LED headlamp module with lower beam brightening and uniform light spots for electric vehicle

Abstract

A low beam brightening and uniform light spot LED headlamp module for an electric vehicle comprises a PCB and a lens assembly arranged on one side of the PCB, a low beam lamp bead, a high beam lamp bead and a low beam brightening lamp bead are arranged on the PCB, the lens assembly comprises a small lens, a large lens is formed on the small lens, and a first optical surface, a second optical surface and a third optical surface are formed on the large lens. The first optical surface, the second optical surface and the third optical surface have corresponding position relations with the low beam lamp bead, the high beam lamp bead and the low beam brightening lamp bead; on the basis that the low beam brightening lamp beads are additionally arranged in the LED headlamp module for the electric vehicle, the optical surface of the small lens is adjusted, so that light spots in the low beam state are more uniform, the whole light spots are decreased in a gradient mode, no obvious fall exists, and the whole brightness is basically not changed in the switching process of high beam and low beam; meanwhile, light spots in the low beam state are more uniform, and safe riding at night is better guaranteed; the high beam and the low beam of the LED headlamp module for the electric vehicle also meet the standard requirements.

Description

Technical Field

[0001] The invention relates to an LED headlight module for an electric vehicle with brightened low beam and uniform light spot. Background Art

[0002] In the conventional LED headlight module structure for two-wheeled electric vehicles, a low-beam lamp bead is provided on the PCB board and a high-beam lamp bead is provided on each side of the low-beam lamp bead. In the low-beam state, the low-beam lamp bead is lit, and in the high-beam state, the low-beam lamp bead and the high-beam lamp bead are lit at the same time; due to the different number of lamp beads lit in the low-beam and high-beam states, the ambient brightness changes significantly during the switching between low-beam and high-beam driving at night, which causes certain discomfort to the rider and affects driving safety.

[0003] In order to keep the ambient brightness basically unchanged during the switching between low beam and high beam while driving at night, the applicant thought of adding low beam brightening lamp beads on the PCB board. The low beam brightening lamp beads are arranged above the high beam lamp beads. In this way, in the low beam state, the low beam lamp beads and the low beam brightening lamp beads are lit, and in the high beam state, the low beam lamp beads and the high beam lamp beads are lit, which ensures that the ambient brightness remains basically unchanged during the switching between low beam and high beam, and also makes full use of the heat dissipation conditions of the original PCB board. At the same time, there is no need to adjust the optical performance of the lens. Through the configuration of the low beam brightening lamp beads, the lighting effect of the low beam state is improved, and the switching between low beam and high beam is more natural. For this reason, the applicant has filed a patent application for the scheme, and its application number is 2024218472665, and its name is a LED car light module with greatly enhanced low beam brightness.

[0004] Then, the low beam brightening lamp bead is arranged above the high beam lamp bead. Without changing the optical surface of the lens, the light of the low beam brightening lamp bead is mainly concentrated in the middle of the bright and dark cut-off line after being refracted by the lens, such as Fig.10 As shown, it can be seen that the brightness of the brightened area is significantly higher than that of other positions; however, the overall light spot of the light pattern is not uniform and there is still parallax, which some consumers find difficult to accept. Summary of the invention

[0005] In view of the shortcomings existing in the above problems, the present invention provides an LED headlight module for electric vehicles with enhanced low beam brightness and uniform light spot.

[0006] To achieve the above-mentioned object, the present invention provides an LED headlight module for electric vehicles with enhanced low beam and uniform light spot, comprising a PCB board and a lens assembly arranged on one side of the PCB board, wherein low beam lamp beads, high beam lamp beads, and low beam brightening lamp beads are arranged on the PCB board, and the lens assembly comprises a small lens and a large lens, and an optical surface 1, an optical surface 2, and an optical surface 3 are formed on the small lens, and a corresponding positional relationship exists between the optical surface 1, the optical surface 2, and the optical surface 3 and the low beam lamp beads, the high beam lamp beads, and the low beam brightening lamp beads; In the low beam state, the low beam lamp beads and the low beam brightening lamp beads are lit, the light of the low beam lamp beads passes through the optical surface 1 and the large lens to form a light spot, and the light of the low beam brightening lamp beads passes through the optical surface 3 and the large lens to form a light spot; In the high beam state, the low beam lamp beads and the high beam lamp beads are lit, the light of the low beam lamp beads passes through the optical surface 1 and the large lens to form a light spot, and the light of the high beam lamp beads passes through the optical surface 2 and the large lens to form a light spot.

[0007] Furthermore, the small lens is directly fixed to the PCB board via a fastener, the lens assembly further comprises a lens holder, the large lens is arranged on the lens holder, and the lens holder is fixed to the PCB board via a fastener.

[0008] Furthermore, the low beam lamp bead is arranged in the middle of the PCB board, the high beam lamp bead and the low beam brightening lamp bead are both provided with two and are symmetrically arranged on both sides of the low beam lamp bead, and the low beam brightening lamp bead is arranged on the outside of the high beam lamp bead.

[0009] The beneficial effects of the present invention compared to the prior art are: On the basis of adding low-beam brightening lamp beads in the LED headlight module for electric vehicles, the optical surface of the small lens is adjusted to make the light spot in the low-beam state more uniform, and the overall light spot decreases gradually without obvious difference. Not only does the overall brightness remain basically unchanged during the switching process between high and low beams; at the same time, the light spot in the low-beam state is more uniform, and safe riding at night is more guaranteed. At the same time, the low and high beams of the LED headlight module for electric vehicles meet the requirements of GB19152-2016 Class C Primary. In the brightening state, the low beam brightness is nearly 3 times higher than that of the traditional solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional image of the LED headlight module for electric vehicles with brightened low beam and uniform light spot; Figure 2 An exploded view of the LED headlight module for electric vehicles with brightened low beam and uniform light spot; Figure 3 A light pattern diagram of a low beam state of an LED headlight module for an electric vehicle with brightened low beam and uniform light spot; Figure 4 For Figure 3 Corresponding brightness diagram; Figure 5 A roadside rendering of the low beam state of the LED headlight module for electric vehicles with brightened low beam and uniform light spot; Figure 6 For Figure 5 The corresponding bird's-eye view; Figure 7 For Figure 5 Corresponding driving perspective diagram; Figure 8 A light pattern diagram of the high beam state of the LED headlight module for electric vehicles with brightened low beam and uniform light spot; Fig. 9 For Figure 8 Corresponding brightness diagram; Fig.10 A light pattern diagram of the low beam state of the LED headlight module that greatly brightens the low beam; Fig.11 The low beam test data chart of the LED headlight module that greatly increases the low beam brightness; Fig.12 For Fig.11 Corresponding test data; Fig.13 This is a low beam test data chart of an LED headlight module for electric vehicles with brighter low beam and uniform light spot; Fig.14 For Fig.13 Corresponding test data; Fig.15 This is a high beam test data chart of an LED headlight module for electric vehicles with brighter low beam and uniform light spot; Fig.16 For Fig.15 The corresponding test data.

[0011] In the figure: 1. PCB board; 2. Low beam lamp bead; 3. High beam lamp bead; 4. Low beam brightening lamp bead; 5. Lens assembly; 51. Small lens; 511. Optical surface one; 512. Optical surface two; 513. Optical surface three; 52. Lens bracket; 53. Large lens. DETAILED DESCRIPTION

[0012] like Figure 1 , Figure 2 As shown, an LED headlight module for electric vehicles with low beam brightening and uniform light spot according to an embodiment of the present invention comprises a PCB board 1 and a lens assembly 5 arranged on one side of the PCB board 1, on which low beam lamp beads 2, high beam lamp beads 3, and low beam brightening lamp beads 4 are arranged, and the lens assembly 5 comprises a small lens 51 and a large lens 53, on which an optical surface 1 511, an optical surface 2 512, and an optical surface 3 513 are formed, and there is a corresponding positional relationship between the optical surface 1 511, the optical surface 2 512, and the optical surface 3 513 and the low beam lamp beads 2, the high beam lamp beads 3, and the low beam brightening lamp beads 4; The small lens 51 is directly fixed on the PCB board 1 through a fastener, and the lens assembly 5 also includes a lens bracket 52, and the large lens 53 is arranged on the lens bracket 52, and the lens bracket 52 is fixed on the PCB board 1 through a fastener; the low beam lamp bead 2 is arranged in the middle of the PCB board 1, and there are two high beam lamp beads 3 and two low beam brightening lamp beads 4, which are symmetrically arranged on both sides of the low beam lamp bead 2, and the low beam brightening lamp bead 4 is arranged on the outside of the high beam lamp bead 3; In the low beam state, the low beam lamp bead 2 and the low beam brightening lamp bead 4 are lit, the light of the low beam lamp bead 2 forms a light spot through the optical surface 1 511 and the large lens 53, and the light of the low beam brightening lamp bead 4 forms a light spot through the optical surface 3 513 and the large lens 53; In the high beam state, the low beam lamp bead 2 and the high beam lamp bead 3 are lit, the light of the low beam lamp bead 2 forms a light spot through the optical surface 1 511 and the large lens 53, and the light of the high beam lamp bead 3 forms a light spot through the optical surface 2 512 and the large lens 53.

[0013] On the basis of adding low-beam brightening lamp beads in the LED headlight module for electric vehicles, the optical surface of the small lens is adjusted to make the light spot in the low-beam state more uniform. Not only does the overall brightness remain basically unchanged during the switching process between high and low beams, but the light spot in the low-beam state is more uniform, and the overall light spot decreases gradually without obvious differences, which ensures safe riding at night. At the same time, the low and high beams of the LED headlight module for electric vehicles meet the requirements of GB19152-2016 Class C Primary. In the brightening state, the low beam brightness is nearly 3 times higher than that of the traditional solution.

[0014] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use; Figure 3 The light pattern on the screen 10 meters in front of the lamp, the X axis is the horizontal coordinate axis, the Y axis is the vertical coordinate axis, the scale unit is millimeter, and the coordinate origin is the center position of the lens assembly 5; Figure 4 The figure shows the brightness distribution and width on the screen 10 meters in front of the lamp. The origin of the coordinate is the center of the lens assembly 5. H represents the horizontal direction, V represents the vertical direction, and the scale unit is degree (i.e., the amplitude of the light diffusion). In the figure, the maximum amplitude of the lamp irradiating the left and right sides is 15 degrees respectively, that is, the lamp can diffuse about 30 degrees in the horizontal direction; the maximum amplitude of the lamp diffusing downward is 10 degrees, that is, the light of the lamp can form a depression angle of about 10 degrees in the vertical direction; in the figure, the brightness gradually decreases from the central red area to the peripheral blue area; Figure 5 In the figure, the lamp is installed at a height of 0.8 meters, and the road surface is illuminated from the driver's perspective looking forward; Figure 6In the figure, the perspective is a bird's-eye view, that is, the road illumination observed from above, the X-axis is the distance in front of the headlight, and the Y-axis is the left and right distance of the headlight (positive is left, negative is right), the unit is meter, which can reflect the lighting paving conditions; Figure 7 In the figure, the installation height of the lamp is 0.8 meters, and the road surface illumination is from the driver's perspective. This figure can reflect the road brightness distribution and indicates that the brightest point is 30.9cd / m². The X-axis is the horizontal coordinate 0, which is the center of the lamp, and the Y-axis is the vertical coordinate 0, which represents the landing position of the light. Figure 8 The light pattern on the screen 10 meters in front of the lamp in the high beam state, the X axis is the horizontal coordinate axis, the Y axis is the vertical coordinate axis, the scale unit is millimeter, and the coordinate origin is the center position of the lens assembly 5; Fig. 9 The brightness distribution and width distribution of the lamp in the high beam state 10 meters in front of the lamp, H represents the horizontal direction, V represents the vertical direction, the scale unit is degree, and the coordinate origin is the center position of the lens assembly 5. Fig. 9 The meaning of the unit "degree" in the figure and the meaning of the colors in the figure are the same as Figure 4 Consistency; Fig.10 The light pattern on the screen 10 meters in front of the lamp, the X axis is the horizontal coordinate axis, the Y axis is the vertical coordinate axis, the scale unit is millimeter, and the coordinate origin is the center position of the lens assembly 5; and Figure 7 same, Fig.11 , Fig.13 , Fig.15 In the figure, the X-axis is the horizontal coordinate, 0 is the center of the lamp, and the Y-axis is the vertical coordinate, 0 represents the landing position of the light (the horizontal position at the same height as the lamp, used to measure the up and down direction of the light). Fig.11 , 13 15. Added the coordinate position and brightness value of the brightest point; Watch Fig.12 It can be seen that the GB19152-2016 Class C low beam requirements are met at this time, but from the brightness contour lines, it can be seen that the horizontal distribution contour lines are dense, the brightness changes rapidly, and is not uniform enough; Watch Fig.14 It can be seen that the GB19152-2016 Class C low beam requirements are met at this time; Watch Fig.16 It can be seen that the GB19152-2016 Class C high beam requirements are met at this time.

[0015] contrast Figure 3 and Fig.10 , Fig.10This is the light pattern of the low beam state of the LED headlight module with extremely bright low beam. Because the optical surface of the small lens is not adjusted, the light of the low beam brightening lamp bead is mainly concentrated in the middle of the bright and dark cut-off line after refraction by the lens, that is, Fig.10 The local spot in the middle is more dazzling, but the brightness around the local spot is still insufficient; Figure 3 In the embodiment, because the light of the low beam brightening lamp bead is refracted by the optical surface three 513 of the small lens, the light of the low beam brightening lamp bead is more evenly superimposed on the light pattern of the low beam lamp bead. The overall light spot decreases gradually without obvious drop. The overall brightness is higher and the visual effect is better.

[0016] contrast Fig.11 and Fig.13 , Fig.11 The low beam test data chart of the LED headlight module that greatly increases the low beam brightness. Fig.13 The low beam test data of the LED headlight module for electric vehicles with brighter low beam and uniform light spot is shown in the figure. Fig.11 The brightness contours in the image are densely concentrated. Fig.13 The brightness contour lines in the figure are relatively smooth, that is, the low beam spot of the improved LED headlight module for electric vehicles is more uniform with brighter low beam and uniform light spot.

[0017] Fig.15 This is a high beam test data chart of an LED headlight module for electric vehicles with brightened low beam and uniform light spot. Both the low and high beams of the LED headlight module for electric vehicles meet the requirements of GB19152-2016 Class C Primary.

[0018] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An LED headlight module for electric vehicles with brightened low beam and uniform light spot, characterized in that: The invention comprises a PCB board (1) and a lens assembly (5) arranged on one side of the PCB board (1); the PCB board (1) is provided with a low-beam lamp bead (2), a high-beam lamp bead (3), and a low-beam brightening lamp bead (4); the lens assembly (5) comprises a small lens (51) and a large lens (53); an optical surface 1 (511), an optical surface 2 (512), and an optical surface 3 (513) are formed on the small lens (51); a corresponding positional relationship exists between the optical surface 1 (511), the optical surface 2 (512), and the optical surface 3 (513) and the low-beam lamp bead (2), the high-beam lamp bead (3), and the low-beam brightening lamp bead (4); In the low-beam state, the low-beam lamp bead (2) and the low-beam brightening lamp bead (4) are lit, the light of the low-beam lamp bead (2) passes through the optical surface one (511) and the large lens (53) to form a light spot, and the light of the low-beam brightening lamp bead (4) passes through the optical surface three (513) and the large lens (53) to form a light spot; In the high-beam state, the low-beam lamp bead (2) and the high-beam lamp bead (3) are lit, the light of the low-beam lamp bead (2) passes through the optical surface 1 (511) and the large lens (53) to form a light spot, and the light of the high-beam lamp bead (3) passes through the optical surface 2 (512) and the large lens (53) to form a light spot.

2. The LED headlight module for electric vehicles with enhanced low beam and uniform light spot according to claim 1, characterized in that: The small lens (51) is directly fixed to the PCB board (1) via a fastener, the lens assembly (5) further comprises a lens bracket (52), the large lens (53) is arranged on the lens bracket (52), and the lens bracket (52) is fixed to the PCB board (1) via a fastener.

3. The LED headlight module for electric vehicles with enhanced low beam and uniform light spot according to claim 2, characterized in that: The low-beam lamp bead (2) is arranged in the middle of the PCB board (1), the high-beam lamp bead (3) and the low-beam brightening lamp bead (4) are both provided in pairs and are symmetrically arranged on both sides of the low-beam lamp bead (2), and the low-beam brightening lamp bead (4) is arranged outside the high-beam lamp bead (3).

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