Automotive LED light source and automotive lighting module

Abstract

The invention discloses a vehicle LED light source and a vehicle illumination module, and relates to the technical field of vehicle lamps, in the vehicle LED light source, a fluorescent layer covers a plurality of LED chips, so that light emitted by the LED chips can enter the fluorescent layer, the light is subjected to wavelength conversion by the fluorescent layer and then emits white light, and the surface, deviating from the plurality of LED chips, of the fluorescent layer is the light-emitting surface of the vehicle LED light source; in the vehicle LED light source, the reflecting layer at least surrounds the fluorescent layer, the reflecting layer not only reflects the light emitted by the LED chip to the outside of the fluorescent layer to the fluorescent layer so as to improve the optical efficiency, but also limits and divides the light-emitting surface, so that the light-emitting surface of the vehicle LED light source can be in the shape of a target light shape, and the light-emitting efficiency of the vehicle LED light source is improved. Therefore, the target light shape can be formed only by zooming the automotive LED light source according to the light shape emitted by the light-emitting surface of the automotive LED light source by the optical system subsequently, so that the automotive illumination module is high in optical efficiency, simple in structure and low in cost.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle lamps, and in particular to a vehicle LED light source and a vehicle lighting module. Background Art

[0002] With the advancement of semiconductor technology for lighting, light emitting diodes (LEDs) have become one of the mainstream choices for automotive light sources. However, due to the limitations of traditional LED chip cutting technology, the shape of LED light sources is mostly rectangular. Existing automotive LED light sources are mostly single LED chip rectangular light sources, or rectangular light sources composed of multiple LED chips. The projected light shape is also rectangular, while the lighting shape required by vehicles is basically non-rectangular and irregular. Therefore, complex optical design is required to change the light shape distribution of automotive LED light sources to form the target lighting shape, which not only reduces the optical efficiency of the system, but also makes the system structure complex and increases the cost. Summary of the invention

[0003] In order to solve the above technical problems, the embodiments of the present application provide a vehicle LED light source and a vehicle lighting module, so that the light-emitting surface of the vehicle LED light source is designed to be in the shape of a target light shape. Subsequently, the optical system only needs to scale the vehicle LED light source according to the light shape emitted by its light-emitting surface to form the target light shape, so that the vehicle lighting module has high optical efficiency, simple structure, and low cost.

[0004] To achieve the above objectives, the present application provides the following technical solutions:

[0005] A vehicle LED light source, comprising:

[0006] substrate;

[0007] A plurality of LED chips, wherein the LED chips are electrically disposed on the substrate;

[0008] A fluorescent layer, the fluorescent layer covers the plurality of LED chips, the fluorescent layer is used to convert the wavelength of light emitted by the LED chips, and the surface of the fluorescent layer away from the plurality of LED chips is the light-emitting surface of the automotive LED light source;

[0009] A reflective layer, wherein the reflective layer at least surrounds the fluorescent layer, and is used to reflect the light emitted by the LED chip and directed outside the fluorescent layer toward the fluorescent layer.

[0010] Optionally, the fluorescent layer is integrally formed, the reflective layer surrounds the fluorescent layer, and the light-emitting surface is a continuous, integral light-emitting surface.

[0011] Optionally, the light emitting surface includes a first side and a second side extending along a first direction and arranged opposite to each other along a second direction, and a third side and a fourth side extending along the second direction and arranged opposite to each other along the first direction, the first direction and the second direction intersect, and the first direction and the second direction are parallel to the plane where the substrate is located;

[0012] The second side includes a first sub-side and a second sub-side connected in sequence along the first direction, and the first sub-side and the second sub-side form a step at a connection point between the first sub-side and the second sub-side;

[0013] Alternatively, the second side includes a third sub-side, a fourth sub-side and a fifth sub-side sequentially connected along the first direction, the third sub-side and the fourth sub-side form a step at their connection, and the fourth sub-side and the fifth sub-side form a step at their connection.

[0014] Optionally, the light-emitting surface is an isosceles trapezoid as a whole.

[0015] Optionally, the light-emitting surface includes a first light-emitting area and a second light-emitting area, the reflective layer surrounds the first light-emitting area, and the reflective layer surrounds the second light-emitting area;

[0016] The first light-emitting area and the second light-emitting area extend along a first direction, the first light-emitting area is located on one side of the second light-emitting area along a second direction, the first direction intersects with the second direction, and the first direction and the second direction are parallel to the plane where the substrate is located.

[0017] Optionally, the light-emitting surface is rectangular as a whole;

[0018] The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, the first sub-light-emitting areas are rectangular, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer surrounds each of the first sub-light-emitting areas.

[0019] Optionally, the light-emitting surface is in an isosceles trapezoid as a whole, the first light-emitting area is in an isosceles trapezoid as a whole, and the second light-emitting area is in an isosceles trapezoid as a whole;

[0020] The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, some of the first sub-light-emitting areas are rectangular, some of the first sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer also surrounds each of the first sub-light-emitting areas;

[0021] The second light-emitting area includes a plurality of second sub-light-emitting areas arranged along the first direction, some of the second sub-light-emitting areas are rectangular, some of the second sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the second sub-light-emitting areas covers at least one LED chip, and the reflective layer also surrounds each of the second sub-light-emitting areas.

[0022] Optionally, the light-emitting surface is in a convex shape as a whole;

[0023] An edge of the first light-emitting area toward the second light-emitting area has a step protruding toward the second light-emitting area, and an edge of the second light-emitting area toward the first light-emitting area has a step protruding toward the first light-emitting area.

[0024] Optionally, the first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer further surrounds each of the first sub-light-emitting areas.

[0025] Optionally, the light-emitting surface is in a convex shape as a whole, the first light-emitting area is in a rectangular shape as a whole, and the second light-emitting area is in a rectangular shape as a whole;

[0026] The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, the first sub-light-emitting areas are rectangular, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer surrounds each of the first sub-light-emitting areas;

[0027] The light-emitting surface further includes a third light-emitting area located on a side of the first light-emitting area away from the second light-emitting area, and the third light-emitting area is rectangular in shape as a whole;

[0028] The third light-emitting area includes a plurality of third sub-light-emitting areas arranged along the first direction, some of the third sub-light-emitting areas are rectangular, some of the third sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the third sub-light-emitting areas covers at least one LED chip, and the reflective layer also surrounds each of the third sub-light-emitting areas.

[0029] Optionally, the light brightness of each LED chip can be independently controlled.

[0030] Optionally, the plurality of LED chips include a first type of LED chip and a second type of LED chip, and the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip.

[0031] Optionally, the plurality of LED chips include rectangular LED chips and special-shaped LED chips, the light-emitting surface of the rectangular LED chip is rectangular, and the light-emitting surface of the special-shaped LED chip is non-rectangular.

[0032] A vehicle lighting module, comprising a light source and an optical system, wherein light emitted by the light source forms a target light shape after passing through the optical system;

[0033] The light source is any one of the above-mentioned automotive LED light sources.

[0034] Compared with the prior art, the above technical solution has the following advantages:

[0035] The automotive LED light source provided by the embodiment of the present application includes a substrate, a plurality of LED chips, a fluorescent layer and a reflective layer; wherein the plurality of LED chips are electrically arranged on the substrate, and the substrate can drive the LED chips to emit light; different from the one-to-one arrangement of the fluorescent layer and the LED chip in the existing automotive LED light source, in the automotive LED light source, the fluorescent layer covers the plurality of LED chips, so that the light emitted by the LED chip can also be incident on the fluorescent layer, and white light is emitted after the wavelength conversion by the fluorescent layer, and the surface of the fluorescent layer away from the plurality of LED chips is the light-emitting surface of the automotive LED light source; at the same time, in the automotive LED light source, the reflective layer at least surrounds the fluorescent layer, and the reflective layer can not only reflect the light emitted by the LED chip outside the fluorescent layer to the fluorescent layer to improve the optical efficiency, but also the reflective layer can also limit and divide the surface of the fluorescent layer (i.e., the light-emitting surface of the automotive LED light source), so that the light-emitting surface of the automotive LED light source can be in the shape of the target light shape, so that the optical system only needs to scale the automotive LED light source according to the light shape emitted by its light-emitting surface to form the target light shape, so that the automotive lighting module has high optical efficiency, simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the planar structure of an existing automotive LED light source;

[0038] Figure 2 It is a schematic diagram of the planar structure of another existing automotive LED light source;

[0039] Figure 3 It is a schematic diagram of the planar structure of another existing automotive LED light source;

[0040] Figure 4 A schematic diagram of the planar structure of a vehicle LED light source provided in an embodiment of the present application;

[0041] Figure 5 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0042] Figure 6 For a Figure 5 The schematic diagram of the light shape simulation formed by the automotive LED light source shown;

[0043] Figure 7 for Figure 5 A schematic diagram of a working mode of a vehicle LED light source is shown;

[0044] Figure 8 for Figure 5 Another working mode schematic diagram of the automotive LED light source is shown;

[0045] Fig. 9 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0046] Fig.10 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0047] Fig.11 for Fig.10 A schematic diagram of a working mode of a vehicle LED light source is shown;

[0048] Fig.12 for Fig.10 Another working mode schematic diagram of the automotive LED light source is shown;

[0049] Fig.13 for Fig.10 A schematic diagram of another working mode of the automotive LED light source is shown;

[0050] Fig.14 for Fig.10 A schematic diagram of another working mode of a vehicle LED light source is shown;

[0051] Fig.15 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0052] Fig.16 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0053] Fig.17 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0054] Fig.18 A schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application;

[0055] Fig.19 This is a schematic diagram of the planar structure of another automotive LED light source provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] The terms "first" and "second" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0058] Figure 1-Figure 3 The schematic diagrams of the planar structures of three existing automotive LED light sources are shown respectively, among which: Figure 1 For a single LED chip light source, a rectangular fluorescent layer is provided correspondingly; Figure 2 A light source including two LED chips, wherein a rectangular fluorescent layer is provided corresponding to each of the two LED chips; Figure 3 The light source includes three LED chips, and a rectangular fluorescent layer is provided corresponding to each of the three LED chips.

[0059] As described in the background technology section, due to the limitations of traditional LED chip cutting technology, the shape of LED light sources is mostly rectangular. Existing automotive LED light sources are mostly single LED chip rectangular light sources, or rectangular light sources composed of multiple LED chips. The projected light shape is also a rectangular light shape, while the lighting light shape required by the vehicle is basically a non-rectangular special-shaped light shape. Therefore, complex optical design is required to change the light shape distribution of the automotive LED light source to form a target lighting light shape. This not only reduces the optical efficiency of the system, but also complicates the system structure and increases the cost.

[0060] In view of this, the embodiment of the present application provides a vehicle LED light source, which includes a substrate, a plurality of LED chips 10, a fluorescent layer 20 and a reflective layer 30; wherein the plurality of LED chips are electrically arranged on the substrate, and the substrate can drive the LED chips to emit light; different from the one-to-one correspondence between the fluorescent layer and the LED chips in the existing vehicle LED light source, in the vehicle LED light source, the fluorescent layer covers the plurality of LED chips, so that the light emitted by the LED chips can also be incident on the fluorescent layer, and the wavelength is converted by the fluorescent layer and then white light is emitted, and the surface of the fluorescent layer away from the plurality of LED chips is the vehicle The light-emitting surface of the LED light source; at the same time, in the vehicle LED light source, the reflective layer at least surrounds the fluorescent layer, and the reflective layer can not only reflect the light emitted by the LED chip to the outside of the fluorescent layer to the fluorescent layer to improve the optical efficiency, but also the reflective layer can limit and divide the surface of the fluorescent layer (that is, the light-emitting surface of the vehicle LED light source), so that the light-emitting surface of the vehicle LED light source can be in the shape of a target light shape, so that the optical system only needs to scale the vehicle LED light source according to the light shape emitted by its light-emitting surface to form the target light shape, so that the vehicle lighting module has high optical efficiency, simple structure, and low cost.

[0061] In the embodiment of the present application, the fluorescent layer is located on the light-emitting side of the LED chip. The light emitted by the LED chip passes through the fluorescent layer, which has a special fluorescent powder component. The fluorescent layer can convert part of the received light into light of another wavelength, which is mixed with other unconverted light to emit white light.

[0062] Optionally, the light emitted by the LED chip may be blue light, and the fluorescent layer may include yellow fluorescent powder. The fluorescent layer receives the blue light emitted by the LED chip and converts part of the blue light into yellow light, and the yellow light is mixed with the unconverted blue light to emit white light.

[0063] In the embodiment of the present application, the height of the reflective layer can be slightly lower than the height of the fluorescent layer, so that the reflective layer can reflect the light emitted by the LED chip outside the fluorescent layer to the fluorescent layer, but this does not affect the reflective layer's ability to define and divide the surface of the fluorescent layer. The reflective layer can be a layer of high reflective material.

[0064] It should be noted that the focus of this application is that the fluorescent layer covers multiple LED chips, and the fluorescent layer is limited and divided by the reflective layer, so that the surface of the fluorescent layer away from the multiple LED chips constitutes a light-emitting surface, and by designing the shape of the light-emitting surface to be the shape of the target light shape, the optical system only needs to scale the automotive LED light source according to the light shape emitted by its light-emitting surface to form the target light shape, so that the automotive lighting module has high optical efficiency, simple structure, and low cost. Therefore, the following embodiments specifically explain how to design the surface of the fluorescent layer away from the multiple LED chips (i.e., the light-emitting surface) to be the shape of the target light shape, and how to arrange the multiple LED chips in the light-emitting surface.

[0065] In the present application, although the fluorescent layer 20 covers a plurality of LED chips 10, for ease of understanding, in each planar structural schematic diagram of the present application, the LED chip 10 is shown in the fluorescent layer 20, and the illustrated area of ​​the LED chip 10 is used to represent the relative size of the light-emitting surface of different types of LED chips 10, but it does not represent the actual size; the percentage value marked in the LED chip 10 represents the brightness of the light-emitting of different LED chips 10, where 100% is a reference value. It can be understood that the LED chip includes a first-type semiconductor layer, an active layer, and a second-type semiconductor layer stacked in sequence, and the light-emitting surface of the LED chip corresponds to the area of ​​its active layer, or in other words, the shape of the active layer in the LED chip is the shape of the light-emitting surface of the LED chip, and the area of ​​the active layer in the LED chip is the area of ​​the light-emitting surface of the LED chip, which is different from the surface of the fluorescent layer 20 away from the plurality of LED chips 10 (i.e., the light-emitting surface of the automotive LED light source).

[0066] Figure 4 and Figure 5 FIG. 1 shows a schematic diagram of the planar structure of two automotive LED light sources provided in the embodiments of the present application. Figure 4 and Figure 5 As shown, in some embodiments of the present application, the fluorescent layer 20 is integrally formed, and the reflective layer 30 surrounds the fluorescent layer 20, that is, the reflective layer 30 does not divide the inside of the fluorescent layer 20, so that the surface of the fluorescent layer 20 away from the multiple LED chips 10, that is, the light-emitting surface 21 is a continuous, integrated light-emitting surface.

[0067] like Figure 4 and Figure 5 As shown, the light-emitting surface 21 includes a first side A1 and a second side A2 extending along a first direction X and arranged oppositely along a second direction Y, and a third side A3 and a fourth side A4 extending along the second direction Y and arranged oppositely along the first direction X, the first direction X and the second direction Y intersect, and the first direction X and the second direction Y are parallel to the plane where the substrate is located; wherein the second side A2 includes a first sub-side A21 and a second sub-side A22 connected in sequence along the first direction X, and the first sub-side A21 and the second sub-side A22 form a step at the connection between the two. Optionally, the step between the first sub-side A21 and the second sub-side A22 can be a vertical step, such as Figure 4 As shown, it can also be an inclined step, such as Figure 5 shown.

[0068] Understandably, Figure 4 The automotive LED light source shown can be used to form a low beam light shape with a vertical cutoff line. Figure 5 The vehicle LED light source shown can be used to form a low-beam light shape with cut-off lines at inclined angles of 15°, 30°, 45°, and 60°. Figure 6 It shows a Figure 5 The schematic diagram of the simulated light shape formed by the automotive LED light source is shown, wherein the step between the first sub-side A21 and the second sub-side A22 is a 45° inclined step, and the cutoff line of the formed light shape has a 45° inclined step.

[0069] It is understandable that, due to the imaging effect of the optical lens, the shape of the light-emitting surface of the automotive LED light source is upside down and opposite to the light shape distribution formed by the light emitted by the automotive LED light source after passing through the optical lens, but the light shape distribution formed by the light emitted by the automotive LED light source after passing through the optical lens is equivalent to the shape of the light-emitting surface of the automotive LED light source. In this application, for the sake of ease of understanding, the shape of the light-emitting surface of the automotive LED light source is placed according to the orientation of the final emitted light shape.

[0070] refer to Figure 4 and Figure 5 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0071] refer to Figure 5 From the shapes of the LED chips 10, it can be seen that the plurality of LED chips 10 may include rectangular LED chips and special-shaped LED chips. The light-emitting surface of the rectangular LED chip is rectangular, and the light-emitting surface of the special-shaped LED chip is non-rectangular. In particular, Figure 5 As shown, a special-shaped LED chip can be arranged in the inclined step between the first sub-side A21 and the second sub-side A22. The light-emitting surface of the special-shaped LED chip can be trapezoidal, matching the shape of the inclined step between the first sub-side A21 and the second sub-side A22. In this way, the brightness and clarity of the formed low beam light shape near the inclined cut-off line can be improved.

[0072] Of course, in the present application, since the shape of the light-emitting surface 21 has been set to the shape of the target light shape, even if the plurality of LED chips are rectangular light-emitting surfaces, the target light shape can be formed considering that the light emitted by the LED chip is divergent and the light emitted by the LED chip forms the outgoing light after passing through the fluorescent layer. However, among the plurality of LED chips 10, the light-emitting area of ​​the first type of LED chip is set to be different from the light-emitting area of ​​the second type of LED chip, and rectangular LED chips and special-shaped LED chips are set, so that the target light shape formed can be optimized to meet different lighting needs.

[0073] It should be noted that, in this application, the number and arrangement of multiple LED chips are not limited, and the specific arrangement can be determined according to lighting requirements. Figure 4 and Figure 5 As shown, the plurality of LED chips can be arranged in two rows of LED chips, the light emitting area of ​​the LED chips in the upper row can be smaller, and the light emitting area of ​​the LED chips in the lower row can be larger.

[0074] refer to Figure 4 and Figure 5 The percentage value of each LED chip 10 in the LED chip 10 is, optionally, the brightness of each LED chip 10 can be independently controlled, specifically, the brightness of the LED chip 10 can be adjusted by adjusting the current of the LED chip 10 to meet different lighting requirements. Alternatively, the brightness of multiple LED chips 10 can also be controlled simultaneously, depending on the specific situation.

[0075] On the basis that the brightness of each LED chip 10 can be independently controlled, Figure 5 In the illustrated automotive LED light source, by adjusting the light luminance of some LED chips 10 , different adaptive front lighting system (AFS) lighting shapes can be achieved.

[0076] Optionally, to achieve the AFS E mode, the AFS E mode usually refers to the low beam lighting mode on highways. On highways, the road conditions are relatively good, such as Figure 7 As shown, an LED chip in the middle of the cut-off line step can be added (such as Figure 7 The luminous brightness of the LED chip is increased from 100% to 200%, making the central area of ​​the low beam light shape brighter and more concentrated, meeting the requirements of the AFS E mode.

[0077] Another option is to implement the AFS V mode, which is a lighting mode designed for urban road driving. Due to the complex road conditions in urban areas, narrow roads and a large number of traffic participants, a relatively wide light pattern is required to ensure that the driver can clearly see the road and traffic signs ahead while driving, and to avoid additional glare to oncoming drivers or other road users, such as Figure 8 As shown, by lowering the upper right LED chip (such as Figure 8 The brightness of the LED chips on the left and right sides (as shown in the dotted circle) is increased. Figure 8 The luminous brightness of the dotted circle meets the AFS V mode.

[0078] Fig. 9FIG. 1 shows a schematic diagram of a planar structure of another vehicle LED light source provided in an embodiment of the present application. Figure 5 , Figure 7 and Figure 8 The difference between the automotive LED light source shown is that Fig. 9 In the vehicle LED light source shown, the second side A2 includes a third sub-side A23, a fourth sub-side A24 and a fifth sub-side A25 which are sequentially connected along the first direction X. The third sub-side A23 and the fourth sub-side A24 form a step at the connection between them, and the fourth sub-side A24 and the fifth sub-side A25 form a step at the connection between them. In this way, Fig. 9 The automotive LED light source shown can be used to form a low-beam light shape with a cut-off line that sinks first and then rises. For other designs, refer to Figure 5 The automotive LED light source shown will not be described in detail.

[0079] Fig.10 FIG. 1 shows a schematic diagram of a planar structure of another automotive LED light source provided in an embodiment of the present application. Fig.10 As shown, in some embodiments of the present application, the surface of the fluorescent layer 20 away from the multiple LED chips, that is, the light-emitting surface 21, includes a first light-emitting area 211 and a second light-emitting area 212, and the reflective layer 30 surrounds the first light-emitting area 211, and the reflective layer 30 surrounds the second light-emitting area 212. At this time, the fluorescent layer 20 is divided by the reflective layer 30, and the reflective layer 30 still surrounds all parts of the fluorescent layer 20. Although the light-emitting surface 21 is not a continuous, integral light-emitting surface, different light-emitting areas of the light-emitting surface 21 can be combined to form the shape of the target light shape.

[0080] like Fig.10 As shown, the first light emitting area 211 and the second light emitting area 212 extend along the first direction X, the first light emitting area 211 is located on one side of the second light emitting area 212 along the second direction Y, the first direction X and the second direction Y intersect, and the first direction X and the second direction Y are parallel to the plane where the substrate is located.

[0081] And, if Fig.10 As shown, the light-emitting surface 21 is rectangular as a whole, and the first light-emitting area 211 includes a plurality of first sub-light-emitting areas 21A arranged along the first direction X. The first sub-light-emitting areas 21A are rectangular, and each first sub-light-emitting area 21A covers at least one LED chip 10. The reflective layer 30 also surrounds each first sub-light-emitting area 21A. Optionally, the areas of each first sub-light-emitting area 21A in the first light-emitting area 211 may be the same; alternatively, the areas of at least two first sub-light-emitting areas 21A in the first light-emitting area 211 may be different, for example, Fig.10 As shown, the areas of the first sub-light-emitting regions 21A on both sides of the first light-emitting region 211 along the first direction X are relatively large, and the area of ​​the first sub-light-emitting region 21A in the middle region is relatively small.

[0082] refer to Fig.10 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0083] refer to Fig.10 From the shapes of the LED chips 10, it can be seen that the plurality of LED chips 10 can be rectangular LED chips.

[0084] refer to Fig.10 The percentage value in each LED chip 10, optionally, the luminous brightness of each LED chip 10 can be independently controlled. Specifically, the luminous brightness of the LED chip 10 can be adjusted by adjusting the current of the LED chip 10 to meet different lighting needs. Furthermore, the lighting and extinguishing of each light-emitting area can also be independently controlled.

[0085] On this basis, Fig.10 The vehicle LED light source shown can realize the dynamic cornering function of AFS and can distinguish between left and right steering. We know that the function of AFS also includes the dynamic cornering function. The principle of the dynamic cornering function is that according to the information such as the vehicle's driving speed and steering angle, the system can automatically adjust the vehicle's suspension height, tilt angle or lighting direction to reduce the impact of centrifugal force on vehicle stability and improve the vehicle's controllability and safety in the curve. At the same time, it is necessary to consider the difference between left-hand steering (i.e., the steering wheel is on the left side of the vehicle) and right-hand steering (i.e., the steering wheel is on the right side of the vehicle). Specifically, the dynamic cornering function of AFS can be realized by controlling the lighting and extinguishing of the LED chips 10 in each first sub-light-emitting area 21A in the first light-emitting area 211.

[0086] For example, first Fig.11 As shown, the LED chips 10 in several first sub-light-emitting areas 21A on the left side of the first direction X in the first light-emitting area 211 are controlled to be extinguished, and the LED chips 10 in several first sub-light-emitting areas 21A on the right side of the first direction X are lit, so that the low beam light shape in the left-hand driving situation can be realized; in the left-hand driving situation, as the dynamic curve turns right, as shown Fig.12 As shown, the LED chips 10 in the first sub-light-emitting area 21A on the right side near the middle can be further extinguished along the first direction X, so that the low beam light pattern is more concentrated on the right side, realizing the dynamic curve right turn function under left-hand drive conditions.

[0087] For example, first Fig.13As shown, the LED chips 10 in several first sub-light-emitting areas 21A on the right side of the first direction X in the first light-emitting area 211 are controlled to be extinguished, and the LED chips 10 in several first sub-light-emitting areas 21A on the left side of the first direction X are lit, so that the low beam light shape in the right-hand driving situation can be realized; in the right-hand driving situation, as the dynamic curve turns right, as shown Fig.14 As shown, the LED chips 10 in the first sub-light-emitting area 21A on the left side can be further extinguished along the first direction X, so that the low beam light pattern is more concentrated on the left side, realizing the dynamic curve left turn function under right-hand drive conditions.

[0088] Fig.15 FIG. 1 shows a schematic diagram of a planar structure of another automotive LED light source provided in an embodiment of the present application. Fig.15 As shown, in some embodiments of the present application, the fluorescent layer 20 is integrally formed, and the reflective layer 30 surrounds the fluorescent layer 20, that is, the reflective layer 30 does not divide the inside of the fluorescent layer 20, so that the surface of the fluorescent layer 20 away from the multiple LED chips 10, that is, the light-emitting surface 21 is a continuous, integral light-emitting surface, and the light-emitting surface 21 is an isosceles trapezoid as a whole, so that the high beam light shape can be achieved.

[0089] refer to Fig.15 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0090] refer to Fig.15 From the shapes of the LED chips 10, it can be seen that the plurality of LED chips 10 can be rectangular LED chips.

[0091] refer to Fig.15 The percentage value in each LED chip 10, optionally, the luminous brightness of each LED chip 10 can be independently controlled. Specifically, the luminous brightness of the LED chip 10 can be adjusted by adjusting the current of the LED chip 10 to meet different lighting needs. Furthermore, the lighting and extinguishing of each light-emitting area can also be independently controlled.

[0092] Fig.16 FIG. 1 shows a schematic diagram of a planar structure of another automotive LED light source provided in an embodiment of the present application. Fig.16As shown, in some embodiments of the present application, the surface of the fluorescent layer 20 away from the multiple LED chips, that is, the light-emitting surface 21, includes a first light-emitting area 211 and a second light-emitting area 212, and the reflective layer 30 surrounds the first light-emitting area 211, and the reflective layer 30 surrounds the second light-emitting area 212. At this time, the fluorescent layer 20 is divided by the reflective layer 30, and the reflective layer 30 still surrounds all parts of the fluorescent layer 20. Although the light-emitting surface 21 is not a continuous, integral light-emitting surface, different light-emitting areas of the light-emitting surface 21 can be combined to form the shape of the target light shape.

[0093] like Fig.16 As shown, the first light emitting area 211 and the second light emitting area 212 extend along the first direction X, the first light emitting area 211 is located on one side of the second light emitting area 212 along the second direction Y, the first direction X and the second direction Y intersect, and the first direction X and the second direction Y are parallel to the plane where the substrate is located.

[0094] And, if Fig.16 As shown, the light-emitting surface 21 is in an isosceles trapezoid as a whole, the first light-emitting area 211 is in an isosceles trapezoid as a whole, and the second light-emitting area 212 is in an isosceles trapezoid as a whole;

[0095] The first light-emitting area 211 includes a plurality of first sub-light-emitting areas 21A arranged along the first direction X, some of the first sub-light-emitting areas 21A are rectangular, and some of the first sub-light-emitting areas 21A are right-angled triangles or right-angled trapezoids. Each first sub-light-emitting area 21A covers at least one LED chip 10, and the reflective layer 30 also surrounds each first sub-light-emitting area 21A.

[0096] The second light-emitting area 212 includes a plurality of second sub-light-emitting areas 21B arranged along the first direction X, some of the second sub-light-emitting areas 21B are rectangular, some of the second sub-light-emitting areas 21B are right-angled triangles or right-angled trapezoids, each second sub-light-emitting area 21B covers at least one LED chip 10, and the reflective layer 30 also surrounds each second sub-light-emitting area 21B.

[0097] refer to Fig.16 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0098] refer to Fig.16The percentage value in each LED chip 10, optionally, the luminous brightness of each LED chip 10 can be independently controlled. Specifically, the luminous brightness of the LED chip 10 can be adjusted by adjusting the current of the LED chip 10 to meet different lighting needs. Furthermore, the lighting and extinguishing of each light-emitting area can also be independently controlled.

[0099] On this basis, Fig.16 The automotive LED light source shown in the figure can realize the Adaptive Driving Beam (ADB) function. The ADB system uses advanced sensor technology, such as the forward-looking active safety camera, to capture road information in real time, including vehicles, pedestrians, traffic signs, etc. Based on this information, the system can automatically adjust the brightness, projection angle and shape of the light to adapt to various complex driving environments. For example, when the system detects that another vehicle is approaching, it will quickly adjust the headlights. Fig.16 In the illustrated automotive LED light source, the LED chips 10 in part of the first sub-light-emitting area 21A in the first light-emitting area 211 can be independently controlled to be extinguished, thereby adjusting the emitted light shape to prevent the light from directly hitting the driver's eyes, reducing glare, and improving driving safety.

[0100] Fig.17 FIG. 1 shows a schematic diagram of a planar structure of another automotive LED light source provided in an embodiment of the present application. Fig.17 As shown, in some embodiments of the present application, the surface of the fluorescent layer 20 away from the multiple LED chips, that is, the light-emitting surface 21, includes a first light-emitting area 211 and a second light-emitting area 212, and the reflective layer 30 surrounds the first light-emitting area 211, and the reflective layer 30 surrounds the second light-emitting area 212. At this time, the fluorescent layer 20 is divided by the reflective layer 30, and the reflective layer 30 still surrounds all parts of the fluorescent layer 20. Although the light-emitting surface 21 is not a continuous, integral light-emitting surface, different light-emitting areas of the light-emitting surface 21 can be combined to form the shape of the target light shape.

[0101] like Fig.17 As shown, the first light emitting area 211 and the second light emitting area 212 extend along the first direction X, the first light emitting area 211 is located on one side of the second light emitting area 212 along the second direction Y, the first direction X and the second direction Y intersect, and the first direction X and the second direction Y are parallel to the plane where the substrate is located.

[0102] And, if Fig.17 As shown, the light-emitting surface 21 is convex-shaped as a whole; the edge of the first light-emitting area 211 toward the second light-emitting area 212 has a step protruding toward the second light-emitting area 212, and the edge of the second light-emitting area 212 toward the first light-emitting area 211 has a step protruding toward the first light-emitting area 211.

[0103] So set up, Fig.17The automotive LED light source shown can realize low beam light when each LED chip 10 in the first light-emitting area 211 is lit and each LED chip 10 in the second light-emitting area 212 is off; and can realize high beam light when each LED chip 10 in the first light-emitting area 211 and each LED chip 10 in the second light-emitting area 212 are both lit.

[0104] Fig.18 FIG. 1 shows a schematic diagram of a planar structure of another vehicle LED light source provided in an embodiment of the present application. Fig.17 The difference between the automotive LED light sources shown is that Fig.18 In the illustrated automotive LED light source, the first light-emitting area 211 includes a plurality of first sub-light-emitting areas 21A arranged along the first direction X, each of the first sub-light-emitting areas 21A covers at least one LED chip 10, and the reflective layer 30 also surrounds each of the first sub-light-emitting areas 21A. Fig.16 The automotive LED light source shown is similar, Fig.18 In the automotive LED light source shown, since the first light-emitting area 211 includes a plurality of first sub-light-emitting areas 21A arranged along the first direction X, and each first sub-light-emitting area 21A covers at least one LED chip 10, the LED chips 10 in some of the first sub-light-emitting areas 21A in the first light-emitting area 211 can be independently controlled to light up, and the LED chips 10 in some of the first sub-light-emitting areas 21A can be extinguished, so as to realize the high beam ADB function.

[0105] refer to Fig.17 and Fig.18 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0106] refer to Fig.17 and Fig.18 From the shapes of the LED chips 10, it can be seen that the plurality of LED chips 10 may include rectangular LED chips and special-shaped LED chips. The light-emitting surface of the rectangular LED chip is rectangular, and the light-emitting surface of the special-shaped LED chip is non-rectangular. In particular, Fig.17 and Fig.18 As shown, a special-shaped LED chip can be arranged in the inclined step of the edge of the second light-emitting area 212 toward the first light-emitting area 211, and a special-shaped LED chip can also be arranged in the inclined step of the edge of the first light-emitting area 211 toward the second light-emitting area 212. The light-emitting surface of the special-shaped LED chip can be trapezoidal to match the shape of the inclined step. In this way, the brightness and clarity of the low beam light shape formed near the inclined cut-off line can be improved.

[0107] Fig.19 FIG. 1 shows a schematic diagram of a planar structure of another automotive LED light source provided in an embodiment of the present application. Fig.19 As shown, in some embodiments of the present application, the surface of the fluorescent layer 20 away from the multiple LED chips, that is, the light-emitting surface 21, includes a first light-emitting area 211 and a second light-emitting area 212, and the reflective layer 30 surrounds the first light-emitting area 211, and the reflective layer 30 surrounds the second light-emitting area 212. At this time, the fluorescent layer 20 is divided by the reflective layer 30, and the reflective layer 30 still surrounds all parts of the fluorescent layer 20. Although the light-emitting surface 21 is not a continuous, integral light-emitting surface, different light-emitting areas of the light-emitting surface 21 can be combined to form the shape of the target light shape.

[0108] like Fig.19 As shown, the first light emitting area 211 and the second light emitting area 212 extend along the first direction X, the first light emitting area 211 is located on one side of the second light emitting area 212 along the second direction Y, the first direction X and the second direction Y intersect, and the first direction X and the second direction Y are parallel to the plane where the substrate is located.

[0109] And, if Fig.19 As shown, the light-emitting surface 21 is in a convex shape as a whole, the first light-emitting area 211 is in a rectangular shape as a whole, and the second light-emitting area 212 is in a rectangular shape as a whole;

[0110] The first light-emitting area 211 includes a plurality of first sub-light-emitting areas 21A arranged along the first direction X. The first sub-light-emitting areas 21A are rectangular. Each first sub-light-emitting area 21A covers at least one LED chip 10. The reflective layer 30 also surrounds each first sub-light-emitting area 21A.

[0111] The light-emitting surface 21 further includes a third light-emitting area 213 located on a side of the first light-emitting area 211 away from the second light-emitting area 212, and the third light-emitting area 213 is rectangular in shape as a whole;

[0112] The third light-emitting area 213 includes a plurality of third sub-light-emitting areas 21C arranged along the first direction X, some of the third sub-light-emitting areas 21C are rectangular, some of the third sub-light-emitting areas 21C are right-angled triangles or right-angled trapezoids, each third sub-light-emitting area 21C covers at least one LED chip 10, and the reflective layer 30 also surrounds each third sub-light-emitting area 21C.

[0113] Combination Fig.10 , Fig.18 as well as Fig.19 As you can see, Fig.19As shown in the automotive LED light source, the second light-emitting area 212 combined with part of the first sub-light-emitting area 21A in the first light-emitting area 211 can realize the low beam light shape, and can realize the dynamic bending function of AFS, and the second light-emitting area 212, the first light-emitting area 211 and the third light-emitting area 213 can realize the high beam light shape, and the second light-emitting area 212, the first light-emitting area 211 and part of the third sub-light-emitting area 21C in the third light-emitting area 213 can also realize the high beam ADB function, integrating multiple lighting functions.

[0114] refer to Fig.19 From the relative sizes of the LED chips 10, it can be seen that the multiple LED chips 10 may include a first type of LED chip and a second type of LED chip, the light-emitting area of ​​the first type of LED chip is different from the light-emitting area of ​​the second type of LED chip, and under the same current drive, the brightness of the LED chip with a smaller light-emitting area can be higher to meet different lighting needs.

[0115] refer to Fig.19 From the shapes of the LED chips 10, it can be seen that the plurality of LED chips 10 can be rectangular LED chips.

[0116] refer to Fig.19 The percentage value in each LED chip 10, optionally, the luminous brightness of each LED chip 10 can be independently controlled. Specifically, the luminous brightness of the LED chip 10 can be adjusted by adjusting the current of the LED chip 10 to meet different lighting needs. Furthermore, the lighting and extinguishing of each light-emitting area can also be independently controlled.

[0117] It should be noted that in the present application, the brightness of each LED chip 10 can be independently controlled. However, considering that some LED chips 10 may be turned on and off at the same time, for example Fig.19 The LED chips 10 located in the second light emitting area 212 are controlled so that the LED chips 10 can be controlled to light up and turn off at the same time.

[0118] Based on the same inventive concept, the embodiment of the present application also provides a vehicle lighting module, which includes a light source and an optical system, and the light emitted by the light source forms a target light shape after passing through the optical system. The light source is a vehicle LED light source provided by any of the above embodiments. Since the vehicle LED light source has been described in detail in the above embodiments, it will not be repeated here.

[0119] The various parts in this manual are described in a combination of parallel and progressive manners. Each part focuses on the differences from other parts, and the same or similar parts between the various parts can be referenced to each other.

[0120] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle LED light source, characterized in that: The vehicle LED light source comprises: substrate; A plurality of LED chips, wherein the LED chips are electrically disposed on the substrate; A fluorescent layer, the fluorescent layer covers the plurality of LED chips, the fluorescent layer is used to convert the wavelength of light emitted by the LED chips, and the surface of the fluorescent layer away from the plurality of LED chips is the light-emitting surface of the automotive LED light source; A reflective layer, wherein the reflective layer at least surrounds the fluorescent layer, and is used to reflect the light emitted by the LED chip and directed outside the fluorescent layer toward the fluorescent layer.

2. The automotive LED light source according to claim 1, characterized in that: The fluorescent layer is integrally formed, the reflective layer surrounds the fluorescent layer, and the light-emitting surface is a continuous, integral light-emitting surface.

3. The automotive LED light source according to claim 2, characterized in that: The light-emitting surface includes a first side and a second side extending along a first direction and arranged opposite to each other along a second direction, and a third side and a fourth side extending along the second direction and arranged opposite to each other along the first direction, the first direction and the second direction intersect, and the first direction and the second direction are parallel to the plane where the substrate is located; The second side includes a first sub-side and a second sub-side connected in sequence along the first direction, and the first sub-side and the second sub-side form a step at a connection point between the first sub-side and the second sub-side; Alternatively, the second side includes a third sub-side, a fourth sub-side and a fifth sub-side sequentially connected along the first direction, the third sub-side and the fourth sub-side form a step at their connection, and the fourth sub-side and the fifth sub-side form a step at their connection.

4. The automotive LED light source according to claim 2, characterized in that: The light emitting surface is in an isosceles trapezoid as a whole.

5. The automotive LED light source according to claim 1, characterized in that: The light-emitting surface includes a first light-emitting area and a second light-emitting area, the reflective layer surrounds the first light-emitting area, and the reflective layer surrounds the second light-emitting area; The first light-emitting area and the second light-emitting area extend along a first direction, the first light-emitting area is located on one side of the second light-emitting area along a second direction, the first direction intersects with the second direction, and the first direction and the second direction are parallel to the plane where the substrate is located.

6. The automotive LED light source according to claim 5, characterized in that: The light-emitting surface is rectangular in shape as a whole; The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, the first sub-light-emitting areas are rectangular, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer surrounds each of the first sub-light-emitting areas.

7. The vehicle LED light source according to claim 5, characterized in that: The light-emitting surface is in an isosceles trapezoid as a whole, the first light-emitting area is in an isosceles trapezoid as a whole, and the second light-emitting area is in an isosceles trapezoid as a whole; The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, some of the first sub-light-emitting areas are rectangular, some of the first sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer also surrounds each of the first sub-light-emitting areas; The second light-emitting area includes a plurality of second sub-light-emitting areas arranged along the first direction, some of the second sub-light-emitting areas are rectangular, some of the second sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the second sub-light-emitting areas covers at least one LED chip, and the reflective layer also surrounds each of the second sub-light-emitting areas.

8. The automotive LED light source according to claim 5, characterized in that: The light-emitting surface is in a convex shape as a whole; An edge of the first light-emitting area toward the second light-emitting area has a step protruding toward the second light-emitting area, and an edge of the second light-emitting area toward the first light-emitting area has a step protruding toward the first light-emitting area.

9. The vehicle LED light source according to claim 8, characterized in that: The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer further surrounds each of the first sub-light-emitting areas.

10. The vehicle LED light source according to claim 5, characterized in that: The light-emitting surface is in a convex shape as a whole, the first light-emitting area is in a rectangular shape as a whole, and the second light-emitting area is in a rectangular shape as a whole; The first light-emitting area includes a plurality of first sub-light-emitting areas arranged along the first direction, the first sub-light-emitting areas are rectangular, each of the first sub-light-emitting areas covers at least one of the LED chips, and the reflective layer surrounds each of the first sub-light-emitting areas; The light-emitting surface further includes a third light-emitting area located on a side of the first light-emitting area away from the second light-emitting area, and the third light-emitting area is rectangular in shape as a whole; The third light-emitting area includes a plurality of third sub-light-emitting areas arranged along the first direction, some of the third sub-light-emitting areas are rectangular, some of the third sub-light-emitting areas are right-angled triangles or right-angled trapezoids, each of the third sub-light-emitting areas covers at least one LED chip, and the reflective layer also surrounds each of the third sub-light-emitting areas.

11. The vehicle LED light source according to any one of claims 1 to 10, characterized in that: The light emitting brightness of each LED chip can be independently controlled.

12. The vehicle LED light source according to claim 11, characterized in that: The plurality of LED chips include a first type of LED chips and a second type of LED chips, and the light emitting area of ​​the first type of LED chips is different from the light emitting area of ​​the second type of LED chips.

13. The vehicle LED light source according to claim 11, characterized in that: The plurality of LED chips include rectangular LED chips and special-shaped LED chips. The light-emitting surface of the rectangular LED chip is rectangular, and the light-emitting surface of the special-shaped LED chip is non-rectangular.

14. A vehicle lighting module, characterized in that: The vehicle lighting module comprises a light source and an optical system, and the light emitted by the light source forms a target light shape after passing through the optical system; The light source is the vehicle LED light source according to any one of claims 1-13.

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