Car lamp

Abstract

The utility model relates to a car lamp which comprises a heat dissipation substrate, a condensation light source and a floodlight source which are arranged above the heat dissipation substrate, a light changing mechanism used for achieving conversion of a high beam light pattern and a low beam light pattern, and a light emitting lens used for emitting light. The light emitting lens comprises a first lens part used for emitting light of the floodlight source and a second lens part used for emitting light of the condensation light source. The floodlight source comprises a first LED and a first reflection cup, and the condensation light source comprises a second LED and a second reflection cup. The second reflection cup comprises a first reflection part and a second reflection part which are both ellipsoidal surfaces, the first reflection part and the second reflection part are both provided with a first focal point and a second focal point, and the second LED is located on the first focal points of the first reflection part and the second reflection part at the same time; the automobile lamp is further provided with a first reflection structure, and part of light, collected by the second reflection part, of the second LED is reflected by the first reflection structure and then emitted to the second lens part. The automobile lamp is flat in structure, high in lamplight collecting efficiency, high in automobile lamp brightness and good in lighting effect.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lighting, in particular to a vehicle lamp. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, car headlights have begun to develop towards a flat trend, which has also put forward higher requirements for the research and development of headlights, because the flat design means that the overall size of the headlight should be smaller, especially in the height direction. The size should be as small as possible, but the lighting effect of the headlight should not be significantly weakened due to the reduction of the structure. Therefore, it is necessary to seek a headlight with a flat structure but good lighting effect. Utility Model Content

[0003] Based on this, the utility model aims to overcome at least one defect of the prior art and provide a vehicle lamp with a flat structure, high light collection efficiency, high vehicle lamp brightness and good lighting effect.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A vehicle lamp comprises a heat dissipation substrate, a spotlight source and a floodlight source arranged above the heat dissipation substrate, a dimming mechanism for realizing the conversion of high and low beam light types, and a light-emitting lens for emitting light; the light-emitting lens comprises a first lens portion for emitting light from the floodlight source, and a second lens portion for emitting light from the spotlight source; the floodlight source comprises a first LED and a first reflective cup, and the spotlight source comprises a second LED and a second reflective cup; the second reflective cup comprises a first reflective portion and a second reflective portion, both of which are ellipsoidal surfaces, the first reflective portion and the second reflective portion both have a first focus and a second focus, and the second LED is simultaneously located on the first focus of the first reflective portion and the second reflective portion; the vehicle lamp is also provided with a reflective structure, and part of the light of the second LED collected by the second reflective portion is reflected by the first reflective structure and then emitted to the second lens portion.

[0006] Preferably, the second reflective portion is located at one side of the light outlet of the second reflective cup, and the ellipsoidal surface area of ​​the second reflective portion is smaller than the ellipsoidal surface area of ​​the first reflective portion.

[0007] Preferably, the first reflective structure is a structure coated with an optical reflective film or an optical reflective mirror.

[0008] Further preferably, the focal point of the second lens portion and the second focal point of the second reflection portion are substantially symmetrically arranged relative to the first reflection structure.

[0009] Preferably, the included angle between the mounting surface for mounting the second LED and the first reflective structure is 30° to 60°.

[0010] Preferably, the second reflective cup further includes a curved surface spliced ​​between the first reflective portion and the second reflective portion.

[0011] Preferably, in the height direction of the vehicle lamp, the height of the joint between the curved surface and the first reflecting portion is lower than the height of the joint between the curved surface and the second reflecting portion.

[0012] Preferably, in the width direction of the vehicle lamp, the width of the first reflecting portion is smaller than the width of the second reflecting portion.

[0013] Preferably, the area of ​​the second reflecting portion is 1 / 3 to 2 / 3 of the area of ​​the first reflecting portion.

[0014] Preferably, the first reflective cup includes a third reflective portion and a fourth reflective portion, both of which are ellipsoidal surfaces, the third reflective portion and the fourth reflective portion both have a first focus and a second focus, and the first LED is located at the first focus of the third reflective portion and the fourth reflective portion at the same time; the headlight is also provided with a second reflective structure, and part of the light of the first LED collected by the fourth reflective portion is reflected by the second reflective structure and then emitted to the first lens portion.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the second reflective cup includes a first reflective portion and a second reflective portion, and a first reflective structure for reflecting the light collected by the second reflective portion is provided. The second LED is located at the first focal points of the first reflective portion and the second reflective portion at the same time, so the first reflective portion can collect most of the light emitted by the second LED and emit it through the second lens portion, and the light emitted by the second LED that cannot be collected by the first reflective portion is collected by the second reflective portion and then reflected by the first reflective structure and emitted to the second lens portion, thereby fully collecting and utilizing the light of the second LED, with very little light loss, high brightness of the headlight, and good lighting effect; and both the spotlight light source and the floodlight light source are provided above the heat dissipation substrate, which can not only significantly reduce the height of the light-emitting lens and make the headlight structure flat, but also, compared with the method of providing the low beam and the high beam on the upper and lower sides of the heat dissipation substrate, the distance between the two light sources in the technical solution is longer, which is beneficial to the heat dissipation of the two light sources, and the entire headlight has a good heat dissipation effect and good light emission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a simplified structural diagram of the vehicle lamp of Example 1.

[0017] Figure 2 for Figure 1 Another perspective view of .

[0018] Figure 3 It is a schematic diagram of the structure of Example 1 and a schematic diagram of the light emission of the second LED.

[0019] Figure 4 Schematic diagram of light emission from the first LED in Example 1.

[0020] Figure 5 It is a schematic diagram of the structure of the second reflective cup.

[0021] Figure 6 Schematic diagram of the light-changing mechanism of Example 1.

[0022] Figure 7 The present invention is a schematic diagram of the structure and light emission of a vehicle lamp in the prior art.

[0023] Figure 8 For the second reflector Figure 7 A simulation diagram of the optical effect of the low beam mode with a medium structure, that is, the second reflective cup is a conventional ellipsoidal cup structure.

[0024] Fig. 9 This is a simulation diagram of the optical effect of the low beam mode of Example 1, that is, the second reflective cup includes a first reflective portion and a second reflective portion.

[0025] Fig.10 For the second reflector Figure 7 A simulation diagram of the optical effect of the high beam mode with a medium structure, that is, the second reflective cup is a conventional ellipsoidal cup structure.

[0026] Fig.11 This is a simulation diagram of the optical effect of the high beam mode of Example 1, that is, the second reflective cup includes a first reflective portion and a second reflective portion.

[0027] Description of reference numerals:

[0028] 1. Heat dissipation substrate; 2. Focusing light source; 3. Floodlight source; 4. Dimming mechanism; 5. Light output lens; 6. First reflection structure; 21. Second reflection cup; 22. Second LED; 31. First reflection cup; 32. First LED; 51. First lens portion; 52. Second lens portion; 211. First reflection portion; 212. Second reflection portion; 213. Curved surface. DETAILED DESCRIPTION

[0029] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0030] like Figure 7As shown, the existing vehicle lamp on the market includes: a heat dissipation substrate 1, a focusing light source 2 arranged above the heat dissipation substrate 1, the focusing light source 2 includes a second LED 22 and a second reflective cup 21, the second reflective cup 21 is a conventional ellipsoid cup structure, the collection efficiency of the second reflective cup 21 for the second LED 22 is generally only about 80%, and about 20% of the light will be directly emitted from the cup mouth of the second reflective cup 21 (such as Figure 7 The elliptical area in the middle of the image is shown), which causes a waste of light and leads to poor lighting effect. In view of this, embodiments 1 and 2 provide new technical solutions.

[0031] Example 1

[0032] like Figures 1 to 6 As shown, embodiment 1 provides a vehicle lamp, comprising a heat dissipation substrate 1, a spotlight source 2 and a floodlight source 3 arranged above the heat dissipation substrate 1, a dimming mechanism 4 for realizing the conversion of high and low beam light types, and a light-emitting lens 5 for emitting light; the light-emitting lens 5 comprises a first lens portion 51 for emitting light from the floodlight source 3, and a second lens portion 52 for emitting light from the spotlight source 2; the floodlight source 3 comprises a first LED 32 and a first reflective cup 31, and the spotlight source 2 comprises a second LED 22 and a second reflective cup 21; the second reflective cup 21 comprises a first reflective portion 211 and a second reflective portion 212, both of which are ellipsoidal surfaces, the first reflective portion 211 and the second reflective portion 212 both have a first focus and a second focus, and the second LED 22 is simultaneously located at the first focus of the first reflective portion 211 and the second reflective portion 212; the vehicle lamp is also provided with a first reflective structure 6, and part of the light of the second LED 22 collected by the second reflective portion 212 is reflected by the first reflective structure 6 and emitted to the second lens portion 52.

[0033] In Example 1, the first reflective cup 31 is a conventional ellipsoidal cup structure currently available on the market.

[0034] In this embodiment, the spotlight light source refers to a light source with a narrow light irradiation range and relatively concentrated light, and the floodlight light source refers to a light source with a wide light irradiation range. The second reflective cup 21 includes a first reflective portion 211 and a second reflective portion 212, and is provided with a first reflective structure 6 for reflecting the light collected by the second reflective portion 212. The second LED 22 is located at the first focal points of the first reflective portion 211 and the second reflective portion 212 at the same time, so that the first reflective portion 211 can collect most of the light emitted by the second LED 22 and emit it through the second lens portion 52. The light emitted by the second LED 22 that cannot be collected by the first reflective portion 211 is collected by the second reflective portion 212 and then reflected by the first reflective structure 6 and emitted to the second lens portion 52 and emitted, thereby fully collecting and utilizing the light of the second LED 22, with very little light loss, high brightness of the headlight, and good lighting effect. Moreover, the condensing light source 2 and the floodlight light source 3 are both arranged above the heat dissipation substrate 1, which can not only significantly reduce the height of the light emitting lens and make the headlight structure flat, but also, compared with the method of arranging the low beam and the high beam on the upper and lower sides of the heat dissipation substrate, the interval between the two light sources in this embodiment is longer, which is conducive to the heat dissipation of the two light sources, and the whole headlight has a good heat dissipation effect and good light extraction efficiency.

[0035] The second reflective portion 212 is located at one side of the light outlet of the second reflective cup 21, and the ellipsoidal surface area of ​​the second reflective portion 212 is smaller than the ellipsoidal surface area of ​​the first reflective portion 211. Most of the light of the second LED 22 is collected by the first reflective portion 211, and a small amount of light not collected by the first reflective portion 211 is collected by the second reflective portion 212. This arrangement allows the second reflective cup 21 to fully collect light without taking up too much space, and the vehicle lamp structure is compact.

[0036] In addition, the first reflective structure 6 is a structure coated with an optical reflective film or an optical reflector, and can also be other structures with mirror reflection function, as long as it can achieve efficient reflection of light. In this embodiment, the first reflective structure 6 is an optical reflector, which can be specifically mirror aluminum.

[0037] The focal point of the second lens portion 52 and the second focal point of the second reflective portion 212 are substantially symmetrically arranged relative to the first reflective structure 6. Figure 3 As shown, the second focus of the second reflective portion 212 is point F. When the focus and the focus of the second lens portion 52 are arranged substantially symmetrically relative to the first reflective structure 6, the light that should originally converge to point F converges to the vicinity of the focus of the second lens portion 52 under the reflection effect of the first reflective structure 6, so that it can be emitted through the second lens portion 52 to form spotlight illumination, significantly improving the central brightness. The substantially symmetrical arrangement relative to the first reflective structure 6 mentioned in the present application means that the distance between the position of the focus F of the second reflective portion 212 after the mirror effect of the first reflective structure 6 and the focus of the second lens portion 52 is less than 5 mm.

[0038] In this embodiment, the included angle between the mounting surface for mounting the second LED 22 and the first reflective structure 6 is 30° to 60°.

[0039] Among them, Figure 5 As shown, the second reflective cup 21 further includes a curved surface 213 spliced ​​between the first reflective portion 211 and the second reflective portion 212 .

[0040] In this embodiment, the first reflective portion 211, the second reflective portion 212, and the curved surface 213 are an integrated structure; this not only improves the design accuracy, but also simplifies the installation process.

[0041] In addition, in the height direction of the headlight, the height of the joint between the curved surface 213 and the first reflective portion 211 is lower than the height of the joint between the curved surface 213 and the second reflective portion 212. In the width direction of the headlight, the width of the first reflective portion 211 is smaller than the width of the second reflective portion 212. This arrangement can make the light collection surface and light collection space of the second reflective cup 21 larger, which is conducive to the full collection of light. Figure 3 The vertical direction in the figure is the height direction of the vehicle lamp. The second LED 22 is installed above the heat dissipation substrate 1, which is defined as the upper and lower sides of the vehicle lamp height direction. Figure 3 The horizontal direction is the length direction of the headlight, and the direction perpendicular to the height direction and the length direction is the width direction of the headlight.

[0042] The area of ​​the second reflective portion 211 is 1 / 3 to 2 / 3 of the area of ​​the first reflective portion 212. Such a design can maximize the collection efficiency of the second LED 22.

[0043] In this embodiment, when the light-changing mechanism 4 is located in the light path, it can cut the light and realize the low beam function; when the light-changing mechanism 4 is moved out of the light path, it realizes the high beam function. The light-changing mechanism 4 in this embodiment is a solenoid valve driven light-cutting plate structure, that is, a structure that drives the light-cutting plate 41 to move or flip through the solenoid valve. Figure 7 As shown, the light cutting plate 41 is a double-bow structure.

[0044] Furthermore, the vehicle lamp also includes a cooling fan (not shown in the figure).

[0045] This embodiment performs optical simulation on the vehicle lamp, and specifically sets the parameters as follows: the light-emitting surface of the second LED 22 is Φ1.7 mm, and the luminous flux is about 1200 lm; the light-emitting surface of the first LED 32 is 5.1*3.1 mm, and the luminous flux is 5000 lm, the curved surface reflectivity of the first reflective cup 31 and the second reflective cup 21 is 0.86, and the transmittance of the light-emitting lens 5 is 0.94.

[0046] In the low beam mode (when the light-changing mechanism 4 partially blocks the light), the optical effect obtained by simulating the scheme of Example 1 is as follows: Fig. 9 When the second reflective cup 21 is a conventional ellipsoidal cup structure, the optical effect simulation diagram in the low beam mode is as follows: Figure 8 As shown. Figure 8 and Fig. 9 It can be seen that under the same parameter conditions, when the second reflector cup with a conventional ellipsoid cup structure is used, the central light intensity of the low beam is 138000cd, while the central light intensity of the headlight described in this embodiment 1 is 167000cd, which is increased by about 21%. It can be seen that the use of the second reflector cup 21 described in this application can significantly improve the low beam lighting effect and high brightness.

[0047] When the light-changing mechanism 4 moves out of the light path, the high-beam mode is realized. The optical effect diagram obtained by simulating the scheme of Embodiment 1 is as follows: Fig.11 As shown, the central light intensity is 185000cd; when the second reflector is a conventional ellipsoidal cup structure, the optical effect simulation diagram in the high beam mode is as follows Fig.10 As shown, the central light intensity is 148000cd; the light intensity is increased by about 25%.

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is that the structure of the floodlight source 3 is different, and the first reflective cup 31 in the floodlight source 3 in Example 2 also adopts a structural design similar to that of the second reflective cup 21 in Example 1.

[0050] Specifically, the first reflective cup 31 includes a third reflective portion and a fourth reflective portion, both of which are ellipsoidal surfaces, the third reflective portion and the fourth reflective portion both have a first focus and a second focus, and the first LED 32 is located at the first focus of the third reflective portion and the fourth reflective portion at the same time; the headlight is also provided with a second reflective structure, and part of the light of the first LED collected by the fourth reflective portion is reflected by the second reflective structure and then emitted to the first lens portion 51.

[0051] In this embodiment, the third reflecting portion can collect most of the light emitted by the first LED 32 and emit it through the first lens portion 51. The light emitted by the first LED 32 that cannot be collected by the third reflecting portion is collected by the fourth reflecting portion and then reflected by the second reflecting structure and emitted to the first lens portion 51, thereby fully collecting and utilizing the light of the first LED 32. Compared with Example 1, Example 2 can further improve the lighting effect.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A vehicle lamp, comprising a heat dissipation substrate, a spotlight source and a floodlight source arranged above the heat dissipation substrate, a dimming mechanism for realizing the conversion of high and low beam light types, and a light-emitting lens for emitting light; the light-emitting lens comprises a first lens portion for emitting light from the floodlight source, and a second lens portion for emitting light from the spotlight source; the floodlight source comprises a first LED and a first reflector, and the spotlight source comprises a second LED and a second reflector; characterized in that: The second reflective cup includes a first reflective portion and a second reflective portion, both of which are ellipsoidal surfaces, the first reflective portion and the second reflective portion both have a first focus and a second focus, and the second LED is located at the first focus of the first reflective portion and the second reflective portion at the same time; the headlight is also provided with a first reflective structure, and part of the light of the second LED collected by the second reflective portion is reflected by the first reflective structure and then emitted to the second lens portion.

2. A vehicle lamp according to claim 1, characterized in that: The second reflecting portion is located at one side of the light outlet of the second reflecting cup, and the ellipsoidal surface area of ​​the second reflecting portion is smaller than the ellipsoidal surface area of ​​the first reflecting portion.

3. The vehicle lamp according to claim 1, characterized in that: The first reflective structure is a structure coated with an optical reflective film or an optical reflective mirror.

4. A vehicle lamp according to claim 3, characterized in that: The focal point of the second lens portion and the second focal point of the second reflection portion are substantially symmetrically arranged relative to the first reflection structure.

5. The vehicle lamp according to claim 3, characterized in that: The included angle between the mounting surface for mounting the second LED and the first reflective structure is 30° to 60°.

6. The vehicle lamp according to claim 1, characterized in that: The second reflective cup further includes a curved surface spliced ​​between the first reflective portion and the second reflective portion.

7. The vehicle lamp according to claim 6, characterized in that: In the height direction of the vehicle lamp, the height of the joint surface between the curved surface and the first reflecting portion is lower than the height of the joint surface between the curved surface and the second reflecting portion.

8. The vehicle lamp according to claim 1, characterized in that: In the width direction of the vehicle lamp, the width of the first reflecting portion is smaller than the width of the second reflecting portion.

9. A vehicle lamp according to any one of claims 1 to 8, characterized in that: The area of ​​the second reflecting portion is 1 / 3 to 2 / 3 of the area of ​​the first reflecting portion.

10. The vehicle lamp according to claim 1, characterized in that: The first reflective cup includes a third reflective portion and a fourth reflective portion, both of which are ellipsoidal surfaces, the third reflective portion and the fourth reflective portion both have a first focus and a second focus, and the first LED is located at the first focus of the third reflective portion and the fourth reflective portion at the same time; the car lamp is also provided with a second reflective structure, and part of the light of the first LED collected by the fourth reflective portion is reflected by the second reflective structure and then emitted to the first lens portion.

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