CN116897259A

CN116897259A - Lighting device for car lamp and car lamp thereof

Info

Publication number: CN116897259A
Application number: CN202180094029.9A
Authority: CN
Inventors: 陈佳缘; 张洁; 周浩; 董世琨; 桑文慧; 祝贺
Original assignee: HASCO Vision Technology Co Ltd
Current assignee: HASCO Vision Technology Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-10-17
Also published as: WO2023097462A1

Abstract

A lighting device (1, 1', 1", 1"', 1"", 1""', 1""", 1"""') and a vehicle lamp including the lighting device, the lighting device (1, 1', 1", 1"', 1"", 1""', 1""", 1"""') includes: a light source (10) comprising a plurality of LED units (101), the plurality of LED units (101) being arranged side by side in a linear arrangement direction and being independently controllable; a primary optical system (20) having a reflective surface (201, 2020), the reflective surface (201, 2020) being configured to reflect light emitted by the light source (10); and a collimating optical system (30) configured to project light reflected by the reflecting surface (201, 2020) and to emit the projected light forward of the vehicle lamp, wherein the light source (10) is disposed at a focal line of the reflecting surface (201, 2020), the light emitted by the light source (10) forms a primary spot via reflection by the reflecting surface (201, 2020), and wherein a focal point of the collimating optical system (30) is disposed on the reflecting surface (201, 2020) to image the primary spot to form an irradiation light shape.

Description

Lighting device for car lamp and car lamp thereof

Technical Field

The present application relates generally to lighting devices for vehicle lamps. The application also relates to a vehicle lamp comprising the lighting device.

Background

This section provides background information related to the application, but such information does not necessarily constitute prior art.

Recently, there is an increasing demand for safety of vehicles, and lighting technology for lamps is continuously improved, and an adaptive high beam (ADB, adaptive Driving Beam) system for lamps is toughed by being able to avoid glare to other vehicles on the road. The ADB system is a car light illumination system for detecting road surface vehicle information through a camera or other sensors, and after analysis and processing, adaptively converting a high beam shape according to a vehicle position in a front view of a vehicle so as to control an illumination area and prevent glaring to other road users.

In the related art, there are various types of vehicle headlamps having an ADB system that includes a light source, a main optical unit for collecting light emitted from the light source and generating a light distribution on a light output surface of the main optical unit, and a secondary optical unit for projecting the light distribution to image on a road in front of a vehicle and illuminate an area in front of the vehicle, wherein the ADB system automatically captures the position of other road users, and dims or extinguishes the light source of the corresponding position to avoid glare to the other road users, ensuring driving safety of the vehicle.

Disclosure of Invention

This section provides a general summary of the application, and is not a comprehensive disclosure of its full scope or all of its features.

The inventors of the present application have noted that in the application of the ADB technology of the currently known head lamp, there is a dark area in the light distribution of the matrix ADB light shape formed on the road by the light rays emitted from the light source through the main optical unit, the secondary optical unit, and the like, that is, the formed light distribution is not uniform, so that the driving safety of the vehicle is not sufficiently high. In addition, the lamp system of the related art is composed of a plurality of optical devices, each of which causes light loss due to transmittance and fresnel reflection on the incident surface and the exit surface, so that the more the optical devices, the more the light loss, the more unstable the optical performance, and the more complicated the installation, and the higher the requirement for assembly accuracy.

In addition, in a known matrix ADB system, the ADB system is composed of a plurality of primary optical systems and light sources correspondingly arranged in combination with secondary optical systems, each primary optical system forms a light spot, and the plurality of primary optical systems form a plurality of adjacent light spots, so as to form an ADB light pattern. The turning on and off of each spot can be controlled by individually turning on and off a controllable light source. In this solution, the primary optical system is limited in the width of the reflecting surface, i.e. the width cannot be too small, and the rectangular profile has sides ranging from 3mm to 15mm, thereby limiting the number of primary optical systems not too much. In addition, based on this scheme, when the respective light sources are turned off, light remains in the corresponding dark areas formed, and this portion of light is called invalid light, since invalid light exists on both sides of the spot formed via the plurality of primary optical systems. The presence of ineffective light makes the antiglare effect poor, thereby affecting the driving safety of the vehicle.

Accordingly, there is room for improvement in ADB systems to address at least one or all of the above problems.

Exemplary embodiments of the present application provide a lighting device for a vehicle lamp, which may include: a light source including a plurality of LED units arranged side by side in an arrangement direction in a straight line and capable of being independently controlled; a primary optical system having a reflective surface configured to reflect light emitted by the light source; and a collimating optical system configured to project light reflected by the reflecting surface and to emit the projected light forward of the vehicle lamp, wherein the light source is disposed at a focal line of the reflecting surface, the light emitted by the light source forms a primary spot via reflection by the reflecting surface, and wherein a focal point of the collimating optical system is disposed on the reflecting surface to image the primary spot to form an irradiation light shape.

In some alternative embodiments, the plurality of LED units (101) may be arranged in one row or n rows, wherein n+.2, when the plurality of LED units are arranged in one row, the pitch in the arrangement direction of the plurality of LED units is the minimum process pitch, and when the plurality of LED units are arranged in n rows, the pitch in the arrangement direction of the plurality of LED units (101) is the minimum process pitch or n-1 times the light emitting surface width of each LED unit.

In some alternative embodiments, the plurality of LED units may share a reflective surface.

In some alternative embodiments, the plurality of LED units may be divided into two or more groups, and the collimating optical system may include a convex lens or a lens group or a parabolic reflecting surface, which may be disposed in such a manner that each of the two or more groups of the plurality of LED units corresponds to one convex lens or lens group or parabolic reflecting surface, respectively.

In some alternative embodiments, the plurality of LED units may be divided into two or more groups, and a plurality of reflection surfaces may be provided in such a manner that each of the two or more groups of the plurality of LED units corresponds to one reflection surface.

In some alternative embodiments, the collimating optical system may include a convex lens or a lens group or a parabolic reflecting surface, which may be disposed in such a manner that each of the two or more groups of the plurality of LED units corresponds to one convex lens or lens group or parabolic reflecting surface, respectively.

In some alternative embodiments, the reflective surface of the primary optical system may be a concave curved surface.

In some alternative embodiments, the reflective surface of the primary optical system may be a unidirectionally stretched concave curved surface.

In some alternative embodiments, the reflecting surface of the primary optical system may be a unidirectional stretching concave curved surface formed by unidirectional stretching a parabolic or ellipsoidal line along a straight line.

In some alternative embodiments, the reflecting surface of the primary optical system may be a unidirectional stretching concave curved surface formed by unidirectional stretching a fold line having a shape similar to a parabola or an ellipsoid along a straight line.

In some alternative embodiments, the distance between the focal length of the parabola, or the near focus of the ellipsoid, and the vertex of the ellipsoid near the near focus may be between 0.1mm and 10 mm.

In some alternative embodiments, the distance between the focal length of the parabola, or the near focus of the ellipsoid, and the vertex of the ellipsoid near the near focus may be between 1mm and 3 mm.

In some alternative embodiments, the stretching direction of the unidirectional stretching concave curved surface may coincide with the arrangement direction of the plurality of LED units.

In some alternative embodiments, the reflective surface of the primary optical system may be formed by a metal plating.

In some alternative embodiments, the reflective surface of the primary optical system may be formed by the fully reflective surface of the transparent photoconductor.

Exemplary embodiments of the present application also provide a vehicle lamp including the lighting device provided according to the foregoing embodiments.

According to the illumination device for a vehicle lamp of the present application, by disposing the light source at the focal line of the reflecting surface and disposing the focal point of the collimating optical system on the reflecting surface, it is possible to ensure that the illumination light shape projected and formed in front of the vehicle lamp has uniform illumination illuminance without substantially having a clear bright light area and/or dark area corresponding to the disposition of the light source. In addition, by setting the proper focal length or other shape parameters of the reflecting surface, the formed irradiation light shape ensures that the requirements of the current national standard LED headlamps (GB 25991-2010) on illumination intensity of the LED headlamps and the self-adaptive front illumination system (GB/T30036-2013 ECE R123) on ADB function are met under the condition of ensuring uniform light distribution characteristics.

Drawings

Features and advantages of embodiments of the application will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale, and some features are exaggerated or reduced to show details of particular components, in which:

Fig. 1 is a schematic perspective view showing a lighting device for a vehicle lamp according to an exemplary embodiment of the present application;

fig. 2 is a schematic side view showing a lighting device for a vehicle lamp according to an exemplary embodiment of the present application;

fig. 3 is a screen illuminance map when a single LED unit of a light source of a lighting device according to an exemplary embodiment of the present application is lighted;

fig. 4 is a screen illuminance map when all LED units of a light source of a lighting device according to an exemplary embodiment of the present application are lighted;

fig. 5 is a screen illuminance diagram when an LED unit in the middle of a light source of a lighting device according to an exemplary embodiment of the present application is turned off and the remaining LED units are turned on;

fig. 6 is a schematic perspective view showing a lighting device for a vehicle lamp according to another exemplary embodiment of the present application;

fig. 7 is a schematic perspective view showing a lighting device for a vehicle lamp according to still another exemplary embodiment of the present application;

fig. 8 is a schematic perspective view showing a lighting device for a vehicle lamp according to still another exemplary embodiment of the present application;

fig. 9 is a schematic perspective view showing a lighting device for a vehicle lamp according to still another exemplary embodiment of the present application;

Fig. 10 is a schematic perspective view showing a lighting device for a vehicle lamp according to still another exemplary embodiment of the present application;

fig. 11 to 16 are screen illuminance diagrams respectively showing when different individual LED units of a group of LED units of a light source of a lighting device according to an exemplary embodiment of the present application are lit and the remaining LED units are extinguished;

fig. 17 is a screen illuminance diagram showing when all LED units in a group of LED units of a light source of a lighting device according to an exemplary embodiment of the present application are lighted;

fig. 18 to 22 are screen illuminance diagrams respectively showing when different individual LED units of another group of LED units of a light source of a lighting device according to an exemplary embodiment of the present application are turned on and the remaining LED units are turned off;

fig. 23 is a screen illuminance diagram showing when all LED units in another group of LED units of a light source of a lighting device according to an exemplary embodiment of the present application are lighted;

fig. 24 is a screen shot diagram showing when all LED units of two groups of LED units of a light source of a lighting device according to an exemplary embodiment of the present application are lighted;

fig. 25 is a schematic assembled perspective view showing a lighting device for a vehicle lamp according to another exemplary embodiment of the present application;

Fig. 26 is a schematic exploded perspective view showing a lighting device for a vehicle lamp according to an exemplary embodiment of the present application; and

fig. 27 is a schematic perspective view showing a lighting device for a vehicle lamp according to still another exemplary embodiment of the present application.

Detailed Description

The application will be described in detail below with the aid of exemplary embodiments of the application with reference to the accompanying drawings. It should be noted that the following detailed description of the present application is for illustrative purposes only and is not intended to be limiting. Furthermore, the same reference numerals are used to denote the same parts throughout the various figures.

It should also be noted that, for the sake of clarity, not all features of an actual particular implementation are described and shown in the specification and drawings, and, in addition, in order to avoid unnecessary detail from obscuring the technical solutions of interest to the present application, only arrangements closely related to the technical content of the present application are described and shown in the specification and drawings, while other details not greatly related to the technical content of the present application and known to those skilled in the art are omitted.

Next, a lighting device for a vehicle lamp according to an exemplary embodiment of the present application will be described in detail with reference to the accompanying drawings.

A lighting device for a vehicle lamp according to an exemplary embodiment of the present application will be described first with reference to fig. 1 and 2. Fig. 1 and 2 show schematic views of a lighting device for a vehicle lamp according to an exemplary embodiment of the present application.

As shown in fig. 1 and 2, an illumination device 1 for a vehicle lamp as an exemplary embodiment of the present application may include a light source 10, a primary optical system 20, and a collimating optical system 30.

In the illustrated exemplary embodiment, the light source 10 may include a plurality of LED units 101. The plurality of LED units 101 may be arranged side by side in an arrangement direction in a straight line. Each of the plurality of LED units 101 can be independently controlled to light up or dim or go out. When other road users are detected on the vehicle running road, a part of the plurality of LED units 101 located at a position corresponding to the road user may be dimmed or extinguished to reduce the illumination of the illumination light shape in the area where the road user exists, thereby avoiding glare to the road user and ensuring driving safety.

In some embodiments of the present application, the plurality of LED units 101 may be arranged in one row or n rows, where n≡2, the pitch in the arrangement direction of the plurality of LED units 101 may be the minimum process pitch when the plurality of LED units 101 are arranged in one row, and the pitch in the arrangement direction of the plurality of LED units 101 may be the minimum process pitch or n-1 times the light emitting surface width of each LED unit when the plurality of LED units 101 are arranged in n rows. In some embodiments, the minimum process spacing may be distributed between 0.01mm and 0.05mm depending on the different processing processes. As an example and not by way of limitation, the plurality of LED units 101 may be arranged in three rows, and the pitch in the arrangement direction of the plurality of LED units 101 may be 2 times the light emitting surface width of each LED unit.

In an exemplary embodiment of the present application, the light source 10 may be disposed on the mounting device 40, and the light source 10 may be mounted in place in the vehicle lamp by the mounting device 40. In embodiments of the present application, the mounting device 40 may employ any suitable device known in the art, such as a circuit board.

In some alternative embodiments, the light source 10 may be a conventional halogen lamp, a xenon lamp, or a laser lamp.

In an exemplary embodiment of the present application, the primary optical system 20 may have a reflective surface 201. The reflective surface 201 may be configured to reflect light emitted by the light source 10.

In an exemplary embodiment of the present application, all the LED units 101 as the light source 10 may share one reflective surface 201.

In some optional embodiments of the present application, the plurality of LED units may be divided into two or more groups, and a plurality of reflection surfaces may be provided in such a manner that each of the two or more groups of LED units corresponds to one reflection surface.

As shown in fig. 1 and 2, in the illustrated exemplary embodiment, a plurality of LED units 101 as a light source 10 may be arranged in a row, and the pitch in the arrangement direction of the plurality of LED units 101 is the minimum process pitch, so that the distance between the plurality of LED units 101 is as small as possible, thereby ensuring that corresponding light spots formed by the plurality of LED units are sequentially joined, so that the formed irradiation light shape has uniform illumination intensity.

In the exemplary embodiment shown, the reflective surface 201 of the primary optical system 20 may be configured as a concave curved surface, preferably a unidirectionally stretched concave curved surface. The plurality of LED units 101 arranged side by side in a straight line share one reflecting surface 201 in the form of a unidirectional stretching concave curved surface.

In the present application, the term "unidirectionally stretched concave curved surface" refers to a curved surface formed by unidirectionally stretching a concave curve or a folding line along a straight line.

In alternative embodiments, the direction of stretching of the concave curve or fold line may coincide with the direction of arrangement of the light sources 10.

It should be noted that, in the present application, when two directions are described as "coincident", it should be understood that: the two directions are parallel or substantially parallel.

According to some exemplary embodiments of the present application, the concave curve used to form the unidirectional stretching concave curve may be a parabola or an ellipsoid, in which case the reflecting surface 201 of the primary optical system 20 may be a unidirectional stretching concave curve formed by unidirectional stretching the parabola or ellipsoid along a normal direction of a plane in which the parabola or ellipsoid is located. According to some exemplary embodiments of the present application, the folding line for forming the unidirectional stretching concave curved surface may be a folding line formed by connecting a plurality of line segments each having an end point on the same parabola or ellipsoid as the shape of the parabola or ellipsoid, and in this case, the reflection surface 201 of the primary optical system 20 may be a unidirectional stretching concave curved surface formed by unidirectional stretching the folding line having the shape similar to the parabola or ellipsoid along the normal direction of the plane of the folding line.

In the exemplary embodiment shown in fig. 1 and 2, the reflective surface 201 of the primary optical system 20 is a unidirectionally stretched concave curved surface formed by unidirectionally stretching a parabolic or ellipsoidal line along a normal direction of a plane in which the parabolic or ellipsoidal line lies.

In an exemplary embodiment of the present application, the light source 10 may be disposed at a focal line of the reflective surface 201 of the primary optical system 20, and the light emitted by the light source 10 may form a primary spot via reflection of the reflective surface 201. In some embodiments of the present application, the optical axis of the light source 10, i.e., the light emitting direction of the light source 10, such as the normal direction of the light emitting surface of the light emitting chip of the LED unit 101, is disposed toward the reflective surface 201. In an alternative embodiment, the optical axis of the light source 10 forms an angle of 60 degrees to 120 degrees with the light emitting direction of the reflecting surface 201, and preferably, the optical axis of the light source 10 is perpendicular to the light emitting direction of the reflecting surface 201.

In embodiments where the unidirectionally stretched concave curved surface forming the reflecting surface 201 is a parabolic concave curve and a fold line having a shape similar to a parabola, the light emitting surface of the light source 10 may be disposed at the focal point of the parabola when viewed along the stretching direction of the reflecting surface 201. In the embodiment in which the unidirectional stretching concave curved surface forming the reflection surface 201 is an ellipsoidal concave curved surface and a fold line having a shape similar to that of the ellipsoidal line, the light emitting surface of the light source 10 may be disposed at a near focus of the ellipsoidal line when viewed along the stretching direction of the reflection surface 201.

In embodiments where the unidirectionally stretched concave curved surface forming the reflecting surface 201 is a parabolic concave curve and a fold line having a shape similar to a parabola, the focal length of the parabola may be set between 0.1mm and 10mm, preferably between 1mm and 3 mm. In embodiments where the unidirectionally stretched concave curved surface forming the reflecting surface 201 is an ellipsoidal concave curve and a fold line shaped like an ellipsoidal line, the distance between the near focus of the ellipsoidal line and the vertex of the ellipsoidal line near the near focus may be set to between 0.1mm and 10mm, preferably between 1mm and 3 mm. However, it should be noted that the shape parameters of the parabolas and ellipsoids are not limited thereto, and other suitable settings may be employed according to the actual needs to form the desired light shape.

In some preferred embodiments, the reflective surface 201 of the primary optical system 20 may be formed by a metal plating film. In some embodiments, the reflective surface 201 may be formed by coating aluminum onto a concave surface of a unidirectional-drawn concave curved surface using an aluminum deposition technique. It should be noted, however, that the implementation of the reflective surface 201 is not limited thereto, and that any suitable technique may be used to coat a suitable metal onto the concave surface of the unidirectional-drawn concave curved surface to form the reflective surface 201.

It will be appreciated that the primary optical system 20 of the lighting device for a vehicle lamp according to the present application may be formed by a plane mirror.

In the exemplary embodiment of the present application, after the light emitted from the light source 10 is reflected by the reflecting surface 201, the light is projected forward of the lamp via the collimating optical system 30 of the lighting device 1, thereby forming a desired irradiation light shape on a road in front of the vehicle (for example, as shown in fig. 4).

In an exemplary embodiment of the present application, the collimating optical system 30 of the illumination device 1 may be arranged such that the focal point of the collimating optical system 30 is located on the reflecting surface 201 to image the primary spot, thereby forming an illumination light shape. In a preferred embodiment, the focal point of the collimating optical system 30 may be arranged on the reflecting surface 201 at a position close to the light source 10, preferably at a position on the reflecting surface 201 of 1mm to 5mm from the edge of the reflecting surface 201 located closer to the light source 10. In some embodiments of the present application, the optical axis of the collimating optical system 30 is parallel to or forms an angle with the light emitting direction of the reflecting surface 201, and the angle may be determined according to that most of the light reflected by the reflecting surface 201 can be irradiated to the collimating optical system 30 and then irradiated to the road surface after passing through the collimating optical system 30.

In an exemplary embodiment of the present application, the collimating optical system 30 may include a convex lens or a lens group.

In some alternative embodiments, all the LED units 101 as the light source 10 may share one convex lens or lens group.

In other alternative embodiments, a plurality of convex lenses or lens groups may be provided in such a manner that each of the two or more groups of LED units corresponds to one convex lens or lens group, respectively.

In an embodiment of the present application, the lens group may include a combination of a concave lens and a convex lens. The lens group may include two or more lenses.

Referring to fig. 2, in the illustrated exemplary embodiment, the collimating optical system 30 may be formed of a single convex lens 301. In an exemplary embodiment of the present application, the convex lens 301 of the collimating optical system 30 may be disposed such that the optical axis of the convex lens 301 is perpendicular to the arrangement direction of the plurality of LED units 101. In the embodiment of the present application, the convex lens 301 of the collimating optical system 30 may be disposed with respect to the reflecting surface 201 of the primary optical system 20: such that the focal point of the convex lens 301 is disposed on the reflecting surface 201, so that the light reflected by the reflecting surface 201 is projected forward of the lamp via the convex lens 301 to form a desired irradiation light shape in front of the lamp, as shown in fig. 2.

In the lighting device 1 for a vehicle lamp according to the exemplary embodiment of the present application, by disposing the light source 10 at the focal line of the reflecting surface 201 in the form of the unidirectional-stretching concave curved surface, the lights reflected by the reflecting surface 201 are substantially parallel to each other in the plane of the concave curve forming the unidirectional-stretching concave curved surface of the reflecting surface 201. Further, by setting the focal point of the collimating optical system 30 on the reflecting surface 201, the light reflected by the reflecting surface 201 is projected via the collimating optical system 30 as parallel outgoing light substantially parallel to the main optical axis. Thus, in the embodiment of the present application, by the above-described configuration in which the light source 10 is disposed at the focal line of the reflecting surface 201 and the focal point of the collimating optical system 30 is disposed on the reflecting surface 201 at a position close to the light source 10, it is possible to ensure that the irradiation light shape projected and formed in front of the vehicle lamp has uniform illumination illuminance without substantial presence of a strong light region and/or a dark region corresponding to the disposition of the light source, as shown in fig. 4.

Furthermore, by setting the focal length of the parabola forming the unidirectional stretching concave curved surface, or the distance between the near focus of the ellipsoidal line and the vertex of the ellipsoidal line near the near focus, so that the light source 10 is arranged as close as possible to the reflecting surface 201 of the primary optical system, it is ensured that the irradiation light pattern projected in front of the lamp has an appropriate illumination illuminance for the LED headlamp in the current national standard LED headlamp for automobiles (GB 25991-2010), and the requirements for ADB function in the adaptive front illumination system for automobiles (GB/T30036-2013 ece r 123). In addition, according to the exemplary embodiment of the present application, all the LED units of the light source 10 share one reflecting surface 201 in the form of a one-way stretch concave curved surface, and thus, in the corresponding light spots formed by the LED units of the light source 10 according to the exemplary embodiment of the present application, the light spots are rectangular light spots with well-defined both side boundaries, compared to the case where a plurality of reflecting means are provided, and thus, there is no excessive light, i.e., no ineffective light, in the corresponding dark area formed when the corresponding LED units are extinguished, thereby improving the antiglare effect. In addition to this, while an improved antiglare effect can be obtained, reflection of light emitted from the light source is achieved by only the single reflection surface 201, and projection of the reflected light is achieved by only the convex lens 301, so that the structure of the illumination device 1 according to the embodiment of the present application is simple.

Next, light distribution characteristics of an irradiation light shape projected and formed by the lighting device 1 according to the exemplary embodiment of the present application in front of a vehicle lamp will be described in detail with reference to fig. 3 to 5.

Fig. 3 is a screen illuminance map when a single LED unit of the light source 10 of the lighting device 1 according to an exemplary embodiment of the present application is lighted. Fig. 4 is a screen illuminance map when all LED units of the light source 10 of the lighting device 1 according to the exemplary embodiment of the present application are lighted. Fig. 5 is a screen illuminance map when the LED unit in the middle of the light source 10 of the lighting device 1 according to the exemplary embodiment of the present application is turned off and the remaining LED units are turned on.

As described above, due to the innovative arrangement of the light source 10, the primary optical system 20, and the collimating optical system 30 in the illumination device 1 according to the present application, the light emitted by the LED units 101 of the light source 10 forms a primary light spot via reflection by the reflecting surface 201 of the primary optical system 20, and the primary light spot is imaged by the convex lens 30 of the collimating optical system 30, and the images formed by the adjacent primary light spots at least partially overlap, so that when all the LED units of the light source 10 of the illumination device 1 according to the exemplary embodiment of the present application are lit, an illumination light shape having a uniform screen illuminance is formed in front of the vehicle lamp, as shown in fig. 4. The illumination light shape formed when a single LED unit of the illumination device 1 according to the exemplary embodiment of the present application is lighted is shown in fig. 3. As shown, the width of the light distribution of the formed irradiation light shape is D1. When the LED units of the light source 10 of the lighting device 1 are independently controlled such that the middle LED unit is turned off and the remaining LED units are turned on according to the exemplary embodiment of the present application, an irradiation light shape as shown in fig. 5, in which an anti-glare dark area having a width D2 exists in the formed irradiation light shape corresponding to the turned-off LED units, will be formed in front of the vehicle lamp. In some embodiments, D2 is about half D1. However, it should be noted that the relationship of D2 and D1 is not limited thereto. For example, D2 may be one third of D1 or the like by controlling the interval between adjacent light sources 10 such that adjacent light sources 10 are arranged closer to each other.

With the above arrangement according to an exemplary embodiment of the present application, since the light distributions formed by the respective LED units of the light source at least partially overlap, there is substantially no distinct dark area among the light distributions of the entire irradiation light shape formed when all the LED units are lit up, i.e., a uniform light distribution is achieved.

In this way, in the case where other road users are detected, the anti-glare dark area generated when a part of the LED units of the lighting device 1 at the corresponding positions is dimmed or extinguished can be relatively small, compared to the ADB system in the known related art, so that the visual blind area of the driver is reduced, improving the driving safety of the vehicle. It follows that the lighting device 1 according to the exemplary embodiment of the present application can achieve uniform light distribution with a simple structure, so that the driving safety of the vehicle is better.

In the embodiment of the present application, one of a parabola and an ellipsoid may be selected as a concave curve forming a unidirectional stretching concave curved surface according to actual design requirements, and parameters of the parabola or the ellipsoid, such as a focal length and the like, may be adjusted to achieve a desired irradiation light shape and light distribution characteristics thereof, and to form an appropriate cutoff line. Further, in some embodiments, the shape of the illumination light projected in front of the lamp and its light distribution characteristics can be adjusted by controlling the curvature of the concave curve or changing the angle of the optical axis of the light source 10 with the reflecting surface 201. In addition, in some alternative embodiments, the position of the focal point of the collimating optical system 30 may be controlled to change the irradiation light shape projected and formed in front of the lamp and the light distribution characteristics thereof, and as an example, the position of the focal point of the collimating optical system 30 may be adjusted to be located in front of or behind the reflecting surface 201.

Hereinafter, a lighting device for a vehicle lamp according to some alternative exemplary embodiments of the present application will be described.

Referring to fig. 6, fig. 6 is a schematic perspective view showing a lighting device 1' for a vehicle lamp according to another exemplary embodiment of the present application.

The lighting device 1' according to the embodiment shown in fig. 6 differs from the previously described lighting device 1 according to the exemplary embodiment shown in fig. 1, for example, in the arrangement of the collimating optical system 30. Only the differences between the lighting device 1' and the lighting device 1 will be described below, and the same reference numerals will be used for the same constituent parts between the two embodiments and detailed description thereof will be omitted.

In the exemplary embodiment shown in fig. 6, the collimating optical system 30 may be formed by a parabolic reflecting surface 302. In the illustrated embodiment, the light emitted from the light source 10 is reflected by the reflecting surface 201 of the primary optical system 20, and then reflected by the parabolic reflecting surface 302 of the collimator optical system 30, and emitted to the front of the vehicle lamp.

In an exemplary embodiment of the present application, the parabolic reflecting surface 302 of the collimating optical system 30 may be arranged with respect to the reflecting surface 201 of the primary optical system 20: so that the focal point of the parabolic reflecting surface 302 is disposed on the reflecting surface 201.

According to an exemplary embodiment of the present application, a parabolic reflecting surface 302 may be provided to face the reflecting surface 201 to ensure that light reflected by the reflecting surface 201 is reflected toward the front of the lamp, as shown in fig. 6.

In some alternative embodiments, the reflective surface 302 of the collimating optical system 30 may be formed as a unidirectionally stretched concave curved surface in the same manner as the reflective surface 201 of the primary optical system 20, but the embodiment of the reflective surface 302 is not limited thereto.

In an embodiment in which the reflection surface 302 of the collimating optical system 30 is formed as a unidirectionally stretched concave curved surface in the same manner as the reflection surface 201 of the primary optical system 20, the reflection surface 302 of the collimating optical system 30 may be disposed such that: the normal direction of the plane on which the concave curve of the unidirectional stretching concave curved surface forming the reflection surface 302 is located is perpendicular to the arrangement direction of the plurality of LED units 101.

Since the focal point of the reflecting surface 302 of the collimating optical system 30 is disposed on the reflecting surface 201 of the primary optical system 20 in the lighting device 1' according to the present exemplary embodiment, the light reflected by the reflecting surface 302 toward the front of the lamp is substantially parallel.

Therefore, it is understood that technical features of other constituent parts of the lighting device 1 'according to the present exemplary embodiment and technical effects achieved by the lighting device 1' may be substantially the same as those of the lighting device 1 of the foregoing embodiment except for the aforementioned different arrangement of the reflecting surface 302 of the collimating optical system 30, and will not be described herein.

Reference is now made to fig. 7. Fig. 7 is a schematic perspective view showing a lighting device 1″ for a vehicle lamp according to still another exemplary embodiment of the present application.

The lighting device 1″ according to the embodiment shown in fig. 7 differs from the aforementioned lighting device 1 according to the exemplary embodiment shown in fig. 1, for example, in the arrangement of the primary optical system 20. Only the differences between the lighting device 1″ and the lighting device 1 will be described below, and the same reference numerals will be used for the same constituent parts between the two embodiments and the detailed description thereof will be omitted.

In the lighting device 1″ of the exemplary embodiment shown in fig. 7, the reflection surface of the primary optical system 20 may be formed by the total reflection surface 2020 of the transparent light conductor 202. In some alternative embodiments, the light guide 202 may be made of a transparent material such as polycarbonate or polymethyl methacrylate. However, it should be noted that the embodiment of the transparent photoconductor 202 is not limited thereto, and for example, the transparent photoconductor 202 may be made of silicone.

In the illustrated exemplary embodiment, the transparent light conductor 202 may include a light incident surface 2022, a light exit surface 2021, and a total reflection surface 2020, as shown in fig. 7. After entering the light conductor 202 through the light incident surface 2022, the light emitted from the light source 10 is reflected by the total reflection surface 2020 and exits the light conductor 202 through the light exit surface 2021. In an alternative embodiment, the total reflection surface 2020 may be a concave curved surface having an arc shape, but the shape of the concave curved surface forming the total reflection surface 2020 is not limited thereto.

According to some alternative embodiments of the present application, the light conductor 202 may be disposed such that the extending direction of the axis A-A thereof coincides with the arrangement direction of the light sources 10. It will be appreciated that, in accordance with an embodiment of the present application, in order to project a desired illumination light shape in front of a vehicle lamp, the light guide 202 may be disposed relative to the collimating optical system 30 such that the focal point of the collimating optical system 30 is located on the fully reflective surface 2020 of the light guide 202. Furthermore, the light guide 202 may also be arranged such that the light source 10 does not substantially image on the total reflection surface 201 of the light guide 202, i.e. such that the light incident into the light guide 202 via the light incidence surface 2022 of the light guide 202, and thus reflected by the total reflection surface 2020 and exiting via the light exit surface 2021, are substantially parallel to each other. In this way, by cooperation with the collimator optical system 30, a desired irradiation light shape as shown in fig. 3 to 5 can be obtained.

Therefore, it is understood that technical features of other components of the lighting device 1″ according to the present exemplary embodiment and technical effects achieved by the lighting device 1″ may be substantially the same as those of the lighting device 1 of the foregoing embodiment except for the aforementioned different arrangement of the transparent light conductor 202, and will not be repeated herein.

Reference is now made to fig. 8. Fig. 8 is a schematic perspective view showing a lighting device 1' "for a vehicle lamp according to still another exemplary embodiment of the present application.

The lighting device 1' "according to the embodiment shown in fig. 8 is different from the lighting device 1 in the foregoing embodiment in that the reflection surface 201 of the primary optical system 20 may have an edge line 2010 for forming a cutoff line. Other technical features of the reflecting surface 201 are substantially the same as those of the lighting device 1 in the foregoing embodiment, and are not described in detail herein.

According to the present exemplary embodiment, a cutoff line of a low beam shape may be formed by the edge line 2010. It is understood that the structure of the edge line 2010 may be any cut-off structure.

In addition to substantially the same technical effects as the lighting device 1 of the foregoing embodiment, the lighting device 1' "according to the present exemplary embodiment can also achieve low beam lighting. That is, the illumination device 1' "in the present embodiment can realize a low beam illumination function (when the focal point of the collimating optical system 30 is disposed on the edge line 2010),

the ADB high beam illumination function (when the focal point of the collimator optical system 30 is disposed at another position of the reflecting surface 201) can also be realized.

Reference is now made to fig. 9. Fig. 9 is a schematic perspective view showing a lighting device 1"" for a vehicle lamp according to still another exemplary embodiment of the present application.

The lighting device 1"" according to the embodiment shown in fig. 9 is different from the lighting device 1' "in the foregoing embodiment in that a plurality of LED units 101 as the light sources 10 may be arranged in two rows in a matrix shape. In some embodiments, the spacing between two rows of the plurality of LED units 101 may be a minimum process spacing.

In an exemplary embodiment according to the present application, any one of the two rows of LED units among the plurality of LED units 101 as the light source 10 may be disposed at a focal line of the reflective surface 201.

By arranging two rows of LED units as the light sources 10, the number of light distributions corresponding to the plurality of LED units in the formed irradiation light shape can be increased, so that the control accuracy of the ADB can be improved.

It is understood that, in addition to the above-mentioned different arrangements of the light source 10 and the technical effects, the technical features of the other constituent parts of the lighting device 1"" and the technical effects achieved by the lighting device 1"" in the present exemplary embodiment may be substantially the same as those of the lighting device 1' "of the foregoing embodiment, and will not be repeated herein.

Reference is now made to fig. 10. Fig. 10 is a schematic perspective view showing a lighting device 1""' for a vehicle lamp according to still another exemplary embodiment of the present application.

The lighting device 1""' according to the embodiment shown in fig. 10 differs from the lighting device 1 according to the foregoing exemplary embodiment shown in fig. 1, for example, in the arrangement of the primary optical system 20 and the arrangement of the collimating optical system 30. Only the differences between the lighting device 1""' and the lighting device 1 will be described below, and the same reference numerals will be used for the same constituent parts between the two embodiments and detailed description thereof will be omitted.

In the lighting device 1""' of the exemplary embodiment shown in fig. 10, a plurality of LED units 101 as the light source 10 are divided into two groups, one group including the LED unit 10101, the LED unit 10103, the LED unit 10105, the LED unit 10107, the LED unit 10109, the LED unit 10111, and the other group including the LED unit 10102, the LED unit 10104, the LED unit 10106, the LED unit 10108, the LED unit 10110. In alternative embodiments, the plurality of LED units in each group of LED units may be arranged in a row. It should be noted here that in this context, when the LED units are divided into a plurality of groups in a similar way, each group of LED units should be regarded as a row of LED units. In other words, in the embodiment shown in fig. 10, the LED units are arranged in two rows.

In the illustrated exemplary embodiment, the light emitting surface width of each LED unit may be d, and the pitch in the arrangement direction of the plurality of LED units 101 in each group of LED units may be n-1 times the light emitting surface width d, that is, (n-1) xd, where n is the number of rows of LED units. In this embodiment, n is 2 as described above, and thus, the pitch in the arrangement direction of the plurality of LED units 101 in each group of LED units may be d. In some embodiments, the light emitting face width d may be about 1mm with a spacing of 1mm. However, it should be noted that the embodiments of the pitch and the light emitting surface width are not limited thereto, and other suitable values may be adopted according to actual needs. In this way, the LED units of each row are seamlessly joined in the lateral direction, i.e., in a direction substantially parallel to the focal line of the reflecting surface 201, and thus the minimum process pitch does not need to be considered in the lateral direction, so that it can be better ensured that the corresponding spots formed by the LED units are joined in sequence, and thus the illumination of the formed illumination light pattern is more uniform.

According to an exemplary embodiment of the present application, two reflection surfaces 301 may be provided in such a manner that each of the two groups of LED units corresponds to one reflection surface. Two sets of LED units as the plurality of LED units 101 of the light source 10 may be respectively disposed at focal lines of corresponding ones of the two reflecting surfaces 201.

In the embodiment of the present application, two convex lenses 301 may be provided in such a manner that each of the two groups of LED units corresponds to one convex lens, respectively. In some embodiments, the focal points of the convex lenses of the two convex lenses 301 may be disposed on corresponding ones of the two reflective surfaces 201, respectively.

In the illustrated embodiment, the two reflective surfaces 201 may be separated, and the two convex lenses 301 may be connected to each other. It should be noted that the arrangement of the reflecting surface 201 and the convex lenses 301 is not limited thereto, as long as it is arranged such that the focal points of the convex lenses in the two convex lenses 301 are located on the corresponding reflecting surfaces in the two reflecting surfaces 201, respectively. It should be appreciated that in some embodiments, the plurality of LED units 101 may share a reflective surface.

In the lighting device 1"", according to the exemplary embodiment of the present application, by dividing the plurality of LED units 101 as the light source 10 into two groups, disposing the two reflecting surfaces 301 in such a manner that each of the two groups of LED units corresponds to one reflecting surface, and disposing the two convex lenses 301 in such a manner that each of the two groups of LED units corresponds to one convex lens, the light distribution of the irradiation light shape formed by one group of LED units of the light source and the light distribution of the irradiation light shape formed by the other group of LED units of the light source overlap at least partially, it is more possible to ensure that the irradiation light shape projected in front of the vehicle lamp has uniform illumination illuminance without substantially having a clear bright light area and/or dark area corresponding to the disposition of the light source, as shown in fig. 24.

Next, light distribution characteristics of an irradiation light shape projected and formed in front of a vehicle lamp by the lighting device 1""' according to an exemplary embodiment of the present application will be described in detail with reference to fig. 11 to 24. Fig. 11 to 16 are screen illuminance diagrams respectively showing when the LED unit 10101 is turned on and the remaining LED units are turned off, when the LED unit 10103 is turned on and the remaining LED units are turned off, when the LED unit 10105 is turned on and the remaining LED units are turned off, when the LED unit 10107 is turned on and the remaining LED units are turned off, when the LED unit 10109 is turned on and the remaining LED units are turned off, and when the LED unit 10111 is turned on and the remaining LED units are turned off in the light source 10 of the exemplary embodiment of the present application. Fig. 17 is a screen illuminance diagram showing when all LED units in a group of LED units of the light source 10 of the lighting device 1""' according to an exemplary embodiment of the present application are lighted. Fig. 18 to 22 are screen illuminance diagrams respectively showing when the LED unit 10102 is turned on and the remaining LED units are turned off, when the LED unit 10104 is turned on and the remaining LED units are turned off, when the LED unit 10106 is turned on and the remaining LED units are turned off, when the LED unit 10108 is turned on and the remaining LED units are turned off, and when the LED unit 10110 is turned on and the remaining LED units are turned off in the light source 10 of the illumination device 1""' according to the exemplary embodiment of the present application. Fig. 23 is a screen illuminance diagram showing when all LED units in another group of LED units of the light source 10 of the lighting device 1""' according to an exemplary embodiment of the present application are lighted. Fig. 24 is a screen illuminance diagram showing when all of the two sets of LED units of the light source 10 of the lighting device 1""' according to the exemplary embodiment of the present application are lighted.

As can be seen from the screen illuminance diagrams of fig. 11 to 24, in the illumination apparatus 1"", according to the exemplary embodiment of the present application, not only the light distribution of the irradiation light shape formed by the respective LED units in each group of LED units of the light source is at least partially overlapped, but also the light distribution of the irradiation light shape formed by one group of LED units of the light source is at least partially overlapped with the light distribution of the irradiation light shape formed by another group of LED units of the light source, so that it is more possible to ensure that there is substantially no clear dark region among the light distribution of the entire irradiation light shape formed when all LED units are lit up.

Therefore, it is understood that technical features of other constituent parts of the illumination apparatus 1""' according to the present exemplary embodiment may be substantially the same as those of the illumination apparatus 1 of the foregoing embodiment except for the aforementioned arrangement of the primary optical system 20 and the arrangement of the collimating optical system 30, and will not be repeated here.

Reference is now made to fig. 25 and 26. Fig. 25 is a schematic assembled perspective view showing a lighting device 1"" "for a vehicle lamp according to another exemplary embodiment of the present application. Fig. 26 is a schematic exploded perspective view showing a lighting device 1"" "for a vehicle lamp according to an exemplary embodiment of the present application.

Only the differences of the lighting device 1"" "according to the embodiment shown in fig. 25 and 26 from the lighting device 1 of the foregoing embodiment will be described below, and the same reference numerals will be used for the same constituent parts between the two embodiments and detailed description thereof will be omitted.

In the exemplary embodiment shown in fig. 25 and 26, the lighting device 1"" "may include the light source 10, the reflection surface 201 of the primary optical system 20, the convex lens 301 as the collimating optical system 30, the heat sink 50, the wiring board 60, the holder 70, and the support 80, wherein the heat sink 50, the wiring board 60, and the holder 70 are sequentially disposed from top to bottom along the up-down direction of the lighting device 1" ", in other words, the holder 70 is disposed at the lower side of the wiring board 60.

In an exemplary embodiment according to the present application, the heat sink 50 may be configured to radiate heat from the circuit board 60, the heat sink 50 may have a substantially C-shape that is open toward an upper side of the heat sink 50, and the heat sink 50 may include opposite side walls, each of which may have a flange, and a web that connects the side walls, and the web may be opposite to the flange. The heat sink 50 may include two holes 501 extending through a web of the heat sink 50.

In some embodiments of the present application, the wiring board 60 may be configured in a substantially plate-like shape. Two holes 601 may be provided on the wiring board 60, and the two holes 601 may extend through the wiring board 60 and be aligned with the two holes 501, respectively. In the illustrated embodiment, the light source 10 may be mounted on the surface of the circuit board 60 facing the bracket 70, such as by any means known in the art.

In the embodiment according to the present application, the bracket 70 may include the first connection portion 71 and the second connection portion 72, the first connection portion 71 may have a flat portion facing the wiring board 60 to be connected to the wiring board 60, and the first connection portion 71 may be at an angle to a horizontal direction substantially parallel to the front-rear direction of the lighting device 1"",

the first connection portion 71 may be provided therein with two holes 701 aligned with the two holes 601, respectively, for connecting the heat sink 50, the circuit board 60 and the bracket 70 together by inserting two fasteners 90, such as screws, through the corresponding holes 501, holes 601 and holes 701, respectively, and the second connection portion 72 may be used for mounting and holding the reflective surface 201 of the primary optical system 20. In the illustrated embodiment, the reflective surface 201 may form a part of the bracket 70 and extend between the first connection portion 71 and the second connection portion 72 in the front-rear direction of the lighting device 1 "". The bracket 70 includes a pair of seating portions 702 at positions of the second connection portion 72 on opposite sides of the reflection surface 201 in the left-right direction of the lighting device 1 "". Through holes 703 are formed in the pair of seating portions 702, respectively. It should be noted that the reflective surface 201 may also be formed on a separate component that may be attached to the bracket 70, for example, by fasteners.

In some embodiments, the support 80 may be provided for mounting and holding the convex lens 301 as the collimating optical system 30 such that the focal point of the convex lens 301 is located on the reflecting surface 201. The support 80 may have a rectangular parallelepiped shape and define a hollow 801 for the light reflected by the reflecting surface 201 to pass through. The support 80 may include a pair of lugs 802 at opposite sides of the support 80 in the left-right direction of the lighting device 1 "". Holes 803 may be respectively formed in the pair of lugs 802, and the holes 803 may be positioned and oriented to be respectively opposite to the corresponding through holes 703 for connecting the bracket 70 and the support 80 by inserting two fasteners 100 through the corresponding holes 803 and the through holes 703, respectively. It should be appreciated that the lugs 802 and the seats 702 may be arranged such that: the focal length of the convex lens 301 is allowed to be adjusted so that the focal point of the convex lens 301 is located on the reflecting surface 201.

In the illustrated embodiment of the present application, the convex lens 301 as the collimating optical system 30 may be mounted to the support 80 in the following manner, for example: the convex lens 301 is processed, such as cut, at the side portion to be inserted into a recess formed in the side of the support 80 opposite to the bracket 70 by snap-fit. However, the connection manner of the convex lens 301 and the support 80 is not limited thereto, as long as the support 80 mounts and holds the convex lens 301 such that the focal point of the convex lens 301 is located on the reflection surface 201.

In the exemplary embodiment of the present application, light passing through the hollow portion 801 of the support 80 among light reflected by the reflecting surface 201 is projected by the convex lens 301, and light not passing through the hollow portion 801 is blocked by the wall of the hollow portion 80 of the support 80 without forming stray light, whereby uniformity of illumination illuminance of an irradiation light shape formed by projection in front of a vehicle lamp can be improved.

Therefore, it is understood that technical features of other constituent parts of the lighting device 1"" "and technical effects achieved by the lighting device 1" "" in the present exemplary embodiment may be substantially the same as those of the lighting device 1 of the foregoing embodiment except for the aforementioned arrangement and technical effects, and will not be described again.

Reference is now made to fig. 27. Fig. 27 is a schematic perspective view showing a lighting device 1"" "' for a vehicle lamp according to still another exemplary embodiment of the present application.

The lighting device 1"" "" according to the embodiment shown in fig. 27 is different from the foregoing lighting device 1 according to the exemplary embodiment shown in fig. 1, for example, in the arrangement of the primary optical system 20. Only the differences from the lighting device 1 ""' to the lighting device 1 will be described below, and the same reference numerals will be used for the same constituent parts between the two embodiments and detailed description thereof will be omitted.

In the lighting device 1"" "of the exemplary embodiment shown in fig. 27, the reflection surface 201 is a unidirectionally drawn concave curved surface formed by unidirectionally drawing a folding line having a shape similar to a parabola or an ellipsoid along a normal direction of a plane in which the folding line is located. The polygonal line may be a polygonal line having a shape similar to a parabolic or ellipsoidal line formed by connecting a plurality of line segments, each end point of the plurality of line segments forming the polygonal line being located on the same parabolic or ellipsoidal line.

It is understood that technical features of other components of the lighting device 1"" "' and technical effects achieved by the lighting device 1" "" according to the present exemplary embodiment may be substantially the same as those of the lighting device 1 of the foregoing embodiment except for the aforementioned different arrangement of the reflective surface 201 of the primary optical system 20, and will not be repeated herein.

According to an exemplary embodiment of the present application, there is also provided a vehicle lamp including the lighting device 1, 1', 1", 1 '", 1"", or 1"" ', according to the foregoing exemplary embodiment. It should be understood that the vehicle lamp provided by the present application is capable of achieving at least the various advantageous technical effects described above with respect to the lighting device 1, 1', 1", 1 '", 1"", or 1"" "'.

While the application has been described with reference to exemplary embodiments, it is to be understood that the application is not limited to the described embodiments. Various changes may be made to the exemplary embodiments by those skilled in the art without departing from the technical spirit of the present application.

The features that are mentioned and/or shown in the above description of exemplary embodiments of the application may be combined in the same or similar manner in one or more other embodiments, in combination with or in place of the corresponding features of the other embodiments. Such combined or substituted solutions should also be considered to be included within the scope of the present application.

Industrial applicability

The application provides an illumination device for a vehicle lamp and a vehicle lamp comprising the same. The illumination device includes a light source, a primary optical system, and a collimating optical system. The light source includes a plurality of LED units which are arranged side by side in a straight arrangement direction and can be independently controlled. The primary optical system has a reflective surface configured to reflect light emitted by the light source. The collimating optical system is configured to project light reflected by the reflecting surface and to emit the projected light forward of the lamp. In the illumination device, a light source is disposed at a focal line of a reflecting surface, light emitted by the light source forms a primary light spot via reflection by the reflecting surface, and a focus of a collimating optical system is disposed on the reflecting surface to image the primary light spot, thereby forming an irradiation light shape.

It will be appreciated that the lighting device and lamp provided by the present application are reproducible and can be used in a variety of industrial applications.

Claims

A lighting device (1; 1';1";1" "', 1" "" ";1" "" "" "") for a vehicle lamp, the lighting device (1; 1';1";1" ";1" "" "" "") comprising:

a light source (10), the light source (10) comprising a plurality of LED units (101), the plurality of LED units (101) being arranged side by side in a linear arrangement direction and being independently controllable;

a primary optical system (20), the primary optical system (20) having a reflective surface (201; 2020), the reflective surface (201; 2020) being configured to reflect light emitted by the light source (10); and

a collimating optical system (30), the collimating optical system (30) being configured to project light reflected by the reflecting surface (201; 2020) and to emit the projected light in front of the lamp,

wherein the light source (10) is arranged at the focal line of the reflecting surface (201; 2020), the light emitted by the light source (10) forms a primary light spot via reflection of the reflecting surface (201; 2020), and

Wherein the focal point of the collimating optical system (30) is arranged on the reflecting surface (201; 2020) for imaging the primary spot to form an illumination light shape.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "') the plurality of LED units (101) are arranged in one row or n rows, wherein n is equal to or greater than 2, when the plurality of LED units (101) are arranged in one row, the spacing in the arrangement direction of the plurality of LED units (101) is the minimum process spacing, and when the plurality of LED units (101) are arranged in n rows, the spacing in the arrangement direction of the plurality of LED units (101) is the minimum process spacing or n-1 times the width of the light emitting surface of each LED unit.
The lighting device (1; 1'; 1', 1', and the plurality of LED units (101) share a single reflecting surface.
A lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "') the plurality of LED units (101) are divided into two or more groups, the collimating optical system (30) includes a convex lens (301) or a lens group or includes a parabolic reflecting surface (302), and the convex lens (301) or the lens group or the parabolic reflecting surface (302) is provided with a plurality of convex lenses or lens groups or parabolic reflecting surfaces in such a manner that each of the two or more groups of the plurality of LED units (101) corresponds to one convex lens or lens group or parabolic reflecting surface, respectively.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "'", and the plurality of LED units (101) are divided into two or more groups, and a plurality of reflection surfaces are provided in such a manner that each of the two or more groups of the plurality of LED units (101) corresponds to one reflection surface.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "') the collimating optical system (30) includes a convex lens (301) or a lens group or includes a parabolic reflecting surface (302), the convex lens (301) or the lens group or the parabolic reflecting surface (302) being provided with a plurality of convex lenses or lens groups or parabolic reflecting surfaces in such a manner that each of the two or more groups of the plurality of LED units (101) corresponds to one convex lens or lens group or parabolic reflecting surface, respectively.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "', and the reflecting surface of the primary optical system (20) is a concave curved surface.
The lighting device (1; 1'; 1', 1', and the reflecting surface of the primary optical system (20) is a unidirectionally stretched concave curved surface.
The lighting device (1; 1'; 1', 1', and the reflecting surface of the primary optical system (20) is a unidirectionally stretched concave curved surface formed by unidirectionally stretching a parabola or an ellipsoid along a straight line.
The lighting device (1; 1'; 1', 1', and the reflecting surface of the primary optical system (20) is a unidirectionally stretched concave curved surface formed by unidirectionally stretching a fold line having a shape similar to a parabola or an ellipsoid line along a straight line.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" ""'), the focal length of the parabola, or the distance between the near focus of the ellipsoidal line and the vertex of the ellipsoidal line near focus is between 0.1mm and 10 mm.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" ""') the focal length of the parabola, or the distance between the near focus of the ellipsoid and the vertex of the ellipsoid near focus is between 1mm and 3 mm.
The lighting device (1; 1'; 1', 1', the stretching direction of the unidirectional stretching concave curved surface is identical to the arrangement direction of the plurality of LED units (101).
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "', and the reflecting surface of the primary optical system (20) is formed by a metal plating film.
The lighting device (1; 1'; 1'; 1"", 1"" ', 1"" "', and the reflecting surface of the primary optical system (20) is formed by a total reflecting surface of a transparent photoconductor (202).
A lighting device (1; 1'; 1'; 1"", 1"" ', 1"" ", 1" "') and a lamp.