This application claims the priority of China Patent Application No. 202011046942.5, filed on Sep. 29, 2020, which is hereby incorporated by reference in its entirety.
The present disclosure relates to a vehicle lighting device, and particularly relates to an automotive headlamp system. In addition, the present disclosure further relates to an automotive lamp with the automotive headlamp system.
A common automotive headlamp system is usually composed of passing beams, driving beams, front position lamps, front turning lights and daytime running lights (DRL). The passing beams and the driving beams are the main parts of headlamps, and the position lamps (PL), the turning lights (TL) and the DRL are signal lamps related to vehicle's safety.
The DRL is a forward-facing lamp that makes a vehicle more visible when the vehicle is running in the daytime. The front PL is a forward-facing signal lamp among the PLs, which is used for indicating the presence and approximate width of a vehicle. The TL is an important indicator lamp that is turned on when a vehicle turns to alert other vehicles and pedestrians in all directions (i.e., on the front, back, left and right of the vehicle).
At present, in the automotive headlamp system, the DRL, the front PL and the TL are usually independent of a driving beam module and a passing beam module, which increases the space volume of the headlamp, thus limiting the diversification of the modeling and design of automotive lamps. In addition, the structure is usually formed by the direct combination of a light-emitting diode (LED) light source and a light guide, which has a single form and function. As a result, an automotive lamp cannot be designed to be smaller in volume and more diversified in shape.
In a first aspect, the problem to be solved by the present disclosure is to provide an automotive headlamp system. The automotive headlamp system uses an automotive signal lamp structure to replace a signal lamp, which decreases the overall volume and satisfies requirements on the miniaturization of an automotive lamp.
In a second aspect, the problem to be solved by the present disclosure is to provide an automotive lamp. The automotive lamp uses an automotive signal lamp structure to replace a signal lamp, which decreases the overall volume and satisfies requirements on the miniaturization.
In order to achieve the above objective, an automotive headlamp system is provided in the first aspect of the present disclosure. The automotive headlamp system includes light sources, a primary optical element, an automotive signal lamp structure, and a secondary optical element, which are arranged in sequence along the light emitting direction. The automotive signal lamp structure includes a light-transmitting portion and a rotating shaft. The light-transmitting portion includes at least one light-transmitting plate. The light-transmitting plate is mounted on the rotating shaft and can be driven to rotate by the rotating shaft so that, by means of rotation, light from the light sources exits by means of the primary optical element, then selectively passes through one of the light-transmitting plates or does not pass through any one of the light-transmitting plates, and then is projected by means of the secondary optical element to achieve a corresponding signal lamp function or lighting function.
Preferably, the light-transmitting portion includes a plurality of light-transmitting plates, and the plurality of light-transmitting plates are different in material and/or shape.
Preferably, the light-transmitting portion includes a plurality of light-transmitting plates, and the plurality of light-transmitting plates are selected from one or more of flat plates and curved plates with curved light entering surfaces and/or curved light emitting surfaces.
Preferably, the light-transmitting portion includes two or three light-transmitting plates.
Preferably, a top of the rotating shaft is not higher than a bottom of the primary optical element, or a bottom of the rotating shaft is not lower than a top of the primary optical element.
Preferably, the primary optical element includes a light entering portion, a light guiding portion and a light emitting portion, which are arranged in sequence along the light emitting direction and are formed into a whole. The light entering portion includes a plurality of light condensing structures in one-to-one correspondence with the light sources. Convex cylinders in one-to-one correspondence with the light condensing structures are formed on the light emitting portion, and extend along an up-down direction.
Further preferably, the light condensing structures are light condensing cup structures.
Preferably, the secondary optical element includes a plurality of light entering surfaces and one light emitting surface. The plurality of light entering surfaces are formed as convex curved surfaces that are in one-to-one correspondence with the light sources and protrude towards the primary optical element. The light emitting surface is a smooth curved surface.
Further preferably, the light emitting surface is a smooth curved surface which is formed in such a way that a vertical generating line moves along a presetted curve. The vertical generating line is a convex curve protruding away from the primary optical element.
Preferably, the light sources are configured to be independently turned on and turned off.
An automotive lamp is provided in the second aspect of the present disclosure. The automotive lamp includes the above automotive headlamp system.
By means of the above technical solutions, the present disclosure has the following beneficial effects:
Specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
First of all, it should be noted that in the following descriptions, in order to clearly explain the technical solutions of the present disclosure, some orientation words, such as “up”, “down”, “left”, “right”, “front”, and “rear”, are all analogized according to normal orientations indicated by the vehicle when an automotive headlamp system is applied to the vehicle. For example, the orientation where a vehicle head is located refers to front, and the orientation where a vehicle tail is located refers to rear. According to Chinese driving habit, the orientation where a cab is located refers to left, and the orientation where an assistant driver seat is located refers to right, the orientation where vehicle's roof is located refers to top, and the orientation where wheels are located refers to bottom. The “light emitting direction” refers to an irradiating direction of emitted light of the automotive headlamp system, which can be set according to the lighting function of an automotive lamp to be realized. For example, the light emitting directions of low and driving beams point to the front of a vehicle, while the light emitting directions of cornering lamps slantways point to the outside of the vehicle. These descriptions are only used to facilitate the description of the present disclosure and simplify the description, instead of indicating or implying that the device or element indicated has to have specific orientations and be constructed and operated in specific orientations, and thus cannot be understood as limitations to the present disclosure.
In the description of the present disclosure, it should be noted that the term “mount” should be understood in a broad sense unless otherwise specified and limited. For example, it may be fixed connection, detachable connection, or integrated connection, or may be direct connection or indirect connection through an intermediate connector, or may be internal connection of two elements or interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.
As shown in
The rotating shaft 31 is driven to rotate in a drive manner in the existing technology, for example, a servo motor directly drives the rotating shaft 31 to rotate, which belongs to the prior art, is not an innovative point of the present application, and therefore will not be described in detail.
The light-transmitting plate 32 has certain light transmittance and light diffusion functions to make light meet the light intensity and uniformity requirements of a signal lamp. That is, the light-transmitting plate 32 is made of light-transmitting materials with certain light transmittance, for example, may employs traditional optical plastic such as PC (polycarbonate) and PMMA (polymethylmethacrylate). The light-transmitting plate 32 may also be made of light scattering materials (such as PC-based light scattering material or PMMA-based light scattering material). In order to make the automotive signal lamp structure to realize various signal lamp functions including a daytime running light, a front position lamp and a turning light, the light-transmitting portion includes a plurality of light-transmitting plates 32. The plurality of light-transmitting plates 32 are made of light-transmitting materials with different shapes and/or textures according to the light distribution requirements of different signal lamps (including light intensity requirements, light chromaticity requirements, etc.). The shape includes a thickness of the light-transmitting plate 32, shapes of a light entering surface and a light emitting surface, and other features. Specifically, the plurality of light-transmitting plates 32 are selected from one or more of flat plates as shown in
In order to achieve the functions of the three types of signal lamps, i.e., the daytime running light, the front position lamp and the turning light by using the automotive signal lamp structure, the light-transmitting portion preferably includes two or three light-transmitting plates 32. When two light-transmitting plates are used, the daytime running light and the front position lamp can share one light-transmitting plate 32 due to only different light intensity requirements. The functions of the daytime running light and the front position lamp can be realized by adjusting the luminous flux of the light sources. However, the turning light has different light chromaticity requirements from the daytime running light and the front position lamp, so that it is required to use a separate light-transmitting plate 32 with a different material to achieve the function of the turning light.
In order to ensure the light utilization rate of the automotive headlamp system, the location of the rotating shaft 31 is set as follows: a top of the rotating shaft 31 is not higher than a bottom of the primary optical element 1, or a bottom of the rotating shaft 31 is not lower than a top of the primary optical element 1, thereby ensuring that the above signal lamp structure does not shield emitted light of the primary optical element 1 when a lighting function is realized, and the emitted light of the primary optical element 1 can pass through the light-transmitting plates 32 when the functions of the signal lamps are realized. As shown in
In order to achieve a better lighting effect, as one preferable embodiment of the present disclosure, specifically, a primary optical element 1 includes a light entering portion, a light guiding portion 12 and a light emitting portion, which are arranged in sequence along the light emitting direction and are formed into a whole. The light entering portion includes a plurality of light condensing structures 11 that are in one-to-one correspondence with light sources. Convex cylinders 13 that are in one-to-one correspondence with the light condensing structures 11 are formed on the light emitting portion, and extend along an up-down direction. The light condensing structures 11 may be light condensing cup structures with external contours in a shape of a light condensing cup or may also be other structures with a light condensing function. The primary optical element 1 with this structure can form light spots with a smaller width to prevent mutual fusion of adjacent light spots and improve the resolution of a light shape. Light emitted from the light sources is converged and collimated by the light condensing structures 11, and is then transmitted by the light guiding portion 12 to the corresponding convex cylinders 13. The light around is converged by the convex cylinders 13, is then emitted to the secondary optical element 2, and is projected by the secondary optical element 2 to form light spots corresponding to the light sources. A plurality of light spots are arranged and stacked to form a light shape.
The secondary optical element 2 includes a plurality of light entering surfaces 21 and one light emitting surface 22. The plurality of light entering surfaces 21 are formed as convex curved surfaces that are in one-to-one correspondence with the light sources and protrude towards the primary optical element 1. The light emitting surface 22 is a smooth curved surface, which may be, for example, a smooth curved surface which is formed in such a way that a vertical generating line moves along a presetted curve. The vertical generating line is a convex curve protruding away from the primary optical element, and is a longitudinal sectional line of the light emitting surface 22. The shapes of the vertical bus and the set curve can be formed according to a modeling requirement for an automotive lamp. Each light entering surface 21 and the light emitting surface 22 form an optical structure having a focal point, which functions like a convex lens.
In a second aspect of the present disclosure, an automotive lamp is provided, and includes the above automotive headlamp system.
It should be noted that the above automotive signal lamp structure of the present disclosure can not only be used in the automotive headlamp system with a small-sized light emitting window as shown in
One preferred embodiment of applying the automotive signal lamp structure of the present disclosure to a driving beam module is described below.
As shown in
The driving beam module has four working states: As shown in
From the above description, it can be seen that the present disclosure has the following advantages: The light-transmitting plates 32 mounted on the rotating shaft 31 are directly arranged behind the secondary optical element 2 to replace the signal lamps in the prior art, thereby reducing the space occupied by the original signal lamps, decreasing the volume of a headlamp, and satisfying requirements on the miniaturization of an automotive lamp. In addition, the primary optical element 1 including the light condensing structures and the convex cylinders 13 can form light spots with the smaller width to prevent mutual fusion between adjacent light spots and improve the resolution of the light shape. Meanwhile, a novel signal lamp structure is provided. The plurality of light-transmitting plates 32 having different materials and/or different shapes are arranged, so that the same one automotive signal lamp structure can realize the functions of various signal lamps, which further decreases the volume of the headlamp. The light emitting surface 22 of the secondary optical element 2 is arranged in the manner of the smooth curved surface, so that the light emitting surface 22 of the secondary optical element 2 can be designed to be a curved surface adapting to the shape of a vehicle.
The preferred embodiments of the present disclosure are described above in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the foregoing embodiments. Various simple variations can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple variations all fall within the protection scope of the present disclosure.
In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combination modes will not be additionally described in the present disclosure.
In addition, various different embodiments of the present disclosure can also be optionally combined, and these combinations should also be regarded as the content disclosed in the present disclosure, as long as they do not violate the idea of the present disclosure.
Number | Date | Country | Kind |
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202011046942.5 | Sep 2020 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2021/115668 | 8/31/2021 | WO |