Multi-lamp-bead dual-light LED automobile headlamp

Abstract

The application discloses a kind of multi-lamp bead double light LED car headlamps, including lamp plate, reflector and glass lens.Reflector includes first reflector and the second reflector and third reflector of its far end, and the curvature radius of the reflecting surface of second reflector and third reflector is identical, and different from the curvature radius of the reflecting surface of first reflector, first, second and third lamp beads are respectively set on lamp plate with first, second and third reflector corresponding.The curvature radius of the reflecting surface of second reflector and third reflector is less than the curvature radius of the reflecting surface of first reflector.The application is by setting three-cup integrated reflector structure with different reflecting curvature radius, using different lamp beads to cooperate different reflector, improve far, near light light type uniformity and brightness, play good light supplement effect.It is also by setting angle limitation of second and third reflector, can obtain better light supplement light type and brightness, and avoid stray light, improve output luminous flux and light type uniformity.

Description

Technical Field

[0001] This invention relates to the field of automotive headlight technology, and in particular to a multi-LED bi-beam automotive headlight. Background Technology

[0002] Existing single-cup LED automotive headlights typically consist of one LED chip, one reflector, one beam-cutting mechanism, and a glass lens. This optical solution is simple in structure, highly efficient in production, and produces uniform light patterns. However, its brightness and illumination effect are generally average. The main drawbacks are the lack of supplementary lighting for both high and low beams, low brightness at the center point, poor penetration, and reduced vehicle driving safety. Currently, some optical solutions incorporate separate, oppositely positioned low and high beam reflectors, but these are more complex and bulky, failing to meet the requirements of automotive headlights.

[0003] Therefore, it is evident that the existing LED automotive headlights still have inconveniences and defects in terms of structure, method, and use, and urgently need further improvement. The question is how to create a new multi-LED bi-xenon LED automotive headlight that overcomes the shortcomings of existing LED automotive headlights. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-LED bi-beam LED automotive headlight, which achieves a three-cup integrated structure by improving the reflector structure, so as to meet the needs of high and low beam supplementary lighting, with simple structure and small size, thereby overcoming the shortcomings of existing LED automotive headlights.

[0005] To solve the above-mentioned technical problems, the present invention provides a multi-LED bi-xenon LED automotive headlight, including a lamp panel, reflectors, a light-cutting mechanism, and a glass lens. The reflectors include a first reflector and a second and a third reflector disposed at the distal end of the first reflector. The second and third reflectors have the same radius of curvature of their reflective surfaces, which is different from that of the first reflector. The lamp panel is provided with a first LED, a second LED, and a third LED. The light emitted by the first LED is reflected by the first reflector and then emitted parallel from the lower part of the glass lens. The light emitted by the second and third LEDs is reflected by the second and third reflectors, respectively, and then emitted parallel from the lower part of the glass lens, thereby providing supplementary lighting for the light emitted by the first LED.

[0006] In a further improvement, the radii of curvature of the reflective surfaces of the second and third reflectors are smaller than the radii of curvature of the reflective surface of the first reflector.

[0007] In a further improvement, the second and third reflectors are symmetrically arranged along the centerline of the first reflector.

[0008] In a further improvement, the focal points of the second and third reflectors are respectively connected to the focal point of the glass lens, with the included angle between the two lines being 10 to 40°.

[0009] In a further improvement, the focal points of the second and third reflectors are respectively connected to the focal point of the glass lens, with the included angle between the two lines being 20-30°.

[0010] In a further improvement, the distance between the second and third lamp beads and the focal point of the glass lens is equal, and both are 36.4 to 40.4 mm.

[0011] Further improvements include the first, second, and third LEDs being located on the same side of the same lamp panel, and the first, second, and third reflectors being a single integrated cup structure.

[0012] Further improvements include at least one direct lighting mechanism.

[0013] In a further improvement, the direct lighting mechanism adopts a direct LED lighting mechanism, which includes a direct LED lamp bead, a direct light-receiving lens, and a direct glass lens arranged in sequence, with the direct glass lens located in the upper region of the glass lens.

[0014] In a further improvement, the direct illumination mechanism adopts a direct laser illumination mechanism, which includes a direct laser source and a corresponding high-beam direct laser lens, with the high-beam direct laser lens disposed in the upper region of the glass lens.

[0015] With this design, the present invention has at least the following advantages:

[0016] 1. The present invention, a multi-LED dual-bead LED automotive headlight, improves the reflector cup to form a three-cup integrated structure with different reflector surface curvature radii. By using different LED beads in conjunction with reflector cups with different reflector surface curvature radii, the uniformity and brightness of the high and low beam patterns are improved, resulting in a better supplementary lighting effect.

[0017] 2. Furthermore, by limiting the angles of the second and third reflectors, better fill light pattern and brightness can be obtained, stray light can be avoided, and the output luminous flux and light pattern uniformity can be improved.

[0018] 3. Furthermore, by setting up a direct beam supplement mechanism, the car headlight can further supplement the high and low beams on the basis of the improved high and low beam patterns, greatly enhancing the brightness and penetration of the high beam. Attached Figure Description

[0019] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-LED bi-bead automotive headlight of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of an embodiment of the multi-LED bi-bead automotive headlight of the present invention. Figure 2 .

[0022] Figure 3 This is a side view of the structure of an embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0023] Figure 4 This is a top view of the structure of an embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0024] Figure 5 This is a bottom view of the structure of an embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0025] Figure 6 This is a schematic diagram of the lamp board structure in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0026] Figure 7 This is a schematic diagram of the outer structure of the reflector cup in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0027] Figure 8 This is a schematic diagram of the inner structure of the reflector cup in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0028] Figure 9 This is a schematic diagram of the position and structure of the second and third reflectors in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0029] Figure 10 This is a schematic diagram of the low beam path of an embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0030] Figure 11 This is a schematic diagram of the high beam path of an embodiment of the multi-LED dual-bead automotive headlight of the present invention.

[0031] Figure 12 This is a supplementary light pattern diagram of the second and third reflectors with an angle of 10° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0032] Figure 13This is the overall high beam pattern diagram of the second and third reflectors with an angle of 10° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0033] Figure 14 This is a supplementary light pattern diagram of the second and third reflectors with an angle of 20° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0034] Figure 15 This is the overall high beam pattern diagram of the second and third reflectors with an angle of 20° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0035] Figure 16 This is a supplementary light pattern diagram of the second and third reflectors with an angle of 30° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0036] Figure 17 This is the overall high beam pattern diagram of the second and third reflectors with an angle of 30° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0037] Figure 18 This is a supplementary light pattern diagram of the second and third reflectors with an angle of 40° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0038] Figure 19 This is an overall high beam pattern diagram of the second and third reflectors with an angle of 40° in Embodiment 1 of the multi-LED bi-bead automotive headlight of the present invention.

[0039] Figure 20 This is a schematic diagram of the overall structure of Embodiment 2 of the multi-LED bi-bead automotive headlight of the present invention.

[0040] Figure 21 This is a schematic diagram of the internal structure of a second embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0041] Figure 22 This is a side view of the structure of a second embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0042] Figure 23 This is a high beam supplement light path diagram of Embodiment 2 of the multi-LED bi-bead automotive headlight of the present invention.

[0043] Figure 24 This is a schematic diagram of the overall structure of Embodiment 3 of the multi-LED bi-bead automotive headlight of the present invention.

[0044] Figure 25 This is a schematic diagram of the internal structure of a third embodiment of the multi-LED bi-bead automotive headlight of the present invention.

[0045] Figure 26This is a structural side view of Embodiment 3 of the multi-LED bi-bead automotive headlight of the present invention.

[0046] Figure 27 This is a direct laser fill light path diagram of Embodiment 3 of the multi-LED dual-bead automotive headlight of the present invention.

[0047] Figure 28 This is a schematic diagram of the overall structure of Embodiment 4 of the multi-LED bi-bead automotive headlight of the present invention.

[0048] Figure 29 This is a schematic diagram of the internal structure of Embodiment 4 of the multi-LED bi-bead automotive headlight of the present invention. Figure 1 .

[0049] Figure 30 This is a schematic diagram of the internal structure of Embodiment 4 of the multi-LED bi-bead automotive headlight of the present invention. Figure 2 .

[0050] Figure 31 This is a direct supplementary light path diagram of Embodiment 4 of the multi-LED dual-bead automotive headlight of the present invention. Detailed Implementation

[0051] Example 1

[0052] This embodiment of a multi-LED bi-xenon automotive headlight includes a glass lens 10, a reflector 20, a lamp panel 30, and a beam-cutting mechanism 40. LEDs are mounted on the lamp panel 30. The light emitted by the LEDs is reflected by the reflector 20 and then exits through the glass lens 10, forming the high and low beam patterns of the automotive headlight. The high and low beam patterns are achieved through the beam-cutting mechanism 40. The lamp panel 30 uses a copper substrate, and the glass lens 10 uses a conventional circular lens.

[0053] See attached document Figures 1 to 5 As shown, the reflector 20 in this embodiment adopts a three-cup integrated structure, including a first reflector 21 and a second reflector 22 and a third reflector 23 disposed at the distal end of the first reflector 21. The second reflector 22 and the third reflector 23 have the same reflective surface curvature radius, but they are different from the reflective surface curvature radius of the first reflector 21. For example, the reflective surface curvature radius of the second reflector 22 and the third reflector 23 is smaller than that of the first reflector 21. It should be noted that the distal end of the first reflector 21 in this application is the end farther from the glass lens 10.

[0054] The upper part of the lamp panel 30 is provided with a first lamp bead 31, a second lamp bead 32 and a third lamp bead 33 on the same side, as shown in the attached figure. Figure 6As shown. The light emitted by the first LED 31 is reflected by the first reflector 21 and then emitted parallel from the lower part of the glass lens 10. The second LED 32 and the third LED 33 are high-power-density circular LEDs with a light-emitting diameter of 50 mil. The light emitted by the second LED 32 and the third LED 33 is reflected by the second reflector 22 and the third reflector 23, respectively, and then emitted parallel from the lower part of the glass lens 10, serving to supplement the light emitted by the first LED 31. Since the radius of curvature of the reflective surfaces of the second reflector 22 and the third reflector 23 is smaller than that of the reflective surface of the first reflector 21, the light emitted from the second LED 22 and the third LED 23 from the glass lens 10 is closer to the central area of ​​the glass lens 10, resulting in better supplementary lighting. (See attached image) Figure 10 A schematic diagram of the low beam path of the multi-LED bi-xenon automotive headlight of this embodiment is shown. Figure 11 This diagram illustrates the high beam path of the multi-LED bi-bead automotive headlight of this embodiment.

[0055] The second reflector 22 and the third reflector 23 are symmetrically arranged along the centerline of the first reflector 21, as shown in the attached figure. Figure 7 and 8 As shown.

[0056] More specifically, as shown in the appendix Figure 9 As shown, the focal points of the second reflector 22 and the third reflector 23 are respectively connected to the focal point of the glass lens 10, and the included angle between the two lines is 10-40°. Preferably, it is 20-30°, more preferably 20°. The distances between the second lamp bead 32 and the third lamp bead 33 and the focal point of the glass lens 10 are equal, and both are 36.4-40.4 mm, preferably 38.4 mm.

[0057] Test of position setting parameters for the second reflector 22 and the third reflector 23

[0058] (1) Connect the focal points of the second reflector 22 and the third reflector 23 to the focal point of the glass lens 10, respectively, so that the included angle between the two lines is 10°. Observe the isoilluminance diagram of the supplementary light pattern achieved by the second reflector 22 and the third reflector 23 and the obtained overall high beam pattern. The luminous flux of the second LED 32 and the third LED 33 is 600 lumens. The luminous flux of the first LED 31 is 3480 lumens.

[0059] Appendix Figure 12 The diagram shows the isolux profile of the supplementary light pattern of the multi-LED bi-xenon automotive headlight of this embodiment at an angle of 10°. (Attached) Figure 13 The diagram shows the overall high beam pattern of the multi-LED bi-bead automotive headlight of this embodiment at an angle of 10°.

[0060] From the appendix Figure 12 It can be seen that there is a lot of stray light in the beam pattern, the output luminous flux is 440 lumens, the maximum central brightness is 25800 cd, the output luminous flux is low, the horizontal width is not good, and there is a lot of stray light in the beam pattern within the horizontal range of -15 to 15° and the vertical range of 5 to 10°, making the beam pattern less than ideal. (See attached...) Figure 13 It can be seen that there is a lot of stray light on the beam pattern, the output luminous flux is 1890 lumens, the maximum brightness at the center is 42200 cd, the overall output luminous flux is average, the beam pattern uniformity is good, but there is a lot of stray light in the beam pattern within the horizontal range of -15 to 15 degrees and the vertical range of 5 to 10 degrees.

[0061] (2) Connect the focal points of the second reflector 22 and the third reflector 23 to the focal point of the glass lens 10, respectively, so that the included angle between the two lines is 20°. Observe the isoilluminance diagram of the supplementary light pattern achieved by the second reflector 22 and the third reflector 23, and the obtained overall high beam pattern diagram. The luminous flux of the second LED 32 and the third LED 33 is 600 lumens. The luminous flux of the first LED 31 is 3480 lumens.

[0062] Appendix Figure 14 The diagram shows the isolux profile of the supplementary light pattern of the multi-LED bi-xenon automotive headlight of this embodiment at an angle of 20°. (Attached) Figure 15 The diagram shows the overall high beam pattern of the multi-LED bi-bead automotive headlight of this embodiment at an angle of 20°.

[0063] From the appendix Figure 14 As can be seen, the light pattern has no stray light, the output luminous flux is 507 lumens, the maximum center brightness is 34800 cd, which is good. The maximum horizontal width is about 18°, indicating a wide range and good light pattern. (See attached...) Figure 15 It can be seen that there is less stray light on the beam pattern, the output luminous flux is 1910 lumens, the maximum brightness at the center is 49700 cd, the overall output luminous flux is high, and the beam pattern uniformity is good.

[0064] (3) Connect the focal points of the second reflector 22 and the third reflector 23 to the focal point of the glass lens 10, respectively, so that the included angle between the two lines is 30°. Observe the isoilluminance diagram of the supplementary light pattern achieved by the second reflector 22 and the third reflector 23, and the obtained overall high beam pattern diagram. The luminous flux of the second LED 32 and the third LED 33 is 600 lumens. The luminous flux of the first LED 31 is 3480 lumens.

[0065] Appendix Figure 16 The diagram shows the isolux profile of the supplementary light pattern of the multi-LED bi-xenon automotive headlight of this embodiment at an angle of 30°. (Attached) Figure 16The diagram shows the overall high beam pattern of the multi-LED bi-bead automotive headlight of this embodiment at an angle of 30°.

[0066] From the appendix Figure 16 As can be seen, the light pattern has no stray light, the output luminous flux is 516 lumens, the maximum center brightness is 37300 cd, which is good. The maximum horizontal width is about 18°, indicating a wide range and good light pattern. (See attached...) Figure 17 It can be seen that there is less stray light on the beam pattern, the output luminous flux is 1940 lumens, the maximum brightness at the center is 54300 cd, the overall output luminous flux is high, and the beam pattern uniformity is good.

[0067] (4) Connect the focal points of the second reflector 22 and the third reflector 23 to the focal point of the glass lens 10, respectively, so that the included angle between the two lines is 40°. Observe the isolux diagram of the supplementary light pattern achieved by the second reflector 22 and the third reflector 23 and the obtained overall high beam pattern. The luminous flux of the second LED 32 and the third LED 33 is 600 lumens. The luminous flux of the first LED 31 is 3480 lumens.

[0068] Appendix Figure 18 The diagram shows the isolux profile of the supplementary light pattern of the multi-LED bi-xenon automotive headlight of this embodiment at an angle of 40°. (Attached) Figure 19 The diagram shows the overall high beam pattern of the multi-LED bi-bead automotive headlight of this embodiment at an angle of 40°.

[0069] From the appendix Figure 18 It can be seen that the light pattern has no stray light, the output luminous flux is 484 lumens, and the maximum brightness at the center is 37400 cd. The maximum brightness is high, but the horizontal width is less than 15°, resulting in a narrow supplementary lighting range. (See attached...) Figure 19 It can be seen that there is less stray light on the light pattern, the output luminous flux is 1960 lumens, and the maximum brightness at the center is 58400 cd. However, the width from left to right is only 14°, and there is a significant brightness gradient change in the light pattern near the horizontal 1°, resulting in uneven brightness.

[0070] In summary, considering the uniformity of the light pattern, brightness, and stray light angle, an angle of 10–40° achieves good light pattern compensation and high brightness, while a range of 20–30° provides even better uniformity, high brightness, and no stray light. Furthermore, considering that smaller widths of the second and third reflectors are more beneficial for heat sink design, an angle of 20° is the optimal choice.

[0071] Example 2

[0072] The difference between this embodiment and Embodiment 1 described above is that, as shown in the appendix... Figures 20 to 23As shown, the multi-LED bi-bead automotive headlight also includes a direct illumination mechanism.

[0073] The direct lighting mechanism is a direct LED lighting mechanism 50. The direct LED lighting mechanism 50 includes a direct LED lamp bead 51, a direct light receiving lens 52, and a direct glass lens 53 arranged in sequence. The direct glass lens 53 is disposed in the upper region of the glass lens 10.

[0074] The direct-view glass lens 53 is integrally formed with the glass lens 10.

[0075] Appendix Figure 23 The diagram shows the light path of the high beam supplement light of the multi-LED bi-bead automotive headlight in this embodiment.

[0076] The remaining structures of this embodiment are the same as those of Embodiment 1, which can further realize direct beam supplementary lighting based on Embodiment 1.

[0077] Example 3

[0078] The difference between this embodiment and Embodiment 1 described above is that, as shown in the appendix... Figures 24 to 26 As shown, the multi-LED bi-bead automotive headlight also includes a direct laser illumination mechanism 60.

[0079] The direct laser supplementary lighting mechanism 60 includes a direct laser source 61 and a corresponding high-beam direct laser lens 62, which is disposed in the upper region of the glass lens 10.

[0080] Furthermore, as attached Figure 27 As shown, the direct laser illumination mechanism 60 may include two sets, symmetrically arranged in the upper region of the glass lens 10. Specifically, it includes two direct laser sources 61 and 63, and two high-beam direct laser lenses 62 and 64. The two high-beam direct laser lenses 62 and 64 are symmetrically arranged in the upper region of the glass lens 10. (See attached image) Figure 27 The diagram shows the light path of the direct laser illumination mechanism of the multi-LED dual-bead automotive headlight in this embodiment.

[0081] The remaining structures of this embodiment are the same as those of Embodiment 1, and it can further realize direct laser illumination for long beams based on Embodiment 1.

[0082] Example 4

[0083] The difference between this embodiment and Embodiment 2 described above is that, as shown in the appendix... Figures 28 to 31As shown, the multi-LED bi-xenon automotive headlight includes three direct-beam supplementary lighting mechanisms 70. Each of the three direct-beam supplementary lighting mechanisms 70 includes three direct-beam LEDs 71, 72, and 73, three direct-beam receiving lenses 74, 75, and 76, and three direct-beam glass lenses 77, 78, and 79, forming three sets of direct-beam supplementary lighting mechanisms. The three direct-beam glass lenses 77, 78, and 79 are evenly distributed in the upper region of the glass lens 10.

[0084] Appendix Figure 31 The diagram shows the light path of the direct illumination mechanism of the multi-LED bi-bead automotive headlight in this embodiment, which can achieve more uniform direct illumination of the high beam.

[0085] In the description of this invention, it should be noted that the terms "upper", "lower", "far end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.

Claims

1. A multi-LED bi-xenon automotive headlight, comprising a lamp panel, a reflector, a beam-cutting mechanism, and a glass lens, characterized in that, The reflector cup includes a first reflector cup and a second and a third reflector cup disposed at the far end of the first reflector cup. The second and third reflector cups have the same radius of curvature of their reflective surfaces, and both are different from the radius of curvature of the reflective surface of the first reflector cup. The lamp plate is provided with a first lamp bead, a second lamp bead, and a third lamp bead. The light emitted by the first lamp bead is reflected by the first reflector cup and then emitted parallel from the lower part of the glass lens. The light emitted by the second and third lamp beads is reflected by the second and third reflector cups, respectively, and then emitted parallel from the lower part of the glass lens, which is used to supplement the light emitted by the first lamp bead. The second and third reflectors have a smaller radius of curvature of reflective surface than the first reflector, and the second and third reflectors are symmetrically arranged along the centerline of the first reflector. The focal points of the second and third reflectors are respectively connected to the focal point of the glass lens. The included angle between the two lines is 20~30°. The distances between the second and third LEDs and the focal point of the glass lens are equal and are both 36.4~40.4mm. The first, second, and third LEDs are all located on the same side of the same lamp panel, and the first, second, and third reflectors are an integral cup structure.

2. The multi-LED bi-xenon headlight according to claim 1, characterized in that, It also includes at least one direct lighting mechanism.

3. The multi-LED bi-xenon headlight according to claim 2, characterized in that, The direct lighting mechanism is a direct LED lighting mechanism, which includes a direct LED lamp bead, a direct light receiving lens and a direct glass lens arranged in sequence, with the direct glass lens located in the upper region of the glass lens.

4. The multi-LED bi-xenon headlight according to claim 2, characterized in that, The direct-light supplementary lighting mechanism is a direct-light laser supplementary lighting mechanism, which includes a direct-light laser source and a corresponding high-beam direct-light laser lens. The high-beam direct-light laser lens is disposed in the upper region of the glass lens.

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