Vehicle light device

Abstract

A vehicle lamp device includes a substrate unit, a light emitting unit, and a light guide element. The light emitting unit is disposed on the substrate unit and capable of projecting light to the left. The light guide element includes a light emitting portion and a light reflecting portion arranged in a rear-front direction, and a light entering portion connected between the light emitting portion and the light reflecting portion and facing the light emitting unit. The light emitting portion is formed with a plurality of light emitting surfaces arranged in a left-right direction and protruding rearward. Each of the light emitting surfaces defines a real focal point located in front of the light reflecting portion. The light reflecting portion is formed with a plurality of light reflecting surfaces arranged in a left-right direction and protruding toward an inner side of the light guide element. Each of the light reflecting surfaces defines a virtual focal point overlapping the real focal point corresponding thereto and capable of reflecting light to the rear toward the light emitting surface corresponding thereto with the extension line of the light meeting at the virtual focal point. The present application forms a virtual light source at the virtual focal point corresponding to the light emitting surface with each of the light reflecting surfaces, and has the feature of being capable of concentrating light in a light distribution effective area.

Description

Technical Field

[0001] The present invention relates to a component of a vehicle, and more particularly to a vehicle lighting device suitable for use as a brake light. Background Technology

[0002] See Figures 1 to 3 An existing side-incident vehicle lamp device includes a substrate unit 11, a light-emitting unit 12 disposed on the substrate unit 11, and a light guide element 13 mounted on the substrate unit 11 and extending to the left and right.

[0003] The light-emitting unit 12 includes three light sources 121 arranged in a front-to-back manner and located between the substrate unit 11 and the light guide element 13. The light sources 121 can provide light that travels in the left-right direction.

[0004] The light guide element 13 includes a light emitting part 14 and a reflective part 15 arranged in a front-to-back manner, and a light receiving part 16 connected between the light emitting part 14 and the reflective part 15 and facing the light emitting unit 12.

[0005] The light-emitting part 14 has a planar light-emitting surface 141. The reflective part 15 extends obliquely from front to back and includes a plurality of planar reflective surfaces 151 arranged horizontally. Each reflective surface 151 can reflect light rays traveling roughly in the left-right direction backward toward the light-emitting part 14, so that the light rays are emitted from the light-emitting surface 141 and form a light-emitting surface 141. Figure 3 The light pattern is shown. The light-incident section 16 has three light-collecting structures 161 protruding toward the light source 121.

[0006] This type of existing vehicle lighting device is suitable as a brake light to warn vehicles behind. However, for brake lights, the legally prescribed effective light distribution zone of 180° is only... Figure 3 The area shown is located in the central region, but from Figure 3 Looking at the isoluminance rings composed of the same candle (cd), taking the first isoluminance ring 181, the second isoluminance ring 182, and the third isoluminance ring 183 counting outwards from the center as examples, they are all generally upright ellipses or rectangles with the same length direction and vertical direction. Except for the first isoluminance ring 181, which is located in the effective light distribution area 180, the second isoluminance ring 182 and the third isoluminance ring 183 both protrude out of the effective light distribution area 180 in the vertical direction. Therefore, it can be seen that this existing vehicle lamp device wastes a lot of space outside the effective light distribution area 180 and needs to be improved. Summary of the Invention

[0007] The object of the present invention is to provide a vehicle lighting device that can improve upon at least one of the disadvantages of the prior art.

[0008] This invention relates to a vehicle lighting device suitable for projecting light rearward. It includes a substrate unit, a light-emitting unit disposed on the substrate unit, and a light guide element. The light-emitting unit provides light projected in a left-right direction. The light guide element includes a left-right extending light guide body, which includes a light-emitting portion and a reflective portion arranged rear-to-front, and a light-incident portion connecting the light-emitting portion and the reflective portion and facing the light-emitting unit. The light-emitting portion forms multiple left-right arranged light-emitting surfaces. Each light-emitting surface allows light to be emitted rearward from the light guide body of the light guide element. The convex surface of each light-emitting surface faces rearward and defines a real focal point located in front of the reflective portion. The reflective portion forms multiple left-right arranged reflective surfaces convex inward towards the light guide element. Each reflective surface is located in front of its corresponding light-emitting surface and defines a virtual focal point overlapping its corresponding real focal point. It reflects light entering the light guide element rearward toward its corresponding light-emitting surface, causing the extension lines of the reflected light to converge at the virtual focal point.

[0009] The vehicle lighting device of the present invention includes a light-emitting portion comprising a first light-emitting segment extending obliquely from front to back away from the reflector, and a second light-emitting segment extending obliquely from the first light-emitting segment from back to front toward the reflector. The light-emitting surface is formed on the first light-emitting segment and the second light-emitting segment. The reflector extends obliquely from the light-incident portion from front to back toward the second light-emitting segment and is connected to the second light-emitting segment.

[0010] In the vehicle lighting device of the present invention, the width direction of each light-emitting surface is in the same direction as the left-right direction, the length direction of each light-emitting surface is in the same direction as the up-down direction, and the convex surface of each light-emitting surface protrudes from front to back outward toward the light guide element. The length direction of each reflective surface is in the same direction as the up-down direction, the width direction of each reflective surface is in the same direction as the oblique extension direction, the oblique extension direction defines an oblique extension angle of 35 to 70 degrees with the front-back direction, and each reflective surface protrudes toward the inside of the light guide element along a convex extension direction that is transverse to the oblique extension direction, the convex extension direction defining a convex extension angle of 35 to 70 degrees with the front-back direction.

[0011] In the vehicle lighting device of the present invention, each of the reflective surfaces is a total internal reflective surface and defines a virtual focal point for each.

[0012] In the vehicle lighting device of the present invention, the virtual focal points are arranged in a straight line.

[0013] The vehicle lighting device of the present invention further includes two light-guiding side wings that extend outwards from the upper and lower sides of the light-guiding body in the vertical direction, respectively. Each light-guiding side wing includes a serrated surface facing forward and a flat surface facing backward.

[0014] The vehicle lighting device of the present invention further includes two covers that are respectively disposed on the light guide side wings in the vertical direction. Each cover includes a main cover portion that extends to the left and right to cover one of the corresponding light guide side wings, and an extension portion that extends forward from the central part of the main cover portion. Each extension portion is V-shaped with an opening facing the other extension portion and extends forward to the front of several of the reflective surfaces.

[0015] The vehicle lighting device of the present invention has two light-collecting structures arranged in a front-to-back manner and facing the light-emitting unit in the light-incident part. The light-emitting unit includes two light sources arranged in a front-to-back manner on the substrate unit, and each light source can provide light rays that enter one of the corresponding light-collecting structures.

[0016] The vehicle lighting device of the present invention includes two light-emitting units arranged one in front of the other on the substrate unit. The light-emitting portion includes a first light-emitting segment extending obliquely from front to back away from the reflector, and a second light-emitting segment extending obliquely from the first light-emitting segment towards the reflector from back to front. Light-emitting surfaces are formed on the first and second light-emitting segments. The width direction of each light-emitting surface is in the same direction as the left-right direction, and the length direction of each light-emitting surface is in the same direction as the up-down direction. The convex surface of each light-emitting surface protrudes from front to back towards the outside of the light guide element, defining a real focal point for each. The reflector extends obliquely from the light-incident portion towards the second light-emitting segment from front to back, connecting to the second light-emitting segment. The length direction of each reflector is in the same direction as the up-down direction, and the width direction of each reflector is in the same direction as the oblique extension direction. The oblique extension direction defines an oblique extension angle of 35 to 70 degrees with the front-back direction. Each reflector is a total internal reflection surface and extends along a convex extension direction intersecting the oblique extension direction towards the light guide element. The inner side of the light element protrudes and defines a virtual focal point for each of them. The protrusion direction defines a protrusion angle of 35 to 70 degrees with the front-back direction. Each virtual focal point overlaps with a corresponding real focal point and is arranged in a straight line in conjunction with other virtual focal points. The light-incident part forms two light-collecting structures arranged in a front-back direction and protruding towards the light source of the light-emitting unit. Each light-collecting structure can be illuminated by light generated by a corresponding light source. The light guide element also includes two light guide wings that protrude in opposite directions from the upper and lower sides of the light guide body, and two covers that cover the light guide wings in the upper and lower directions. Each light guide wing includes a serrated surface facing forward and a flat surface facing backward. Each cover includes a main cover that extends left and right to cover a corresponding light guide wing, and an extension that extends forward from the center of the main cover. Each extension is V-shaped with an opening facing the other extension and extends forward to the front of several of the reflective surfaces.

[0017] The advantages of this invention are as follows: the virtual focal point of each of the reflective surfaces overlaps with the real focal point of the corresponding light-emitting surface. Therefore, after the light is reflected by each of the reflective surfaces, it can produce the effect of being emitted from the real focal point of the light-emitting surface. That is, a virtual light source is formed at the corresponding real focal point, which can concentrate most of the light in the effective light distribution area, avoid light loss, reduce the light intensity required by the light-emitting unit, and reduce the waste heat generated by the light-emitting unit. Attached Figure Description

[0018] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0019] Figure 1 It is a sectional view illustrating an existing side-incident headlight assembly;

[0020] Figure 2 It is a perspective view illustrating the existing side-incident light headlight device;

[0021] Figure 3 It is a light pattern diagram, simulating the light pattern produced by the existing side-incident light headlight device;

[0022] Figure 4 This is a perspective view illustrating a first embodiment of the vehicle lighting device of the present invention;

[0023] Figure 5 This is a 3D view illustrating the first embodiment, but from a different angle. Figure 4 ;

[0024] Figure 6 This is a top view illustrating the first embodiment;

[0025] Figure 7 This is a front view illustrating the first embodiment;

[0026] Figure 8 This is a rear view illustrating the first embodiment;

[0027] Figure 9 It is a sectional view, along Figure 8 The sectional view taken by cutting along line IX-IX;

[0028] Figure 10 It is a sectional view, along Figure 6 The sectional view taken by cutting along line X-X;

[0029] Figure 11 It is a sectional view, along Figure 6 The sectional view taken by cutting along line XI-XI;

[0030] Figure 12 It is a light pattern diagram, simulating the light pattern produced by the first embodiment; and

[0031] Figure 13 This is a cross-sectional view illustrating a second embodiment of the vehicle lighting device of the present invention. Detailed Implementation

[0032] In the following description, similar or identical components will be represented by the same number.

[0033] See Figures 4 to 6 A first embodiment of the vehicle lighting device of the present invention is suitable for installation on a vehicle and can project light backward in the longitudinal direction D11 as a brake light. The vehicle is, for example, a locomotive or a car.

[0034] Since the direction of light projection will be different depending on whether the present invention is installed at the front or rear of the vehicle, the reference datum for the front-rear direction D11 in the following description of the embodiments and the claims of the present invention is based on the present invention, that is, the direction in which the light is finally projected from the present invention is defined as the rear of the present invention. However, for the convenience of the reader, the embodiments of the present invention are described in the example of the present invention being installed at the rear of the vehicle and the direction of light projection being the rear of the vehicle.

[0035] This first embodiment includes a substrate unit 2 extending along the front-back direction D11, a light-emitting unit 3 disposed on the substrate unit 2, and a light guide element 4 extending along the left-right direction D12.

[0036] The substrate unit 2 is generally rectangular in shape with its length direction aligned with the front-to-back direction D11, and serves as a circuit board. It integrates a control circuit that supplies power to the light-emitting unit 3 and controls the light-emitting unit 3. Since the structure of the substrate unit 2 is common knowledge and not the focus of this invention, overly detailed descriptions are omitted.

[0037] The light-emitting unit 3 includes two light sources 31 arranged one in front of the other at a distance from each other. Each light source 31 is a light-emitting diode (LED) and can provide light that is projected into the light guide element 4 in the left-right direction D12. Specifically, each light source 31 provides light to... Figure 6 The light rays projected from the left side of the image.

[0038] The light guide element 4 is made of transparent acrylic material, allowing light from the light source 31 to enter, travel through, and exit from the inside. The light guide element 4 includes a light guide body 5 that connects to the substrate unit 2 and extends laterally, two light guide wings 6 that protrude opposite each other from the upper and lower sides of the light guide body 5 along the vertical direction D13, and two covers 7 that cover the light guide wings 6 in the vertical direction D13.

[0039] The light guide body 5 includes a light emitting part 51 and a reflective part 52 arranged in a rear-to-front configuration, a light receiving part 53 connected between the light emitting part 51 and the reflective part 52 and facing the light emitting unit 3, and two pins 54 protruding from the front and rear sides of the light receiving part 53 respectively and used for positioning and connecting to the substrate unit 2.

[0040] See Figure 4 , 8 9. The light-emitting portion 51 includes a first light-emitting segment 511 extending obliquely from front to back away from the reflector 52, and a second light-emitting segment 512 extending obliquely from the first light-emitting segment 511 towards the reflector 52 from back to front. Specifically, the first light-emitting segment 511... Figure 9 In the diagram, the light-emitting segment 511 extends from right to left and then tilts backward, while the second light-emitting segment 512 extends from right to left and then tilts forward, connecting the first light-emitting segment 511 and the reflective part 52.

[0041] The first light-emitting section 511 and the second light-emitting section 512 cooperate to form a plurality of such Figure 8 The light-emitting surfaces 513 are arranged horizontally and staggered front to back.

[0042] Each light-emitting surface 513 has its width direction aligned with the left-right direction D12 and its length direction aligned with the up-down direction D13. Each light-emitting surface 513 is a convex surface that protrudes backward toward the outside of the light guide element 4 (auxiliary reference). Figure 10 (Illustration), and define a... Figure 9 The solid focal point P1 is shown in front of the reflector 52. The solid focal points P1 are arranged in a straight line extending left and right. Because the solid focal points P1 are arranged in a straight line, and because the light-emitting surfaces 513 are staggered, the curvature of the light-emitting surfaces 513 is slightly different in design so that the solid focal points P1 are on the same straight line.

[0043] See Figure 5 , 7 9. The reflective part 52 is derived from the light-incident part 53, such as Figure 9 As shown, it extends slightly at an angle from front to back towards the second light-emitting segment 512 and connects to the second light-emitting segment 512. Specifically, in Figure 9 In the drawing, the reflective portion 52 extends slightly obliquely from right to left and has multiple left-right arranged tooth structures 521. Each tooth structure 521 includes a reflective surface 522 whose length direction is in the same direction as the vertical direction D13 and whose width direction is in the same direction as a diagonal extension direction D21. The diagonal extension direction D21 is approximately in line with... Figure 9 The lines connecting the right front and left rear in the diagram are in the same direction. Specifically, the angle A11 defined by the oblique extension direction D21 and the front-rear direction D11 is 45 degrees. In other embodiments of the present invention, the oblique extension angle A11 can also be x degrees, where x is an integer between 35 and 70 degrees.

[0044] See Figures 9 to 11 ,in, Figure 10 It is along Figure 6 A sectional view cut along the centerline XX, and Figure 11 It is along Figure 6 A cross-sectional view taken along the centerline XI-XI. The reflective surfaces 522 are arranged alternately on the left and right, with each reflective surface 522 located in front of its corresponding light-emitting surface 513. Each reflective surface 522 is a total internal reflection surface that protrudes inward toward the light guide body 5 along a convex direction D22 perpendicular to the oblique extension direction D21, and defines a virtual focal point P2 that overlaps with its corresponding real focal point P1. The convex extension direction D22 and the front-back direction D11 define a convex extension angle A12 of approximately 45 degrees. The virtual focal points P2 are arranged in a straight line extending left and right. In other embodiments of the present invention, the convex extension angle A12 can also be y degrees, where y is an integer between 35 and 70 degrees.

[0045] The light-incident portion 53 forms two light-collecting structures 531 arranged one in front of the other and protruding toward the light source 31 of the light-emitting unit 3. Each light-collecting structure 531 is cup-shaped and allows light from its corresponding light source 31 to enter the light guide element 4. Since the construction of the light-collecting structure 531 is common knowledge and not the focus of this invention, it will not be described in detail.

[0046] See Figure 5 , 7 8, each light guide wing consists of 6 Figure 7 From the front view, it is a triangle protruding at a sharp angle in the direction opposite to the other light guide wing 6, and includes a forward-facing sawtooth surface 61 with an outer edge roughly triangular, and a... Figure 8 The plane 62 shown is facing backward and is roughly triangular in shape.

[0047] Each cover 7 includes a main cover portion 71 extending laterally to cover one of the corresponding light-guiding side wings 6, and an extension portion 72 extending forward from the central portion of the main cover portion 71. Each extension portion 72 consists of... Figure 7 From the front view, it presents a V-shape with an opening facing the other extension 72. Additionally, auxiliary parameters... Figure 6 It can be seen that each extension 72 extends forward to the front of the reflective surface 522 of one or more of the toothed structures 521 of the reflective part 52.

[0048] See Figures 9 to 11 In operation of this first embodiment, the light source 31 of the light-emitting unit 3 can be directed to the left (see reference). Figure 9 The light is projected onto the light-collecting structure 531 of the light-incident section 53 (as shown in the diagram). After entering the light guide body 5 via the light-collecting structure 531, the light will reach the reflective surface 522 of the reflective section 52 and be reflected by the reflective surface 522 toward the light-emitting surface 513.

[0049] After light is reflected by each reflective surface 522, the extensions of the reflected light rays will converge at the virtual focal point P2 of their respective reflective surfaces 522. However, as mentioned earlier, since the virtual focal point P2 of each reflective surface 522 overlaps with the real focal point P1 of its corresponding light-emitting surface 513, the light rays, after being reflected by each reflective surface 522, will produce an effect as if emitted from the real focal point P1 of the light-emitting surface 513 located in front. Furthermore, since the light rays, after being reflected by the reflective surfaces 522, appear to emerge from the real focal point P1 of the light-emitting surface 513, the light rays can be concentrated and emitted by the light-emitting surface 513, producing an effect similar to... Figure 12 The light pattern shown.

[0050] Depend on Figure 12 As can be seen from the light pattern, under the combined action of the reflective surface 522 and the light-emitting surface 513, the light is more concentrated in the legally defined effective light distribution area 80 compared to the light pattern of the prior art. Specifically, the isoluminance rings composed of the same candle (cd) are, for example, the first isoluminance ring 81, the second isoluminance ring 82, and the third isoluminance ring 83, counted outwards from the center. They are all roughly lateral ellipses whose length direction is the same as the left-right direction of the drawing, and can better fill the effective light distribution area 80. Therefore, this first embodiment has the characteristic of concentrating light in the effective light distribution area 80. Because this first embodiment can concentrate light in the effective light distribution area 80, compared to the prior art, this first embodiment only requires two light sources 31 and the light-collecting structure 531, which not only reduces material costs but also saves energy consumption and reduces waste heat generation.

[0051] It should be noted that, as those skilled in the art will know, the focal point actually has a spatial range. Therefore, the overlap between the virtual focal point P2 and the real focal point P1 can be either a complete overlap (overlap) or a partial overlap (intersection).

[0052] See Figure 7 , 9 10. The advantage of arranging the virtual focal points P2 in a straight line is that it facilitates optical design. Specifically, the curvature of the reflective surface 522 of the toothed structure 521 can be as follows: Figure 10 The designs shown are similar or identical. The characteristic of the light-guiding wing 6 is that, compared to only the area of ​​the light-emitting part 51, the serrated surface 61 and the flat surface 62 can cooperate to utilize residual light to generate two additional luminous warning areas, roughly triangular in shape, increasing the visible area noticeable by drivers in other vehicles. The cover 7 can be used to protect the light-guiding wing 6 and the light-guiding body 5.

[0053] See Figure 13 A second embodiment of the vehicle lighting device of the present invention is similar to the first embodiment, except that the light-emitting surfaces 513 of the light-emitting portion 51 are coplanar, forming a light-emitting surface group 514 that is approximately part of a cylindrical surface. Since the light-emitting surfaces 513 are coplanar, the curvature of the light-emitting surfaces 513 can be designed to be the same. Therefore, the characteristic of this second embodiment is that the structure of the light-emitting surface group 514 is relatively simple.

[0054] In summary, the advantages of the vehicle lighting device of the present invention are as follows: the virtual focal point P2 of each reflective surface 522 overlaps with the real focal point P1 of its corresponding light-emitting surface 513. Therefore, after the light is reflected by each reflective surface 522, it can produce the effect of being emitted from the real focal point P1 of the light-emitting surface 513. This allows most of the light to be concentrated in the effective light distribution area 80, avoiding light loss, reducing the light intensity required by the light-emitting unit 3, and reducing the waste heat generated by the light-emitting unit 3.

[0055] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the claims of the present invention. Equivalent variations made in accordance with the contents of the claims and specification of the present invention should also be covered by the scope of the claims of the present invention.

Claims

1. A vehicle lighting device suitable for projecting light rearward, comprising a substrate unit, a light-emitting unit disposed on the substrate unit, and a light guide element, wherein the light-emitting unit can provide light projected in a left-right direction, the light guide element includes a left-right extending light guide body, the light guide body includes a light-emitting portion and a light-reflecting portion arranged rear-to-front, and a light-incident portion connected between the light-emitting portion and the light-reflecting portion and facing the light-emitting unit, the light-emitting portion forming a plurality of left-right arranged light-emitting surfaces, each of the light-emitting surfaces allowing light to be emitted rearward from the light guide body of the light guide element, characterized in that: Each of the light-emitting surfaces has a convex surface facing rearward, and a real focal point is defined in front of the reflective part. The reflective part has a plurality of reflective surfaces arranged horizontally and convex toward the inside of the light guide element. Each reflective surface is located in front of its corresponding light-emitting surface, and a virtual focal point is defined that overlaps with its corresponding real focal point. It can reflect the light entering the light guide element backward toward its corresponding light-emitting surface, and make the extension lines of the reflected light converge at the virtual focal point.

2. The vehicle lighting device according to claim 1, characterized in that: The light-emitting portion includes a first light-emitting segment extending obliquely from front to back away from the reflective portion, and a second light-emitting segment extending obliquely from back to front towards the reflective portion from the first light-emitting segment. The light-emitting surface is formed on the first light-emitting segment and the second light-emitting segment. The reflective portion extends obliquely from the light-incident portion from front to back towards the second light-emitting segment and connects to the second light-emitting segment.

3. The vehicle lighting device according to claim 1, characterized in that: The width direction of each light-emitting surface is in the same direction as the left-right direction, the length direction of each light-emitting surface is in the same direction as the up-down direction, and the convex surface of each light-emitting surface protrudes from front to back outwards toward the light guide element. The length direction of each reflective surface is in the same direction as the up-down direction, the width direction of each reflective surface is in the same direction as the oblique extension direction, the oblique extension direction defines an oblique extension angle of 35 to 70 degrees with the front-back direction, and each reflective surface protrudes toward the inside of the light guide element along a convex extension direction that is transverse to the oblique extension direction, the convex extension direction defines a convex extension angle of 35 to 70 degrees with the front-back direction.

4. The vehicle lighting device according to any one of claims 1 to 3, characterized in that: Each of the aforementioned reflective surfaces is a total internal reflective surface and each has a defined virtual focal point.

5. The vehicle lighting device according to claim 4, characterized in that: The virtual focal points are arranged in a straight line.

6. The vehicle lighting device according to claim 1, characterized in that: The light guide element also includes two light guide wings that extend outwards from the upper and lower sides of the light guide body in the vertical direction, respectively. Each light guide wing includes a serrated surface facing forward and a flat surface facing backward.

7. The vehicle lighting device according to claim 6, characterized in that: The light guide element also includes two covers that are respectively disposed outside the light guide side wings in the vertical direction. Each cover includes a main cover portion that extends to the left and right to cover one of the corresponding light guide side wings, and an extension portion that extends forward from the central part of the main cover portion. Each extension portion is V-shaped with its opening facing the other extension portion and extends forward to the front of several of the reflective surfaces.

8. The vehicle lighting device according to claim 1, characterized in that: The light-incident portion forms two light-collecting structures arranged one in front of the other and facing the light-emitting unit. The light-emitting unit includes two light sources arranged one in front of the other on the substrate unit. Each light source can provide light rays that enter one of the corresponding light-collecting structures.

9. The vehicle lighting device according to claim 1, characterized in that: The light-emitting unit includes two light sources arranged one behind the other on the substrate unit. The light-emitting portion includes a first light-emitting segment extending obliquely from front to back away from the reflective portion, and a second light-emitting segment extending obliquely from the first light-emitting segment towards the reflective portion from back to front. The light-emitting surfaces are formed on the first light-emitting segment and the second light-emitting segment. The width direction of each light-emitting surface is in the same direction as the left-right direction, and the length direction of each light-emitting surface is in the same direction as the up-down direction. The convex surface of each light-emitting surface protrudes from front to back towards the outside of the light guide element, defining a real focal point for each. The reflective portion extends obliquely from the light-incident portion towards the second light-emitting segment from front to back, connecting to the second light-emitting segment. The length direction of each reflective surface is in the same direction as the up-down direction, and the width direction of each reflective surface is in the same direction as the oblique extension direction. The oblique extension direction defines an oblique extension angle of 35 to 70 degrees with the front-back direction. Each reflective surface is a total internal reflection surface and extends towards the inside of the light guide element along a convex extension direction that is transverse to the oblique extension direction. The light guide element has two light-collecting structures arranged in a front-to-back direction and extending towards the light source of the light-emitting unit. Each light-collecting structure can receive light generated by its corresponding light source. The light guide element also includes two light-guide side wings that extend in opposite directions from the upper and lower sides of the light guide body, and two covers that cover the light-guide side wings in the upper and lower directions. Each light-guide side wing includes a serrated surface facing forward and a flat surface facing backward. Each cover includes a main cover that extends to the left and right to cover one of the corresponding light-guide side wings, and an extension that extends forward from the center of the main cover. Each extension is V-shaped with an opening facing the other extension and extends forward to the front of several of the reflective surfaces.

Images