Low-beam structure for realizing large-angle projection, vehicle lamp and vehicle
By setting an auxiliary refractive unit on the side of the lens main body of the headlight, the two refractions of light are achieved, the problem of light loss in traditional headlight design is solved, the light width of the close-range irradiation area is improved, and a larger angle is achieved. Projection effect.
Patent Information
- Application Number
- CN202420172912.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-24
AI Technical Summary
When traditional car light design achieves larger angle projection, some light is totally reflected on the lens surface, resulting in light loss, and it is impossible to project a wider low-light irradiation area, especially at close range, the left and right widths of the irradiation area are insufficient.
A low-ray structure including a lens main body and an auxiliary refractive unit is designed. The auxiliary refractive unit is arranged on the side of the lens main body, and the irradiation angle of the light is expanded by refraction twice, thereby increasing the irradiation width within the low-ray irradiation range.
Through the design of the auxiliary refractive unit, the lost light can be effectively reused, and the projection at a larger angle can be achieved, which improves the light width of the close-range illumination area.
Smart Images
Figure CN222210027U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical elements, and in particular to a low beam structure for realizing large-angle projection. In addition, it also relates to a vehicle lamp and a vehicle. Background Art
[0002] As the demand for the width of the light pattern of automobile headlights increases day by day, the design of traditional headlights is limited by its principles. For example, in order to achieve a wider angle of projection, when a beam of light is incident on the edge of the lens at a certain angle, part of the light will be totally reflected on the lens surface, resulting in light loss. Therefore, for the low beam illumination area of the headlight, it is impossible to project a wider illumination area, and when irradiating at a close distance, the left and right widths of the illumination area formed are not enough.
[0003] In view of this, in order to reuse the lost light, it is urgent to design a low beam structure for achieving large-angle projection to solve the above problem. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art.
[0005] To this end, the utility model provides a low beam structure for achieving large-angle projection, which can reuse lost light to achieve larger-angle projection.
[0006] According to the first aspect of the utility model, a low beam structure for achieving large-angle projection is provided, including a lens body and an auxiliary refraction unit, wherein the auxiliary refraction unit is arranged on the side of the lens body so as to be able to project part of the light to form an irradiation area and to expand the irradiation width of the irradiation area in the horizontal direction.
[0007] The beneficial effect of the utility model is that by arranging an auxiliary refraction unit on the side of the lens body, when the light enters the auxiliary refraction unit at a certain angle, after being refracted twice by the auxiliary refraction unit, the light can be emitted at a large angle. Therefore, within the low beam illumination range, the light emitted by the auxiliary refraction unit has a larger illumination width.
[0008] Preferably, the auxiliary refraction unit comprises a light input portion and a light output portion, and contour lines of the light input portion and the light output portion of the auxiliary refraction unit in a horizontal direction are straight lines or curves.
[0009] Further preferably, the contour line of the light incident portion is parallel to the horizontal direction.
[0010] Preferably, there is an inclination angle between the normal line of the light emitting portion and the optical axis, and the inclination angle is smaller than a critical angle of total reflection, and the critical angle of total reflection is arctan (1 / n), where n is the refractive index of the material.
[0011] Further preferably, the surface of the light incident portion of the auxiliary refraction unit is suitable for being provided with a microstructure or a pattern.
[0012] A second aspect of the utility model provides a vehicle lamp, which adopts the low beam structure for realizing large-angle projection described in the first aspect of the utility model.
[0013] The third aspect of the present invention provides a vehicle, which adopts the headlight described in the second aspect of the present invention. When the headlight illuminates at a projection angle other than ±40°, the projection angle corresponds to the illumination area within 10m in front of the vehicle, so as to increase the illumination width of the vehicle at a close distance through the low beam structure of the headlight.
[0014] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.
[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] Figure 1 This is a light path diagram of the low beam structure for realizing large-angle projection of the utility model.
[0018] Reference numerals:
[0019] 1. Lens body; 2. Auxiliary refraction unit; 21. Light entrance part; 22. Light exit part. DETAILED DESCRIPTION
[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0021] In the description of the present invention, it should be understood that the terms "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0022] See also Figure 1 A specific implementation of the utility model is a low beam structure for realizing large-angle projection, and the low beam structure includes a lens body 1 and an auxiliary refraction unit 2, wherein the auxiliary refraction unit 2 is arranged on the side of the lens body 1, and a part of the light is projected through the auxiliary refraction unit 2 to form an irradiation area, and the irradiation width of the irradiation area in the horizontal direction can be expanded, thereby improving the light effect.
[0023] Specifically, in order to achieve a larger angle of projection, when a beam of light enters the edge of the lens at a certain angle, part of the light will be totally reflected on the surface of the lens, resulting in light loss. Therefore, it is necessary to reuse this part of the light, so an auxiliary refraction unit 2 is added on one or both sides of the lens body 1, and the auxiliary refraction unit 2 includes a light input portion 21 and a light output portion 22. In the horizontal plane, the contour lines of the light input portion 21 and the light output portion 22 of the auxiliary refraction unit 2 are both straight lines, and the contour line of the light input portion 21 is arranged parallel to the horizontal direction. Therefore, when a beam of light enters the auxiliary refraction unit 2 at a certain angle, the light is first refracted by the light input portion 21 of the auxiliary refraction unit 2, and then the refracted light is emitted from the light output portion 22 of the auxiliary refraction unit 2, and a larger refraction angle is formed between the outgoing light emitted by the light output portion 22 and the incident light, so that the light can be emitted at a larger angle, thereby increasing the irradiation range and improving the light effect. Of course, the contour lines of the light input portion 21 and the light output portion 22 of the auxiliary refraction unit 2 can also be set as curves.
[0024] More specifically, there is an inclination angle between the normal line of the light emitting portion 22 and the optical axis, and the inclination angle is set to be smaller than the critical angle of total reflection, which is arctan (1 / n), where n is the refractive index of the material. It should be noted that the angle of the critical angle of total reflection changes according to the refractive index of the material used, and the specific angle needs to be determined according to the performance required by the customer and the material used.
[0025] In addition, a microstructure or pattern can be provided on the surface of the light incident portion 21 of the auxiliary refraction unit 2. When light passes through the microstructure or pattern on the surface of the light incident portion 21, the uniformity of this part of the light and the seamless superposition of the main light type can be achieved through the microstructure and pattern.
[0026] A vehicle lamp in a specific implementation manner of the utility model adopts the low beam structure for large-angle projection described in any of the above embodiments of the utility model, and therefore also has the above advantages.
[0027] A vehicle according to a specific implementation of the utility model adopts a headlight of the utility model. When the headlight illuminates at a projection angle other than ±40°, the illumination range corresponds to the illumination area within 10m in front of the vehicle. Since the headlight adopts the low beam structure described in any of the above embodiments, the headlight can effectively increase the illumination width of the vehicle at close range.
[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0029] The above description is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A low beam structure for achieving large-angle projection, characterized in that: The invention comprises a lens body (1) and an auxiliary refraction unit (2), wherein the auxiliary refraction unit (2) is arranged on the side of the lens body (1) so as to be able to project part of the light to form an irradiation area and to expand the irradiation width of the irradiation area in the horizontal direction; The auxiliary refractive unit (2) comprises a light input portion (21) and a light output portion (22); the contour lines of the light input portion (21) and the light output portion (22) of the auxiliary refractive unit (2) in the horizontal direction are straight lines or curves; and the contour line of the light input portion (21) is parallel to the horizontal direction.
2. The low beam structure for realizing large-angle projection according to claim 1, characterized in that: There is an inclination angle between the normal line of the light emitting portion (22) and the optical axis, and the inclination angle is smaller than the critical angle of total reflection, and the critical angle of total reflection is arctan (1 / n), where n is the refractive index of the material.
3. The low beam structure for realizing large-angle projection according to claim 1, characterized in that: The surface of the light incident portion (21) of the auxiliary refraction unit (2) is suitable for being provided with a microstructure or a pattern.
4. A vehicle lamp, characterized in that: The low beam structure for realizing large-angle projection as described in any one of claims 1 to 3 is adopted.
5. A vehicle, characterized in that: The headlight according to claim 4 is used. When the headlight irradiates at a projection angle other than ±40°, the irradiation range formed corresponds to the irradiation area within 10m in front of the vehicle, so as to increase the illumination width of the vehicle at close range.