Multi-light-source common virtual image point light guide structure and vehicle lamp

Abstract

The utility model belongs to the technical field of car lamps, and particularly relates to a multi-light-source common virtual image point light guide structure which comprises light sources and a reflection unit, and the light sources comprise a multi-core light source or a plurality of single-core light sources. The reflection unit is arranged in the light emitting direction of the light source and comprises a plurality of plane mirrors, the plane mirrors are arranged in an intersecting mode and all intersect at an intersecting line, a real image point is presented on one side of each plane mirror, a virtual image point is presented on the other side of each plane mirror, and the virtual image point corresponds to the real image point. The real image points and the virtual image points are arranged in a mirror symmetry mode with respect to the plane mirrors, the virtual image points coincide, the real image points of each plane mirror coincide with one light-emitting chip of the light source, and light emitted by each light-emitting chip is reflected by the corresponding plane mirror to obtain reflected light. Reverse extension lines of all reflected light rays are converged at a virtual image point. According to the utility model, the lighting uniformity and the overall lighting effect can be improved, and a compact vehicle lamp structure can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a multi-source common virtual image point light guide structure and automotive lighting. Background Technology

[0002] As the automotive industry rapidly develops towards intelligence and high-end features, the optical performance requirements for headlights, as core components of vehicle safety and exterior design, are constantly increasing. This has led to higher design requirements for headlight optical solutions, especially with the widespread application of dual-light source multiplexing functionality. Dual-light source multiplexing technology (such as integrated high and low beam headlights) has become one of the mainstream solutions in modern headlight design due to its advantages such as flexible switching of lighting modes and improved light efficiency.

[0003] Traditional dual-light source reuse schemes often use a collimation structure such as a plane reflector or condenser for two light sources, resulting in a defocused design. While this design achieves dual-light source reuse, the defocused design leads to uneven distribution of light spots, severely affecting the uniformity of illumination and overall luminous efficiency. Furthermore, a single plane reflector or condenser must simultaneously meet the optical parameter requirements of two light sources, resulting in a bulky collimation structure that is difficult to adapt to compact automotive headlight structures. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problems of poor illumination uniformity, low luminous efficiency and large collimation structure in the prior art, this utility model provides a multi-source common virtual image point light guide structure and vehicle lamp, which can improve illumination uniformity and overall luminous efficiency, and can be adapted to compact vehicle lamp structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a multi-source common virtual image point light guide structure, which includes: a light source, wherein the light source includes a multi-core light source or multiple single-core light sources;

[0006] A reflection unit is disposed in the light emission direction of the light source. The light emitted by the light source is reflected by the reflection unit to obtain reflected light. The reflection unit includes multiple plane mirrors, and the number of plane mirrors corresponds to the number of light-emitting chips in the light source.

[0007] Multiple planar mirrors are arranged intersecting at a single line of intersection. Each planar mirror has a real image point on one side and a virtual image point on the other side. The real and virtual image points are mirror-symmetrical about the planar mirror, and the multiple virtual image points coincide. The real image point of each planar mirror coincides with a light-emitting chip of the light source. The light emitted by each light-emitting chip is reflected by its corresponding planar mirror to obtain reflected light. The backward extensions of all reflected light rays converge at the virtual image point.

[0008] The specific technical effects are as follows: each light-emitting chip corresponds to a plane reflector, and the chip position coincides with the real image point of the plane reflector, so that the light emitted by each light-emitting chip is reflected by the corresponding plane reflector to obtain its own reflected light, forming a uniform light spot distribution and improving the uniformity of illumination; the backward extension lines of all reflected light converge at the virtual image point, reducing optical path loss and improving light efficiency; multiple plane reflectors are intersected and all intersect at a line of intersection to form a compact reflection unit, which can be adapted to compact vehicle headlight structures.

[0009] Furthermore, the reflecting unit includes two planar mirrors, and the projection contours of the two planar mirrors on the vertical plane are both straight lines, namely a first straight line and a second straight line. The first straight line and the second straight line are intersecting and arranged. The first straight line extends along the length direction of the reflecting unit to form a first reflecting structure, and the second straight line extends along the length direction of the reflecting unit to form a second reflecting structure. The first reflecting structure and the second reflecting structure are alternately arranged along the length direction of the reflecting unit to form the reflecting unit.

[0010] Furthermore, the reflecting unit includes two planar mirrors, the projection contours of the two planar mirrors on the vertical plane are both straight lines, the two straight lines are a first straight line and a second straight line, the first straight line and the second straight line are intersecting, the first straight line is formed by multiple segments of first small straight lines arranged at intervals, the first small straight lines extend along the length direction of the reflecting unit to form a first small plane mirror, the second straight line is formed by multiple segments of second small straight lines arranged at intervals, the second small straight lines extend along the length direction of the reflecting unit to form a second small plane mirror, the first small plane mirror and the second small plane mirror alternately form a reflecting structure multiple times along the width direction of the reflecting unit, and the multiple reflecting structures are staggered and alternately arranged along the length direction of the reflecting unit to form the reflecting unit.

[0011] Furthermore, the adjacent first and second small plane mirrors are connected by a transition surface.

[0012] Furthermore, both the first and second small plane mirrors are strip-shaped, rectangular, or rhomboid.

[0013] Furthermore, the light guiding structure also includes a lens unit, which is disposed on one side of the reflection unit. The lens unit includes a light-incident surface and a light-outceasing surface. The light emitted by the light source is reflected by the reflection unit, enters the light-incident surface of the lens, and is refracted by the light-incident surface before exiting parallel out of the light-outceasing surface.

[0014] Furthermore, the light guiding structure also includes a curved surface reflection unit, which is disposed on one side of the reflection unit. The light emitted by the light source is reflected by the reflection unit and then reaches the curved surface reflection unit, and is emitted in parallel after being reflected by the curved surface reflection unit.

[0015] Furthermore, the light guiding structure also includes: an incident light unit and an exit light unit. The incident light unit is disposed between the reflection unit and the light source, and the exit light unit is disposed on one side of the reflection unit. The light emitted by the light source passes through the incident light unit and reaches the plane mirror. After being reflected by the plane mirror, it is emitted parallel from the exit light unit.

[0016] A vehicle light, comprising the multi-source common virtual image point light guide structure described above.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) This utility model uses a plane mirror to correspond to each light-emitting chip, and the chip position coincides with the real image point of the plane mirror, so that the light emitted by each light-emitting chip is reflected by the corresponding plane mirror to obtain its own reflected light, forming a uniform light spot distribution and improving the lighting uniformity;

[0019] (2) This utility model reduces optical path loss and improves light efficiency by converging the backward extensions of all reflected light rays to the virtual image point.

[0020] (3) This utility model forms a compact reflection unit by intersecting multiple planar reflectors and all of them intersecting at a line of intersection, which can be adapted to compact vehicle headlight structures. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a projection outline of Example 1 in a vertical plane;

[0023] Figure 2 This is a partial projection outline of Example 2 in a vertical plane;

[0024] Figure 3 This is the optical path diagram in the vertical plane for Example 2;

[0025] Figure 4 This is a schematic diagram of the structure of Example 2;

[0026] Figure 5 for Figure 3 The main view;

[0027] Figure 6 for Figure 3 Side view;

[0028] Figure 7 for Figure 3 Top view;

[0029] Figure 8 This is a projection outline of Example 3 in a vertical plane;

[0030] Figure 9 This is a projection outline of Example 4 in a vertical plane;

[0031] Figure 10 This is a projection outline of Example 5 in a vertical plane.

[0032] In the diagram: 1. Light source; 101. First single-core light source; 102. Second single-core light source; 2. Reflection unit; 201. Plane mirror; 202. Real image point; 203. Virtual image point; 204. First straight line; 205. Second straight line; 208. First small straight line; 209. Second small straight line; 210. First small plane mirror; 211. Second small plane mirror; 212. Reflection structure; 213. Transition surface; 3. Lens unit; 301. Lens incident surface; 302. Lens exiting surface; 4. Curved surface reflection unit; 5. Incident light unit; 6. Exiting light unit. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] A multi-source common virtual image point light guide structure includes: a light source 1 and a reflection unit 2. The light source 1 includes a multi-core light source or multiple single-core light sources. The reflection unit 2 is disposed in the light emission direction of the light source 1. The light emitted by the light source 1 is reflected by the reflection unit 2 to obtain reflected light. The reflection unit 2 includes multiple plane mirrors 201. The number of plane mirrors 201 corresponds to the number of light-emitting chips in the light source 1.

[0037] Multiple plane mirrors 201 are arranged intersectingly, and all intersect at a line of intersection. Each plane mirror 201 has a real image point 202 on one side and a virtual image point 203 on the other side. The real image point 202 and the virtual image point 203 are arranged in a mirror symmetry with respect to the plane mirror 201. Multiple virtual image points 203 are arranged to overlap. The real image point 202 of each plane mirror 201 is arranged to overlap with a light-emitting chip of the light source 1. The light emitted by each light-emitting chip is reflected by its corresponding plane mirror 201 to obtain reflected light. The backward extensions of all reflected light converge at the virtual image point 203.

[0038] Therefore: each light-emitting chip corresponds to a plane reflector 201, and the chip position coincides with the real image point 202 of the plane reflector 201, so that the light emitted by each light-emitting chip is reflected by the corresponding plane reflector 201 to obtain its own reflected light, forming a uniform light spot distribution and improving the uniformity of illumination; the backward extension lines of all reflected light converge at the virtual image point 203, reducing optical path loss and improving light efficiency; multiple plane reflectors 201 are intersected and all intersect at a line of intersection to form a compact reflection unit 2, which can be adapted to compact vehicle lamp structures.

[0039] Example 1:

[0040] like Figure 1 As shown, the vertical direction is the width direction of the reflecting unit 2. In this embodiment, the reflecting unit 2 includes two plane mirrors 201, which are a first plane mirror and a second plane mirror. The projection outline of the first plane mirror on the vertical plane is a first straight line 204, and the projection outline of the second plane mirror on the vertical plane is a second straight line 205. The first straight line 204 and the second straight line 205 intersect. The real image point 202 of the first plane mirror is point A, and the virtual image point 203 of the first plane mirror is point O1. The real image point 202 of the second plane mirror is point B, and the virtual image point 203 of the second plane mirror is point O2. Points O1 and O2 are set to coincide. Light source 1 consists of two single-core light sources: a first single-core light source 101 and a second single-core light source 102. The light emission center of the first single-core light source 101 coincides with point A, and the light emission center of the second single-core light source 102 coincides with point B. The light emitted from point A by the first single-core light source 101 is reflected by the first plane mirror to obtain the first reflected light. The backward extensions of all the first reflected light rays converge at the virtual image point 203. The light emitted from point B by the second single-core light source 102 is reflected by the second plane mirror to obtain the second reflected light. The backward extensions of all the second reflected light rays also converge at the virtual image point 203.

[0041] The first straight line 204 extends along the length direction of the reflective unit 2 to form a first reflective structure, and the second straight line 205 extends along the length direction of the reflective unit 2 to form a second reflective structure. The first reflective structure and the second reflective structure are arranged alternately along the length direction of the reflective unit 2 to form the reflective unit 2.

[0042] The surface of the reflective unit 2 can be coated with a reflective material, so that the surface of the reflective unit 2 has a certain reflectivity.

[0043] Specifically, in an embodiment not shown, the light guide structure can also be applied to a single-core light source, in which case the number of plane mirrors 201 is one.

[0044] Example 2:

[0045] The difference from Example 1 is that, as Figures 2 to 7 As shown, in this embodiment, the first straight line 204 is formed by multiple segments of first small straight lines 208 arranged at intervals. The first small straight lines 208 extend along the length direction of the reflecting unit 2 to form a first small plane mirror 210. The second straight line 205 is formed by multiple segments of second small straight lines 209 arranged at intervals. The second small straight lines 209 extend along the length direction of the reflecting unit 2 to form a second small plane mirror 211. The first small plane mirror 210 and the second small plane mirror 211 alternately form a reflecting structure 212 along the width direction of the reflecting unit 2. Multiple reflecting structures 212 are arranged alternately and staggered along the length direction of the reflecting unit 2 to form the reflecting unit 2 (e.g., ...). Figure 5 As shown, the vertical direction represents the width of the reflecting unit 2, and the horizontal direction represents its length. That is, there is a second small plane mirror 211 between adjacent first small plane mirrors 210 in the width direction of the reflecting unit 2, and a second small plane mirror 211 between adjacent first small plane mirrors 210 in the length direction of the reflecting unit 2. Thus, the overall plane mirror is subdivided into multiple small plane mirrors. When the overall plane mirror reflects light, it may experience local deformation due to manufacturing errors, resulting in aberrations. Each small plane mirror only reflects a local portion of the light, reducing the overall aberration accumulation, improving light efficiency, and enhancing illumination uniformity.

[0046] For details, see Figure 2 As shown, the first straight line 204 and the second straight line 205 are intersecting. Therefore, the intersection line divides the first straight line 204 and the second straight line 205 into upper and lower parts. Thus, in the upper part, the second small straight line 209 is located to the right of the first small straight line 208, and in the lower part, the first small straight line 208 is located to the right of the second small straight line 209.

[0047] For details, see Figure 3 As shown, in this embodiment, the adjacent first small plane mirror 210 and second small plane mirror 211 are connected by a transition surface 213.

[0048] For details, see Figure 3 As shown, since the first straight line 204 and the second straight line 205 are intersecting, the two ends of the first straight line 204 will be far away from the two ends of the second straight line 205. Therefore, in the vertical plane, the horizontal length of the transition surface 213 gradually increases from the intersection of the first straight line 204 and the second straight line 205 towards both ends.

[0049] In this embodiment, both the first small plane mirror 210 and the second small plane mirror 211 are strip-shaped, rectangular, or rhomboid.

[0050] Example 3:

[0051] The difference from Example 2 is that, as Figure 8As shown, in this embodiment, the light guide structure further includes a lens unit 3, which is disposed on one side of the reflection unit 2. The lens unit 3 includes a lens light-incident surface 301 and a lens light-outcident surface 302. The light emitted by the light source 1 is reflected by the reflection unit 2 and enters the lens light-incident surface 301. After being refracted by the lens light-incident surface 301, it is emitted parallel from the lens light-outcident surface 302.

[0052] Example 4:

[0053] The difference from Example 2 is that, as Figure 9 As shown, in this embodiment, the light guide structure further includes a curved surface reflection unit 4, which is disposed on one side of the reflection unit 2. The light emitted by the light source 1 is reflected by the reflection unit 2 and then reaches the curved surface reflection unit 4, where it is reflected in parallel. This achieves the effects of collimation and optical light distribution.

[0054] Example 5:

[0055] The difference from Example 2 is that, as Figure 10 As shown, in this embodiment, the light guide structure further includes: a light-incident unit 5 and a light-exiting unit 6. The light-incident unit 5 is disposed between the reflector unit 2 and the light source 1, and the light-exiting unit 6 is disposed on one side of the reflector unit 2. The reflector unit 2 is inclined. Preferably, the angle between the reflector unit 2 and the horizontal direction is 45°. Therefore, parallel light emission can be achieved without aluminum plating on the surface of the reflector unit 2. The light emitted by the light source 1 reaches the plane reflector 201 after passing through the light-incident unit 5. After being reflected by the plane reflector 201, it is emitted in parallel from the light-exiting unit 6.

[0056] Specifically, the light-emitting unit 6 has a light-emitting surface, which can be set as a lens surface or a freeform surface according to optical requirements.

[0057] Example 6:

[0058] A vehicle light, wherein a multi-source common virtual image point light guide structure includes any one of the above.

[0059] Compared with the prior art, the beneficial effects of this utility model are:

[0060] (1) By having each light-emitting chip correspond to a plane mirror 201 and the chip position coincides with the real image point 202 of the plane mirror 201, the light emitted by each light-emitting chip is reflected by the corresponding plane mirror 201 to obtain its own reflected light, forming a uniform light spot distribution and improving the lighting uniformity.

[0061] (2) This utility model reduces optical path loss and improves light efficiency by converging the backward extensions of all reflected light rays to the virtual image point 203.

[0062] (3) This utility model forms a compact reflection unit 2 by intersecting multiple planar reflectors 201 and all intersecting at a line of intersection, which can be adapted to compact vehicle headlight structures.

[0063] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A multi-light-source co-virtual image point light guide structure, characterized in that, The application relates to a light source, which comprises: a light source (1) comprising a multi-core light source or a plurality of single-core light sources; a reflection unit (2) arranged in the light emission direction of the light source (1), wherein the light emitted by the light source (1) is reflected by the reflection unit (2) to obtain reflected light, and the reflection unit (2) comprises a plurality of plane mirrors (201), the number of the plane mirrors (201) corresponding to the number of light-emitting chips in the light source (1); the plurality of plane mirrors (201) are arranged to intersect, and each plane mirror (201) is arranged to intersect at a line of intersection, and each plane mirror (201) has a real image point (202) on one side and a virtual image point (203) on the other side, the real image point (202) and the virtual image point (203) being arranged to be mirror-symmetrical about the plane mirror (201), the plurality of virtual image points (203) being arranged to coincide, and the real image point (202) of each plane mirror (201) being arranged to coincide with a light-emitting chip of the light source (1), the light emitted by each light-emitting chip being reflected by the plane mirror (201) corresponding to the light-emitting chip to obtain reflected light, and the reverse extensions of all the reflected light converging at the virtual image point (203).

2. A multi-light-source co-virtual image point light guide structure as described in claim 1, wherein, The reflection unit (2) comprises two plane mirrors (201), the projection contour lines of the two plane mirrors (201) on a vertical plane are straight lines, the two straight lines are a first straight line (204) and a second straight line (205), the first straight line (204) and the second straight line (205) are arranged to intersect, the first straight line (204) extends along the length direction of the reflection unit (2) to form a first reflection structure, the second straight line (205) extends along the length direction of the reflection unit (2) to form a second reflection structure, and the first reflection structure and the second reflection structure are arranged alternately along the length direction of the reflection unit (2) to form the reflection unit (2).

3. A multi-light-source co-virtual image point light guide structure as described in claim 1, wherein, The reflection unit (2) comprises two plane mirrors (201), the projection contour lines of the two plane mirrors (201) on a vertical plane are straight lines, the two straight lines are a first straight line (204) and a second straight line (205), the first straight line (204) and the second straight line (205) are arranged to intersect, the first straight line (204) is formed by a plurality of first small straight lines (208) arranged at intervals, the first small straight lines (208) extend along the length direction of the reflection unit (2) to form first small plane mirrors (210), the second straight line (205) is formed by a plurality of second small straight lines (209) arranged at intervals, the second small straight lines (209) extend along the length direction of the reflection unit (2) to form second small plane mirrors (211), the first small plane mirrors (210) and the second small plane mirrors (211) are arranged alternately along the width direction of the reflection unit (2) to form reflection structures (212), and the plurality of reflection structures (212) are arranged alternately in a staggered manner along the length direction of the reflection unit (2) to form the reflection unit (2).

4. A multi-light-source co-virtual image point light guide structure as defined in claim 3, wherein, The first facet mirror (210) and the second facet mirror (211) are connected by a transition surface (213).

5. A multi-light-source co-virtual image point light guide structure as defined in claim 3, wherein, The first facet mirror (210) and the second facet mirror (211) are in the shape of a strip, a rectangle or a diamond.

6. A multi-light-source co-virtual-point light guiding structure as defined in claim 1, wherein, The light guide structure further comprises a lens unit (3) disposed on one side of the reflecting unit (2), the lens unit (3) comprising a lens light-in surface (301) and a lens light-out surface (302), the light emitted by the light source (1) entering the lens light-in surface (301) after being reflected by the reflecting unit (2) and exiting the lens light-out surface (302) in parallel after being refracted by the lens light-in surface (301).

7. A multi-light-source co-virtual image point light guide structure as described in claim 1, wherein, The light guide structure further comprises a curved surface reflecting unit (4) disposed on one side of the reflecting unit (2), the light emitted by the light source (1) reaching the curved surface reflecting unit (4) after being reflected by the reflecting unit (2) and exiting in parallel after being reflected by the curved surface reflecting unit (4).

8. A multi-light-source co-virtual image point light guide structure as described in claim 1, wherein, The light guide structure further comprises a light-in unit (5) disposed between the reflecting unit (2) and the light source (1) and a light-out unit (6) disposed on one side of the reflecting unit (2), the light emitted by the light source (1) reaching the plane mirror (201) after passing through the light-in unit (5) and exiting from the light-out unit (6) in parallel after being reflected by the plane mirror (201).

9. A vehicle lamp characterized by A multi-light-source common-virtual-image-point light guide structure as claimed in any one of claims 1-8.

Images