Light source assembly and automobile lamp and automobile using same

Abstract

The invention discloses a light source assembly and an automobile lamp and an automobile using the light source assembly. The light source assembly comprises a plate-shaped base body, a light-emitting part arranged on the plate-shaped base body and arranged in a flat plate shape, and a fluorescent body arranged on the side, opposite to the plate-shaped base body, of the light-emitting part. The side end face, opposite to the light-emitting piece, of the phosphor is formed into a gradually-changing face with the thickness gradually changing from top to bottom. According to the light source assembly, the side end face, back on to the light-emitting part, of the fluorescent body is formed into the gradually-changing face with the gradually-changing thickness from top to bottom, so that a larger clear projection range is formed when the light source assembly is applied to an actual vehicle lamp use scene to conduct inclined projection relative to the ground.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to a light source assembly and a vehicle lamp and a vehicle using the same. Background Art

[0002] In traditional light source configurations, the light source and lens are generally perpendicular, and the projection plane is also perpendicular to the optical axis. During projection, the screen is also typically perpendicular to the optical axis, allowing for a clear image through focus adjustment. However, in automotive headlight projection applications, due to the large angle between the ground and the optical axis, image clarity is entirely determined by the lens' depth of field, which limits the clear projection range.

[0003] Based on the above situation, the existing technology, in order to achieve the effect of clear projection over a large area, usually adopts the technical solution of reducing the focal length and aperture of the headlight projection system, thereby increasing the depth of field and making the oblique projection clear over a larger range. After actual research, it was found that the above technical solution is not suitable for car headlight projection. Because car headlight projection requires high brightness, its aperture is large, resulting in a very small depth of field of the car headlight projection lens, which is inconsistent with the requirement of reducing the aperture of the above technical solution. In addition, the angle between the ground and the optical axis of the car headlight projection is extremely small, and the projection range can span several meters to tens of meters. Therefore, the clarity is guaranteed only within a very small range.

[0004] Therefore, in order to meet the demand for expanding the clear projection range of automobile headlight projection, the headlight structure used needs to be further optimized and improved so that the effect of expanding the clear projection range can be achieved without reducing the focal length and aperture of the headlight projection system. Summary of the Invention

[0005] The first object of the present invention is to provide a light source assembly to solve the technical problem of forming a larger clear projection range when performing oblique projection.

[0006] A second object of the present invention is to provide a vehicle lamp to solve the technical problem of forming a larger clear projection range when performing oblique projection.

[0007] The third object of the present invention is to provide a car to solve the technical problem of forming a larger clear projection range when the car lights used therein are used for tilted projection.

[0008] The light source assembly of the present invention is implemented as follows: A light source assembly comprises: a plate-shaped substrate, a light-emitting element arranged along a flat plate on the plate-shaped substrate, and a phosphor arranged on a side of the light-emitting element facing away from the plate-shaped substrate; The side end surface of the phosphor facing away from the light-emitting element is formed into a gradient surface with gradually decreasing thickness from top to bottom.

[0009] In an optional implementation of the present invention, the gradual surface is an inclined wedge surface.

[0010] In an optional embodiment of the present invention, the oblique wedge surface and the upper end portion of the side end surface of the phosphor facing away from the light-emitting element form an oblique wedge angle, and the oblique wedge angle ranges from 1° to 3°.

[0011] In an optional embodiment of the present invention, the gradient surface includes at least two stepped surfaces; and The cross section of each step surface along the height direction of the plate-shaped base is rectangular.

[0012] In an optional embodiment of the present invention, the surface area of ​​each step surface is the same or different.

[0013] In an optional implementation of the present invention, the phosphor is a fluorescent plate.

[0014] In an optional embodiment of the present invention, the phosphor is coated and molded on one end of the light-emitting element facing away from the plate-shaped substrate.

[0015] In an optional embodiment of the present invention, the light-emitting element includes a plurality of LED lamps distributed in an array and suitable for emitting blue light, and the blue light emitted by each LED lamp is suitable for exciting a phosphor to generate yellow light, and white light is formed by mixing the blue light and the yellow light.

[0016] The vehicle lamp of the present invention is achieved as follows: A vehicle lamp comprises: the light source assembly as described above, and a projection lens arranged on the light emitting side of the light source assembly; wherein The plate-shaped base of the light source assembly and the optical axis of the projection lens are perpendicular to each other; and The light emitted by the light emitting element forms a near-end projection through the portion with a small thickness of the phosphor, and the light emitted by the light emitting element forms a far-end projection through the portion with a large thickness of the phosphor.

[0017] Automobile of the present invention is achieved like this: An automobile comprises: a vehicle body and the headlight assembled on the vehicle body; The optical axis of the projection lens of the headlight is tilted relative to the ground; and The small thickness portion of the phosphor is located above the large thickness portion of the phosphor relative to the ground.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects: the light source assembly of the present invention and the headlight and automobile using the same, by forming the side end surface of the phosphor facing away from the light-emitting part into a gradient surface with gradually decreasing thickness from top to bottom, enables the light source assembly to form a larger clear projection range when used in actual headlight usage scenarios when making an oblique projection relative to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the optical path principle of the light source assembly of the present invention; Figure 2 This is a schematic structural diagram of the gradient surface of the phosphor of the light source assembly according to Example 2 of the present invention; Figure 3 This is a schematic structural diagram of the gradient surface of the phosphor of the light source assembly according to Example 3 of the present invention; Figure 4 The energy distribution diagram of the light source surface of the light source assembly of the present invention; Figure 5 This is a schematic diagram of the near-end projection and far-end lighting formed by the vehicle lamp of the present invention when applied to a car.

[0020] In the figure: a plate-shaped substrate 1, a light-emitting element 2, a fluorescent body 3, a projection lens 4, a projection range 5, a near-end projection K1, a far-end projection K2, an inclined wedge surface 61, a step surface 62, and a vehicle body 7. DETAILED DESCRIPTION

[0021] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0022] Example 1: See also Figures 1 to 3 As shown, this embodiment provides a light source assembly, comprising: a plate-shaped substrate 1, a light-emitting element 2 arranged along a flat plate on the plate-shaped substrate 1, and a phosphor 3 disposed on the side of the light-emitting element 2 facing away from the plate-shaped substrate 1. The side end surface of the phosphor 3 facing away from the light-emitting element 2 is formed into a gradient surface with gradually increasing thickness from top to bottom.

[0023] Based on the above structure, in a first optional implementation, the phosphor 3 is a phosphor plate. During the processing of this phosphor plate, a gradient surface is formed directly on the end face of the phosphor plate that faces away from the light-emitting element 2. This method is easy to process and allows for precise control of the structure of the entire gradient surface. For a phosphor plate employing this structure, the phosphor 3 can be fixed to the light source assembly by being detachably coupled to the plate-like substrate 1. In a second optional implementation, the phosphor 3 is directly coated and formed on the side end of the light-emitting element 2 that faces away from the plate-like substrate 1. For this operation method, the coating thickness is controlled during the coating process so that the thickness of the final formed phosphor 3 exhibits a gradient effect.

[0024] Furthermore, the light emitting element 2 of the present embodiment comprises a plurality of LED lamps adapted to emit blue light, which are arranged in an array, and each LED lamp is adapted to excite the phosphor 3 to generate yellow light, and the white light is formed by mixing the blue light and the yellow light. Here, according to the different mixing distances (here, the mixing distance is different because the overall thickness of the phosphor 3 is not uniform, and for the small thickness part of the phosphor 3, the mixing distance is short, and for the large thickness part of the phosphor 3, the mixing distance is long), the light spots of different clarity appear on the outer surface of the phosphor 3, as shown in FIG. 1, and on the upper side of the phosphor 3, the boundary of the LED lamp can still be clearly restored due to the short mixing distance, and after imaging and projection to the ground near the projection interaction can be clearer, and on the lower side of the phosphor layer (it should be noted that in the present embodiment, the upper side and the lower side are the azimuthal perspective relative to the ground when the light source assembly is applied to the specific car light use scenario and makes an inclined projection), the mixing distance is long, and the color temperature is low and the boundary is not sharp, and when illuminating, the soft boundary and warm tone illumination can be realized. Figure 4

[0025] In summary, for the light source assembly of the present embodiment, by forming the side end surface of the phosphor 3 away from the light emitting element 2 into a gradually thickening surface from top to bottom, a larger clear projection range 5 is formed when the light source assembly is applied to the actual car light use scenario and makes an inclined projection relative to the ground.

[0026] Embodiment 2 Please refer to Figure 1 and Figure 2 Based on the light source assembly of embodiment 1, the gradually thickening surface of the light source assembly of the present embodiment is a wedge surface 61.

[0027] Specifically, the wedge surface 61 of the present embodiment forms a wedge angle with the upper end of the side end surface of the phosphor 3 away from the light emitting element 2, and the range of the wedge angle is 1°-3°, and under this angle design, the light source assembly can maintain clarity at 3m to 50m when it is projected in the car light use scenario.

[0028] For the wedge surface 61 of the present embodiment, it is easy to process, and the inclination trend of the entire end surface is consistent, and in the use process, in combination with the specific car light application scenario, the way of expanding the depth of field is as shown in Figure 2 The image of the point 31 in the small thickness part of the phosphor 3 is located at the near position 51, and similarly, the point 32 in the large thickness part of the phosphor 3 will be imaged at the far position 52, and through the above way, the projection beyond 3m is kept clear.

[0029] Embodiment 3 Please refer to Figure 3 ​As shown, based on the light source assembly of Example 1, the gradient surface of the light source assembly provided in this embodiment includes at least two layers of stepped surfaces 62; each stepped surface 62 has a rectangular cross-section along the height direction of the plate-like substrate 1. This embodiment uses two layers of stepped surfaces 62 as an example, and in this case, the gradient surface can be divided into three parts, and these three parts gradually increase in size relative to the vertical thickness of the plate-like substrate 1.

[0030] Based on the above structure, it should be noted that the surface area of ​​each step surface 62 can be the same or different, which is not an absolute limitation in this embodiment.

[0031] In summary, for the light source assembly of this embodiment, since the gradient surface includes multiple parts with different vertical thicknesses relative to the plate-like base 1, the overall phosphor 3 has a structure that is narrow at the top and wide at the bottom relative to the ground, so that the light source assembly can form a larger clear projection range 5 when used in actual vehicle lighting usage scenarios when making an oblique projection relative to the ground.

[0032] Example 4: See also Figures 1 to 4 As shown, based on the vehicle lamp of Example 1, Example 2, or Example 3, this embodiment provides a vehicle lamp, comprising: the light source assembly of Example 1, Example 2, or Example 3, and a projection lens 4 disposed on the light-emitting side of the light source assembly. The projection lens 4 herein can optionally adopt any mature means in the prior art, and its specific structure and implementation principle will not be described in detail in this embodiment.

[0033] On the basis of the above situation, it should be noted that the plate-shaped base 1 of the light source assembly and the optical axis of the projection lens 4 are perpendicular to each other. The light emitted by the light-emitting component 2 forms a proximal projection K1 through the small thickness portion of the phosphor 3, which makes the crosstalk between the LED light beams smaller and achieves higher clarity; the light emitted by the light-emitting component 2 forms a distal projection K2 through the large thickness portion of the phosphor 3, which makes the crosstalk between the light beams emitted by the LED lamps form a softened boundary, avoiding the generation of sharp boundaries during illumination. Here, if the side end face of the phosphor 3 facing away from the light-emitting component 2 is a uniform flat end face, then after the blue light emitted by the light-emitting component 2 excites the phosphor 3 to form a mixed white light, due to the scattering and mixing of the fluorescence, there will no longer be a clear boundary between the LEDs, and adjacent LED lamps cannot be effectively distinguished during projection. The crosstalk between the light beams emitted by the LED lamps is large, which reduces the clarity of the projection.

[0034] Based on the above situation, at the near-end of the projection, LED pixels with clear boundaries are projected onto the ground, forming a clear interactive pattern. At the far-end of the projection, the LED light's own crosstalk softens the pixel edges, avoiding sharp boundaries during illumination and providing a better driver experience. Therefore, for the headlight of this embodiment, its clarity can be optimized during both near-end projection and far-end illumination.

[0035] Example 5: See also Figures 1 to 5 As shown, based on the headlight of Example 4, this embodiment provides a car, including: a vehicle body 7 and a headlight mounted on the vehicle body 7; the optical axis of the projection lens 4 of the headlight is tilted relative to the ground; and the small thickness portion of the phosphor 3 is located above the large thickness portion of the phosphor 3 relative to the ground.

[0036] The above specific embodiments further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0038] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A light source assembly, characterized in that: include: A plate-shaped substrate, a light-emitting element arranged along a flat plate on the plate-shaped substrate, and a phosphor provided on a side of the light-emitting element facing away from the plate-shaped substrate; The side end surface of the phosphor facing away from the light-emitting element is formed into a gradient surface with gradually decreasing thickness from top to bottom.

2. The light source assembly according to claim 1, wherein: The gradual surface is an inclined wedge surface.

3. The light source assembly according to claim 2, wherein: The oblique wedge surface and the upper end portion of the side end surface of the phosphor facing away from the light-emitting element form an oblique wedge angle, and the range of the oblique wedge angle is 1° to 3°.

4. The light source assembly according to claim 1, wherein: The gradient surface comprises at least two stepped surfaces; and The cross section of each step surface along the height direction of the plate-shaped base is rectangular.

5. The light source assembly according to claim 4, wherein: The surface area of ​​each step surface is the same or different.

6. The light source assembly according to any one of claims 1 to 5, characterized in that: The phosphor is a fluorescent plate.

7. The light source assembly according to any one of claims 1 to 5, characterized in that: The phosphor is coated and formed on one end of the light emitting component facing away from the plate-shaped base.

8. The light source assembly according to any one of claims 1 to 5, characterized in that: The light-emitting element includes a plurality of LED lamps distributed in an array and suitable for emitting blue light, and the blue light emitted by each LED lamp is suitable for exciting a phosphor to generate yellow light, and white light is formed by mixing the blue light and the yellow light.

9. A vehicle lamp, characterized in that: include: The light source assembly according to any one of claims 1 to 8, and a projection lens provided on the light output side of the light source assembly; in The plate-shaped base of the light source assembly and the optical axis of the projection lens are perpendicular to each other; and The light emitted by the light emitting element forms a near-end projection through the portion with a small thickness of the phosphor, and the light emitted by the light emitting element forms a far-end projection through the portion with a large thickness of the phosphor.

10. An automobile, characterized in that: include: A vehicle body and a vehicle lamp according to claim 9 mounted on the vehicle body; The optical axis of the projection lens of the headlight is tilted relative to the ground; and The small thickness portion of the phosphor is located above the large thickness portion of the phosphor relative to the ground.

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