Total reflection collimator and self-adaptive distance light module

Abstract

The utility model relates to a total reflection collimator and a self-adaptive distance light module, and belongs to the technical field of automobile lamps, the total reflection collimator comprises a light emergent surface, a base surface, a unilateral total reflection surface, a first side surface, a second side surface and a light guide part; the light emergent surface is positioned at the front end of the total reflection collimator, and the base surface extends backwards from the upper edge of the light emergent surface; the single-side total reflection surface extends from the lower edge of the light emergent surface to the rear upper part; the light guide parts are distributed at the rear end of the total reflection collimator in an array mode in the transverse direction, and each light guide part comprises an incident face, a first side reflection face and a second side reflection face, wherein the first side reflection face and the second side reflection face are located on the two sides of the incident face respectively. Compared with a silica gel self-adaption high beam scheme, the total reflection collimator has the advantages that the divergence degree of light emitted by the collimator in the vertical direction is small, the requirement for a smaller and smaller lens opening can be better met, the structural mechanical strength is high, and the requirement for the machining technology is low.

Description

TECHNICAL FIELD

[0001] The utility model discloses the technical field of automobile lamp, specifically relates to the full reflection collimator of automobile lamp. BACKGROUND

[0002] With the development of intelligent automobile and car lamp technology, the intelligent degree of car lamp is higher and higher. Adaptive driving beam (ADB) can close the irradiation light of certain angle range in front of the vehicle when high beam is turned on, which can ensure the good illumination effect in front of the vehicle, avoid dazzling the drivers and pedestrians of the opposite vehicle, and greatly improve the driving safety.

[0003] The adaptive driving beam scheme uses a plurality of LED arrays to form a pixelated light source surface, and then projects the light source surface through an outer lens to produce a pixelated high beam illumination. Due to the existence of the traditional LED bracket frame and the patch tolerance, there is a large gap between the light emitting surfaces of adjacent LEDs. If the outer lens directly projects the LED array, the projected light spot will have a wide dark line, which cannot meet the requirements of high beam illumination.

[0004] Based on this, a collimator is added to the light emitting direction of a single LED to converge the rectangular light spot on the LED surface into a vertical long strip-shaped light spot, and the collimator light emitting end is arranged without gaps, which can produce a more uniform secondary light source surface, and then the outer lens can project a uniform high beam light pattern.

[0005] From the perspective of information transmission, the collimator functions as a light spot shaper; from the perspective of energy, it converges LED light emission in horizontal and vertical directions to improve the utilization rate of LED light emission energy.

[0006] Currently, the mature adaptive driving beam scheme uses a length of about 10mm silica gel light guide as a collimator, and each light guide has a large head and a small head. The silica gel collimator has a small light entering end size and is close to the LED, which can efficiently collect the LED light emission; the light emitting end opening is a vertical long strip shape with a large size. Each LED corresponds to a light guide, and the light emitting ends of different light guides are arranged without gaps to produce a more uniform secondary light source surface. The focal point of the outer lens is located at the secondary light source surface of the light emitting end of the light guide, which can project a uniform high beam light pattern. The silica gel light guide collimator scheme has the advantages of high heat resistance, high bright-dark contrast, and high design flexibility, and has become the mainstream choice for mass production of adaptive driving beam.

[0007] However, for the silicone adaptive high beam scheme, since the silicone material is thermosetting and soft, the silicone collimator needs to be formed by mold injection, which has a long mold opening cycle and high mold opening cost; especially for the early stage of the project, the sample cost is too high. Secondly, the silicone light guide is thin and long, and the material is soft, so the mechanical strength is low, the stability is poor, and the processing technology requirements are high.

[0008] In addition, the light emitted by the silicone light guide collimator has a large degree of divergence in the vertical direction, and the height of the opening of the outer lens also needs to be large, generally greater than 25mm, which cannot meet the requirement of smaller lens opening. Practical new type content

[0009] The purpose of the present application is to provide a total reflection collimator to at least solve some of the above technical problems.

[0010] Another purpose of the present application is to provide an adaptive high beam module provided with the total reflection collimator.

[0011] To achieve the above purpose, the total reflection collimator provided by the present application comprises a light exit surface, a base surface, a single-sided total reflection surface, a first side surface, a second side surface and a light guide part; the light exit surface is located at the front end of the total reflection collimator, the base surface extends backward from the upper edge of the light exit surface; the single-sided total reflection surface extends upward and backward from the lower edge of the light exit surface to collimate and converge the light from the light guide part to the single-sided total reflection surface in the vertical direction; the light guide part is arrayed in the lateral direction at the rear end of the total reflection collimator, each light guide part comprises an incident surface and a first side reflection surface and a second side reflection surface located on both sides of the incident surface, respectively, to collimate and converge the light from the incident surface to the first side reflection surface and the second side reflection surface from both sides in the horizontal direction.

[0012] Optionally, the single-sided total reflection surface is arc-shaped, the incident surface is a plane arranged obliquely, and the first side reflection surface and the second side reflection surface are convex.

[0013] Optionally, the light guide part is integrally formed at the rear end of the total reflection collimator and arrayed in the lateral direction in a tooth shape.

[0014] Optionally, each light guide part further comprises a top surface and a bottom surface; the top surface connects the base surface, and the bottom surface connects the single-sided total reflection surface; the bottom surface continues to extend upward and backward from the single-sided total reflection surface to collimate and converge the light from the incident surface to the bottom surface in the vertical direction.

[0015] Optionally, the length of the light guide part in the direction perpendicular to the incident surface is less than 3mm.

[0016] Optionally, the roots of the adjacent light guide sections are connected by a rounded corner with a radius R>0.2mm.

[0017] Optionally, the light exit surface is shaped as a middle flat and convex at both ends.

[0018] Optionally, the base surface, the first side surface and the second side surface are textured matte surfaces.

[0019] Optionally, the total reflection collimator is made of engineering plastic.

[0020] Optionally, the total reflection collimator is made of PMMI.

[0021] To achieve the above-mentioned another object, the adaptive high beam module provided by the utility model, including outer lens, collimator and array distribution LED, the collimator is the total reflection collimator described in any one of the above technical solutions, the LED is correspondingly arranged at the back of the light guide section, and the light emitting surface thereof is opposite to the incident surface of the light guide section.

[0022] Optionally, the outer lens includes an inner surface, an outer surface and a side surface, the inner surface is a plane or a curved surface, the outer surface is an aspheric surface and has a microstructure pattern, and the side surface includes an upper side surface, a lower side surface, a left side surface and a right side surface and is all a textured surface.

[0023] Optionally, the single microstructure of the microstructure pattern is concave, convex or planar.

[0024] Optionally, the single microstructure is quadrangular, rhombic or polygonal, and the side length is less than 2mm.

[0025] Optionally, the light emitting surface of the LED is greater than 0.5mm away from the incident surface of the light guide section.

[0026] The total reflection collimator provided by the utility model adopts one-side total reflection in the vertical direction and double-side total reflection in the horizontal direction when collimating and converging the light emitted by the LED. In the vertical direction, the light emitted by the LED is collimated and converged through the one-side total reflection surface, and then the collimated light beam is projected through the outer lens; in the horizontal direction, the light emitted by the LED is collimated and converged through the left and right side total reflection of the array distribution light guide section, and then the collimated light beam is projected through the outer lens. Since the one-side total reflection surface of the collimator is high and the width of the single light guide section in the light guide array is narrow, the far field light shape of the single LED is long strip-shaped, and the long strip-shaped light spots are closely arranged to form the adaptive high beam light shape meeting the requirements. Compared with the silica gel adaptive high beam light scheme, the light emitted by the collimator has smaller divergence in the vertical direction, and the opening of the outer lens can be reduced to less than 20mm, which can better meet the requirement of smaller and smaller lens opening.

[0027] In a preferred embodiment, the total internal reflection collimator is made of PMMI material. Compared with using silicone light guides as collimators, it can be CNC machined, which not only has low cost and short processing cycle, but also high structural mechanical strength and low processing requirements.

[0028] The adaptive high beam module provided by this utility model is equipped with the total internal reflection collimator. Since the total internal reflection collimator has the above-mentioned technical effects, the adaptive high beam module equipped with the total internal reflection collimator should also have the corresponding technical effects. Attached Figure Description

[0029] Figure 1 Axonometric view of the total internal reflection collimator provided in this embodiment of the utility model;

[0030] Figure 2 for Figure 1 Side view of the total internal reflection collimator shown;

[0031] Figure 3 for Figure 1 Top view of the total internal reflection collimator shown;

[0032] Figure 4 for Figure 1 A bottom view of the total internal reflection collimator shown;

[0033] Figure 5 for Figure 4 A magnified view of part I in the middle;

[0034] Figure 6 An isometric view of the adaptive high beam module provided in this embodiment of the utility model;

[0035] Figure 7 for Figure 6 A top view of the adaptive high beam module shown.

[0036] Figure 8 for Figure 6 A bottom view of the adaptive high beam module shown.

[0037] Figure 9 for Figure 6 The side view of the adaptive high beam module shown;

[0038] Figure 10 for Figure 6 Axonometric view of the outer lens shown;

[0039] Figure 11 for Figure 10 Front view of the external lens shown;

[0040] Figure 12 This is a schematic diagram of the converging optical path in the vertical direction of the adaptive high beam module.

[0041] Figure 13 The schematic view of convergent light path in horizontal direction of full reflection collimator of adaptive high beam module;

[0042] Figure 14 The light distribution diagram when the center LED of adaptive high beam is lighted;

[0043] Figure 15 The light distribution diagram when all the LEDs of adaptive high beam are lighted;

[0044] Figure 16 The light distribution diagram when the center two LEDs of adaptive high beam are turned off.

[0045] In the figure:

[0046] 1 - light guide part; 11 - incident surface; 12 - first side reflecting surface; 13 - second side reflecting surface; 14 - top surface; 15 - bottom surface; 2 - single side total reflecting surface; 3 - light exit surface; 4 - base surface; 5 - first side surface; 6 - second side surface; 7 - outer lens; 71 - inner surface; 72 - outer surface; 73 - side surface; 8 - collimator; 9 - LED. DETAILED DESCRIPTION

[0047] In order to make the person skilled in the art better understand the technical scheme of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0048] In this paper, the terms such as "up, down, inside, outside" are established based on the positional relationship shown in the drawings, and according to the different drawings, the corresponding positional relationship may also change accordingly, therefore, it cannot be understood as an absolute limitation on the scope of protection; moreover, the relationship terms such as "first" and "second" are only used to distinguish one part from another part with the same name, and do not necessarily require or imply any such actual relationship or order between the parts.

[0049] Please refer to Figures 1 to 5 , Figure 1 The isometric view of full reflection collimator provided by the embodiment of the present application; Figure 2 The isometric view of full reflection collimator provided by the embodiment of the present application; Figure 1 The side view of full reflection collimator shown in the figure; Figure 3 The side view of full reflection collimator shown in the figure; Figure 1 The top view of full reflection collimator shown in the figure; Figure 4 The top view of full reflection collimator shown in the figure; Figure 1 The bottom view of full reflection collimator shown in the figure; Figure 5 The bottom view of full reflection collimator shown in the figure; Figure 4 The isometric view of full reflection collimator provided by the embodiment of the present application;

[0050] As shown in the figure, in a specific embodiment, the material of the total reflection collimator is PMMI (poly-metaphenylene isophthalamide), the PMMI material can be formed by CNC processing, the cycle is short, the cost is low, and the sample can be quickly prepared in the early stage of the project to achieve the effect of scheme verification.

[0051] The total reflection collimator is a solid component, and has a single-sided total reflection surface 2, a light exit surface 3, a base surface 4, a first side surface 5, a second side surface 6, and a light guide part 1 in appearance; wherein the light exit surface 3 is located at the front end of the total reflection collimator, the base surface 4 is a plane, and the base surface 4 extends horizontally from the upper edge of the light exit surface 3 rearward; the single-sided total reflection surface 2 is arc-shaped and extends rearward and upward from the lower edge of the light exit surface 3 to play a role of collimating and converging LED light in the vertical direction.

[0052] The light guide part 1 is arrayed in the transverse direction at the rear end of the total reflection collimator, and in this embodiment, the light guide part 1 is integrally formed at the rear end of the total reflection collimator and is arrayed in the transverse direction to be tooth-shaped. Each light guide part 1 has an incident surface 11 and first and second side reflection surfaces 12 and 13 located on both sides of the incident surface 11, respectively, the incident surface 11 is an inclined plane, and the first and second side reflection surfaces 12 and 13 are outward convex in shape and mainly play a role of collimating and converging LED light in the horizontal direction.

[0053] Each light guide part 1 also has a top surface 14 and a bottom surface 15, wherein the top surface 14 is connected with the base surface 4 and both are located in the same plane, and the bottom surface 15 is connected with the single-sided total reflection surface 2, that is, the bottom surface 15 of each light guide part 1 continues to extend rearward and upward from the single-sided total reflection surface 2 to collimate and converge the light reaching the bottom surface 15 from the incident surface in the vertical direction.

[0054] Specifically, the roots of the two adjacent light guide parts 1 are connected by a round corner, the radius R of the round corner is greater than 0.2 mm, the length of the light guide part 1 in the direction perpendicular to the incident surface is less than 3 mm, the mechanical strength is high, and the processing technology requirement is low.

[0055] The light exit surface 3 can emit the light collimated and converged by the light guide part 1 and the single-sided total reflection surface 2 into the air, and the shape is a shape with a flat middle and slightly convex upper and lower ends, the slightly convex upper and lower ends can reduce the divergence angle of the edge light without affecting the central light intensity, thereby improving the light flux of the collimator emitted into the outer lens.

[0056] In addition, the base surface 4, the first side surface 5 and the second side surface 6 can be subjected to skin grinding treatment to effectively eliminate stray light.

[0057] The above embodiments are only preferred solutions of the present application, and the specific embodiments are not limited thereto, and targeted adjustments can be made according to actual needs to obtain different embodiments. For example, the total reflection collimator is used after being horizontally turned over by 180°, or other engineering plastics similar to PMMI are used, and the like. Since there are many possible ways, they will not be illustrated one by one here.

[0058] Please continue to refer to Figures 6 to 11 , Figure 6 The axial view of the adaptive high beam module provided in the embodiments of the present application; Figure 7 is Figure 6 The top view of the adaptive high beam module shown in the figure; Figure 8 is Figure 6 The bottom view of the adaptive high beam module shown in the figure; Figure 9 is Figure 6 The side view of the adaptive high beam module shown in the figure; Figure 10 is Figure 6 The axial view of the outer lens shown in the figure; Figure 11 is Figure 10 The front side view of the outer lens shown in the figure.

[0059] In addition to the total reflection collimator described above, the present application also provides an adaptive high beam module, which is provided with an outer lens 7, a collimator 8 and an array distributed LED 9, wherein the collimator 8 is the total reflection collimator described above, the LED 9 is arranged at the rear upper side of the light guide part 1 of the collimator 8, the light emitting surface thereof is opposite to the incident surface of the light guide part 1, the collimator 8 is used to converge and collimate the light emitted by the LED in the horizontal and vertical directions, and the outer lens 7 is used to further converge and collimate the light emitted by the collimator 8 to the outer lens 7, and at the same time, the light spot shape generated by the collimator 8 is projected to generate a required illumination light spot.

[0060] The material of the outer lens 7 can be PMMA (polymethyl methacrylate), which is a solid part, has an inner surface 71, an outer surface 72 and a side surface 73 in shape, the inner surface 71 is a plane or a curved surface, the outer surface 72 is an aspheric surface and has a microstructure pattern, the side surface 73 is divided into an upper side surface, a lower side surface, a left side surface and a right side surface, and all of them are subjected to skin treatment to eliminate stray light.

[0061] The single small microstructure of the microstructure pattern of the outer surface 72 can be concave, convex or planar, the single small microstructure is quadrangular, rhombic or other polygonal shape, and the side length is < 2 mm, which has the effect of improving the uniformity of the adaptive high beam light spot.

[0062] The emitting surface of the LED 9 is greater than 0.5 mm from the incident surface of the light guide part 1, the horizontal opening width of the inner surface 71 and the outer surface 72 is 50 mm, the vertical direction opening height is 20 mm, the outer surface 72 can generate a rectangular array after being projected to the inner surface 71, and the length and width of the single rectangle are both less than 2 mm.

[0063] Please continue to refer to Figures 12 to 16 , Figure 12 The schematic diagram of the converging light path in the vertical direction of the adaptive high beam module; Figure 13 The schematic diagram of the converging light path in the horizontal direction of the total reflection collimator of the adaptive high beam module; Figure 14 The light distribution diagram of the adaptive high beam when the center LED is lit; Figure 15 The light distribution diagram of the adaptive high beam when all the LEDs are lit; Figure 16 The light distribution diagram of the adaptive high beam when the center two LEDs are turned off.

[0064] When the collimating and converging LED emits light, the adaptive high beam module adopts single-side total reflection in the vertical direction and double-side total reflection in the horizontal direction.

[0065] When working, in the vertical direction, part of the light emitted by the LED 9 reaches the single-side total reflection surface 2 and is collimated and converged through the single-side total reflection surface 2, and a small part of the light emitted by the LED 9 reaches the bottom surface 15 of the light guide part 1 and is collimated and converged through the bottom surface 15, and then the collimated light beam is projected through the outer lens 7; in the horizontal direction, the light emitted by the LED 9 is left and right side totally reflected and collimated and converged through the array distributed light guide part 1, and then the collimated light beam is projected through the outer lens 7.

[0066] Due to the high height of the single-side total reflection surface 2 of the collimator 8 and the narrow width of the single light guide part 1 in the light guide array, the far field light shape of a single LED 9 is a long strip (see Figure 14 ); By closely arranging different long strip light spots, the required adaptive high beam light shape can be formed (see Figure 15 ), and after turning off the center two LEDs 9, a non-continuous light shape can be formed (see Figure 16 ).

[0067] Compared with the silica gel adaptive high beam solution, the vertical divergence angle of the collimator exit light can be reduced, the outer lens opening can be ≤20 mm while meeting the lighting performance, and the increasingly smaller lens opening requirement can be better met.

[0068] The full reflection collimator and the adaptive high beam module are described in detail above. The principle and implementation mode of the present application are described by applying specific examples in this paper, and the above description of the examples is only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A total reflection collimator characterized by, The application relates to a full reflection collimator, which comprises a single full reflection surface (2), a light exit surface (3), a base surface (4), a first side surface (5), a second side surface (6) and a light guide part (1); the light exit surface (3) is located at the front end of the full reflection collimator, the base surface (4) extends backward from the upper edge of the light exit surface (3); the single full reflection surface (2) extends upward and backward from the lower edge of the light exit surface (3) so as to collimate and converge the light from the light guide part (1) to the single full reflection surface (2) in the vertical direction; the light guide part (1) is arrayed in the lateral direction at the rear end of the full reflection collimator, each light guide part (1) comprises an incident surface (11) and first and second side reflection surfaces (12 and 13) located at the two sides of the incident surface (11) respectively, so as to collimate and converge the light from the incident surface (11) to the first and second side reflection surfaces (12 and 13) in the horizontal direction.

2. The total internal reflection collimator of claim 1, wherein, The single full reflection surface (2) is arc-shaped, the incident surface (11) is a plane arranged in an inclined manner, and the first and second side reflection surfaces (12 and 13) are outward convex.

3. The total internal reflection collimator of claim 2, wherein, The light guide part (1) is integrally formed at the rear end of the full reflection collimator and is arrayed in the lateral direction in a tooth shape.

4. The total internal reflection collimator of claim 3, wherein, Each light guide part (1) further comprises a top surface (14) and a bottom surface (15); the top surface (14) is connected to the base surface (4), and the bottom surface (15) is connected to the single full reflection surface (2); the bottom surface (15) extends upward and backward from the single full reflection surface (2) so as to collimate and converge the light from the incident surface (11) to the bottom surface (15) in the vertical direction.

5. The total internal reflection collimator of claim 2, wherein, The length of the light guide part (1) in the direction perpendicular to the incident surface (11) is less than 3 mm.

6. The total internal reflection collimator of claim 2, wherein, The roots of adjacent light guide parts (1) are connected through a round corner, and the radius R of the round corner is greater than 0.2 mm.

7. The total internal reflection collimator of claim 2, wherein, The light exit surface (3) is in a shape with a flat middle part and convex upper and lower ends.

8. The total internal reflection collimator of claim 2, wherein, The base surface (4), the first side surface (5) and the second side surface (6) are skin-grain frosted surfaces.

9. The total internal reflection collimator according to any one of claims 1 to 8, characterized in that, The full reflection collimator is made of engineering plastic.

10. The total internal reflection collimator of claim 9, wherein, The material of the full reflection collimator is PMMI.

11. Adaptive high beam module comprising an outer lens (7), a collimator (8) and an array of LEDs (9), characterized in that, The collimator (8) is the full reflection collimator according to any one of claims 1 to 10, and the LED (9) is arranged correspondingly above and backward of the light guide part (1), and the light emitting surface of the LED (9) is opposite to the incident surface (11) of the light guide part (1).

12. The adaptive high beam module of claim 11, wherein, The outer lens (7) comprises an inner surface (71), an outer surface (72) and a side surface (73); the inner surface (71) is a plane or a curved surface; the outer surface (72) is an aspheric surface and has a microstructure pattern; and the side surface (73) comprises an upper side surface, a lower side surface, a left side surface and a right side surface, and all the side surfaces are skin-grain treated surfaces.

13. The adaptive high beam module of claim 12, wherein, Each small microstructure of the microstructure pattern is concave, convex or planar.

14. The adaptive high beam module of claim 13, wherein, Each small microstructure is quadrangular, diamond-shaped or polygonal, and the side length is less than 2 mm.

15. The adaptive high beam module according to claim 11, 12, 13 or 14, characterized in that, The distance between the light emitting surface of the LED (9) and the incident surface (11) of the light guide part (1) is greater than 0.5 mm.

Images