Automobile lamp lighting module and automobile lamp

Abstract

A vehicle lamp illumination module comprises a primary optical unit (1), a bifocal optical element (2) and a collimating optical element (3), the primary optical unit (1) comprises a light source (11) and a condensing element (12), the bifocal optical element (2) has a first focal point (F1) and a second focal point (F2), light emitted by the light source (11) can form a primary light distribution in the first focal point (F1) region of the bifocal optical element (2) after being converged by the condensing element (12), or form a primary light distribution projected to the bifocal optical element (2) after being collimated by the condensing element (12), the bifocal optical element (2) can convert the primary light distribution to a secondary light distribution in the second focal point (F2) region of the bifocal optical element (2), the second focal point (F2) of the bifocal optical element (2) is arranged in the focal point (F) region of the collimating optical element (3), and the collimating optical element (3) can project the secondary light distribution to form an illumination light shape. The vehicle lamp illumination module has small position limitation on the primary optical unit (1), and the module structure can be flexibly arranged according to the design requirements of the vehicle lamp.

Description

Technical Field

[0001] This invention relates to vehicle lights, specifically, to a vehicle light illumination module. This invention also relates to a vehicle light. Background Technology

[0002] Vehicle lighting modules are categorized by function into high beam modules, low beam modules, and integrated high / low beam modules. They can also be classified by their light pattern formation principle into reflective and projective modules. Projective modules typically consist of a light source, an ellipsoidal reflector, and a collimating lens. In low beam modules, a light shield is placed near the focal point of the collimating lens to create a low beam pattern with a cutoff line (the upper boundary of the lighting pattern). In integrated high / low beam projective modules, an actuator typically switches the position of the light shield to create separate high and low beam patterns.

[0003] Adaptive high-beam modules typically use multiple matrix-arranged light sources and corresponding primary optical elements to form multiple illumination spots. These spots are then superimposed side-by-side to create the high-beam illumination pattern. The brightness of each light source can be independently controlled, allowing for control of the brightness of corresponding spot areas and thus adaptive high-beam illumination. However, existing adaptive high-beam modules, due to their complex optical path structure, generally only provide high-beam illumination. Their limited optical path arrangement makes integration with low-beam modules for low-beam illumination difficult. When low-beam functionality is required, a light-shielding plate must be added to the optical path. An actuator switches the position of this plate to achieve the switching between high and low beam illumination patterns.

[0004] In existing automotive lighting modules, the second focal point of the ellipsoidal reflector in reflective lighting modules is located in the focal region of the collimating lens; the light-emitting surface of the primary optical element in transmissive lighting modules is located in the focal region of the lens. In modules capable of low beam illumination, the light shield must also be placed near the focal point of the collimating lens. This results in a large number of optical components located in the focal region of the collimating lens, and the different primary optical units and their formed optical paths interfere with each other, limiting the position and number of primary optical units in the automotive lighting module. Furthermore, the light shield located near the focal point of the collimating lens can easily obstruct the high beam path, affecting the illumination effect of the high beam area. In integrated high and low beam lighting modules, the position of the light shield needs to be switched via a mechanical structure, which not only has a low switching speed and poor switching stability but also generates significant switching noise. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a vehicle lighting module that has less restriction on the position of the primary optical unit and high flexibility in module structure.

[0006] The technical problem to be solved by the present invention is to provide a vehicle lamp with a flexible structure that can be equipped with a variety of functional modules.

[0007] To address the aforementioned technical problems, this invention provides a vehicle lighting module, comprising a primary optical unit, a bifocal optical element, and a collimating optical element. The primary optical unit includes a light source and a focusing element. The bifocal optical element has a first focal point and a second focal point. Light emitted from the light source can be converged by the focusing element to form a primary light distribution in the first focal region of the bifocal optical element, or collimated by the focusing element to form a primary light distribution projected onto the bifocal optical element. The bifocal optical element can convert the primary light distribution to the second focal region of the bifocal optical element to form a secondary light distribution. The second focal point of the bifocal optical element is located in the focal region of the collimating optical element, and the collimating optical element can project the secondary light distribution to form an illumination beam pattern.

[0008] Preferably, the focusing element is a parabolic reflector, and the light source is disposed in the focal region of the parabolic reflector. The parabolic reflector can collimate the light emitted by the light source to form a primary light distribution, which is then projected onto the bifocal optical element. In this preferred embodiment, the light emitted from the focal region of the parabolic reflector is reflected by the reflector to form parallel reflected light rays, reducing the limitation on the distance between the focusing element and the bifocal optical element and improving the flexibility of the module configuration.

[0009] More preferably, the parabolic mirror has a parabolic cutoff line structure at its edge, and this structure is located in the first focal region of the bifocal optical element. With this preferred embodiment, the parabolic cutoff line structure at the edge of the parabolic mirror forms the reflection boundary of the mirror, ensuring that the primary light distribution after reflection has a corresponding boundary. After conversion by the bifocal optical element and projection by the collimating optical element, a near-light beam with a clear cutoff line is formed.

[0010] Preferably, the light-gathering element is an ellipsoidal reflector, the light source is disposed at one focal region of the ellipsoidal reflector, and the other focal region of the ellipsoidal reflector is disposed at the first focal region of the bifocal optical element. The light emitted by the light source can be converged by the ellipsoidal reflector to form a primary light distribution in the first focal region of the bifocal optical element. In this preferred embodiment, the ellipsoidal reflector has two focal points, which can converge light emitted from one focal region to the other, resulting in better light convergence and a clearer illumination pattern.

[0011] More preferably, the vehicle headlight illumination module further includes a light shield, wherein one edge of the light shield is provided with a light shield cutoff line structure, and the light shield cutoff line structure is located in another focal area of ​​the ellipsoidal reflector. Through this preferred technical solution, the light shield can block the light emitted by the light source in the focal area of ​​the ellipsoidal reflector, forming a clear low-beam illumination pattern with a clear cutoff line.

[0012] Preferably, the focusing element is a transparent light guide focusing element, and the light source is disposed in the light-incident surface area of ​​the transparent light guide focusing element. The light emitted by the light source can be focused by the transparent light guide focusing element to form a primary light distribution in the first focal region of the bifocal optical element. In this preferred embodiment, the transparent light guide focusing element can collect the light emitted by the light source in the light-incident surface area, and after transmission by the transparent light guide, it is emitted from the light-exit surface. The transparent light guide focusing element can better confine the introduced light within the light guide body of the transparent light guide focusing element, and can reduce the mutual interference between light emitted by different light sources.

[0013] More preferably, a light-collecting cutoff line structure is formed on one side boundary of the light-emitting surface of the transparent light guide focusing element, and the light-collecting cutoff line structure is disposed in the first focal region of the bifocal optical element. With this preferred technical solution, when light is emitted from the light-emitting surface of the transparent light guide focusing element, the light-collecting cutoff line structure can block the light emitted from the light-emitting surface, forming a near-light beam pattern of light and dark cutoff lines.

[0014] Preferably, there are multiple light sources and focusing elements, each of which can collect the light emitted by its corresponding light source, forming a primary light distribution in the first focal region of the bifocal optical element. Through this preferred technical solution, the light emitted by multiple light sources can be collected by their respective focusing elements and form a light distribution in the first focal region of the bifocal optical element. The light distributions formed by the light emitted by multiple light sources combine to form a complete primary light distribution. This complete primary light distribution is then converted by the bifocal optical element and projected by the collimating optical element to form an illumination pattern. The light distribution formed by the light emitted by each light source can form an illumination spot (or pixel) within the illumination pattern. Multiple illumination spots combine to form the illumination pattern, thereby increasing its brightness and expanding its illumination area. Alternatively, the light distribution formed by the light emitted by each light source can also form an illumination spot covering the entire illumination area. Multiple illumination spots superimpose to form an illumination pattern with higher brightness. The light emitted by multiple light sources can also form different types of illumination patterns, which can be switched by controlling the emission state of the light sources.

[0015] More preferably, the bifocal optical element includes a low-beam bifocal optical element and a high-beam bifocal optical element, the light source includes a low-beam light source and a high-beam light source, and the focusing element includes a low-beam focusing element and a high-beam focusing element. The low-beam focusing element can collect the light emitted by the low-beam light source, forming a primary low-beam light distribution in the first focal region of the low-beam bifocal optical element, and after conversion by the low-beam bifocal optical element and projection by the collimating optical element, a low-beam light pattern is formed. The high-beam focusing element can collect the light emitted by the high-beam light source, forming a primary high-beam light distribution in the first focal region of the high-beam bifocal optical element, and after conversion by the high-beam bifocal optical element and projection by the collimating optical element, a high-beam light pattern is formed. In this preferred technical solution, the vehicle headlight illumination module is provided with a low-beam primary optical unit, a low-beam bifocal optical element, a high-beam primary optical unit, and a high-beam bifocal optical element, thus simultaneously providing low-beam and high-beam illumination functions. Because a bifocal optical element can convert the primary light distribution in the first focal region to the second focal region, forming a secondary light distribution, the second focal point can be set on the optical axis of the collimating optical element (the focal region of the collimating optical element), while the first focal point is set outside the optical axis of the collimating optical element. Therefore, the bifocal optical element can be set entirely outside the optical axis of the collimating optical element. This allows the vehicle headlight lighting module of the present invention to simultaneously set a low beam primary optical unit, a low beam bifocal optical element, a high beam primary optical unit, and a high beam bifocal optical element, forming a low beam lighting module and a high beam lighting module, respectively. This makes the vehicle headlight lighting module of the present invention an integrated high and low beam lighting module, and can prevent mutual interference between the low beam lighting module, the high beam lighting module, and the high and low beam optical paths within the module. The vehicle headlight lighting module of the present invention can also set multiple bifocal optical elements and corresponding focusing elements, which can also prevent mutual interference between multiple bifocal optical elements, light sources, focusing elements, and the optical paths they form. Multiple bifocal optical elements and primary optical units can form multiple different lighting modules, which can not only form multiple lighting areas in the lighting pattern, but also form multiple different types of lighting patterns, such as low beam lighting pattern, high beam lighting pattern, low beam widening lighting pattern, ADB high beam lighting pattern, etc., enriching the functionality of the vehicle lighting module of this invention. The light distribution formed by each focusing element can be concentrated in the first focal area of ​​the bifocal optical element. The lighting pattern formed after conversion by the bifocal optical element and projection by the collimating optical element is clearer. Multiple bifocal optical elements convert the light distribution formed by different focusing elements, making the control of secondary light distribution and the final lighting pattern more flexible.

[0016] Preferably, the bifocal optical element is an ellipsoidal mirror with an ellipsoidal or near-ellipsoidal reflective surface. In this preferred embodiment, the distance between the two focal points of the ellipsoidal or near-ellipsoidal reflective surface of the ellipsoidal mirror and the positions of the two focal points are flexibly set, which allows for convenient setting of the relative positions between the primary optical unit, the bifocal optical element, and the collimating optical element.

[0017] As a preferred embodiment, the bifocal optical element is a convex lens or a lens group. In this preferred embodiment, using a convex lens or a lens group as the bifocal optical element results in a simpler structure and lower cost.

[0018] A second aspect of the present invention provides a vehicle lamp that uses the vehicle lamp lighting module provided in the first aspect of the present invention.

[0019] Through the above technical solution, in the vehicle lighting module of the present invention, the divergent light emitted by the light source is converged or collimated by the focusing element, forming a primary light distribution in the first focal region of the bifocal optical element. The bifocal optical element converts this primary light distribution to the second focal region, which is the focal region of the collimating optical element, forming a secondary light distribution. The collimating optical element projects the secondary light distribution to form the illumination beam pattern. The second focal point of the bifocal optical element is set in the focal region of the collimating optical element, and the first focal point can be set outside the optical axis of the collimating optical element. This allows both the primary optical unit and the bifocal optical element of the vehicle lighting module of the present invention to be set outside the optical axis of the collimating optical element, overcoming the limitation in traditional vehicle lighting modules that require the light source and primary optical element to be set near the optical axis of the collimating optical element, and improving the flexibility of the primary optical unit setting. Because the primary optical unit and the bifocal optical element can be positioned outside the optical axis of the collimating optical element, they can be placed at different locations within the headlight module. This allows for the placement of multiple primary optical units and bifocal optical elements relative to a single collimating optical element in the headlight module of this invention. Furthermore, the light emitted from each primary optical unit can converge at the focal region of the collimating optical element. This avoids mutual interference between different primary optical units, bifocal optical elements, and their illumination paths, while ensuring the clarity of the resulting illumination beam. The headlight module of this invention offers fewer restrictions on the placement of optical units, greater structural flexibility, and the ability to achieve more functions. Headlights using the headlight module of this invention also possess the aforementioned advantages.

[0020] Other technical features and effects of the present invention will be further described in the detailed embodiments below. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the optical path principle of an embodiment of the vehicle lighting module of the present invention; Figure 2 This is a schematic diagram of one embodiment of the vehicle lighting module of the present invention; Figure 3 This is a schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 4 yes Figure 3 Schematic diagram of the optical path; Figure 5 yes Figure 3 Exploded view of the parts; Figure 6 This is a low-beam light pattern screen illuminance diagram formed by an embodiment of the vehicle headlight illumination module of the present invention; Figure 7 This is a high beam pattern screen illuminance diagram formed by an embodiment of the vehicle headlight lighting module of the present invention; Figure 8 This is an illuminance diagram of the combined high and low beam light pattern screen formed by an embodiment of the vehicle lighting module of the present invention; Figure 9 This is a schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 10 This is a cross-sectional structural schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 11 This is a schematic diagram of the low beam optical path of another embodiment of the vehicle headlight lighting module of the present invention; Figure 12 This is a schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 13 This is a cross-sectional structural schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 14 This is a schematic diagram of the low beam optical path of another embodiment of the vehicle headlight lighting module of the present invention; Figure 15 This is a schematic diagram of the low beam optical path of another embodiment of the vehicle headlight lighting module of the present invention; Figure 16 This is a schematic diagram of the optical path principle of another embodiment of the vehicle lighting module of the present invention; Figure 17 This is a schematic diagram of another embodiment of the vehicle lighting module of the present invention; Figure 18 yes Figure 17 Schematic diagram of the optical path; Figure 19 yes Figure 17 A partial structural diagram; Figure 20 This is a schematic diagram of yet another embodiment of the vehicle lighting module of the present invention; Figure 21 This is a schematic diagram of another embodiment of the vehicle lighting module of the present invention.

[0022] Explanation of reference numerals in the attached figures Detailed Implementation

[0023] In this invention, unless otherwise stated, the directional terms such as "front," "rear," "up," "down," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship of the vehicle lighting module of this invention after it is normally installed on the vehicle. The direction indicated by the directional term "front" is the direction in which the vehicle is normally traveling. The description of the orientation or positional relationship of the vehicle lighting module, the vehicle lights, and their components of this invention is consistent with their actual installation orientation in use.

[0024] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the stated features.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," or "connection" should be interpreted broadly. For example, the term "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] 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 herein are only for illustration and explanation of the present invention, and the scope of protection of the present invention is not limited to the specific embodiments described below.

[0027] like Figures 1 to 21As shown, one embodiment of the vehicle lighting module of the present invention includes a primary optical unit 1, a bifocal optical element 2, and a collimating optical element 3. The primary optical unit 1 includes a light source 11 and a focusing element 12. The focusing element 12 is an optical element capable of collecting light emitted from the light source 11 and forming a certain light distribution. Specifically, the focusing element 12 can be a parabolic reflector with a parabolic or quasi-parabolic reflector, an ellipsoidal reflector with an ellipsoidal or quasi-ellipsoidal reflector, a transparent light guide focusing element, a convex lens, or a lens group, or a possible combination of the above optical elements. A quasi-parabolic reflector is a reflective surface with similar function to a parabolic reflector formed by adaptive adjustments to the parabolic reflector. Adjustments to the parabolic reflector can adjust the reflection direction of the local reflector to adjust the light distribution formed by the reflected light. The bifocal optical element 2 is an optical element with a first focal point F1 and a second focal point F2. Specifically, the bifocal optical element 2 can be an ellipsoidal reflector with an ellipsoidal or near-ellipsoidal reflective surface, a convex lens, a lens group with two focal points, or other possible optical elements or groups of optical elements with two focal points. A near-ellipsoidal reflective surface refers to a reflective surface that is adaptively adjusted based on an ellipsoidal reflective surface to adjust the reflection direction and light distribution of its local reflective surface, forming a reflective surface with a function similar to an ellipsoidal reflective surface. Depending on the type of focusing element 12 used, the light source 11 is positioned at different relative positions to the focusing element 12, enabling the focusing element 12 to collect the light emitted by the light source 11. The light source 11 preferably uses an LED light-emitting chip or other surface light source. A heat sink 6 can also be provided for the light source H to reduce the temperature of the light source 11 during operation. The light emitted by the light source 11, after refraction and / or reflection by different types of focusing elements 12, forms different light distributions. The ellipsoidal reflector, transparent light guide, convex lens, or lens group can converge the light emitted from the light source 11 to the first focal point F1 region of the bifocal optical element 2, forming a primary light distribution in the first focal point F1 region of the bifocal optical element 2. The parabolic reflector can collimate the light emitted from the light source 11, forming a parallel primary light distribution that is projected onto the bifocal optical element 2. The bifocal optical element 2 can converge the primary light distribution converged to the first focal point F1 region by the light-concentrating element 12, or the primary light distribution projected by the light-concentrating element 12 after reflection or refraction, to the second focal point F2 region of the bifocal optical element 2, forming a secondary light distribution located in the second focal point F2 region of the bifocal optical element 2 after conversion by the bifocal optical element 2.The second focal point F2 of the bifocal optical element 2 is located in the focal point F region of the collimating optical element 3. Thus, the secondary light distribution is also located in the focal point F region of the collimating optical element 3. The collimating optical element 3 can amplify and project the secondary light distribution in the focal point F region, forming a clear illumination pattern. The collimating optical element 3 can be a parabolic mirror with a parabolic or near-parabolic reflective surface, or it can be a convex lens or lens group. When a convex lens or lens group is selected for the collimating optical element 3, it can be mounted on the lens holder 5. The optical axis of the collimating optical element 3 refers to its axis of symmetry. When light rays travel along the optical axis of the collimating optical element 3 towards it, after transmission or reflection by the collimating optical element 3, the light rays still propagate along their original straight lines. If the collimating optical element 3 is a parabolic mirror, its optical axis is a straight line passing through the focal point F of the mirror and perpendicular to the tangent plane at the point of maximum curvature of the reflecting surface of the parabolic mirror. If the collimating optical element 3 is a convex lens or lens group, its optical axis is a straight line passing through the two focal points of the convex lens or lens group. The second focal point F2 of the bifocal optical element 2 is located in the focal point F region of the collimating optical element 3, that is, on the optical axis of the collimating optical element 3. The first focal point F1 of the bifocal optical element 2 can be located on or outside the optical axis of the collimating optical element 3. Since the bifocal optical element can convert the primary light distribution located in the first focal point F1 region to form a secondary light distribution in the second focal point region, the bifocal optical element 2 and the primary optical unit 1 can be located outside the optical axis of the collimating optical element 3, so that the light distribution formed by the primary optical unit 1 can be converted to the second focal point F2, that is, the focal point F region of the collimating optical element 3, thus not affecting the clarity of the formed illumination beam. Since the traditional vehicle lighting module no longer has the restriction that the light source and primary optical elements must be placed near the optical axis of the collimating lens, the optical element arrangement in the vehicle lighting module of the present invention is more flexible. Multiple primary optical units 1 and bifocal optical elements 2 can be arranged in different positions outside the optical axis of the collimating optical element 3 without worrying about the mutual influence between different primary optical units 1, bifocal optical elements 2 and their associated structures, or interference with the optical path formed by other optical elements, thus improving the flexibility of module function settings.

[0028] In some embodiments of the vehicle lighting module of the present invention, such as Figures 2 to 5 and Figures 17 to 21As shown, the focusing element 12 can be a parabolic reflector. The light source 11 is located in the focal region of the parabolic reflector. The light emitted by the light source 11 is reflected by the parabolic reflector to form parallel collimated rays. These collimated rays form a primary light distribution based on the light emitted by the light source 11, which is projected onto the bifocal optical element 2. After reflection / refraction by the bifocal optical element 2, a secondary light distribution is formed in the second focal region F2 of the bifocal optical element 2. The reflecting surface of the parabolic reflector can be located in the first focal region of the bifocal optical element 2.

[0029] As a specific embodiment of the vehicle lighting module of the present invention, such as Figures 2 to 5 and Figure 21 As shown, a parabolic cutoff line structure 121 is provided on one edge of the reflecting surface of the parabolic mirror. The parabolic cutoff line structure 121 is located in the first focal point F1 region of the bifocal optical element 2. When the light emitted from the light source 11 shines on the parabolic mirror, the parabolic cutoff line structure 121 forms a reflection boundary for the light. Thus, after the light emitted from the light source 11 is reflected by the parabolic mirror, a bright and dark cutoff line corresponding to the shape of the parabolic cutoff line structure 121 is formed on one side of the formed light distribution. After conversion by the bifocal optical element 2 and projection by the collimating optical unit 3, a light distribution is formed as shown in the figure. Figure 6 The image shows the near-beam illumination pattern with a clear cutoff line between light and dark.

[0030] In some embodiments of the vehicle lighting module of the present invention, such as Figures 9 to 11 As shown, the focusing element 12 is an ellipsoidal reflector. The light source 11 is located at one focal region of the ellipsoidal reflector, and the other focal region of the ellipsoidal reflector is located at the first focal region F1 of the bifocal optical element 2. The light emitted by the light source 11 is reflected by the ellipsoidal reflector and converges to the other focal region of the ellipsoidal reflector, which is the first focal region F1 of the bifocal optical element 2, forming a primary light distribution.

[0031] As a specific embodiment of the vehicle lighting module of the present invention, such as Figures 9 to 11 As shown, the vehicle headlight illumination module of the present invention also includes a light shield 4. A light shield cutoff line structure 41 is provided on one edge of the light shield 4. The position of the light shield 4 is such that the light shield cutoff line structure 41 is located in the other focal region of the ellipsoidal reflector, that is, the first focal region F1 of the bifocal optical element 2. When the light emitted by the light source 11 is reflected by the focusing element 12 and then shines into the other focal region of the ellipsoidal reflector, the light shield 4 blocks the passing light. After conversion by the bifocal optical element 2 and projection by the collimating optical element 3, the light finally forms as shown in the figure. Figure 6The image shows a low beam illumination pattern with a light and dark cutoff line corresponding to the shape of the light shield cutoff line structure 41. Compared with conventional vehicle headlight illumination modules, since the light shield 4 is located in the first focal point F1 region of the bifocal optical element 2, the primary light distribution with the light and dark cutoff line formed is transferred to the focal region of the collimating optical element 3 through the bifocal optical element 2. Since the first focal point F1 of the bifocal optical element 2 is usually offset from the optical axis of the collimating optical element 3, the light shield 4 can be located far from the optical axis of the collimating optical element 3, increasing the flexibility of optical element placement and avoiding interference with other optical elements in the module and the light path they form.

[0032] In some embodiments of the vehicle lighting module of the present invention, such as Figures 12 to 14 As shown, the focusing element 12 is a transparent light guide focusing element. The transparent light guide focusing element can be a traditional focusing structure formed by a transparent light conductor, or any other structure formed by a transparent light conductor capable of collecting, conducting, and outputting light. The transparent light guide focusing element has an incident surface for collecting light emitted from the light source. This incident surface can be a plane or curved surface located at one end of the transparent light guide focusing element, or it can be part of the incident structure located on the transparent light guide focusing element. The light source 11 is located in the incident surface region of the transparent light guide focusing element, so that more light emitted from the light source 11 can enter the transparent light guide focusing element, be transmitted through the transparent light guide focusing element, and exit from the exiting surface of the transparent light guide focusing element. The exiting surface of the transparent light guide focusing element can be located in the first focal point F1 region of the bifocal optical element 2, so that the light emitted from the exiting surface of the transparent light guide focusing element can form a primary light distribution in the first focal point F1 region of the bifocal optical element 2.

[0033] As a specific embodiment of the vehicle lighting module of the present invention, such as Figures 12 to 14 As shown, a light-collecting cutoff line structure 122 is formed on one side boundary of the light-emitting surface of the transparent light guide focusing element. The light-collecting cutoff line structure 122 is located in the first focal point F1 region of the bifocal optical element 2. The focal region mentioned in this specification refers to the location of the focal point and its adjacent focal points. After the light emitted from the light source 11 is collected and transmitted by the transparent light guide focusing element, when it is emitted from the light-emitting surface of the transparent light guide focusing element, the light-collecting cutoff line structure 122 blocks the light on one side. After being converted by the bifocal optical element 2 and projected by the collimating optical element 3, the light finally forms as shown in the figure. Figure 6 The image shown is a near-beam illumination pattern with a light and dark cutoff line corresponding to the shape of the light-concentrating cutoff line structure 122.

[0034] In some embodiments of the vehicle lighting module of the present invention, such as Figures 2 to 5 , Figures 9 to 15 , Figure 20 and Figure 21As shown, the vehicle lighting module of the present invention includes multiple primary optical units 1, that is, multiple light sources H and multiple focusing elements 12. Specifically, at least two primary optical units 1 can be provided. Each primary optical unit 1 may include a light source 11 and a corresponding focusing element 12. When a transparent light guide focusing element is selected as the focusing element 12, one primary optical unit 1 includes a transparent light guide focusing element. One or more light incident surfaces may be provided on the transparent light guide focusing element, and one or more light sources 11 are provided in each light incident surface area, so that one primary optical unit 1 may include multiple light sources 11. Each focusing element 12 can collect the light emitted by its corresponding light source 11, and can form a primary light distribution in the first focal point F1 area of ​​the bifocal optical element 2. After the primary light distribution is converted by the bifocal optical element 2 and projected by the collimating optical element 3, an illumination light pattern is formed. The multiple primary optical units 1 can all be low beam primary optical units, or all be high beam primary optical units, or some can be low beam primary optical units and some can be high beam primary optical units. When the vehicle headlight illumination module of the present invention has multiple low-beam primary optical units, the primary light distribution formed by each primary optical unit is converted by the bifocal optical element 2, and the resulting secondary light distribution is superimposed and / or combined in the focal region of the collimating optical element 3, and then projected out by the collimating optical element 3 to form a low-beam beam. Since the light shield in a traditional low-beam module needs to be placed in the focal region of the collimating optical element, all low-beam light sources and low-beam optical elements can only be placed on the upper side of the light shield, i.e., above the focal point of the collimating optical element. However, in the vehicle headlight illumination module of the present invention, since the bifocal optical element 2 can convert the primary light distribution at different positions to the focal region of the collimating optical element 3, multiple low-beam primary optical units can be placed at different positions outside the optical axis of the collimating optical element 3, either above or below the optical axis, thereby arranging more low-beam primary optical systems within a limited space. When the vehicle headlight illumination module of the present invention has multiple high beam primary optical units, the primary light distributions formed by the multiple high beam primary optics can be superimposed and / or combined after being converted by the bifocal optical element 2 and projected by the collimating optical element 3 to form a normal high beam illumination pattern. They can also be combined to form a matrix-arranged set of illumination areas to achieve the ADB high beam function. In the vehicle headlight illumination module of the present invention, since both the light source 11 and the focusing element 12 can be positioned outside the optical axis of the collimating optical element 3, multiple light sources 11 and multiple focusing elements 12 can be arranged at different positions around the optical axis of the collimating optical element 3 without interference. When a structure such as a light-shielding plate 4 is provided to form a cutoff line, this structure is positioned on the optical path of each focusing element 12, thereby moving away from the optical axis region of the collimating optical element 3 and avoiding the influence of the structure used to form the cutoff line on the optical paths formed by other light sources 11.Of course, in a vehicle lighting module with multiple primary optical units 1, one primary optical unit 1 can be positioned on the optical axis of the collimating optical element 3, while the other primary optical units 1 are positioned outside the optical axis of the collimating optical element 3. This can also avoid mutual interference between different primary optical units 1 and their optical paths. In some embodiments of the vehicle lighting module of the present invention, such as... Figures 2 to 5 , Figures 9 to 15 , Figure 20 and Figure 21 As shown, the bifocal optical element 2 includes a near-beam bifocal optical element and a far-beam bifocal optical element. These two elements can be independent or interconnected to form a single optical element. The light source 11 includes a near-beam light source and a far-beam light source, and there can be multiple of each. The focusing element 12 includes a near-beam focusing element and a far-beam focusing element, and there can also be multiple of each. Each near-beam focusing element can correspond to one or more near-beam light sources, and each far-beam focusing element can correspond to one or more far-beam light sources. The far-beam light source and the far-beam focusing element constitute a far-beam primary optical unit, and the near-beam light source and the near-beam focusing element constitute a near-beam primary optical unit. The near-beam primary optical unit also includes a light-shielding plate 4, or a cutoff line structure on the near-beam focusing element. The light emitted from the near beam source is converged or collimated by the near beam focusing element, and then blocked by the light shield 4 or the cutoff line structure on the near beam focusing element, forming a primary near beam light distribution with bright and dark cutoff lines. The near beam bifocal optical element can convert the primary near beam light distribution to the second focal region, that is, the focal region F of the collimating optical element 3, forming a secondary near beam light distribution. The collimating optical element 3 then amplifies the secondary near beam light distribution and projects it out, forming a light distribution such as... Figure 6 The image shows the near-beam shape with a cutoff line. The light emitted from the high-beam source is converged or collimated by the high-beam focusing element to form the primary high-beam light distribution. The high-beam bifocal optical element can convert the primary high-beam light distribution to the second focal region, which is the focal region F of the collimating optical element 3, forming the secondary high-beam light distribution. The collimating optical element 3 then amplifies and projects the secondary high-beam light distribution, forming the image shown. Figure 7 The high beam pattern is shown. At this point, the vehicle headlight module of the present invention forms an integrated high and low beam headlight module. In this module, when the low beam source and the high beam source emit light simultaneously, the low beam pattern and the high beam pattern combine to form a pattern as shown. Figure 8The high and low beam combined light pattern is shown. By controlling the on / off state of different light sources 11, the lighting pattern formed by the vehicle headlight lighting module of the present invention can be easily switched between low beam, high beam, and combined high and low beam light patterns. In the vehicle headlight lighting module of the present invention, due to the setting of the dual-focus optical element 2, both the low beam primary optical unit and the high beam primary optical unit can be set in the optical axis region far away from the collimating optical element 3, avoiding mutual interference between the low beam primary optical unit and the high beam primary optical unit. When a light shield 4 is included, since the light shield 4 is also set in the region far away from the focal point F of the collimating optical element 3, it can avoid the formation of a dark area at the junction of the high beam and low beam light patterns in the combined high and low beam light pattern caused by the light shield 4 blocking the high beam light path, thus improving the driver's visual experience. Multiple bifocal optical elements 2 can be provided. When the number of bifocal optical elements 2 is greater than two, the multiple bifocal optical elements 2 are usually arranged in a matrix. Specifically, the multiple bifocal optical elements 2 can be arranged in a rotation matrix along a certain rotation axis, or in a straight matrix along a certain direction, or in a combination of a rotation matrix along a certain rotation axis and a straight matrix along a certain direction. Multiple primary optical units 1 can also be provided, wherein each focusing element 12 corresponds to one or more light sources H, and each bifocal optical element 2 corresponds to one or more focusing elements 12. Each focusing element 12 can collect the light emitted by its corresponding light source 11, forming a primary light distribution in the first focal point F1 region of its corresponding bifocal optical element 2. The multiple primary optical units 1 can be arranged in a rotation matrix along a certain rotation axis toward the bifocal optical unit 2, or in a straight matrix along a certain direction, or in a combination of a rotation matrix along a certain rotation axis and a straight matrix along a certain direction. Since the bifocal optical element 2 can also be positioned outside the optical axis of the collimating optical element 3, multiple bifocal optical elements 2 can be positioned around the optical axis of the collimating optical element 3 without interference, further improving the flexibility of the light source 11 and the focusing element 12, and ensuring that the primary light distribution formed by each light source 11 is located in the first focal point F1 region of the bifocal optical element 2, thus improving the clarity of the secondary light distribution after conversion by the bifocal optical element 2. Similarly, one of the multiple bifocal optical elements 2 can be positioned on the optical axis of the collimating optical element 3, while the other bifocal optical elements 2 are positioned outside the optical axis of the collimating optical element 3. This also avoids mutual interference between different bifocal optical elements 2, their corresponding primary optical units 1, and their optical paths. After the primary light distribution formed by multiple primary optical units 1 is converted by multiple bifocal optical elements 2, it is projected out by the collimating optical element 3, which can not only form multiple illumination areas in the illumination pattern, but also form multiple different types of illumination patterns, such as near beam illumination pattern, high beam illumination pattern, near beam broadening illumination pattern, ADB high beam illumination pattern, etc.Different types of lighting patterns can also be combined to meet the lighting needs of vehicles in different states.

[0035] In some embodiments of the vehicle lighting module of the present invention, such as Figures 1 to 5 , Figures 9 to 15 and Figure 21 As shown, the bifocal optical element 2 is a bifocal mirror with an ellipsoidal or quasi-ellipsoidal reflective surface. Both the ellipsoidal and quasi-ellipsoidal reflective surfaces have two focal points. Light rays emitted from one focal region are reflected by the ellipsoidal or quasi-ellipsoidal reflective surface and converge to the other focal region. Therefore, light rays from one focal region can be focused into another focal region, forming a light distribution in the other focal region. Either focal point can be designated as the first focal point F1, and the other as the second focal point F2, completing the conversion of light emitted from the light source 11 from the first focal point F1 to the second focal point F2.

[0036] In some embodiments of the vehicle lighting module of the present invention, such as Figures 16 to 20 As shown, the bifocal optical element 2 is a convex lens or lens group. Each convex lens or lens group has a focal point on both sides, giving it two focal points. Light rays emitted from one focal area are refracted by the convex lens or lens group and converge to the other focal area. This allows light rays from one focal area to be focused into another, forming a light distribution in the other focal area. Either focal point can be designated as the first focal point F1, and the other as the second focal point F2, completing the conversion of light rays emitted from the light source H from the first focal point F1 to the second focal point F2. However, when using a single convex lens as the bifocal optical element 2, the light rays refracted by the convex lens generally propagate along the optical axis of the convex lens, limiting the distance between the first focal point F1 of the bifocal optical element 2 and the optical axis of the collimating optical element 3. This somewhat affects the flexibility of the module setup.

[0037] The vehicle lighting module provided by this invention can form a primary light distribution through a primary optical unit 1, and convert the primary light distribution to the second focal region F2, which is the focal region F of the collimating optical element 3, through a bifocal optical element 2, to form a secondary light distribution. The secondary light distribution is then projected out by the collimating optical element 3 to form an illumination pattern. Since the second focal region F2 of the bifocal optical element 2 is located in the focal region of the collimating optical element 3, that is, on the optical axis of the collimating optical element 3, while the first focal region F1 of the bifocal optical element 2 is located outside the optical axis of the collimating optical element 3, the primary optical unit 1 and the bifocal optical element 2 can be located outside the optical axis of the collimating optical element 3, and a light distribution can still be formed in the focal region F of the collimating optical element 3, ensuring the position and clarity of the illumination pattern formed after projection by the collimating optical element 3. Unlike traditional automotive lighting modules where the primary optical unit needs to be positioned near the optical axis of the collimating optical element, the primary optical unit 1 and the bifocal optical element 2 in this invention's lighting module can both be positioned away from the optical axis of the collimating optical element 3. Therefore, the positions of the primary optical unit 1 and the bifocal optical element 2 can be freely set according to different design requirements of the automotive light, improving the flexibility of their placement. In this invention's lighting module, the primary optical unit 1 and its resulting primary light distribution can both be positioned away from the optical axis of the collimating optical element 3, avoiding interference between different primary optical units 1. When a light-shielding plate 4 is provided in the primary optical unit 1, the light-shielding plate 4 is positioned between the corresponding focusing element 12 and the bifocal optical element 2, without interfering with other primary optical units 1 or bifocal optical elements 2, thus increasing the freedom of the cutoff line structure setting. In a preferred embodiment of the vehicle lighting module of the present invention, multiple different light sources 11, focusing elements 12, and bifocal optical elements 2 are arranged at different positions around the optical axis of the collimating optical element 3. Each light source 11, focusing element 12, and bifocal optical element 2 can form an illumination pattern or a part of an illumination pattern, enriching the functionality of the vehicle lighting module of the present invention and avoiding mutual interference between different light sources 11, focusing elements 12, and bifocal optical elements 2. The vehicle lighting module of the present invention has fewer restrictions on the position of optical units in the module, and the structural arrangement is more flexible, allowing the vehicle lighting module to be arranged according to design requirements, realizing more illumination patterns, and enabling more convenient and effective switching between different light patterns.

[0038] The vehicle lamp of the present invention, which uses the vehicle lamp lighting module of any embodiment of the present invention, also has the above-mentioned advantages.

[0039] In the description of this invention, references to terms such as "one embodiment," "some embodiments," and "a specific implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A vehicle lighting module, characterized in that, The system includes a primary optical unit (1), a bifocal optical element (2), and a collimating optical element (3). The primary optical unit (1) includes a light source (11) and a focusing element (12). The bifocal optical element (2) has a first focal point (F1) and a second focal point (F2). The light emitted by the light source (11) can be focused by the focusing element (12) to form a primary light distribution in the first focal point (F1) region of the bifocal optical element (2), or collimated by the focusing element (12) to form a primary light distribution projected onto the bifocal optical element (2). The bifocal optical element (2) can convert the primary light distribution to the second focal point (F2) region of the bifocal optical element (2) to form a secondary light distribution. The second focal point (F2) of the bifocal optical element (2) is located in the focal region of the collimating optical element (3). The collimating optical element (3) can project the secondary light distribution to form an illumination pattern. The bifocal optical element (2) includes a near-beam bifocal optical element and a far-beam bifocal optical element. The light source (11) includes a near-beam light source and a far-beam light source. The focusing element (12) includes a near-beam focusing element and a far-beam focusing element. The near-beam focusing element can collect the light emitted by the near-beam light source to form a near-beam primary light distribution. After conversion by the near-beam bifocal optical element and projection by the collimating optical element (3), it forms a near-beam light pattern. The far-beam focusing element can collect the light emitted by the far-beam light source to form a far-beam primary light distribution. After conversion by the far-beam bifocal optical element and projection by the collimating optical element (3), it forms a far-beam light pattern. The first focal point (F1) of the near-beam bifocal optical element and the first focal point (F1) of the far-beam bifocal optical element are both located outside the optical axis of the collimating optical element (3), so that the near-beam bifocal optical element and the far-beam bifocal optical element are located outside the optical axis of the collimating optical element (3), and the near-beam bifocal optical element and the far-beam bifocal optical element are connected together to form an integrated optical element.

2. The vehicle lighting module according to claim 1, characterized in that, The focusing element (12) is a parabolic reflector, and the light source (11) is located in the focal area of ​​the parabolic reflector. The parabolic reflector can collimate the light emitted by the light source (11) to form a primary light distribution and project it onto the bifocal optical element (2).

3. The vehicle lighting module according to claim 2, characterized in that, The edge of the parabolic mirror is provided with a parabolic cutoff line structure (121), which is located in the first focal point (F1) region of the bifocal optical element (2).

4. The vehicle lighting module according to claim 1, characterized in that, The light-concentrating element (12) is an ellipsoidal reflector. The light source (11) is located in one focal region of the ellipsoidal reflector. The other focal point of the ellipsoidal reflector is located in the first focal (F1) region of the bifocal optical element (2). The light emitted by the light source (11) can be converged by the ellipsoidal reflector and form a primary light distribution in the first focal region of the bifocal optical element (2).

5. The vehicle lighting module according to claim 4, characterized in that, It also includes a light-shielding plate (4), on one side edge of which a light-shielding plate cutoff line structure (41) is provided, and the light-shielding plate cutoff line structure (41) is provided in another focal region of the ellipsoidal reflector.

6. The vehicle lighting module according to claim 1, characterized in that, The light-concentrating element (12) is a transparent light-concentrating element. The light source (11) is disposed in the light-incident surface area of ​​the transparent light-concentrating element. The light emitted by the light source (11) can be converged by the transparent light-concentrating element to form a primary light distribution in the first focal area of ​​the dual-focal optical element (2).

7. The vehicle lighting module according to claim 6, characterized in that, A light-emitting surface of the transparent light guide is provided with a light-emitting cut-off line structure (122) on one side boundary. The light-emitting cut-off line structure (122) is located in the first focal point (F1) region of the bifocal optical element (2).

8. The vehicle lighting module according to any one of claims 1 to 7, characterized in that, There are multiple light sources (11) and multiple light-concentrating elements (12). Each light-concentrating element (12) can collect the light emitted by its corresponding light source (11) and form a primary light distribution in the first focal point (F1) region of the bifocal optical element (2).

9. The vehicle lighting module according to any one of claims 1 to 7, characterized in that, The bifocal optical element (2) is an ellipsoidal reflector with an ellipsoidal or near-ellipsoidal reflective surface.

10. The vehicle lighting module according to any one of claims 1 to 7, characterized in that, The bifocal optical element (2) is a convex lens or a lens group.

11. A vehicle light, characterized in that, Includes the vehicle lighting module according to any one of claims 1 to 10.

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