulation shell 3, the light scattering agent and the silica gel have different refractive indices. Refraction occurs, which changes the path of light and expands the spreading range to achieve uniform light. Since the distance between two adjacent point light sources does not exceed 15 mm, the light passing through the silicone encapsulation shell 3 comes from all directions It seems that they are continuous and uniform, that is, the light-emitting surface of the lighting device of the present invention has a uniform light-emitting effect.

In practical applications, when the flexible circuit board 1 integrated with the light source array 2 is packaged, there are at least two packaging methods, including separate assembly and integrated packaging.

For split assembly, design the corresponding model of the silicone encapsulation shell 3 according to the arrangement of the light source array 2 on the flexible circuit board 1, and use the model to independently process the silicone encapsulation shell 3 to obtain the standard parts of the silicone encapsulation shell 3 , And then assemble the standard parts of the silicone encapsulation shell 3 and the flexible circuit board 1 integrated with the light source array 2 together. Through the above method of separate processing and reassembly, it is beneficial to the mass and large-scale production of the silicone encapsulation shell 3. At the same time, the flexible circuit board 1 with the light source will not be scrapped when the silicone encapsulation shell 3 is poorly processed, which can avoid packaging errors and reduce cost.

When the silicone encapsulation shell 3 is separately processed and formed, it has an open end, and the open end of the silicone encapsulation shell 3 is fixed on the end surface of the flexible circuit board 1, so that the silicone encapsulation shell 3 and the flexible circuit board 1 are assembled together. The packaging shell 3 and the end surface of the flexible circuit board 1 form a cavity. Alternatively, the silicone encapsulation shell 3 and the flexible circuit board 1 can also be assembled mechanically. According to a preferred embodiment of the present invention, a protective layer of the light source array 2 can be further provided in the cavity enclosed by the silicone encapsulation shell 3 and the end surface of the flexible circuit board 1.

According to another preferred embodiment of the present invention, the flexible circuit board 1 integrated with the light source array 2 is integrally packaged with silica gel, so that there is no gap between the silicone encapsulation shell 3 and the light source array 2. Due to the high processing accuracy of the integrated processing, the assembly error between the silicone packaging shell 3 and the flexible circuit board 1 can be reduced.

In the present invention, a number of point light sources are arranged in an array on the flexible circuit board 1 at certain intervals. When a number of LEDs are arranged in a row along the extension direction of the flexible circuit board 1, the cross section of the silicone encapsulation shell 3 can be Rectangle, triangle or peak shape; when several LEDs are arranged in two or more columns along the extension direction of the flexible circuit board 1, the cross section of the silicone encapsulation shell 3 can be rectangular or continuous peak shape.

Further, the vehicle lighting device further includes a light guide 4 installed on the light-emitting side of the light source array 2. The light guide area of the light guide 4 includes a light entrance surface and a light exit surface. The light entrance surface of the light guide 4 is the side of the light guide 4 that is closer to the light source array 2, and the light exit surface is on the light guide 4 The side farther from the light source array 2. The light incident surface of the light guide 4 is substantially parallel to the extending direction of the light strip, and the light incident surface is usually narrow, and is used to receive light propagating in the vertical direction of the light strip. According to a preferred embodiment of the present invention, the light-incident surface of the light guide 4 may be provided with skin patterns, light guide teeth or coated with a light scattering layer. When the light emitted by the light source passes through the silicone encapsulation shell 3 and then enters the light entrance surface of the light guide 4, the skin texture, light guide teeth or light scattering layer causes the light to be refracted. Continuous and uniform light output can be observed from any angle. In the present invention, by adding a light scattering agent to the silicone encapsulation shell 3 or arranging skin textures, light guiding teeth or coating a light scattering layer on the light incident surface of the light guide 4, it is used to scatter light and achieve the purpose of uniform light. In practical applications, the above-mentioned homogenization measures can be selected.

Further, the vehicle lighting device further includes a heat dissipation bracket, which is arranged on the other end surface of the flexible circuit board 1 facing away from the light source array 2, and the heat dissipation bracket is used to mount the flexible circuit board 1 and the flexible circuit board 1. The LEDs on the LEDs are used for heat dissipation.

The arrangement of the light source array and the shape and effect of the silicone encapsulation shell 3 under different arrangements will be described below.

Example 1

As shown in FIG. 2, when several LED light sources 5 are arranged in a row on the flexible circuit board 1 at a certain interval, the cross section of the silicone encapsulation shell 3 is rectangular. The transparent surface of the silicone encapsulation shell 3 includes a plane extending vertically outward from the end surface of the flexible circuit board 1, and a plane connected to the vertical plane and parallel to the end surface of the flexible circuit board 1, that is, the transparent surface of the silicone encapsulation shell 3 is Plane structure, the transparent surface of the planar structure has a divergent effect on the light, which expands the illumination range, but less light propagates along the vertical direction of the light belt, less light enters the light incident surface of the light guide 4, and the luminous efficiency is higher. low.

In this embodiment, the flexible circuit board 1 may be integrally packaged with silica gel, so that there is no gap between the silica gel package shell 3 and the LED light source 5. Or, according to a preferred implementation of Example 1, when the silicone encapsulation shell 3 and the flexible circuit board 1 are assembled together, as shown in FIG. 3, the cavity enclosed by the silicone encapsulation shell 3 and the flexible circuit board 1 is provided with The light source protection cover 6 is located between the LED light source 5 and the silicone encapsulation shell 3 and is used to provide buffer protection for the LED light source 5 when the light strip is bent. At the same time, since the assembled light belt still has flexible characteristics, the light source protective cover 6 should also be made of flexible materials, including transparent silica gel, resin, and the like.

Example 2

As shown in Figure 4, when a number of LED light sources 5 are arranged in a row on the flexible circuit board 1 at a certain interval, the cross section of the silicone encapsulation shell 3 is a peak shape, and the transparent surface of the silicone encapsulation shell 3 is a self-flexible circuit The end of the board 1 faces a convex arc-shaped surface, and the arc-shaped surface forms a peak-shaped structure as a whole for sealing the LED light source 5. The arc-shaped light-transmitting surface has a converging effect on the light, converging the light emitted by the LED light source 5 in the vertical direction of the extending direction of the light strip, so that more light enters the light-incident surface of the light guide 4, thereby improving the illumination effectiveness. At the same time, the arc-shaped transparent surface does not affect the light distribution along the tangential direction of the light belt trend, so it will not cause the problem of uneven light emission.

In this embodiment, the flexible circuit board 1 may be integrally packaged with silica gel, so that there is no gap between the silica gel package shell 3 and the LED light source 5. Or, according to a preferred implementation of Embodiment 2, as shown in FIG. 5, a light source protective cover 6 is provided in the cavity enclosed by the silicone encapsulation shell 3 and the flexible circuit board 1, and the light source protective cover 6 is located on the LED light source 5. Between it and the silicone encapsulation shell 3, it is used to provide buffer protection for the LED light source 5 when the light strip is bent.

Example 3

As shown in Figure 6, a number of LED light sources 5 are arranged in two rows on the flexible circuit board 1. The cross section of the silicone encapsulation shell 3 is rectangular, that is, the transparent surface of the silicone encapsulation shell 3 is a flat structure, and the light guide is not Shown in Figure 6. According to a preferred implementation of Example 3, a light source protective cover 6 is provided in the cavity enclosed by the silicone encapsulation shell 3 and the flexible circuit board 1. The structure of the silicone encapsulation shell 3 and the light source protective cover 6 is similar to that in Embodiment 1, and will not be repeated here.

Example 4

As shown in FIG. 7, a number of LED light sources 5 are arranged in two rows on the flexible circuit board 1, and the cross section of the silicone encapsulation shell 3 is a continuous peak shape. Specifically, the light-transmitting surface of the silicone encapsulation shell 3 includes an arc-shaped light-transmitting surface protruding from the flexible circuit board 1 from the outer side of the LED light source 5 of one row, and the light-transmitting surface from the flexible circuit board 1 from the outer side of the LED light source 5 of another row. The outer convex arc-shaped light-transmitting surface, the two arc-shaped light-transmitting surfaces are connected to form a continuous peak-shaped structure, and the outside of the LED light source 5 is the side farther from the other row of LED light sources 5. The arc-shaped light-transmitting surface converges the light emitted by the LED light source 5 in the vertical direction of the extending direction of the light strip, which improves the lighting efficiency.

According to the technical solution provided by the present invention, in the first aspect, the flexible circuit board is soft, so that the shape of the lighting device is changeable and can adapt to the shape change of the car lamp; in the second aspect, the flexible circuit board integrated with the light source has at least two types of packages Among them, the split assembly method can reduce the packaging error rate and save costs, while the integrated packaging method improves the packaging accuracy; thirdly, the light source array can achieve timing and dynamic lighting effects under the control of the integrated control module , To create a flexible streamlined car lamp shape, enrich the visual effect of the car lamp.

The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including the combination of various technical features in any other suitable manner. These simple modifications and combinations should also be regarded as the disclosed content of the present invention. All belong to the protection scope of the present invention.

Claims

A vehicle lighting device, characterized in that the vehicle lighting device includes a flexible circuit board, a light source array, a silicone encapsulation shell and an integrated control module;

The light source array is integrated on one end surface of the flexible circuit board;

The silicone encapsulation shell is connected to the end surface of the flexible circuit board for encapsulating the light source array;

The integrated control module is electrically connected to the flexible circuit board, and is used to control the light source array on and off according to a set time sequence.
The vehicle lighting device according to claim 1, wherein a plurality of point light sources are arranged in at least one column at a certain interval along the extension direction of the flexible circuit board to form the light source array;

The light source array includes an independent point light source and a point light source group connected in series by a plurality of point light sources;

The integrated control module is configured to output a first control signal that drives the point light source to turn on and off in a time sequence and a second control signal that drives the point light source group to turn on and off in a time sequence.
The vehicle lighting device according to claim 2, wherein when the point light sources are arranged in a row along the extension direction of the flexible circuit board, the cross section of the silicone encapsulation shell is rectangular or peak-shaped;

When the point light sources are arranged in two or more columns along the extension direction of the flexible circuit board, the cross section of the silicone encapsulation shell is rectangular or continuous peak shape.
The vehicle lighting device according to claim 2 or 3, wherein the maximum distance between the emission centers of every two adjacent point light sources is 10-15 mm.
The vehicle lighting device according to claim 2 or 3, wherein the point light source is a light emitting diode (LED) or a light emitting chip;

The point light source is a monochromatic light source or a multi-color light source, and is used to realize multiple light distribution functions.
The vehicle lighting device of claim 1, wherein a light scattering agent is uniformly dispersed in the silicone encapsulation shell.
The vehicle lighting device according to claim 6, wherein the open end of the silicone encapsulation shell is fixed on the end surface of the flexible circuit board, and forms a cavity with the end surface of the flexible circuit board;

A light source protective cover is arranged in the cavity.
The vehicle lighting device according to claim 1, wherein the flexible circuit board integrated with the light source array is integrally packaged with silica gel, so that there is no gap between the silicone encapsulation shell and the light source array.
The vehicle lighting device according to claim 1, wherein the vehicle lighting device further comprises a light guide, and the light guide is installed on the light-emitting side of the light source array;

The light guide area of the light guide includes a light entrance surface and a light exit surface, and the light entrance surface of the light guide region can be provided with skin patterns or coated with a light scattering layer.
The vehicle lighting device according to claim 1, wherein the vehicle lighting device further comprises a heat dissipation bracket, and the heat dissipation bracket is disposed on the other end surface of the flexible circuit board facing away from the light source array.