Vehicle lamp

Abstract

A vehicle lamp, comprising a first light-emission group (2490) and a second light-emission group (2491), wherein the first light-emission group (2490) comprises a first light source (2401), a first reflecting cup (2402) and a first lens (2403), and further comprises a first shaping reflective surface (2404), which is located between a light path of the first reflecting cup (2402) and a light path of the first lens (2403) and congruently extends in an A direction; and the second light-emission group (2491) comprises a second light source (2411), a second reflecting cup (2412) and a second lens (2413), and further comprises a refractive element (2418), which is located at the rear end of a light path of a light outlet of the second reflecting cup (2412), wherein after light, which is emitted in the optical axis direction of light emitted from the second reflecting cup (2412), is incident on the refractive element (2418) and is refracted by the refractive element (2418), an emergent direction of the light changes in the A direction relative to an incident direction of the light. The first light-emission group (2490) is used to emit a central light spot (2461), the first shaping reflective surface (2404) is used to make the central light spot (2461) form a larger illumination range and a larger illuminance gradient in a B direction, the refractive element (2418) in the second light-emission group (2491) is used to form a large-angle light spot (2462, 2463) in a horizontal direction, and the combination of the two light spots (2461, 2462, 2463) can efficiently form a far-field light spot (2461, 2462, 2463) that meets actual light distribution requirements or regulatory requirements.

Description

Car lamps Technical Field

[0001] The present invention relates to the field of lighting, and in particular to a vehicle lamp. Background Art

[0002] In the automotive lighting sector, the requirements for headlights are the most stringent, with strict regulations governing their illumination range and intensity. A schematic diagram of the structure of an automotive headlight currently on the market is shown in Figure 1. Light 121 emitted by a light source 101 is incident on a reflective surface 102, where it is reflected and converged, forming a light band at the point of convergence. The cross-sectional position of the light band is shown as 121a in Figure 1, and the light band is perpendicular to the drawing in Figure 1. A cutoff aperture 104 is located at the convergent focal point 121a and blocks a portion of the light to form a cutoff line. Light after passing through the convergent focal point 121a is incident on a lens 103, which images the light distribution in the plane of the cutoff aperture 104 (i.e., the plane of the convergent focal point) into the far field. Thus, the light band at the convergent focal point 121a forms a light band in the far field. Due to the action of the cutoff aperture 104, the edge of this far-field light band has a clear cutoff line, thus meeting regulatory requirements.

[0003] The problem with the current solution is that the light source generally uses an LED light source, which emits light at all angles. As a result, there will inevitably be light rays such as light 123 shown in the figure that are directly emitted outside the reflective surface, thereby reducing the efficiency of the system.

[0004] Summary of the Invention

[0005] To address the low efficiency of current automotive lighting solutions, the present invention proposes an automotive lighting fixture comprising a first light-emitting group and a second light-emitting group, wherein the first light-emitting group comprises a first light source, a first reflector, and a first lens. The first reflector extends congruently along direction A, comprises a light inlet and a light outlet facing each other, and comprises two facing reflective surfaces A11 and A12 between the light inlet and the light outlet. Direction B is orthogonal to direction A, and the width of the light outlet of the first reflector in direction B is b. 1-out The width of the first reflector cup light entrance in direction B is b 1-in , the distance from the light entrance to the light exit is h1, where b 1-out >b 1-in , and b 1-in +b 1-out<2h1. Light emitted by the first light source enters the first reflector through the light inlet of the first reflector. A portion of the light passes through the first reflector and exits directly through the light outlet. The remaining light is incident on the A11 or A12 reflective surface of the first reflector and is reflected therefrom before exiting through the light outlet. The first lens is an imaging lens, used to project and image the light distribution from its focal plane into the far field. Light exiting the light outlet of the first reflector enters and is projected into the far field by the first lens. The first light-emitting group also includes a first shaped reflective surface extending congruently along direction A, located between the first reflector and the first lens optical path. The first end of the shaped reflective surface is adjacent to the light outlet of the first reflector, and the second end extends toward the first lens.

[0006] The second light emitting group includes a second light source, a second reflector cup and a second lens. The second reflector cup extends congruently along the A direction. The second reflector cup includes a light inlet and a light outlet opposite to each other. There are two opposite reflective surfaces A21 and A22 between the light inlet and the light outlet. The width of the light outlet of the second reflector cup in the B direction is b. 2-out The width of the second reflector cup light entrance in direction B is b 2-in , the distance from the light entrance to the light exit is h2, where b 2-out >b 2-in , and b 2-in +b 2-out <2h2. Light emitted by the second light source enters the second reflector through the light inlet of the second reflector. A portion of the light passes through the second reflector and exits directly through the light outlet. The remaining light enters and is reflected by the A21 or A22 reflective surface of the second reflector before exiting through the light outlet. The second lens is an imaging lens, used to project and image the light distribution from its focal plane into the far field. Light exiting the light outlet of the second reflector enters and is projected into the far field by the second lens. A refractive element extending congruently along direction B is also included, located at the rear end of the optical path of the light outlet of the second reflector. Light emitted along the optical axis of the second reflector enters and is refracted by the refractive element, causing the exit direction to change relative to its incident direction in direction A.

[0007] In the above-mentioned automotive lamp, preferably, the second light-emitting group also includes a B21 reflecting surface and a B22 reflecting surface extending congruently along the B direction, and the A21 reflecting surface, the B21 reflecting surface, the A22 reflecting surface, and the B22 reflecting surface are connected to form a second reflecting channel. The light emitted by the second light source is incident from the light entrance of the second reflecting channel, and is emitted from the light exit of the second reflecting channel after propagating in the second reflecting channel. The light emitted from the light exit of the second reflecting channel is incident on the second lens and is projected to the far field by it.

[0008] In the above-mentioned automotive lamp, preferably, it also includes a second shaped reflecting surface extending congruently along direction B between the second reflective cup and the second lens optical path, the first end of the second shaped reflecting surface is close to the light outlet of the second reflective cup, and the second end extends toward the second lens.

[0009] In the above-mentioned automotive lamp, preferably, the refractive element includes a positive refractive area and a negative refractive area, and the light emitted along the optical axis direction of the second reflective cup is incident on the positive refractive area and refracted by the positive refractive area, and the exit direction is deflected toward the +A direction relative to its incident direction; the light emitted along the optical axis direction of the second reflective cup is incident on the negative refractive area and refracted by the negative refractive area, and the exit direction is deflected toward the -A direction relative to its incident direction.

[0010] In the above-mentioned automotive lamp, preferably, the first end of the first shaped reflective surface is adjacent to the +B side of the light outlet of the first reflector cup; the first light-emitting group forms a first light spot in the far field, the first light spot has a light-dark boundary, and the energy of the light on the -B side of the light-dark boundary in the first light spot accounts for no less than 80% of the total energy of the first light spot. The second light-emitting group forms a second light spot in the far field, and the energy of the light on the -B side of the light-dark boundary in the second light spot accounts for no less than 80% of the total energy of the second light spot.

[0011] In the above-mentioned vehicle lamp, preferably, a third light-emitting group is further included, the third light-emitting group includes a third light source, a third reflector cup and a third lens; the third reflector cup extends congruently along the A direction, the third reflector cup includes a relative light inlet and a light outlet, and two relative reflective surfaces A31 and A32 are included between the light inlet and the light outlet. The width of the light outlet of the third reflector cup in the B direction is b 3-out The width of the third reflector cup light entrance in direction B is b 3-in , the distance from the light entrance to the light exit is h3, where b 3-out >b 3-in , and b 3-in +b 3-out <2h3. Light emitted by the third light source enters the third reflector through the light inlet of the third reflector. A portion of the light passes through the third reflector and exits directly through the light outlet. The remaining light is incident on and reflected by the A31 or A32 reflective surface of the third reflector before exiting through the light outlet. The third lens is an imaging lens, used to project and image the light distribution on its focal plane into the far field. Light emitted from the light outlet of the third reflector enters the third lens and is projected into the far field to form a third light spot. The energy of the light on the side of the light-dark boundary -B of the third light spot accounts for no less than 80% of the total energy of the third light spot.

[0012] In the above-mentioned automotive lamp, preferably, the third light-emitting group further includes a fourth reflector located on the side of the third reflector in the -B direction, and further includes a fourth light source. The fourth reflector extends congruently along the A direction. The fourth reflector includes a light inlet and a light outlet relative to each other. The light inlet and the light outlet include two relative reflective surfaces A41 and A42. The width of the light outlet of the fourth reflector in the B direction is b. 4-out The width of the fourth reflector cup light entrance in direction B is b 4-in , the distance from the light entrance to the light exit is h4, where b 4-out >b 4-in , and b 4-in +b 4-out <2h4. Light emitted by the fourth light source enters the fourth reflector through the light inlet of the fourth reflector. A portion of the light passes through the fourth reflector and exits directly through the light outlet. The remaining light enters and is reflected by the A41 reflective surface or the A42 reflective surface of the fourth reflector before exiting through the light outlet. Light exiting the light outlet of the fourth reflector enters the third lens and is projected into the far field to form a fourth light spot. The energy of the light on the +B side of the light-dark boundary of the fourth light spot accounts for no less than 50% of the total energy of the fourth light spot.

[0013] In the above-mentioned automotive lamp, preferably, it also includes a fourth light-emitting group, which includes a laser diode, a wavelength conversion plate and a fourth lens. The laser diode emits laser, which excites the fluorescent conversion plate to generate converted light. The converted light is incident on the fourth lens and refracted by the fourth lens to form collimated light output; the collimated light forms a fifth light spot in the far field, and the energy of the light on the side of the light-dark boundary line +B of the fifth light spot accounts for no less than 50% of the total energy of the fifth light spot.

[0014] In the above-mentioned automotive lamp, preferably, the first light-emitting group further includes a fifth reflector located on the side of the first reflector in the -B direction, and further includes a fifth light source. The fifth reflector extends congruently along the A direction. The fifth reflector includes a light inlet and a light outlet relative to each other. The light inlet and the light outlet include two relative reflective surfaces A51 and A52. The width of the light outlet of the fifth reflector in the B direction is b. 5-out The width of the light entrance of the fifth reflector cup in the direction B is b 5-in , the distance from the light entrance to the light exit is h5, where b 5-out >b 5-in , and b 5-in +b 5-out<2h5. Light emitted by the fifth light source enters the fifth reflector through the light inlet of the fifth reflector. A portion of the light passes through the fifth reflector and exits directly through the light outlet. The remaining light enters and is reflected by the A51 reflective surface or the A52 reflective surface of the fifth reflector before exiting through the light outlet. Light exiting the light outlet of the fifth reflector enters the first lens and is projected into the far field to form a sixth light spot. The energy of the light on the +B side of the light-dark boundary in the sixth light spot accounts for no less than 80% of the total energy of the sixth light spot.

[0015] In the above-mentioned automotive lamp, preferably, the transversals of the A11 reflecting surface and the A12 reflecting surface on the cross section perpendicular to the direction A are transversal A11 and transversal A12 respectively, and transversal A11 is at least partially a parabola, the focus of the parabola coincides with the endpoint of transversal A12 at the light entrance, and the portion of the axis of the parabola passing through the focus on the side of the first reflector cup is inclined in a direction away from transversal A11 relative to the line connecting the centers of the light entrance and the light exit; or, transversal A11 is at least partially a parabola, and transversal A12 is a straight line; the endpoint of transversal A11 at the light entrance is point M, the symmetric point of point M about transversal A12 is point N, the focus of the parabola of transversal A11 coincides with point N, and the portion of the axis of the parabola passing through the focus on the side of the first reflector cup is inclined in a direction away from transversal A11 relative to the line connecting the centers of the light entrance and the light exit. direction; and / or, the sections of the A21 reflecting surface and the A22 reflecting surface on the cross section perpendicular to the direction A are section A21 and section A22 respectively, section A21 is at least partially a parabola, the focus of the parabola coincides with the endpoint of section A22 at the light entrance, and the portion of the axis of the parabola passing through the focus on the first reflector cup side is inclined relative to the line connecting the centers of the light entrance and the light exit toward a direction away from section A21; or, section A21 is at least partially a parabola, and section A22 is a straight line; the endpoint of section A21 at the light entrance is point M, the symmetric point of point M about section A22 is point N, the focus of the parabola of section A21 coincides with point N, and the portion of the axis of the parabola passing through the focus on the first reflector cup side is inclined relative to the line connecting the centers of the light entrance and the light exit toward a direction away from section A21.

[0016] In the present invention, the first light-emitting group is used to emit a central light spot, and the first shaping reflective surface is used to enable the central light spot to form a larger illumination range and illumination gradient in the B direction. The refractive element of the second light-emitting group is used to form a large-angle light spot in the horizontal direction. The combination of the two light spots can efficiently form a far-field light spot that meets actual light distribution needs or regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 shows a schematic structural diagram of a vehicle lamp in the prior art;

[0018] Figures 2a and 2b are schematic diagrams of the first embodiment of the present invention in two directions respectively;

[0019] FIG2c is a schematic diagram showing the working principle of the reflective cup of the present invention;

[0020] FIG2 d shows the far-field light distribution after removing the shaping reflective surface in the first embodiment of the present invention;

[0021] FIG2e shows the far-field light distribution after considering the influence of the shaping reflective surface in the first embodiment of the present invention;

[0022] FIG2 f is a schematic diagram showing the working principle of the shaping reflective surface in the first embodiment of the present invention;

[0023] FIG3 shows a schematic diagram of another embodiment of the present invention;

[0024] 4a and 4b are respectively a schematic diagram of another embodiment of the present invention and a schematic diagram of the working principle of another reflective cup;

[0025] FIG5 is a schematic diagram showing the working principle of a reflective cup according to another embodiment of the present invention;

[0026] FIG6 a shows a schematic diagram of the working principle of a shaping reflective surface according to another preferred embodiment of the present invention;

[0027] FIG6b is a schematic diagram showing far-field light distribution of the embodiment of FIG6a ;

[0028] 7a and 7b respectively show a schematic diagram of another embodiment of the present invention and a schematic diagram of its far-field light distribution;

[0029] FIG8 shows a schematic diagram of another embodiment of the present invention;

[0030] Figures 9a and 9b are schematic diagrams showing another embodiment of the present invention in two directions;

[0031] FIG9c shows a perspective view of the reflection channel in the embodiment of FIG9a;

[0032] Figures 10a and 10b are schematic diagrams showing another embodiment of the present invention in two directions;

[0033] FIG10c is a schematic diagram showing far-field light distribution of the embodiment shown in FIG10a;

[0034] FIG11a shows a schematic structural diagram of another embodiment of the present invention;

[0035] FIG11 b shows a schematic diagram of a cut-off aperture in the embodiment shown in FIG11 a ;

[0036] FIG11c shows a schematic diagram of far-field light distribution when the cut-off line stop shown in FIG11b is applied;

[0037] FIG11d is a schematic diagram showing another cut-off line aperture in the embodiment shown in FIG11a;

[0038] FIG11e shows a schematic diagram of far-field light distribution when the cut-off line stop shown in FIG11d is applied;

[0039] FIG12a is a schematic structural diagram showing another embodiment of the present invention;

[0040] FIG12b is a schematic diagram showing far-field light distribution of the embodiment of FIG12a;

[0041] Figures 13a and 13b are schematic diagrams showing another embodiment of the present invention in two directions;

[0042] FIG13c is an enlarged schematic diagram of the reflective cup, the first shaping reflective surface, and the first transmissive scattering sheet in the embodiment shown in FIG13a;

[0043] FIG14 shows a schematic structural diagram of a reflective cup and a shaped reflective surface according to another embodiment of the present invention;

[0044] 15a and 15b are respectively a schematic diagram of a cut-off aperture and a schematic diagram of far-field light distribution according to another embodiment of the present invention;

[0045] FIG15c is a schematic diagram showing the positional relationship between the cut-off aperture and the reflective cup in the embodiment shown in FIG15a;

[0046] 16a and 16b are respectively a schematic diagram of a cut-off aperture and a schematic diagram of far-field light distribution according to another embodiment of the present invention;

[0047] FIG17 a is a schematic structural diagram showing another embodiment of the present invention;

[0048] FIG17 b shows a schematic diagram of far-field light distribution of embodiment 17 a;

[0049] FIG18 is a schematic structural diagram showing another embodiment of the present invention;

[0050] FIG19 is a schematic structural diagram showing another embodiment of the present invention;

[0051] Figures 20a and 20b are schematic structural diagrams of another embodiment of the present invention in two directions;

[0052] FIG21 is a schematic structural diagram showing another embodiment of the present invention;

[0053] FIG22 is a schematic structural diagram showing another embodiment of the present invention;

[0054] FIG23 is a schematic structural diagram of a refractive element in another embodiment of the present invention;

[0055] Figures 24a and 24b are schematic diagrams showing another embodiment of the present invention in two directions;

[0056] FIG24c is a schematic diagram showing far-field light distribution of the embodiment shown in FIG24a;

[0057] Figures 25a and 25b are schematic diagrams showing another embodiment of the present invention in two directions;

[0058] FIG25 c is a schematic diagram showing far-field light distribution of the embodiment shown in FIG25 a ;

[0059] FIG26 a shows a schematic structural diagram of another embodiment of the present invention;

[0060] FIG26 b is a schematic diagram showing far-field light distribution of the embodiment shown in FIG26 a ;

[0061] FIG27 a shows a schematic structural diagram of another embodiment of the present invention;

[0062] FIG27 b shows a three-dimensional view of the integrally formed lens of the embodiment shown in FIG27 a ;

[0063] FIG27c is a schematic diagram showing far-field light distribution of the embodiment shown in FIG27a;

[0064] FIG28 shows a three-dimensional view of an integrally formed lens according to another embodiment of the present invention;

[0065] FIG29 shows a three-dimensional view of an integrally molded lens according to another embodiment of the present invention. DETAILED DESCRIPTION

[0066] The present invention provides a light-emitting device, the front view and top view of the first embodiment of which are shown in Figures 2a and 2b respectively. The light-emitting device includes a light source 201 and a reflective cup 202. The reflective cup 202 extends congruently along the A direction. The reflective cup 202 includes a relative light inlet 202c and a light outlet 202d. The light inlet 202c and the light outlet 202d include two relative A1 reflective surfaces 202a1 and A2 reflective surfaces 202a2. The B direction is orthogonal to the A direction. As shown in the figure, in Figure 2a, the A direction is perpendicular to the paper and inward, and the B direction is upward. In Figure 2b, the A direction is upward and the B direction is perpendicular to the paper and outward. The width of the light outlet 202d in the B direction is b. out , the width of the light entrance 202c in the B direction is b in , the distance from the light entrance to the light exit is h, where b out >b in , and b in +b out <2h, The light emitted by the light source 201 enters the reflective cup from the light inlet 202c of the reflective cup 202. A portion of the light passes through the reflective cup 202 and is directly emitted from the light outlet (such as the light 225 in the figure). The remaining light is incident on the A1 reflective surface or the A2 reflective surface of the reflective cup and is reflected therefrom before being emitted from the light outlet 202d. The light emitting device also includes a lens 203, which is an imaging lens for projecting and imaging the light distribution of its focal plane into the far field. The light emitted from the light outlet 202d of the reflective cup enters the lens and is projected into the far field by the lens. The effective width of the lens 203 in the B direction is L B , the focal length of lens 203 is F, The lighting device further includes a shaped reflective surface 204 extending congruently along direction A between the reflective cup 202 and the lens 203 . The first end of the shaped reflective surface 204 is close to the light outlet 202 d of the reflective cup, and the second end extends toward the lens 203 .

[0067] In this embodiment, as shown in Figure 2a, the reflector 202 extends congruently along direction A. Reflector 202 restricts the propagation direction of light in direction B. Light incident on reflective surface A1 202a1 and reflective surface A2 202a2 is reflected and redirected, exiting through light outlet 202d. A schematic diagram of the optical path of reflective surface 202 in the cross-section of Figure 2a is shown in Figure 2c. The function of reflective surface 202 will be explained in detail with reference to Figure 2c.

[0068] In this embodiment, the light source 201 is an LED, which emits light at full angles. Therefore, in FIG2c , the light source 201 emits light at full angles upward, with a half-angle of 90 degrees. This light is divided into two parts. Light with a small angle can be emitted directly from the light outlet 202d, while light with a large angle will be incident on the A1 reflective surface 202a1 or the A2 reflective surface 202a2 and reflected therefrom before being emitted from the light outlet 202d. In order to achieve the purpose of reflecting the large-angle light toward the light outlet 202d, the width of the light outlet must be greater than the width of the light inlet, that is, b out >b in In addition, a reference line 251 is formed by connecting the endpoint 202a21 of the A2 reflective surface 202a2 at the light entrance and the endpoint 202a12 of the A1 reflective surface 202a1 at the light exit. This line represents the light with the largest angle that can be emitted from the light source 201 directly from the light exit 202d without being reflected by the reflective surface. According to geometric principles, the tangent value of the inclination angle of the reference line 251 is equal to That is, as long as b is satisfied in +b out<2h, the maximum angle of light emitted from light source 201, which exits directly from light outlet 202d without being reflected by the reflective surface, can be less than 45 degrees. Simultaneously, by properly designing reflective surfaces A1 and A2, the exit angle of light at large angles reflected by reflective surfaces A1 and A2 can also be less than 45 degrees. In this way, the light emitted from light source 201 can be compressed in direction B by reflective cup 202, achieving a compressed exit angle of less than or equal to 45 degrees. There are multiple implementations for the specific design of reflective surfaces A1 and A2, which are described in detail below.

[0069] In summary, through the reasonable design of the A1 reflective surface and the A2 reflective surface, the light emitted from the light source 201, whether it is emitted directly from the light outlet 202d or emitted from the light outlet 202d after being reflected by the A1 reflective surface or the A2 reflective surface, can be made into a half-angle light emission. Compress to an angle less than 45 degrees. According to the law of conservation of optical etendue, The incident angle is the 90-degree half-angle of the LED light source, so we can get

[0070] The light emitting device further includes a lens 203, which is an imaging lens for projecting the light distribution of its focal plane and imaging it into the far field. The light emitted from the light outlet 202d of the reflector cup is incident on the lens and projected into the far field. The effective width of the lens 203 in the B direction is L B , the focal length of lens 203 is F, so the half angle of light received by lens 203 in direction B is equal to Since the angle of the light emitted from the reflective cup light outlet 202d is limited to half an angle in the B direction Within, and Therefore, the majority of light emitted from the reflector's light outlet 202d is incident within the effective aperture of lens 203, allowing it to be efficiently projected into the far field by lens 203, eliminating the light leakage issues seen in prior art. For example, light 221 is reflected once by reflective surface A2 202a2 before being incident on lens 203 and projected into the far field, forming light 222. Light 225 is emitted directly from light outlet 202d without being reflected by reflective surface A1 or A2, then incident on lens 203 and projected into the far field, forming light 226.

[0071] It should be noted that, as shown in FIG2b , the reflector 202 does not compress the light emitted by the light source 201 in direction A. Therefore, the light distribution at the reflector light outlet 202d is relatively wide in direction A. In other words, at the reflector light outlet 202d, the light presents a light distribution that is wide in direction A and narrow in direction B (because it is limited in direction B by the reflective surfaces A1 and A2). This light distribution, after being imaged by the lens 203 and projected into the far field, also forms a far-field light distribution 262 that is wide in direction A and narrow in direction B, as shown in FIG2d .

[0072] The light-emitting device also includes a shaped reflective surface 204 extending congruently along direction A, positioned between the reflector 202 and the lens 203 in the optical path. The first end of the shaped reflective surface 204 is located near the reflector's light outlet 202d, and the second end extends toward the lens 203. A portion of the light emitted from the reflector's light outlet 202d is incident on the shaped reflective surface 204. This light is reflected by the shaped reflective surface 204, changing its direction, and ultimately entering the lens 203 and projected into the far field. For example, light ray 223 in Figure 2a exits the light outlet 202d, enters the shaped reflective surface 204, is reflected by the surface, and enters the lens 203, where it is projected into the far field as light ray 224. In order to derive the light spot formed by this part of the light in the far field, the light 223 reflected by the shaped reflective surface 204 is reversed along a straight line to obtain a virtual light ray 223'. The light ray 223 can be equivalently regarded as being formed by the virtual light ray 223' emitted from the light outlet of the virtual reflective cup 202'. In other words, the light 224 projected into the far field through the lens 203 can be regarded as being emitted from the virtual reflective cup 202', and the virtual reflective cup 202' is the mirror image of the reflective cup 202 on the shaped reflective surface 204. Since the first end of the shaped reflective surface 204 is close to the light outlet 202d of the reflective cup, the virtual reflective cup 202′ and the solid reflective cup 202, which serve as mirror images, are close to each other. If the first end of the shaped reflective surface 204 is in close contact with the light outlet 202d of the reflective cup, the light outlet of the virtual reflective cup 202′ will be connected to the light outlet of the solid reflective cup 202, thereby effectively forming a larger light-emitting surface. In other words, it is equivalent to the light outlet of the reflective cup 202 in the B direction extending twice in the +B direction. The extended light energy is the light energy emitted from the solid reflective cup 202 and incident on the shaped reflective surface 204.

[0073] Therefore, the far-field light distribution at this time should be extended in the -B direction based on the light distribution in Figure 2d, as shown in Figure 2e. To avoid misunderstanding, it is worth noting that the light distribution shown in Figure 2d is the light distribution when the shaped reflective surface 204 is not included in this embodiment. In this case, the far-field light spot 262 is formed by the light emitted from the reflector cup light outlet 202d through the imaging projection of the lens 203. This light spot 262 is basically uniform. The light distribution shown in FIG2e is the light distribution when the shaping reflective surface 204 is included in this embodiment. It can be seen that among the light emitted from the reflector cup light outlet 202d, the light that is not incident on the shaping reflective surface 204 and directly incident on the lens 203 (for example, light rays 221 and 225) is imaged by the lens 203 and projected into the far field to form a light spot 262′. Meanwhile, among the light emitted from the reflector cup light outlet 202d, the light that is incident on the shaping reflective surface 204 and reflected therefrom and then incident on the lens 203 (for example, light ray 223) is imaged by the lens 203 and projected into the far field to form a light spot 264. As mentioned above, the light spot 264 can be equivalently regarded as the light emitted by the virtual reflector 202' being directly imaged and projected into the far field by the lens 203. Since the virtual reflector is close to or even connected to the real reflector, the light spot 264 formed by the virtual reflector 202' will also be close to or even connected to the light spot formed by the real reflector 202. The light spot 264 is equivalent to the extension of the light spot 262' formed by the light outlet of the real reflector 202 in the -B direction.

[0074] In Figure 2e, the density of the dot matrix represents the intensity of the illumination, with a denser array representing a higher illumination. The following explains the formation of this light distribution in conjunction with Figure 2f. For ease of analysis, the reflector's light outlet 202d is divided into two equal parts along the B direction. The half closest to the shaped reflective surface 204 is represented by light point 271, and the half further from the shaped reflective surface is represented by light point 272. Light beams with a certain angular range (representing the angular range of light emitted from light outlet 202d) are emitted from light points 271 and 272, respectively. Among the three light rays 271a, 271b and 271c emitted from the light-emitting point 271, two light rays 271b and 271c are incident on the shaping reflective surface 204, which is equivalent to two light rays 271b' and 271c' being emitted from the mirror light-emitting point 271'; at the same time, among the three light rays 272a, 272b and 272c emitted from the light-emitting point 272, only one light ray 272c is incident on the shaping reflective surface 204, which is equivalent to one light ray 272c' being emitted from the mirror light-emitting point 272'. Thus, it can be understood that in Figure 2e, spot 264a of light spot 264 formed by virtual reflector 202' is a portion of the energy split from spot 262a of light spot 262 formed by solid reflector 202, while spot 264b of light spot 264 formed by virtual reflector 202' is a portion of the energy split from spot 262b of light spot 262 formed by solid reflector 202. Furthermore, spot 264b splits more energy than spot 264a. Analysis of Figure 2f shows that the larger the size of shaped reflective surface 204 and the further its second end extends toward the reflector, the more energy the mirrored light points 271' and 272' split from the solid light points 271 and 272, and vice versa. Therefore, the illumination of spot 264 can be controlled by controlling the size of the shaped reflective surface. However, as can be understood from Figure 2f, even if the shaped reflective surface is infinitely large, the energy of spot 264 is less than half that of spot 262. Therefore, as shown in Figure 2e , the shaped reflective surface 204 creates a far-field light distribution that expands along the -B direction and gradually weakens. It's worth noting that in Figures 2e and 2f , the relative brightness values ​​of the light distribution are represented and analyzed using partitions. This is simply for convenience; in practice, the far-field light distribution can continuously weaken along the -B direction.

[0075] Although the brightness of spot 262a is slightly reduced by spot 264a due to the shaped reflective surface, the illumination is somewhat reduced. However, considering the exponential increase in the illumination range and the minimal or no decrease in illumination at the highest brightness, the light distribution shown in FIG2e is clearly more suitable for applications such as vehicle lights that require both near-field floodlighting and high-brightness illumination at a distance. That is, spots 264a, 264b, 262b, and 262a illuminate from near to far, creating a wide illumination range. Furthermore, since the darker spots illuminate closer and the brighter spots illuminate farther, the resulting road illumination is nearly uniform, resulting in a very good lighting effect. Conversely, if uniform spot illumination is used, the illumination will be too bright near the road, resulting in poor lighting effects and wasted light near the road, resulting in unnecessary energy consumption.

[0076] In summary, in this embodiment, the reflective cup 202 is used to focus the light emitted by the light source into a half angle. Within the angle range of The system can effectively collect light emitted from the light outlet of the reflector cup and project it into the far field. The shaped reflective surface near the light outlet of the reflector cup forms a mirror image virtual reflector close to the reflector cup, so that an illumination light field with a doubled area that gradually weakens in the -B direction is formed in the far field. This illumination light field is particularly suitable for application scenarios where both near and far objects are illuminated at the same time.

[0077] 2c, the preferred design method of the reflective surface A1 and the reflective surface A2 of the reflective cup 202 is introduced. As mentioned above, the width b of the light entrance of the reflective cup is in , Width of light outlet b out The distance h from the light entrance to the light exit determines that the tangent value of the maximum angle of direct light is equal to Therefore, the surface shapes of the reflective surfaces A1 and A2 of the reflective cup must also be designed to limit the maximum emission angle of light reflected from incident light at large angles. Let's take the design of reflective surface A1 202a1 as an example. The transverse lines of the A1 and A2 reflective surfaces, on a cross section perpendicular to the A direction, are transverse line A1 (also indicated by 202a1 in the figure) and transverse line A2 (also indicated by 202a2 in the figure). Transverse line A1 202a1 is a parabola, the focus of which coincides with the endpoint 202a21 of transverse line A2 202a2 at the light entrance. The axis 252 of the parabola passing through the focal point on one side of the reflective cup is tilted away from transverse line A1 202a1 relative to the line connecting the centers of the light entrance and light exit. In Figure 2c, this tilt is to the right. According to the geometric principles of a parabola, light rays 241 and 243 emitted from the parabola's focal point 202a21 and incident on the A1 reflective surface 202a1 will, after being reflected by the parabola, emerge in directions parallel to the axis of the parabola, forming emergent light rays 242 and 244, respectively. The angle of reflection of light emitted from any other part of light source 201 incident on the same point of incidence will be smaller than the angles of incidence of light rays 242 and 244. For example, light 246 in Figure 2c is emitted from the center of the light source and is incident on the same point of incidence as light 241. The angle of incidence of its reflected light 247 is necessarily smaller than that of light 242. Therefore, the angle of incidence of all light emitted from light source 201 and incident on the A1 reflective surface 202a1 is no greater than the axis 252, thus achieving angle control of the reflected light. The A2 reflective surface can be designed using the same principles as the design of the A1 reflective surface.

[0078] Assume that the angle between the axis 252 of the parabola (i.e., the A1 section of the A1 reflecting surface 202a1) passing through the focus and the line connecting the centers of the light inlet and the light outlet is K. The angle K is the maximum exit angle of all light incident on the A1 reflecting surface 202a1 emitted from the light source 201 after reflection. Preferably, That is, the maximum angle of the light reflected by the A1 reflective surface and the A2 reflective surface is equal to the maximum angle of the light directly emitted from the light source. Both angles are equal to In this way, the exit angle of all light emitted from the light source 201 after passing through the reflective cup 202 is controlled to be no greater than Angle. According to the law of conservation of optical etendue,

[0079] In this embodiment, the reflective cup extends congruently along direction A, so that the reflective surface A1 and the reflective surface A2 also extend congruently along direction A. This makes the light entrance and the light exit also extend congruently along direction A. In other words, the light entrance and the light exit include straight edges extending along direction A. This has the following advantages:

[0080] 1. If the light source uses LED, the LED's light-emitting surface is generally rectangular or square with straight edges. In this way, the straight edge of the light entrance can be aligned with the edge of the LED light-emitting area, achieving maximum efficiency while also achieving better light uniformity because there is no gap (or the gap is small).

[0081] 2. Regulations stipulate that the light distribution of headlights should be relatively wide in the horizontal direction and relatively narrow in the vertical direction, and a light-dark dividing line extending in the horizontal direction is required to avoid glare to other drivers. Using a straight edge of the light outlet extending along the A direction to achieve this light-dark dividing line is very suitable and efficient.

[0082] In this embodiment, the second end of the shaped reflective surface 204 extends along the optical axis of the reflector toward the lens. That is, the distance from the second end of the shaped reflective surface to the optical axis of the reflector is equal to the distance from the first end to the optical axis of the reflector. This creates a mirrored virtual reflector 202' that is parallel to the physical reflector 202, resulting in a larger equivalent spot size. In another embodiment of the present invention, as shown in FIG3 , unlike the embodiment shown in FIG2a , the distance from the second end of the shaped reflective surface 304 to the optical axis of the reflector 302 is greater than the distance from the first end to the optical axis of the reflector 302. This creates a mirrored virtual reflector 302' further away from the lens 303. This advantage is that the presence of the shaped reflective surface 304 has minimal effect on the angle of light emitted from the reflector 302. The energy of light emitted from the reflector 302 incident on the shaped reflective surface 304 is also relatively small. In other words, the virtual reflector 302' receives less light energy, which facilitates the formation of a more pronounced illumination gradient in the far field.

[0083] Based on the above two embodiments, it can be seen that preferably, the distance from the second end of the shaped reflective surface to the optical axis of the reflector cup is not less than the distance from the first end to the optical axis of the reflector cup. Of course, in actual applications, the distance from the second end of the shaped reflective surface to the optical axis of the reflector cup may be less than the distance from the first end to the optical axis of the reflector cup, which will be explained in the next embodiment.

[0084] Figure 4a shows a schematic diagram of the structure of another embodiment of the present invention. In this embodiment, the distance from the second end of the shaped reflective surface 404 to the optical axis of the reflector 402 is shorter than the distance from the first end to the optical axis of the reflector 402. In this case, the shaped reflective surface 404 is relatively short to avoid excessively affecting the light emitted by the reflector 402. This is useful for applications where the illumination area does not need to be large and relatively uniform illumination is required.

[0085] This embodiment differs from the embodiment shown in FIG2a in that it utilizes a different structure to form the reflector 402. A schematic diagram of the optical path principle of this reflector 402 is shown in FIG4b. In this embodiment, the transverse lines of the A1 reflective surface 402a1 and the A2 reflective surface 402a2, on a cross section perpendicular to the A direction, are referred to as transverse lines A1 and A2, respectively. Transverse line A1 is a parabola (also indicated by 402a1 in the figure), and transverse line A2 is a straight line (also indicated by 402a2 in the figure). The endpoint of transverse line A1 402a1 at the light entrance is point M, and the symmetric point of point M with respect to transverse line A2 402a2 is point N. The parabola's focal point coincides with point N. The portion of the parabola's axis 452 passing through focal point N on one side of the reflector is tilted away from transverse line A1 402a1 relative to the line connecting the centers of the light entrance and light exit, i.e., tilted to the right in FIG4b. For the convenience of analysis, in FIG4 b , the solid arrows represent actual light rays, the dashed arrows represent the mirror light rays of the actual light rays, and the numbers are the corresponding solid light rays followed by a ' symbol.

[0086] Observe the three light rays 440, 444, and 447 emanating from the left endpoint M of light source 401 (i.e., the endpoint of A1 section 402a1 at the light entrance). These three light rays are incident on A2 section 402a2 and reflected. The reflected light rays 441, 445, and 448 are equivalent to the straight-line propagation of light rays 440', 444', and 447' emanating from point N, the mirror image of point M. Light rays 441 and 445 are incident on A1 reflective surface 402a1. Since point N is the focus of parabola (A1 reflective surface) 402a1, light rays 441 and 445, after reflection from A1 reflective surface 402a, emerge parallel to the parabola's axis 452 as parallel light rays 442 and 446. Light 446 emerges directly, while light 442, incident on the plane of A2 section, emerges as light 443. Light 443 emerges at the same angle as light 442. Therefore, the light rays reflected from point M through the A1 reflective surface 402a all emerge from the light outlet at a certain angle K. It is easy to deduce that the emission angle of light emitted from any point of the light source after being reflected by the A1 reflective surface 402a1 is not greater than the K angle. Therefore, the angle control of the reflected light is achieved. On the other hand, more preferably, the angle between the line from the focus N of the A1 section 402a1 to the end point of the A1 section at the light outlet and the line from the light inlet to the center of the light outlet is also equal to the K angle. For example, light 448 is not incident on the A1 reflective surface but is directly emitted from the upper edge of the A1 reflective surface. This light ray is equivalent to the light ray 447' emitted from point N and directly emitted from the light outlet. Its emission angle is also equal to K. Therefore, the emission angle of any light ray emitted directly from the light source 401 is less than or equal to the K angle. In this way, similar to the embodiment shown in Figure 2c, by controlling b in 、b outBy properly designing the A1 reflective surface and the dimensions of the reflector 402, the reflective cup 402 can control the angle of the emitted light.

[0087] The present invention illustrates preferred design methods for the reflective surfaces A1 and A2 of a reflector cup using the two embodiments shown in Figures 2c and 4b. However, in practice, other design methods are possible, which are not fully enumerated here. As long as the reflective cup's dimensions a, b, and h meet the requirements of the present invention, it falls within the scope of protection of the present invention. For example, continuously curved reflective surfaces, such as those shown in Figures 2c and 4b, may present machining difficulties. In practice, as shown in Figure 5, the cross-section of at least one of the reflective surfaces A1 502a1 and A2 502a2 of the reflector cup 502 in the first cross-section may be formed by splicing multiple broken lines. Taking the A1 reflective surface 502a1 as an example, its cross-section perpendicular to the A direction (also indicated by 502a1 in the figure) is composed of multiple broken lines 502a1a, 502a1b, and 502a1c. This makes processing easier. The principle is to use multiple broken lines to simulate the A1 cross-section of the parabola shown in Figure 2c. The endpoints of the multiple broken lines 502a1a, 502a1b, and 502a1c all lie on the parabola. Although this may cause some deviation in the control of the output light angle, it is acceptable in practice.

[0088] As can be seen from the description of the above embodiment, the shaped reflective surface plays an important role in the implementation principle of the present invention. The above embodiment does not limit or describe the extension length of the shaped reflective surface toward the lens. In another preferred embodiment of the present invention, the extension length of the shaped reflective surface toward the lens is described in conjunction with the schematic diagram of Figure 6a. In this embodiment, the cross-sections of the A1 reflective surface 602a1, the A2 reflective surface 602a2, and the shaped reflective surface 604 of the reflective cup 602 in the cross section perpendicular to the direction A are the A1 cross-section (also indicated by 602a1), the A2 cross-section (also indicated by 602a2), and the shaped cross-section (also indicated by 604). The first end of the shaped cross-section 604 is close to the endpoint of the A1 cross-section 602a1 at the light outlet. The angle α (marked in the figure) between the line connecting the second end 604a of the shaped cross-section 604 and the endpoint 602a22 of the A2 cross-section 602a2 at the light outlet and the line connecting the centers of the light outlet and the light entrance of the reflective cup 602 is formed. This limits the extension length of the second end of the shaped reflective surface toward the lens. The following is a detailed explanation. According to the above description of the reflective surface A1 of the reflective cup, it can be known that through reasonable design, the luminous half angle of the light emitted from the light-emitting surface 602d of the reflective cup 602 can be controlled within within, For example, the adjacent light rays 642 and 643 emitted from the left end point 601a1 of the light source 601, the light 642 is emitted directly from the upper edge 602a22 of the A2 reflective surface, and the angle between the light 642 and the optical axis is The light 643 is incident on the upper edge 602a22 of the reflective surface A2 and is reflected. The angle between the reflected light 642 and the optical axis is also That is to say, the light outlet 602d of the reflective cup 602 can be regarded as a light emitting half angle of In this embodiment, the luminous half angle of another light ray 641 emitted from the left end point 601a1 of the light source 601 after being reflected by the A2 reflective surface is also It happens to be incident on the second end 604a of the shaped reflective surface and is reflected by it. The mirror image light 641' of light 641 is equivalently emitted from the light outlet of the virtual reflective cup 602'. Because light 641 is the light with the largest angle emitted by the reflective cup, and because it is incident on the second end 604a of the shaped reflective surface, it can be determined through analysis that light 641 is the light that can be incident on the rightmost side of the shaped reflective surface (i.e., the light farthest in the +B direction). In other words, its mirror image light 641' is the light emitted from the virtual reflective cup 602' at the leftmost side (i.e., the light farthest in the -B direction). If the light outlet 602d of the reflective cup 602 is divided into two parts 602d1 and 602d2 along direction B, as shown in the figure, the light emitted from the part 602d1 cannot be incident on the shaped reflective surface 604, while the light emitted from the part 602d2 can be incident on the shaped reflective surface 604. In other words, the equivalent part 602'd2 of the virtual reflective cup 602' can emit light (this part of light is the light emitted from the part 602d2 and incident on the shaped reflective surface 604), while no light is emitted from the part 602'd1 of the virtual reflective cup 602'. Therefore, the light distribution formed in the far field is shown in Figure 6b. The light emitted from section 602d1 of the reflector 602's light outlet corresponds to spot 662a, the light emitted from section 602d2 of the reflector 602's light outlet corresponds to spot 662b, and the light emitted from section 602'd2 of the virtual reflector 602''s light outlet corresponds to spot 664b. The light emitted from section 602'd2 of the virtual reflector 602''s light outlet is the light emitted from section 602d2 of the reflector 602''s light outlet and incident on the shaped reflective surface. Its energy is obviously less than half of the total energy of the light emitted from section 602d2. Therefore, the illuminance of spot 664b is lower than that of spot 662b. Furthermore, since the light emitted from section 602d1 of the reflector 602's light outlet is not affected by the shaped reflective surface 604, the illuminance of spot 662a is the same as that without the shaped reflective surface, and does not decrease.

[0089] In this embodiment, since the length of the second end of the shaping reflective surface 604 extending toward the lens is limited, the illumination of the portion 662a of the far-field light spot that illuminates the far end is maintained at a maximum, thereby achieving the best long-range effect. It can be understood from FIG6a that as the second end 604a of the shaping reflective surface 604 continues to extend toward the lens (upward in the figure), the angle α between the second end 604a of the shaping section 604 and the endpoint 602a22 of the A2 section 602a2 at the light outlet and the line connecting the light outlet and the center of the light inlet of the reflective cup 602 will become smaller, and the proportion of light incident on the shaping reflective surface in the light emitted from the light outlet 602d of the reflective cup will increase, and the corresponding far-field light spot will gradually extend in the -B direction. When α becomes smaller than the angle α of the line connecting the second end 604a of the shaping section 604 and the endpoint 602a22 of the A2 section 602a2 at the light outlet will become smaller. At the same time, part of the light emitted from any position of the light outlet of the reflector cup is incident on the shaped reflective surface. In theory, the edge illumination of the far-field light spot in the +B direction can still be kept at the maximum. At this time, the size of the far-field light spot in the B direction reaches the maximum. When the second end 604a of the shaped reflective surface 604 continues to extend toward the lens, At this time, the far-field light spot no longer grows, and the brightest point of the far-field light spot also begins to weaken. At this time, the far-field spot size and the maximum illumination reach a relatively good balance. At this time, the shaping reflective surface does not reduce the angle of the light emitted from the reflective cup (it is still half angle). ), and due to In this way, the lens can still efficiently collect the light emitted from the reflective cup and reflected from the shaped reflective surface.

[0090] Of course, in practical applications This is also a possible situation, because at this time although the far-field light spot no longer increases, the proportion of light from the virtual reflector cup will increase, that is, the uniformity of the far-field light spot is increased.

[0091] In another embodiment of the present invention, as shown in FIG7a , unlike the embodiment shown in FIG2a , in direction B, the center 702dc of the light outlet of the reflector 702 is not on the centerline Bc of the lens 703, and in direction B, the shaped reflective surface 704 is located on the side of the reflector 702 away from the centerline Bc of the lens. This has the advantage that, as shown in FIG7b , the far-field light spot (including the light spot formed by the light outlet of the reflector 702 and the light spot formed by the light outlet of the virtual reflector 702') is concentrated on one side relative to the centerline Bc in direction B. In automotive lighting applications, this means that light above the horizontal line is very weak or absent, thus providing an anti-glare effect.

[0092] In the embodiment shown in Figure 7a, the reflector and the shaped reflective surface are offset as a whole toward the +B direction. This has the advantage of shifting the far-field light spot toward the -B direction, thereby reducing / preventing glare. However, this may also cause light emitted by the reflector in the +B direction to be emitted outside the lens (i.e., unable to enter the effective aperture of the lens), resulting in reduced efficiency. To address this issue, in another embodiment shown in Figure 8, the reflective channel and the shaped reflective surface are deflected as a whole so that the optical axis of the entire emitted light passes through the center of the lens. This allows as much light as possible to enter the effective aperture of the lens, thereby improving collection efficiency.

[0093] In the aforementioned embodiment, the reflective surfaces A1 and A2 of the reflective cup extend congruently along direction A and control the light's angle in direction B, while not limiting the light's angle in direction A. In practical applications, however, it is also meaningful to limit the angle or aperture of light emitted in direction A so that it can be fully utilized. Therefore, in another embodiment of the present invention, as shown in Figures 9a and 9b , unlike the embodiment shown in Figures 2a and 2b , in addition to the reflective cup 902 including an A1 reflective surface 902a1 and an A2 reflective surface 902a2 extending congruently along direction A, the light-emitting device also includes a B1 reflective surface 902b1 and a B2 reflective surface 902b2 extending congruently along direction B. The A1 reflective surface 902a1, the B1 reflective surface 902b1, the A2 reflective surface 902a2, and the B2 reflective surface 902b2 are connected to form a reflective channel 902. Light emitted by the light source 901 enters the reflective channel through a light inlet, propagates through the reflective channel, and exits through a light outlet of the reflective channel 902. The preferred design method for the B1 reflective surface and the B2 reflective surface is the same as the design method for the A1 reflective surface and the A2 reflective surface, and will not be further described here. In this way, the luminous angle of the light emitted from the light source 901 in the B direction is limited by the A1 reflecting surface and the A2 reflecting surface (as shown in Figure 9a), and the luminous angle in the A direction is limited by the B1 reflecting surface and the B2 reflecting surface (as shown in Figure 9b). In this way, the angle limitation of the light in two orthogonal directions is achieved through the reflection channel 902, so that the light emitted from the reflection channel can be collected by the lens as much as possible, thereby improving efficiency.

[0094] The aforementioned embodiment does not describe the specific implementation of the A1 and A2 reflective surfaces. Of course, they can be implemented using methods similar to aluminum-plated or silver-plated reflective mirrors. Another difference of this embodiment is that the reflective channel 902 is a transparent material entity. As shown in Figure 9c, the A1 reflective surface 902a1, the B1 reflective surface 902b1, the A2 reflective surface 902a2, and the B2 reflective surface 902b2 are all smooth surfaces on the side of the transparent material entity. After the light emitted by the light source enters the reflective channel from the light inlet of the reflective channel, part of the light is incident on the smooth surface of the side of the transparent material entity and undergoes total reflection. The advantage of this is that it is easy to process, all reflective surfaces are integrally formed, and because it is total reflection, the reflectivity is close to 100%. The disadvantage of the solid reflective channel 902 is that the solid lens material has a certain absorption of light, which is generally acceptable in practical applications. Another advantage of using a transparent reflective channel 902 is that, preferably, the first end of the shaped reflective surface 904 can be in close contact with the light outlet of the reflective channel. This creates a mirrored virtual reflective channel (reflective cup) that is also in close contact with the physical reflective channel, resulting in a continuous far-field light distribution without gaps. However, if the reflective channel is formed by a silver-plated or aluminum-plated reflector, since any reflective surface has a certain thickness, the shaped reflective surface 904 can only be in close contact with the rear of the reflective surface at the closest point, and must be a certain thickness away from the reflective surface.

[0095] In this embodiment, the reflective channel 902 is a transparent material entity, which also brings a problem, that is, the distance h from the light entrance to the light exit of the A1 reflective surface and the A2 reflective surface must be A , which is equal to the distance h from the light entrance to the light exit of the B1 and B2 reflective surfaces B , that is, h A =h B According to the design method of the A1 reflective surface and the A2 reflective surface, h A It is the angle that needs to be limited according to the B direction, b in 、b out The size is reasonably designed and cannot be adjusted at will; the same h B It is based on the angle that needs to be limited in direction A and the width a of the light outlet in direction A. out , the width of the light entrance in direction A is a in For example, in this embodiment, since the width of the light source 901 in the B direction is smaller than its width in the A direction, even if the reflection channel controls the same luminous angle in the A and B directions, h A is also smaller than h B of.

[0096] In order to make the reflection channel have the same height in the A and B directions, in this embodiment, the reflection channel further includes an A1 extension surface 902a1L and an A2 extension surface 902a2L extending congruently along the A direction. The A1 extension surface 902a1L and the A2 extension surface 902a2L are both planes. The A1 extension surface 902a1L is located on the side of the A1 reflection surface 902a1 away from the light source and is connected to the A1 reflection surface 902a1. After the two are connected, the total height perpendicular to the A and B directions is equal to h B The A2 extension surface 902a2L is located on the side of the A2 reflection surface 902a2 away from the light source and is connected to the A2 reflection surface 902a2. The total height of the two connected in the directions perpendicular to A and B is equal to h B More specifically, the A1 reflective surface 902a1 extends toward the lens to form a plane 902a1L, and the A2 reflective surface 902a2 extends toward the lens to form a plane 902a2L. The total length after extension is equal to h B In the B direction, the light emitted from the light outlets of the A1 reflective surface and the A2 reflective surface will be directly reflected and propagated on these two extended reflective surfaces. This reflection and propagation process has little effect on the luminous angle (if the two extended reflective surfaces are parallel to each other, the luminous angle will not be affected at all. Considering that a draft angle needs to be left in the actual injection molding process, the two extended reflective surfaces are not completely parallel, and their effect on the luminous angle is also very small). Therefore, the light emitted from the light outlets of the extended planes 902a1L and 902a2L can be regarded as being in the same state as the light emitted from the light outlets of the A1 reflective surface and the A2 reflective surface, that is, having the same luminous angle. This solves the problem that the height of the reflection channel in the A and B directions must be the same.

[0097] In this embodiment, preferably, the design method of the B1 and B2 reflective surfaces is the same as the design method of the A1 and A2 reflective surfaces. Of course, the B1 and B2 reflective surfaces can also be designed using different methods. For example, the B1 and B2 reflective surfaces are relatively parallel planes. Although this cannot achieve the purpose of limiting the luminous angle in direction A (because reflection between two parallel planes cannot change the angle), it still relies on the reflection on the B1 and B2 reflective surfaces to suppress the diffusion of the luminous aperture in direction A. For another example, the B1 and B2 reflective surfaces are relatively planes with a certain inclination angle, which can also achieve the purpose of compressing the luminous angle.

[0098] In the embodiment shown in FIG9a and FIG9b, by rationally designing the B1 reflective surface 902b1 and the B2 reflective surface 902b2 of the reflective channel 902, the emission angle in the A direction can be compressed so that the light emission half angle in the A direction is At the same time, through the reasonable design of the A1 reflective surface 902a1 and the A2 reflective surface 902a2 of the reflection channel, the emission angle in the B direction can be compressed so that the luminous half angle in the B direction is In this embodiment, Since the larger the luminous angle, the larger the lens diameter is required to receive the light, the width of the lens 903 in the A direction is equal to its width in the B direction, so that the light emitted by the reflection channel 902 can be received in both directions A and B. In this embodiment, the width of the light source 901 in the A direction is greater than its width in the B direction, that is, the width of the light entrance of the reflection channel a in >b in , and if Then there must be a out >b out . And because Therefore h B >h A Therefore, it is necessary to use the A1 extension surface 902a1L and the A2 extension surface 902a2L to make the height of the reflection channel in the A and B directions equal.

[0099] In practical applications, the luminous angle of the reflection channel in the B direction may not be equal to the luminous angle in the A direction, that is, For example At this time, the width of the lens in direction A can be smaller than its width in direction B, forming a long strip of light outlet shape, which has a more technological feel. There are two cases to discuss here. The first case is that the width of the light source in direction A and direction B is equal, that is, a in =b in .because a out >b out , so h B >h A In this case, it is still necessary to use the A1 extension surface and the A2 extension surface to make the height of the reflection channel equal in the A and B directions. And a in =b in , then h A >h B In this case, it is obvious that the B1 extension surface and the B2 extension surface need to be used to make the height of the reflection channel equal in the A and B directions. The second case is that the width of the light source in the A direction is smaller than its width in the B direction, that is, a in in , then h cannot be determined at this time A and h B The relative size of h A =h B ​For example, a in 1mm, b in 2mm, is 15 degrees, then a out 3.86mm, h B is 9.07mm. is 22 degrees, then b out 5.34mm,h A It is also 9.07mm, which is h A =h B . In this case, there is no need to extend the surface.

[0100] In summary, whether to use the extended surface depends on the actual design requirements. A ≠h B , it is necessary to use an extension surface in the smaller direction to make the height of the reflection channel in the A and B directions equal. If h A =h B , then there is no need to use an extension surface. In the specific design, a preferred solution is to reflect the luminous angle of the channel in the B direction Not equal to its luminous angle in direction A This is conducive to achieving a long strip-shaped lamp shape. Whether the extended surface is needed at this time is related to the dimensions of the light source in the A and B directions.

[0101] The structural schematic diagram of another embodiment of the present invention is shown in Figures 10a and 10b. Different from the embodiment shown in Figures 9a and 9b, in this embodiment, as shown in Figure 10b, it also includes a second shaping reflective surface 1005 extending congruently along the B direction between the reflection channel 1002 and the optical path of the lens 1003. The first end of the second shaping reflective surface 1005 is close to the light outlet of the reflection channel 1002, and the second end extends toward the lens 1003. As can be seen from the comparison between Figure 10b and Figure 9b, in this embodiment, the width of the lens 1003 in the A direction is significantly reduced, which causes the light emitted from the reflection channel 1002 to be incident outside the lens in the A direction. For example, if there is no reflection of the second shaping reflective surface 1005, the light 1021 will not be collected by the lens like the light 1021', and the condition is not satisfied at this time. in is the luminous half angle of the reflection channel in the A direction, L A is the effective width of the lens in the A direction. A drastically reduced, making Therefore, much of the light emitted from the reflection channel in direction A will not be collected by the lens.

[0102] Second shaping reflective surface 1005 solves this problem. For example, light 1021 is reflected by second shaping reflective surface 1005 to form light 1022, which then enters the aperture of lens 1003 and exits as light 1023. Using the aforementioned analysis method, it can be seen that the virtual light 1022' obtained by inverting light 1022 can be equivalently considered to be emitted from virtual reflection channel 1002'. In other words, the light outlet of virtual reflection channel 1002' can be equivalently considered to be an extension of the physical reflection channel 1002 in the +A direction. Therefore, the light spot formed in the far field correspondingly expands in the -A direction. A schematic diagram of the far-field light distribution of this embodiment is shown in Figure 10c. As shown in Figure 10c, light spot 1062, located in the middle of direction A, is formed when light emitted from the reflection channel in direction A directly enters the lens without passing through the second shaping reflective surface and is imaged and projected to the far field by the lens. The illuminance gradient formed by light spot 1062 in direction B is the result of the action of shaping reflective surface 1004 in direction B, which will not be further explained here. Furthermore, due to the action of second shaping reflective surface 1005 in direction A, virtual reflection channel 1002' forms an extended light spot 1063 in direction -A. The illuminance of extended light spot 1063 is lower than that of light spot 1062, and the illuminance decreases with distance in the -A direction. Therefore, the extended light spot 1063, formed by the combined action of shaping reflective surface 1004 and second shaping reflective surface 1005, exhibits a decaying illuminance gradient in both the -A and -B directions, significantly expanding the illumination range while maintaining essentially no decay in the brightest illuminance of the entire light distribution. Furthermore, this embodiment also includes a third shaping reflective surface 1006. The third shaping reflective surface 1006 is close to the light outlet of the reflection channel in the -A direction. Accordingly, a virtual reflection channel 1002" connected to the physical reflection channel 1002 is formed in the -A direction, and an extended light spot 1064 is formed in the +A direction of the far field. The extended light spot 1064 formed by the simultaneous action of the shaping reflective surface 1004 and the third shaping reflective surface 1006 has an attenuated illumination gradient in both the +A direction and the -B direction, thereby significantly expanding the illumination range again.

[0103] In this embodiment, in the B direction, the width L of the lens 1003 is B It is larger and can accept light at a larger angle, and the luminous angle of the reflection channel 1002 in the B direction can match it, that is, in is the half angle of the light emission of the reflection channel in the B direction. The shaping reflection surface 1004 does not change the light emission angle range of the reflection channel much. In the A direction, the width L of the lens 1003 is A Significantly smaller than L B, can only receive light with a smaller angle in direction A, and the reflection channel has difficulty in compressing the luminous angle in direction A to be very small, so the luminous angle of the reflection channel in direction A does not match the receiving angle of the lens 1003, that is, in In order to reflect the luminous half angle of the channel in direction A, the second shaping reflection surface and the third shaping reflection surface can utilize the light in direction A that originally cannot enter the lens to form an extended light spot in direction A, thereby expanding the illumination area.

[0104] It is worth noting that in the description of the present invention, directions A and B are orthogonal to each other. Direction A generally refers to the horizontal direction, while direction B refers to the vertical direction. However, A and B are merely codes and can be interchanged or refer to other directions. As long as A and B are orthogonal to each other, they fall within the scope of protection of the present invention.

[0105] In the above embodiment, the shaping reflective surface, the second shaping reflective surface, and the third shaping reflective surface are all planar. This is because planar reflectors facilitate the description of the equivalent virtual reflective cup and virtual reflective channel. In practice, the shaping reflective surface can also be curved, which can also form an extended light spot in the far field. The extended light spot of the virtual reflective cup formed by a planar shaping reflective surface is the same width as the extended light spot of a solid reflective cup (because the virtual reflective cup and the solid reflective cup are mirror images). However, a curved shaping reflective surface can form a wider extended light spot, thereby forming a larger illumination range, which will be explained in the next embodiment.

[0106] Before describing another embodiment, it should be noted that the terms "shaped reflective surface," "second shaped reflective surface," or "Xth shaped reflective surface" in the description of the present invention actually all fall under the category of shaped reflective surfaces and are simply used to distinguish them in the description. Furthermore, various embodiments of the present invention frequently mention "reflective channel" and "reflective cup." As can be seen from the above description, the reflective channel is formed based on the reflective cup. The difference lies in that the reflective cup restricts the light angle in one direction, while the reflective channel restricts the light angle in two orthogonal directions. Therefore, the reflective channel is also a type of reflective cup, albeit a more complex form. Therefore, when referring to a reflective channel or a reflective cup in the description of the present invention, we are referring to the "reflective cup," an optical device that compresses the light angle of a light source.

[0107] FIG11 a is a schematic structural diagram of another embodiment of the present invention, which differs from the embodiment shown in FIG10 a in the following aspects:

[0108] 1. That is, the luminous half angle of the reflection channel 1102 in the B direction Much larger than the half angle of the light received by lens 1103 in direction B For example, light 1123, originally emitted from outside lens 1103 (indicated by the dotted line in Figure 11a), is reflected back into the aperture of lens 1103 by incident on shaping reflective surface 1104. Another light 1125 is also reflected by shaping reflective surface 1104 and returns to the aperture of lens 1103.

[0109] 2. Reflecting surface 1104 is not a flat surface, but rather a curved surface that convexly extends away from the reflector cup. This has the advantage of forming a wider, extended light spot in direction B. Reversing ray 1123 yields virtual ray 1123', which can be considered equivalent to emanating from virtual light point 1123s. Reversing ray 1125 yields virtual ray 1125', which can be considered equivalent to emanating from virtual light point 1125s. Since the shaped reflective surface 1104 is a curved surface convex away from the reflective cup, it does not form a virtual reflective cup that is mirrored with the light outlet of the reflective cup 1102. Instead, it can be regarded as a collection of virtual light points such as 1123s and 1125s. The width of the coverage area of ​​these virtual light points in the B direction is obviously greater than the width of the light outlet of the physical reflective cup 1102 in the B direction. This is because the shaped reflective surface 1104 is a curved surface convex away from the reflective cup, which has the magnifying effect of a concave reflector on the virtual image of the incident light.

[0110] 3. The first end of the shaped reflective surface 1104 is close to the reflective cup 1102 in the +B direction, while the second end extends toward the lens 1103. The second end extends to the edge of the effective aperture of the lens 1103, and the extension length exceeds the embodiment shown in Figure 10a. The effect of the extension length of the shaped reflective surface has been described in the embodiment shown in Figure 6a. That is, the first end of the shaped section line is close to the endpoint of the A1 section line at the light outlet. The angle α between the line connecting the second end of the shaped section line and the endpoint of the A2 section line at the light outlet and the line connecting the center of the reflective cup light outlet and the light inlet is α. satisfy It is possible to achieve that the shaped reflector has no effect on the angle range of the light emitted from the reflector. However, in this embodiment, since the emitting angle of the reflector is greater than the receiving angle of the lens, it is necessary to That is, the shaped reflective surface is used to reduce the luminous angle to match the receiving angle of the lens, so as to ensure that all light is incident within the lens aperture as much as possible.

[0111] 4. The reflector cup 1102 and the shaped reflective surface 1104 are considered as a whole, and the light-emitting angle of this whole matches the light-collecting angle of the lens 1103. Because the shaped reflective surface 1104 affects the angular distribution of light, the light-emitting angle of the reflector cup-shaped reflective surface combination is not symmetrical. Therefore, in this embodiment, the reflector cup-shaped reflective surface combination is rotated toward the lens and toward the shaped reflective surface, so that the central ray of the emitted light from this combination coincides with the center of the lens. This ensures that as much of the emitted light as possible is incident within the aperture of the lens 1103.

[0112] 5. The center of the light outlet of the reflector 1102 is not on the centerline Bc of the lens. The shaped reflective surface 1104 is located on the side of the reflector 1102 away from the centerline Bc. This has the advantage of keeping the light spot below the horizontal, preventing glare for oncoming vehicles and pedestrians. In this embodiment, a cutoff aperture 1107 extending along direction A is located on the reflective surface 1102a2 at the edge of the reflector's light outlet. A schematic diagram of this cutoff aperture is shown in Figure 11b. The edge of this cutoff aperture 1107 includes a first straight edge 1107a and a second straight edge 1107b that is parallel to and offset from the first straight edge. The first straight edge 1107a extends deeper into the light outlet than the second straight edge 1107b. The first and second straight edges are connected at their junction by a short edge 1107c. The angle between this short edge and the first and second straight edges is less than 55 degrees and greater than 35 degrees. The resulting far-field light distribution is shown in Figure 11c. It can be seen that the light distribution has a wider range in the B direction than that in Figure 10c (because the range of the virtual light point is wider), and there is an illumination gradient in the B direction (the illumination gradient is shown as four grids in the figure for convenience of representation; it should actually be a basically continuous distribution). The light distribution is mainly concentrated below the horizontal line Bc, and the edge near the horizontal line forms the shape of the edge of the cutoff aperture, which is the requirement of automobile low-beam lighting. According to the requirements of automobile low-beam lighting, there is another form of cutoff aperture, as shown in Figure 11d. The edge of the cutoff aperture 1107 includes a first straight edge 1107a and an oblique edge 1107b intersecting with the first straight edge 1107a. The angle between the oblique edge 1107b and the first straight edge 1107a is greater than 65 degrees and less than 85 degrees. The first straight edge 1107a extends deeper into the interior of the light outlet than the oblique edge 1107b. The far-field light distribution thus generated is shown in Figure 11e.

[0113] The lens aperture is mentioned several times throughout the description of this invention. This refers to the effective aperture, which is the aperture of the lens when combined with other components of the invention. In actual applications, some lenses may have a frame for fixation. This frame does not play an optical role and is therefore not included in the calculation of the effective aperture. Some lenses may be molded together with other lenses, forming a single large optical element. However, the original lens still functions in this area, and the other lenses or optical components do not count towards the effective aperture.

[0114] In the description of the present invention, since the optical principle of the two directions A and B is to be described, the optical principle of the two directions A and B is to be described. When using symbols such as α, sometimes A is used as a subscript to indicate the angle in the direction of A, and sometimes B is used as a subscript to indicate the angle in the direction of B. Sometimes no subscript is used, and the context should be used to determine whether it refers to the direction of A or the direction of B.

[0115] The structural diagram of another embodiment of the present invention is shown in FIG12a, and the far-field light distribution diagram thereof is shown in FIG12b. The difference from the embodiment shown in FIG10a is that:

[0116] 1. The shaped reflective surface 1204 is located near the A1 reflective surface 1202a1 side of the reflector 1202 light outlet. The A2 reflective surface 1202a2 side of the reflector light outlet is located near the centerline Bc of the lens. This ensures that as much of the light emitted from the reflector in the -B direction as possible enters the effective aperture of the lens. The shaped reflective surface 1204 forms a virtual reflector 1202' in the +B direction, extending the far-field light distribution in the -B direction and forming an illumination gradient in the -B direction, as shown in Figure 12b. The principle behind this is not further explained. The extended light spot formed in the far-field light distribution is indicated as 1261 in Figure 12b. The light spot directly formed by the light outlet of the reflector 1202 in the far-field light distribution is 1260.

[0117] 2. The light-emitting device also includes a third shaping reflective surface 1205 extending congruently along direction A. The first end of the third shaping reflective surface 1205 is adjacent to the A2 reflective surface 1202a2 of the light outlet of the reflective cup 1202, and the second end of the third shaping reflective surface extends toward the lens 1203. The third shaping reflective surface 1205 forms a virtual reflective cup 1202" in the -B direction, and causes the far-field light distribution to extend toward the +B direction and form an illumination gradient in the +B direction. The principle of this will not be repeated here. The extended light spot formed in the far-field light distribution is represented as 1262 in FIG. 12b. In this embodiment, the length of the third shaping reflective surface 1205 extending toward the lens is less than the length of the shaping reflective surface 1204 extending toward the lens. According to the aforementioned working principle of the shaping reflective surface, the shorter the length of the shaping reflective surface extending toward the lens, the shorter the extended length of the extended light spot formed in the far-field light distribution. Therefore, the shaping reflective surface 1205 extends toward the lens. The extended length of the far-field extended light spot 1261 formed by the reflective surface in direction B is greater than the extended length of the far-field extended light spot 1262 formed by the third shaping reflective surface in direction B. By adjusting the relative positions of one side of the reflective surface 1202a2 of the reflector's light outlet and the centerline Bc of the lens, the far-field light, including the extended light spot 1262, can be concentrated below the horizontal line. This not only avoids glare, but also ensures that the brightest point of illumination in the generated far-field light distribution is within the main light spot 1260, not directly adjacent to the horizontal line. This is particularly required in lighting for slow-moving vehicles (such as electric vehicles and bicycles).

[0118] The structural schematic diagram of another embodiment of the present invention is shown in Figures 13a and 13b. The difference from the embodiment shown in Figure 10a is that:

[0119] 1. As shown in FIG13a, in this embodiment, the width L of the lens 1303 in the B direction is B This significantly reduces the receiving angle of the lens in the B direction, and the angle of the light emitted from the reflective cup 1302 is much larger than that of L. B , In the embodiment shown in FIG11a, the reflective cup is designed to increase the So that In this embodiment, L is intentionally reduced B To make This embodiment reduces L BThe advantage is that the lens becomes thinner in the B direction. Since the width of the lens in the B direction is not much larger than the width of the light outlet of the reflective cup, an outwardly protruding shaped reflective surface is not used. In this embodiment, a planar first shaped reflective surface 1304 is still used. The first end of this first shaped reflective surface is close to the A1 reflective surface 1302a1 side of the light outlet of the reflective cup 1302, and the second end extends toward the lens 1303. The second end of this first shaped reflective surface 1304 is close to the edge of the lens 1303, ensuring that all light emitted in the +B direction is incident within the effective aperture of the lens. The virtual reflective cup 1302' formed by the shaped reflective surface 1204 doubles the far-field light distribution in the -B direction and forms an illumination gradient in the -B direction. The principle of this will not be repeated here.

[0120] 2. In this embodiment, the light-emitting device further includes a first transmissive scattering plate 1308 positioned between a side edge of the reflective surface 1302a1 at the light outlet of the reflector cup 1302 and the optical path of the lens 13003. Light incident on the first transmissive scattering plate 1308 (e.g., light 1323 in FIG. 13a ) is scattered as it passes through the plate 1308, forming transmissive scattered light 1324. The light outlet of the reflector cup 1302 forms a main light spot in the far field through the imaging projection effect of the lens. Simultaneously, the light outlet of the virtual reflector cup 1302′ also forms an extended light spot in the far field through the imaging projection effect of the lens. If there is a gap between the first shaped reflective surface 1304 and the light outlet of the reflector cup, there will also be a gap between the reflector cup 1302 and the virtual reflector cup 1302′. Consequently, a gap will exist between the main light spot and the extended light spot in the far field. This gap appears as a dark stripe-shaped dark area, significantly affecting the lighting effect. By introducing the first transmission diffuser 1308 between the edge of the reflective surface 1302a1 at the light outlet of the reflector 1302 and the optical path of the lens 1303, the gap between the reflector 1302 and the virtual reflector 1302' is blurred by the scattering effect of the first transmission diffuser, thereby improving the lighting effect without affecting efficiency. Referring to the enlarged schematic diagram of the first transmission diffuser and the reflector in Figure 13c, preferably, the central direction of light emitted by the reflector is direction C. In direction C, the first transmission diffuser 1308 covers the edge of the reflective surface 1302a1 at the light outlet of the reflector. This effectively blocks the gap between the reflector 1302 and the virtual reflector 1302', thereby achieving the effect of blurring the gap.

[0121] 3. The first shaping reflective surface 1304 is located near the side of the reflector cup's light outlet near the A1 reflective surface 1302a1. The side of the A2 reflective surface 1202a2 of the reflector cup's light outlet is located near the centerline Bc of the lens. This ensures that as much of the light emitted from the reflector cup in the -B direction as possible enters the effective aperture of the lens. Simultaneously, the far-field light distribution is primarily located below the horizontal line Bc, thus preventing glare. It can be seen that the edge of the A2 reflective surface 1302a2 of the reflector cup's light outlet serves as the cutoff line for the far-field light distribution in the +B direction of this embodiment. The clearer this cutoff line is, the better. Therefore, preferably, the first transmissive scattering sheet 1308 does not cover the edge of the A2 reflective surface 1302a2 of the reflector cup's light outlet in the C direction, thereby maintaining the clarity of the cutoff line. Preferably, a cutoff aperture extending along direction A is further included, located on one side of the reflective surface A2 at the edge of the light outlet. The edge of the cutoff aperture at least partially extends into the light outlet, allowing the edge of the cutoff aperture to be imaged in the far field by the lens. In this case, in direction C, the first transmission scattering sheet 1308 does not cover one side edge of the reflective surface A2 1302a2 of the light outlet of the reflector cup (i.e., does not cover the edge of the cutoff aperture), thereby maintaining the clarity of the cutoff line.

[0122] 4. Referring to FIG13c, in the C direction, the distance from the first transmission scattering sheet 1308 to the edge of the A1 reflective surface 1302a1 of the reflective cup light outlet is H, and the width of the first transmission scattering sheet 1308 in the B direction is b. s ,in, According to the description of the above embodiment, it can be known that after reasonable design, the reflective cup 1302 is used to compress the light emitted by the light source into a light emitting half angle. The outgoing light (in the B direction), so the half angle of the light emitted from the edge of the A1 reflecting surface 1302a1 of the reflective cup light outlet is also So This ensures that the first transmission scattering plate 1308 can cover at least more than half of the light emitted from the side edge of the A1 reflective surface 1302a1 of the reflective cup light outlet (because the other half will also be reflected after being incident on the first shaped reflective surface and incident on the first transmission scattering plate). This can effectively weaken the far-field dark stripes formed by the gap between the reflective cup 1302 and the virtual reflective cup 1302'.

[0123] 5. As shown in FIG13b , in this embodiment, the light-emitting device further includes a second shaping reflective surface 1305 extending congruently along direction B. The first end of the second shaping reflective surface 1305 is adjacent to the B1 reflective surface 1302b1 of the light outlet of the reflection channel 1302, and the second end extends toward the lens 1303. The light-emitting device further includes a third shaping reflective surface extending congruently along direction B. The first end of the third shaping reflective surface is adjacent to the B2 reflective surface 1302b2 of the light outlet of the reflection channel 1302, and the second end extends toward the lens 1303. Both the second shaping reflective surface 1305 and the third shaping reflective surface 1306 are curved surfaces that are convex away from the reflection channel 1302. The second shaping reflective surface 1305 can form a larger expanded light spot in the -A direction of the far-field light distribution, while the third shaping reflective surface 1306 can form a larger expanded light spot in the +A direction of the far-field light distribution. The principles behind this are not further elaborated. The light-emitting device also includes a second transmission scattering plate 1307 positioned between a side edge of the B1 reflective surface 1302b1 of the reflective cup's light outlet and the optical path of the lens. Light incident on the second transmission scattering plate 1307 (e.g., light 1321) is scattered as it passes through the second transmission scattering plate 1307, forming scattered light (e.g., light 1322). Similarly, the second transmission scattering plate 1307 is used to block the gap between the reflective channel's light outlet and the virtual light point region generated by the second shaping reflective surface. Furthermore, to further reduce the dark streaks generated by this gap in the far field, the central direction of the reflective cup's light emission is in the C direction, and the second transmission scattering plate 1307 covers a side edge of the B1 reflective surface of the reflective channel's light outlet in the C direction. To avoid affecting the clarity of the far-field cutoff line, the second transmission scattering plate 1307 preferably does not cover a side edge of the A2 reflective surface of the reflective channel's light outlet (as shown by the second transmission scattering plate 1307 in FIG. 13a ).

[0124] Obviously, the transmissive scattering sheet in this embodiment (including the first transmissive scattering sheet and the second transmissive scattering sheet) can also be applied to other embodiments of the present invention.

[0125] A schematic diagram of a reflector and a shaped reflective surface in another embodiment of the present invention is shown in FIG14 . Other components are identical to those in the embodiment shown in FIG11 a and are therefore not shown in FIG14 . Unlike the embodiment shown in FIG11 a , in this embodiment, the reflector 1402 includes a central axis 1402 c, which is a line connecting the center of the light exit and the center of the light entrance. The shaped reflective surface 1404 includes a position Z. The distance from position Z to the central axis 1402 c of the reflector is greater than the distance from the first end 1404 a of the shaped reflective surface 1404 to the central axis 1404 c of the reflector. The distance from position Z to the central axis 1404 c of the reflector is also greater than the distance from the second end 1404 b of the shaped reflective surface 1404 to the central axis 1404 c of the reflector. In other words, as the shaped reflective surface extends toward the lens, it first deflects away from the reflector and then toward the reflector. This results in a shaped reflective surface that is also convex away from the reflector, but the effect is not exactly the same as that of the embodiment shown in FIG11a. As shown in FIG14 , four light rays 1221, 1222, 1223, and 1224 are used as examples to represent light rays emitted from the light outlet of the reflector 1402 and incident on different positions of the shaped reflective surface. Point Z represents the point on the shaped reflective surface that is farthest from the central axis 1402c of the reflector during its extension. It can be seen that the virtual light spots 1421s and 1422 formed by the light rays 1421 and 1422 incident on the shaped reflective surface between the first end and point Z are relatively close to the solid reflective cup 1402. However, the incident angles of the light rays 1423 and 1424 incident on the shaped reflective surface between point Z and the second end are increased because the shaped reflective surface is curved toward the reflective cup. As a result, the virtual light spots 1423s and 1424s formed are much farther away from the solid reflective cup 1402. As a result, the area of ​​the virtual light spots formed by the entire shaped reflective surface 1404 is significantly increased, thereby significantly increasing the area of ​​the extended light spot in the far-field light distribution. However, this increase does not affect the main light spot formed by the light outlet of the solid reflective cup in the far-field light distribution, and therefore does not affect the maximum brightness of the illuminated area. At the same time, it also increases the illuminated area in the near distance. With reference to FIG. 14 , it can be seen that there is not only one position Z that satisfies the following conditions: the distance from position Z to the central axis 1402c of the reflector cup is greater than the distance from the first end 1404a of the shaped reflective surface 1404 to the central axis 1404c of the reflector cup, and the distance from position Z to the central axis 1404c of the reflector cup is greater than the distance from the second end 1404b of the shaped reflective surface 1404 to the central axis 1404c of the reflector cup. However, as long as such a position Z exists, the beneficial effects of this embodiment will inevitably be achieved.Compared with the present embodiment, in the embodiment shown in FIG11 a , the shaped reflecting surface 1104 always moves away from the reflective cup while extending toward the lens, so that the increase in the incident angle in the present embodiment does not occur. Therefore, the expanded light spot formed in the far-field light distribution is not as large as that in the present embodiment.

[0126] In the above embodiments of the present invention, the reflective cup and the shaped reflective surface are used to change the distribution of light. As described above, the reflective cup is used to compress the angle of light emitted by the light source, so that the light outlet of the reflective cup can be regarded as a new luminous half angle of Small-angle light source; in this case, the light outlet of the reflective cup is basically evenly distributed, and a corresponding evenly distributed light spot will be formed in the far field. In applications such as car lights, there will be problems such as the lighting area being too concentrated and too small, and too bright near, so it is an important issue to form an expanded uneven light spot while maintaining a relatively high maximum light intensity. The present invention utilizes the effect of the shaped reflective surface to separate a portion of the energy from the main light spot to form an extended light spot, thereby solving this problem. The different forms of shaped reflective surfaces listed in different embodiments of the present invention can form different styles of extended light spots, but their essence is to use the extended light spot to achieve the expansion of the lighting area and a smaller loss of maximum light intensity.

[0127] The embodiment shown in Figure 11a illustrates the function of the cutoff aperture 1107, and Figures 11b and 11d illustrate two possible cutoff aperture shapes. In another embodiment of the present invention, as shown in Figure 15a , the edge of the cutoff aperture 1507 includes a first straight edge 1507a and a second straight edge 1507b that is parallel to and offset from the first straight edge 1507a. The first straight edge 1507a extends deeper into the light outlet than the second straight edge 1507b. The first and second straight edges are connected at their intersection by a short edge 1507c, which forms an angle between the first and second straight edges of less than 55 degrees and greater than 35 degrees. Unlike the cutoff aperture shown in Figure 11b , the cutoff aperture also includes a light attenuator 1507T. In this embodiment, the light attenuator 1507T extends from the first straight edge 1507a into the light outlet of the reflector cup 1502, as shown in Figure 15c . In this embodiment, light attenuator 1507T is made of opaque material and is integrally molded with cutoff aperture 1507. Obviously, the light attenuator blocks a portion of the light emitted from the reflector's light outlet, creating a shadow region 1562T of light attenuator 1507T in the far-field light distribution, as shown in Figure 15b. This shadow region 1562T complies with regulations on vehicle lighting, which designate this region as "75L," "50L," or "70L." This dark region is required to prevent light from reflecting off the ground and glaring on oncoming drivers.

[0128] Preferably, in this embodiment, the width of the light attenuating element 1507T at the edge 1507T1 near the light outlet is smaller than the width 1507T2 of the light attenuating element 1507 extending into the light outlet. This has the advantage of utilizing the width of 1507T2 to form a sufficiently large shadow dark area. Since 1507T1 serves to connect to 1507T2, the smaller it is, the better. The smaller 1507T1 is, the less damage it causes to the cutoff line. When the width of 1507T1 is sufficiently small, the cutoff line remains intact without a gap, while still forming a sufficiently large shadow dark area 1562T.

[0129] Although vehicle lighting regulations require that the illumination in area 1562T be kept below a certain level to prevent glare, in practice, it's still preferable to have some light there. A complete absence of light will also affect the lighting effect (although it meets regulatory requirements). Therefore, in this embodiment, as shown in FIG15c , the light attenuator 1507T preferably tilts relative to the first straight edge 1507a, away from the light outlet of the reflector cup 1502. This advantageously blocks most of the light directly in the area facing it, while a small amount of light still exits from its edges and is collected by the lens. Therefore, the brightness of the shadowed dark area 1562T is attenuated, but not completely deprived of light.

[0130] On the other hand, in principle, making the light attenuator 1507T itself an opaque material is an easy method to implement, but it also has the disadvantage of having zero transmittance, resulting in a completely unilluminated dark area. In practical applications, the light attenuator can also use refraction and / or scattering to change the direction of the light incident on it, thereby achieving the purpose of attenuating local light. For example, the light attenuator can be a prism. Although the prism itself is transparent, the light from the corresponding area will be deflected after entering the prism, resulting in the formation of an attenuated dark area in the corresponding area. However, because the prism itself is transparent, the illumination of this dark area will not be zero. Of course, the light attenuator can also be a scattering sheet or a curved lens, which can also achieve the purpose of locally reducing illumination.

[0131] Another embodiment of the present invention shows a cutoff aperture 1607, as shown in FIG16a . The cutoff aperture 1607 includes a first straight edge 1607a and a hypotenuse 1607b intersecting the first straight edge. The angle between the hypotenuse 1607b and the first straight edge 1607a is greater than 65 degrees and less than 85 degrees, and the first straight edge 1607a extends deeper into the light outlet relative to the hypotenuse 1607b. The cutoff aperture also includes a light attenuator 1607T extending from the first straight edge 1607a toward the interior of the light outlet of the reflector cup. The resulting far-field light distribution is shown in FIG16b , where the light attenuator forms a shadow dark region 1662T. This embodiment differs from the embodiment shown in FIG15a only in the shape of the cutoff aperture. However, the operating principle of the light attenuator 1607T is identical, and therefore its operating principle and beneficial effects are not further described.

[0132] In the two embodiments shown in Figures 15a and 16a, the light attenuator is accompanied by a cutoff aperture. However, in practice, since the edge of the reflector's light outlet can be straight (or can have other shapes), even without a cutoff aperture, the reflector's light outlet edge can still form a clear light-dark boundary in the far field, so a cutoff aperture is not necessary. Even without a cutoff aperture, as long as a light attenuator is included between the reflector's light outlet and the lens's optical path, extending from the reflective surface A1 of the light outlet edge into the interior of the light outlet, partial shielding can be achieved, thereby forming a dark area shadow in the far-field light distribution, thereby achieving the desired light distribution that complies with regulations.

[0133] Automotive regulations require a certain amount of dim light at a specific location above the cutoff line. This dim light cannot exceed a certain illuminance value, otherwise it will cause glare. At the same time, this dim light cannot be absent, as it is used to illuminate road signs high in the driver's field of view. To achieve this requirement, a schematic diagram of another embodiment of the present invention is shown in Figure 17a. Unlike the embodiment shown in Figure 10a, in this embodiment, the light-emitting device also includes a cutoff aperture 1707 extending along the A direction and located on the side of the reflective surface 1702a2 at the edge of the light outlet of the reflector cup 1702. The edge of the cutoff aperture 1707 includes a first straight edge that extends into the interior of the light outlet of the reflector cup 1702. As previously described, the cutoff aperture 1707 is used to achieve the cutoff line in the far-field light distribution, as shown in the schematic diagram of the far-field light distribution in Figure 17b. The light-emitting device also includes a micro-light element 1708 positioned between the light outlet of the reflector 1702 and the optical path of the lens 1703. A portion of the light emitted from the light outlet of the reflector is incident on the micro-light element 1708. A portion of the light is reflected by the micro-light element 1708 and incident on the lens 1703, where it is projected out. In this embodiment, in direction B, the micro-light element 1708 is located on the side of the first straight edge of the cut-off aperture 1707, away from the light outlet. The operating principle of this micro-light element is discussed below.

[0134] Taking the light 1721 emitted from the reflective cup 1702 and directed toward the micro-light element 1708 as an example, after the light 1721 is incident on the micro-light element 1708, a small portion of the light 1723 is reflected by the micro-light element 1708 and is incident on the lens 1703 and projected out by the lens. The remaining majority of the light forms the transmitted light 1722 and still follows the original light path to be incident on the lens 1703 and projected out. By inferring the direction of light 1723, it can be found that since the micro-light element 1708 is located on the side of the first straight edge of the cut-off aperture 1707 away from the light outlet, light 1723 is equivalently emitted from a virtual light point 1723s located on the side of the first straight edge of the cut-off aperture away from the light outlet. This is equivalent to introducing a number of virtual light points in the -B direction of Figure 17a. In this way, in the far-field light distribution (as shown in Figure 17b), an extended light spot 1764 is added in the +B direction to the original light spot 1762. This extended light spot is located above the cut-off line (because virtual light point 1723s is located on the outside of the first straight edge of the cut-off aperture away from the light outlet of the reflector), thereby achieving the aforementioned function of illuminating the road sign. Since light 1723 is separated from light 1721 by reflection by the micro-light element 1708, the proportion of the brightness of light 1723 can be controlled, so that the brightness of the extended light spot 1764 can be controlled so that it is neither too bright nor too dim. Preferably, micro-light element 1708 is a transparent material, such as clear glass. Light incident on the transparent material is mostly transmitted through it, while a small portion is reflected from the surface of the transparent material due to the different refractive indices between air and the transparent material. For example, for transparent glass with a refractive index of 1.5, the transmittance of light incident on the air-glass interface is approximately 96%. This means that 4% of the light is reflected as light 1723, while 96% of the light remains along the original optical path. As can be seen, since the illuminance of extended spot 1764 is required to be very low, deducting 4% of the energy from the main spot is sufficient. This does not significantly affect the illuminance of the main spot and still meets the regulatory requirements for upward-lit road signs. If 4% energy isn't enough, it's obvious that glass with a higher refractive index could be used to increase reflectivity, or the micro-light element could be implemented using other methods. For example, micro-light element 1708 could be a transparent cylinder extending along direction A. A small portion of the light incident on the cylinder is reflected from its surface. By utilizing this partial total internal reflection within the cylinder, the energy proportion of reflected light 1723 can be increased. Of course, micro-light elements can also be made of surface-coated glass. By designing the coating layer, any desired reflectivity ratio can be achieved. This is prior art and will not be discussed further here. Of these various micro-light element implementation methods, transparent sheet material is the simplest and easiest to implement, but its disadvantage is that reflectivity is difficult to control. Since the extended spot 1764 requires very low brightness, a 4% energy proportion may still be too high.In this case, it is preferable to create microscopic undulations on the surface of the micro-optical element, so that light is scattered as it reflects off the surface. This scattering attenuates the illumination of the far-field extended light spot 1764 corresponding to the reflected light 1723. By controlling the degree of microscopic undulations on the surface of the micro-optical element, the degree of scattering, and thus the illumination of the far-field extended light spot 1764, can be controlled.

[0135] In the embodiment depicted in FIG17a , a cutoff aperture is used to implement the cutoff in the far-field light distribution. In practice, since the edge of the reflector cup 1702's light outlet near the A2 reflective surface 1702a2 can also form a straight light-dark boundary (of course, it can also be designed with a shape), this light-dark boundary can also function as a cutoff, making the cutoff aperture unnecessary. The embodiment depicted in FIG18 differs from the embodiment depicted in FIG17a in that a cutoff aperture is not included, and the micro-light element 1808 is located near the A2 reflective surface 1802a2 of the center 1802c of the reflector cup 1802's light outlet in the B direction. A shaped reflective surface 1804, extending congruently along the A direction, is located between the reflector cup and the lens optical path. The shaped reflective surface has a first end proximal to the A1 reflective surface 1802a1 of the reflector cup 1802's light outlet, and a second end extending toward the lens. That is, the micro-light element is located on the side of the reflector's light outlet center 1802c, away from the shaped reflective surface. Light 1821 incident on the micro-light element primarily transmits through micro-light element 1808, forming light 1822, with a small portion of its energy reflected to form light 1823. Because the micro-light element is located on the side of the reflector's light outlet center 1802c, away from the shaped reflective surface, the virtual light point 1823s corresponding to the reflected light 1823 also falls outside the reflector's light outlet and on the opposite side of the virtual reflector 1802' corresponding to the shaped reflective surface. Consequently, the extended light spots formed in the far field by these elements are also on opposite sides of the main light spot formed by the reflector's light outlet. Specifically, the extended light spot formed by the virtual reflector 1802' expands downward to form a larger illumination range, while the extended light spot formed by the virtual light point (e.g., 1823s) formed by the micro-light element expands upward to form a faint light that illuminates the road sign. In order to improve efficiency, preferably, as shown in Figure 19 of another embodiment, in direction B, the micro-light element 1908 is located on the side of the A2 reflective surface 1902a2 of the reflective cup 1902 away from the light outlet. At this time, the micro-light element 1908 does not block the front of the light outlet of the reflective cup, and has a relatively small impact on the main light spot of the far-field light distribution.

[0136] Another embodiment of the present invention is shown in two directions in Figures 20a and 20b. The difference from the embodiment shown in Figures 10a and 10b is that the light-emitting device of this embodiment further includes a refractive element 2008 located at the rear end of the optical path of the light outlet and extending congruently along the direction B. When light emitted along the optical axis of the reflective cup 2002 (such as light 2021) is incident on and refracted by the refractive element 2008, the direction of the emitted light (such as light 2022) is altered in the direction A relative to its incident direction (i.e., the direction of light 2021).

[0137] As previously explained, in the description of the present invention, A and B are merely aliases for two relatively orthogonal directions and are interchangeable in practical applications. Here, we will again describe this embodiment from the perspective of Figure 20b. Specifically, the reflective cup 2002 of this embodiment extends congruently along the B direction. The reflective cup 2002 includes a light inlet and a light outlet, and two opposing reflective surfaces B1 2002b1 and B2 2002b2 are located between the light inlet and the light outlet. Direction A is orthogonal to direction B, and the width of the light outlet in direction A is a. out , the width of the light entrance in direction A is a in , the distance from the light entrance to the light exit is h, where a out >a in , and a in +a out <2h. The light emitted by the light source enters the reflector cup 2002 through the light inlet. A portion of the light passes through the reflector cup 2002 and exits directly from the light outlet. The remaining light is incident on the reflective surface B1 2002b1 or the reflective surface B2 2002b2 of the reflector cup and is reflected therefrom before exiting from the light outlet. As can be seen from the previous description, the reflective cup 2002, which extends congruently along the B direction, restricts the light emission direction of the light source in the A direction. With proper design, the light emission angle formed at the light outlet of the reflector cup 2002 can be The outgoing light, It also includes a lens 2003, which is an imaging lens for projecting and imaging the light distribution on its focal plane into the far field. The light emitted from the light outlet of the reflective cup 2002 is incident on the lens 2003 and projected into the far field to form a far-field light distribution. Preferably, the transversals of the B1 reflecting surface 2002b1 and the B2 reflecting surface 2002b2 on the cross section perpendicular to the direction B are transversal B1 and transversal B2, respectively; transversal B1 is at least partially a parabola, the focus of the parabola coincides with the endpoint of transversal B2 at the light entrance, and the portion of the axis of the parabola passing through the focus on the side of the reflector 2002 is inclined in a direction away from transversal B1 relative to the line connecting the centers of the light entrance and the light exit; alternatively, transversal B1 2002b1 is at least partially a parabola, and transversal B2 2002b2 is a straight line; the endpoint of transversal B1 at the light entrance is point M, the symmetric point of point M with respect to transversal B2 is point N, the focus of the parabola of transversal B1 coincides with point N, the portion of the axis of the parabola passing through the focus on the side of the reflector is inclined relative to the light entrance. The line connecting the B2 section 2002b1 and the center of the light exit is inclined in the direction away from the B1 section; and / or, the B2 section 2002b2 is at least partially a parabola, the focus of the parabola coincides with the endpoint of the B1 section 2002b1 at the light entrance, and the portion of the axis of the parabola passing through the focus on the reflector side is inclined in the direction away from the B2 section relative to the line connecting the centers of the light entrance and the light exit; or, the B2 section 2002b2 is at least partially a parabola, and the B1 section 2002b1 is a straight line; the endpoint of the B2 section at the light entrance is point P, the symmetric point of point P with respect to the B1 section is point Q, the focus of the parabola of the B2 section coincides with point Q, and the portion of the axis of the parabola passing through the focus on the reflector side is inclined in the direction away from the B2 section relative to the line connecting the centers of the light entrance and the light exit.

[0138] Preferably, the optical system further includes a shaped reflective surface 2005 extending congruently along the B direction between the reflector 2002 and the lens 2003. The first end of the shaped reflective surface 2005 is located proximate to the B1 reflective surface 2002b1 of the light outlet of the reflector 2002, and the second end extends toward the lens 2003. The shaped reflective surface is used to form a virtual reflective cup 2002'. Light reflected from the shaped reflective surface is equivalent to light emitted from the virtual reflective cup 2002', forming an expanded light spot in the -A direction of the far-field light distribution, thereby significantly expanding the illuminated area. Similarly, preferably, the optical system further includes a second shaped reflective surface 2006 extending congruently along the B direction between the reflector 2002 and the lens 2003. The first end of the second shaped reflective surface 2006 is located proximate to the B2 reflective surface 2002b2 of the light outlet of the reflector 2002, and the second end extends toward the lens 2003. The second shaping reflective surface 2006 is used to form a virtual reflective cup 2002", and the light reflected from the second shaping reflective surface 2006 is equivalent to the light emitted from the virtual reflective cup 2002", which can form an extended light spot in the +A direction in the far-field light distribution, thereby significantly expanding the illumination area.

[0139] Although the shaping reflective surface 2005 and the second shaping reflective surface 2006 are used to expand the illumination area in the -A and +A directions respectively (corresponding to horizontal expansion in practical applications), this may still be insufficient in practical applications. The present invention uses a refractive element 2008 to solve this problem.

[0140] In this embodiment, the refractive element 2008 is preferably a prism 2008. The prism 2008 includes an active surface 2008a that is non-perpendicular to the optical axis of the reflective cup 2002 in direction A. Thus, after a light ray 2021 emitted along the optical axis of the reflective cup 2002 is incident on the prism 2008 and refracted by the prism 2008, due to the principle of refraction, the direction of the outgoing light ray 2022 is deflected in direction A relative to its incident direction (i.e., the direction of the light ray 2021). Now let's look at other light rays. Specifically, for the light ray 2023 emitted from the virtual reflective cup 2002', after passing through the lens 2003, it is projected in the -A direction. However, after passing through the prism 2008, its outgoing light ray 2024 is deflected in the +A direction relative to the light ray 2023. Light 2025 emitted from virtual reflector 2002" is projected toward the +A direction after passing through lens 2003. However, after passing through prism 2008, its outgoing light 2026 is deflected toward the +A direction relative to light 2025, meaning it is emitted at a greater angle in the +A direction. In summary, the light distribution originally emitted from reflector 2002, virtual reflectors 2002', and 2002" is deflected toward the +A direction by refractive element 2008. This shifts the far-field light spot toward the +A direction, creating a wider angle of illumination coverage in the +A direction, forming far-field light spot 2061. Light spot 2061 in the figure only represents its position and width in the A direction and does not indicate the illumination gradient or brightness in the B direction. It is easy to understand that rotating prism 2008 180 degrees in the A direction would naturally deflect the far-field light distribution toward the -A direction, thereby creating a wider angle of illumination coverage in the -A direction.

[0141] A schematic structural diagram of another embodiment of the present invention is shown in FIG21 . The differences from the embodiment shown in FIG20 b include:

[0142] 1. In this embodiment, the refractive element 2108 includes two or more parallel and side-by-side refractive units (two of which are shown in FIG. 2108a). This is equivalent to splitting a large prism in FIG. 20b into multiple small prism units in this embodiment, while the angle of the active surface of each prism unit remains unchanged. Therefore, the light incident on each prism unit can still be deflected to the same degree. The advantage of the multiple refractive units in this embodiment is that the thickness of the refractive element 2108 is reduced, thereby reducing the size of the device. For each small prism unit extending congruently along the B direction, the following can also be achieved: after the light 2121 emitted along the optical axis of the reflective cup 2102 is incident and refracted, the direction of the outgoing light 2122 changes in the A direction relative to its incident direction.

[0143] 2. In this embodiment, the refractive element 2108 is located on the side of the lens 2103 away from the reflector cup and is integrally formed with the lens 2103. This has the advantage of reducing costs. Of course, the refractive element can also be located at the front end of the optical path of the lens, which obviously also achieves the beneficial effect of deflecting the optical path.

[0144] 3. In this embodiment, the shaping reflective surface 2105 and the second shaping element 2106 are curved surfaces that bulge away from the reflective cup. This has the advantage of magnifying the virtual image (e.g., virtual light point 2123s) by the convex reflecting surface, thereby achieving a larger expanded light spot. This, after deflection by the refractive element 2108, results in a wider illumination range 2161 at a wide angle.

[0145] In both the embodiments shown in Figures 20b and 21, far-field spot shifting in the +A direction is achieved. Of course, spot shifting in the -A direction can also be achieved, but simultaneous shifting in both directions is not possible. This problem is addressed in another embodiment of the present invention. As shown in Figure 22, this embodiment differs from the embodiment shown in Figure 21 in that the refractive element 2208 in this embodiment includes a positive refractive region 2208a and a negative refractive region 2208b. Light emitted along the optical axis of the reflective cup 2202 is incident on and refracted by the positive refractive region 2208a, with the exit direction deflected toward the +A direction relative to its incident direction. Light emitted along the optical axis of the reflective cup is incident on and refracted by the negative refractive region 2208b, with the exit direction deflected toward the -A direction relative to its incident direction.

[0146] In this embodiment, each small prism unit includes two active surfaces (i.e., a positive refractive area 2208a and a negative refractive area 2208b). The two active surfaces have different angles, resulting in different deflection directions for the incident light. Through reasonable configuration, it is possible to deflect part of the light toward the +A direction and part of the light toward the -A direction. This can be understood as the far-field light distribution formed by the reflective cup and the virtual light point, under the action of the refractive element, with half of the energy deflected in the opposite direction of +A to form far-field light spot 2261, and half of the energy deflected in the -A direction to form far-field light spot 2262. This can simultaneously expand the illumination area in both the +A and -A directions.

[0147] In the above three embodiments, the refractive element is implemented based on the principle of a prism, but it can also be implemented using a cylindrical mirror. In another embodiment, as shown in Figure 23, the refractive element 2308 includes multiple refractive units 2308c, each of which is a cylindrical mirror extending congruently along the B direction. According to the principle of cylindrical mirrors, the angle of the incident light will be deflected in the A direction, thus achieving the purpose of the present invention. The difference between the cylindrical mirror in this embodiment and the prism is that the deflection angle of light incident on different positions of the cylindrical mirror is different. This will change the original light distribution while deflecting, which is also optional in practical applications. Of course, there are other optical elements that can deflect light in the A direction, which are not listed here.

[0148] In the aforementioned embodiments, a group of light sources and a lens form a light-emitting group, creating various light spot distributions to meet practical needs. However, the light spots formed in this way are ultimately limited by insufficient design freedom, and the resulting light distribution is sometimes insufficient to meet more complex practical needs. Therefore, in actual applications, multiple light-emitting groups are used, and the positions and emission angles of these multiple light-emitting groups are adjusted so that the light distributions in the far field overlap and complement each other, forming a more complex light distribution that meets practical needs. The following describes in detail the methods and effects of combining multiple light-emitting groups through several embodiments.

[0149] The present invention also provides a vehicle lamp. FIG24a shows a front view of an embodiment of the vehicle lamp, which includes a first light-emitting group 2490 and a second light-emitting group 2491, wherein a top view of the second light-emitting group 2491 is shown in FIG24b. The first light-emitting group 2490 includes a first light source 2401, a first reflective cup 2402, and a first lens 2403. The first reflective cup 2402 extends congruently along the A direction. The first reflective cup includes a light inlet and a light outlet relative to each other. The light inlet and the light outlet include two relative A11 reflective surfaces 2402a1 and A12 reflective surfaces 2402a2. The B direction is orthogonal to the A direction. The width of the light outlet of the first reflective cup in the B direction is b. 1-outThe width of the first reflector cup light entrance in direction B is b 1-in , the distance from the light entrance to the light exit is h1, where b 1-out >b 1-in , and b 1-in +b 1-out <2h1. Light emitted by the first light source 2401 enters the first reflector 2402 through the light inlet of the first reflector 2402. A portion of the light passes through the first reflector and exits directly through the light outlet. The remaining light is incident on the A11 reflective surface 2402a1 or the A12 reflective surface 2402a2 of the first reflector and is reflected therefrom before exiting through the light outlet. The first lens 2403 is an imaging lens, used to project and image the light distribution from its focal plane into the far field. Light exiting the light outlet of the first reflector 2402 enters and is projected into the far field by the first lens 2403. The first light-emitting group also includes a first shaping reflective surface 2404, located between the optical paths of the first reflector 2402 and the first lens 2403, extending congruently along direction A. The first end of the first shaping reflective surface is adjacent to the light outlet of the first reflector 2402, and the second end extends toward the first lens 2403.

[0150] The second light emitting group includes a second light source 2411, a second reflective cup 2412, and a second lens 2413. Referring to FIG24b, the second reflective cup 2412 extends congruently along the B direction. The second reflective cup includes a light inlet and a light outlet opposite to each other. The light inlet and the light outlet include two opposite reflective surfaces B21 2412b1 and B22 2412b2. The width of the light outlet of the second reflective cup 2412 in the A direction is a. 2-out The width of the second reflector cup light entrance in direction A is a 2-in , the distance from the light entrance to the light exit is h2, where a 2-out >a 2-in , and a 2-in +a 2-out <2h2. Light emitted by the second light source 2411 enters the second reflector cup 2412 through its light inlet. A portion of the light passes through the second reflector cup and exits directly through the light outlet. The remaining light is incident on and reflected by the B21 reflective surface 2412b1 or the B22 reflective surface 2412b2 of the second reflector cup before exiting through the light outlet. The second lens 2413 is an imaging lens, used to project and image the light distribution from its focal plane into the far field. Light emitted from the light outlet of the second reflector cup 2412 enters and is projected into the far field by the second lens 2413. The second light-emitting group also includes a refractive element 2418 extending congruently along the B direction, located at the rear end of the optical path of the light outlet of the second reflector cup 2412. Light emitted along the optical axis of the second reflector cup 2412 enters and is refracted by the refractive element 2418, causing the exit direction to change in the A direction relative to its incident direction.

[0151] In this embodiment, the width of the first lens 2403 of the first light-emitting group and the second lens 2413 of the second light-emitting group in the A direction is smaller than the width in the B direction, and the first lens 2403 and the second lens 2413 are connected in the B direction and overlap in the A direction (that is, the coordinates in the A direction are the same), thus forming a novel appearance of a vehicle lamp with a vertical strip outlet.

[0152] In this embodiment, referring to Figure 24a, the second light-emitting group preferably further includes an A21 reflective surface 2412a1 and an A22 reflective surface 2412a2 extending congruently along direction A. The A21 reflective surface 2412a1, the B21 reflective surface 2412b1, the A22 reflective surface 2412a2, and the B22 reflective surface 2412b2 are connected to form a second reflective channel 2412. Light emitted by the second light source enters the light inlet of the second reflective channel 2412, propagates through the second reflective channel, and exits the light outlet of the second reflective channel. Light exiting the light outlet of the second reflective channel 2412 enters the second lens 2413 and is projected into the far field. In this embodiment, both the second reflector and the reflective channel are denoted by the number 2412, which is self-explanatory. The advantage of using the A21 reflective surface 2412a1 and the A22 reflective surface 2412a2 is that the angle of light emitted by the second light source 2411 can also be limited in direction B.

[0153] In this embodiment, referring to FIG. 24b , the optical system preferably further includes second shaping reflective surfaces 2415 and 2416 extending congruently along direction B between the second reflective cup 2412 and the optical path of the second lens 2413 (of course, using only one second shaping reflective surface is also acceptable). The first ends of the second shaping reflective surfaces 2415 and 2416 are located near the light outlet of the second reflective cup 2412, and the second ends extend toward the second lens 2412. As described in the previous embodiment, this can form an expanded light spot in direction A, thereby expanding the illumination range in direction A. More preferably, the second shaping reflective surfaces 2415 and 2416 extend into the optical path of the first light-emitting group in direction B, thereby simultaneously forming an expanded light spot in direction A for both the first and second light-emitting groups.

[0154] First, let's look at the first light-emitting group. Its operating principle is the same as that of the embodiment shown in FIG10a. Its far-field light distribution is shown as spot 2461 in FIG24c, and the illuminated area is located below horizontal line Bc (in the -B direction). Its operating principle is not further described. The operating principle of the second light-emitting group is the same as that of the embodiment shown in FIG22. Its far-field light distribution is shown as spots 2462 and 2463 in FIG24c. Preferably, in this embodiment, the refractive element 2418 includes a positive refractive region and a negative refractive region. Light emitted along the optical axis of the second reflective cup 2412 is incident on and refracted by the positive refractive region, with the exit direction deflected toward the +A direction relative to its incident direction, forming spot 2463. Light emitted along the optical axis of the second reflective cup is incident on and refracted by the negative refractive region, with the exit direction deflected toward the -A direction relative to its incident direction, forming spot 2462. Based on the aforementioned embodiment, it can be understood that the first shaped reflective surface 2404 causes light spot 2461 to form a continuously varying illuminance gradient in the -B direction, while the presence of the second shaped reflective surfaces 2415 and 2416 causes light spot 2461 to form continuously varying illuminance gradients in both the +A and -A directions. This also causes light spot 2462 to form an illuminance gradient in the -A direction, and light spot 2463 to form an illuminance gradient in the +A direction. The far-field light distribution 2461 emitted by the first light-emitting group has a relatively large illumination range in the B direction (i.e., the vertical direction of the vehicle lamp), but its illumination range in the A direction (i.e., the horizontal direction of the vehicle lamp) is insufficient. Therefore, the far-field light distributions 2462 and 2463 emitted by the second light-emitting group compensate for this deficiency, significantly expanding the illumination range in the horizontal direction. As shown in FIG24c , the combination of the light spot 2461 of the first light-emitting group and the light spots 2462 and 2463 of the second light-emitting group together constitute the far-field light distribution of this embodiment, which is very suitable for low-beam lighting of automotive lamps: it has both vertical lighting and a large range of horizontal lighting.

[0155] In the automotive lamp of this embodiment, in the far-field light distribution shown in FIG24c , horizontal line Bc is the light-dark boundary of the entire light distribution. This light-dark boundary, also known as the cutoff line, minimizes the amount of light above horizontal line Bc, thereby preventing it from irradiating the eyes of oncoming drivers and causing glare. In this embodiment, preferably, the first end of the first shaped reflective surface 2404 is located near the +B side of the light outlet of the first reflective cup 2402. The first light-emitting group forms a first light spot 2461 in the far field. This first light spot has a light-dark boundary Bc. The energy of the light on the -B side of the light-dark boundary Bc in the first light spot accounts for no less than 80% of the total energy of the first light spot 2461, meaning that the vast majority of the energy lies below the light-dark boundary, thereby preventing glare. The second light-emitting group forms second light spots 2462 and 2463 in the far field. The energy of the light on the -B side of the light-dark boundary Bc in the second light spots 2462 and 2463 accounts for no less than 80% of the total energy of the second light spots. In other words, the vast majority of the energy of the second light spots 2462 and 2463 lies below the light-dark boundary to prevent glare. Of course, the present invention is not limited to other combinations of far-field light spots emitted by the first and second light-emitting groups.

[0156] In this embodiment, the first and second light-emitting groups are connected in the B direction, meaning they are wider in the B direction and narrower in the A direction, forming a vertical strip-shaped light outlet. This is obviously not a requirement and can be adjusted based on the actual design requirements. In another embodiment shown in Figures 25a and 25b, the first light-emitting group 2590 and the two second light-emitting groups 2591 and 2592 are all arranged along the A direction and overlap in the B direction. Because the first lens 2503 and the two second lenses 2513 and 2523 are all narrower in the A direction, the light outlet in this embodiment has a nearly square shape. As shown in Figure 25c, the light emitted by the first light-emitting group 2590 still forms a central spot 2561 in the far-field light distribution. However, unlike the embodiment shown in Figure 24a, this embodiment includes two second light-emitting groups 2591 and 2592, with the light-emitting group 2591 including a refractive element 2518. The operating principle of this refractive element is the same as that of the embodiment shown in Figure 21 and will not be further described here. Under the action of refractive element 2518, the light emitted by second light-emitting group 2591 is deflected toward the +A direction, forming light spot 2562 (as shown in FIG25c ). Similarly, second light-emitting group 2592 includes refractive element 2528, and the light emitted by second light-emitting group 2592 is deflected toward the -A direction, forming light spot 2563 (as shown in FIG25c ). These laterally widened light spots 2562 and 2563 can be independently switched on and dimmed by controlling light source 2511 and light source 2521, respectively. This has specific practical applications. For example, for car lights, when turning left, light source 2521 can be activated to form an expanded light spot 2563 on the left side, while when turning right, light source 2511 can be activated to form an expanded light spot 2562 on the right side, thereby expanding the illuminated area during the turn and achieving intelligent control. For personal vehicles such as bicycles, electric vehicles, and scooters, sensors can detect turns and activate the expanded light spot on the corresponding side. Specifically, the vehicle lamp further includes a driver module and a sensor control module. The driver module is configured to independently power the first light source 2501 of the first light-emitting group 2590 and the second light sources 2511 and 2521 of the second light-emitting groups 2591 and 2592, respectively. The sensor control module is configured to detect the real-time orientation of the lamp to determine whether it is turning left or right. For example, the sensor control module includes an acceleration sensor. When the personal vehicle turns left, it experiences leftward acceleration; when the personal vehicle turns right, it experiences rightward acceleration; and when the vehicle is traveling straight, there is virtually no leftward or rightward acceleration. Therefore, the acceleration sensor can be used to detect whether the lamp is turning left, turning right, or traveling straight.When the vehicle lamp is in the on state, the driving module drives the first light-emitting group 2590 to light up to form illumination, and the central light spot 2561 forms an illumination area; when the sensor control module detects a right turn, the sensor control module controls the driving module to drive the second light-emitting group 2591 to light up to form an extended light spot 2562; when the sensor control module detects a left turn, the sensor control module controls the driving module to drive the second light-emitting group 2592 to light up to form an extended light spot 2563.

[0157] The structure of another embodiment of a vehicle lamp of the present invention is shown in FIG26a, and a schematic diagram of its far-field light distribution is shown in FIG26b. Unlike the embodiment shown in FIG24a, the vehicle lamp of this embodiment further includes a third light-emitting group, which includes a third light source 2631, a third reflector cup 2632, and a third lens 2633. The third reflector cup 2632 extends congruently along the A direction, and includes a light inlet and a light outlet opposite each other. The light inlet and the light outlet include two opposite reflective surfaces A31 and A32. The width of the light outlet of the third reflector cup in the B direction is b. 3-out The width of the third reflector cup light entrance in direction B is b 3-in , the distance from the light entrance to the light exit is h3, where b 3-out >b 3-in , and b 3-in +b 3-out <2h3. Light emitted by the third light source 2631 enters the third reflector through the light inlet of the third reflector. A portion of the light passes through the third reflector and exits directly through the light outlet. The remaining light is incident on the reflective surface A31 or the reflective surface A32 of the third reflector and is reflected therefrom before exiting through the light outlet. The third lens 2633 is an imaging lens, used to project and image the light distribution from its focal plane into the far field. Light emitted from the light outlet of the third reflector 2632 enters the third lens and is projected into the far field, forming a third light spot 2664. The energy of the light on the -B side of the light-dark boundary line Bc in the third light spot 2664 accounts for no less than 80% of the total energy of the third light spot 2664.

[0158] Regarding the working principle of the third light-emitting group, the previous embodiments have been fully described and will not be repeated here. In this embodiment, the third lens 2633 of the third light-emitting group is arranged along the B direction together with the first lens 2603 of the first light-emitting group and the second lens 2613 of the second light-emitting group, and overlaps in the A direction (this view is the same as Figure 24b, so it is not drawn repeatedly). The purpose is to obtain the shape of a vertical strip outlet. Obviously, the order of the first lens, the second lens, and the third lens can be interchanged at will. At the same time, since the third light source 2631 is used to form a far-field light spot 2664, most of the energy of the far-field light spot 2664 overlaps with the light spot 2661, so the brightness of the low beam center light spot can be enhanced.

[0159] Preferably, the third light-emitting group further includes a fourth reflective cup 2642 located on the -B side of the third reflective cup 2632, and further includes a fourth light source 2641. The fourth reflective cup 2642 extends congruently along the A direction. The fourth reflective cup includes a light inlet and a light outlet relative to each other. The light inlet and the light outlet include two relative reflective surfaces A41 and A42. The width of the light outlet of the fourth reflective cup in the B direction is b. 4-out The width of the fourth reflector cup light entrance in direction B is b 4-in , the distance from the light entrance to the light exit is h4, where b 4-out >b 4-in , and b 4-in +b 4-out <2h4. Light emitted by the fourth light source 2641 enters the fourth reflector cup 2642 through the light inlet. A portion of the light passes through the fourth reflector cup and exits directly through the light outlet. The remaining light is incident on the A41 or A42 reflective surface of the fourth reflector cup and reflected therefrom before exiting through the light outlet. The light exiting the light outlet of the fourth reflector cup 2642 enters the third lens 2633 and is projected into the far field, forming a fourth light spot 2665. The energy of the light on the +B side of the bright / dark boundary Bc in the fourth light spot 2665 accounts for no less than 50% of the total energy of the fourth light spot. In other words, the majority of the energy (greater than or equal to 50%) of the fourth light spot lies above the bright / dark boundary Bc. Therefore, the fourth light spot 2665 serves as supplemental illumination for the high beam or low beam of the vehicle lamp.

[0160] Another difference between this embodiment and the embodiment shown in Figure 24a is that this embodiment also includes a first light-shielding plate 2671 located between the first lens 2603 and the second lens 2613, and a second light-shielding plate 2672 located between the second lens 2613 and the third lens 2633. These two light-shielding plates are located at the front end of the optical path of the three lenses and are used to prevent light such as light 2628 from entering adjacent lenses to form "crosstalk", thereby eliminating stray light.

[0161] The structure of another embodiment of a vehicle lamp according to the present invention is shown in Figure 27a , and its far-field light distribution is schematically shown in Figure 27c . Unlike the embodiment shown in Figure 26a , this embodiment further includes a fourth light-emitting group 2794, which comprises a laser diode 2741, a wavelength conversion plate 2742, and a fourth lens 2743. Laser diode 2741 emits laser light 2747, which excites phosphor conversion plate 2742 to generate converted light 2748. This converted light is incident on fourth lens 2743, refracted by the lens, and emerges as collimated light 2748. This collimated light 2748 forms a fifth light spot 2766 in the far field. The energy of this fifth light spot 2766, located on the +B side of the bright / dark boundary line Bc, accounts for no less than 50% of the total energy of the fifth light spot 2766. The laser diode 2741 can generate high-brightness excitation light, so that the fourth lens 2743 does not need to be very large to form a high-brightness fifth light spot 2766. Most of the energy of the fifth light spot is higher than the light-dark boundary line Bc, so it can be used for high-beam lighting. The fifth light spot 2766 coincides with the center of the fourth light spot 2765 in direction A (horizontal direction), so the fifth light spot can also be used to supplement the brightness of the high-beam center. Obviously, even without the fourth light spot, the fifth light spot itself can also be used for high-beam lighting. Preferably, in this embodiment, the width of the fifth light spot 2766 in direction A is greater than the width in direction B, which is more in line with the general requirement that the vehicle light has a large illumination range in the horizontal direction and a small illumination range in the vertical direction, and is more convenient to use. Of course, the fifth light spot 2766 can also be circular, square, or rounded-corner square, with its width in direction A being equal to its width in direction B, or even smaller than its width in direction B. In practical applications, the fifth light spot 2766 does not necessarily need to illuminate a wide range in direction A. Its primary function is to enhance the central intensity of the high beam. In this embodiment, preferably, another fourth light group 2795 is included, operating in the same principle as light group 2794. The far-field light spot coincides with the center of the fifth light spot 2766 to enhance the central brightness of the high beam. It is understood that the far-field light spot emitted by the fourth light group 2795 can also be non-coincidental with the fifth light spot 2766 to achieve a wider illumination range. Of course, they can also have different shapes. For example, a circular light spot, combined with an elliptical fifth light spot 2766, can achieve both a wide horizontal illumination range and a higher central intensity. Of course, having only one fourth light group is also possible.

[0162] In this embodiment, the lenses of each light-emitting group are arranged along direction B. The order can be changed to obtain the shape of a vertical strip outlet. Preferably, the lenses of each light-emitting group in this embodiment are integrally formed, and the integrally formed stereoscopic view is shown in Figure 27b.

[0163] Another difference between this embodiment and the embodiment shown in FIG26a is that, in this embodiment, the first light-emitting group further includes a fifth reflective cup 2762 located on the -B side of the first reflective cup 2702, and further includes a fifth light source 2761. The fifth reflective cup 2762 extends congruently along the A direction. The fifth reflective cup 2762 includes a light inlet and a light outlet opposite to each other. Two opposite reflective surfaces A51 and A52 are included between the light inlet and the light outlet. The width of the light outlet of the fifth reflective cup in the B direction is b. 5-out The width of the light entrance of the fifth reflector cup in the direction B is b 5-in , the distance from the light entrance to the light exit is h5, where b 5-out >b 5-in , and b 5-in +b 5-out <2h5. Light emitted by the fifth light source 2761 enters the fifth reflector cup 2762 through the light inlet of the fifth reflector cup 2762. A portion of the light passes through the fifth reflector cup and exits directly through the light outlet. The remaining portion of the light enters and is reflected by the A51 or A52 reflective surface of the fifth reflector cup before exiting through the light outlet. The light exiting the light outlet of the fifth reflector cup 2762 enters the first lens 2703 and is projected into the far field to form a sixth light spot 2767. The energy of the light on the +B side of the light-dark boundary line Bc in the sixth light spot 2767 accounts for no less than 80% of the total energy of the sixth light spot. Obviously, the fifth reflector 2762 is located on the -B side of the first reflector 2702. The two reflectors can share the same lens 2703 to save volume. The sixth light spot 2767 formed by the fifth reflector 2762 through the lens 2703 is necessarily located on the +B side of the light spot 2761 formed by the first reflector 2702. Most of its energy is located above the bright-dark boundary Bc, and is used to supplement the brightness of the high beam.

[0164] In the above-mentioned automotive lamp embodiments, based on the embodiment shown in FIG24a, light-emitting groups are sequentially added to enhance the far-field light distribution or increase brightness. The primary embodiments all illustrate a configuration in which the lenses of each light-emitting group are arranged along direction B and overlap along direction A, thereby forming a lamp with a vertical strip-shaped light outlet. Obviously, it is also possible to arrange the lenses of multiple light-emitting groups along direction A and overlap along direction B, as in the embodiment shown in FIG25a and FIG25b. Furthermore, by adding new light-emitting groups along direction A, a horizontal strip-shaped light outlet can be formed while achieving a more complex or brighter light distribution (for example, using the light-emitting groups shown in FIG13a and FIG13b, where the lenses are wider in direction A than in direction B). This also conforms to current automotive headlamp design concepts. In fact, the present invention does not limit the arrangement of the light-emitting groups; as long as the far-field light spots of the light-emitting groups meet the requirements when combined, they fall within the scope of protection of the present invention. For example, a portion of the lenses can be arranged along direction B and another portion along direction A, forming a rectangular light outlet design that can be placed at the corner of the front of a car, such as the one-piece lens shown in Figure 28. This design, which is completely unattainable with the prior art, can be achieved with the present invention. The one-piece lens shown in Figure 29 is another possible combination.

[0165] In the above description, sin(x) represents the sine function of x, tan(x) represents the tangent function of x; asin(x) represents the inverse sine function of x, and atan(x) represents the inverse tangent function of x.

[0166] It should be noted that the distinguishing technical features between the various embodiments of the present invention are not limited to being applied to their respective embodiments, but can be applied to various embodiments. It is impossible to list all possible combinations in the description of the present invention. Therefore, the implementation principles and beneficial effects of various technical features are explained by way of examples. When applied to other embodiments, people in this technical field will use their implementation principles to achieve the beneficial effects.

[0167] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vehicle lamp, characterized in that: The method comprises a first light-emitting group and a second light-emitting group, wherein: The first light-emitting group includes a first light source, a first reflective cup and a first lens; the first reflective cup extends congruently along the A direction, the first reflective cup includes a relative light inlet and a light outlet, and two relative A11 reflective surfaces and A12 reflective surfaces are included between the light inlet and the light outlet. The B direction is orthogonal to the A direction, and the width of the light outlet of the first reflective cup in the B direction is b 1-out , the width of the first reflector cup light entrance in direction B is b 1-in , the distance from the light entrance to the light exit is h1, where b 1-out >b 1-in , and b 1-in +b 1-out <2h1; the light emitted by the first light source is incident on the first reflector cup from the light inlet of the first reflector cup, a part of the light passes through the first reflector cup and directly exits from the light outlet, and the remaining part of the light is incident on the A11 reflective surface or the A12 reflective surface of the first reflector cup and is reflected therefrom and then exits from the light outlet; the first lens is an imaging lens, which is used to project and image the light distribution of its focal plane to the far field, and the light exiting from the light outlet of the first reflector cup is incident on the first lens and is projected to the far field by it; it also includes a first shaping reflective surface extending congruently along the A direction and located between the first reflector cup and the first lens optical path, the first end of the first shaping reflective surface is close to the light outlet of the first reflector cup, and the second end extends toward the first lens; The second light emitting group includes a second light source, a second reflective cup and a second lens; the second reflective cup extends congruently along the B direction, the second reflective cup includes a light inlet and a light outlet opposite to each other, and two opposite reflection surfaces B21 and B22 are included between the light inlet and the light outlet; the width of the light outlet of the second reflective cup in the A direction is a 2-out , the width of the second reflector cup light entrance in direction A is a 2-in , the distance from the light entrance to the light exit is h2, where a 2-out >a 2-in , and a 2-in +a 2-out <2h2; the light emitted by the second light source is incident on the second reflector cup from the light inlet of the second reflector cup, a part of the light passes through the second reflector cup and directly exits from the light outlet, and the remaining part of the light is incident on the B21 reflection surface or the B22 reflection surface of the second reflector cup and is reflected therefrom and then exits from the light outlet; the second lens is an imaging lens, which is used to project and image the light distribution of its focal plane to the far field, and the light emitted from the light outlet of the second reflector cup is incident on the second lens and is projected to the far field by it; it also includes a refractive element extending congruently along the B direction and located at the rear end of the optical path of the light outlet of the second reflector cup, and after the light emitted along the optical axis direction of the light emitted by the second reflector cup is incident on the refractive element and is refracted by the refractive element, the exit direction changes in the A direction relative to its incident direction.

2. The vehicle lamp according to claim 1, characterized in that: The second light-emitting group also includes an A21 reflection surface and an A22 reflection surface extending congruently along direction A. The A21 reflection surface, the B21 reflection surface, the A22 reflection surface, and the B22 reflection surface are connected to form a second reflection channel. The light emitted by the second light source is incident from the light entrance of the second reflection channel, and is emitted from the light exit of the second reflection channel after propagating in the second reflection channel. The light emitted from the light exit of the second reflection channel is incident on the second lens and is projected to the far field by the second lens.

3. The vehicle lamp according to claim 1 or 2, characterized in that: It also includes a second shaping reflective surface located between the second reflective cup and the second lens optical path and extending congruently along direction B, wherein a first end of the second shaping reflective surface is close to the light outlet of the second reflective cup and a second end extends toward the second lens.

4. The vehicle lamp according to claim 1 or 2, characterized in that: The refractive element comprises a positive refractive zone and a negative refractive zone. After the light emitted along the optical axis direction of the second reflective cup is incident on the positive refractive zone and refracted by the positive refractive zone, the emission direction is deflected toward the +A direction relative to the incident direction; after the light emitted along the optical axis direction of the second reflective cup is incident on the negative refractive zone and refracted by the negative refractive zone, the emission direction is deflected toward the -A direction relative to the incident direction.

5. The vehicle lamp according to claim 1, characterized in that: The first light-emitting group forms a first light spot in the far field, and there is a light-dark boundary line in the first light spot. The energy of the light on the side of the light-dark boundary line -B of the first light spot accounts for no less than 80% of the total energy of the first light spot; the second light-emitting group forms a second light spot in the far field, and the energy of the light on the side of the light-dark boundary line -B of the second light spot accounts for no less than 80% of the total energy of the second light spot.

6. The vehicle lamp according to claim 5, characterized in that: The third light-emitting group includes a third light source, a third reflective cup and a third lens. The third reflective cup extends congruently along the A direction. The third reflective cup includes a light inlet and a light outlet relative to each other. The light inlet and the light outlet include two relative reflective surfaces A31 and A32. The width of the light outlet of the third reflective cup in the B direction is b. 3-out , the width of the light entrance of the third reflector cup in the B direction is b 3-in , the distance from the light entrance to the light exit is h3, where b 3-out >b 3-in , and b 3-in +b 3-out <2h3; the light emitted by the third light source is incident on the third reflector cup from the light inlet of the third reflector cup, a part of the light passes through the third reflector cup and directly exits from the light outlet, and the remaining part of the light is incident on the A31 reflective surface or the A32 reflective surface of the third reflector cup and is reflected therefrom and then exits from the light outlet; the third lens is an imaging lens, which is used to project and image the light distribution of its focal plane to the far field, the light exiting from the light outlet of the third reflector cup is incident on the third lens and is projected by it to the far field to form a third light spot, and the energy of the light on the side of the light-dark boundary line -B of the third light spot accounts for no less than 80% of the total energy of the third light spot.

7. The vehicle lamp according to claim 6, characterized in that: The third light-emitting group further includes a fourth reflector cup located on the side of the third reflector cup in the -B direction, and further includes a fourth light source. The fourth reflector cup extends congruently along the A direction. The fourth reflector cup includes a relative light inlet and a light outlet. The light inlet and the light outlet include two relative A41 reflective surfaces and A42 reflective surfaces. The width of the light outlet of the fourth reflector cup in the B direction is b. 4-out , the width of the fourth reflector cup light entrance in direction B is b 4-in , the distance from the light entrance to the light exit is h4, where b 4-out >b 4-in , and b 4-in +b 4-out <2h4; the light emitted by the fourth light source is incident on the fourth reflector cup from the light inlet of the fourth reflector cup, a part of the light passes through the fourth reflector cup and directly exits from the light outlet, the remaining part of the light is incident on the A41 reflective surface or the A42 reflective surface of the fourth reflector cup and is reflected thereby and then exits from the light outlet, the light exiting from the light outlet of the fourth reflector cup is incident on the third lens and is projected by the third lens to the far field to form a fourth light spot, and the energy of the light of the fourth light spot located on the side of the light-dark boundary line +B accounts for no less than 50% of the total energy of the fourth light spot.

8. The vehicle lamp according to claim 5, characterized in that: It also includes a fourth light-emitting group, which includes a laser diode, a wavelength conversion plate and a fourth lens. The laser diode emits laser, which excites the fluorescent conversion plate to generate converted light, and the converted light is incident on the fourth lens and refracted by the fourth lens to form collimated light output; the collimated light forms a fifth light spot in the far field, and the energy of the fifth light spot located on the side of the light-dark boundary line +B accounts for no less than 50% of the total energy of the fifth light spot.

9. The vehicle lamp according to claim 8, characterized in that: The width of the fifth light spot in the A direction is greater than the width in the B direction.

10. The vehicle lamp according to claim 5, characterized in that: The first light-emitting group further includes a fifth reflector cup located on the side of the first reflector cup in the -B direction, and further includes a fifth light source. The fifth reflector cup extends congruently along the A direction. The fifth reflector cup includes a relative light inlet and a light outlet. The light inlet and the light outlet include two relative A51 reflective surfaces and A52 reflective surfaces. The width of the light outlet of the fifth reflector cup in the B direction is b. 5-out , the width of the light entrance of the fifth reflector cup in the B direction is b 5-in , the distance from the light entrance to the light exit is h5, where b 5-out >b 5-in , and b 5-in +b 5-out <2h5; the light emitted by the fifth light source is incident on the fifth reflector cup from the light inlet of the fifth reflector cup, a part of the light passes through the fifth reflector cup and directly exits from the light outlet, the remaining part of the light is incident on the A51 reflective surface or the A52 reflective surface of the fifth reflector cup and is reflected therefrom and then exits from the light outlet, the light exiting from the light outlet of the fifth reflector cup is incident on the first lens and is projected by it to the far field to form a sixth light spot, and the energy of the light on the side of the light-dark boundary line +B of the sixth light spot accounts for no less than 80% of the total energy of the sixth light spot.

Images