American standard light distribution system and its light distribution application of high and low beam integrated lamp and split lamp

Abstract

The present invention relates to the field of vehicle lighting technology, and specifically to an American standard light distribution system and a high and low beam integrated lamp and a split lamp for its light distribution application. The light distribution system includes a lamp body, a low beam unit installed in the lamp body, a high beam unit, and a diffuse light unit distributed on both sides of the low beam unit and the high beam unit; wherein a shading sheet and a low beam convex mirror are sequentially fixed on the light output path of a low beam LED module through a low beam convex mirror bracket, and the light emission center of the low beam LED module is offset to the upper right relative to the center of the low beam convex mirror; the high beam convex mirror is fixed on the light output path of the high beam LED module through a high beam convex mirror bracket, and the light emission center of the high beam LED module coincides with the center of the high beam convex mirror; the diffuse mirror in the diffuse light unit is fixedly installed on the light output path of the diffuse light LED module. The light distribution system provided by the present invention not only makes the dimming function of the automobile headlamp more perfect, but also solves the light distribution problem for DOT certification because the light distribution system meets the light distribution requirements specified in the FMVSS 108 standard.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lighting, and in particular to an American standard light distribution system and a high and low beam integrated lamp and a split lamp used in the light distribution. Background Art

[0002] The United States federal government has formulated the motor vehicle safety standard FMVSS 108, and products that meet these standards are called DOT certified products. All motor vehicles and major parts that want to enter the North American market must be DOT certified and have the DOT logo printed on the products. At present, the light distribution system of domestic vehicle headlights cannot meet the requirements of this standard, cannot pass the DOT certification, and the corresponding products cannot be sold in the American market. In order to meet the needs of foreign trade, it is urgent to design a light distribution system for American standard automobile headlights to meet the light distribution performance requirements stipulated in the FMVSS 108 standard, so as to obtain DOT certification. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned problems existing in the background technology, and to provide an American standard light distribution system and a high and low beam integrated lamp and a split lamp used in the light distribution.

[0004] In order to achieve the above-mentioned object, the first aspect of the present invention provides an American standard light distribution system, the light distribution system comprising a lamp body 9, a low beam unit, a high beam unit and a diffuse light unit installed in the lamp body 9;

[0005] The low beam unit includes a low beam LED module 1, a low beam convex mirror bracket 10, a light shielding sheet 2 and a low beam convex mirror 3. The light shielding sheet 2 and the low beam convex mirror 3 are sequentially fixed on the light path of the low beam LED module 1 through the low beam convex mirror bracket 10 to ensure that the light emission center of the low beam LED module 1 is offset to the upper right by a certain distance relative to the center of the low beam convex mirror 3.

[0006] The high-beam unit includes a high-beam LED module 4, a high-beam convex mirror bracket 12 and a high-beam convex mirror 5. The high-beam convex mirror 5 is fixed on the light path of the high-beam LED module 4 through the high-beam convex mirror bracket 12 to ensure that the light emission center of the high-beam LED module 4 coincides with the center of the high-beam convex mirror 5.

[0007] The diffuse light unit includes a left diffuse light LED module 71 and a left diffuser mirror 81 distributed on the left side of the low beam unit and the high beam unit, and a right diffuser light LED module 72 and a right diffuser mirror 82 distributed on the right side of the low beam unit and the high beam unit, wherein the left diffuser mirror 81 and the right diffuser mirror 82 are fixedly mounted on the light output paths of the left diffuse light LED module 71 and the right diffuser light LED module 72, respectively.

[0008] Preferably, the shading sheet 2 is a metal sheet with a certain thickness, and its shading edge includes two straight edges parallel to each other and a folded edge connecting the two straight edges at an angle of 45°;

[0009] Wherein, the distance between the two parallel straight edges is 0.3-0.5 mm.

[0010] Preferably, the low beam convex mirror 3 is an ellipsoidal crown made of high borosilicate glass, and the curvature coefficient is an elliptical curvature coefficient, including: the crown height is 20.5-21.2 mm, the diameter of the circular crown bottom is 49-50 mm, and a flange edge is provided around the crown bottom;

[0011] The low-beam convex mirror bracket 10 is provided with a first annular groove, and the flange edge of the low-beam convex mirror 3 is embedded in the first annular groove and fixed by a first clamping ring 11, and ensures that the distance between the light-emitting surface of the low-beam LED module 1 and the crown bottom of the low-beam convex mirror 3 is 31 to 32.5 mm.

[0012] Preferably, the high-beam convex lens 5 is a deformed aspheric surface made of high borosilicate glass, and the X-axis and Y-axis coefficients of the deformed aspheric surface are both elliptical surface coefficients, including: the major axis of the elliptical crown bottom is 62-63.5 mm, the minor axis is 56.5-58 mm, the crown height is 24.5-25.5 mm, and a flange edge is provided at the periphery of the crown bottom;

[0013] A second annular groove is provided on the high-beam convex mirror bracket 12, and the flange edge of the high-beam convex mirror 5 is embedded in the second annular groove and fixed by a second clamping ring 13, ensuring that the distance between the light-emitting surface of the high-beam LED module 4 and the crown bottom of the high-beam convex mirror 5 is 29 to 31 mm.

[0014] Preferably, the light-incoming end of the left diffuser 81 and the right diffuser 82 is a plane, the light-outgoing end is a quadratic surface, the surface coefficient is an elliptical surface coefficient, and the diameter increases gradually from the light-incoming end to the light-outgoing end;

[0015] A window mirror 18 is provided on one side of the light emitting end curved surface of the left diffuser 81 and the right diffuser 82;

[0016] Flange edges are respectively arranged on two pairs of side edges of the light incident end planes of the left diffuser 81 and the right diffuser 82, each flange edge is provided with a bolt hole 6, and the flange edges of the left diffuser 81 and the right diffuser 82 are respectively mounted on the lamp body 9 by screws.

[0017] Preferably, the light distribution system further comprises a power drive board 16 installed in the lamp body 9, and a decorative board 14 and a mask 15 fixed to the open end of the lamp body 9;

[0018] The low-beam LED module 1, the high-beam LED module 4, the left diffused-light LED module 71 and the right diffused-light LED module 72 are respectively integrated on the power drive board 16, and the power line 17 led out from the power drive board 16 passes through the outlet hole at the bottom of the lamp body 9 and is connected to the external circuit;

[0019] The low-beam convex mirror bracket 10 and the high-beam convex mirror bracket 12 are integrally formed and fixed to the inner bottom of the lamp body 9 by screws, and the decorative plate 14 is installed on the non-light-emitting surfaces of the low-beam convex mirror bracket 10 and the high-beam convex mirror bracket 12;

[0020] The inner wall of the open end of the lamp body 9 is provided with a positioning groove, and the periphery of the mask 15 is provided with a snap-fit ​​structure matching the positioning groove. The mask 15 is installed on the open end of the lamp body 9 through the snap-fit ​​structure, and its gap is sealed by silicone.

[0021] A second aspect of the present invention provides a high and low beam integrated lamp, wherein the high and low beam integrated lamp is provided with a low beam unit, a high beam unit and a diffuse light unit in the above-mentioned light distribution system;

[0022] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be circular, and the opening size is: ￠178mm.

[0023] A third aspect of the present invention provides a high and low beam integrated lamp, wherein the high and low beam integrated lamp is provided with a low beam unit, a high beam unit and a diffuse light unit in the above light distribution system;

[0024] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be rectangular, and the opening size is: 200mm×142mm.

[0025] A fourth aspect of the present invention provides a low beam lamp, wherein the low beam lamp is provided with a low beam unit and a diffuse light unit in the above light distribution system;

[0026] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be rectangular, and the opening size is: 167mm×106mm.

[0027] A fifth aspect of the present invention provides a high beam lamp, wherein the high beam lamp is provided with a high beam unit and a diffuse light unit in the above light distribution system;

[0028] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be rectangular, and the opening size is 167 mm×106 mm.

[0029] The light distribution system provided by the scheme of the present invention can not only realize the switching between the high and low beams of the vehicle headlights, but also use the diffused light unit to assist the low beam unit and the high beam unit to respectively realize the low beam light distribution test and the high beam light distribution test. The diffused light unit forms a light band at the edge of the low beam light shape and the high beam light shape, thereby expanding the illumination range of the high and low beams, and at the same time meets the requirements of the FMVSS108 standard for the high and low beam light shapes and the requirements for the illuminance of each light distribution test point. Therefore, the light distribution system provided by the present invention not only makes the dimming function of the vehicle headlights more perfect, but also solves the light distribution problem for DOT certification because the light distribution system meets the light distribution requirements specified in the FMVSS 108 standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the right side cross-section of the light distribution system;

[0031] Figure 2 It is a top view cross-section of the light distribution system;

[0032] Figure 3 is a top view of the shading sheet;

[0033] Figure 4 It is a schematic diagram of the low beam light shape;

[0034] Figure 5 It is a schematic diagram of the high beam light shape;

[0035] Figure 6 It is the low beam light distribution test screen;

[0036] Figure 7 It is the high beam distribution test screen;

[0037] Figure 8 It is the main view of the low beam convex mirror;

[0038] Fig. 9 It is a top view of the low beam convex mirror;

[0039] Fig.10 It is the main view of the high beam convex mirror;

[0040] Fig.11 It is a top view of the high beam convex mirror;

[0041] Fig.12 It is the main view of the diffuser;

[0042] Fig.13 is a top view of the diffuser;

[0043] Fig.14 is a right side cross-sectional view of the diffuser;

[0044] Fig.15 It is the first structural diagram of the realization form of the light distribution system;

[0045] Fig.16 It is the second structural diagram of the realization form of the light distribution system;

[0046] Fig.17 It is the third structural diagram of the realization form of the light distribution system;

[0047] Fig.18 It is the fourth structural diagram of the light distribution system implementation form.

[0048] Description of Reference Numerals

[0049] Low beam LED module 1; shading sheet 2; low beam convex mirror 3; high beam LED module 4; high beam convex mirror 5; bolt hole 6; left diffused light LED module 71; right diffused light LED module 72; left diffuser 81; right diffuser 82; lamp body 9; low beam convex mirror bracket 10; first clamping ring 11; high beam convex mirror bracket 12; second clamping ring 13; decorative panel 14; mask 15; power drive board 16; power cord 17, window mirror 18. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0051] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0052] In order to solve the problem that the current domestic vehicle light distribution system cannot pass DOT certification, the present invention provides a light distribution system of American standard LED automobile headlights, such as Figure 1 and Figure 2 As shown, the American standard light distribution system includes a lamp body 9, a low beam unit, a high beam unit and a diffuse light unit installed in the lamp body 9.

[0053] The low beam unit includes a low beam LED module 1, a low beam convex mirror bracket 10, a shading sheet 2 and a low beam convex mirror 3. The shading sheet 2 and the low beam convex mirror 3 are fixed in sequence on the light path of the low beam LED module 1 through the low beam convex mirror bracket 10, ensuring that the light emission center of the low beam LED module 1 is offset to the upper right by a certain distance relative to the center of the low beam convex mirror 3. In the low beam unit, the shading sheet 2 and the low beam convex mirror 3 distribute the light energy generated by the low beam LED module 1 to the low beam distribution area, and finally realize the low beam distribution scheme in accordance with the FMVSS108 standard by repeatedly adjusting and optimizing the low beam light shape and the illuminance of a series of test points.

[0054] The high beam unit includes a high beam LED module 4, a high beam convex mirror bracket 12 and a high beam convex mirror 5. The high beam convex mirror 5 is fixed on the light path of the high beam LED module 4 through the high beam convex mirror bracket 12 to ensure that the light emission center of the high beam LED module 4 coincides with the center of the high beam convex mirror 5. In the high beam unit, the high beam convex mirror 5 distributes the light energy generated by the high beam LED module 4 to the high beam light distribution area, and finally realizes the high beam light distribution scheme that meets the FMVSS108 standard by repeatedly adjusting and optimizing the high beam light shape and the illuminance of a series of test points.

[0055] The diffuse light unit is provided at the edge of the low beam unit and the high beam unit. In the present invention, the diffuse light unit includes a left diffuse light LED module 71 and a left diffuser 81 distributed on the left side of the low beam unit and the high beam unit, and a right diffuser 82 and a right diffuser 82 on the right side of the low beam unit and the high beam unit, wherein the left diffuser 81 and the right diffuser 82 are respectively fixedly mounted on the light emitting paths of the left diffuse light LED module 71 and the right diffuser 82. The diffuse light unit forms light bands at the edges of the low beam distribution area and the high beam distribution area, respectively, to expand the illumination range of the low beam and the high beam. At the same time, by repeatedly adjusting and optimizing the illuminance of a series of supplementary test points in the low beam light band and the high beam light band, the low beam and high beam light distribution schemes specified in the FMVSS108 standard are realized.

[0056] According to the light distribution system provided by the above technical solution, not only can the high and low beam switching of the vehicle headlights be realized, but also the diffusion light unit is used to assist the low beam unit and the high beam unit to realize the low beam light distribution test and the high beam light distribution test respectively. The diffusion light unit forms light bands at the edges of the low beam light shape and the high beam light shape respectively, which expands the illumination range of the high and low beams, and meets the requirements of the FMVSS108 standard for the high and low beam light shapes and the requirements for the illuminance of each light distribution test point. Therefore, the light distribution system provided by the present invention not only makes the dimming function of the automobile headlights more perfect, but also solves the light distribution problem for DOT certification because the light distribution system meets the light distribution requirements specified in the FMVSS 108 standard.

[0057] In the present invention, the light emitted by the low-beam LED module 1 is sequentially projected through the shading sheet 2 and the low-beam convex mirror 3, and the light emitted by the diffused light LED module is projected through the diffuser to form a low-beam light shape. Figure 4 The projection of the light emitted by the high-beam LED module 4 after passing through the high-beam convex mirror 5 and the projection of the light emitted by the diffused light LED module after passing through the diffuser together form the high-beam light shape, as shown in FIG. Figure 5 shown.

[0058] In fact, the Federal Motor Vehicle Safety Standard FMVSS108 stipulates the illumination requirements for a series of test points in the low beam and high beam distribution areas. During the distribution process, the low beam and high beam are projected onto the distribution test screen respectively, and the illumination of a series of test points in the distribution test screen is tested. Figure 6 and Figure 7 A series of low beam test points and high beam test points in the low beam and high beam distribution test screen that comply with the FMVSS108 standard are shown respectively.

[0059] According to a preferred embodiment of the present invention, the shading sheet 2 is a metal shading sheet 2 with a certain thickness. The shading sheet 2 realizes the light distribution function through its shading edge. The shading sheet 2 is preferably made of metal aluminum with a thickness of 1 mm. In practical applications, the light emitted by the low-beam LED module 1 is successively blocked by the shading sheet 2 and focused by the low-beam convex mirror 3, and then projected into a low-beam light shape with a specific light-dark cutoff line shape to prevent glare to oncoming drivers and ensure driving safety. Figure 3 As shown, the shading edge of the shading sheet 2 includes two parallel straight edges and a folded edge connecting the two straight edges at an angle of 45°, and the distance between the two parallel straight edges of the shading edge is 0.3-0.5 mm, preferably 0.4 mm.

[0060] As a specific implementation method, the shading sheet 2 shields invalid light energy to prevent the driver from glaring, thereby ensuring driving safety. At the same time, it ensures that the low beam test point near the light cutoff line of the low beam light shape, such as Figure 6 As shown, the illuminance of 0.5D-1.5~1L, 0.5U-1.5~1L, 1U-1.5~1L, 1.5U-1~R and 0.5U-1~3R meets the requirements of FMVSS108 standard.

[0061] like Figure 8 and Fig. 9 As shown, the low beam convex mirror 3 is an ellipsoidal crown made of high borosilicate glass, and the curvature coefficient is an ellipsoidal curvature coefficient, specifically including: the crown height is 20.5-21.2 mm, preferably 20.9 mm, the diameter of the circular crown bottom is 49-50 mm, preferably 49.5 mm, and a flange edge is provided around the crown bottom, and the diameter of the flange edge is preferably 54.5 mm.

[0062] In the present invention, a first annular groove is provided on the low-beam convex mirror bracket 10, and the low-beam convex mirror 3 is installed as follows: the flange edge of the low-beam convex mirror 3 is embedded in the first annular groove and fixed by a first clamping ring 11, and ensure that the distance between the light-emitting surface of the low-beam LED module 1 and the crown bottom of the low-beam convex mirror 3 is 31 to 32.5 mm, preferably 31.5 mm.

[0063] As a specific implementation, the light emitting surface of the low beam convex mirror 3 is a quadratic surface, and the low beam convex mirror 3 is used to focus the light emitted by the low beam LED module 1 and then project it out to achieve low beam lighting, such as Figure 4 The middle highlight area of ​​the low beam convex mirror 3 has the following light distribution functions: to ensure that the low beam test point in the center of the low beam light shape is Figure 6 As shown, the illuminances including 0.86DV, 0.6D-1.3R and 1.5D-2R meet the requirements of FMVSS108 standard.

[0064] like Fig.10 and Fig.11 As shown, the high-beam convex mirror 5 is a deformed aspheric surface made of high borosilicate glass. The front projection and side projection of the high-beam convex mirror 5 are both elliptical curves with the bottom truncated, and the lengths of the major axis and minor axis of the front projection are greater than those of the side projection. The X-axis and Y-axis coefficients of the deformed aspheric surface are both elliptical surface coefficients, specifically including: the major axis of the elliptical crown bottom is 62-63.5 mm, preferably 62.5 mm, the minor axis is 56.5-58 mm, preferably 57 mm, the crown height is 24.5-25.5 mm, preferably 25 mm, and a flange edge is provided around the crown bottom, and the major axis of the flange edge is preferably 66.85 mm, and the minor axis is 62 mm.

[0065] In the present invention, a second annular groove is provided on the high-beam convex mirror bracket 12, and the installation method of the high-beam convex mirror 5 is: the flange edge of the high-beam convex mirror 5 is embedded in the second annular groove and fixed by a second clamping ring 13, ensuring that the distance between the light-emitting surface of the high-beam LED module 4 and the crown bottom of the high-beam convex mirror 5 is 29 to 31 mm, preferably 29.5 mm.

[0066] As a specific implementation, the high-beam convex mirror 5 is used to focus the light emitted by the high-beam LED module 4 and then project it out to achieve the purpose of long-range lighting, such as Figure 5 The rectangular light shape in the middle area, the light distribution function of the high beam convex mirror 5 is to ensure that the high beam test point in the center of the high beam light shape, such as Figure 7 As shown, the illumination of HV, H-2U, H-1.5D, H-2.5D, H-3L, 1U-3L, H-6L, H-9L, H-3R, 1U-3R, H-6R and H-9R meets the requirements of FMVSS108 standard.

[0067] In the present invention, the diffuser is made of PC plastic, combined with Figure 12 to Figure 14 The light-entry end of the left diffuser 81 and the right diffuser 82 is a plane, and the light-emitting end is a quadratic surface, and the diameter gradually increases from the light-entry end to the light-emitting end. The light emitted by the diffused light LED module is projected as a horizontal light band after passing through the diffuser, and the light band is a low-beam light band or a high-beam light band. A window mirror 18 is provided on one side of the curved surface of the light-emitting end of the left diffuser 81 and the right diffuser 82.

[0068] In the present invention, flange edges are respectively provided on the two pairs of side edges of the light incident end planes of the left diffuser 81 and the right diffuser 82, and a bolt hole 6 is provided on each flange edge. The diffuser is installed by respectively installing the flange edges of the left diffuser 81 and the right diffuser 82 on the lamp body 9 by screws.

[0069] Specifically, the light emitted by the left diffuse light LED module 71 is projected into a left light band at the edge of the low beam or high beam light shape after passing through the left diffuser 81; the light emitted by the right diffuser LED module 72 is projected into a right light band at the edge of the low beam or high beam light shape after passing through the right diffuser 82.

[0070] As a specific implementation, the diffuser is used to project the light emitted by the diffuse light LED module into a horizontal light band. The light distribution function of the diffuser is to ensure that the supplementary test points in the low beam light band, such as Figure 6 As shown, the illumination of 0.86D-3.5L, H-4L, H-8L, 2D-8L, 2D-15L, 4D-20L, 2D-9R, 2D-15R and 4D-20R meets the requirements of FMVSS108 standard;

[0071] And, ensure additional test points in the high beam light band, such as Figure 7 As shown, the illumination of H-9L, H-12L, 1.5D-9L, 2.5D-12L, H-9R, H-12R, 1.5D-9R and 2.5D-12R meets the requirements of FMVSS108 standard.

[0072] The light distribution function of the window mirror 18 is to: direct the low beam test point located on the center line of the low beam light distribution test screen, that is, above the H line, such as Figure 6 As shown, 4U-8L, 4U-8R, 2U-4L, 1.5U-1~3R and 0.5U-1~3R provide compensation light and ensure that the illumination of the above test points meets the requirements of FMVSS108 standard.

[0073] Furthermore, the light distribution system further comprises a power drive board 16 installed in the lamp body 9, and a decorative board 14 and a mask 15 fixed to the open end of the lamp body 9. The power drive board 16 is fixed to the lamp body 9 by screws.

[0074] Specifically, the low beam LED module 1, the high beam LED module 4, the left diffused light LED module 71 and the right diffused light LED module 72 are respectively integrated on the power driving board 16, and the power line 17 led out from the power driving board 16 passes through the wire outlet hole at the bottom of the lamp body 9 and is connected to the external circuit.

[0075] The low-beam convex mirror bracket 10 and the high-beam convex mirror bracket 12 are integrally formed and fixed to the inner wall of the lamp body 9 by screws. The decorative plate 14 is installed on the non-light-emitting surfaces of the low-beam convex mirror bracket 10 and the high-beam convex mirror bracket 12.

[0076] The inner wall of the open end of the lamp body 9 is provided with a positioning groove, and the periphery of the mask 15 is provided with a snap-fit ​​structure matching the positioning groove. The mask 15 is installed on the open end of the lamp body 9 through the snap-fit ​​structure, and its gap is sealed by silicone.

[0077] As an extension, the present invention applies the light distribution system to four structural forms of automobile headlights. In practical applications, the specific structures of the headlights may not be limited to the following four types.

[0078] A second aspect of the present invention provides a high and low beam integrated lamp, such as Fig.15 As shown, the high and low beam integrated lamp is provided with the low beam unit, high beam unit and diffused light unit in the above light distribution system. The diffused light units are respectively provided on the left and right sides of the high and low beam lighting unit column, together forming a high and low beam integrated headlamp structure.

[0079] The lamp body 9, the decorative plate 14 and the mask 15 of the light distribution system are designed to be circular, and the opening size is: ￠178mm, corresponding to the American standard 2D1.

[0080] A third aspect of the present invention provides a high and low beam integrated lamp, such as Fig.16 As shown, the high and low beam integrated lamp is provided with the low beam unit, high beam unit and diffused light unit in the above light distribution system. The diffused light units are respectively provided on the left and right sides of the high and low beam lighting unit column, together forming a high and low beam integrated headlamp structure.

[0081] The lamp body 9, the decorative plate 14 and the mask 15 of the light distribution system are designed to be rectangular, and the opening size is: 200mm×142mm, corresponding to the American standard 2B1.

[0082] like Fig.17 As shown, the fourth aspect of the present invention provides a low beam lamp, in which the low beam lamp is provided with the low beam unit and the diffused light unit in the above light distribution system. The diffused light units are respectively provided on both sides of the low beam unit to form a low beam headlamp structure.

[0083] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be rectangular, and the opening size is: 167mm×106mm, corresponding to the American standard 2A1 low beam.

[0084] A fifth aspect of the present invention provides a high beam lamp, such as Fig.18 As shown, the high beam lamp is provided with a high beam unit and a diffuse light unit in the above light distribution system. The diffuse light units are respectively provided on both sides of the high beam unit to form a high beam headlamp structure.

[0085] The lamp body 9, the decorative plate 14 and the mask 15 are designed to be rectangular, and the opening size is 167 mm×106 mm, corresponding to the American standard 2A1 high beam.

[0086] In the present invention, a diffuse light unit is combined with a low beam unit and / or a high beam unit to form a high and low beam integrated lamp and a split lamp for light distribution applications. By distributing the light energy generated by a high beam light source, a low beam light source and a diffuse light source to different position areas, a low beam light shape and a high beam light shape that meet the requirements of the FMVSS108 standard are formed. By repeatedly adjusting and optimizing the illuminance of a series of low beam test points, high beam test points and supplementary test points, a high and low beam light distribution scheme that meets the requirements of the FMVSS108 standard is finally achieved.

[0087] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A US standard light distribution system, characterized in that: The light distribution system comprises a lamp body (9), a low beam unit, a high beam unit and a diffuse light unit installed in the lamp body (9); The low-beam unit comprises a low-beam LED module (1), a low-beam convex mirror bracket (10), a light shielding sheet (2) and a low-beam convex mirror (3); the light shielding sheet (2) and the low-beam convex mirror (3) are fixed in sequence on the light output path of the low-beam LED module (1) through the low-beam convex mirror bracket (10), so as to ensure that the light emission center of the low-beam LED module (1) is offset to the upper right by a certain distance relative to the center of the low-beam convex mirror (3); The high-beam unit comprises a high-beam LED module (4), a high-beam convex mirror bracket (12) and a high-beam convex mirror (5); the high-beam convex mirror (5) is fixed on the light path of the high-beam LED module (4) through the high-beam convex mirror bracket (12), ensuring that the light emission center of the high-beam LED module (4) coincides with the center of the high-beam convex mirror (5); The diffuse light unit comprises a left diffuse light LED module (71) and a left diffuser mirror (81) distributed on the left side of the low beam unit and the high beam unit, and a right diffuser light LED module (72) and a right diffuser mirror (82) distributed on the right side of the low beam unit and the high beam unit, wherein the left diffuser mirror (81) and the right diffuser mirror (82) are respectively fixedly mounted on the light output paths of the left diffuse light LED module (71) and the right diffuser light LED module (72); The shading sheet (2) is a metal sheet with a certain thickness, and its shading edge comprises two straight edges parallel to each other and a folded edge connecting the two straight edges at an angle of 45°; Wherein, the distance between the two parallel straight edges is 0.3 to 0.5 mm; The light-incoming ends of the left diffuser (81) and the right diffuser (82) are planes, the light-emitting ends are quadratic surfaces, the surface coefficients are elliptical surface coefficients, and the diameters gradually increase from the light-incoming ends to the light-emitting ends; A window mirror (18) is provided on one side of the light-emitting end curved surface of the left diffusion mirror (81) and the right diffusion mirror (82).

2. The light distribution system according to claim 1, characterized in that: The low beam convex lens (3) is an ellipsoidal crown made of high borosilicate glass, and the curvature coefficient is an elliptical curvature coefficient, including: a crown height of 20.5-21.2 mm, a diameter of a circular crown bottom of 49-50 mm, and a flange edge is arranged around the crown bottom; The low-beam convex mirror bracket (10) is provided with a first annular groove, the flange edge of the low-beam convex mirror (3) is embedded in the first annular groove and is fixed by a first clamping ring (11), and ensures that the distance between the light-emitting surface of the low-beam LED module (1) and the crown bottom of the low-beam convex mirror (3) is 31 to 32.5 mm.

3. The light distribution system according to claim 1, characterized in that: The high-beam convex lens (5) is a deformed aspheric surface made of high borosilicate glass, and the X-axis and Y-axis coefficients of the deformed aspheric surface are both elliptical surface coefficients, including: the major axis of the elliptical crown bottom is 62-63.5 mm, the minor axis is 56.5-58 mm, the crown height is 24.5-25.5 mm, and a flange edge is provided at the periphery of the crown bottom; The high-beam convex mirror bracket (12) is provided with a second annular groove, and the flange edge of the high-beam convex mirror (5) is embedded in the second annular groove and fixed by a second clamping ring (13), thereby ensuring that the distance between the light-emitting surface of the high-beam LED module (4) and the crown bottom of the high-beam convex mirror (5) is 29 to 31 mm.

4. The light distribution system according to claim 1, characterized in that: Flange edges are respectively arranged on two pairs of side edges of the light incident end planes of the left diffuser (81) and the right diffuser (82), and each flange edge is provided with a bolt hole (6). The flange edges of the left diffuser (81) and the right diffuser (82) are respectively mounted on the lamp body (9) by means of screws.

5. The light distribution system according to claim 1, characterized in that: The light distribution system further comprises a power drive board (16) installed in the lamp body (9), and a decorative board (14) and a mask (15) fixed to the open end of the lamp body (9); The low-beam LED module (1), the high-beam LED module (4), the left diffused-light LED module (71) and the right diffused-light LED module (72) are respectively integrated on the power drive board (16), and the power line (17) led out from the power drive board (16) passes through the outlet hole at the bottom of the lamp body (9) and is connected to an external circuit; The low-beam convex mirror bracket (10) and the high-beam convex mirror bracket (12) are integrally formed and fixed to the inner bottom of the lamp body (9) by screws, and the decorative plate (14) is installed on the non-light-emitting surfaces of the low-beam convex mirror bracket (10) and the high-beam convex mirror bracket (12); The inner wall of the open end of the lamp body (9) is provided with a positioning groove, and the periphery of the mask (15) is provided with a snap-fit ​​structure matching the positioning groove. The mask (15) is installed on the open end of the lamp body (9) through the snap-fit ​​structure, and the gap thereof is sealed by silicone.

6. A high and low beam integrated lamp, characterized in that: The high and low beam integrated lamp is provided with a low beam unit, a high beam unit and a diffuse light unit in the light distribution system according to any one of claims 1 to 5; The lamp body (9), the decorative plate (14) and the mask (15) are designed to be circular, and the opening size is: ￠178mm.

7. A high and low beam integrated lamp, characterized in that: The high and low beam integrated lamp is provided with a low beam unit, a high beam unit and a diffuse light unit in the light distribution system according to any one of claims 1 to 5; The lamp body (9), the decorative plate (14) and the mask (15) of the light distribution system are designed to be rectangular, and the opening size is: 200 mm×142 mm.

8. A low beam lamp, characterized in that: The low beam lamp is provided with a low beam unit and a diffuse light unit in the light distribution system according to any one of claims 1 to 5; The lamp body (9), the decorative plate (14) and the mask (15) are designed to be rectangular, and the opening size is: 167 mm×106 mm.

9. A high beam lamp, characterized in that: The high beam lamp is provided with a high beam unit and a diffuse light unit in the light distribution system according to any one of claims 1 to 5; The lamp body (9), the decorative plate (14) and the mask (15) are designed to be rectangular, and the opening size is 167 mm×106 mm.

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