Optical unit with common virtual focus and for functional multiplexing and vehicle headlamp
By adopting a common virtual focal point optical unit design in the headlight, the light-emitting chip is placed near the optical axis of the optical unit, so that the light converges at the same virtual focal point, which solves the problems of light color uniformity and space utilization, and improves the lighting uniformity and space efficiency of the headlight.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU XINGYU AUTOMOTIVE LIGHTING SYST CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-07
AI Technical Summary
In existing solutions for reusing vehicle headlight functions, it is difficult to balance the uniformity of light color, and dark areas are prone to appear when a certain light color is lit, resulting in insufficient space utilization.
The optical unit adopts a common virtual focal point design, with the light-emitting chip set on or near the optical axis of the optical unit. The virtual focal points of each optical unit coincide, and the light converges at the same virtual focal point, ensuring that the light color does not de-focus. The uniform coverage of the light is achieved through alternating refractive surfaces.
It improves the illumination uniformity of the optical unit, reduces space occupation, avoids dark areas, and optimizes the overall structural design of the optical unit.
Smart Images
Figure CN224470128U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive lighting technology, and in particular to an optical unit and automotive lighting that share a virtual focal point and is suitable for multiplexing functions. Background Technology
[0002] In the field of multi-functional automotive lighting, several different types of optical solutions currently exist. Firstly, some solutions select the center of one light source or a point between two light sources as the focal point, using optical units (such as lenses or mirrors). This inevitably results in at least one light color being off-center, making it difficult to balance the uniformity of the two light colors. Secondly, some solutions place the two light sources on opposite sides of the optical axis, with one light color corresponding to one optical system. The advantage of this type of solution is that neither light color is out of focus, but it is disadvantageous in terms of space. Furthermore, some multi-functional solutions suffer from the following problem: when one light color is lit, it cannot cover the area covered by the other light color, resulting in large dark areas when illuminated in monochromatic mode. Utility Model Content
[0003] In order to solve the technical problems existing in the prior art, this utility model provides an optical unit and vehicle lamp with a common virtual focal point that is suitable for multiple functions, which can ensure that different light colors do not defocus while not occupying too much space.
[0004] The technical solution adopted by this utility model to solve its technical problem is: an optical unit with a common virtual focal point and suitable for functional multiplexing, comprising: a light source and a refractive part, wherein the light source comprises at least two light-emitting chips, the refractive part comprises at least two optical units, the number of light-emitting chips is the same as the number of optical units, each light-emitting chip is disposed on or near the optical axis of a corresponding optical unit, each optical unit has a virtual focal point, the virtual focal points of all optical units coincide at point F, the light emitted by each light-emitting chip is refracted by the optical unit corresponding to the light-emitting chip and then emitted, and the backward extension of the refracted light converges at the virtual focal point F.
[0005] The specific technical effects are as follows: each light-emitting chip is set on or near the optical axis of its corresponding optical unit to ensure that there is no light color defocusing, and the virtual focal points of all optical units are set to coincide, which can improve the uniformity of illumination and is beneficial to the spatial size, avoiding the overall structure of the optical unit from being too large and occupying too much space. Furthermore, with the solution of this patent, when one light color is lit, it can occupy the illumination area of another light color, improving the uniformity of single light color illumination and weakening the dark areas.
[0006] Furthermore, there are two optical units, namely a first optical unit and a second optical unit, and two light-emitting chips, namely a first light-emitting chip and a second light-emitting chip. The light-emitting center of the first light-emitting chip is located on or near the optical axis of the first optical unit, and the light-emitting center of the second light-emitting chip is located on or near the optical axis of the second optical unit.
[0007] Furthermore, the first optical unit includes a plurality of first refractive surfaces, and the second optical unit includes a plurality of second refractive surfaces, with the first and second refractive surfaces alternately arranged.
[0008] Furthermore, the light emitted by the first light-emitting chip converges at the virtual focal point F after the backward extensions of the refracted light rays refracted by each of the first refractive surfaces, and the light emitted by the second light-emitting chip converges at the virtual focal point F after the backward extensions of the refracted light rays refracted by each of the second refractive surfaces.
[0009] Furthermore, the focal lengths of the multiple first refractive surfaces are the same, and the focal lengths of the multiple second refractive surfaces are the same.
[0010] Furthermore, the focal lengths of the multiple first refractive surfaces are different from each other, and the focal lengths of the multiple second refractive surfaces are also different from each other.
[0011] Furthermore, the focal lengths of the first optical unit and the second optical unit may be the same or different.
[0012] Furthermore, the optical unit with a common virtual focal point and suitable for multiplexing functions also includes a light-emitting refraction unit, which is disposed in the light-emitting direction of the refraction part, and the focal point of the light-emitting refraction unit coincides with the virtual focal point F.
[0013] Furthermore, the light colors of each light-emitting chip are different, and the light source is a multi-core light source or multiple single-core light sources.
[0014] An automotive lamp, comprising an optical unit with a common virtual focal point and suitable for functional multiplexing as described in any of the preceding claims.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention ensures that there is no light color defocus by setting each light-emitting chip on or near the optical axis of its corresponding optical unit, and the virtual focal points of all optical units are set to coincide, which can improve the uniformity of illumination and is beneficial to the spatial size, avoiding the overall structure of the optical unit from being too large and occupying too much space. Furthermore, by adopting the solution of this patent, when one light color is lit, it can occupy the illumination area of another light color, improving the uniformity of single light color illumination and weakening the dark areas. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a schematic diagram of the structure of an optical unit embodiment 1 of the present invention, which has a common virtual focal point and is suitable for functional multiplexing.
[0019] Figure 2 for Figure 1 A diagram illustrating the principle of light rays in a horizontal plane.
[0020] Figure 3 This is a schematic diagram of the structure of an optical unit embodiment 2 of the present invention, which has a common virtual focal point and is suitable for functional multiplexing.
[0021] In the figure: 1. Refraction section; 2. First light-emitting chip; 3. Second light-emitting chip; 4. Light-emitting refraction unit; 11. First optical unit; 12. Second optical unit. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] like Figures 1 to 2 The image shows a preferred embodiment of the present invention, which is an optical unit with a common virtual focal point and suitable for multiplexing functions. The unit includes a light source and a refractive section 1. The light source includes two light-emitting chips, namely a first light-emitting chip 2 and a second light-emitting chip 3. The refractive section 1 includes two optical units, namely a first optical unit 11 and a second optical unit 12. Each light-emitting chip is disposed on or near the optical axis of its corresponding optical unit (it should be noted that "near the optical axis" means that the light-emitting chip can be half on the optical axis or slightly off the optical axis). Specifically, the light-emitting center of the first light-emitting chip 2 is located at the origin of the coordinate system of the first optical unit 11, and the light-emitting center of the second light-emitting chip 3 is located at the origin of the coordinate system of the second optical unit 12. Each optical unit has a virtual focal point. The virtual focal points of the first optical unit 11 and the second optical unit 12 coincide at point F. The light emitted by each light-emitting chip is refracted by the optical unit corresponding to that chip and then emitted. The backward extensions of the refracted light converge at point F. Therefore, each light-emitting chip is set on or near the optical axis of its corresponding optical unit to ensure that there is no light color defocusing. The virtual focal points of all optical units are set to coincide, which can improve the uniformity of illumination and is beneficial to the spatial size. It avoids the overall structure of the optical unit being too large and occupying too much space. Furthermore, with the solution of this patent, when one light color is lit, it can occupy the illumination area of another light color, which improves the uniformity of illumination of a single light color and weakens the dark areas.
[0026] In a preferred embodiment, the first optical unit 11 includes a plurality of first refractive surfaces, and the second optical unit 12 includes a plurality of second refractive surfaces. The first and second refractive surfaces are alternately spliced together in the horizontal direction. The light emitted by the first light-emitting chip 2 converges at the virtual focal point F after the backward extension of the refracted light rays refracted by each first refractive surface. The light emitted by the second light-emitting chip 3 converges at the virtual focal point F after the backward extension of the refracted light rays refracted by each second refractive surface. Specifically, the plurality of first refractive surfaces are divided into left and right parts, and the plurality of second refractive surfaces are also divided into left and right parts. The first refractive surfaces in the left part are all located above the second refractive surfaces, and the first refractive surfaces in the right part are all located below the second refractive surfaces. The first refractive surfaces in the left part and the second refractive surfaces in the left part form the left optical unit, and the first refractive surfaces in the right part and the second refractive surfaces in the right part form the right optical unit. The left optical unit and the right optical unit are symmetrically arranged.
[0027] In a preferred embodiment, the focal lengths of the plurality of first refractive surfaces are the same, and the focal lengths of the plurality of second refractive surfaces are the same.
[0028] In a preferred embodiment, the focal lengths of the first optical unit 11 and the second optical unit 12 are the same.
[0029] In a preferred embodiment, the light colors of each light-emitting chip are different, and the light source is a multi-core light source or multiple single-core light sources.
[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.
[0031] Based on the above, this utility model also has the following embodiments:
[0032] Example 2:
[0033] like Figure 3 As shown,
[0034] The difference from Embodiment 1 is that the optical unit with a common virtual focal point and suitable for multiplexing functions also includes a light-emitting refraction unit 4. The light-emitting refraction unit 4 is disposed in the light-emitting direction of the refraction part 1, and the focal point of the light-emitting refraction unit 4 coincides with the virtual focal point F. Adding the light-emitting refraction unit 4 can ensure that light rays of different colors can eventually be emitted as parallel light, which is very beneficial for the subsequent processing of light and also helps to improve uniformity.
[0035] Example 3:
[0036] The difference from Embodiment 1 is that the focal lengths of the multiple first refractive surfaces are different, and to improve the lighting effect, the focal length of the first refractive surface that deviates from the optical axis of the first optical unit can be shortened. Similarly, the focal lengths of the multiple second refractive surfaces are different, and to improve the lighting effect, the focal length of the second refractive surface that deviates from the optical axis of the second optical unit can be shortened. The advantage of this embodiment is that although there are steps between the optical surfaces corresponding to different focal lengths, which may produce stray light, the uniformity of individual light colors in the horizontal direction is better, thus improving the lighting uniformity of the entire optical system.
[0037] Example 4:
[0038] The difference from Embodiment 1 is that the focal lengths of the first optical unit 11 and the second optical unit 12 are different.
[0039] Example 5: A vehicle lamp, comprising an optical unit with a common virtual focal point as described in any of the above embodiments and suitable for functional multiplexing.
[0040] Compared with the prior art, the beneficial effects of this utility model are:
[0041] This invention ensures that the light output of a single color can cover the area illuminated by another color by placing each light-emitting chip on or near the optical axis of its corresponding optical unit. This improves the uniformity of illumination and is beneficial to the spatial dimensions, avoiding the overall structure of the optical unit from being too large and taking up too much space.
[0042] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.
Claims
1. An optical unit with a common virtual focal point and suitable for functional multiplexing, characterized in that, include: Light source and refraction part (1), The light source includes at least two light-emitting chips. The refractive part (1) includes at least two optical units. The number of light-emitting chips is the same as the number of optical units. Each light-emitting chip is disposed near the optical axis of the optical unit corresponding to it. Each optical unit has a virtual focal point. The virtual focal points of all optical units coincide at point F. The light emitted by each light-emitting chip is refracted by the optical unit corresponding to the light-emitting chip and then emitted. The backward extension of the refracted light converges at the virtual focal point F.
2. The optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 1, characterized in that, There are two optical units, namely the first optical unit (11) and the second optical unit (12), and two light-emitting chips, namely the first light-emitting chip (2) and the second light-emitting chip (3). The light-emitting center of the first light-emitting chip (2) is located on or near the optical axis of the first optical unit (11), and the light-emitting center of the second light-emitting chip (3) is located on or near the optical axis of the second optical unit (12).
3. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 2, characterized in that, The first optical unit (11) includes a plurality of first refractive surfaces, and the second optical unit (12) includes a plurality of second refractive surfaces, with the first and second refractive surfaces alternately arranged.
4. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 3, characterized in that, The light emitted by the first light-emitting chip (2) converges at the virtual focal point F after the backward extensions of the refracted light rays refracted by each of the first refractive surfaces. The light emitted by the second light-emitting chip (3) converges at the virtual focal point F after the backward extensions of the refracted light rays refracted by each of the second refractive surfaces.
5. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 3, characterized in that, The focal lengths of the multiple first refractive surfaces are the same, and the focal lengths of the multiple second refractive surfaces are the same.
6. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 3, characterized in that, The focal lengths of the multiple first refractive surfaces are different from each other, and the focal lengths of the multiple second refractive surfaces are different from each other.
7. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 2, characterized in that, The focal lengths of the first optical unit (11) and the second optical unit (12) are the same or different.
8. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 1, characterized in that, The optical unit with a common virtual focal point and suitable for multiplexing functions further includes a light-emitting refraction unit (4), which is disposed in the light-emitting direction of the refraction part (1), and the focal point of the light-emitting refraction unit (4) coincides with the virtual focal point F.
9. An optical unit with a common virtual focal point and suitable for functional multiplexing as described in claim 1, characterized in that, Each light-emitting chip emits a different color, and the light source is a multi-core light source or multiple single-core light sources.
10. A vehicle light, characterized in that, It includes an optical unit with a common virtual focal point as described in any one of claims 1 to 9, and suitable for functional multiplexing.