Low beam III region forming module, design method of low beam III region forming module and vehicle lamp

Abstract

The invention relates to vehicle lamp illumination, and discloses a low beam III area forming module which comprises a light emitting unit, a collecting and reflecting element and a lens which are sequentially arranged along a light propagation path, a deflection structure is formed on the lower portion of an incident light reference surface of the lens, and a first included angle which is an acute angle is formed between an incident light surface of the deflection structure and the incident light reference surface; the collecting and reflecting element is configured to be capable of collecting and converging stray light rays generated when the light-emitting unit works and reflecting the stray light rays to the deflection structure, and the deflection structure is configured to be capable of receiving the stray light rays reflected by the collecting and reflecting element and projecting the stray light rays through the lens to form a low-beam III-area light type. According to the module, stray light of the light-emitting unit can be used for forming the low-beam III area, light used for forming a low-beam body light pattern does not need to be used, local non-uniformity of the low-beam body light pattern cannot be caused, and the road surface irradiation effect cannot be affected. In addition, the invention also relates to a method for designing the low-beam III-region forming module and a vehicle lamp provided with the low-beam III-region forming module.

Description

Technical Field

[0001] The present invention relates to vehicle lighting, in particular to a low beam III zone forming module. In addition, the present invention also relates to a method for designing the low beam III zone forming module and a vehicle lamp provided with the low beam III zone forming module. Background Art

[0002] According to the international definition of low beam, there are two important requirements for low beam. First, the low beam zone III is located above the light-dark cutoff line, and there must be no glare, with an upper limit requirement of illuminance not exceeding 0.7Lx. In addition, there are 8 test points near the cutoff line in the low beam zone III, with minimum illumination requirements, in order to illuminate the road signs above the road; second, the color of the low beam is required to be white, ensuring that the road surface can be illuminated even in bad weather, so that car owners can drive at night and make clear judgments on the current road section.

[0003] At present, the design scheme for low beam zone III on the market is basically to make a concave-convex pattern in the local area of ​​the light exit surface or the light entrance surface of the lens, and refract part of the light of the low beam main light pattern to the position where the low beam zone III is needed to be formed, so as to form the low beam zone III and meet the technical requirements of the regulations. Since the refracted light of the low beam zone III formed by this method is part of the light refracted from the low beam main light, this method will cause insufficient light to form the low beam main light pattern, resulting in uneven low beam main light pattern. When the low beam is swung left and right, the dark area formed by the lost light will be obviously felt, affecting the road illumination effect.

[0004] Therefore, in order to solve the above technical problems, it is necessary to design a new low beam zone III forming module. Summary of the invention

[0005] One of the purposes of the present invention is to provide a low beam zone III forming module, which can utilize the stray light of the light-emitting unit to form the low beam zone III, without utilizing the light used to form the low beam main light pattern, and will not cause local unevenness of the low beam main light pattern and will not affect the road surface illumination effect.

[0006] The second purpose of the present invention is to provide a method for designing a low beam zone III forming module. The low beam zone III forming module designed using this method can collect stray light generated by the light-emitting unit to form the low beam zone III, without using the light in the low beam main light pattern, and will not cause unevenness of the low beam main light pattern and will not affect the road surface illumination effect.

[0007] The third object of the present invention is to provide a headlight, in which the low beam zone III forming module can utilize the stray light of the light-emitting unit to form the low beam zone III, without utilizing the light in the low beam main light pattern, and will not cause unevenness of the low beam main light pattern and will not affect the road illumination effect.

[0008] In order to achieve the above-mentioned objectives, a first aspect of the present invention provides a low beam zone III forming module, comprising a light-emitting unit, a collecting and reflecting element, and a lens arranged in sequence along a light propagation path, a deflection structure is formed at the lower portion of the light incident reference plane, a first acute angle is formed between the light incident surface of the deflection structure and the light incident reference plane, the collecting and reflecting element is configured to collect and converge stray light generated when the light-emitting unit is working, and reflect the stray light toward the deflection structure, the deflection structure is configured to receive the stray light reflected by the collecting and reflecting element and project it through the lens to form a low beam zone III light pattern.

[0009] Preferably, the vertex of the first angle is located on the light incident reference plane and between the center of the light incident reference plane and the lower end point of the light incident reference plane, and the first angle is -15° to 10°.

[0010] Specifically, the deflection structure and the lens are an integrally formed part.

[0011] More specifically, the collecting reflective element is a parabolic reflective element, and the upper boundary of the parabolic reflective element is not higher than the upper boundary point of the light incident reference plane.

[0012] Preferably, it also includes a dispersion optimization structure, which is arranged on the light incident reference plane, and there is a second acute angle between the light incident plane of the dispersion optimization structure and the light incident reference plane, the vertex of the second angle is located on the light incident reference plane, and the distance between the vertex of the second angle and the center of the light incident reference plane in the vertical direction is -5mm to 5mm, and the angle of the second angle is -10° to 10°.

[0013] Specifically, the dispersion optimization structure, the lens, and the deflection structure are an integrally formed part.

[0014] Furthermore, the dispersion optimization structure and the deflection structure adopt a rounded transition.

[0015] The second aspect of the present invention further discloses a design method for a low beam zone III forming module, which is applied to and designed for the low beam zone III forming module. The design method for the low beam zone III forming module comprises:

[0016] A deflection structure is provided below the light incident reference plane of the lens, so that a first acute angle is formed between the light incident plane of the deflection structure and the light incident reference plane;

[0017] A collecting and reflecting element is established between the lens and the light-emitting unit, so that the collecting and reflecting element can receive stray light generated when the light-emitting unit is working, and reflect the stray light toward the deflection structure, so that a low beam zone III light pattern is formed through projection through the lens.

[0018] Preferably, the design method of arranging the deflection structure below the light incident reference plane is:

[0019] A rectangular coordinate system is established with the center of the incident light reference plane of the lens as the origin, wherein the x-axis is arranged along the up-down direction, the y-axis is arranged along the front-back direction, and the z-axis is arranged along the left-right direction, and the xy plane where the focus of the lens is located is used as the design reference;

[0020] In the xy plane, any point on the lower part of the light incident reference plane is taken as a deflection point, a deflection line segment is drawn from the deflection point to the outside of the light incident reference plane, and the deflection line segment is extended to both sides along the z axis to form the deflection structure.

[0021] Specifically, the design method for establishing the collection and reflection element is as follows: in the xy plane, establish area F, select any point in the area F as point B, set the midpoint of the deflection line segment as point C, set the position of the light-emitting unit as point A, take point A as the focus, take the line connecting point B and point C as the directrix, establish a parabola, intercept the parabola segment of the parabola located in the area F, and extend the parabola segment to both sides along the z-axis to form the collection and reflection element;

[0022] Among them, the perpendicular bisector of the line connecting the distance between the lens focus and the light incident reference plane and the perpendicular bisector of the line connecting the point A and the lens focus are the boundaries of the region F along the front-to-back direction, the upper boundary of the region F is not higher than the upper boundary point of the light incident reference plane, and is parallel to the line connecting the center of the light incident reference plane of the lens and the lens focus, and the distance between the lower boundary of the region F and the upper boundary of the region F is 1 / 5 of the diameter of the lens.

[0023] Furthermore, the portion of the light incident surface of the lens from the deflection point to the lower boundary point of the lens is deflected 0° to 15° clockwise or 0° to 10° counterclockwise around the deflection point to obtain the deflection line segment.

[0024] A third aspect of the present invention provides a vehicle lamp, which includes the above-mentioned low beam zone III forming module.

[0025] Through the above technical solution, the beneficial effects of the present invention are as follows:

[0026] A low beam zone III forming module provided in the first aspect of the present invention comprises a light emitting unit, a collecting reflective element and a lens arranged in sequence along a light propagation path, a deflection structure is formed at the lower part of the light incident reference plane of the lens, a first angle is formed between the light incident plane of the deflection structure and the light incident reference plane of the lens, the first angle is an acute angle, the collecting reflective element is configured to collect and converge stray light generated when the light emitting unit is working, and reflect the stray light to the deflection structure, and the deflection structure is configured to receive the stray light reflected by the collecting reflective element and project it through the lens to form a low beam zone III light pattern. The low beam zone III travel module provided by the present invention can form the low beam zone III using the stray light of the light emitting unit, and does not need to reflect part of the light used to form the low beam main light pattern by changing the structure on the light exit surface or the light incident reference plane of the lens to form the low beam zone III, which will not cause unevenness of the low beam main light pattern and will not affect the road illumination effect.

[0027] A second aspect of the present invention provides a design method for a low beam zone III forming module, specifically, a deflection structure is provided below a light incident reference plane of a lens, so that a first included angle of an acute angle is formed between the light incident plane of the deflection structure and the light incident reference plane of the lens;

[0028] A collecting and reflecting element is established between the lens and the light-emitting unit, so that the collecting and reflecting element can receive the stray light generated by the light-emitting unit when it is working, and reflect the stray light to the deflection structure, so that the low beam zone III light pattern is formed through the lens projection. According to the design method, the low beam zone III forming module provided in the first aspect can be designed, and the stray light of the light-emitting unit can be used to form the low beam zone III, and part of the light used to form the low beam main light pattern is no longer reflected, so as not to cause unevenness of the low beam main light pattern and not affect the road surface illumination effect.

[0029] The third part of the present invention provides a vehicle lamp, in which the low beam zone III forming module provided in the first aspect is used to form the low beam zone III, which will not cause unevenness of the low beam main light type and will not affect the road surface illumination effect.

[0030] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of a specific implementation of a low beam zone III forming module of the present invention;

[0033] Figure 2It is a schematic diagram of light propagation of a lens of a low beam zone III forming module of the present invention without a dispersion optimization structure;

[0034] Figure 3 It is a schematic diagram of light propagation in which the lens of the low beam zone III forming module of the present invention is provided with a dispersion optimization structure;

[0035] Figure 4 It is a schematic diagram of establishing coordinate axes for a specific implementation of the design method provided by the present invention;

[0036] Figure 5 This is the first specific embodiment of the present invention in which the lens of the low beam zone III forming module is provided with both a deflection structure and a dispersion optimization structure;

[0037] Figure 6 This is a second specific embodiment of the present invention in which the lens of the low beam zone III forming module is provided with both a deflection structure and a dispersion optimization structure.

[0038] Description of Reference Numerals

[0039] 1 Light-emitting unit 2 Collection and reflection element

[0040] 3 lenses 31 deflection structure

[0041] 32Dispersion Optimized Structure 41Blue Light

[0042] 42 Yellow light DETAILED DESCRIPTION

[0043] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", and "configured" should be understood in a broad sense. For example, the connection can be a direct connection or an indirect connection through an intermediate medium, a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connection member, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the terms "first" and "second" 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0046] See also Figure 1 In a first aspect, the present invention provides a low beam zone III forming module, comprising a light emitting unit 1, a collecting and reflecting element 2 and a lens 3 which are sequentially arranged along a light propagation path, a deflection structure 31 is formed in the lower half of the light incident reference plane of the lens 3, a first angle is formed between the light incident plane of the deflection structure 31 and the light incident reference plane of the lens 3, and the first angle is an acute angle, the collecting and reflecting element 2 is configured to collect and converge stray light generated when the light emitting unit 1 is working, and reflect these stray light toward the deflection structure 31, and the deflection structure 31 is configured to receive these stray light and reflect them, and then project them through the lens 3 to form a low beam zone III light pattern. The structure of the present invention is simple, and it can use the stray light of the light-emitting unit 1 to form the low beam zone III light pattern. It does not need to set a special structure on the light incident reference surface or the light exit surface of the lens 3, nor does it need to refract part of the light from the low beam main light pattern to form the low beam zone III, which results in uneven local light spots of the low beam main light pattern. When the low beam main light pattern is swung left and right, the dark area formed by the lost light will be clearly felt, affecting the road illumination effect. It can be understood that "swinging the low beam main light pattern left and right" means that when the vehicle drives to a curve and needs to turn, the low beam main light pattern changes direction to the left or right following the vehicle.

[0047] The present invention collects and utilizes the stray light of the light-emitting unit 1 through the cooperation of the deflection structure 31 and the collecting and reflecting element 2, thereby improving the utilization rate of light energy and avoiding energy waste. The stray light is used to form the low beam zone III, which not only does not affect the main light pattern of the low beam, but also can realize the functionality of the low beam zone III.

[0048] Further, as a specific embodiment of the present invention, the vertex of the first angle is located on the incident light reference plane of the lens 3, and is located between the center of the incident light reference plane of the lens 3 and the lower boundary end point of the incident light reference plane of the lens 3, and the angle of the first angle is -15° to 10°. In order to be able to form the main light pattern of the low beam without affecting the angle of the first angle between the incident light surface of the deflection structure 31 and the incident light reference plane of the lens 3, and the vertex position of the first angle is limited, such as Figure 1As shown, the deflection structure 31 is arranged in the lower half area of ​​the light incident reference plane of the lens 3, which will not affect the formation of the main light type of the low beam, and can also meet the need for deflecting stray light. The angle of the first angle is limited to -15°~10°. It can be understood that when the light incident surface of the deflection structure 31 is deflected around the vertex of the first angle toward the direction away from the light incident reference plane of the lens 3, the degree of the first angle is positive; when the light incident surface of the deflection structure 31 is deflected around the vertex of the first angle toward the direction close to the light incident reference plane of the lens 3, the degree of the first angle is negative. The specific deflection direction can be selected according to the specific use environment. As long as the deflection angle is controlled within -15°~10°, it will not affect the main light type of the low beam, and can meet the need to form the low beam III zone. In addition, the distinction between the positive and negative values ​​of the first angle can also be: in Figure 1 In the figure, the angle formed between the light incident surface of the deflection structure 31 and the light incident reference plane of the lens 3 after being deflected counterclockwise around the vertex of the first angle is positive, and the angle formed between the light incident surface of the deflection structure 31 and the light incident reference plane of the lens 3 after being deflected clockwise around the vertex of the first angle is negative.

[0049] Secondly, it should be understood that the “center of lens 3” refers to the intersection of the optical axis of lens 3 and the incident light reference plane, rather than the geometric center of the incident light reference plane of lens 3. Lens 3 can be Figure 1 and Figure 4 The regular semicircular lens shown, that is, looking at the lens 3 from the side, the shape of the lens 3 is similar to a semicircle, the straight side of the semicircle can be regarded as the light incident reference plane, and the midpoint of the semicircular straight side can be regarded as the geometric center of the light incident reference plane, which is also the intersection of the optical axis of the lens 3 and the light incident reference plane. Of course, the lens 3 can also be an asymmetric or irregular structure. In addition, in the description of the present invention, the "center of the light incident reference plane" is understood to be the center of the lens 3, rather than the geometric center of the light incident reference plane. Specifically, the deflection structure 31 and the lens 3 are an integrally formed part. Such a design can reduce production costs, and can also optimize the installation space required for the lens 3 and the deflection structure 31 as much as possible. At the same time, it can enhance the structural stability to prevent the deflection structure 31 from separating from the lens 3 due to excessive vibration amplitude during driving, affecting normal use.

[0050] Further, as a specific embodiment of the present invention, the collecting reflective element 2 in the present invention is a parabolic reflective element, and the upper boundary of the parabolic reflective element is not higher than the upper boundary point of the light incident reference plane of the lens 3. The parabolic reflective element has a good convergence effect on light, and can integrate the converged light rays to form a stable parallel light beam for reflection. The parabolic reflective element used in the present invention can well collect the stray light generated by the light-emitting unit 1 and reflect it toward the deflection structure 31. The setting position of the parabolic reflective element can also be limited to collect the stray light to the greatest extent and provide sufficient light for forming the low beam III zone.

[0051] In addition, as a specific embodiment of the present invention, the module for realizing low beam zone III provided by the present invention also includes a dispersion optimization structure 32, the dispersion optimization structure 32 is arranged on the light incident reference plane of the lens 3, and there is a second angle between the light incident plane of the dispersion optimization structure 32 and the light incident reference plane of the lens 3, the second angle is an acute angle, the vertex of the second angle is located on the light incident reference plane of the lens 3, and the distance between the vertex of the second angle and the center of the lens 3 in the vertical direction is -5mm to 5mm, and the angle of the second angle is -10° to 10°. It can be understood that in the discussion of the distance from the vertex of the second angle to the center of the lens 3 here, when the vertex of the second angle is above the center of the lens 3, the distance is a negative value, and when the vertex of the second angle is below the center of the lens 3, the distance is a positive value. The positive and negative values ​​of the second angle can be understood as follows: when the light incident surface of the dispersion optimization structure 32 is deflected around the vertex of the second angle in a direction away from the light incident reference plane of the lens 3, the degree of the second angle is positive; when the light incident surface of the dispersion optimization structure 32 is deflected around the vertex of the second angle in a direction close to the light incident reference plane of the lens 3, the degree of the second angle is negative. It can also be understood that the degree of the angle formed between the light incident surface of the dispersion optimization structure 32 and the light incident reference plane of the lens 3 after being deflected counterclockwise around the vertex of the second angle is positive, and the degree of the angle formed between the light incident surface of the dispersion optimization structure 32 and the light incident reference plane of the lens 3 after being deflected clockwise around the vertex of the second angle is negative.

[0052] The headlights currently used in the market generally use LEDs as light sources, and the main way for LEDs to achieve white light is to use a blue light LED chip to excite yellow phosphors, and the yellow-blue light emitted by the LED blue light and the yellow phosphors is used to synthesize white light. However, due to the different refractive indices of yellow light and blue light, when white light is formed and refracted through the lens 3, the low beam cutoff line often appears blue, which cannot meet the design requirements of the headlights. Therefore, the present invention sets a deflection structure 31 on the lens 3 and also sets a dispersion optimization structure 32 to avoid the low beam cutoff line appearing blue.

[0053] The main beam pattern of the low beam is below the HH axis of the light distribution screen, so the low beam light needs to be emitted from the upper half of the lens 3. The light that forms the low beam cut-off line comes from the light-emitting unit 1. The light-emitting unit 1 emits light into the middle upper area of ​​the light-entry reference plane of the lens 3. The light that forms the low beam cut-off line is basically emitted from the horizontal plane where the optical axis of the lens 3 is located, that is, emitted from the area above the vertex E of the lens 3. The light-emitting unit 1 emits white light from the upper half of the inner surface of the lens 3. Since the refractive index of the blue light 41 is greater than that of the yellow light under the same conditions, Figure 2 As shown, the blue light 41 is deflected at a larger angle, and the blue light 41 is at the bottom and the yellow light 42 is at the top in the lens 3. Then, after being emitted from the light-emitting surface of the lens 3, the blue light 41 will be closer to the optical axis of the lens 3. The intersection of the optical axis of the lens 3 and the light-emitting surface of the lens 3 is the vertex E. Since the curvature of the light-emitting surface of the lens 3 increases from the vertex E of the lens 3 to both ends, the yellow light 42 is deflected at a larger angle than the blue light 41 when emitted from the light-emitting surface. Therefore, the downward emission angle of the yellow light 42 becomes larger. In the transmission process after the light is emitted from the lens 3, the blue light 41 is at the top and the yellow light 42 is at the bottom. When projected onto the light distribution screen, the upper edge of the low beam cutoff line appears blue. However, the present invention utilizes the characteristic that the refractive index of blue light is greater than the refractive index of yellow light. By setting a dispersion optimization structure 32, after the white light is incident from the light-entering surface of the lens 3, the blue light 41 can be above the yellow light 42 when in the lens 3, as shown in FIG. Figure 3 As shown, when white light is refracted on the incident surface of the lens 3, dispersion occurs. Due to the presence of the dispersion optimization structure 32, the deflection angle of the blue light 41 becomes larger, and the blue light 41 is formed above the yellow light 42 in the lens 3. When the light is emitted from the light-emitting surface of the lens 3, since the curvature of the light-emitting surface of the lens 3 increases from the middle to the two ends of the light-emitting surface of the lens 3, the blue light 41 is deflected at a larger angle than the yellow light 41 when it is emitted from the light-emitting surface. Therefore, the downward emission angle of the blue light 41 becomes larger. In the transmission process after the light is emitted from the lens 3, the yellow light 42 is presented on the top and the blue light 41 is presented on the bottom. When projected onto the light distribution screen, the situation where the upper edge of the low beam cutoff line appears blue is avoided, thereby improving the effect of low beam illumination. It can be understood that the "light distribution screen" refers to a vertical screen set 25 meters in front of the vehicle.

[0054] Furthermore, the dispersion optimization structure 32, the deflection structure 31 and the lens 3 may be an integrally formed part. This design is to ensure the stability of the structure, the firmness during installation, and the stability during use.

[0055] Furthermore, if Figure 5 and Figure 6As shown, because the dispersion optimization structure 32 is arranged in the middle area of ​​the light incident reference plane of the lens 3, and the deflection structure 31 is arranged in the lower area of ​​the light incident reference plane of the lens 3, the dispersion optimization structure 32 and the deflection structure 31 do not interfere with each other. However, in order to make the structure of the lens 3 easier to install and produce, a rounded transition connection can be adopted between the deflection structure 31 and the dispersion optimization structure 32. The rounded transition connection can further optimize the refractive deviation between the deflection structure 31 and the dispersion optimization structure 32, so as to achieve a better optical effect and make the transition between the two structures uniform.

[0056] The second aspect of the present invention provides a design method for a low beam zone III forming module, which can design the low beam zone III forming module provided in the first aspect, and the specific steps include:

[0057] A deflection structure 31 is provided below the light incident reference plane of the lens 3, so that a first acute angle is formed between the light incident plane of the deflection structure 31 and the light incident reference plane of the lens 3;

[0058] A collecting and reflecting element 2 is established between the lens 3 and the light-emitting unit 1, so that the collecting and reflecting element 2 can receive the stray light generated when the light-emitting unit 1 is working, and reflect the stray light toward the deflection structure 31, so that the low beam zone III light pattern is formed through the projection of the lens 3.

[0059] See also Figure 4 , the following further describes how to set the deflection structure 31 at the lower part of the incident light reference plane of the lens 3. First, a rectangular coordinate system is established with the center of the incident light reference plane of the lens 3 as the origin, wherein the x-axis is arranged along the up-down direction, the y-axis is arranged along the front-back direction, and the z-axis is arranged along the left-right direction, and the xy plane where the focus of the lens 3 is located is used as the design reference;

[0060] In the xy plane, any point in the lower area of ​​the incident light reference plane of the lens 3 is taken as the deflection point, a deflection line segment is drawn from the deflection point to the outside of the incident light reference plane of the lens 3, and the deflection line segment is extended to both sides along the z axis to form a deflection structure 31.

[0061] For further information, see Figure 1 and Figure 4 , the design method for establishing the collection and reflection element 2 is as follows: in the XY plane, establish area F, select any point in area F as point B, set the midpoint of the deflection line segment as point C, set the position of the light-emitting unit 1 as point A, take point A as the focus, take the line connecting point B and point C as the directrix, establish a parabola, intercept the parabola segment located in area F, and extend the parabola segment to both sides along the Z axis to form the collection and reflection element 2;

[0062] The perpendicular bisector of the line connecting the distance between the focus of lens 3 and the incident light reference plane of lens 3 and the perpendicular bisector of the line connecting point A and the focus of lens 3 are the boundaries of region F along the front-back direction. The upper boundary of region F is not higher than the upper boundary point of the incident light reference plane of lens 3 and is parallel to the line connecting the center of lens 3 and the focus of lens 3. The distance between the lower boundary of region F and the upper boundary of region F is 1 / 5 of the diameter of lens 3. It can be understood that the focus of lens 3 refers to the point where a beam of light parallel to the main optical axis intersects after passing through the convex lens. This point is called the "focus".

[0063] In addition, in order to avoid affecting the low beam main light type formed by the light-emitting element through the lens 3, the deflection angle of the deflection structure 31 is limited, and the part from the deflection point on the light incident surface of the lens 3 to the lower boundary point of the light incident reference surface of the lens 3 is deflected 0° to 15° clockwise or 0° to 10° counterclockwise around the deflection point in the XY plane to obtain a deflection line segment.

[0064] It is understandable that in actual production and manufacturing, the specific size of the lens of the headlight required by the specific model of the specific vehicle can be deduced. First, the low beam zone III is formed above the HH axis of the light distribution screen, and the light at the measuring point of the low beam zone III is selected. For example, the light at 2° and 4° on the HH axis is reversely incident from the light exit surface of the lens 3, and enters the interior of the lens after being refracted by the light exit surface of the lens 3. A deflection structure 31 is set, and the angle between the light incident surface of the deflection structure 31 and the light incident reference plane of the lens 3 is limited to -15°~10°, so that the two reverse light rays can be emitted from the gap between the light incident reference plane of the lens and the focus of the lens 3 after being refracted by the deflection structure 31. Then, a collecting and reflecting element 2 is set in the F area, and the reverse light is reflected by the collecting and reflecting element 2 so that the reverse light is converged on the light-emitting unit 1, so as to confirm the specific deflection angle of the deflection structure 31 and the specific setting position of the collecting and reflecting element 2. It is understandable that, combined with Figure 4, the plane where the light distribution screen is located is parallel to the xoz plane, and the 2° and 4° directions on the HH axis are assumed to be two fixed points. The two reverse light rays are emitted from these two fixed points respectively, wherein the light distribution screen is a screen set 25 meters in front of the vehicle, which is used to detect the light distribution performance of the vehicle lights. The HH axis is a horizontal line passing through the HV point on the light distribution screen. The design method provided in the second aspect of the present invention can design a low beam III zone forming module, which collects the stray light generated by the light-emitting unit 1, deflects it through the deflection structure 31, and forms the low beam III zone light type after being projected through the lens 3. The module does not need to set a special structure on the light incident reference plane and the light exiting surface of the lens 3, and does not need to form the low beam III zone through the light of the low beam main light type formed by the deflection part, thereby avoiding the uneven local light spot of the low beam main light type due to insufficient reflected light and other factors. When the low beam main light type is swung left and right, the dark area formed by the lost light will be clearly felt, which affects the road illumination effect.

[0065] The third aspect of the present invention provides a headlight, in which the module for forming the low beam zone III provided in the first aspect is installed, and the module does not need to be specially structured on the light entry reference surface and the light exit surface of the lens 3, and does not need to form the low beam zone III by deflecting the light used to form the main low beam light type, thereby avoiding the problem of uneven local spot of the low beam caused by insufficient reflected light and the like in the main low beam light type, and the dark area formed by the lost light can be clearly felt when the low beam is swung left and right, which affects the road illumination effect. Therefore, the headlight has the advantages of saving energy and improving the utilization rate of light energy.

[0066] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "a specific implementation", etc. 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 present invention. In the present invention, 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.

[0067] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0069] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A low beam zone III forming module, It is characterized in that The invention comprises a light-emitting unit (1), a collecting and reflecting element (2) and a lens (3) which are sequentially arranged along a light propagation path; a deflection structure (31) is formed at the lower part of a light incident reference plane of the lens (3); a first acute angle is formed between the light incident plane of the deflection structure (31) and the light incident reference plane; the collecting and reflecting element (2) is configured to collect and converge stray light generated when the light-emitting unit (1) is working, and reflect the stray light toward the deflection structure (31); the deflection structure (31) is configured to receive the stray light reflected by the collecting and reflecting element (2) and project it through the lens (3) to form a low beam zone III light pattern.

2. The low beam zone III forming module according to claim 1, It is characterized in that The vertex of the first angle is located on the light incident reference plane and between the center of the light incident reference plane and the lower end point of the light incident reference plane. The first angle is -15° to 10°.

3. The low beam zone III forming module according to claim 2, It is characterized in that The deflection structure (31) and the lens are integrally formed.

4. The low beam zone III forming module according to claim 3, It is characterized in that The collecting reflection element (2) is a parabolic reflection element, and the upper boundary of the parabolic reflection element is not higher than the upper boundary point of the light incident reference plane.

5. The low beam zone III forming module according to claim 1, It is characterized in that It also includes a dispersion optimization structure (32), which is arranged on the light incident reference plane, and there is a second acute angle between the light incident plane of the dispersion optimization structure (32) and the light incident reference plane of the lens (3), the vertex of the second angle is located on the light incident reference plane of the lens (3), and the distance between the vertex of the second angle and the center of the light incident reference plane in the vertical direction is -5mm to 5mm, and the angle of the second angle is -10° to 10°.

6. The low beam zone III forming module according to claim 5, It is characterized in that The dispersion optimization structure (32), the lens (3), and the deflection structure (31) are an integrally formed part.

7. The low beam zone III forming module according to claim 6, It is characterized in that The dispersion optimization structure (32) and the deflection structure (31) adopt rounded transition.

8. A design method for forming a low beam zone III module, It is characterized in that A low beam zone III forming module for designing any one of claims 1 to 7, comprising: A deflection structure (31) is arranged below the light incident reference plane of the lens (3), so that a first acute angle is formed between the light incident plane of the deflection structure (31) and the light incident reference plane; A collecting and reflecting element (2) is established between the lens (3) and the light-emitting unit (1), so that the collecting and reflecting element (2) can receive stray light generated when the light-emitting unit (1) is in operation, and reflect the stray light toward the deflection structure (31), so that a low beam zone III light pattern is formed by projection through the lens (3).

9. The design method of the low beam zone III forming module according to claim 8, It is characterized in that The design method of arranging the deflection structure (31) below the light incident reference plane is as follows: A rectangular coordinate system is established with the center of the incident light reference surface of the lens (3) as the origin, wherein the x-axis is arranged along the up-down direction, the y-axis is arranged along the front-back direction, and the z-axis is arranged along the left-right direction, and the xy plane where the focus of the lens (3) is located is used as the design reference; In the xy plane, any point on the lower part of the incident light reference plane is taken as a deflection point, a deflection line segment is drawn from the deflection point to the outside of the incident light reference plane, and the deflection line segment is extended to both sides along the z axis to form the deflection structure (31).

10. The design method of the low beam zone III forming module according to claim 9, It is characterized in that The design method for establishing the collection reflection element (2) is as follows: in the xy plane, an area F is established, any point in the area F is selected as point B, the midpoint of the deflection line segment is set as point C, the position of the light-emitting unit (1) is set as point A, point A is used as a focus, and the line connecting point B and point C is used as a directrix to establish a parabola, and the parabola segment of the parabola located in the area F is intercepted, and the parabola segment is extended to both sides along the z-axis to form the collection reflection element (2); The perpendicular bisector of the line connecting the distance between the focus of the lens (3) and the light incident reference plane and the perpendicular bisector of the line connecting the point A and the focus of the lens (3) are the boundaries of the region F along the front-back direction; the upper boundary of the region F is not higher than the upper boundary point of the light incident reference plane and is parallel to the line connecting the center of the light incident reference plane of the lens (3) and the focus of the lens (3); the distance between the lower boundary of the region F and the upper boundary of the region F is 1 / 5 of the diameter of the lens (3).

11. The design method of the low beam zone III forming module according to claim 9, It is characterized in that The portion of the incident light reference plane from the deflection point to the lower boundary point of the lens (3) is deflected 0° to 15° clockwise or 0° to 10° counterclockwise around the deflection point to obtain the deflection line segment.

12. A car light, It is characterized in that It comprises a low beam zone III forming module according to any one of claims 1 to 7.

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